QST 1930-07: Vol 14 Iss 7

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e per- i “Do- | Ss the , from » with etary, eS to lenk, DEVOTED edule ; é with ' tation : tiord opped ' 1On 1 me or Fred guest tfit in hager, f the T' dis- n the Visic on keep amb, May . The ig the up at Hq. ist of sign vriter HLY, 1930

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> WO YC. a 2 WO DTOWC > WHC a6 WHC oo WHF KAW? oo WO? WHT OG WHC 26 WHC: 23 WHC? > WH? OG We 2 QP J The Radio HANDBOOK For Newcomers In The Game Ts Handbook is an eminently practical nual of amateur radio all its phases, pub- hed by the American lio Relay League, the ateur’s OWn organi- mn. It starts at the rinning and tells the le story: What ama- r radio is, How to be lio amateur, How to tain your licenses, How to build the nple apparatus of a simple station, w to build the best known equip- for the most modern station, w to operate your station. Enough WOOD CWO D FOF FOF D TWOP D FOF OD FOF OD FWOF DT WUF OD TWF D) Amateutr’s Sixth Edition (Second Printing) By HANDY and HULL For Practical Amateurs HE Handbook is the daily working guide of successful amateurs the world over. Techni- cal and operating mat- ters treated in every form, from the simplest to the most elusive and complex. Not only all sorts of modern trans- mitters and receivers but solid chapters on power antenna systems, keying supplies, methods, frequency measurement and monitoring, crystal control, radio- telephony. Not only apparatus but operating procedure, traffic handling, reports, how the Communications Department works. EVERYTHING YOU WANT TO KNOW NOW IN ITS SEVENTY-NINTH THOUSAND rmation to keep you fascinated for years. Pages - Handbook is the biggest dollar's h in the radio world. If it were ted like an ordinary textbook it | gross 500 pages and have to sell about $4, but it is printed like lr’, got into a handy 240 pages, and so vailable at ridiculously small cost. Constantly revised, the Sixth Edi- 63 x 93 196 Illustrations tion is the best ever distributed, a record-breaker in radio literature, for it has had enthusiastic reception by both novice and skilled amateur in every quarter of the globe. It contains everything the League can think of to help you as an amateur. You cant afford to be without it. Blue-and-Gold Paper Cover, $1.00 Stiff Buckram Binding, $2.00 POSTPAID ANYWHERE IN THE WORLD AMERICAN RADIO RELAY LEAGUE Hartford, Connecticut, U.S. A. YD CARD CARD CIWS CIWS CIWS CIWS CARRS CARD CDWOI

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Sid Jhe Official Organ of the AR RL VOLUME XIV JULY. 1930 NUMBER 7 I ditorials Your Proadecast Receiver as a Shortwave Superhet Geo.Grammer 8 \ Compact and Inexpensive Chemical Rectifier George S. Parsons 15 Annual Meeting of The A.R.R.L. Board K. B. Warner 20 New Two-Volt Tubes Official Frequency System Progress New DeForest Tubes Naval Reserve Holds Its First National Emergency Drill Hamming With a Portable in Africa Clyde DeVinna Correction VE2QCA New England Division Convention Iexperimenters’ Section 39 L.A.R.U. News 15 Communications Department Calls Heard Correspondence Department Correction Silent Keys Charles 8. Taylor 90 Ham-ads and QRA’s . ; 92 QST’s Index of Advertisers ok ———-— — = QUST is published monthly by The American Radio Relay League, Inc., at Hartford, Conn., U.S. A. Official Organ of the A.R.R.L. and the International Amateur Radio Union Kenneth B. Warner (Secretary, A.R.R.L.), Editor-in-Chief and Business Manager James J. Lamb George Grammer Clark C. Rodimon Technical Editor Assistant Technical Editor Managing Editor David H. Houghton G. Donald Meserve Circulation Manager idvertising Manager Advertising Offices. .... = R nee 55 West 42d Street, New York City Editorial Offices 1711 Park Street, Hartford Subscription rate in United States and Possessions, Canada, and all countries in the American Postal Union, $2.50 per year, postpaid. Single copies, 25 cents. Foreign countries not in American Postal Union, $3.00 per year, postpaid. Remittances should ve by international postal or express money order or bank draft negotiable in the U. 8. and for an equivalent amount in U.S. funds. Entered as secund-class matter May 29, 1919, at the post office at Hartford, Connecticut, under the Act of March 3, 1879. Ac- fptance for mailing at special rate of postage provided for in section 1103, Act of October 3, 1917, authorized September 9, 1922. Additional entry at Concord, N. H., authorized February 21, 1929, under the Act of February 28, 1925. Copyright 1930 by the American Radio Relay League, Inc. Title registered at United States Patent Office. ene

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A SAFE (,UIDE in the selection of insulation for Radio Transmitting and Receiving Sets ¢ . - TY VER 300 broadcasting _ stations, leading radio telegraph systems, the United States Army, Navy, Air Mail, Coast Guard and Ice Patrol Sery- ices, explorers like Commander Byrd, and exacting amateurs everywhere have utilized PYREX Insulators in many spectacular achievements Regardless of whether you are sending or receiving — on land, sea or airplane you should be thoroughly familiar with the PYREX Antenna, Strain, Entering, Stand-off and Bus-bar Insulators that are helping these leaders to make radio history. The new PYREX Radio Insulator booklet lists all types and sizes with data that you will want for ready reference Return the coupon for your copy, and if you want further advice on any insula tion problem, our Technical Staff will answer your questions promptly Send the coupon for your copy CorninGc Grass Works Corning, N. Y. , Gentlemen bulletin on Radio Insulators Name Address QST 7-30 nesses OF a $0 hI WIT ———. Shi lies Say You Saw It in QST — It Ident ~~’ ifies You and Helps QST ned ) Please send me copy of your

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lany yn. — om ol EDITORIALS SIGNIFICANT feature at the recent meeting of our Board of Directors was the very lively advance interest which had been shown by members in the important topics which were to come up for discussion. Helped somewhat by the prepara- tion of a list of topics some weeks in advance of the meeting, and by the usual call in QST urging members to communicate their views to their directors, the meeting had the advantage of an unusually complete expression of amateur opinion and desire. It is a sign of good health in an organization when its members actively interest themselves in its affairs and when, as this year, they so well unite in viewpoint and general sanity of comment. This was very well shown in the study of out-of-band operating. There was little question that when the Board met the directors would feel that the Government ought to be asked to undertake better enforcement of allocations, but what would the members think of such a course? The answer was clear, because the members of every division had expressed themselves in advance, voluntarily to their directors, and in emphatic lan- guage. That, we say, is a good sign. This lively interest was particul: irly evident in the ‘phone question. Many points of view had been expressed. There were, of course, some requests to widen the 3500-3550 ‘phone band, many to keep it as it is, some to shift it to the other end of that band; suggestions to make the use of oscillator-amplifier transmitters compulsory; and many suggestions concerning the desirability of increasing the qualifications required of the ‘phone operator. Experienced "phone men in particular joined in sponsoring this last suggestion. The Board's job in deciding upon a course that represented ‘‘the greatest good to the greatest number’’ was a difficult one, but nothing like as difficult as it would have been without the very extensive expression of opinion which had been made by members everywhere. The Board's eventual decision, as reported elsewhere in this issue, was to seek no change in the size or location of the 3500-kc. ‘phone band, to frown upon any specifica- tions of apparatus, but to sponsor a new grade of operator's license to be required for all phone operating, the basic requirements of which would be the possession of special technical qualifications and at least a year’s C.W. experience. ‘Phone transmission must be recognized as an advanced form of communication, the fundamental requirement for which is the possession of a very high-grade C.W. station. To operate it intelligently the amateur must first be a skilled and experienced C.W. operator. The ‘phone bands are badly congested today, but not with good ‘phones. The ‘phone amateurs consist of a small number who are well-versed technically and seriously interested in doing a good job in a very difficult field, and a large number of ‘‘punks’’ who make the night hideous with unintelligent efforts directed at inadequate equipment. The League’s present plan for ‘phone thus proposes a big improvement for the legitimate ‘phone operators by the eventual removal of the poor ‘phones. The elimination of amateurs without the quali- fications or the enterprise to learn the code, and of C.W. amateurs who are just ‘‘messing around’’ temporarily with ‘phone, is the biggest favor that could be done the ‘phone man. The good ‘phone man deserves protection and the right to adequate operating facilities. The Board's action will clear the air for him, and the good ‘phone man will be well pleased with the change. K. B. W.

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OST | JuLy, 1930 Your Broadcast Receiver as a Short-Wave Superhet A “Converter” Which Actually Converts By George Grammer, Assistant Technical Editor QsT ssibilitv of adapting a broadcast r to short-wave reception has peen attractive but the evolu- . satisfactory converter has not st attempts at converter design ising only the audio amplifier of eceiver with an autodyne detector reney end, although a few have the superhet idea, using the r.f ne FRONT VIEW OF COMPLETE CONV] first detector circuits. The problem of using the receiver simply itself into the design of a detector and oscillator for high- broadcast resolves frequency work The advantages of a high quency for short-wave reception have previously been pointed out in QS7.' With the broadcast receiver it is possible to choose any frequency intermediate fre- between 200 and 1500 ke. at will —a consider- able advantage, since a slight shift in the if. will often mean the appearance of un- wanted interfer- ence. A further desirable result of this freedom of choice is that small differences in the short-wave coils in the oscillator and first detector can be compensated for in the tuning of the broadeast receiver itself, thus dis- to some extent ob- viating the neces- RTER sity for cutting the coils to the lifer of the receiver but does not — last quarter turn — the bugaboo of all short-wave portunity to do its stuff, because lit must be tuned off the incom- the beat frequency (interme- ind both sensitivity and seleec- ed therefore, that the ideal con- > one which utilizes to the utmost of the broadeast Phis receiver. licates a superhet converter for end. For the realization of ivity and sensitivity, the con- ve separately tuned oscillator and receiver coil construction. Finally — and in some respects this is the most important advantage of all — it is possible to cover a 1000-ke. band at any portion of the high-frequency spectrum by doing all tuning on the broadcasi receiver itse if. A pre- liminary adjustment of the controls on the con- verter to the proper setting, which need only be determined once by experiment, is all that is necessary. This means that tuning at 20,000 ke. is as easy as at 600 ke. in the regular broadcast Improving Short Wave ‘Phone Reception March, 1929 QST Wi be ph mé sat pel Cas nec Wo! we use con if t] mol the V pro’ hac! sets ofr mea rece. to ta & tu ceive erniz

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L930 gy the into high- fre ously east wuency sider- tage - shift often dis- i un- erfer- rther ult of ym of small n the oils in yr and yr can sated tuning adeast f, thus mt ob- neces- tting o the '-wave } some rage ol at any doing A pre- 1e con- nly be that 1s 0 ke. adcast QST Juzy, 1930 and who has tuned the usual type ol short-wave regenerative receiver doesn't require further explanation! Essentially, the usual superhet procedure is reversed, and instead of using a variable oscillator frequency and a fixed i.f., the intermediate frequency is varied and the oscillator frequency is fixed. There are many ways in which such a converter band anyone and this really is a converter, because it serves as a medium for converting a high frequency into a ean be constructed. The fundamental i-Irequency detector, an oscillator which will produce a 500- to 1500-ke. jower one requirements are a hig! a means of into the beat with the incoming signal, and the two and feeding the result mixing broadcast set. Although any of the many varie- ties of detector and oscillator circuits may be emploved and their coupling may be effected by several different means, | is desirable to have an arrangement in which the tuning of the first de- insofar as to avoid interlocking ol In this are better than others: the tector and oscillator is independent thing is possible controls and resultant tuning difficulties sucn respect some circuits one shown in the diagrams avoids such obstacles to a large extent. SOME IMPORTANT CONSIDERATIONS Before taking up the constructional details of the converter, it is well to consider how it is to be used. It can be combined with any broadcast receiver which has a good r.f. amplifier, even a regular super-heterodyne, but it cannot always be connected to obtain plate and filament voltages from the receiver itself. If the receiver has three or more stages of radio-frequency amplification with heater-type a.c. tubes, the first r.f. tube can be removed from its socket and the converter plug inserted in place of it, providing the re- maining two stages have sufficient gain to make satisfactory reception possible. This of course de- pends entirely on the construction of the broad- east receiver itself, and a trial will probably be determine whether or not it will work out satisfactorily. A receiver which has only two r.t hecessary to stages, even though screen grid tubes are used in them, is not adaptable to such use of the converter, because only a single i.f. stage remains if the first tube is removed. Although some of the more powerful stations come through weakly, the results are not gratifving. plate and filament supplies are provided for the converter, however, these draw- backs are overcome, and its use is not restricted to When separate sets using any particular type of tube or number fr.f. amplifier stages. This does not necessarily mean that the power supply in the broadcast receiver cannot be used; the objection is simply to taking the supply through a socket from which & tube must be removed. Many broadcast re- teivers, including d.c. sets which have been mod- with a.c emized power supplies, have power- OST 9 packs which are readily accessible; in such a case it is only necessary to tap off the requisite volt- connect to the proper posts on the In the extreme case, however, where the set has been put together with rivets, or the owner does not care to ‘“‘take chances” the only extra equipment necessary is a 90-volt battery or eliminator and a 2'%-volt transformer for fila- ment supply, neither of which is very expensive. In fact, it is that wherever possible the plate and filament supplies for the and ages converter recommended . — }——_ \ Re . | . t= ---5 ia e24 4 TYPE ' “ , | } puny —Ti— rr ee | st \: “s | 2 A 36 | a 7 3° 5 fet — as os eS | 3 72—_+ +} ; = ——— yah ) Re | -—- + | 34 | a = ee 6 4 = . ee —_ —— THE CONVERTER WHEN FIG WIRING OF USED WIT SEPARATE PLATE AND FILAMENT SUPPLIES ( Mh ( vy ( , ( WM) ps R 7 me hm R - OOO of hk megohr j ) OOO-ohr , RFC Rad , } ‘ sitable for t i 1 ( Dat Detector Oscillator 1 I Li L2 I I Ww P 1 ( } ) } ! 10 { ou th N / on forms 1 nehe diameter. converter be obtained by means other than through a plug which replaces one of the rf. tubes. CONSTRUCTION OF THE CONVERTER Referring now to Fig. 1, it will be seen that a ‘Type ‘24 screen-grid the first detector. This type of tube is a more sensitive detector than the regular three-electrode tube, and in addition the extra grid is advantageous in that it provides a good means of coupling between the detector and oscillator, when used as shown in Fig. 1, without causing annoying interlocking between the two tuning controls. A Type ‘27 is used as the oscillator. tube is used as L, and C, comprise the tuned grid circuit of the first detector, and this circuit is adjusted to the frequency of the incoming signal. The oscilla- tor employs the very common tickler circuit,

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serving as a regeneration control. en the oscillator and first de- led by the resistor R., connected te of the oscillator and the inner tor. Once again, lest there be any ng, the inner grid is connected to nes through the top of the tube 24 is acting as a space-charge } leak and condenser being con- iW WHEN PLUGIS USED een grid. In addition to serving het ween oscillator and detector, plate voltage down to the proper id bias for space charge detection ns in Fig. 1 are used when sepa- ament supplies are available, or per voltages can be taken from the r power-pack without recourse to necessitates the removal of one r.f ngement is much to be preferred thod because, as mentioned above, n is greater, and it is unnecessary vce a tube every time a change is regular broadcast band to short ns to the converter except one nent, and the single connection anged is the antenna. The post Fig. 1 is connected permanently ost on the receiver, and the post is connected to the antenna post, tself being transferred to L,. A nstalled to make this change, and regular broadcasting to short- ecomplished by throwing the } also to include an ‘‘on-off’ ment supply to the converter the recommendations above, the remove the frst r.f. tube in the in the ‘‘A”’ and ‘“‘B”’ supplies r through a plug, the connections should be used. The constants are her case, the difference being in the nsferring the signal from the con- ] + 1acast set. perated broadcast receivers, the lig. 3 may be used. In this case ng to be gained and much to be OST JuLY, 1930 sacrificed by using a plug, because it is an easy matter to get at the “A” and “B”’ batteries or eliminators, and consequently the full amplificg- tion of the set can be realized. The constants are again the same as those in Fig. 1, with the ex. ception of the extra resistors listed. Care should be taken to see whether either side of the “A’ battery is connected to ground in the broadcast receiver, and if so, the ‘*G”’ post on the converter should be left unused Pilot coil forms were chosen as the winding forms. Any other type of form of the same diameter (1'4’') can of course be used without change in the coil specifications. The Pilot forms are easily identified in pairs, however, because it is possible to use differently colored rings for each set of coils. Moreover, the first detector and oscillator coils can be differentiated by removing the unused pins from the forms; the method of making connections allows this since only three pins are required for the detector coil and four for the oscillator The arrangement of the connections on the coil sockets used in the converter shown in the photo- graph is given in Fig. 4. While other combinations may be used just as readily, those depicted will result in no harm to the tubes or batteries if a coil is inadvertently put in the wrong socket. The coils should never be placed in the sockets intended for the tubes, however! The turns of both windings on each form should be wound in the same direction; this is particularly important with the oscillator coils because if the connections and direction of windings are not correct, no os- cillations will be set up and no signals will be heard. As is usual with any short-wave receiver, it is advisable to keep all wires carrying r.f. separated as much as possible from other wires, and avoid closely paralleling them. OPERATION On this particular model the large dial in the center is the control for the oscillator tuning condenser; the small knob on the left is the first detector tuning condenser, and the similar knob on the right is the oscillator regeneration control If one has had no experience in operating 4 superhet when the various controls were not ganged together, it may take a little time to get the ‘feel’ of the set. When all adjustments are properly made the first detector will not oscillate, and neither will the broadcast receiver itself some sets will when the volume control is turned too high): therefore the ‘“‘background,”’ the hiss- ing noise accompanying the operation of 4 heterodyne or autodyne receiver, will be com- paratively low in volume. It may be necessary to provide a home-made background for prelim nary tuning and an ordinary buzzer may be used for this purpose. It should be connected to a battery, and a single wire run from one of the

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1930 n easy ries or slifieg- itS are he ex. should ae adcast verter inding same ithout forms Luse it gs lor or and 1OvVIng 10d of three 1 four he coil »hoto- ations d will 's ifa ocket ockets ms ol ind i prtant etions no os- vill be r, its trated avoid in the uning e first knob yntrol ting & e not to get ts are ‘illate itself urned » hiss- of a com- ary to ‘eliml- P used to a f the Juty, 1930 buzzer terminals to the antenna post on the converter. Some locations, particularly in city districts, are very noisy, and there is often enough electrical racket from street cars, automobiles, machinery, fans, etc., to provide all the back- ground one wants oftentimes a great deal too much of it. 4 pair of coils should now be placed in the proper sockets Be sure the detector and oscillator coils are not interchanged. Set the dial on the broadeast receiver to about 650 kilocycles: this is a convenient setting and ordinarily not so many regular broadeasting stations will be picked up directly at the low frequency end of the band. Also, tuning is more spread out at this end of the scale on many broadeast receivers. If a local station is near this frequency it may be impos- sible to cut 1t out completely, even though the antenna is transferred to the converter and is not connected to the receiver itself. The object is to pick out a quiet section of the band where the possibilities of direct pick-up are minimum, and set the dial in about the middle of it. Now set the dial on the converter (oscillator tuning) to about the center of the scale. The right- hand knob (regeneration about half the resistance is in the circuit. Now turn the left-hand knob slowly from zero to full capacity and note whether the back- ground noise comes up to a maximum at any point. In the event that there is no response with the background supplied, several things may be wrong; but to avoid interrupting the tuning story, possible sources of trouble will be con- sidered later on. For the present we will assume that a definite should be set so that detector point of maximum background has been noted on the detector tuning. The right-hand knob (regeneration control should now be advanced until the volume is maximum. It probably will be necessary to make a slight readjustment on the oscillator dial as this control is varied; a little experimenting will readily indicate which setting gives the best results. It may be found that as the setting is advanced a point will be reached where there will be a loud roaring noise set up; this is the result of too much regeneration, and the knob should be set below this point. The next step is to begin a search for signals. The oscillator dial should now be turned very slowly, the first detector knob being varied at the same time. The importance of doing this search- ing very slowly cannot be stressed too greatly, because it is easily possible to miss even a very loud station entirely by too rapid tuning. A dial with a high vernier ratio is useful on the oscillator condenser. The other two controls are not at all critical. The oscillator tuning condenser covers a con- siderable range of frequency, and it may be pos- sible to pick up the same station at two different OST ll points on the dial, depending upon the interme- diate frequency to which the broadcast receiver is adjusted. In such a case the setting of the oscil- lator condenser which gives the best volume should be chosen. The first detector setting will be the same in either case. Now turn the attention to the broadcast re- ceiver. If, as most of them are, it is a single-dial affair, it will be very easy to cover a 1000-ke. LOOKING DOWN ON THE CONVERTER band by simply turning the dial as if tuning in ordinary broadcast stations. If a group of stations has been heard previously when searching as described above, that same group will appear on the receiver dial just the same as they did on the converter dial but they will not be nearly so crowded, and tuning them in will be much easier. Although it is possible to listen with perfect satisfaction without again touching the converter after preliminary adjustments have been made, it is sometimes advantageous to reset the first- detector knob slightly in order to bring the volume up to the very maximum. Once set up correctly and adjusted, the con- verter and broadcast receiver form a really sen- sitive short-wave super-herodyne, and the results are just as good as would be obtained from a short-wave super built especially for the job and using a comparable number of tubes. In spite of the fact that the time for trying out the device has been limited, the preliminary results con- vince us that, with proper handling and reason- ably decent receiving conditions, it should be possible to pull in distant stations with ease. The set used in the tests was an Atwater-Kent Model 55 chassis, with the A-K dynamic speaker. This particular model has two screen-grid rf. amplifiers, and although it has plenty of gain, it is possible that a receiver with a_ well-designed three-stage r.f. end would be more sensitive. Separate plate and filament supplies were used on the converter, because only the stronger sta- tions would come through when the first r-f. tube was removed from the receiver to allow a plug to be used. The converter has since been given a trial on other popular models of receivers with uniformly better success when the plug is

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xpected, however, the plug works with sets which have more than amplification. AMATEUR WORK real kick on short-wave amateur signals. Since beat-note reception W ithout a separate heterodyne, received at first on their modula- »w some of those raw a.c. and ls did show up! We got a big ; > i 3 ba > Cs — =. VNECTIONS UBES B po ir 1RE USED WITH ot used in most Le t has already i most B/C receiver tching the diaphragm of the when some high-powered com- is tuned in ‘‘on the nose.’ Both reign commercials had so much could actually be ‘‘felt’’ by in front of the speaker, because ving almost a quarter inch and siderable blast of air. It was im- ird in the lab while speaking in of voice when such a signal was shout in each other's ears. (Some who were in Hartford for the the time, will attest to this. possible to get some extremely the selectivity is all that could ire a few difficulties attendant such a receiver as a telegraph get beat note reception it Is separate heterodyne, and to em outlined above would mean unother variable tuning control ossible to do all tuning with the i fixed intermediate frequency erodyne to set the beat note. In usual band-spreading tactics ipplied to the coil and condenser rcuit. The beauty of the variable quency is that the speed of tuning ne no matter what frequency the e tuned to, and therefore all in be spread on the dial in pro- OST JULY, 1930 portion to the actual number of kilocycles each band covers. A three-circuit broadcast tuner hooked up in a single-tube regenerative circuit with a wire run from the antenna post on the tuner to the ground post on the broadcast receiver will provide a satisfactory separate heterodyne The pick-up will be sufficient to give a good beat note on ¢.w. signals. The combination is a mighty good amateur ‘phone receiver, possessing the selectivity re- quired for operation in a crowded band, and providing a real audio amplifier for ham ‘phone signals. With an outfit of this sort it enough to find out whether a ‘sounds like a broadcast station,” possible to compare the two directly. It is axio- matic that anything which can be heard on the ‘phones with an ordinary short-wave receiver can be heard on the speaker with a super becauseof the greater amplification, and it really works out that way. Maybe if the neighbors can hear both sides of the conversation they won't think friend ham has gone daft and talks to himself constantly. This, we think, is the most pertinent applica- tion of the converter to amateur radio, aside from the pleasure which many of us get from listening to short-wave broadcasts and DX hunting now and then. The operation of such a receiver is quite in contrast to the usual short-wave re- ceiver, in respect to both selectivity and quality of reproduction. is easy ‘phone really because it is SHORT-WAVE BROADCASTING Naturally the converter is eminently suited for short-wave broadcast reception. If the same val- ues of condensers have been used as specified in Fig. 1 and the coils are also exactly as per specifications, the tuning should be fairly close to the dial settings which have been logged on the set shown in the photographs. With the pair of coils for the 6000-ke. band, a station should appear somewhere between 40 and 55 on the center dial if the broadcast receiver is set to 650 ke. The left-hand knob will be set at about half capacity. If such a station is heard, pass by it for the time being and see if there are any more near it. This particular band is 150 kilocycles wide, and it is usually possible to hear three or four stations working in it in the evening. If several stations are picked up, select the one nearest the center of the group, and then make a record of the oscillator dial setting for that station. This dial setting becomes the key setting for the band, and no further tuning is done on the converter itself except perhaps to make a small adjustment on the left-hand knob now and then as different stations are tuned in. The other sets of coils are treated in just the same manner. The other broadcast bands are not always as well populated as the 6000-ke. band, but it is usually possible to hear some stations on 9500 and 11,800 ke. The 15,100- and 17,750-ke. as

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1930 each tuner ircuit 1 the elver lyne beat ateur y re- and yhone easy really itis axio- n the elver useof S$ out both riend intly plica- from ening now rer is e re- ality “l for » val- cified S per close “| on nd, a n 40 elver ve set eard, e are 3 150 hear ming. e one make that key ng is ps to knob 1 in. t the e not yand, tions (0-ke. Juty, 1930 bands seem to be used mostly for daytime broad- casting, and at times it is impossible to find any signs of activity on them. The four bands last named are the ones on which foreign stations are most likely to be heard, the first for night reception, the second for afternoon and early evening, and the last two for daytime or late night transmission over great distances. One of the great disadvantages of short-wave broadcast reception is rapid and drastic fading. The newer broadcast receivers with automatic volume control are therefore particularly suited to this work, because the intensity will be main- tained at approximately the same level Receiving conditions at A.R.R.L. Headquar- ters are far from ideal, with two car-lines and an electrical plant hundred feet of the ‘lab,”’ to say nothing ol manufacturing within a few small machinery which is constantly running in various parts of the same building. The street on which the offices are located is likewise a well- travelled one, and at high frequencies the noise from ignition systems of trucks and automobiles is particularly bothersome. lor this reason a good part of the time available for experimenting was taken up with simply waiting for some especially virulent machine to let up so something besides noise could be heard. In addition, the broadcas receiver with which the experiments were mad: was ours for only three days, being borrowed from one of the local radio stores. Therefore, it is not possible to say with any certainty Just what can be expected in the way of distant reception. However, in the moments when it was possible to listen with some degree of comfort, a number of broadeast stations within a thousand miles or so on the 6000-ke. band were picked up in the afternoon and early evening with volume which was considerably more than ample — in som: eases it was impossible to turn the volume con- trol fully on without overloading the audio system. On 9500 ke. PC.J was picked up in late afternoon with fairly good volume, increasing in intensity later in the evening, and except for fading was as loud as stations are ordinarily al- lowed to become in @ home. The following morn- ing a foreign station was heard on the 17,750-ke. band with fair intensity. One or two other sta- tions were also heard on the higher-frequency bands, but lack of time or recurrence of noise prevented identification. Several of the trans- atlantic telephone stations, both English and American, were picked up on various frequencies at different times of the day. Reception was of course all on the loud-speaker. We would hesi- tate to put a pair of ‘phones on the output of a modern broadcast receiver HUNTING TROUBLE During the cut-and-try period of construction, anumber of things happened which weren't quite as they should have been. Unearthly shrieks and OST 13 howls, roars and grunts frequently rent the air, much to the disgust of persons nearby who were trying to keep their minds on their work Bursts of music and the machine-gun rattle of tape transmitters rewarded the efforts of the experimenters now and then, but added nothing to the enjoyment of the unwilling audience. ————E —E VDERSIDE OF CONVERTER However, a number of things were learned, and since others are quite likely to have the same troubles a few hints as to cures will be given. We are quite certain that the possibilities of the device as a noise-creator have not been fully probed, but a number of sources of trouble have been analyzed The commonest source of trouble is too much regeneration on the oscillator, which has been mentioned previously. As the regeneration con- trol is advanced a point will often be found where a loud mushy roar starts, which is simply an audio frequency oscillation caused by too high plate voltage on the oscillator tube with that particular coil. The remedy is quite obvious, but there is a tendency for the howl to lag so far as settings on the knob are concerned. In other words, the roar stops when the regeneration control setting is considerably lower than the point at which it started. It may happen, particu- larly when the plates of the oscillator condenser are very nearly completely unmeshed, that it will be impossible to keep the howl from breaking out at inopportune moments. This indicates that the tickler winding, L, large, and removing one turn will probably help a great deal. It is well to be cautious in removing _on the oscillator coil, is too tickler turns, because the operation of the oscil- lator at the upper end of the condenser scale may be adversely affected If nothing can be heard at any setting of the converter dials and knobs, any one of a number of things may be wrong. The chances are ten to one that some mistake has been made in the wiring or some connection has been omitted. One or both

Page 12

-- rors he defective. All connections | carefully, and then everything tinized very critically with the up poor workmanship, joints in apparently make connections, nt in laying out the r.f. parts of itter point is probably one of WENT IL SOCKETS OF THE COILS iVbD nt. We have seen any number of onstruction which were enough xperienced radio constructor, and seemed to be sincerely laboring ssion that it was “exactly like At least they said so. If you ed 1n such matters, follow the pho- king as suggested above, there is ictivity, and other tubes have results, it is probable that the functioning. In order to test for Uliammeter should be connected negative *" B”’ lead to the con- oscillator grid leak touched with oscillator is working the plate se when the grid is touched; if will happen If a milliammeter ir of ‘phones may be connected plus B lead and the same test ise a healthy click will be heard | leak is touched and when the Touching the side of the leak from the grid of the tube will sitive results ows the oscillator is not working, looked over carefully to make nnections have been made as in ill coils have been wound in the lation This latter point is probably the The coils must be wound OST JULY, 1930 in the same direction and the connections brought out as shown if the oscillator is to work. Other grid leaks and coupling resistors should be tried if all else fails. Finally, if nothing is found wrong with the coils or leaks, it may be that the osgeil- lator tube or the layout is such as to require a few more turns on the tickler winding, L, A series of chirps as either the oscillator dial or detector knob is turned indicates that the first detector is oscillating. This point can easily be set- tled by touching the grid leak on the first detec- tor with the finger, and no further chirps will be heard as long as the finger is held on the leak The detector seems most likely to break into oscillation when its tuning condenser is at about minimum capacity, and so long as it does not oscillate near where the desired stations are heard, there is no particular harm done. However, it may be aggravating at times, and can usually be stopped by either reducing the setting on the oscillator regeneration control or by decreasing the coupling between the two tubes, which re- quires a higher value of resistance at R,. Increas- ing the value of R, may also decrease the signal strength on the higher-capacity settings of the oscillator and detector tuning condensers; all these factors should be taken into account in making a permanent adjustment. With the receiver used in the was found that a particularly strong signal would cause a howl to build up if the volume control on the broadcast receiver were advanced too far. This how! did not seem to be assignable to the receiver or the converter separately, but was probably a result of interaction between them. Setting the volume control at a lower value ora slight readjustment of the detector tuning or both, will nearly always cure it. Hum is likely to be non-existent or bad, de- pending upon individual tubes. Ordinarily no trouble of this kind is encountered with the first detector, because hum does not become bother- some until a tube is oscillating. Since the first detector is not allowed to oscillate it was not an- ticipated that any trouble would be had with hum from it, and such has proved to be the case. The oscillator, however, cannot be so lightly pushed out of the picture. Some tubes will work with perfect satisfaction, introducing no more hum than is already present in the broadcast receiver itself; others are considerate. Out of some eleven tubes tested, nearly all of different makes, three were perfectly humless, five had a noticeable hum only when the volume control on the receiver was near maximum, with two the hum somewhat more noticeable than with the other five, and one out of the eleven had a really bad hum. Grounding the filament transformer, either through a resistor or con- denser, seemed to have no effect whatever, 80 that the conclusion naturally presented itself tests, it not so was Continued on page 80)

Page 13

1930 vught ther tried vrong | scil- lire a r dial e first e Set- letec- rill be leak into about S not eard, [ may lv be n the asing ‘h re- Creas- signal f the s; all nt in was vould yntrol 0 far. o the was them -ora 1 OF 1, de- ly no > first »ther- » first »t an- with case ghtly work more deast erate all of nless, plume with eable leven ment con- r, 80 itself gsr, Juty, 1930 OST 15 A Compact and Inexpensive Chemical Rectifier Applying New Ideas to Electrolytic Rectifier Design By George S. Parsons* HERE is a widespread belief among amateurs of to-day that the chemical or electrolytic rectifier, high-voltage rectification, is greatly in- ferior to other types. There is a number of rea- as applied to sons for this belief, among them the fact that the usual amateur set-up is very messy, occupies a considerable space, and requires a transformer of generous proportions tor successful operation. It must be admitted that a set-up of twenty-four pint Mason jars, coated with a greasy scum, is not beautiful to look upon, especially when it is compared to the compact and neat-appearing tube rectifiers. It is the purpose of this article to describe a chemical rectifier which meets these objections; it is highly compact, neat in appear- ance, and reasonably efficient In the April, 1929, issue of QS7 there appeared the first part of an article on rectifiers by R. J. Kryter.' Lest it appear that I am attempting to parade the ideas of others as my own, I wish to state that it was this article which gave me the fundamentals with which to work. Mr. Kryter reviewed in detail both the theory and the de- sign of rectifiers, and gave an excellent discussion of the needs of the chemical rectifier. A brief review of his findings is therefore in order. Kryter states that if an electrolytic rectifier is to function properly, certain conditions must be fulfilled. These conditions deal with purity of electrode material, current density, shape and size of electrodes, and types of solutions. It appears that one of the most important of these conditions (and one which is least often properly taken care of) is the matter of current density. For an active electrode of pure alu- minum, Kryter states that the current density should be not less than fifty milliamperes per square inch of active aluminum surface. Thus if a sheet of aluminum having an area of one square inch on one side is totally immersed in the solution, the current density should be af least one hundred mi liam pe res. The total active area of the above plate is two square inches, and a load of one hundred milliamperes would give the required current density of fifty milliam- 2717 Derby St., Berkeley, Calif Alternating Current Rectification as Applied to Radio,” April and May, 1929 (in two parts * inch. With methods much higher current densities may be used, densities as high as 2500 milliamperes per square inch being permissible. At this point I should like to bring to attention this fact: Practi- eally all the articles which have appeared in WST specify that the current density should be peres per square special cooling kept belou forty milliamperes per square inch, THE CELLS AND CONTAINER FROM ONE SIDE The small of the complete rectifier can be judged by ym parir f th the receiving tube and this figure is given in the Handbook as well. In view of the later work which has been done on the aluminum rectifier, however, the current density specification should be made at leas! fifty milliamperes per square inch of active surface. Other conditions of considerable importance are as follows: The aluminum electrode should be constructed of the purest metal obtainable; it should have a polished and well rounded sur- face in order that the potential gradient be uniform over the entire electrode. The solution

Page 14

certain organic acids and their bicar- may be used but will not give sults obtainable with an organic iT pure water. nsider the theory of design of Assuming that ised to supply one or two Type rectifer may draw the used, the plate current will be milliamperes, depending on the THE CELLS old “B hatte ircuit and the transformer v« ng from five hn depending on ninum, efinite operating eeded Is used, an oper used as the s permissible Sodium following NEW TYPE RECTIFIER ”" re nal the y cell rectify 740 volts a. 1 pair of T yy w » voltage applied tage will prob- indred to eight transformer the active elec- voltage which If an organic solution of ating voltage of In the bridge one-fourth of the cells must entire secondary valve position ; fier consisting voltage when thus a bridge- of twenty-four te without danger of overload at ch as 960 volts (r. ted that the alur olished and roun m.s. ninum electrode ded surface and ners should be avoided. Perhaps » realize this is t o use aluminum OST the con- JuLy, 1930 wire as the active electrode. Aluminum wire of No. 14 gauge has a diameter of 0.064 inches. The area of the surface of the wire is given by the expression DL, where D is the diameter of the wire and L the length. rD is 0.201 inch: The wire has a surface area of 0.201 square inch per linear inch. Since the current density must be not less than fifty milliamperes per square inch, not more than 1.8 square inches of aluminum should be exposed to the solution. If the rectifier is to be used on very light loads (60 milliamperes or less the area should be even less, about one square inch being suitable. Assuming that a load of at least one hundred milliamperes will be drawn, the value of 1.8 square inch should be used, and may be obtained by immersing at least nine inches of the aluminum wire in the solution. Allowing three inches for connections, the wire should be cut in twelve-inch lengths. Since organic solutions are to be used, carbon is probably the best suited for use as the inert electrode, and may be easily obtained from an old “B” battery. Carbon rods obtained from this source should be carefully cleaned in boiling water. This will remove the ammonium chloride and other impurities which may be present on the rods. It is always desirable, in a cell of this sort, to reduce the resistance to a minimum. To do this the electrodes should be mounted as close to each other as is possible. Five millimeters (about 0.2 inch) is a convenient distance. It is not advisable to mount the electrodes closer than this, since with changing temperature some of the organic salts present in the solution may crystallize out around the electrodes and erratic per- formance. In place of the usual pint Mason jars or drink- ing glasses, test tubes were used as containers. cause Test tubes are small, cheap, easy to obtain, and may be mounted in a small box, thus providing a very compact and neat arrangement. Following this design the rectifier described below was built. The rectifier network consists of twenty-four cells. The containers are test. tubes, six inches in length and seven-eighths inch in diameter. The tubes are mounted in two rows in a wooden box, twelve inches long, two inches wide, and suff- ciently deep so that only the rims of the test tubes are above the top of the box. The tubes are held in place by pouring molten paraffin around them. The electrodes were made as follows: Carbon rods of approximately four-inch length were ob- tained from an old “B” battery. These rods were thoroughly cleaned in boiling water and dried. Short. pieces of rubber tubing of sufficient diameter to fit snugly to the carbon rod were pushed over each end. At the top, sufficient car- bon was left exposed to make a connection. A piece of aluminum wire of No. 14 gauge was then led down the side of each rod: two and one half > = — -—= -—«

Page 15

1930 ire of :. The Vv the f the e wire linear it less more ld be to be * less quare of at n, the | may nches wing Id be arbon inert m an from oiling loride it on rt, to » this each it 0.2 sable since ranic e out per- rink- ners. and iding wing yuilt. -four es in The box, suffi- test S are yund rbon ? ob- re yds and “jient were car- oe then half turns were made about the lower rubber sleeve, and the wire led back up along the opposite side of the rod.2 The aluminum wire was then secured to the upper rubber sleeve by means of a few turns of a thin twine. Connections to the carbon rods were made by wrapping the ends of the rods with several turns of bare copper wire of No. 24 gauge, and soldering a short piece of No. 16 bare copper wire to the wrapping of No. 24 wire. The drawing, Fig. 1, illustrates the design. The electrodes were placed in the tubes and connected in the usual bridge form. An organic solution? was poured into the cells and the rectifier was connected to the secondary of a transformer of five hundred watts input, the secondary voltage being 750 volts (r.m.s.). The time required for forming was approximately one minute and the leakage after this time but a few milliamperes. As Kryter states, the performance of the usual chemical rectifier is limited by the heat developed in the solution. As the solution undergoes a rise in temperature, the working voltage decreases. More explicitly, the leakage effects increase with increasing temperature, finally reaching a point where the rectifier ceases to operate and acts as a dead short on the high-voltage supply line. Assuming that the rectifier will always be oper- ated at or below the rated working voltage, the point at which the rectifier suffers complete break-down depends upon the ratio of heat de- veloped to heat radiated. If the rectifier is capable of radiating heat as rapidly as heat is produced, regardless of current, exceedingly high currents could be drawn without overloading the rectifier. In actual practice any rectifier has a definite current rating which may not be exceeded with- out overheating. This limit is set by the con- struction of the rectifier. For example, the one described in this paper has the cells imbedded in paraffin, which is a rather poor radiator of heat. Thus the maximum permissible load is not large probably not over 250 milliamperes for short periods. In any electrolytic cell through which an electric current is flowing, energy is being dissi- pated in the form of heat and in electrolysis of the solution. The electrolysis may be accom- panied by certain chemical reactions which may either liberate or absorb heat, depending on the exact nature of the reactions. In order to deter- mine the relation between these two values, the following experiment was carried out. A direct current was sent through a single cell consisting of one of the electrodes described above immersed in 600 ecs. of the solution in a large Dewar flask. Knowing the specific heat of the solution, the amount and duration of current ? If shorter rods are used, more turns of aluminum wire should be wound around the lower rubber sleeve Editor. The formula for the electrolyte is given at the end of this article Editor Juty, 1930 OST 17 flow, and the resistance of the cell, the heat de- veloped due to the resistance of the solution could be calculated from the expression, H = [? R/4.187. Measuring the rise in temperature by means of a Beckman thermometer and calcu- lating the total heat developed, it was found that for a given current flow the experimental value ” 3 1 4 7100 800 r | ] 7 Oc. voL.7Ts 500} ] ———_—__++ ——__ 480}—____| [ | | |_| 400 a i. 25 50 75 100 125 so CURRENT OUTPUT, MILLIAMPERES FIG. 2 VOLTAGE REGULATION CURVE OF THE RECTIFIER The trar former secondary voltage is 750 (r.m.s and the load pure , corresponded very closely to that calculated. This means, of course, that whatever heat may be absorbed or given out by the chemical re- action going on within the cell is small in com- parison to the heat developed by the resistance of the cell to the current flow. If we calculate on the basis of the above data) the heat de- veloped in the rectifier network described above, with a load of 200 milliamperes, it will be found that a rise in temperature of 0.115 deg. C. might be expected. It will be shown that this value is very much too low. Let us now consider the rectifier under actual operating conditions. Suppose the output to be 500 volts at a load of 100 milliamperes. Assuming an overall efficiency of 50°, the total input to the rectifier is 100 watts and the loss in the rectifier must be 50 watts. With about 20 cc. of a solution having a specific heat of 0.85, this would cause a rise in temperature of about two degrees C. per minute. However, since a great amount of this energy lost in the rectifier is spent in causing chemical action within the cells, the heat actually developed is much less than the value given above. It was found by experiment that the rise in temperature under the above con- ditions was not two degrees but was slightly less than one degree, the exact value depending some- what on the room temperature. Inasmuch as the

Page 16

a chemical rectifier being used to supply high frequency transmitter is usually tent rather than steady, and since a mount of heat will be radiated from the he rise in temperature will vary consider- r different set-ups. The reason for the error value for rise in temperature, calculated

10e0 /* A.C /nput 77s zt . te os Vi ;: =a Ss

RAC Output i’, 4uta 7 af : j ] ae J 1090

me f 2utd 364, 2yld \SRAC Output D OSCILLOGRAPH RECORDS OF THE RECTIFIER'S PERFORMANCE ny filter in the output; “B"’ is C” is with 4 pfd; and “D” is ul 2 pfd.

with 2 pfd vith a filter he d.c. values for a single cell and applied network, is probably that the formation reaking of the film by the alternating cur- volves losses which are not encountered steady current flow. The particular net- with which the above tests were made has ised to supply an intermittent load of 100 input voltage of 750 volts, for appreciable heating could be nperes at an hours. No ed e efficiency of the rectifier was found to vary the conditions of the test and the load It appears that temperature has a great to do with the efficiency, it being advisable perate at a low rather than a high tempera- \lthough the cells will operate at tempera- bove 35 degree C., it is much better to the temperature below 20 deg. C. A room OST

JULY, 19%

temperature of 68 deg. F. corresponds to temperature of 20 deg. C., hence room tempey ture is a convenient point for satisfacte operation. As a matter of fact, the rectifier W probably not show a rise in temperature of m than three to five degrees above the temperaty of the room, assuming a normal load of | milliamperes and intermittent operation. power efficiency usually will vary from 40%; 50°, and at light loads the efficiency probabj will not be more than 40° of the input. Althoug

this may seem to be low efficiency, it should ¥ kept in mind that the maximum over-all ef 77s *) = ac o, I R, im = = t c ic, a ' FIG. 4.— THE CIRCUIT USED IN MAKING T OSCILLOGRAPH RECORDS Vy 4< oltmeter, O-— 1004 olts V2— De. voltmeter, 0-1000 volts L O-henry choke. (: and C2 — 2-ufd Sfilte r condensers. Ri and R2 — Resistors. A — Milliammeter. XX O; — Osciliograph element for a.c. rectifier input 0 Oscillograph element for d.c. rectifier output Ax nput voltage, 775 eclts; d.c. output voltage, 607 d.c. output current 57 ma ciency for a perfect rectifier is 81.2%. This f lows from a consideration of the geometri properties of the sine curve. In determining the output voltage and | it should be remembered that the greater t load up to a certain point, the greater the volt drop across the rectifier; with an input volt of 750, a load of 50 milliamperes may give output voltage of 600 volts or more; a load 100 milliamperes will probably reduce t voltage (output) to about 550 or less. The exsj value may be obtained from the curves giv4 in Fig. 2. The ease with which a rectifier of this ty forms is remarkable. It may be connected direct to the high voltage supply without danger to tj transformer windings. There wili be a very lam current drain lasting for a matter of second after which the current falls very rapidly: t rectifier is formed completely in three minut This short time of formation is in sharp cont to the time required for rectifiers having Is aluminum plates and a borax solution, the ti of formation for the latter often being a matt of hours rather than of minutes. There are at least three reasons for the rapt formation of this rectifier: The aluminum us}

Page 17

ULY, 1% vonds to m temper satisfactg rectifier Wi ure of maf Ltemperaty oad of \@ ration. TI om 40% a “y probably it. Althougl it should ¥ ver-all ef AKING T ’ >. This f geometri re and lo greater t r the volt iput volt nay give e; a load reduce t s. The exa urves givd of this tyj ected direct anger tot a very lam of second rapidly: t ree minuté JULY, 1930 is very pure and has a polished surface; the area of the aluminum plate is very small; and the solution is of complex organic compounds rather than the simple inorganic salts such as sodium bicarbonate or borax. Of these reasons, the first two are probably more important than the last, and the matter of electrode area is probably the most important of all. For example, Holler and Schrodt have found that an area of one square centimeter forms almost at once, whereas an area of three hundred square centimeters requires several hours for complete formation. In the first case, twenty-five yolts were used for forming and in the second, 120 volts were used. This might be interpreted in one of two ways; either the cell forms less rapidly with the higher forming voltage or some minimum value of forming current per square centimeter of aluminum is required. I am inclined to believe that the latter is correct for this reason: If two aluminum cells are set up — one having an active electrode area of one square inch and the other an active electrode area of fifty square inches and a direct current is applied to each cell, it will be found that the small cell forms in a few minutes while the large cell requires a much greater time. In this case equal potentials are applied to each cell and the same current flows through each. This condition, while theoretically impossible, may be closely approximated by making the internal resistance of the two cells as nearly like as practicable. This may be accomplished by spacing the plates of the small cell very closely nd the plates of the large cell some distance part. Since equal currents are flowing through ch cell, it follows that the current density is auch less in the large cell than in the small one, hus making it appear that a minimum forming urrent is required. The solution employed in this rectifier is one iven by Kryter and has the following formula d operating characteristics: Formula: Ammonium citrate. . Citric acid... Ammonium phosphate Potassium citrate Distilled water Operating characteristics: Working voltage, r.m.s. Breakdown voltage, r.m.s. Critical temperature Useful life of 100 ec. of solu- tion 69 ampere hrs. In the rectifier described, each cell contains 425 gms. 368 gms. 150 gms. Ss gms. 1,000 gms. (cc.) 160 volts. 210 volts. 120 deg. F. arp contra having la’ on, the tin ng a matt or the ra minum us bout twenty ec. of solution. With a d.c. load f 100 milliamperes this means an operating life fat least 175 hours. t is possible to use other solutions in the ctifier than the one just given. The operating aracteristics, however, will vary with the solu- Ost 19 tion. Either borax or baking soda may be used, but in such cases the maximum working voltage will be less than 160 volts per cell. Furthermore, it must be remembered that the life of a simple, inorganic solution such as borax is much less = = J 1 TOP VIEW OF THE COMPLETED RECTIFIER than that of an organic solution, thus necessitat- ing more frequent change of the solution. Since the first part of this article was written, the rectifier output has been checked with an oscillograph, the records being shown in Fig. 3. The output wave shows complete rectification, being totally above the zero axis. As might be expected, since the internal capacity of the cell used as a unit is low, any smoothing effect in the rectifier itself is very small. This may be seen in curve ‘“‘A’’. With the output fed into a condenser, a distinct smoothing effect is evident. This be- comes more pronounced as the capacity is in- creased. “B’’ shows the effect of connecting a 2-ufd. condenser across the output side of the rectifier and ‘“‘C”’ shows the effect of four mi- crofarads. The addition of a choke of 36 henries gave (at least as nearly as the oscillograph could show) pure d.c., the trace being a straight line. The circuits used are shown in Fig. 4. The results obtained with the oscillograph make it quite evident that there is no excuse for not obtaining pure d.c. with a reasonably small filter; certainly a filter consisting of a 36-henry choke shunted on each side with a 2-ufd con- denser is not an elaborate filter system. A load of 54 milliamperes was on the d.c. out- put at all times, and the rectifier was permitted to operate constantly for a period of two and one-half hours. Slight heating was observed, the temperature rising to about 100 deg. F. This emphasizes that the rectifier is capable of han- dling intermittent loads well in excess of 54 milliamperes, 100 or more milliamperes being permissible under ordinary operating conditions. SG Strays “yy After the recent broadeast from W1MK about the new regulations one chap wrote in and wanted to know about the new 30- and 60-meter bands! Of course ‘‘me.”’ and “‘mtr.’’ do sound a bit alike

Page 18

OST JULY, 1930 Che Annual Meeting of the A.R.R.L. Board By K. B. Warner, Secretary [E Board of Directors of the American idio Relay League held its annual neeting in Hartford, on May 2d and under the chairmanship of President e annual meetings are the most \irs in government of our League, lirectors assemble from all over the for two days exhaustively examine the A.R.R.L. and make new plans ir nation-wide study of conditions desires. All sixteen of the directors, uppear each month on page 6 of present except Mr. Babcock from the ion, who was ill but who sent as his Foster G. Strong, W6MK, of Long rnia. The headquarters officers of ilso in attendance. roll call and the approval of the ts previous meeting the Board pro- e to the hearing of reports. Each of presented a comprehensive report on ip of certain branches of A.R.R.L. of the work of the past year and nmendations for the future. The nsel of the League similarly reported. General Manager and each of the tors presented a report on the his jurisdiction, how the members sand that, the troubles encountered, is suggested. All these reports the und accepted, and listed the topics for careful consideration. und Mr. Stewart were unanimously and vice-president, respec- 30 and 1931. There were no other mination. examined and ratified the acts of Committee in the past year, ap- ds for the expense of the annual telegram of good cheer to Mr. tting his absence, and then tackled sident problem. '-OF-BAND OPERATING problem was a study of ways and fine amateur operation to the au- which every active vs to be a vital one right now. Much given to the establishment of marker limits of each band, to increased transmissions and to other is of similar nature. Because any such be successful must be based on sound ins, this part of the subject was re- e Executive Committee for further ls, a subject yuency study. It developed that there was general senti- ment amongst the members that there was no excuse for most off-wave operating, that for the most part it was inexcusable carelessness, and that there was widespread demand amongst the great law-abiding majority of amateurs that the Government do something about it. Somewhat to the surprise of each other, every director reported that the amateurs in his division were united in urging a drastic enforcement policy, with the suspension of licenses as the penalty for violation, provided, of course, that guilt is established. It was the nation-wide sentiment that it was time to do something, that the rights of the majority must not be jeopardized by the carelessness of a few, and that the job was up to the Department of Commerce as the radio-policing agency of the Government. Accordingly, the Board unani- mously voted to advise the Department. of Com- merce, Radio Division, that it is the desire of the League that the Secretary of Commerce comply with Section 5(D) of the Radio Act of 1927, as amended, by immediately putting into effect the policy of suspending the operator's licenses of all persons consistently violating the regulations of the Commission by operating outside the fre- quency bands prescribed for amateur services. It also instructed that in all cases where the Com- munications Department of the League acquires evidence satisfactory to it of consistent off-wave operation, the Communications Manager shall forward such evidence to the Secretary of Com- merce with a specific request for suspension of operator's license. With the new monitoring station of the Radio Division in Grand Island, Nebraska, and the new equipment at each district headquarters, disciplinary suspensions should now be expected by the persistent viola- tors. ‘PHONE OPERATION As at the two previous meetings, the question of phone operation came in for a good share of the Board's attention, and, like the previous meet- ings, not only was the problem acted upon the first day of the meeting but it was taken up for reéxamination the second day and again carefully scrutinized. The Board had before it two petitions from ’phone men asking the League to sponsor widening of the 3500-ke. ‘phone privilege. It had counter requests from C.W. men that ‘phone be moved to the high-frequency end of that band, to utilize the harmonic-family then made available for three-band crystal-controlled C.W. operation. ‘Phone operators interested in this general sub

Page 19

, 1930 ird il senti- was no tor the SS, and gst the hat the what to eported nited in ith the olation shed. It as time 1ajority PSS of a irtment y of the unani- of Com- e of the comply 1927, as fect the as of all tions of he fre- rices. It e Com- Lequires ff-wave r shall f{ Com- sion of Litoring Island, t each yeNnSiONs t viola- uestion e of the 3 meet- pon. the . up for arefully etitions onsor & It had hone be and, to vailable eration. al sub- Juty, 1930 ject are requested to see this month’s editorial page, where it is more fully discussed. The over- whelming majority of amateur sentiment, as collected in each division by the directors, was against any widening of the band but in favor of a regulation which would require more ability of the ‘phone operator, because ‘phone is admit- tedly a much more complex art than C.W. Such a policy would confine ’phone operation to the men who know something about it and, by eliminating the unqualified operators, would increase the effective range of the facilities available for men who have the knowledge and the equipment to do real ‘phone work. Thus the Board unanimously yoted to seek no extension in the telephone range now, to leave it where it is, and to seek the crea- tion of an amateur telephone operator's license, to be required forall amateur telephone operation, the same to be given only to operators having at least one year’s experience in the amateur opera- tor’s class or higher, and having special technical qualifications; in other words, to require for any ‘phone operation about the same qualifications as are now necessary for the 14-mc. band. This view, incidentally, was heartily recommended by nu- merous experienced phone men. INTERNATIONAL AFFAIRS The Board unanimously voted that the League should undertake amateur representation at the next meeting of the C.C.I.R., at Copenhagen in 1931, and at the next conference for the revision of the international convention, at Madrid in 1932. Plans were made for a publicity campaign, international in character, to start a year before Madrid and having for its aim the production of a favorable background for amateur radio at that conference. Meanwhile it is hoped that the A.R.R.L. can assist the I1.A.R.U. organization in solidifying its position in the international field, which should be of invaluable assistance at both of these conferences; and plans thereto were left with the Executive Committee. The Board made an additional appropriation of funds to be drawn upon by the Executive Committee for furthering the membership devel- opment program which is now under way, based upon the beginner’s booklet which has been men- tioned in QS7’. The resumption of national con- ventions was again asked by the Central Divi- sion, but again turned down by the Board for the same reasons as in the past: that such affairs are never national in scope and that they cannot be “‘conventions’’ because, under our constitu- tion, League business is handled by the Board and not at meetings of the membership; it reiterated the statement of policy adopted at the 1927 meeting and published in QST' for April of that year. The editorial policy of QST was discussed, the salaries of officers reviewed, and a careful study made of the problem of better contact between directors and their members. OST 21 SOME AMENDMENTS OF BY-LAWS Some changes were made in the by-laws affect- ing areas outside of continental United States and Canada. It was felt that such areas which are not governed by the domestic radio laws of the two nations in which the League is centered should not participate in the making of League deci- sions. So long as they are part of League divisions they do thus improperly participate, members there vote for director and are entitled to instruct the director, and in fact a member in such an area is eligible to stand for election as director even though he does not operate under United States or Canadian radio law. These areas were origi- nally incorporated in A.R.R.L. divisions in the desire to extend the operating activities of the Communications Department to them, but in the process they became part of the whole administra- tive field of the League. A further problem arose from the fact that some of these areas are so distant that there has not been sufficient time for the casting of ballots in the election of directors. In this consideration it was considered desirable to retain in the administrative area served by the League the Territory of Hawaii, the Territory of Alaska, and the Island of Porto Rico, because these are governed by our domestic radio law and are in fact parts of the inspection districts of the Department of Commerce. The Board so amended the by-laws, however, as to eliminate Newfoundland, Labrador, Cuba, the Isle of Pines and the Philippine Islands as parts of our A.R.R.L. divisions. It was desired, neverthe- less, to retain these areas within the scope of the Communications Department, as has been re- quested by them, so a further amendment was made whereunder the operating territory of the Communications Department is defined as con- sisting of the A.R.R.L. divisions plus certain other territory attached to but not forming part of the divisions, as follows: Newfoundland and Labrador, attached to the Maritime Division; Republic of Cuba and the Isle of Pines, attached to the Southeastern Division; and the Philippines, attached to the Pacific Division. Thus there is no change in C. D. activities in these areas. The date for the receipt of ballots in director elections was changed to December 20th instead of December Ist. The one-year-old provision in the by-laws that a candidate for S.C.M. must be the holder of an O.R.S. appointment was repealed. Experience has shown that an existing 8.C.M., by his con- trol of the appointment of O.R.S.’s, has an un- warranted power over the selection of his suc- cessor, and in some cases it was being abused; so the provision was eliminated. THE TEMPORARY CERTIFICATE Many directors reported abuse, in their dis- tricts, of the temporary operator’s certificate, Continued on page 80)

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> iW CA announced OST New Two-Volt Tubes Radiotron the has of Company production w tubes, all designed to operate at nent potential, 2 volts. A general . power output tube, and a screen the new series. The general pur- wn as the UX-230, and the screen \-232, correspond approximately es other than filament voltage the Type ‘01-A and Type °22 he power output tube has no counterpart in the present smaller utput tubes, but to some extent haracteristics of the present Type \ rHI external se of the Type ‘01-A reduced to an to fit the envelope. The small and pin connections are used. The ngs and average characteristics of listed below. The corresponding of the Type ’01-A are also given | peres um peres micromhos > UX-230 neral-purpose tube is similar to the appearance, UX-2 2 0 90 —4 12500 RX 700 but the ele- 30 UX-201-A 0 5.0 06 0.25 90-135 5 —4 5to 9.0 0 2.5 11000 Ss 8.0 725 roximate direct inter-electrode capaci- X-230 are as follows: 6 uufd 3.5 pufd 2 pufd suited to all uses to which a Type put, either as a radio-frequency ctor, or intermediate audio ampli- THE UX-231 1 is designed ‘‘for use in the last , ly,’ and is capable of delivering a ount of undistorted power output to iker. In appearance it is exactly the UX-230, the only noticeable differ- S construction being in the spacing of Tentative ratings and average of this tube are as follows: iximum and recom- 2.0 volts 0.150 amperes 135 volts — 22.5 volts 8 milliamperes 4000 ohms 3.5 875 micré Amplification factor Mutual conductance Undistorted power output mhos 170 milliwatts The approximate direct inter-electrode capaci- tances are the same as those given above for the UX-230. When operated at the recommended plate voltage the grid bias should never be lower than the values specified above, since a lower bias will THE UX-230 cause an increase in plate current which may adversely affect the performance of the tube. When used correctly the output may be fed directly into a loud-speaker of suitable impedance without the use of an output transformer, since the plate current is comparatively low. THE UX-232 The new screen-grid tube has about the same external appearance as the Type ‘22, but the construction of the elements is somewhat differ- ent, the control grid and inner screen grid being oval instead of cylindrical, and the filament is in the form of an inverted “V.”’ The arrangement of the elements is shown in an illustration. The average characteristics of the tube are listed below, together with the corresponding figures for the Type ‘22. UX-232 UX-222 Filament voltage 2.0 3.3 Filament current, amperes 0.06 0.132 Plate voltage, maximum 135 135 Grid voltage (C-bias) —3.0 —1.5 Screen voltage, maximum 67.5 67.5 Plate current, milliamperes 1.5 1.5 Screen current Not over 4 of plate current Plate resistance, ohms 890,000 850,000 Amplification factor . 449 300 Mutual conductance, micromhos 550 350 The effective grid-plate capacitance of the UX-232 is 0.02 uufd., maximum. (Continued on page 82) JULY, 1930

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1930

mhos itts apaci- or the plate r than is will 1 may tube. ve fed dance , since » same ut the differ- being \t is in ‘ement be are nding current OO 300) 350 of the

Juty, 1930

OST 23 Official Frequency System Progress Elgin Observatory to Succeed W9XL—WIAXV Schedules— New Marker Station System to be Inaugurated INCE the publication of the Official Fre- quency System news in May QST' there have been important developments to- wards improving and expanding the League’s frequency calibration service to ama- teurs. In addition to a change in administration of the System which centers the supervision at Hartford headquarters, a new standard frequency station has been appointed to succeed W9XL; prospects of a Pacific Coast station (to make the third and complete station for the S.F. net) are in sight; complete codrdination of the operation of the whole system is being realized; and the Official A.R.R.L. Frequency Standard is ex- pected to be in operation at Hq by the time this issue of QST is out. THE NEW S.F. STATION The League has been fortunate indeed in secur- ing the cobperation of the Elgin Observatory of the Elgin National Watch Co. at Elgin, IIl., and in having this competent research organization accept appointment for the transmission of Official A.R.R.L. Standard Frequencies. The standard frequency station at Elgin will be in charge of Mr. F. D. Urie, W9SI, Director of Research. He will have as his assistant Mr. R. 5. Neidigh, W9BEP. Both these gentlemen are active, dyed-in-the-wool hams, experimenters of the first water, and more than ordinarily capable of handling such little things as standard fre- quency transmissions of ultimate accuracy. The time determination facilities available at the Observatory are to play an important part in the precision radio frequency work, as might be expected, and contributions to ham radio addi- tional to the standard frequency transmission tan be expected from the fellows at Elgin. The Elgin Observatory now has the experi- mental call W9XAM< assigned for the transmis- sion of time signals on 4795 ke. (see June QST for skeds) and there is a possibility that this call will be used for the S.F. transmissions also. The S.F. transmitter will be a 500-watt rig, monitored by a piezo frequency standard having an accu- racy of better than .01°%. The standard will be checked against the National Standard at the Bureau of Standards, Washington, prior to its installation at Elgin. The setting up of a station for the transmission of standard frequencies is not something to be completed in a Saturday afternoon — the job 8 a precise one and requires some time. It is hoped that sufficient progress will be made to allow publication of tentative schedules of W9XAM S.F. transmissions in the September issue of QST’. WIAXV ACTIVITIES AND SCHEDULES Standard frequency transmissions, QRG serv- ice (see May QST for details) and official observ- ing activities at WIAXYV are going full blast. Howard Chinn, Paul Hendricks and the rest of the gang at Round Hill are hitting the ball right along — but not getting deserved coéperation from the fellows for whom they are giving the service. WI1AXV wants more reports. Such reports are necessary to show what areas W1AXV is covering with the various transmissions so that the proper times of day for different frequencies can be determined more exactly and also to assist in studies of skip distances, zones of reception and so on for the amateur frequencies on which the schedules are sent. Every time you use the 8.F. transmissions of WIAXYV, send in a report. To make the reporting easier, we have plenty of S.F. Report Blanks here at Hq. Just drop a card asking for them. They will be sent ‘‘no charge’’ — and post paid. All reports should be addressed to the Stand- ard Frequency System, QS7', Hartford, Conn. A notation of the report is made for our files and the original is then sent to the proper 8.F. station. If you are not making use of the schedules — for the love of Mike Henry use them! From now on the schedules will be published in every issue of QST’.. If you don't know how to calibrate your frequency meter, monitor, or what-have-you from S.F. transmissions, dig up K. V. R. Lansingh’s dope in September, 1929, QST (page 36) and find out how. It may mean saving your license from cancellation because of off-frequency opera- tion. Here are the schedules for W1AXV Standard Frequency Transmissions during July and Au- gust. Keep them on your operating table. DATES OF TRANSMISSION Date Schedule July 11, Friday \ July 18, Friday BB July 25, Friday B July 27, Sunday Cc Aug. 8, Friday A Aug. 15, Friday BB Aug. 22, Friday ie B Aug. 31, Sunday ; Cc

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»ARD FREQUENCY SCHEDULES Tim (pn Frequency, ke B BB Cc TOO 1:00 7000 14,000 7100 1:08 7100 14,100 200 4:16 7200 14,200 ) 4:24 7300 14,300 4:32 14,400 llotted to each transmission is now ivided as follows QST QST QST de WIAXV Characteristic letter ‘‘G’’ broken Statement of frequency in ke. to rral figure and announcement of Time allowed to change to next kencies announced by WIAXYV are within 0.01%. e is E.8.T. 8:00 p.m. at WIAXV is and 4:00 p.m. is 2100 G.C.T. isteners are urged to use and report BB which is transmitted particularly WIAXV QRG SERVICE ws ought to take advantage of the QRG service’’ being offered by (nyone who can raise WIAXV during receding each 8.F. schedule can have ter frequency checked to within imply asking for a check. Complete he service were given in May QST few have taken advantage of this yn the first transmissions and more ted uency used by WIAXV during each will be approximately the middle the S.F. sked which follows. The ney for each period will be: r schedule A, 3700 ke. schedule B, 7100 ke. schedule BB, 7100 ke. c schedule C, 14,200 ke. Ver KER STATIONS”’ TO BE APPOINTED ted group of amateur stations which precise frequencies near the limits of ur bands are going to be appointed - Stations.”’ To qualify for such appoint- station must be one equipped with precision frequency apparatus to guar- t can maintain its designated frequency 0.1°). The types of transmitters best rvice are crystal-controlled outfits with ited at constant temperature and self- sets which are continuously monitored unt-temperature crystal standard. The f the station’s standard must be ac- OST JULY, 1930 curately known and frequently checked against standard frequency transmissions. Calibration by the Bureau of Standards at Washington would be best of all. Such marker stations will not be permitted to operate “flat on 7000” or on any band’s limiting frequency. The frequency specified must be not closer than 0.1°;7 of the limit. If you have the equipment and ability to ren- der service to amateur radio as the operator of a Marker Station, write HQ and give us the dope. The number of stations which can be appointed must be limited in number and they must be the best we can find. Their calls and operating fre- quencies will be published regularly in QST7’. —J.J.L. New DeForest Tubes HE DeForest Company has _ recently brought out a d.c. sereen-grid tube which, so far as we know, has no counterpart in the types made by other manufacturers. It is known as the 422-A, and is equivalent to the 422 except that the filament consumption is only 60 milliamperes, as compared with 132 m.a. for the usual ’22. The filament voltage is 3.3. The drain on the “A” battery is, therefore, the same as with a Type ’99, which makes the tube well suited for portable receivers. The 422 and 422-A differ from other Type ’22 tubes in that their plate resistance is 250,000 ohms, with a mu of 150, and mutual conductance of 600 micromhos. With this low plate resistance a greater portion of the theoretical amplification of the tube can be realized in practical circuits. The new 566, a mercury-vapor rectifier, is similar to the UX-S66, although differing in sev- eral important respects. The maximum inverse peak voltage rating is 7500, and the peak current is 600 m.a. The construction of the filament is rather novel, because it is in the form of a hor- zontal “‘Z”’ instead of the usual inverted “V”. This construction makes the plane of the anode and the plane of the filament parallel. There is also a 572, with the same sort of envelope as the UX-872, but with internal con- struction like the 566. The inverse peak voltage rating on this tube is also 7500, with a peak cur- rent rating of 2.5 amperes. Se. Strays “Bs The Constitution and By-Laws of the League have been reprinted in revised form showing all amendments up to May 15, 1930. A copy is available to any member of the League upon request.

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, 1930 against bration 1 would tted to imiting be not to ren- or of a 3 dope. »ointed be the ng fre- re. J.D. ecently which, part in It is the 422 ynly 60 for the e drain ame as ne well | 422-A it. their mu of ‘omhos. rtion of can be ifier, is in sev- inverse current ment is a hori : er > anode sort of al con- voltage ak cur- League ving all copy is e upon Juty, 1930 OST 25 Naval Reserve Holds Its First National Emergency Drill By William Justice Lee* HE Volunteer Naval Communication Reserve held its first national emer- gency drill by radio on May 1, 1930. This was an event that had been looked forward to for many months, not only by various Naval Reservists in all parts of this country, but also by the personnel of the Office of Naval Com- munications, Navy Department, Washington. At 4 p.m. E.S.T. on May Ist a despatch ad- dressed to the Commandant of each Naval District in the continental United States was handed to the supervisor in Radio Central, Navv Department, Washington. This classified as urgent, taking precedence over what is known as priority traffic, and instructed each Commandant to arrange to have either the master or alternate reserve radio control station of his district manned at 10 p.m. E.8.T. This also included the Naval Districts on the Pacific Coast. Some few days prior to this emergency drill, instructions had been forwarded by the Chief of Naval Operations to the Commandant, Twelfth Naval District, San Francisco, instructing him to designate one of the two Twelfth Naval District Reserve control stations as the senior control station for the West Coast. Accordingly Reserve Control Station NDH, located in San Francisco, was so designated. In the meantime instructions had been forwarded to the Com- mandant, Ninth Naval District, Great Lakes, Illinois, to arrange so that when the national emergency drill was conducted, Master Control Station NDS, Chicago, could act as relay for any traffic between the east and west coasts. There was no advance notice given to the reserve per- sonnel as to just what date would be decided on for this emergency drill as otherwise the emer- gency feature would not have amounted to much. The senior control station for the United States was NKF, the transmitter of which is located at the Naval Research Laboratory, Bellevue, D. C., and which is keyed from Radio Central, Navy Department. This station and all others in the master control reserve net operate on 4045 ke. The purpose of this drill was to determine speed of mobilization, completeness of repre- sentation of districts, control over the reserve stations by each district Commandant and the feasibility of relaying radio messages back and message was * Lieut. Comdr., U.S.N.R., Navy Department, Washing- ton, D. C. forth across the United States over the Naval Reserve Net. In the urgent message of instruc- tions sent to Commandants on May Ist one requirement was that certain districts should originate short messages, some of which were to be addressed to the Chief of Naval Operations, Washington, and others addressed to districts on the opposite coast. The plan of the drill was worked out so that each district, both east and west coast, would either send or receive one message. Promptly at 10 p.m. NKF, with the writer as operator, broadcast a short message of instruc- tions and then proceeded to call each station in numerical order of districts, beginning with the first and ending with the ninth. Every naval district reported with a station manned and ready for traffic. On the west coast according to instructions, the Eleventh and Thirteenth Naval Districts reported to senior control station NDH at San Francisco in the Twelfth Naval District. By 10:33 p.m. a Naval Reserve radio station in every Naval District in the United States had reported itself manned and ready for traffic. This constituted a 100% mobilization, based upon the orders from the Chief of Naval Operations. Most of the eastern Districts originated messages as instructed and sent to Chief of Naval Opera- tions through NKF. There were one or two stations that failed to originate messages, but in the main compliance with orders was very complete. The naval districts represented, the call letters of the stations on the air, and the locations were as follows: District of Columbia — NKF, Bellevue, D. C. (Senior Control) First Naval District — NDA, Medford, Mass. Third Naval District — NDF, South Man- chester, Conn. Fourth Naval District — NDC, Wilmington, Del. Fifth Naval District — NDE, Baltimore, Md. Sixth Naval District — NDJ, Atlanta, Ga: Seventh Naval District — NDL, Orlando, Fla. Eighth Naval District NDD, Pensacola, Fla. Ninth Naval District — NDS, Chicago, IIl. Eleventh Naval District— NDV, Los An- geles, Calif. Twelfth Naval District — NDH, San Fran- cisco (Senior Control)

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Naval District — NDQ, Seattle, Twelfth Naval District relayed th Naval Districts for purposes of | communication. ts had been made with the national the American Red Cross, Wash- nessage to be sent by them to the An ed Cross representative in San plan provided for this message to via NKF Washington, NDS ( NDH San Francisco, and to be NDH. A reply was to be obtained ver the same route. The message fr ngton was given filing time of is was sent to NDS at 10:52 p.m. N DH to addressee in San Fran- m. The reply was filed by Red ( rancisco, two minutes later at 11:22 1.1 vered to Red Cross, Washington, at 2nd. The total time elapsed was thirty minutes. This is com- transcontinental relays having | before in less time, but they rganized along beforehand and lerable preparation. National Emergency Drill was maximum advance preparation nd many of the stations did not tice to be on the air until just set, as instructions had to be the Commandants, in some cases miles by telephone or telegraph. his there was a very severe elec- the neighborhood of Chicago, erics seriously delaying the re- from the West Coast. The east- ss message sent by NDH to NDS ted several times and some words had to be repeated fifteen times was finally completed and the | for. The operator on duty at other than Lieutenant Com- G. Mathews, C-V(S), (Matty of ugh he reported his antenna had by lightning during the drill, was done and he stuck to his traffic was cleared. The drill 2:07 a.m. E.S.T. May 2nd by uze NKF BT WELL DONE 0207 VA was a thrill for everyone who drill. It was a wonderful thing trict station answer smartly and was called. nd think what this means. In Volunteer Communication Re- worked out on paper there were stations and very few officers and less than 150 in the whole During the course of the next five OST Juty, 1930 years this small organization developed and ex- panded until it now has one or two reserve con- trol radio stations in every naval district, assigned a naval call (‘‘N” call). Many of these stations are privately owned, although the Navy is now planning to furnish government trans- mitters to certain districts during the coming year. The progress from nearly nothing in 1925, to the present time, is shown when every continental naval district can man a reserve station during an emergency drill with six hours or less notice. A special frequency for the Naval Reserve repre- sents another great advance, for a few years ago there was no special frequency provided for naval reserve radio communication. In the matter of personnel, great strides have also been made and the Volunteer Communica- tion Reserve today represents over 2000 officers and men appointed and enlisted from among radio engineers, commercial operators, and the amateurs. We are probably safe in saying that the Communication Reserve today represents over 1000 of the best amateur stations in the United States. There are many Navy and Naval Reserve activities in which our Communication Resery- ists take part. Recently the Eagle 52 has been making week-end cruises from the Philadelphia Navy Yard and the ship’s radio is manned by a Volunteer Communication Reserve crew, con- sisting of one officer and three or four men. The Commanding Officer of the Fagle 52 has expressed himself as pleased with the services performed by these reservists and in fact it is understood that until these arrangements were made this vessel had not satisfactory communication with its district headquarters. The same system is being followed in the Fifth Naval District at Baltimore and in other naval districts. There are few amateurs to-day who do not know something about the Communication Reserve. Almost anyone who is equipped to listen on the eighty-meter band (4000 ke.) can hear naval reserve stations operated every night in the week except Saturday and Sunday. The control stations will be found on 4045 ke., between NAA on 4015 ke. and WIR on 4050 ke, One of the most active nights in the week is Thursday, because on that night the national drill net is operated from NKF. At 9:30 p.m. E.S.T. each Thursday NKI° sends a short mes- sage broadcast by radio telegraph to all districts except the West Coast. When this is concluded a short drill is held. and messages sent and received in tactical procedure. The writer has been connected with amateur, experimental and naval reserve radio for years and has seen the Naval Communication Reserve grow from almost nothing to its present state of development. It seems now almost safe to predict that within a very few years more this branch of phinwue , o & ( werk }

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930 1 ex- con- trict, these Navy rans- year. o the ental 1g an e. A epre- 3 ago 1aval have nica- hicers nong | the that sents 1 the serve sery- been Iphia by a con- The ossed “d by that ressel h its eing more » not ation d to can night The ke., 0 ke. ek is ional p.m. mes- rricts led a and teur, years serve te of edict ch of Jury, 1930 OST Hamming With a Portable in Africa By Clyde De Vinna* ENDING a troupe of thirty people into Central Africa to make a motion picture from the popular book ‘Trader Horn’ was in itself somewhat of a problem, and as the problem got more and more nearly toward asolution, many smaller and erstwhile unthought- of details began to crop up. At the outset it had been decided to establish our base at some central point, there to have our offices and laboratory for the processing of the film as we “shot” it. Im- mediately came the thought, ‘‘How to keep in touch with that base?’ for we were certain to be moving about the country; more than likely to be completely out of touch with the telegraph system, and yet it was imperative that fast and constant contact be maintained with the labora- tory, for our following move depended upon their okeh on the film sent in from that location. More- over, we must keep in touch with our business manager who would be ‘‘out ahead” of the com- pany making arrangements for forthcoming moves, and also to be reckoned with were ar- rangements for supplies (must have food! medical emergencies to be considered — and many such items It came somewhat naturally that a ham should be the solution; indeed, what problems and emergencies of like nature during recent years have not been solved by hams? Perusal of the call book and a hurry up message to W1MK brought a list of the most active ama- teurs in British Kast Africa. A ‘phone call to our old and reliable friend Ralph Heintz in San Francisco brought him down on the next train with one of his compact little portable outfits Fred Roebuck, late of IX UP, came along for moral support, but we gave him plenty of work to do when he arrived The demonstration of the set at the studio that afternoon was attended by a large and enthusias- tie gathering. Incidentally, the sound department of the studio includes in its personnel a great many hams and ex-hams; as our ‘‘audience”’ increased, the population of the sound depart- ment decreased proportionately —so much so that the boss himself came out and asked us if we would please shut down so they could do a little recording in the sound department The set is a gem. Completely portable and in- dependent, it can function in any location, and on very short notice. There are six units in the outfit, each with a heavy canvas cover, and the whole lot together weighs just over two hundred *W60J-W6ZZK, ex-FK6CR Chief Cinematographer, 829 Hemet Place, Hollywood, Calif pounds. Power is derived from a gas-engine-driven magneto generator which supplies the primary of the plate transformer at 65 volts, 240 cycles, and filament current at 10 volts. The transmitter is H. & Kk’s. modification of the standard t.p.t.g., using one ‘‘50-watter” and is simple, yet exceed- ingly flexible and efficient The receiver is standard detector and two-step, using tube-base coils and Western Electric ‘‘N”’ ¥ Photographs by Bob Roberts, M.G.M. cameraman with l'rader Horn" African Expedition THE COMPLETE OUTFIT SET UP FOR TEST IN HOLLYWOOD The gasoline engine generator set is on the ground at the left the st e-parts box opened beside it. The 50-watt trans- i the receiver are on the tripods, near the base of the na. W. S. Vandyke, director of ‘* Trader ii "st is behind the transmitter while Ralph Heintz, signer of the outfit, holds down the antenna. Fred Roebuck, -KUP WeEN BB, is custodian of the power supply with ( De \ nsuccessfully attempting to hide behind the tubes. Both the transmitter and receiver will operate on any frequency between 3700 and 19,000 kilocycles The radiating system consists of a telescopic brass mast (which can be extended to a maximum height of about thirty-five feet) as the antenna, and an adjustable counterpoise A 200 candle-power light is furnished which, when connected to the generator, supplies illumi- nation for night setups. Incorporated in the re- ceiver is a drawer which carries the headphones, spare tuning coils, and a wavemeter. Another felt-lined compartment carries the two trans- mitting tubes (one spare) and five receiving tubes. A compartment in the back holds three No. 6 dry cells comprising the ‘‘A”’ battery and two blocks of small 2214-volt ““B” battery. Poth the trans- mitter and receiver are provided with detachable

Page 26

listance of about | of the receiver forms the operat- open. The accessory case is used as fit is truly an independent unit. for description. As to performance, Something in the neighborhood of were exchanged between our outfit At AA Ls Wi Sw, ©) { Windings of Magneto- Generator EH, & K. 50-WATT T. G.T. P. INSMITTER CIRCUIT nd is now illegal fcr amateur use in er-tubing antenna, plate and grid coils runtings Any one of the eight coils nna, plate or grid circuit This ar- ney range between 19 mc. and 3700 ke having 3, 4, 6, 7, 10, 11, 14, and 15 iameter of each is approximately 3 tting variable condensers tch in tube base to disconnect shunt e tube is removed ~jrequency ¢ hoke rheostat. The characteristics of the tke this filament control most satis- r factor of supply he base station in Nairobi, work- 1500 miles and under nearly every lition — but I’m getting a little Nairobi and inquiry as to the met with the information be difficult if not impossible to red authority to use the set, the ’ there not being entirely in he amateur, and less than that Was ymmercial proposition was con- were had with the rities and, fortunately, we were them in the short-wave phase of nterviews nstration of the set one afternoon, heir government station VPQ at 500 miles) was r to them and with the aid of the as well as those at Nairobi, ar- finally made to operate the set OST JuLy, 1930 A special license was granted to Mr. Sydney Pegrume, FK5CR, at Nairobi, to handle the traffic at the headquarters end A finer lot of chaps than the personnel of VPQ would be mighty hard to locate; the chief, George F. K. Ball (VQ4MSB), Sam Hughes, and L. J Hughes — all friendly and more than anxious to cooperate. Immediately upon being authorized to operate our set under the call FKGCR, a test schedule with VPQ was arranged for each evening, and was carried out during the entire trip with very few misses. This was interesting to us, and I be- lieve was of considerable value to the Govern- ment; a complete log was kept, and also made a very comprehensive record of transmitting and receiving conditions throughout the colony. “Peggy” —then FKS5CR and now VQ4CRE — was whole-hearted in his coéperation, and went to no end of trouble and extra work in re- building, etc., to take care of his end. That the deal was a success is due just as much to his efforts as to those of anyone. It’s true that he had never handled traffic before (being a law- abiding Britisher), but a ham’s a ham under any flag and there’s not much that can stop him! A little kind assistance from ‘‘ Mac”’ now and then, and everything went swimmingly. A preliminary scouting trip served admirably to get the arrangement broken in, and by the time we swung into production some six weeks UP FOR OPERATION IN THE BELGIAN CONGO SET This QRA is some 2000 miles from the west coast of Africa The set in the tent with the portable Zepp antenna swung above it between the two tre T) v= and 1 4-me inftenna system gare very good results on both the bands after our arrival in the country, everything was running smoothly, or as nearly so as could be expected Most of our moves were made by automobile; a specially designed Hudson carrying the most

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1930 ydney e the VPQ eorge L. J us to erate edule and } very I be- »vern- ade a y and ICRE , and in re- it, the to his at he . law- r any im! A then, irably y the weeks g was Id be obile; most Juzy, 1930 vital parts of the camera outfits and the radio set. Thanks to very efficient co-workers, I never had to bother about details of camera organization, and was able to start putting up the set imme- diately upon reaching a location. Mr. Van Dyke, our director, gave me full leeway in this respect, and many a choice tent site was given up to the radio department because it was the most suita- it’s odd how often this coin- the most pleasant spot in ble spot for the set cidence happened camp proving to be the most efficient location for the wireless set (MIM Since most of our work was in the wooded sec- tions of the country, the telescoy ic mast was given up in favor of the old familiar ‘‘Zepp,”’ thereby gaining not only speed of getting into operation but also in overall signal efficiency. The detachable feeders described in a recent issue of QST were a great help in getting the set up quickly.! The radiator was 6514 feet long, and the feeders about 38 feet. Series tuning was used in the 7-me. band and parailel tuning OST 29 trip, however, is the way W1MK kept after us — “RP” and some of the rest of that outfit at Hart- ford pounding away “blind”’ night after night for months. W1MK was heard on every sked that I was able to listen to, and we tried our durndest to get through to him, but it wasn’t in the cards; 7 mec. simply couldn't make the grade. We heard hundreds of W’s in the 7000 band, in every dis- trict except the sixth and seventh, but couldn’t raise a single one of them. Incidentally, one gets a great idea of the situa- tion generally, and of the rotten (apologies to T O M) notes and rottener operating practice, by getting off at sufficient distance to hear nearly all of the stations come together in a sort of a focus. To the credit of those who deserve it, and there are many, let it be said that there was a great improvement noticed during our stay down there; during 1929 there seemed to be a sort of general cleaning up and general betterment of signals. Up to the time of departure, however, for 14 me., the transmitter being pro- vided with convenient facilities for this change. When conditions were such that 3500-ke. seemed advisable a sepa- rate counterpoise was put up, but the great bulk of the work with Nairobi was done in the 7-me. band Operating conditions in Africa are in general pretty bad, at least in those parts of the country where we worked We were at an average elevation of about 4000 feet, but usually more or less surrounded by mountains as high as 14,000 feet or so, and something in this combination of high, cool altitudes and the warm air currents from the sub- tropical sections of the country made for some mean weather conditions Static abounds and almost every day we were visited by thunderstorms and often found it necessary to ground the antenna and let it rain. Our work developed into a more or less regular routine; the VPQ sked at 630 p.m. local time, and FK5CR at 6:45. We usually cleared him _ before dinner (7:30), although frequently the sched- we was resumed after dinner. When there were no other demands, we used to work one or more of the Philippine gang in the early evening, they having just finished with their W6 skeds; had many fine QSO’s with them and gave them quite a bit of traffic for the folks back home Some evenings afforded sufficient spare time for chats with some of the European stations (there are many splendid ones), or with some of the South Africans. Many enjoyable friendships and “unofficial” skeds were thus made The outstanding pleasant recollection of the “TNov. 29 QST, pp. 43. THE “TRADER HORN” keeping contact COMPANY ON THE UPPER NILE IN UGANDA COLONY The portable set followed everywhere, from dense jungle to rocky gorge, vith the outside world Utopia had not been reached! It was interesting to note some features of the more consistent sig- nals. The best ones heard did not necessarily originate at the high powered stations; in fact, one of the two sixes heard was using a single 210 —our friend W6BWS in Phoenix, Arizona. The other six was W6EII, Oren Baker of Los Angeles, using a 50-watter. Checkups have indicated that signals from a well-adjusted, intelligently operated low-power layout will run circles around the so- called high-powered set operated carelessly. You fellows who sit back here in this land of QRM cannot imagine how I longed for a QSO with some of your good stations and I nearly burned up that little generator trying to raise some of you,

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ry [ Roebuck, who I knew was pulling KUP and W6XBB. ils finally came through, but the hem was that they came in be- 11 p.m. local time, and even the istic of us can't stay up half the n get up before daybreak the follow- Some mighty fine QSO’s were had | 2's on 14 mc., though. A fairly com- hered thy ENES IN THE CROCODILE POOL n't donned for photographic effects — ’ made shooting necessary with weapons as pt, and some of these days I hope them. Because of the pressure of ir return I have had to neglect them hich wasn't my intention by a whole can take this as an open letter of intil I have a chance to write them a | time, I sent in lists of calls heard not complete, by any means, but an idea of how the signals were nonths of our stay many interest- es were had—some funny, and norous. The radio set was a never er to the natives — they could never of course, but they associated it telegraph system; in fact, the first made the gang whose duties were the tents stood by to help dig up they were sure we had buried \ssistance was never lacking, and ild help to whatever extent they ng up the lines for the antenna, or tents in record time — but they ch a wire or any part of the set later that Mr. Waller, our ndent, knowing their liking for tering things, had very seriously i out against meddling with the lling them that if they touched nected with the radio set, huge ne were sure to leap out and com- them. Needless to say, nothing After their fashion of naming party — not always complimen- OST JULY, 1930 tary —the natives styled me “the master who talks with the winds’’ — descriptive, at least. In Africa, four o’clock tea is an institution, and we quickly fell into the habit. In this connection are served what they term “biscuits’”’ (we know ‘em as cookies), and one particular variety be- came such a favorite with the gang that it be- came difficult to keep a sufficient supply on hand. The head boy of the commissary department used to keep a few tins of them hidden away for some of his favorites, or at least we so suspected. One afternoon the steamer had just arrived with a consignment of supplies previously ordered by radio, and I knew that in the shipment were several cases of these particular biscuits, so when my personal boy arrived with the tea minus the favorite wafers, the head boy was summoned. He protested at great length that there were none of the favorite biscuits in camp, nor had there been any for a great many days; whereupon | explained, through the interpreter, of course, that I had spoken to the wind gods in connection with this momentous matter, and that they had as- sured me that upon this very day would arrive several cases of that particular delicacy — in fact, that right at that very moment, down at the landing a mile or so below camp, they were being unloaded. He could scarcely believe his ears After a visit to the landing proved that the wind gods were correct, never again was there a scare- SHOOTING A SOUND SEQUENCE IN A NATIVE VILLAGE, BRITISH EAST AFRICA The condenser microphone is suspe nded above the author's head and connects to the portable amplifier equipment at the right. The actu place in the sound truck parked in the background ul recording takes ity of the good biscuits, or of anything else in the store! It wasn’t all a joke down there, however, by 4 great deal; seamier sides put in appearance fre- quently. Late one night a playful cloudburst filled our camp with a few feet of water; the wind blew, and several tents came down, among. them the one housing the transmitter. Imagine a high- frequency transmitter soaking wet! Once we had the ‘“‘Zepp” tied off to an old dead tree; the wind brought the tree down alongside my tent. And s0 on. Each new location had its thrill of a new and

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1930 who st. , and ction know vy be- it. be- hand. ment Ly for cted. vith a d by were when is the d. He none there pon I , that | with id as- arrive — in at the being ears wind scarc- es aie eae i ruthor's t at the d truck a - = else in - bya ce fre- dburst e wind r them . high- ve had e wind And so WwW and Juty, 1930 usually different setup — new problems to be worked out. Without the splendid coéperation of mv fellow workers, cameramen, sound crew and electricians, the success of the effort would not have been nearly so marked; but they were with me 100°7, and often put in a good many hours of extra work to help me out of one difficulty or another We finally evolved a scheme which saved us a good deal of effort as well as adding to the effi- cienev of the set. When we were in one of our semi-permanent camps where we would be likely to remain for a week or more, we put up the whole camp equipment, which included a hohler light ing plant, Frigidaire, projecting machine, ete in other words we lolled in the lap of luxury, at least temporarily. We obtained a half-kilowatt 500-cycle generator, vintage of about 1910, which we hooked to the Kohler, controlling it by means of a remote control magnetic switch (dope from QST) to cut off the a.c. at the machine, eliminat- ing the hash. The scheme worked splendidly, putting an R5 to R6 signal into the East Coast U. S. A. stations, and giving FK5CR plenty of signal strength to help battle the static. A great deal of our traveling was done with a rather limited camp equipment.’ However, when we planned to be in a locality but a short time, only the necessities were taken, and those occasions brought on the use of the gas engine generator Nearly as good results were had, however, and some of the stations expressed a preference for the 240-cycle note There were times when the set had to be car- ried by porters, sometimes to quite a distance, and at such times the equipment was quite likely to receive various and sundry bumps and jolts; but it showed no ill effects from such treatment Once the generator fell into the Nile River, but seemed none the worse for it. Getting thoroughly soaked by the numerous rainstorms was more or less a regular occurrence, and while the cases show considerable wear and tear, the ‘‘works’ never missed a shot One move we made, across Lake Albert and down the Nile, called for a stay of three days on the S.S. Lugar, one of the river type of steamers which serve that territory. It was with a great deal of doubt that we put up the set, because the best installation we could get resulted in the aerial dangling out toward the stern not more than ten feet above the galvanized iron roof that covered the whole ship; visions of absorption, wobbulation and what-not came to mind, and you can imagine my embarrassment when VPQ reported the loudest sigs of the whole trip — FK5CR said he thought we had arrived in Nairobi, and the W's gave me R7! We had a lot of fun out of it, and Captain Cullum, the genial skipper, got a great kick out of sending TRs to his headquarters — the first ship equipped with wireless on Lake Albert! Another great scout, OST 31 Captain Cullum; true, the ice supply was a little shy, but everything else was FB! Practical results had from the set were legion Aside from our routine work, there were a great many instances where it saved us many times its cost and bother of maintenance. Once, for in- stance, we divided our outfit, taking a skeleton IMAGINE A HIGH-FREQUENCY TRANSMITTER SOAKING WET The author rleaning the outfit up after a cloudburst. No harm done, however, because the set is designed to work in the rain — the specifications call for operation of the set after a . ’ e has been turned on it erew into the Belgian Congo for three or four weeks work and sending the remainder of the party to Kampala, agreeing to a rendezvous some weeks later. After a few days of the bad weather then prevalent in the Congo, however, Mr. Van Dyke decided to recall the rest of the company and resume work along the original lines. With the use of native runners and the land telegraph, this probably could have been accomplished in ten days or two weeks; thanks to the radio we were all back together and ready to resume work in four days. Figure this out at the rate of $5,000 per day, which is the estimated cost of our opera- tions throughout the entire trip Dr. Clarke, our jolly and well-liked safari surgeon, found that some of his pet serums had been lost during one of the moves; a message to Nairobi started a fresh supply to us that night. Measurements for a broken piece of camera equipment were sent in by radio, and a new part left Nairobi the next morning. Details for the construction of a specially built camera car to be used in photographing animals were sent in, and the car was waiting for us when we arrived in Nairobi a week later One of the troupe was so worried about the condition of relatives ill in Nairobi that he an- nounced that he was leaving for there the follow- ing morning; this would have stopped production absolutely, as there was nothing we could do without him, he being in every scene, and the trip to Nairobi and return would have taken from a week to ten days. But ‘‘ Peggy” cranked up his trusty Rugby (he is an automobile elec- trician by trade) and following a conference with

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ials as well as with the party in ne a lengthy and detailed report and we resumed production as norning is uniformly difficult; QRN with , tly as rms ot di- ight I was at about time, and that the passing 14 me.) ry difficult plied that he hyenas i my tent ilt to read times, so It was were down OST JuLy, 1930 to be kept, and the operators were amazed at the way the little Heintz and Kaufman receiver out- performed their rather elaborate screened-grid affair, which it did time after time. FK6CR is history now, but there remain a lot of mighty pleasant mem- ories from the trip. The W6 gang was mighty loyal and fine in the way they kept looking for us and trying to raise us, as were the hams pretty well all over the U.S, and I feel under great obligations to allof them. The set is being over- hauled now, getting ready for another trip which may come up within the next few months, and perhaps then I may QSO vuntrv. and some of the stations | vere thick missed onthe African trip. np after For the _ benefit of re putting those who may be inter- unimals ested, the picture made st part, in Africa on this trip is al single TIME FOR EVENING SKEDS “Trader Horn,” and will antenna Sunest aevenn the Cones Mile ot Ge come acer Mardin probably be released rth propor- Falls, Uganda, B. E. A during 1930 by Metro- QRN at e experiments were made with the as described in QST, but there time to give it a thorough trial in Africa is very seasonal. There when it is impossible to work any 1 other times when signals come in all over the globe. One night I fellow in Cairo, Egypt, who told | been listening for months, and rst signal he had heard. Verily, the uisite of hamming in Africa is plenty of it ne bunch of hams down there, 1 keen on their organization; they journal called ‘“‘QTC” which tiled to me each month while we ways a good deal of fun was had One time, from about the center of worked a station in Venezuela, as yt so far away. The trip was very a fraternizing standpoint. Obvi- ill the ships by name, but we were German and Italian ships, and I perators uniformly courteous and ll very much interested in the little he project in general. I even main- th one of the ships for months, ime within range. “‘Sat in” on the and had plenty of fun doing it. ne ship had a difficult press sked Goldwyn-Mayer. While you are enjoying it you can figure that “ham radio’ meant a lot to us down there, both from the standpoint of time saved and of having our hobby right along with us to pass away the spare time which otherwise would have been tedious in the extreme. eg Strays “Ks W9NJ found this one in a newspaper story of recent Marconi radiophone experiments: ‘“‘Senatore Marconi reported that his power, taken from a storage battery, was only about three-quarters of a kilowatt and that he was broadcasting on a frequency of 11,254 horsepower kiloe ycle 5.” Maybe he uses a prony brake as a frequency meter! If it weren’t for the newspapers we'd be short of ‘‘strays.”’ A paper in Houghton, Mich., refer- ring to the Handbook called it the QST Hank- book! Correction In Fig. 1 on page 10, May QST, the plate and grid of the UX-842 modulator tube were reversed in the drawing. The plate should be connected to the choke 7; and the grid to the secondary of the microphone transformer.

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1930 at the r out- d-grid 1 a lot mem- ». The nighty e way for us us, as pretty U. S., great them. over- ready which in the , and y QSO ions | in trip fit of inter- made trip is 1d will leased vletro- While “ham ym the g our spare ous in ory of yower, about e was pou er uency short refer- Hank- te and versed ted to of the Juty, 1930 OST 33 VE2CA A Medium-Power Station of Modern Design T often happens that people who have some- thing to talk about are most inclined to say nothing. If Jim Lamb hadn’t dropped in on VE2CA during his vacation last summer, we probably wouldn't have had an opportunity to present this station description in QS7'— and we feel sure the amateur fraternity will be in- a Hartley circuit. While no exceptional work was done, many fine chats were had with the gang on this continent. In April, 1928, the 203-A died of old age and an 852 was installed, with greatly improved results. In the fall of 1928, spurred on by the League’s Technical Development Pro- gram, the high-C Hartley was tried, and after art, Bi et. ia 2 STATION LAYOUT AT VE2CA apparatus is out of the question. As the set is located in the living room, “ terested in it, because everything is home-made with the exception of those parts which are more economically bought than manufactured in the ordinary home workshop. Furthermore, it’s a good job, as those who have heard or worked VE2CA will testify. The owners are Mr. and Mrs. Earle H. Turner, of St. Lambert, P. Q. They both operate; in fact, the OW has been handling most of the QSO’s during the past few months. Those of us who are married know what such coéperation means; and the others don’t need a whole lot of imagination to appreciate it. Earle didn’t say just how the Mrs. came to take up amateur radio — maybe it was in self-defense. The station first went on the air in December, 1927, with a UV-203-A tube of ancient vintage in haywire”’ considerable experimenting, during which much copper tubing was wound and junked, the present 7000-ke. transmitter emerged. In the meantime the owners became much enthused over the pos- sibilities of the 14,000-ke. band, and a second transmitter for this band only was installed early this year. A general view of the station is shown in the first photograph. The apparatus is located in the living room and space is limited; consequently the equipment is compact and designed to present a neat appearance. The large frame at the left holds the two transmitters and the power sup- ply; the receivers, monitor, frequency meter and keys being on the operating table at the right and on the shelf above it. Most of the work is done on the 7000-ke. and 14,000-kc. bands, and the

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ckly shifted from one band to HE TRANSMITTERS transmitters are mounted on the ntly on 14,000 ke., the other > Ke TRANSMITTER 1 OST TI JULY, 1930 1e filament volt meter, with a double-pole double- throw switch for connecting it across either the filaments of the rectifier tubes or the oscillators, an lat -—}--—— SY 7 2 rt a oe ee yoy | , ? fe. c) iat Cel 7 SH | |i, ——ae) Sees hae | q _{— +> -{ . - -_ (eee A —eEE 3 BE f a wh og a - 7 - | [prem en 3... holt | : n =~ = R, ~ , —— , = a ry RFC, 4000 Ke TRANSMITTER 1 ‘ 1WO TRANSMITTERS AT VE I Special choke Ri: — 20,000-ohm grid lea er, R 500 ohms R 900-ohm variable - RFC, — 160 tur nil for RF 60 tur? ni form A Lnfenr remimele MA Plate milliamr } Filament voltmete ble coils for the other two most though used mainly for 7000-ke. tself is built in two sections; the construction, containing the equipment and the 14,000-ke. tending up to the sign with the the top section, of lighter ding the meter panel, 7000-kce. antenna tuning apparatus. The e dismounted by simply remov- screws which hold it in place, this king it easy to get at any portion ter without the aid of a step lad- strips are mounted on the rear connections between the two imper wires. The entire frame- es square and approximately 6 lly built and all apparatus is with the result that no trouble eed from vibration. contains the two series tuning ters e feeder system and one of the rs. The panel immediately below other antenna ammeter, the tank e 7000-ke. transmitter, and the l-tuning condenser. Part of the tter can be seen through the n this panel and the one below it. d the plate milliammeter are mounted on the ter panel. Since both transmitters are the same electri- cally and very nearly so mechanically, there is no need to consider them sep- arately. The 14,000-ke. transmitter is just below the sign with the station call letters, with the parts mounted in breadboard fashion. Two switches (not visible in the photo) provide the means of transferring the plate and filament supply from one set to the other. One, a triple-pole double-throw switch, serves as a change-over for the fila- ment leads and negative high voltage A single-pole double-throw switch takes care of the positive high voltage. A UX-S52 is used in each trans- mitter. The photograph of the rear of the top section of the frame shows the arrangement of the parts of the 7000-ke. transmitter, that of the 14,000-ke. set being similar. The tank inductance is made of 5/16-inch cop- per tubing wound to an outside diam- eter of 4 inches, and is bolted directly on the tuning condenser. This coil and the antenna coupling coil are mounted on glass rods, and the coupling is varied by sliding the antenna coil along the rods. The grid and plate blocking condensers are mounted on the leads be- twe - a en the tank inductance and the tuning con- nace nr tf - —ae tt) - -| == +} —7 at ait rhe ry, set i se, ts ee ®& th Cc, CG yuan = E} S/ zt sec, 0, Tr . =— mE =. ie E 7 2 ‘ . ~~ nar i ere — | 1 ox ms eee oments —______—»} FIG POWER SUPPLY EQUIPMENT aja j-ufd., 1000-volt filter cond Re tors to control filament rolte e text. " 85 turns of No. 12 d p 1 tube 00 turns of No Filter choke Fil former for UX-S Plate transformer Filament transformer for « he mestruction of the filter hoke and the transformers ret the text denser, a portion of exch of the leads being flat- ten blo ed out and drilled to take bolts to which the cking condensers are fastened. The flexible i) A Ta me Car ma}

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1930 louble- 1er the llators, on the electri- ically, m sep- itter is station ited in es (not means lament r. One switch, ie fila- oltage switch oltage trans- ie rear shows of the f the e tank h cop- diam- irectly oil and yunted ling is a coil | plate ids be- g£ con- ———ermy —_—« - 4 gz flat- ch the lexible ] 3 Iuty, 1930 leads furnished with the tube serve as connections between these condensers and the tube itself. The grid leak is mounted vertically and so placed that the leads are very short. The same is true of the rf. choke in the plate circuit the lead between this choke and the plate terminal of the tube is only one inch long. The tank condensers in both transmitters are rebuilt receiving condensers. That in the 7000-ke. set is a Cardwell, the one in the 14,000-ke. set is an Admiral. Both were originally 43-plate con- densers, and alternate plates in both stator and rotor were removed to make a double-spaced 23- plate condenser with a maximum capacity of ap- proximately 250 uufd.' The plate-spacing and of these condensers is sufficient to withstand the r.f. voltages encountered in a transmitter using the high plate voltage taken by the 852. The capacity is somewhat less than that usually considered ‘‘high-C”’ in most amateur transmitters, but it should be pointed out that the characteristics of the 852 are such that a lower C'/L ratio will give the same results far as frequency stability and freedom from ‘wobbulation’’ are concerned - much higher ratio with other types of tubes, such as the 210 and 203-A. However, high-C is only a means to an end the proof of the puddin’ is in the re- sults — and VE2CA’s signals are invariably re- ported pure d.c. and often crystal-controlled. Part of it is undoubtedly in the care used in tun- ing the sets; the antenna coupling in particular is always very loose, 8 inches or more usually sep- insulation sO as a arating the coils. OST 35 fier filaments are supplied by separate trans- formers built for the purpose, the output voltages of which are regulated by separate rheostats in each primary. The rectifier and filter occupy the compart- ment immediately below the 14,000-ke. trans- mitter. The transformers, resistors, and r.f. r \s 4 REAR VIEW OF THE 7000-KC. TRANSMITTER The mechanical arrangement of the 14,000 kc. set is similar. chokes associated with the power equipment are in the lowest compartment. The three single-pole single-throw switches on the panel at the top of this compartment break the 110-volt line to each of the transformers. The lower section of the frame is constructed of heavy material, as it has quite a bit of weight to carry. While the arrangement differs very little from standard practice for such equipment, it is of interest because the filter choke and the three transformers are entirely home-constructed. These units are therefore worthy of some description. The plate transformer is wound on a core of square cross-section with a BEHIND THE PANEL OF THE Since the rear view of the 7000-ke. transmitter vas taken, a Marconi T250 tube (rated at 250 vatts) has been mounted alongside the 852 and an be put in the circuit in place of the latter if lesired. The power output with this tube is high, ut the note is not so good as with the 852, with the result that the latter is used most of the time. POWER SUPPLY EQUIPMENT The power supply comprises the customary transformer, rectifier and filter, with UX-866 mercury-vapor rectifiers. The oscillator and recti- Recent measurements made in the QST lab on two Cardwell condensers similarly rebuilt indicate that the Maximum capacity is 205 pyufd. j-TUBE RECEIVER window 314 inches square. Each leg of the core is 134 x 134 inches. A winding form to fit over one of the legs was made of 1/16-inch fiber, with circular end pieces of the same material. These end pieces are 6 inches in diameter, and are glued to the ends of the square form. Three layers of Empire cloth were wound over the form to provide good in- sulation; 6800 turns of No. 28 d.c.c. were then wound on the form, taps being brought out so that voltages of 750, 1050, 1350 and 1700 may be obtained each side of the center-tap. The finished winding was taped by passing through the center hole and over the top until the coil was com- pletely covered, after which it was placed on the core leg and firmly fastened in place by means of small wooden wedges.

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winding is on the opposite leg, a rst being wound around the core, r end pieces installed to hold thecoil il has 220 turns of No. 12 d.c.c. tape is wound on top of the Angle iron braces hold the core OST JULY, 1930 in this case are made of brass, as magnetic mate. rial would defeat the purpose of the air gap. The choke and transformers were thoroughly coated with black Duco after finishing in order to present a neat and business-like appearance. The rheostats in the primary of each filament transformer (marked “R” in Fig, 2 are wire-wound resistor units taken from an old commercial spark transmitter. ( Three of the units, which are wound on hard rubber strips, are used in series ly with each transformer, mounted one above the other, the top one having a slider and bar taken from an old two- slide tuner mounted on it for fine ad- justment. Coarse adjustment isobtained by meansof a clip on the bottom resistor. | Three 4-ufd., 1000-volt » in series are placed on each side of the condensers IS RECEIVER FITHER PEAKED OR choke to complete the filter. The total DIO AMPLIFICATION MAY BE USED effective capacity is therefore 224 ufd., I 15-0 tor tapped at 10 which has been found adequate for giv- p a 7 head ing a pure d.c. signal in conjunction with R coil careful adjustment of the transmitter. Rs — 8-megohm grid l To prevent any r.f. which may feed R's — 50,000-ohm variable resistor. hack into the power equipment from Ri 10-0h - ses aeeties getting into the 110-volt line, a radio- RF¢ 100 turns of No. 26 d.s.c frequency choke is placed in each 110- on 1” form volt lead. A pair of 2-ufd. condensers 1’ — 10-1 aude transformer connected in series across the line, with Ss Yarley 8-spring jack tch. J Open-cire uit jack, kelite on which binding is mounted st rip serve as terminals nsformers are similarly con- r the 866’s is wound on a 14 x , 2 x 3” window. The primary No. 20 d.c.c., the secondary 16 c., the latter winding being his transformer gives 4 volts, operator to compensate for voltage, which are frequent nm. The filament transformer vound on a shell-type core, the which is 1 x 3 inches, with Che windings are placed on the primary having 550 turns of No. secondary 65 turns of No. 12 . ped. , he filter choke is rectangular, cross section with a 2! x 6-inch is removable, and the coil was ter the usual layers of Empire been put on. The end pieces oil consists of 13,000 turns of wire, with a layer of paper yer of the winding. This leg of itted directly against the other held about \% inch from it by in order to provide an air gap. ld the parts of the core in place the common connection grounded, are used as further protection from feed- back. This arrangement is of value in reducing interference with broadcast receivers operating on the same line. R.f. chokes are also provided in each high voltage lead, in addition to those in the transmitter itself. ANTENNA SYSTEM VE2CA uses the popular Zeppelin antenna, designed for fundamental operation in the 7000- ke. band, harmonic operation being used for the higher frequencies. The antenna proper is 67 feet, 9 inches long, with 39-foot feeders. The feeder spreaders are hard-rubber rods 10 inches long, drilled near the ends to fit the wire, with a longitudinal hole at each end tapped to take a 6-32 machine screw. When the screws are tight- ened the spreader cannot slip along the wire. These rods make very good spreaders, as they are mechanically strong, are good insulators and their weight is negligible. The antenna and feeders are both constructed of No. 12 enameled wire. The ends of the feed- ers are brought into the station through Elec- trose lead-in insulators inserted in a board which is placed in the window frame at the top. Con- nections between the lead-in bushings and the transmitter itself are made of copper tubing, as can be seen from the photograph of the station. Either series or parallel tuning of the feeders can be used. hi

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1930 mate- p. ughly order ‘ance. ment g. 2 irom itter nd on series | one ing a two- p ad- ained istor nsers f the total ufd . * giv- with itter. feed from udio- 110- isers with , are feed- icing g on d in 1 the nna, OO0- ‘ the ; 67 The ches tha ce a ght- vire. they and eted eed- ‘lee- hich ‘on- the , as ion can Jvzty, 1930 The antenna system produces entirely satis- factory results on both 7000- and 14,000-kce. A separate antenna, 60 feet long and 40 feet high, is used for reception. KEYING Center-tap keying is used, and a filter is pro- yided to eliminate clicks. The filter is the usual lag circuit, and the connections are as shown in Fig. 1. The choke is wound on an old audio- transformer core, following the same construction as outlined above for the filter choke, except that the air gap is only ' inch. The coil was scramble-wound and as much wire was used as the space in the core window would allow. The wire is No. 28 d.c.c. This filter is quite effective in eliminating BCL interference. RECEIVING EQUIPMENT installed at VE2CA; one, a four-tube receiver patterned after the set originally described in QS T for November, 1928; the other, a conventional Hartley with a two-stage audio amplifier. The four-tube receiver is the one on the shelf above the operating table in the station photo- graph. The ‘‘innards”’ of the set are shown in another photo. The panel is of bakelite, 7 x 18 inches, and is backed with a !/j.-inch brass sheet of the same size. The inside of the cabinet is completely lined with copper foil. The apparatus is mounted on a subpanel, with all wiring under- neath, which makes the inside of the set present a heat appearance. The plug-in condensers for various bands used in the original model of this set were not looked upon with much favor, so a “‘sliding-rotor’’ con- denser was substituted. This was made by re- building an old Silver-Marshall 140-uufd. con- denser. With proper adjustment of the sliding plate, the various bands can be spread very nicely. A 7-plate midget condenser can be clipped across this condenser for tuning outside the amateur bands. Either peaked or straight audio amplification may be used at will, change-over being effected by throwing the jack switch shown in Fig. 3. The switch is a Yaxley product, and has eight springs. When thrown to the position for straight audio amplification, the filament circuit of the UX-222 in the peaked stage is opened, thus sav- ing filament current and also lengthening the life of the tube. The Ford coil secondary in the peaked stage is placed inside a bakelite tube of the proper diameter, with a bakelite dise at the top. It is be- tween the two tubes on the left-hand side of the sub-panel in the photograph of the receiver. Coils for this receiver are wound on old tube bases. As is always the case, the correct number of turns on each coil was arrived at by experiment, and no details are given here. Two receivers are OST 37 The wiring diagram of the Hartley receiver is shown in Fig. 4. It is provided with jacks in the audio stages to permit using either one or two steps of amplification, the last jack also having filament control for the last tube. Regeneration control is capacitive. Che tuning condenser is a rebuilt Cardwell 11- OIA 4 yah — . ee - am \ | +it ot -_ mw, _, = N+ | =\- ~yY >t x] ] &; | | ; be, | + —+—> opt pp | ee he +S i ; 4 | -8 vétv~ *22 *90 FI¢ THE HARTLEY RECEIVER ( Tu enser described in text. ( bee ( -* r for regeneration ntrol I r \ i meter l f No l eter th S fur h condenser acr r R l I " * rheostat } \ 1 Amperite i I or mer J D J 0 h ent mtrol plate tandem affair, in which there are two sepa- rate sets of stationary plates. One section is double-spaced and cut down to three plates, and is used for tuning on the 7000- and 14,000-ke. bands. The other section has three plates with normal spacing, and gives good spread on the 3500-ke. band. Both sections may be connected in parallel to cover frequencies outside the bands allotted to amateurs. The coils are home-made “low-loss” type, space-wound. They are wound with No. 18 d.s.c. wire on a piece of thin celluloid which is wrapped around a 3-inch wooden form. The turns are spaced by winding No. 22 d.c.c. wire between them. After the coil is completed, it is dipped in acetone and allowed to dry, after which the wooden form is removed. This method of con- struction results in a mechanically strong coil with good electrical characteristics. The finished coil is clamped between two thin bakelite strips and mounted on an old tube base, connections going to the pins in the base. The same primary coil is used for all bands, and is clamped on a slotted bakelite strip which is mounted on a hard- rubber pillar. Coupling is varied both by sliding the slotted strip on which the coil is mounted toward and away from the grid coil, and also by changing the angle between them. This receiver is not as selective as the four- tube receiver, but is useful when static is strong and QRM not bad, because the antenna coupling can be reduced, and the signal-static ratio thus improved.

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nitor is always used for checking the he signal and the position of the the band being used. This one is tin biscuit box (on the shelf above table in the photo), and uses a in a simple tickler circuit. Three he filament, and plate supply is large 22'4-volt B battery. A ilt before we started to think in rt of the left-over 1928 equipment, * rough checking and as an aid in nding of coils for both transmitter PERATION ¢ imagined, shifting from 7000- * vice-versa is a matter of only a Either transmitter may be used by two switches and placing the the proper coupling inductance. tuning controls need be hese can be readily set at prede- The system proved its value ent International DX contest, nt oecasions a foreign station was CQ on the other band and the us made in time to effect a QSO. worked 36 different countries, in- \, Byrd’s Antarctic base, and is the \C certificate. An accurate log is tions worked, and any changes in er are noted on it. Experiments be worthwhile can thus be in- rmanently in the sets. The opera- isures are DX and rag-chewing, is never turned down. tenna w England Division Convention f spring weather ushered in the vy England Division Convention 25th at the Hotel Bancroft, The morning was sting and in getting acquainted, ladies at the registration booth signing up the delegates. reen, WIASU, Chairman of the formally opened the shortly after 2 p.m. The first Mr. E. L. Battey, Asst. to the Manager, A.R.R.L., who led . traffic meeting. Off-frequency new regulations were the big cussion. The roll call of SCMs wered by SCMs Weeks, Tessmer spoke on conditions in their ns. Following the traffic meeting, introduced Mr. K. B. Warner, L.. who gave a very interesting ssachusetts. nmittee, OST se with all really up-to-date amateur JULY, 193 talk on amateur legislation. The delegates re. ceived much information from this talk to clarify their ideas regarding amateur radio at “national and international radio conferences.” The afternoon technical talks were excellent Mr. R. 8S. Briggs, W1BVL, explained the prin- ciple of the pentode and its application to amateur use. Mr. O. P. Susmeyan described the use of the dynatron characteristic in a heterodyne frequency meter, emphasizing the stability of a dynatron oscillator. Both Mr. Briggs and Mr. Susmeyan were from the Champion Radio Works., Ine., Danvers, Mass. Prof. H. H. Newell of Worcester Tech. gave a talk on tubes as high frequency amplifiers, and clearly explained his various points by the use of an oscillograph. The evening session was devoted to entertain- ment and contests under the direction of Mr U. E. Duval and Mr. L. R. Peloquin, W1JV The usual run of contests with a few new ones worked in were ably conducted by W1JV. Two vocal artists brought the gang several selections The Worcester Radio Association presented an amusing farce on A.R.R.L. Headquarters entitled “Wanted, an Assistant Editor.”’ The Eastern Massachusetts Amateur Radio Association's jazz orchestra livened up the evening under the direc- tion of ‘‘Red’’ Cooley, W1AAO. By 11:30 every one was ready to ‘‘close shop”’ and the convention was called off until the following day, Saturday the 26th Saturday morning found the gang visiting broadcast stations WORC and WTAG and the Engineering Building of the Worcester Poly- technical Institute. The boys at Tech gave the delegates quite a treat by showing what 300,000 volts can do! At about 10 a.m. the Army-Ama- teur and Naval Reserve meetings were held at the Bancroft. Captain Lowman and Lt.-Comdr Frederick J. Bailey, U. S. N. R., gave those interested some valuable dope on the Naval Reserve and ten new men were signed up. When the various groups had returned from their visits and had assembled again, Chairman Green turned the floor over to Mr. Pratt of the R. C. A Institutes, Inc., who gave a fine talk and an- swered many questions regarding the Radio Industry, Talking Pictures, ete. Mr. J. D. Crawford, General Radio Company, brought the convention a most interesting talk on Frequency Standardization, explaining the method of check- ing the frequency of a crystal-controlled oscillator against Mean Solar Time. The usual luncheon recess was cheerfully welcomed and the delegates returned full of pep for the long afternoon session. Mr. F. H. Schnell, Chief of Staff of the Radio & Television Institute, Chicago, in typical ‘‘Schnell’’ style, described his newly developed superhet. Mr. F. A. Cowan, A. T. & T. Co., made some of the fellows realize what they are doing when they QRM GBW and (Continued on page 84) iva as a> a> 2

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, 1930 tes re. clarify ational cellent e prin- mateur of the juency natron meyan , Ine. rcester yuency “arious prtain- f Mr VAiS\ y ones . Two ‘tions ed an ititled astern 's jazz direec- every *ntior irday siting d the Poly- e the 10.000 (ma- it the ymdr those Naval \ hen their ency 1eck- lator fully pep nell, tute, ‘ibed wan, alize and Juty, 1930 OST 39 Experimenters’ Section IMPEDANCE MEASUREMENT WITH THE PLIODYNATRON By Paul D. Zottu* N the February issue of (ST, Mr. Newbold spoke of the dynatron and listed practical applications. In the same article he also mentioned the pliodynatron. It is concerning this device that I wish to add to his list another application — an application which I believe will be found very useful and at the same time replace instruments costing many times the price of the device. The pliodynatron can be used to measure the r.f. impedance of a tuned circuit. For this type of work it is probably some FIG. 1-A by far the best instrument at the disposal of the amateur. I have used the device for nearly a year and have found it a most indispensable instrument It is well known that a circuit made up of L, C, and R, with the elements disposed as shown in Fig. 1-A, will oscillate when it is connected in parallel with a negative resistance equal to the effective impedance Z of the tuned circuit. The impedance of the tuned circuit at resonance is L RC pliodynatron can furnish such a negative re- sistance. The negative resistance of a pliodyna- tron can be varied in a number of different ways, such as by varying the screen grid voltage, con- trol grid voltage or filament emission. Observa- tions have shown that it varies approximately as the inverse of the cathode current, or expressing the same thing mathematically, - (1) T le * 10 W esleyan Place, Middletown, Conn. ! The Dynatron, A. W. Hull, Feb., 1918. equal to It has been shown! that the where K is a constant depending upon the char- acteristics of the tube and the particular condi- tions under which it is operated, and r is the negative resistance of the device In order to determine K it is necessary to obtain a few curves showing the relation between /, and £, for different values of /,. In taking these curves the control-grid and screen-grid voltages should be kept constant. The control grid bias should be of such a value that approxi- mately the desired value of anode current is obtained when the filament is at three volts. The data from which the curves of lig. 1-B were drawn was taken with no bias on the control grid, which resulted in a wide variation of K for Curve III. The screen grid voltage for a Type ’22 tube may be as high as 75 volts positive. For a given value of /, vary /, and note /,. If accuracy is desired, 2, should be varied in small ar t , os ooo FIG. 1-B steps, such as two or three volts at a time. A sufficiently sensitive plate-current meter should be used in order to give readable plate current changes. The circuit used for this purpose is given by Fig. 1-A, with the exception that the tuned circuit is shorter. When this data is plotted, curves similar to those of Fig. 1-B will be ob- tained. With some tubes slight undulations may appear in the curves Choose on these curves a value of #, about which the curves appear to be straight. Deter- mine the slopes of the different curves for this particular value of E,, substitute the value of the and J, in Eq. (1), and calculate AK. K is calculated for all of the curves, and the mean value is taken as the value to be placed in the equation. The curves of Fig. 2 give values of slope K,=81.1, K,=74.8, K;=50.8. K1+K2+K3 a = 68.9. 3 Value of slope is equal to r. — Eprror.

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I r this particular tube now stands 68.5 2) le he impedance of a_ parallel- connect the combination in ite lead. Set £, at the value for ulated, 20 volts in the above ry /, by varying the filament RO oscillations will be set up se oscillations can be detected he sudden change in the plate ning for a beat note in another he value of J, at which oscilla substituted in (2) and r is value of r is also the value of nee of the parallel circuit of choke approxi- ral period can be determined in manner. The plate to screen the tube is approximately 12 effective across the coil. For factor coils at pacity this becomes a re glected NUSUAL R.I W6DOI, of San Diego, Cali- great deal of time experiment- es, and has finally arrived at a s to be ‘“*holeproof”’ over the range from 200 ke. to 28,000 ke in his own words: r.f. chokes, after having been nd again, is, as far as I am able Hmooooo CHOKE FIG the same direction, with No. 28 é slot are as follow Slot No. 6 R31 turn ¢ lol t hot end of the choke, No. ? as hazy, elusive, and unsolved see a Hartley-circuit grid dip constant frequency change s to less than 100 ke., with con- | without holes? This undoubt- our mind the subject of rf. ter is more than a possibility as of one, designed and built years ago I undertook a study of heir action for my own edifica- OST JuLy, 1930 tion, and after endless experimentation and meas- urements incident thereto, evolved a_ theory which to date seems to be watertight, and pro- vides chokes for any frequency up to their overall fundamental frequency — which may be so low that it is of no practical consequence from a radio standpoint “This system consists of a series of pie-wound sections on a straight-line form, with determina- tions of component sections as follows: Section at load end — resonant period approximately one- third of signal frequency; the inductance, ex- pressed in m.h., to be a prime number; next see- tion construction, except inductance value prime and resonant at one-seventh of sig- nal frequency, spaced on the form in such a man- ner that the mutual inductance between the two sections is not greater than one-half the induc- tance of the load section; these are followed by five other sections of the same coupling, but each maintained in prime inductive relation to every other section in the choke. Wire size and dimen- sions of the form will necessarily be governed by the load requirements of the d c. circuit to be fed “Applying this theory to ham use, unless you are possessed of more rapid methods of calcula- tion than I, entails a vast area of paper and a number of good pencils, together with quite a lot of patience. However, I have found that a much more simple method of calculation, and one that works with entire satisfaction from the ham standpoint, may be used. This has been proved to my satisfaction by risking my thermo-gal- vanometer, tightly coupled to the outside end of my choke on a 4-kw. oscillator while it was con- tinuously varied in frequency from 28,000 ke (the highest frequency at which it would oscil- late), to 200 ke., with a maximum deflection of less than 1.5 m.a. over the entire frequency range “The amateur version consists of coupling the sections on the form not closer than 114 times the mean coil diameter, and maintaining the number of turns in each section in prime relation to each other. I have built and used hundreds of these chokes since the original design was evolved, and have found an invariable gain in efficiency when they have been used to replace other chokes of whatever type or design. “A sketch of the usual choke used in any r.f transmitting circuit intended for power outputs of less than 14 kw. and frequencies of 500 ke. or more is shown in Fig. 2.” ~ Same A PANEL SAW The chap who gave birth to this idea is too modest — or sensitive — to let us mention his name. In spite of this deprecatory attitude, how- ever, the gadget is a handy one for taking care of a mean job, namely, sawing panels. How many of us have wanted to saw through a foot or so of sheet bakelite and wished the hack- cou and S alw: adv: for VE4 hase of tl Sma well T proc both for a p away ing | hole: othe avol TI

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und ina- n at one- eX- ince sig- an- two due- l by ach very nen- 1 by fed you ula- id a i lot uch that ham ved gal- d of con- ke scil- n ot ncy the : the nber rach hese and ‘hen s of r.f puts ‘or too his LOow- ce of ugh uck- Juty, 1930 saw manufacturers had been a little more gener- ous with the space between the brace and the blade? Well, why not make a special saw for the job? [he only materials necessary are three pieces of wood, a hacksaw blade, a few feet of wire, and some nails. It’s as simple as the accom- panying photograph The wood pieces used should be heavy enough not to bend when the saw is in operation, and the distance between the saw blade and the cross piece must be sufficient for the job in hand. Ten- sion on the blade is regulated by twisting the wire after the manner of a turnbuckle, a heavy screwdriver being the ‘‘twister.’”’ As a matter of fact, if a ‘‘high-hat”’ job is wanted a turnbuckle could be placed in the wire, and the whole thing — _ | ———_ ————— = - A PANEL SAW could be dressed up a bit. One made out of odds and ends works just as well, however. A HANDY WAY TO LAY OUT COILS Since the coils for an amateur-band receiver always have to be made to order, it is quite an advantage to have a coil form which can be used for experimental only. Bob Chipman, VEAIC, of Winnipeg, Canada, took an old tube base and mounted four binding posts on it, each of the posts being connected to a prong inthe base. Small machine screws and nuts will do just as well. A sketch of the idea is shown in Fig. 3. This base is used only during the cut and try process, and after the proper number of turns for both tuning coil and tickler have been determined lr any particular band a separate coil is made up in permanent form on another base. This does iway with the bother of soldering and unsolder- ing wires in the pins, pushing the wire through holes in the base each time a turn is removed, and ther time-wasting maneuvers which cannot be avoided unless a special base such as this is used. The device has another advantage, because coils OST 41 other types of coils which will not fit in the pocket in a tube-base coil receiver may be tried out by = =—~ ? an | ——— simply running wires from the coil terminals to the binding posts on the base. ELIMINATING KEY CLICKS We should very much like to think that the key-click problem has been solved to everyone's satisfaction, but unfortunately it hasn't. Thumps very often refuse to yield to rational treatment, much to the disgust of both amateur and B.C.L, and then sometimes a simple stunt will be hit upon which restores peace in the neighborhood While the methods described below may not fall in this class, they have been successful in each in- dividual case, and will be worth a trial, whether or not other means have failed. Robert T. Foreman, W9ZZE, of Tucson, Ari- zona, had a lot of trouble with an a.c. broadcast receiver, and after trying all sorts of thump fil- ters and wave traps, finally resorted to a filter in the supply line to the broadcast receiver. When this filter was installed, the clicks could no longer be heard The wiring of the filter is shown in Fig. 4. The inductances are old Ford spark coil primaries, and 005 ufd. each. The filter is placed as close to the receiver as possible — in this case it was mounted in the same cabinet. If the condensers are >= —$$—$__— C= l A¢ ——— Recewe , : —— = 2208 — —— | - 5 a , | L FIG. 4 L Primary of For ark coil (vibrator mu orted out if primary ts not removed from coil assembly & 006 pid. compactness is wanted, the primaries can be re- moved of course from the coils. When the key is placed in the primary of the plate transformer there is usually not so much trouble from clicks caused by a steep r.f. wave

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reaking the primary current gives the nan a.c. receiver as turning a lamp on ne on or off. An arrangement which he spark at the key thus serves the ose of reducing this effect and saving tacts. W SAQ, E. H. Gibbs, Wads- , had this trouble, and found an inex- tion for it es are placed on each side of the key, condenser is shunted around them. ser absorbs the spark, and the chokes any high-frequency currents which \ diagram of the arrangement is FC g RFC TAREE —™ + ——. LAER 2E —_—_—__—e - —{}+— ov eo~ i. EE - _ — —E FIG. Vo. 24 d.c.c. on 1-inch form. Larger the transformer draws more than about es must be wound with wire which is igh to pass the primary current of the nsformer without too much voltage drop. urge enough for a set using a single Type Higher powers will take a proportion- er wire s1Ze. Gilbert, W2BBP, also had some trouble ind eliminated them by using the cir- in Fig. 6. It is a somewhat unorthodox irrangement, but W2BPP says he has ible with clicks since using it. bable that a great deal of the success of ment of this sort is dependent on the nt of the transmitter, as is the case with usual lag circuit. With different trans- istments, different values of both choke nser will prove most effective. A little nting is therefore needed in order to get yssible results ANCE BRIDGE IN THE APRIL ‘X”’- SECTION il Moll, Toledo, Ohio, has called our to the fact that the fundamental equa- resistance bridge given on page 47 issue were set up incorrectly. given as E.=1,R.=1,R; E,=1oRe=1Ro ve been kes no difference in the final result, because the inequality disappears as OST JULY, 193) soon as the /R drops are put in the form of, ratio. The statement that R.=R, (R/R,) i therefore correct. Mr. Guy A. Simmons, Jr., of Little Rock, Ark writes as follows regarding the bridge: “It might be well to bring out that this type bridge will be accurate only when non-inductiye resistances are being measured. Other resis. tances are accurate at the frequency of the buz zer being used. ‘*A refinement which would make the tone ob. tained from the buzzer smoother and prevent the it a RFC $ GLs J He Hi Cc FIG, 6 L— 30-henry B-eliminator choke. C — .003 pfd. bridge from affecting the tone of the buzzer would be to place a large fixed condenser in one of the leads from the buzzer to the arm of the bridge. This would also tend to prevent sparking at the contacts of the buzzer and prolong their life. This condenser should be fairly large, 1 mike or so, in order not to appreciably attenuate the current sup plied to the bridge by the buzzer. The condense used does not have to stand high voltages and could be any low-voltage receiving condenser “Many school laboratories use a modification of this type of bridge in which a meter stick with a section of resistance wire stretched its lengthis used. A fairly high resistance (per foot) wire must necessarily be used. The connections are the same as those in article by Mr. Whitacre, although a battery and galvanometer are usually used.” ” A NEAT “CLIP” FOR TRANSMITTER COILS A new use for the National “Grid-grip” & suggested by WICRC. It makes an excellent “clip” for a copper-tubing transmitter coil, fitting the 3/S8-inch size snugly, and can be squeezed together a bit to fit 14-inch tubing The idea is illustrated in Fig. 7. The grid-grip should be slipped on the coil be fore the ends are flattened to make connecting lugs. A piece of flexible wire of the required length is soldered to it, and the other end of the wire is soldered in a phone tip. The tip is plugged into a tip-jack, which may be mounted per manently in the transmitter. — i a oe ee he tic

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y, 1930 rm of 4 ) R,) Ny *k, Ark 3 type of ductive 4 resis- the buz tone ob- vent the pr would e of the » bridge g at the ife. This or so, in rent sup- yndenser wes and ndenser ification ick with length is ire must he same hough a used ILS grip” is >x cellent er coil, can be tubing - coil be- nnecting required d of the plugged ed per Juty, 1930 In this manner it becomes possible to change coils in a Hartley transmitter, for instance, with- out readjusting the clip the next time that partic- ular coil is used. The ’phone tip and jack are used simply for convenience a binding post would serve equally well, although a little more time would be needed to make connections. The grid-grip makes a good connection — better than an ordinary clip — and in addition has no iron in it. Ordinary clips are usually made of iron or steel and then plated with copper or nickel, and get quite hot even with a low-power set. Unnecessary | p> Phon elip E- lip Jack FIG. 7 heating means an unnecessary loss of energy which might better be expended in useful radia- tion A FLEXIBLE RECEIVER By A. E. Harrison* HE receiver described is not radically new or very different from most ham receivers, but several ideas have been combined to make it flexible and yet not compli- cated or expensive. No photographs of the re- ceiver are available, as it has been changed from time to time as different ideas were tested The tuning inductance is a variometer. It covers either the 3500-ke. or 7000-ke. band by changing the position of the rotor. The stator has 12 turns, a coil of 6 turns on each side of the shaft, on tubing 2 inches in diameter. The rotor sa short UX tube base with the prongs removed and also has 12 turns. The tickler has 6 turns on both rotor and stator. It is wound next to the shaft with No. wire. This makes an dficient. tickler winding but occupies one tenth % much space as larger wire. As shown in the photograph, the variometer was mounted on a 9 tube base in order to replace the tube-base coils formerly used, without changing the set This variometer is not completely satisfactory, 8 it does not include the 14,000-ke. band, and the oscillation control must be changed when thanging bands. With an equal number of tickler urns on the rotor and stator, more detector voltage or feed-back capacity is required to fuse oscillation as the frequency is increased. 36 d.s.c *W6BMS, 163% ) Buena Ave., Berkeley, Calif OST 43 This might be remedied by putting more turns on the stator than the rotor or vice versa. A variometer covering three bands may be designed Plate B+ TOM Grid Fil FIG. 8 WIRING Of THE VARIOMETER If all co are wound the same direction the connections ld be made as shown. Further details are given in the text with the rotor and stator closer together, using a rotor turned on a lathe and form wound stator coils The midget tuning condenser is a rebuilt ‘“ Pilot” The stator plates were removed and a _— eee THE \ ed 1RIOMETER portion of one side filed out. This gives the receiver a tuning curve that is nearly straight- line frequency. Three plates were assembled on the stator, then the two screws were cut with a hacksaw about ;s of an inch from the third plate. Threaded bakelite bushings 14 inch thick hold the three plates in place and allow two more plates to be assembled on the stator but insulated from the other three plates. The rotor was not changed For 3500-ke. operation five stator plates are used, spreading the band over 50 dial divisions. Only two plates are used for tuning 7000 and 14,000 ke. A switch should be arranged to add the

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ree plates to the circuit when tuning gram of the receiver, Fig. 9, a Type vn as a volume control. It is semi- action, reducing volume on loud allowing weak signals to come in at full strength. Another advantage of | is its action on key clicks from the ane +90 +¢@V- THE COMPLETE RECEIVER ribed in text enser described tat tat we choke. sformer. Che shock to the detector is re- the key is pressed, allowing better peration. It would probably reduce the from a nearby station; however, this een checked as operation recently has the 3500-ke. band and no other is neighborhood seem to be using ymplete shielding of the receiver his control more effective. Ge Strays “Hy Electrical Instrument Company, St., Chicago, is publishing a neat nversion chart which is a handy radio shack. It is similar to the one QST some months ago and in the nd it is possible to determine the art of the world corresponding to ¢ time. Provision is also made for find- r the time indicated is for the same Che chart is being distributed free of ean be obtained by simply addressing bove address. experimenting with television and cells will find much to interest them OST JULY, 19% in ‘‘ Photo Cells,”’ by D. E. Replogle, published by the Jenkins Television Co., 346 Claremont Aye Jersey City, N. J. The booklet explains the actigy of the various types of cells and gives considerabk data on circuits and characteristics, together wit information on photo cells marketed by the Jen. kins organization. It is in loose-leaf form, an supplementary sheets will be issued from time t time. The price is twenty-five cents Most amateurs are addicted poring over catalogs, and one of the best we have seen recently is th “Catalog and Data Book,’’ publishe by the Offenbach Electric Company 1452 Market St., San Francisco. 4 the name indicates, there is much mor in it than just prices on manufactured parts. The book has 370 pages, divided into emhteen sections, each dealing with a class of apparatus, such as con densers, resistors, meters, amatew transmitting and short wave equip ment, panels, etc., and with each see. tion there is a great deal of design dats and generally useful information on that particular subject Nearly all standard brands of ap paratus are listed in its pages. The book is well printed on good pape stock, and is well worth the dollar charged for it. It is a handy reference book to have around the station. If You Buy “ QST” On the Newsstand— Perhaps you haven't previously seen the Communications Department section with its operating news. This section of the magazine, with its news on the practical activities of amateurs all over the country, including your own locality, appears in newsstand copies only during a couple months in midsummer. Normally it is an extra section of 16 pages bound into only those copies which go direct to members of the A.R.R.L. If you are interested in these informa- tive operating articles and the chatter of local news everywhere, it is one additional reason why you should join the League and have the membership edition of “QST” delivered to your door every month. See the convenient application blank on page 94. hor ‘on ino Bur iS) an pub

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ished by mt Ave 1€ Action siderabk her with the Jen. rm, an ) time ti cents cted e of th is th ublishe om pany isco. As ich mor factured , divided dealing | AS COD amateur » equip ach see. ign data tion oD of ap The 1 paper > dollar eference mn es the with the tical itry, s in uple S an only bers ma- r of onal ue of yery tion Juzy, 1930 * a Devoted to the interests and activities of the INTERNATIONAL AMATEUR RADIO UNION sident: H. P. Maxim Vice-President: C. H. Stewart Secre Kk. B. W ER Headquarters Society: Tue AMeERIcAN Rapro Retay Leacve, Hartford, Conn. MEMBER » Relay League American Rad Asociacion E. A. R Associazione Radiotecnica Italiana Canad Section, A.R.R.L Deutscher Amateur-Sende-und Empfangsdienst Experimenterende Danske Radioamatorer Nederlandsche Vereeniging voor Internationaal Radio- amateurisme SOCIETIES New Zealand Association of Radio Transmitters Norwegian Radio Relay League Society of Great Britain Radio Reseau Belge Reseau Emetteurs Francais South African Radio Relay League Wireless Institute of Australia Conducted by Clinton B. De Soto ITH this issue of QST the task of ac- cumulating and compiling the material which appears regularly in this depart- ment falls into new hands. No peroration or lengthy announcement of this change is necessary or desirable, since we are all chiefly interested in the news itself as herein published — not in the personalities behind that news. We hope mainly to retain that fine degree of real, spirited interest in the information contained in the department which has been evinced by so very many amateurs from all parts of the world. We hope the high standards of fullness in detail, f promptness in preparation, of accuracy in which have governed the contribu- tions to these pages in the past by many valued ontributors will be maintained and appreciated y all concerned. C. 2. statement Miss Barbara Dunn, G6YL, again contributes mother change of address by a QSL Forwarding Bureau. The present address of the Hungarian ISL Bureau is as follows: M.R.A.E., I. Zirken inka, Utea 14/B, Budapest. This will correct and supplement the general list wublished in the November, 1929 issue of QST. A brief Chinese report carries the information that the power input allowed Hongkong amateurs 310 watts. They are licensed to work on the 7-, lt, and 28-me. bands. The regular June Calendar of the I.A.R.U. wll have been sent out to all the National Sec- tions just about the time that this issue is pub- lished. Another society is being proposed for membership, the Rede dos Emissores Portuqueses; it is hoped that it will not be long before this organization is welcomed into the Union. Duly representative national amateur societies which may wish to affiliate with the I.A.R.U. are invited to communicate with the Secretary, at 1711 Park St., Hartford, Conn. We have received here a good many DX Time Tables which are of value mainly in a very re- stricted area, and we haven't felt them generally useful enough for publication. If any one is inter- ested in tables for special places and regions we will be glad to give whatever information we have on file. (For example we have a very fine report on Porto Rico and vicinity only. To the K group living there and others interested in working into there it would prove invaluable.) We will be only too glad to answer any inquiries. AUSTRALIA By Alan G. Brown, VK3CX Much activity was shown here during the tests; mainly on 7-me. band, since the 14-mc. band did not come up to expectations in regards to contact with the U. S. A. Most of the chaps engaged in the tests have the same growl, and that is that there weren’t enough W stations participating, beeause about one in every two stations worked didn’t have a test message. Some very fine totals

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n + but as yet we don’t know who will rian Division of the W.I.A. has their fine shape now and a loan library truments and radio books which is a members who want to make certain nd yet don’t want to buy all the ts necessary. Club Division of the Institute is ne work out at the Essendon Aero- king consistently plane to ground wer plane sets. The ground station perhaps the most up-to-date station in \ustralia. The small plane transmit- yn the bottom edge of the 42-meter the call VK3WT has been heard at iles away when the plane was in the nput of only 3 watts. erstate divisions of the W.I.A. have tions on the air regularly now. The VK2WI, VK3WI, VK4WI, VK5WI, VK7WI. Practically all are crystal- 1 they handle much of the Institute saving much correspondence and visions closer together. t-me. band a few of the old-timers and ums are all out after DX and at pres- lenty of it. With inputs ranging from ts they are working all continents regu- tle trouble. BELGIAN SECTION | de Neck, Pres., Reseau Belge period seems to have come back on und, and every day, from 1700 to 1 fierce traffic is being carried. New d Aussies come first, together with \frican and Rhodesian stations. the great lot of U. S. hams from the d 9th districts literally cover the ome the South Americans, mostly with a few CX and CE. We can ur good friend CE7AA, who came w days ago. records to be listed: his 14-me. ‘phone received in Aus- ON4UU made their first Japanese eved his code WAC in gne night. e his first U. 8S. A. contact with only # ne. band the regular traffic was tween European stations and a few ith 40 watts input on 7 mc., was phone in Europe with a regular ith sadness the sudden death of one friends in Europe, SUSAN, Mr. OST JULY, 193) Nahmias of Cairo. He was certainly one of th best known amateurs in our country, and the firg DX made by a lot of us in our first attempt quit the continental area. Many ON’s had good chats with SP3YL ané SP3KYL. We know now that these stations ap owned by two young girls, movie stars of their own country. Splendid! Hi! Our SP friends tell us that there are six YL’s ip the L.K.K. gang right now: SP3HR, SP3ER SP3LA, SP3HB, SP3KYL, and SP3YL. Let y try to get them on the ‘phone sets, OB’s! Now, could we say something about the new WAC Certificates? Why not register and classify ar Ss | r VSEAG, THE STATION OF J. J. ALVAREZ. 6 CAM. ERON ROAD, KOWLOON, HONGKONG. THIS STA. TION FIRST CAME ON THE AIR NOVEMBER 1929, AND HAS SINCE WORKED ALL CONTINENTS AND 22 COUNTRIES, WITH A TOTAL OF 1K STATIONS The transmitter uses one Type 210 in an Ultraudion hookup The transmitting antenna is a voltage-fed Hertz, as described by Mr. Windom in QST for September, 1929. The receiver is an ordinary Schnell detector and one-stage audio using tub base coils. these certificates at the date of receipt of the last QSL ecard bringing their proofs? It would be much more correct than the actual method of listing them by the time of their delivery. For the old ones, our friend Mr. K. B. Warner could ask the national sections interested to send a paper giving again the said date, after which he sends back a small label with this date written on together with the I.A.R.U. seal and his sig- nature, the label to be affixed on the WAC certificate by its owner. The preparations for our July International Amateur Congress are going strong. We have the official authorization to install two 100-watt ‘phone and code sets, one in Liege and one i Antwerp, working in the 40- and 85-meter bands during the period of the exhibitions. In regard to the suggestions regarding the dating of WAC Certificates as advanced by Mr. (Continued on page 66) *y

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193) - of the the first -mpt ti YL and ions are of their YL'sip SP3ER Let us he new classify 6 CAM. ‘IS STA- [BER VENTS OF the last e much listing W arner to send hich he written his sig- WAC ational ave the K)-watt one iD ‘ bands ng the vy Mr. Juty, 1930 epartment, F. E. Handy, Communications Manager E. L. Battey, Asst. Coms. M¢r. 1711 Park St., Hartford, Conn. Your Log By Eugene A. Hubbell * “OA4J, why that’s funny, I don't remember calling him. Let’s see, he says ‘Sorry you didn't hear me come back to your call. Your signals very nice, QSA3, here.’ I wonder what the log-book shows for that night.” The log-book showed nothing in the way of operation for that night. So our *‘ ham” friend went in doubt the rest of his days as to whether that card really belonged to him, or to another station. The up-to-the-minute station owner could tell in a minute whether he had called OA4J that night, and would be absolutely certain as to whether the card was rightfully his. A log-book is usually found in every amateur station, but in how many logs can an entry be found of a call not an- swered, a C€) without replies? Few keep a record of these ransmissions, yet it should be done, IF THE LOG IS TO BECOMPLETE! A complete log is the careful record of all transmissions from the station to which it belongs, with associated data. The Federal Radio Commission has adopted new amateur regulations which make it imperative that every station keep such a record. A log-book furnishes a record of stations worked, all, with date and time. first of Then it should give the frequency or Date T ime Called QsSO QSL M 6-1 0010 HCIFG Cc 6-1 DC 6-1 0030 CQ N 6-1 0040 lest §-1 0100 WSBHZ N frequency band, on which the station was worked, and as required by the F.R.C., the input power to the final stage d@ the transmitter. It should also contain a record of tests wat, when tuning the transmitter, providing the antenna vas coupled, also all unanswered calls and CQs. Optional items are records of signal strengths, weather,whether QSL vas sent or received, traffic handled, etc. it should be com- paratively simple to keep and entries should be easily made Asample form for such a log is indicated herewith. The first entry records the working of HCIFG on June 1, st0010 GMT, the C under QSO indicating contact was made ind a QSL was sent the same day. Under signals the station alling received a report of DC, QSA4, while HC1IFG's sig- tls are given as RAC, QSA4. The weather was rainy, aput to the transmitter was 45 watts and the frequency was the 14-me. band. A letter can be used to indicate the band, Afor 1750 ke., B for The signal reports may ve cut to a few indicating letters and figures, thus: AC, RAC, NDC, DC for corresponding modulation, or lack of nodulation, on the signal, while simply 1, 2, 3, 4 and 5 3500 ke., ete. idicate the degree of reliability or signal strength (QSA) tad the audibility (R1, etc.) if asked. Under the QSO col- wuma,' C and N are international abbreviations for “yes” ‘wo IERU, 227 N. ith St., Roc ry Ill. OST 47 and ‘‘no,"’ consequently their use fixes their meaning more firmly in our minds, and shortens the work considerably. The second item records a CQ which went unanswered, but which might possibly have been heard and answered, although the sending station did not know it. If a card mes in from Himalaya, Timbuktu, or Java, one can immediately verify the transmission. The third entry records the transmission made while tuning the antenna circuit after a QSY to 7 mc. Too many times a station tunes up the antenna circuit and sends test for minutes at a time without signing. When through testing, SIGN YOUR CALL signal. The fourth item records a call which went unanswered again. However, it furnishes valuable information. Perhaps some Official Observer sends you a card saying you were heard off-frequency on the 7-mc. band June first, at 7:00 p.m. CST, calling CQ. Your log at once furnishes the infor- mation you were transmitting at that time, but that you were NOT calling CQ. Information of this kind may prove to be very valuable in saving your license, for the time is near at hand when off-frequency transmission will meet prompt punishment. It is up to each amateur to dope out his own system. This gives an idea of the writer's conception of a complete and ate log, that may be kept with a minimum of. work, recording every transmission. Whether you use this form or accul His Remarks Inputt Freq.t RAC4 rainy 45w 14 me 45w 14 me t QSY to 60w 7 me. 7 me XDC4 60w 7 me, another, keep a complete log, and mark yourself down as operator of a truly modern station operated systematically and legally in every You will find the record valuable on many occasions. WDDE Paul K. Davis of Chicago (W9ADU) will operate WDDE this year, and he plans to contact amateurs on 5555, 8330 and 11,110 ke. The expedition and MacMillan's schooner Bowdoin set forth in mid-June. The party will visit Lab- rador, Greenland, and Iceland. Jenkins and Adair, Inc., of Chicago have built the new high-frequency equipment for WDDE About the time this notice appears in print we expect to be able to include later and more specific information in telegr: aphix broad asts from Headquarters concerning the respect. tA suggestion to eliminate the necessity for columns for the frequency and input power is to write a statement in- cluding both these items across the whole page, opposite the h time the change is made to 7 —¥ ent trans- itter or different operating frequency .H. ‘C,W,and H are often used to denote “called,” or “‘heard”’ respectively. — F. E. H time entry, ‘worked”

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operating hours of WDDE. Davis asks in handling this traffic through general and schedules with the stations that prove x j r WDDE « all bona fide expedit 3 We must look f nels (where nd do the usual good communication WDDE and help all you can! Traffic Briefs 14 me. W1AMQ contacted 40 states, Canadian fourth district, four continents es. FB! s the ‘Oriental’ extends from Paris ghai, China, and is lined up as follows COS-WSYA-W3BI W2ZC is trans- r the route and completes it to England, raffic for the Orient is cleared through s route functions daily and at this st reliable chains sked East beats a CQ East by about s of Klamath Falls, Oregon, was a Mother's Day greeting by ama- » is stationed at Tientsin, China. ered the message, says that the letter of th Mrs. Adams sor whe anks he received from that deliveric ant! realize f the combined Battle Fleet and Scout- terminated maneuvers for a recreation rts of the West Indies, amateurs in the Island section saw an opportunity to i lots of it. KAKD at St. Thomas, V. L., re of NBB, got most of it as the majority at port. K4A KV at Ponce had three rt. K4KD, not being at a port of visit, the commander of the Scouting Fleet ties of his station for message service to he commander forwarded the invita- er ships, and some 100 messages were D as a result. KAKD handled most of his with WIMK and W2FN D his traffic on schedule. At one time essages in a string from K4KD, and on k 52 in a row. On different occasions 84 and 108 in a string. All traffic was band. schedules OST JULY, 193) K4KD tells us that a very fine time conversion chart fg the DX man is obtainable from the Superintendent of Doc. ments, Government Printing Office, Washington, D, ¢ This is known as “Standard Time Conversion Chart miscellaneous publication No. 84, and may be procured g 10 cents per copy, cash only, no stamps accepted. W9CSR received the first Amateur Extra First ticket issued in Colorado W9CKQ and VK5HG have a total of 365 QSOs to date their schedule having extended over a period of a vear and a half! They are at present engaged in handling traffic to Washington, D. C., for the Magnetic Observatory of the Department of Terrestrial Magnetism, Carnegie Institute at Watheroo, West Australia. The route is VK6M0O VK5HG-W9CKQ-mail, We wish to report the foll with the (¢ Squadre« n and return wing brief sketches of amateur National Guard 115th flight from Hartford, Conn., to At Hartford WI1MK was on the at Jacksonville handled a number of messages cooperation onnect it Observation Miami, Fla., job. W4MI and reports for the fliers and entert stay in that city. The Miami Ar with them by 1ined them during their iteur Radio Club sent Western Union to W4AGR at Tampa for relay, as all of their stations were tied up in ion with their codperation at the All-American Air WSDBK, WSDSN and WSQU were on the job at Dayton to take care of messages that the Squadron wished to send from that city. At Cleveland WSACR and WSBF cooperated. messages filed connect Races Traffic Summaries APRIL-MAY Pacific led by Los Angeles 12,029 \tlantic led by Western Pennsylvania 2952 New England led by Eastern Massachusetts 2316 Hudson led by Eastern New York 1982 Central led by illinois 1827 Southeastern led by Florida 1566 Midwest led by Missouri 1457 Dakota led by Southern Minnesota 1443 West Gulf led by Northern Texas 1115 Northwestern led by Oregon . 788 Delta led by Mississippi 553 Roanoke led by Virginia 247 Rocky Mountain led by Utah-Wyoming . 1 Quebec . 123 Vanalta led by British Columbia es 103 Ontario ; 90 Prairie led by Saskatchewan 60 586 stations originated 7042; delivered 6190; relayed 15,554; total 28,786. (SS del Los Angeles retains its hold on the Banner with a total of 3186! This can't go on forever! ! The Traffic Banner goes each month to the section with the largest total of real messages. A traffic summary showing the standing of the various divisions for the past month is printed above What place does yours take? What Section will carry the Banner next month and help its Division head the list?

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; 193 chart fe of Doey. D.C Chart ured at st ticket to date, year and raffic to vy of the nstitute K6MO. amateur 115th nm 4 s on the ng their lub sent V4AGR “d up in ican Ar e job at 1 wished | WSBF 2,029 2952 2316 1982 1827 1566 1457 1443 1115 247 135 19 es) 103 QU 60 relayed a total er gves or re of the ab« ve rry the st? Jury, 1930 , BRASS POUNDERS’ LEAGUE Orig é Rel Total 180 213 74 R6A7 78 122 60 S60 154 114 90 R58 121 Ss 4 723 109 259 0 668 24 25 196 5 113 138 SO $10 9 79 B55 193 130 276 47 $53 3 l ) ORS $38 31 6 i4 $31 164 236 4 t4 279 $2 SO l 64 25 204 , $1 6 SS 38 156 1S 74 23 17 2 262 ll 17 ) 250 7 iv ) 252 1 t 27 iS ) re | 16 7 7 7 248 2 ) 248 1 7 218 j 80 104 ) 78 7 22 23 S 36 217 6 66 is i70 SS 4 14 166 3 l SI 163 2 6 5 162 ) 2 47 154 S 2 2 142 1) 7 26 123 20 > ti) lil 16 1 6 103 15 ) 15 So , 61 10 S6 I several teur est ble f e hest fe work he esti . ae g the pace , hw hile fT ndling ¢ ted right » me p of B.P.1 cures g ng the « t g of « h mn i y All ox e Brass Pour rs gue € it schedule-Kecping i dependat work in mateur vecial n to the following s in ti } for . one ed delirerte n the messag tr W6HM WEWA, W9COS, W2QU, KAIDJ r, KALIHR WSYA, WSWW De eries « nt! A l of 2 P more } 1 fide ges dled nd nted vecord e with A.R.R.L. I tice, « t more delireries will put 1 in ef lace e B.P.L. Why not make € edules w he re ble stations you hear and e atens » hanadl he traff t will q fy u B.P.1 ! t st excellent outlets for Nicaraguan traffic are W2QU and WYBCA. W2QU handles an average of nth on regular schedule with nf in) essages per NNINIC He mails a py of each message received to its lest t rnot. W9BCA n whether relay is made by radio up four nights a week. He can WI1MK Headquarters’ Station W1MK operates on reque es of 3575 ke. and 7150 ke. Robert B. Parmenter, tI s the chief operator: his fist is familiar to most of he a auteur fraternity. ©) usionally other members of the Headquarters’ staff operate at W1MK. Their personal signs ay be found in the QRA Section of QST. Throughout the following schedules Eastern Standard iime will be used OFFICIAL AND SPECIAL BROADCASTS are sent it the following times § ” Sun., M Tues., Thurs., and Fri. OST 49 GENERAL OPERATION periods have been arranged to allow every one a chance to communicate with A.R.R.L. Headquarters. These general periods have been arranged so ! broadcast. They are listed inder the two headings of 3500 kc. and 7000 ke. to indicate hether the watch is devoted to listening on the 80-meter band or to the 40-meter band. that they usually follow an off 3500 ke 8:10 p.m. to 9:00 p.m. on Sun., Mon., Tues., Thurs., and 11:00 p.m. on Tues. and Thurs. (No OBC sent before these peri ds 12: p.m. t 1:00 a.m 10:00 p.m. t or later) on Sunday night (Mon- 7000 ke. 10:10 p.m. to 11:00 p.m. on Sun., Mon., and Fri. 12:00 p.m. to 1:00 a.m. on the following nights (actually of the day following Mon., Tues., Thurs., and Thurs. does the OBC precede SCHEDULES are kept with the following stations ec will travel expediently to \.R.R.L. Headquarters, on 3500 kc.: WIACH, W1IBXB, WIZA W2JF, W3BWT, W3CBT, W3ZPF, W4PM, WSCEO, W9OX, VE9AL; on 7000-ke.: W4SK, W6CIS, WODEP and W60J through any of which traff ELECTION NOTICES é ré r in the Sectior listed below: eceipt of nominat- of the present in- es the Sections, closing date tion Manager, the n ite of expiration of his term of office.) This 1s notices In cases t alid nominating petitions have been re- ved from A.R.R.L. members residing in the different Sections sponse to ou revious notices, the closing dates for receipt f nominating petitions are set ahead to the dates given here- ons r Sec t and the « th. In tl of nominating petitions from Members of a se n, t neumbent continues to hold his official yn n the work of the Section subject. of course the filir r nominating petitions and the holding of an é on by l as may be necessary. Petitions must be in I tford on or before noon of the dates specified, all of which are Present Term Date Present SCM fice Ends \irg y 15, 1930 J. F. Wohlford Dec 2, 1928 Alask: july 15, 1930 W. B. Wilson Mar. 28, 1930 N. ¥. C. & LIT. July 15, 1930 M. B. Kahn June 28, 1930 -Wy ng July 15, 1930 P. N. James “hg resigned) \ nt J 15, 1930 Clayton Paulette July 28, 1930 : July 15, 1930 H. W. Kerr July 28, 1930 ol July 15, 1930 H. C, Storck July 28, 1930 Mississiy July 15, 1930 J. W. Gullett July 28, 1930 Southern Te July 15, 1930 R. E. Franklin July 28, 1930 Kansas July 15, 1930 J. H. Amis July 28, 1930 Arkansas Aug. 15, 1930 H. E. Velte ug. 28, 1930 Kentucky Aug. 15, 1930 J. B. Wathen Sept. 8, 1930 I tir ° Aug. 15, 1930 liana July 15, 1930 D. J. Angus resigned) N h Car i 15, 1930 Hal Justice resigned) Michigan July 15, 1930 Dallas Wise resigned) le to the resignations in the Utah-Wyoming, Indiana, North lina nd Michigan Sections, nominating petitions are ereby solicited for the office of Section Communications Man- ager in these Sections and the closing date for receipt of nomina- tions at A.R.RI Headquarters is herewith specified as noon, July 15, 1930. Reports from ORS in these sections should be sent to the Acting SC M listed on page 5 of QS7 *In Canadian Sections nominating petitions for Section Man- rer must be addressed to Canadian General Manager, Alex Keid, 169 Logan Ave St. Lambert, Quebec. To be valid such just be filed with him on or before the closing dates VWembers residing in the Sections listed reby notified that an election for an A.R.R.L nications Manager, for the next two-year term of 0 be held in each of these Sections in accordance i visions of By-laws, 5, 6, 7 and 8 rhe elections will take ace in the different Sections nediately after the closing date for receipt of nominating itions as given opposite the different Sections. The Bal- ts mailed from Headquarters will list the names of all eligible indidates nominated for the position by A.R.R.L. members residing in the Sections concerned ’. Nominating petitions from the Sections named are hereby solicited. Five or more A.R.R.L. members residing in any Section have the privilege of nominating any member of the League who holds an O.R.S. appointment in their Section as candidate for Section Manager. The following form for nomination is sug- gested in pet lo

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WW (Place and date) rer, A.R.R.I rd, Conr nembers of the A.R.R.L. residing in n of the Division as candidate for Manager for this Section for the office tures of A.R.R.L. members are required.) five or more signers must be League ling and the candidate must be the Communications Department, Official tment or the petition will be thrown mplete name, address, and station call included. All such petitions must be rs office of the League in Hartford, Conn., date given for receipt of nominating t on the number of petitions that may er shall sign more than one such petition red to take initiative immediately, filing ft Is for each Section listed above. This is he man of your choice in office to carry ion in your Section E. Handy, Communications Manager. ELECTION RESULTS nominating a single candidate as Section number of Sections on or before the been announced for receipt of such peti- DIVISIONAL REPORTS ATLANTIC DIVISION NEW JERSEY —SCM, Bayard Allen, DH will QRT in June until the Uni- September. W3ATJ handled a few v l is ready for the tests on 28 me portable under shadow of WSC's mast IS, an old-timer, is back using 7 me. ex- nd W3WW, both cps at WPG, have tud W3KJ has installed push-pull e a ‘phone addict. W3BUF hooked his WS3BVG has gone to the Moody Bible WSADL is kicking out FB with a new sa new op in Ocean City. W3AW is WS3AS is on at a new QRA. W3AIU has visit to N. Y. C. W3BAN, with no his home, has rigged up a 110-volt chine, and is stepping on it. W3BWJ 14me. W3AWL has applied for ORS WS3ATJ 54, W3UT 21, W3AWL 6, DELAWARE-DISTRICT OF COLUM- t Calhoun, W3BBW If any of you t in storage for the summer, say so and cancellation. Maryland: W3CGC iffic: W3AIL, a new one in Cumberland, W3LA is experimenting with Airplane FF says QRN is messing up everything 210, and blew it, so is back with a 112 enting with voltage feed hertz. W3GF is ercial ticket. W3BCX and W3DG are ent with television this summer. W3NY South America. W3\VJ has a code class W3BBF is a new Baltimore ham using a Delaware: W3ALQ leads this state with a W3AJH says he can't hear anything but W3HC reports several new ones in Dela- Columbia: W3BWT still sends in his usual the leaves on the trees absorb lots of his in A.C. receiver perking. W3C DQ said Padi lub banquet was a ‘‘wow.’’ Vice » rt of A.R.R.L. and Paul M. Segal, Rocky Director, attended. W3GT is trying to 1Z nearly missed this report VT 540, W3BF 103, W3CGC 42, W3PM LA 15, W3AFF 11, W8CDQ 8, W38ALQ 400 3, W3AJH 2, W3HC 1, W30Z 38 PENNSYLVANIA —SCM, Don _ Lusk, mast month the SCM has been ex- . new arrival (a YL opr). W8VD's llow radio as a hobby, but you will Monday Eve. If some one could find OST JuLy, 1930 tions. As provided by our Constitution and By-Laws, when by one candidate is named in one or more valid nominating petitions this candidate shall be declared elected. Accordingly, election certificates have been mailed to the following officials, the term of office starting on the date given Quebec Alphy Blais, VE2A¢ Jan. 21, 1939 Alberta Fred Barron, VE4E« Jan. 21, 1939 Saskatchewan W. J. Pickering, VE4FC May 15, 1930 Nevada Keston L. Ramsey, WO6EAD May 15, 1939 Southern N. J. Bayard Allen, W3ATJ May 15, 1939 In the Northern Texas Section of the West Gulf Division, Roy Lee Taylor, W5RJ, J. H. Robinson, Jr.. W5BG, and Joh Adams, W5BH, were nominated. Mr. Taylor received 24 votes Mr. Robinson 21 votes, and Mr. Adams 8 votes. Mr. Taylor's term of office began April 25, 1930 In the North Dakota Section of the Dakota Division, Guy | Ottinger, W9BVF, and Wellesley Beeman, W9DFG, wore nominated. The first balloting resulting in a tie vote, a second set of ballots were distributed. Mr. Ottinger received 21 votes, and Mr. Beeman 14 votes. Mr. Ottinger’s term of office began Apri 25, 1930 2 In the Western New York Section of the Atlantic Division John R. Blum, WSCKC, and Don Farrell, WSDSP, wer nominated. Mr. Blum received 89 votes, and Mr. Farrell 5s votes. Mr. Blum took office May 15, 1930 In the Wisconsin Section of the Central Division, C. N Crapo, W9VD. and A. D. Sanial, W9AZN, were nominated. Mr Crapo received 45 votes, and Mr. Sanial 28 votes. Mr. Crapo’s term of office begins July 1, 1930. a solution for W3A KB's MOPA, she will be his sked any ole day. The SC M takes pride in W3MC's fine showing in both traffic and 00 reports. W3AUR evidently is in earnest about his ORS and is now eligible. Ditto to W3UH, who reported by telephone. A word of warning is issued to those who failt report next month and thereafter: Cancellations are in order and the following will be crossed off unless satisfactory explanations are forthcoming: W3LC, W3NF, W3TB WSDHT, WSAWO, WSCWO, W3UX, and several pro spective non-ORS will have to start all over again unless action is taken immediately. W3AQN is moving to Canada and promises all ‘phone men a report. His address will be care MacLarens Dam, Via Buckingham P. O., Quebec Canada. WSEU rebuilt his haywire into a glass cabinet W3ZF is coming back to Xtl after cussing a self-excited rig that went bluey Traffic: W3ZF 227, W3UH 85, W3MC 89, WSEU 3, W3AUR 28, W3AKB 6, WSVD 6, W3DZ 5 WESTERN PENNSYLVANIA SCM, A. W. Me Auly, WSCEO WSYA, in spite of poor radio weather maintains 16 schedules and the Section Leadership. WSDLG is still going strong. WSCEO has schedules with two Diree- tors and WIMK. WSCNZ is on 7000 ke. after midnight WSCMP is building a new transmitter. WSDUT is or Sundays. WSAGO wants a Friday schedule. WSBQR, of State College, will be at his home station, W3AHZ, during the summer vacation. WSARC works the Division Director on A.-A. sked. WSAVY is on consistently. WSDKS and WSAWR are active in Uniontown. WSBRM is moving WSAPQ is troubled with QSX. Reports are still coming in from WSCFR in Rio de Janeiro. WSGU and WSKD wil keep a schedule with WSCMP until after the convention A Naval-Amateur Reserve unit isin the process of formation in Erie. WSC LQ has been released, and Heck is going aftera two-letter call. WSASE says he can check frequency te about 3 ke. J. M. Gates, an invalid in South Fork, Pa.,s studying the Code and is planning to build a transmitter WSOB has moved. The SCM would like to have his new address. W8CGY wants to try for an ORS. All hams should watch for the Standard Frequency schedules announced in QST, and copy the signals Traffic: WSYA 858, WSDLG 154, WSCEO 62, WSCNZ 23, WSCMP 17, WSDUT 11, WSDKS 9%, WSAGO 4, WSBQR 37, WSAPQ 19, WSAVY 18, WSAWR 11 WESTERN NEW YORK Acting SCM, J. R. Blum WSCKC WSCPC has skeds with Porto Rico. WSAFM should send a description of his station to headquarters WSDDL is moving for the summer. WSCUT is having wonderful success with A.C. receivers. WSCYG is exper menting with antennae. WSBOX is back on the air. WSD ME uses XTAL on all bands. WSIH is getting out fine with his high-powered fone. WSDXE is home from the Navy tors few days. WSDSP has two XTALS on 3.5 me. with a push-

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Jury, 1930 llamplifier. WSBJO has a « plete new xmitter. WSBLP % active again for the summer. W SDEJ is a Y.L. op WSDSA has application in for O.R.S. WSABQ receives some rv FB letters from hams. WSBGYV is on 14 and 3.5 me rts the activities of the Jamestown gang. The iteur Radio Association is now affiliated with WSAV™M is rebuilding. WSAWM is blowing WSBIF is awaiting receipt of new station re or less. WSC MN WSBAYV rep lar ect mn Ar the A.R R.I yaratus. Hi se. WSBUT and WSCLB are on m« sin a sanatorium at Dansville. WSNW is active. WSBAV s off forever at its present location. WSBYD has fairly d results with his 112 on 4and 7.3 mec. WSNW, WSAVM, WSBIF und WSBUT received their first-class operator's censes at Buffalo. Annual Meeting R.A.W.N.Y. The fialo Club or R.A.W.N_Y. held its annual meeting at the Hotel Sagamore in Rochester on April 26. T. W.C WSAFM, acted as chairman and introduced the speakers as follows: Dr. Grinnell, U. S. Radio Inspector, who spoke on Standards of Frequency. WSC KC gave a campaign speech f WHAM told of his work on 56 me. Mr. Robert S. Burnap of the R.C.A. told of the efficiency of the 224 asa higher frequencies. Mr. R. B. Dome of it the short wave antennae at Schenectady onnette, r the G. E. told ab Ralph Rieman led a discussion on the aforementior ed sky res. The R.A.W.N.Y. wishes to go on record as having sf sored and held the largest unofficial meeting or conven- n the East. There were 102 present including several embers of the Snarks in affiliated clubin Western N. Y ild be given to T. W. Connette f WSAFM WSBJO 61, WSCPC 24, WSCSW 0, 25, WSDSA 3¢ | f this meeting st i Johnnie Miller Traffic: WSAFM 1 WSBLP 0, WSDSP 26, WSCR¢ CENTRAL DIVISION ] Wasne 1 SCM, D. J. Angus, WOCYQ The Fort Wayne Radio Club is going to have a big picn June 2ist and 22nd rt Wayne are going to put in a new radio station for drill rk. WOAEL, WOFHZ and W9FVY are rt Wayne. WOGFJ moved and had his station going be- re the furniture had all been moved. Hi. WORTH, VODWI und WO BHM have changed to Xtal in the last th. WOBWI is n the air after a month of rebuilding WOC VX is increas ng power WOCOL is in New Mex tor WORW is building new receivers. WOAOO is with a 50 on 7000 ke. WOFXM is back from the spital and wants a Michigan schedule. W9EPH sends ina port for the Richmond gang Traff WOAIP 23, WOGGJ 22, W9GCO 7, WO9AKJ 22 at Lake George. The Navy gang at new stations at s healt} Wot KJ 10, W9OGIS 20, W9AOO 6, WO9CWS 26, W9CMQ 2 LLINOIS SCM, I J. Hinds, WOAPY WOFBT s installed another 250 on his fone set. WOCSP is now on 1000 ke. Fireworks were displayed at W9EHQ when they rot t itinapr ary resistance in the 1000-volt trans- rmer on a 210. Hi. WOACH is exploring the 14,000-ke und. WOANX blew his filter and is staying off until things re fixed. WODLYV uses 2 201A’s with fine success. WOBNI nd WOFIE have made application for ORS. WOBNL has een handling traffic from Hawaii and Guam via relay on est ust. The Centralia! s had a portable fone on a ham- et | 15 miles from town, and kept in touch with the e base all the time. WOASY and W9APY each have new reen-grid sets going nicely. Illinois Bell Telephone Radio ib has a code class of 17 new prospective hams. WOBDW ras QS0 WEAT and took traffic. W9TJ is back in Chicago ind will start up an outfit under WOPK. WOERU has been per and 14-me. bands. W9DSS has quit wing blocking condensers and has taken to blowing formers. Hi. WOFFQ worked Africa with his 210 WIBXB is building a new transmitter. WOBAI has a re- te ntrol outfit. WOPA has a new typewriter, so things ay go faster there when he gets up speed. WOBEF has eard plenty of DX on 14m but has been unable to work ny. WOCPY, WSBIH, WOBOY, WOFFR, WO9AGT, and V9BEF had a two and a half hour fone QSO together one lay morning. WOKA is moving again. WYCKZ is build- nga new AC receiver. W9GJJ graduates from school this ith. WOGIV says, My Kingdom for a Crystal.” crystal, but won't take a kingdom for it. s time on 7 VOBNI has a says he has been mostly on 14 me. WSNP voic existent Ost 51 W9DGK isin the experimenting mood. W9ALZ was married this month. WOAKA and W9TQ will soon step off into the inknown realms of married life. W9DOX has been trying to find why his set is Q8K. W9EGY received a QSL from Sudapest, Hungary, reporting his 3500-ke. signals. WOBZO hreatens to drag his crystal down to 28 mc. W9ACU is still rking 7- and 14-mc. bands with his 171-A and 180 volts f B batts. WOFCW is remodeling the outfit into a nice abinet. W9AAE is erecting a new mast for the business end fhisnew MOPA. WOFPN and W9LL are busy with exams. WOFPN desires schedules with 28-mc. stations. WOAFF is n 14 me. and finds things slow. W9DCK has been on 3500 ne lately. W9CZL reports traffic and DX fine on the 7-me. band. W9AFN is R9 with the BCL’s. WOBIR is starting in Reception is poor at WOBVP. W9CNY is over- hauling. WOFD4J is using the WOBYC circuit in May QST ind says, ‘‘ How it does work.” lrafic: W9DZM 146, WOBVP 65, W9CKZ 50, W9CZL 1, W9AMO 25, W9ASY 24, WO9DGK 23, W9BZO 20, WOBNL 19, W9FCW 16, W9OLL 13, WOFDJ 10, WOPA 10, W9DCK 9, W9AFN 8, W9ACU 7, W9APY 7, WOBIR 7, W9CUH 7,W9GIV 7, WOKA 4, WO9AKA 3, WOBDW 3, W9ERU 3, W8BMQ 2, WOCNY 1, WOFPN 1 OHIO SCM, H. C. Storck, WSBYN All king forward to the ming nvention at WSCNO still leads the section. WSBAC cx business of us are Dayton. mes second, and es the com- n complaint, radio conditions rotten and schedules non- WSBKM says the same. WSAQ is having ‘phone 1RM. WSCSS has been trying his hand at ‘phone. WSCFT any of these phone men ever saw a telegraph ey. WSBBH has his crystal rig going. WSADS says he has een sick. WSTK says that if QRN does not soon stop there s going to be another ham set listed in the ham ads. WSEJ ivises that he is getting things together for crystal control WSDMX cannot understand why stations make schedules nd then fail to keep them. WSAPC has about given up the p until QRN lets down. WSBBR is still on the sick list WSCX has a good formulae concerning Y Ls and DX, best yet. Hi. WSBRB is a newcomer. WSBDU reports the Naval teserve unit coming fine up his way. WSBEA is still going WSPL says air has been dead. WSHH has nothing self. WSDBK will be on the air from Georgia, August, with portable call WSZZC. We have a new 1 with us in the person of J. W. Hardesty, WSDAIT, an d Morse man. WSJC recently moved to Dayton, but he on the air. WSCFL says his main trouble is th A" batteries. WSBZL is quite active in tests, and adds iblic list of off-wave offenders. We n KFNA. He reminds me of the nders } wil £ say for | f s vote In favor of a p se WSRN again. He is « ¥ is bout “On again, off again, gone again, Finnegan.” WSIF has been off the air on account battery trouble VSBYN has also been off the air as he has been away from Trafic: WSCNO 86, WSBAC 48, WSNP 41, WSBKM 34, WSAQ 26, WSCSS 23, WSCFT 22, WSBBH 22, WSADS 16, WASTK 16, WSEJ 10, WSDMX 7, WSAPC 7, WSBBR 6, WscX 6, WSBRB 4, WSBDU 4, WSBEA 4, WSPL 3, WSHH 2 KENTUCKY What goes on here SCM, J. B. Wathen III, W9BAZ— Few reports and low totals. We can't all ir place is to show ‘em that Kentuckians be winners, but « re Thoroughbreds! Lean on those keys. W9OX staggered ver the line to win his second lap. Tied with W9AZY at two all. WOBAN took a flyer, but fell a trifle short. WOFZV is plenty of traffic but no takers. W9BAZ is off for two eeks, as the house is being remodeled. WOGGB has pinned his reputation to a single 210. Bad conditions broke up keds for WY9DDQ. W9ELL is getting out very well with l4-me. fone. WOEYW has built another xmtr which is the last word in performance. W9AZY has a new receiver for DX. The BCL’s are trying to hook their sky-wires to W9BWJ's new tower. WOAUH reports schedule with W2VO. W9AXU breaks loose with news on his remote control W9ZZE is on the move again. W9DAI is unsuccessfully uttempting to raise Cuba. W9AIN has been seen frequently W9OAJY is a source of wonder to guests of the \ prize will be given to the ORS handling July, August and iled up now. vith “the yl Kentucky Hotel highest total for the summer months September), so better get your skeds

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W9BAN 45, W9FZV 37, W9BAZ 18, DQ 11, W9AUH 6, W9EYW 9, W9ELL WJ 6, W9AXU 3. SCM, Dallas Wise, WSCEP — WSCPB und a 250 on 14,000 kes. WSGJ thinks he re he gets a crystal to perk. WSDDO he same old way. WSTJ is back again VX for radio. Army activities hampered WSDYH has been busy sending code ner If interested, listen on 3600 kes redays, at 7 p.m., E.S.T. W9AXE re- rnals on 14 me. WSBRO wants to go to nal Guard in July. Any other Hams in- with WSDMS at Detroit. WSCKZ is mer, but not with the old transmitter ra uple of beginners the code. The base- Ming the traffic down at WSDED's. to Ypsi for the Hamfest .W9CE reports th 7 and 14 mc. WSAJC is busy with )V is studying for a commercial ticket e schedules have gone “Hay Wire.” into the traffic column next month p with the National Guard. WSDFS the heavy QRN. WSCEG is a new- WSCU can’t get the insects out of his laying around with a screen-grid de- RS reports things dull. The Michigan National Guard Armory was the best 1 to date, there being about 118 Hams 1 WSBRS were two of the notables VSCAT, WSVT, WSCOW and WSDYH i we'll say ‘ Well done.”’ Having served past three years, I feel that I can no This will be my last report gang, for your splendid coéperation. r SCM election to be held later, please neth Conroy, WSDYH, 7553 Robin- Cul, gang, and hope to QSO from duties WSCEG 3, WSJD 129, WSASO 6, WSAJC 61, W9CE 5, W9GJX 5, WSCKZ 4, WSBRO 26, W9AXE 16, WSTJ 12, WSDDO 19, WSCPB 12, M,C. N. Crapo, W9VD — W9DTK ympleted. W9FSS has no Army ring the summer. W9FAW has a new D now has a new screen grid DC re- und Hi C transmitter all in good WOFSS 3, WO9FAW 1, W9VD 4. DAKOTA DIVISION Y DAKOTA SCM, Guy L. Ottinger, sure do appreciate being made SCM, - 1 will try to fill the office in the most WelTK, W9CUU, W9EEK, W9FLF, DYA enlisted in the Naval Reserve. going to Coyne next fall. W9DM handled Sis QRL work. W9DFG states that the r. WOBVF handled a rush message via from a U. S. Marine Aviator, who 1. WODYA may not get in the Naval 8, WO9DGS 16, W9DM 5. \ SCM, D. M. Pasek, W9DGR — port a fine picnic at lowa State Park, ng being there en masse. W9DNS is I/BQV stopped at W9CIR for a nice gon a 3.5 me. xtal outfit. WOCKT S itfit. The following A-A stations WYDB, W9DNS, WOCIR, and W9DB 11, W9DGR 2 NNESOTA SCM, C I Jabs, planning on a mercury arc. WO9DOQ station at Virginia. WO9ELHO has a t busy with farm work to use it. Hartford to attend the A.R.R.L. Ost JuLy, 1930 Soard of Directors meeting. W9GGQ asks to have his O.R.8 put on the inactive list for the summer months. W9F AQ sends in a fine letter reporting on activity at his station W9BVH expects to be on again after making a few minor changes. Traffic: W9AV 27, W9DOQ 4, W9BVH 7. SOUTHERN MINNESOTA — SCM, J. C. Pehoushek, W9EFK — W9COS could only handle 668 msgs. this month. Hi! Leach at W9BN has been rebuilding. WODRG rates a WAC certificate. W9BKX is going into his usual summer experimentation and improvement period. W9AIR attended two banquets. WOBXE was on the rifle range most of last month. W9ABK is on at WOBXE some. W9AQH has moved to Lake Minnetonka, where he has a beautiful 860 crystal-controlled set in his shack. Ex-W9IL is now W6IL at Los Angeles. W9GHO is putting in crystal control. W9BHZ is planning on lots of fishing. W9DGE is operating on the river. W9EFK is on spasmodically. WOEYL expects to be on regularly through the summer. W9BSH is QRL at WRHM. W9FLE was sorry not to make the Ames conven- tion. W9GGA, W9DHP, W9CIX, WODGW and W9DOP are all on the inactive list. W9EOH is with KSTP. W9BQF has three transmitters on three bands. W9YC staff has been rebuilding WLB. Cotton, W9DPX, will be the R. I. at Port- land, Oregon, after graduation. W9DBC. has been quite sick but is improving rapidly. W9FFE has been assigned to ex W9DZA. W9OBIY is at KSTP Traffic: W9COS 668, WOBN 323, WO9DRG 166, WOBKX 42, WOBXE 12, W9GHO 7, W9AIR 7, W9BHZ 4, W9DGE 1, W9EFK 1, DELTA DIVISION ENNESSEE SCM, James B. Witt, W4SP —It I looks like summer weather has started taking its toll W4FR will be off the air most of the summer as he is going to the country. W4LU will handle some of his traffic W4VK will also be away most all summer. W4AHB, who was formerly at W9ALY and W9AGD, has applied for an ORS certificate. Philip Stout of old 5X. K will be on soon wit! call letters W4AAD at Kingsport. W4AFS has skeds with nine different stations. Whether you are an ORS or not, send your reports in, fellows rraffic: W4AFS 63, W4FR 32, W4KH 4, W4CW 2, W4SP 4. MISSISSIPPI SCM, J. W. Gullett, W5AKP The following stations are members of the Army-Amateur Radio System: W5AKP, W5FQ, W5AAP, W5AAZ, W5BBX, W5BHL, W5AZV, W5BQL, W5BHI, W5GG, W5AWP W5BEV, W5ZZO, W5AUB, and W5BHC. W5AAP says traffic has fallen off greatly. W5AWP and W5BHI have new transmitters going in the 700-ke. band. W5AHR isa new station in Corinth. W5BHL has made application for ORS appointment. W5AZV reports that Jackson Amateur Radio Association has been formed with himself as presi- dent; W5BHL vice-president and W5BNW treasurer W5BOT is a new station in Jackson. W5AED is back with us after several months’ illness. W5GQ is talking of rebuild ing his transmitter. W5BMA has moved from Ellisville to Laurel. W5AKP has two new Western Electric 211E tubes and is debating as to just what he wants to do with them Traffic: WS5AKP 88, W5AED 83, W5AAP 20, W5AWP 18, W5AZV 13. LOUISIANA — SCM, Frank Watts, Jr.. WO5WI The first item on the clip this month is to mention the LOUISI- ANA Convention, to be held in Shreveport sometime during the latter part of the summer. We also will welcome any op from out of the state. W5BHV reports that the OW has taken up ham radio and will apply for license. W5EB, wh is the Director from Delta Division, visited WSC M P on his return trip from Hartford. W5YW says they are always looking for traffic. W5ANA is now working on a xtal rig W5ZW is the call assigned for the use of the Pelican Wireless Club of Munroe. W5BD4J is on the inactive list. W5ACY is now in the Army-Amateur Net. W5NO is operated by 8 group of operators of a seismograph party. W5MH reports that 7 me. is the only band he can work. W5WF was dis rupted for a few days on account of storm blowing antenna WiVK 23, W4AJQ 8 down. : : Traffic: W5ANA 50, W5WF 49, W5YW 28, W5EB 23, W5BHV 19, W5ACY 1, W5PG 12, W5BKL 13.

Page 51

930

RS FAQ ition ninor shek, this DRG usual JAIR most H has 1 860 ILat IBHZ n the to be L at nven- DOP IBQI been Port- © SICK to ex BKX DGE JQ § The Radio BBX AWP says have tis a yn for ateur } pres » surer : with build ille t tubes then AWP The UISI luring ny 0} \ has . wi on his lways al rig ireless CY is by a eports 3 dis- itenna B 23,

Juty, 1930 HUDSON DIVISION SASTERN NEW YORK SCM, H. J. Rosenthal, k W2Q1 W2ALI is moving to Newburgh. W2AVS is back on the air after a six months’ vacation. W2BAI » 28 me. W2BKN says DX is good on 7 me 4. R.R.L. Directors and Laboratories. W2U0O had W2ANV says that 7 me W2BRS is also kr : W2sZ is off W2RD was js WOrKII W2ACB enterta showed the thre bad luck with trafi ntirelv dead durir ned several of the igh the G. E ec this month 7 is @ g the day KNOWN as WIARL when at his hor ts are beir rc nducte d ein Danbury, C the air while experimer the only I nxville ham reporting. W2ACY is marking time on 7 me. before going back to 35 me. W2LI reports the Schenectady Amateur Radio Assn. now has 84 members x to put in pure DC. W2BWYV again reports that he is 1 ng to the I W2QU has ar- ranged with the Pilot Good Will South American Flight to via n NNINIC raffic: W2QU 404, W2LU 135, W2ANV 96, W2BAI 53, W2BWV 38, W2RD 29, W2AVS 15, W2ALI 11, W2BRS 6, W2ACY 5, W2ACB 3, W2BJA 3, W2BKN 2 NEW YORK CITY AND LONG ISLAND Acting SCM, \ r. Kenney, W2BGO Manhattar 4 ORS, W2AJP, comes through with a total that be: ig th D strict 1] trafie + ti handle its ithe 1 stat I its all ORS in his boro except W2AFO, and while using 201A tubes tting reports from ZL and VK on his signals sides doing lots of OO work new ORS, wants skeds with Florida and Ver- irly vacation. W2BNL says he met ld 2DN on the air: after being off the air f DNe es back on 3.5 me. W2AOY says the « . ishlight and key with a gob on one of the battleships laving in W2BZN requests QSUs th the local gang. Bronx W2AIl leads the Bronx YX is visiting at various conventions around the ry. W2AET W2AQG is having his ibles with BCLs cutting down the sky wire. W2VG has QRT most skeds ather. W2APV can now sheard on the 14 ec. fone band with a fine signal. Brook- W2ATZ is getting D3 reports without W2AFO leads his boro be W2BXW, a nt. W2BDJ had an ¢ r seven years niv OSO the harbor keeps them g ng ntil the « ler we any filter in W2ARQ's new YL is causing plenty of W2APK sends in a good total. W2PF, Army Radio Aide, helped man the Hudson Division conventi W2CCD is just about ready to hit the sea again for the mer. W2BIV, OO, has a 14 me. fone going. W2BEV, a ses to make the BPL next month. W2BJF W2AQQ tells us he'll be on 14,000 ke the su er. W2BRB is working on directior ng Island W2AVP, the old reliable, has s W2CGA. W2AYM, e list W2AJP 48, W2AFO 44, W2BXW 2, Bronx W2AI] 77, W2BGO 47, 5, W2AET 19, W2AQG 12, W2VG 2, Brooklyn —W2ATZS4, W2ARQ 58, W2APK 52, W2PF 28, W2CCD 7, W2BIV 17, W2BEV 8, W2BJI W2AQQ 3. I sland W2AVP 52, W2AYM 1 NORTHERN NEW JERSEY SCM, A. G. Wester, r, W2WR W2CXL turns in the usual excellent total W2JF « plains of bad wx and cancellation of skeds. W2DX sa YLwt f the air. W2AQOS says that QRN s dropped his traffic figures. W2WR has been to Atlantic ty on business. W2APU and W2QVQ complains about the I W2CWRK has too W2AG\N is rebuild na BC stat the tr R tter IRM for I first rer rt finders and anew [ perating at his sha ; he the Boy S it station, goes on the inact Traft \Ianhattar 7,W2BDJ 8, W2BNI W2CYX 4 » keeps | a I ich business pressure to ng and installing an 852 W2BPY intends to n 7060 ke. with has been busy stalled a xtal and is: wa n push pull in the final amplifier ( { ther who complains about po BTT and WB MF paid a visit to our YL stat 2BZB is out for DX on the 14-me. band Traffic: W2JF 86, W2ACS 21, W2APU 2, WUC 14, W2AGX 3, W2AVO 22, W2BPY 1 W2CJX 16, W2BZB 3, W2CXL 338. MIDWEST DIVISION YEBRASKA SCM, < B Diehl, WO9BYG — N W9ANZ has been very ill. Mrs. W9ANZ reports for = hin month. W9QY and W9BOQ are busy r conditions yn, W2BY. W2CWK 4, 2, W2PC 15, this work. W9EEW runs away t Chgo this month

OST 53 W9DTH can't scrape up much this time. W9DVR reports. W9EBF says QRN heavy. W9FAM is rebuilding for higher ficiency. W9EHW is * Cat-Hauling’’ power supply for DC ne. WOBHN, a new ORS on 7100 kes., has nice total. W9DI is rebuilding for 14 me. 9GFQ, a new CC station, is n the air at Lincoln. WOBQR is building a Zepp Ant. rraffic: W9QY 12, W9DTH 3, W9DI 2 IOWA vids the gang tl W9EBF 1, W9BHN 10, SCM, H. W. Kerr, W9DZW Davenport his month with W9ACL in the lead, followed sely by WO9FUD. W9BCA has a KFR6 sked. W9FZO tes the TSARC plan a new club house and permanent station. W9DXP notes prospects for club at Des Moines W9BSZ is active. W9APM is rebuilding. W9HD is xtal- ntrolled. W9FFD has been 14,000 ke. since convention. W9DUN, another newspaper and golf bug, reports a few f W9FWG has visions of a new college. W9EJQ has his Amateur rL will be on again with brother Glen at nd gang called on WODIU, W9EJQ and ] W9GKL reports for Ames tr. W9EOP fix shes

VW to nvention, also on W9EXQ and W9DXO. The Ames convention was a WOW, and no one ent sleep on a solid day of technical stuff. Our thanks to ull who helped make such a fine meeting rraffic: W9ACL 68, W9FUD 47, W9BCA 44, WO9DZW W9DXP 18, W9FFD 9, W9DUN 7, W9FWG 2, W9EOP 2, W9EJQ 2 ,ANSAS SCM, J. H. Amis, W9CET The usual mmer slump is with us. Your SCM doesn't like to cancel appointments, but it will be in order if you don’t report ich month. W9DFY takes traffic honors. We are glad to see WO9FKD putting W9CET is all nding some new tion to enter We're sorry to lose you, OB. ssible to keep skeds on account of bad R-5 from WFBT in N. Z. with 20 watts it on 141 WOHL reports little activity in western nsas. W9ESL lost his tw it large traffic totals again tests. WOFLG W9GFO is leaving the sex set for the 28-n has been w ver transformers radio school in New Orleans nds it imp lattice masts in the big tornado y t's all get on 14 me. for the summer and keep ir traff up. The T W.S.N.R. unit drills each Wednesday nite at their Armory on the State Fair grounds. Midwest nvention will be “eptember 5th-tith at Topeka. The K.V.R.C is busy making ns. At the first meeting in May the K.V.R.C elected the I f ming year: WOCET., President, W9FLG, Vice-President, WO9DEB, Secretary and Treasurer raft WO9DFY 80, WS9FKD 55, W9CET 52, W9FLG W9CFN 14, W9BTG 10, W9HL 5 MISSOURI SCM, I B Laizure, W9ORR St s reports WODXY led WOFTA was second. W9AMR was off doing considerable rebuilding. W9ODYJ is vn on 14 W°9ECI sends in a first report. He has pplied for ORS and W9DQN led Missouri this month with the assistance of W9ECS and W9ALC, who have

peka rhe dates for the Division C ‘ gz ¢ ers tor the « 28, WOGFO in traff OBS appointment been operating much of the time. S.N.R. traffic. WODPA W9GGL is still getting s W9BMA is runr skeds. W9ASU was in Kansas City for an operation, but is ick home, now. WOFUN has been trying out Electr »lytic ter condensers. W9AOU and W9API are two Webster Groves. WS9EDK had nsiderable itely, moving and changing jobs. W9EYG is now on in Monett. W9GAR reports a new ham on started I s section known as the South Missouri Association of nsiderable | heard’’ DX list IA KZ rebu It the works ng 6 new stations trouble organizat ad Amateurs which W9CLU and W9OGAR are taking he lead in promoting. W9EP is still open for east and west skeds. WOBJA has been having trouble with filter con- densers. W9C DU says he will be on 7 and 14 me. until fall. W9ENF was on more this month. W9DHN has school W9DNO was only on two days home week-ends. WOBGN represer ted the St Joseph W9DCD sent in a long report. W9GAW W9AWE is busy run- st of the mont! gang this month vas killed in a motorcycle accident ng a summer resort camp rraffic: WODXY 104, W9OFTA 50, WOAMR 6, W9DYJ 5, W9ECI 11, W9DPA 3, W9AKZ 62, W9BMA 90, W9CFL 75, W9DON 307, WSEPX W9BJA 17, W9CDU 30, W9ENF 10, W9DHN 12, W9DNO 8, W9BGN 52, W9GAR 52.

Page 52

OST JULY, 1939 NEW ENGLAND DIVISION MASSACHUSETTS WICMZ, WIWV and WIBR head ntemplating crystal is now op on 8.5 Valparaiso, Chile, and has resigned his WIBBT reports a fine time on W1LWU is winding a new 1 KW Iding separate outfits for 3500 and on regularly now that B was very QRL at WPC this month W1BZQ still reports difficulty in WIWYV has been eds with W10-XS, one of the Boston to A new MOPA is now perking {S appointment of WIRL has been WI1CQN again report some traffic setts Amateur Radio Association and represented at the Worcester Conven- is planning a club house of its own larger membership than ever next fall WIBXB 46, W1WU yn Arrangements, says ‘ortland will be better, bigger and ned to the house tors WILAQD reports handling WILAUR is second high » is picking up over his ng through a bad power leak is the proud father of an eight- WICPH are new prospects for ORS a trip down south, where he has been WLBCR'’s trans- WI1MO© is active on 7 me ties direct to HQS. He, WLOU, WI1AFO ExW1ABP expects to be is a newcomer to our ranks received the fone signals from ), while they were flying ib meetings are held every Monday yn is extended to all amateurs to WIMO 14, WIGV 6, WL1OU 1 Ells, Jr.. WICTI t his receiver. W1HQ says very little do- AMQ received his ORS appointment nted official observer of skeds. WLCKP reports things WILATG tells of WLAPN, rt with a 210. WLAKI sends in his W1BOD was on the de- t of traffic on 7100 ke. WIJN is W1LAOX reports work- la, on its flight from IBJK gets on 3.5 mc. once a week yon be on at new QRA in working hard fixing up new is experimenting with different in time to make the write-up. Traffic: W1MK 493, W1AMQ 46, W1HQ 3, WLATW 3 WI1AFB 79, W1AKI 2, W1BOD 17, W1AJB 3, W1IABL 7% WIJN 55 VERMONT SCM, Clayton Paulette, Wilt — W1CGX is again high man with a total of 73. W1BD come next with 20. W1A00 reports. Most of the stations in the state have cancelled their skeds for the summer Traffic: WiCGX 73, WI1BD 29, WL1AOO 10, WIIT ¢ WESTERN MASSACHUSETTS SCM, Dr. J. 4 Tessmer, W1UM — WINS had a race with W1BZJ for first one working all districts on 3.5 mc. W1NS won with his 2 WICTF is bothered with much QRM from local YL’s W1COsS is attending Sam Curtis’ Radio School in Boston WI1ARP has a baby YL. WIAMF has the most beautify transmitter. W1LA RP has beenin N. E. or N. J. WIBLVand WICRL visited W1MS. WILBKQ had a hum-dinger Spring Ham Fest and Pitch Party. W1AJK is in Brookline and comes to Worcester week-ends. W1AQM is on 3500 and 14,000 ke. wid a 7 '4-watter. WIBVR is still on the 3500. ke. band. WIBNL is building a new traffic tuner. W1API will be on regularly soon. W1BG is experimenting with ‘phone. Traffic: WIBVR 29, W1AQM 16, WIAPL 3, WIZA@ NEW HAMPSHIRE SCM, V. W. Hodge, WIATJ — WI1APK sends in an interesting report of two-way airplane work with KHIJQ, the plane New Arabella. WI1AEF doesn't have time to pound the old key much. WICOW wil be on at W7ANZ on 14 me. in a month. WIAUY reports things very quiet in Meredith. WILIP is going to rebuild the whole works. WIBAC, a new station in Claremont, is reaching out with a 2)1-A. W1UN is building some portable sets for use in the White Mountains. The SCM reports a new Jr. Op., born May 2d lraffic: WIAPK 17, W1COW 9. NORTHWESTERN DIVISION ONTANA SCM, O. W. Viers, W7AAT-7QT— M W7AAW and W7HP are the only reporting stations this month. The fellows who have been sleeping for the past two or three months had better come to life, o there will be some ORS tickets cancelled!! W7AAT is still on 7040, 7020 and 3799 ke Traffic: W7AAT 91, W7AAW 89, W7HP 2. OREGON — SCM, Wilbur 8. Claypool, W7UN —Coos Bay scores again. W7AMF makes BPL on deliveries W7UD hands in his first total. W7PE is using Electrolytic Condensers in his filter. W7ALM is going great on K7 traffic now. W7MY reports traffic. W7TO is heading for \laska this summer. W7WRK asks to be placed on inactive list for the summer. W7MV had such a hot report he wrote it in red ink. He is using fone on 3500 kes., as does W7 WH W7IF reports via radio. W7AHJ and W7AJX report in fine shape. The OW always leads TOM in TFC. W7AI1G reports rotten radio WX in his town. W7QK hopes to hang up 4 WAC with the new Hi-pwr. he uses. W7AMQ has an §5 perking now. W7SU has his X TAL going. The SCM is using MOPA with good success on 3500 ke. W7ANJ is also using it. W7AJW has put in DC. W7QY is in line for ORS Traffic: W7AMF 162, W7PE 58, W7UD 102, W7ALM 10, W7MV 17, W7MY 23, W7WRE 18, W7TO 20, W7AHJ9 W7AJX 6, W7AMQ 24, W7IF 10, W7AIG 2, W7UN 27 WASHINGTON —SCM, Gene Piety, W7ACS — The first place in traffic is taken by W7QF on his first report. He is vice-president of the Spokane Radio Ops Club and says that the plans for the convention are coming along fine Mason is back from the Byrd expedition, and the gang gave him a coming home party, in the Bergonian Hotel in Seattle rhirty-four amateurs attended, and a good hamfest was held. W7ACY has been working a little dx. W7FJ complains about school exams. W7AG is trying out 3.5-me. fone W7AFD blames low traffic on poor conditions. W7T X is not having much luck with his Alaskan skeds. W7A NP reports tonsilitis. W7BB reports from Canal Zone. W7 AJS reports between school tests. K7AIF (W7AF) sends in reports and asks gang to look for him. Don’t forget the convention 02 August 29th and 30th. Traffic: W7QF 33, W7TX 18, W7AG 10, W7ACY 6, W7TK 4, W7AJS 3, W7NR 3, W7AFD 1, W7FJ 1 K7AIF 8.

Page 53

1930 vutifu V and Spring e and 0 and 3500- LAPI t with LA 69 \TJ rplane 1AEF Ww eports ild the nt, rtable ports a

~ Coos veries rolyt ym K7 ng for active wrote 7WH in hne "eports cf up an 85 8 usinhé ) USINg 7AL) iz Bay eattle at wa :plain fone . 18 0 report report ts and ion on cy ¢ iFJ

t + and about 20 U.S. A. fones on this band. WUBZU out t Concord isn’t letting the call of spring and the droning of blebees bother hi as far as traffic is concerned W6ARI, new station reporting, was rounded up by our 1CRM, W6AQ. W6ASH reports that he is working in le radio shop now. W6CGM is a fire in on the Western Pacific and the other day his loc tive with the M the cab got tuned in on the same wave with a Key ned the street car, and gave He told WHAN, section reet car c pany, at the n of the crash that it wasn't personal M says that 00 work and b rolling stock keeps him too busy for nees that he h system street car, rul 11 pas- engers spots before the eves ecretary und in offic il of the et t ficial vestiga inyway W6CG WHAN's WiBIW s been monkeying ¢. WGRJ is busy doing 00 w WO6OAIN says he na vacat WuBI reports that he is busy getting six SNR fone and CW sets on the air for code practice and inll on 1S75 kes. WHAQO is isting up traffic with 28 is going ne of the new fellows brought nby Wr AQ WHATT is still doing his old BC and ham stint. WHALYV is still busy with that YL. W6ZA has an- nounced his engagement, and W6CQG, Vollmer, got mar- WoIP pent a short visit home before returning to the Orient on KDUY. W6DDA is ned a few weeks age also back Tor a yage Trafic: WOAWF 4 136, WHeBZU 72, Wt WéBIW W6ATI LOS ANGELES Act ~ Well, gang, this is my will take this opportunity to thank you one mlendid coéperation. Mr. Sandham is on the job “ain. Let's all continue our best efforts. The llowing make BPL this month: W6BZY-W6WA- W6DEP-W6AKW-W6QP-W6AKD and W6AOA. The Short Wave Club of Pasadena has been holding some inter- rhr courtesy of the Auto- and W6FE, the Long Beach gang 1, W6EIB 401, W6ALX 393, W6BPC j ARI 72, W6ASH 43, W6CGM 37, 37, W6RJ 22, W6AIN 18, W6BI 17, W6AQO 4 W6ASM M, so I and all for your ng SCM, C. A. Nichole last report as acting ¢ back to give him the eting meetings of late igh the Mobile Club of So. Calif

OST 55 had the opportunity to see the outfit and car that the SCM used on his trip. The ARRC continue to have some peppy rhe Bakersfield gang once more take the traffic ng the clubs, their total being 919. W6WA is sponsible for the reports each month. W6MA now has a for her operators license. W6ZZA is rebuilding his xtal control. W6BVZ has a new 210. W6EQD 7154.8 ke. W6AM says that W6BRO is not on much expedition returned. W6ABK says work W6ERL has new QRA. W6CZT is nging both xmitters to MOPA. W6CXW wants a sked near Chicago. W6BCK is another unfortunate ra living. WO6TE is rebuilding his re substantial bid for the ARRC W6EAF wants the Heaviside W6UJ complains of bum conditions in the W6AKD reports being heard in Africa on 5-watt xmitter. W6QP wants handle Philippine traffic W6BZY leads the section 250-watt jug. W6ID is ver like the one Schnell had at the con- blows W6ACL is re- meetings nner an rame rtable int« vy has his xtal outfit on 14,000 } s sure fb for dx now K the IPH ikes up his time th a nine ne that has to work f tter so as to make a m Cup. W6DVA has been a visit by W6AM. W6AWY up to San Francisco reports yer to behave 7 ke. band 28,000 ke. while using a rafic. W6AKW ntinues to WODEP handles plenty of traffic n traffic. W6BFI is waiting for a t ding new rece vention. W6DZI reports a tew uts building receiver. WGESA now has xtal control. W6FJ says hat his 210 xmitter works better than his 50-watt outfit W6ASM won the crogetted water bucket in the traffic con- test between the Pico Twins.’’ W6BXR annexed an OW n April. W6BVV is going to « tball and YLs raft W6BZY 545, W6WA 453, W6DEP 291, W6AKW 279, W6QP 274, W6AKD 229, W6AOA 154, W6AOB 137, W6DLI 129, W6UJ 89, W6ETJ 95, W6DQV 73, W6AWY llege and dreaming of W6ETN 51, W6EAF 51, WGENH 37, W6DVA 29, W6TE 29, W6BCK 27, WOCGY 23, W6AGR 14, W6ENQ 14, W6CXNW 12, W6BGF 11, W6CZT W6ESA 10, W6ASM 5, W6COT 5, W6BRO 4, W6AM 3, W6EQD 3, W6ZZA 1, W6MA 1, W6AZL 1 SAN FRANCISCO SCM, C. Bane, } 1 might well be headed it Dt 11, W6ERL 10, W6ABK 4, W6FJ 4, W6CIX 2, W6BVZ 1, Wo6wB Rebuilding.” rhe This has set all the boys to tearing up the W6ERK leads renort thier nth ew ruling ab ld heap and installing something different he parade in traff W6EKC comes along with a very close second. Incidentally, both WO6ERK and W6EKC make the BPL. W6DFR is to be complimented on the way he handles the A hedules each Monday night. Ane report this time is WGDCD, who breaks in with a very good total. Beginning June 15th July 15th all ORS in this section will be required to have a total of at least 20 nth. Failing to comply with this rule for two consecutive months will result in cancellation W6PW reports as usual. OM Phalen sends in his report for the first time in quite some little while. W6AC band. WtiAMP has finally succeeded in nthe of lost sleep! W6DTZ is concerned WO6EPT is with us again. W6ATI r his new xtal set. W6KJ of sigs on 28S As ther new man s each reporting m« essage is still fter 1 14 me. dx work rate plans f about us drawn up elab ind W6BTO are complaining ab Wo6ETR is scouting around for ry shortly. Once it absence which he plans on called He is now on the very a rock n putting in Vv there was a stat W6BIP, who used to lead the section bottom of this report why rraffic: W6ERK 170, W6EKC 111, W6DFR 88, W6DCD 53, W6PW 57, W6HJ 16, W6AC 13, W6AMP 13, W6DTZ 7, W6WB 6, W6EPT 5, W6ATI 2, W6KJ 2, W6BTO 1, W6ETR 2, W6BIP 1 ARIZONA SCM, H. R. Shortman, Jr., W6BWS- Woevy W6ALU makes the BPL with a fine score. He wants a couple of good skeds east. W6BJF and W6EFC report good traffic work. W6DGN has rebuilt his station W6DRX, a new man in Phoenix, is doing nice work W6DCQ is still monkeying with a 3500-ke. phone. W6DXC, another new man r some big traffic work. WSAYO is now living in Phoenix, having an operators job at KOY. W6DRE reports installing a pair of UX 852's. W6AAM, an old time, is back on the air with a UX 210 in TPTG. W6BHC spent two days in Phoenix. W6EFC reports rotten DX and bad QRN. W6EAA is back on the is getting all set f

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a » 14 me. W6EOF changed his trans- to TPTG with gratifying results. i W6BWS-WBVV, the * Three Musket- n when W6EH spent a week in W6CDU is operating at W6ALU. rts that he now has a junior operator of W6EEB-W6ECW from Los a new “all electric’’ receiver. The W6DAU. W6ANO is still pounding KGSL. W6EL installed a 14 mc. phone a monoplane to operate a public » ground in a demonstration at the rport. W6AWD reports moving. rmerly 3API of the old spark days, \ vith the gang W6BJF 106, W6EFC 66, WGAWD \ 2, W6EOF 1 M, H. A. Ambler, W6EOP — tion and makes the BPL. He is FB. W6BKX, a new ORS, is re- W6ACJ found time to handle a few. s going to be in on the 28 me 5 te often A and got RS. W6ADC got his 50 rked Hungary with 112A and 200 is troubled with power noises at W6EOS is still tests. W6ECP expects to be going strong )AlT are on fone. WGHY is heard on W6DNL is away with the at his new QRA. W6DNS and Y Ls. W6EOL is on with a 210. ut ice cream between ham hours. s going to build a 50-watt set soon. the tests. WOBFB has a s on lone now. 28 me W6BKX 96, W6ACJ 63, W6EPZ rP 19, W6EPF 13, W6BGL 9, W6BAM 4, W6AEP 4 eston L. Ramsey, WO6EAD The \ssociation is getting a fine start ving Club. W6UO is busy with Wwe VW pretty quiet now nd Pearl H irbor, I EGA, a new amateur at Yerring- in 852. W6BTJ is getting ready for has given up radio for the summer \JP is on 7 me. W5CRF is almost 3500 ke. fone. W6OBRYV is building W6CDZ promises All active amateurs get in touch ed a R.M. and some ORS. Let's r Nevada this summer. Fellows Nevada, get in touch with Reno, A. Walworth, K6CJB — K6EWB and has been appointed Route ng out AKRL broadcasts for the (0 p.m. h.s.t. on Wed., Fri., and simultaneously. The SCM visited Easter and was entertained by HERO. K6DYC, K6DQQ, K6ERO, K6CIB form the net of Official n Amateur operation. K6AXX, ilui, Maui,walked in on the SCM moved to Honolulu. K6AXK is al ticket. K6ACR, KGALM and field stations on Easter Sunday. rtable call is K6DQF. K6CEU is LGD. K6CIB just rec'd some fine ker. K6DYC is completely re- ng a 75-foot mast for joint use of EWB and K6éBXW report little K6ALM reports on 28 me. QSO building an AC short rt broken because he lacked two K6DXD has just started and ulph Wolfe of Hq. Co. 35th Inf., DUD, Tex Stafford, Officers Quar- H., is another new wave Philippines are routing through now. K6BXW, KsGEWB and OST JULY, 1930 K6DXD have totals large enough to make the BPL, but they cannot be listed therein as we haven't complete figures on number of messages originated, delivered and relayed, Let us have the dope next time, OMs. Traffic: K6BXW 871, K6EWB 848, K6DXD 292 K6DQQ 116, K6EVW 99, K6AVL 66, K6DV 50, K6CIp 29, K6BOE 20, K6BJJ 12, KGERH 11, K6ACR 10, Ks6acw 8, K6ERO 9, K6DYC 6, K6ALM 5, K6DPG 0, K6DUD 27 PHILIPPINES SCM, S. M. Mathes, KAICY~— This report received by radio via W6HM. It is impossible in this report to express in mere words how the PI gang has missed KAICY. It seems that everybody is blue. At the suggestion of KALHC the PI gang has moved to the upper part of the 7-mc. band in order to give the W's the lower part and thus avoid interference with traffic. KAIZA is going to discard his 500-cycle note and put pure DC on the air soon. KALHR is again climbing to the top. KAIE] went to Baguio with a portable set but nobody has heard of him since. KASAA is keeping regular schedule with KALXA KALXA is building an MOPA. KALPW was the last station to work KAICY in the Philippines and also the first one to greet him at WGHM on his arrival in the U. S. KALAC is on vacation in Japan. KA1DL has a schedule with W6HM twice a week. KA1DJ still leads the way in traffic, which is the outcome of many well kept skeds on 7143 and 14,290 ke Traffic: KALDJ 867, KA1JR 80, KAIPW 217, KAILHR 860. CHINA — This report sent in by radio via KA1JR and W6HM. ACSWB makes the BPL. AC9OHB put in new 210 with 400 volts on plate. Traffic: ACSWB 220, ACSRV 220, ACSAG 35, ACSTJ 26, ACUGH 28. ROANOKE DIVISION ORTH CAROLINA SCM, Hal §S Justice W4TS — W4JR is all set for some good A-A net work. W4AHH handled an important message through WFAT. Prof. W4DW operates consistently at State College. W4TS isa on when time permits. W4ZB was sick part of the month. It is with regret that I find it necessary to resign as SCM. I thoroughly appreciate the way you fellows have stuck by me. An acting SC M will be appointed to handle the affairs of the Section until a permanent SCM is elected. Very 73. Traffic: W4ZB 53, W4AJR 6 VIRGINIA —SCM, J. F. Wohlford, W3CA W3BZ attended the Directors meeting in Hartford. W3ARU is still the high traffic man of the State. W3CA is building rig for CW and fone with xtal control. W3BDZ is still tinkering with his phone outfit W3WO is on inactive list. W3CKL has finished VPI and will leave shortly for NYC. W3ZA is getting out fine with his fone since adding xtal and buffer stage. W3BGS threatens to bust some fones now that he has power at his place. W3HY will be at NKF part of summer. W3AAJ is active again. W3ALS visited W3CKL during Easter. W3AQK qualifies for an ORS. W3NO is President of Richmond Amateur Club. W3A MB is operating a portable from the Scout Camp. W3ABC is now an ORS W3ASA is operating a beautiful new 50-watt outfit W3AKV has a crystal controlled 50 watter. W3TJ and W3FE are heard on occasionally. Miss W3IB couldn't make the banquet because she had to buy a present for the boy friend. W3AEL and W3AEW are new hams in Richmond The Richmond Short Wave Club is taking a State-wide census of ham activities in preparation for a Virginia Con- vention in October Traffic: W3ARU 93, W3HY 17, W3ALS 16, W3AAJ 1, W3AMB 2, W3ABC 3, W3AQK 6, W3FJ 10, W3ASA 2. W4TS 15, W4DW 13, W4AHH 10, ROCKY MOUNTAIN DIVISION TAH-WYOMING Acting SCM Lewis D. Stearns, | | W6BTX W6RV and W6CNX are on 14,000 ke. for the summer. W6EKF has a commercial ticket W6DPJ leads the section in traffic. W7AAH is Net Control of Wyoming. W6BTX, present Acting SCM, regrets that he cannot continue in this capacity, due to his going to University of California for the summer for graduate work. Hereafter, all reports in this section should be mailed to Ws ws Ti Wil Pt May whic lin with som to VI who K4A Tr FI —W repol 8 tes Both ment na static band high- W4A W4M Com: hrst | Clear 112 h are t burn Detr Septe eune

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(930 4, but igures layed. 202 6CIB ACW D 27 a ssible gang ie. At © the 8 the AIZA * on ALE] ard of 1XA ation ne to AC is 6HM ich 18 ”) ke HR . and ¥ 21 O8TJ atice \ net ssage State . sick ssary nted SCM { 10, 3BZ s still zg for ering CKL sZA uffer ut he rt of CKL UO is ating RS utht and nake . boy ond wide Con- \J 1, arns, » ke ket ntrol that g to ork d to Juty, 1930 Cutler R. Miller — W6DPJ — 124 East 2nd North St., Provo, Utah. W6DP4J will act as SCM until election. Traffic: W6RV 11, W6BTX 2, W6DPJ 48, W6CNX 14, W6EKF 12, W7AAH 29 COLORADO SCM, C. R. Stedman, W9CAA— WoCLJ walks off with the high score. W9EAM says he will be off for a while on account of the fishing season. W9YL, a n operated by an old-timer, Mr. Cassell, is located versity at Boulder. W9CRS has a new wave meter. new stat atthe U1 WOEFP, a ‘phone man at Haxtun, sends his first report. WO9CAA moved to a new location. W9AAB is still on 7000 ke. WOCAB is getting the power supply straightened out. W9BQO is threatening to get on again, if he can get the necessary cash Traffic: W9CLJ 14, W9EAM 4, W9CSR 1. SOUTHEASTERN DIVISION LABAMA SCM, Robert Troy, Jr... W4AHP— A W4LM leads the state in traffic. W4TI sets a fine example in reporting by special delivery. W4AHP has installed 566 rectifiers. W4AAQ wants A-A traffic to pick up. W4AHR is busy with school work. W4JQ has joined the 4-A net. W4HB has moved to Birmingham. We are very sorry to lose W4ADN, who has gone to Atlanta. W4HI st Maxwell Field has a fine fone outfit on 1750 ke. W4AEZ shaving hard luck with his fone set. W4AKB is busy with his job. W4AJR is having receiver trouble. W4AK™M will be back in the A-A net soon. The SCM would like some reports m south Alabama, and a few more from Birmingham Traffic: W4LM 147, W4AAKM 17, W4TI 23, WAAHR 13, W4AAQ 135, W4AHP 11, W4JQ 10. GEORGIA-SOUTH CAROLINA-CUBA-ISLE OF PINES SCM, M. 8S. Alexander, W4RZ W4JL was nan a lent a short while ago and lost the little finger of his left hand, so guess he will be off the air for some time. W4SS and W4DV have their transmitters going on the 28- band. W4iAFQ has been very active in the Army- {mateur net. WiPM has handled last three months. Say, fellows, let's not let the summer vaca- tions affect us so much that our traffic total will fall far 307 messages during the below the standard. Let's try to keep the activities going during the su el Traff W4JD 48, W4AAY 34, W4AFQ 24, Wik\ s PORTO RICO-VIRGIN ISLANDS SCM, E. W. Mayer, KiKD We led the division in traffic for April, which speaks well for our small section. K4AKV reports l4 me. giving poor results. K4KD has rebuilt to MOPA with a much improved signal. K4DK is going to try 28 me nity, and I hope W4SI 32, Some interest is being shown in San Juan vi to visit the gang on my vacation and help those on the air who express their wishes. Delinquent ORS this month are K4AAN and K4ACI Traffic: KAKD 262, K4DK 144, K4AKY 1. FLORIDA SCM, Harvey Chafin, W4AII-W4PAWI — W4QL leads the section and makes the BPL. FB. W4SK reports a new amateur at Melbourne Beach, W4PU. W4SK s testing with a 3500-ke. fone. W4AKH reports for W4UJ. ioth of these stations are applying for an ORS appoint- ment. WiALH is keeping two skeds daily. W4AFT sends ina very fine total for a non-ORS. W4JO is section control station of unit 5 for the U.S.N.R. W4QV is on the 3500-ke band now with a 100-watt fone set. W4GD is building a high-power all-band transmitter with the MOPA ckt W4AGN, the Naval Reserve station, has moved. After WiMM read the new requirements of the Federal Radio Commission he installed two recto-bulbs, and worked his rt DX station, OA. He also reports for a new amateur in lear Water, W4RK, who is getting out of the state with a 112 high-power transmitting tube, Hi. W4AAKA and W4JM are the only stations reporting from St. Pete. W4TG is burning up the ether with a 100-watt set. W4W W is going to Detroit, and will be there until the U. of F. opens next September. W4MS was in Gainesville operating WiQA until J QRA,. W2XE’s une Ist, but is back in Pensacola at a new OST 57 QST of the Australian-New Zealand test broadcast was handled as the most important traffic at W4ADP this month. W4ABF has moved from the U. of F. (¢ ity to Or- lando, and his QRA is Box 836. W4OZ takes part in the U.S.N.R. drill on Thursday nites, and is also keeping a schedule with the U.S.N.R. station, WiQC, at Key West W4JM has quit all of his DX for a while until he finishes his MOPA set. W4AGY promises to have a larger total next onth. W4FV says that he only lacks one Euroepan QsO to qualify for a WAC certificate. W4ACM, the U.S.N.P station, handled quite a bit of tfc. this month. Mr. Jim Joyner has just received his commission for the Tampa U.S.N.R., and W4AII will be the Chief Operator very shortly. W4AKJ, W4BN and the SCM are using 35)°-k fone sets. Don Hawley and George Wells at Plant City have a station ready to go, and are applying for a license Traffic: W4QL 142, W4SK 108, W4AKH 63, W4ALH 61, W4AIL 59, W4AFT 52, WAJO 34, W4GD +45, W“QV 27, W4MM 19, W4ACM 46, W4AKA 20, W4TG 19, W2WW 10, W4MS 9, W4ADP 8, W4ABF 7, W40Z 7, W1JM 5, W4AGY 7, WEST GULF DIVISION KLAHOMA —SCM, Wm. J. Gentry, W5GF W5VQ is high manand not an ORS either. W5AUV wants to know what has happened to traffic. WSAYF reports a hot hook-up with W5ASQ. W50J made his first report. WSGF is operating at all times he can get away from business. The SCM would like to have more reports from the gang. rrafl W5VQ 111, W5AUV 14, W5AYF 2. NEW MEXICO SCM, Leavenworth Wheeler, Jr., W5AHI W5AOD has a new AC screen-grid receiver W5TV, with a prospect, spent part of one Sunday at W5AHI. W5BH reports a new station W5AUW on 7 mce.; also W5ZZG, ex-W6DMQ, on 14 mec. W9COL is in Albuquer- que, and is having his outfit shipped out. W5AHI slipped W50J 7, W5GF 3, despite five regular skeds. Traffic: W5AHI 112, W5AOD 86, W5TV 21, W5BH 1. SOUTHERN TEXAS —SCM, Robert |! Franklin, W50X \ number of the fellows are rebuilding to con- form to the new FRC regulations. It is with deep regret we mourn the passing of our good friend, Mr. Fred Kush, W5HS, of San Antonio. We extend our sincerest sympathies to his family. W5AB-W5BBY is the possessor of a nice new ORS certificate. W5VY-ZG reports handling much traffic. W5TD now boasts a completely AC-operated station W5BKW turned ina nice report. W5EI has been doing some nice relay work with an ORS certificate in view. W5BHO is still having trouble with his speed. W5JR has been experi- menting with screen-grid detectors. W5BOC is a new station in Houston. W5AEA has been letting golf take up most of his spare time Traffic: WSBKW 51, W55I 34, W5BHO 14, W5TD 8. NORTHERN TEXAS SCM, Roy Lee Taylor, W5RJ I sincerely thank all of you for your votes and the con- fidence you have shown in me by electing me SCM. If I can come near our past SCM, Mr. Robinson, W5BG, in his I s, I will have done well. W5WW leads the section with a whale of a total. W5HY did storm relief work in the recent Frost, Texas, disaster, advising W5TM in Hugo Okla.. as to friends at Frost. FB! W5BAM is doing F.B. 0.0 work. W5BAD said the recent tornado took his shack for a ride. W5BG is keeping a sked with KF R6. W5AAE is work- ing both coasts with a 201A on 7000 ke. W5BNN is a very promising newcomer. W5BBF reports. W5GZ expects to make up for lost time when the school closes its doors W5RJ is rebuilding to crystal control. W5LY wants wall paper badly from some of the boys he has worked. W5BND is building A.S.G. received. W5AZP is having a hard time raising stations Traffic: W5HY 11 W5BNN 3, W5AAE 6, W5GZ 2, WS5LY 1, woww SS, WSBBF 1 report 3, W5BAM 27, W5BAD 18, W5BQ 12, W5RJ 20,

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CANADA OST —— f Radio, Department of Marine at red the use of telephony in the sing this band for fone work » have a visit from your local ho will, on being satisfied after the station complies with the re- i rse the license / dsummer season, I notice a big | tr » totals. Your CGM would like to l bers the importance of being week during this period. More ng on each week for our weekly you operate only one evening of t Wednesday night for contact with IAN GENERAL MANAGER x Rem, VE2BE QUEBEC DIVISION \ CM, Alphy Blais, VE2AC—Our ( 3 E, went to Hartford on May 2nd and x the meeting of the A.R.R.L. Board of ir most active station. The X\YL er first message. Look in this QST rrangement of VE2CA’s statior B is going strong as ever. VE2BZ has ime. VE2AC was busy getting ing, but he'll be on the air regu- » future XYL operator. VE2AP has exams. VE2AA is still chasing these I would like to hear from anybody iteur. Possibly we can give the peed them through their first steps VE2BE 26, VE2BB 15, VE2CA 12, ONTARIO DIVISION . > | Thompson, VE3FC — ( ) trict: VE9SAL leads the way in traffic h. VE3SGT worked VK using 4 201-A he TNT circuit with but 180 volts on l hammering away with his single p Muskoka with a portable sta- August. VESVS is getting ready to vhere he will operate a station at restry Branch Fire Ranger Service f ise ‘phone on the 14-me. band VE3DD has vamoosed for the Forestry VESDA is busy with the militia Lawrence, VESET, ASCM — Our nga grand time on 7 me. VE3BD E3DM is rebuilding to TNT. VE3HU ter than ever on 7 me. VE3ET paida nd VE3HD, and was treated roy- vith VESAR is not working very well. e B batts in favor of a transformer and ved and, for the summer, re- 1 to him at Norembegs, Ontario. GT 30, VE3VS 10, VE3CB 8, \ VE3HD 4 PRAIRIE DIVISION SCM, A. V. Chase, VE4HR— I ed from Winnipeg. His new QRA Alta. A welcome reappearance on the air E4DY. VE4RR has been assigned the E. VE4HV would like QSO with the VE4GL has now got his TPTG VE4DK has gone to Camp Borden for flying. VE4JB has been getting tests. VEADY promises ng 2S-me , VE4HR 9, VE4BU 3, VE4DY 1, JULY, 1930 SASKATCHEWAN — SCM, W. J. Pickering, VE4Fe — VE4BB is now an DRS. VE4BX turns in the best mes. sage total. VE48L follows close behind. VE4EF has left f r Winnipeg. VE4GR reports a hamfest between the Saskatoon and Biggar gang at Biggar. Spring work and rotten weather have kept VE4IH out of the traffic. VE4GO is building g new power supply. VE4FC is on when time permits VE4HO and VE4HY have amalgamated rraffic: VE4BX 17, VE4BL 16, VE4GR 1. VANALTA DIVISION RITISH COLUMBIA SCM, J. K. Cavalsky B VE5AL — VESAJ is continuing to broadcast weekly bulletins of local doings in the Ham game. VESCF M4 burning the midnight oil over the Bert King, the famous Java King of VE9AJ, is leaving for the South, and wish him the best of luck. VESBE is ; again after plenty of remodelling. VESBC has junked his screen-grid receiver, VESCR still keeps his set perking VESEF has been heard on fone. VE5AL worked a balloon and a ship, and is now looking for a submarine. Hi. From Prince Rupert we learn that VESGT is making his Xtal perk with nice results. He was visited recently by VE5FI. VESCM has gone to sea. VESDX nice work. Victoria — We our congratulations to VE5CO, who is being married shortly. VES5DU is hitting out fine with his TPTG. VE5EC says his old 202 has lost its punch, so is putting in a 210 New stations in the city are VE5SAD, VESHR, VESDY, VESHP and VESCB. VESHR is using a 201A. VE5AD is on 35 and 7 me VESCB is going strong with a week-ends. We regret that is doing offer using a 210 201A. rrafie: VE5AL 24, VESCF 9, VES5CR 3, VESGT 12 VESHR 5 ALBERTA SCM, Fred Barron, VE4EC DX is with us again, gang, in spite of the poor weather conditions VE4EA worked two ZL's and a K6. VESGD hooked up with OA4Q on 14 me. VE4BQ, formerly active in the South. Ex-VESAI is awaiting a VE4 call VEACE and VE4I0 are looking for DX, or what have y Mrs. VE4EI again tops the list for traffic. VEA4GK sends ir a nice traffic total. VE4BV has been receiving some very pretty poetry. Hi Hi \ E4BJ is a new local. VE4GY is alsoa new ham at Fort using M. G. VE4DZ is QRT, due to lack of time. VE4AF is still working with Xtal control. VE4H M is active when possible. VE4HC says things dead around his shack. VE4EC has not been doing much, but always expects to. Hi Traffic. VE4EI 29, VEAGK 21 f Winnipeg, is now Saskatchewar MARITIME DIVISION YEWFOUNDI AND Acting SCM, E. V. Jerrett | | VOSZ We take pleasure in congratulating 4 VOSMC, our first W. A. C. VOSWG is coming South, and hopes to visit most of the local boys VOSAW gets excellent reports with his new rig on 14,000 ke. VOSM(¢ has begun experimenting on 28,000 ke. VOS8Z put up a new voltage-fed Hertz and worked Argentina on 14,000 ke Ge Strays “SS. Boyd Phelps, known since 1921, as BP, appro- priately has the call W2BP, and spends his summers in Minnesota where he operates W9BP. He says the formula for getting the same call as your initials is to wait until the chap with the desired call dies, then get him to sign over his old license (We want more information on this point, BP.), hold it until it has expired one day less than six months, have no other station license, file a new application with the expired license, and pray. In disclosing this we hope mortality will not be increased among us because we hold a much coveted call. Ju ON wiaa wlac wibv wiqv wae wlan war. w2bil w2cu wizg w3au wigq wSbf wScu, w9asl emdu py2by vetic vk3p: m5 ; won klce acdsgo vk5m, acSls kalhr liva W8H ce2ab m5cx ttlep earl e da f Nigb | find f gis g gixb x idk | kir5 k lu3dh lu5dj j2pa nthe palaw py lak py2em

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.930 +P mes- ft for atoon ather ling a Pmits rrett ating ming SAW S\IC | new not yuch Juty, 1930 ON R470, VM. de Waepencert, 22 Rue des Soeurs- Noires, Termonde, Belgium 14,000-ke. band wlaao wlabe wlaeb wlaf wlafd wlagi wlakg wlamq wlaqt wlasf wlav wlaze wlbft wlbhm wlbjn wlbke wlbux wibwa wicaw wicek wlcow wldp wlez wljv wllg wimp wiqv wiry wluj wlvz wlwe wlwv w2aaw w2acd w2adp waaeb w2aey w2afr w2afu w2ag w2ahz w2ait w2ajb w2ajj wamm w2amr w2a0c0c w2aow w2aocy w2aqi w2arb w2arj wary w2auu w2aww w2ay)j w2bih w2bka w2bla w2bok w2bon w2bru w2buy w2bbp w2bda w2bey w2bia w2bwe w2euq w2el w2fp w2ku w2mb w2o0a w2ov w2qn w2rs w2sn wizg wadh lz w3afu w3ake wiauo w3bhv w3dh w3jr w3ln w3bm wdaef wiakh wdakt wigq wigw w4pz wiql wSadm wSbbp wSbct wSbez wSbaz wSbkp wS8blh wSbsl wSbww wSced wseug wSdld wSdpo wSdxo wSea wSem wShx wSkr w9an wObba aulbz waar w3aog waqi wat) wabf wShbiv wSccw woasl waze wObvf w9cix wOmt ecnSrux em$uf fmScr fmS8fs fmSrit fmStui lu9dt nj2pa pyled py2ay py2bg velas velbr velco veldr ve2bb ve2bd ve2ca veibd velic veSao vk2av vk2lx vk2 vk2rx vk2wu vk2xw vk3go vk3pa vkirb vq4cre voSme vu2zx su&rs zl2beg zl3as zl3bb w5d zs5n zs5Sw zt5r H. of Peterse rn, “ Pribe,”’ Oste rgade, NA orre sundby, De n mark 7000-ke. band Heard in Sumatra wheqf wielm whac wiawp wpm klixa klize klee kIpw klhr kley klel kldj klem klhe ac2ff ac9gh j3ck omitb pk3pr vk20w vk2hm vk5hg vk5wr vkimj vs3ab vsiah vs7ap wojn whdea acSgo eslab Heard in Singapore, F. M. 8. acSls fo3sr Heard in Indian Ocean kalhr kalce vk2lv vk6wi vk3dx Heard in Suez Canal liva ear98 fSrsb ilfg oh2kz on4uu paouv WSHX, C. G. Mellor, 274 W. Calthrop Ave., Syracuse, N. is 7000- and 14,000-ke. bands jaa em2sh ecm2jm em2jt em2yb emSby fl emSuf emSqb cmb3 ctlaa ctlbd ctlbx ctlby tlep ct2aa ct2am ct3ab cxlaf ex2ak cx7 d4fabg d4xn tarl earl1O earl13 ear21 earl52 fSag {Sbha fSbtr fSes fSct ida fSdhf fSdme fSdot fSef fSer fSex fSfr f$gdb fShr fSjq gb fSlx fSoa fSolu fSpam fSprw fSrex fSrhj fSsun fSswa xd fr e2ab ce idg ce3dj ec m5cx Ser fmSgke g2ao g2bm g2dz g2ef m g2ip goby is giml g5ms g5yg g6ia g6lb g6lk g6pa gérb givp g6wt gixb gtixq hafSb helfg heljl helle he2jm illl k4aan k4dakv idk kikd k6boe k6ewb k6eqm k6ialm k6bhl kalsr kalre tr5 kfré lulba luljf lu2aa lu2ad lu2bj lu2ca lu2dj lu3de dh lu3fa lu3fk lu3oe lu3pa lu4da lu4dq ludbz ludch u5dj luSdjq luSdy luSen lu9ce lu9dt nnInic nnise nn7e j2pa oatj oad] oadp oa4q oadt oh7nb on4ip on4ft on4gn nthe on4jj on4jk on4jx on4ka on4ro on4tuu ozlk o27y Paw paOgf padzf pxl pylaa pylah pylaw pylel pylem py lak pylii py2ad py py2be¢ py2bk by2em py2ig py2ih py2ik py2qb py3ah qqla rxlaa snlaa ay py2ba py2bf OST Calls Heard. splae su6w ti2ea ti2fg tglje velal velam velap velar velbr velce velco ve2aa ve2ak ve2ap ve2ak ve2ar ve2bb ve2be g ve3be ve3bq ve3cm ve3dr ve3eo ve3it vesta veibe veibq vetcs ve4ct veicu vetck vetek vetel vetfe vetix vetgf veigo ve2bn ve2 vetai velal vetbe vetcx veidq vetec vethg vethr vethx vetic vetdur ve5al ve5ao ve5aw vedbl ve0s) vk2ay vk2hk vk2kj vk2no vk2rf vk3ac vk3es vk3go vk3jk vk3kl vk3pp vk3rg vk4bh vk4eg vk4dh vk5hg voSae 2r x9a zllaa zllak zllft zi38am_ zl3bb zl3bt vo8an voSaw voSme vq2bh xlg ] zi2dg zi2gl zi2gq zl3ao zp7ab zslp zs2n zs3r zs4a zs4m zsin zs5u ztlj ztlr zt3am zi2ab zl2a ztor zuld zu6n W9IBFW, Chester Rector, R. F. D. Ind, "Phone ban No. l, Tipton, 3500-ke wlaby wlamq w2baj w2boz w2bqy w3aex w3aid w3ain w3ani w3dsz w3ev wi4ce witeoh w4hn wiid w4pd w4qz wivk w5aw) w5er w5kx w6das w6kp w7ac) w7ce wSadx wSahz wSajh wSakf wSaof wSaou wSarh wSbae wSbf wSbie wSbik wSbir wSbiz wSbuw wSbyr wSbzo wScjd wSck wSclx wSemd w&csa wSevr wSdbq wSdiz wSdoc wSdnd wSdsl wSdsn wSdwx wSfn wSha wSia wSjh w&rd wSwf wSwm w9aid w9auv w9bbz w9bei wIbiw wI9byp w0daq w9dtu w9dwi w9efw wea w9eng wietd wfke w9fle w9frr w9get w9ghx wOmke w9mm w9qy ve3rf wSawl wSazo W2BER, David Paxton, 15 Thompson St., Troy, N. 7. 14,000-ke. band whazl whetp whevb whakf wé€ban wibkw w6blx w6box w6bto whchy w6dbt widgn w6dgq w6dmk w6dpa w6dte wé6eg! w6jp w6kb whkt w6kv whac wéacl whamp w6an w6ace whaqaq whepb w6ep: wieug wheup w6hv wé6id w7aew wait w7amo w7Z7anx w7ek w7if w7)c w7mu w7qy wisg wity vedao veSaw ce3ag ceS5aa cmS8uf fSef fSex fSfem > {Sfr fSes fShr fSleb fSprw fSrex fSsm g2gm he2jm k4kd k6ctf oa4j on4fp on4jj on4us x9a W9AZY, Carl Newman, 402 Tenney Louisville, Ky. 3500-ke. ‘phone w6bik w6eme k4dk k4kd k5dd k6avl k6dv k6eqb k6ewb zilaa zllfe zllfd zllbn zl2ac zl2bg vk2ns vk3bq vk3es vk3ls vk3pp vk3wx vk4bh vk3hl vk3ml vk5wr vk6sa vk7ch helfg okina fSer fSrit {Sxz nn7c wia sslap pxr goby Ave., NIDN, Delbert Miller, aboard U.S.S. Tennessee, Guantanamo Bay, Cuba 7000-ke. band helfg kalce kalhr kalpw kaldj k4qv k4acf k4kd kfr6 nninic nnise sslaz vetgd vk2jk vk2ow vk5fr vk7ox vk2ev vk3pp ve3dd kaldo wlcow wicte wimk wiry wlags wlbbz wlbil wird w2aof w2cxl w2amr w2bo ubG «gw5Sby w2bau w2are w3anh w3aws w3adx w3bm w3ant w3mv w3asw w4nn w4gk w4dr wd4aik w4qv w4ct wiakg w4lj wiis w4ahq wiaeq w5ain woann w5bij wobah w5es w5ic w5rx w5se w5sy w5sav w5bhq w5bki wo5wu w5aea w5aap w5bkg w5aqx w5lva w5aao w5pa w5cbx w5bld wé6edt w6ait w6alx wO6ami w6amw w6aoca w6ata whaw whawe Y ; J on na (Continued on page 74)

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OST JULY, 1939

Correspondence The Publishers of QST assume no responsibility for statements made herein by correspondents.

The New Regs From an O. O. Editor, QST: As an Official Observer, I have sent out more than 200 cards to off-wave stations during the past six months, and while engaged in this work it has dawned upon me that a little comment on the subject of answers to these cards is in order h elated over the new regula- they are a decided step for- pt a log of every transmission I went on the air, and don’t ean operate with any satisfac- ning one ut the new rules — I am one of no filter but a rectifier, so must Hi! Good-bye r.a.c. for me, and he others with r.a.c. and a.c. do accidently out of the band and will be found where they belong in the future. Fine; that’s what we want to hear Now here is where the rub comes in. A great V H Gra lee, W4AG venience of the O. O., and be sure that they really \X.V’s Transmissions valuable service and I, for one, ” (*” frequency meter as described IST and I use all the standard issions to check up on its ith your call We appreciate that no one likes to be accused of off-wave operation who isn't week guilty, so naturally we listen until! certain of the ) the staff at WIAXV call. — J.T. Dowdell, WSDSA 2. If your call was heard and you were not operating, write the O. O. and tell him, but don't ask him to hunt the pirate. Notify your super- An Invitation visor. He has men to check up on unlicensed operation. The ©. O. is glad to get the letter and pstow Road, Croydon, England know you were not guilty, but hasn't time to play detective through the medium of QST, 3. If you have some technical questions or welcome to Croydon, all trans- want some information, enclose a_ stamped, tend visiting England during the addressed envelope; the O. O. will appreciate it, and I'm sure he will be a good sport and answer Croydon 2578 any day about it if possible. Of course, if you want to know will do our best to give all a real about adjusting a transmitter or anything of that sort write to the A. R. R. L. Technical Informa- — Geo. G. E. Bennett, GiBZ, tion Service or to some other information bureau, A. L. OHefferman, G5BY, or better still ask some nearby ham to help for “The Croydon Gang” you, but be sure he knows the construction and

_ Kennedy, Ala. Sorento, Il. PT Ay Many amateurs write and advise that they were Dire < many of them will write, and in doing so will § On: ng, for 1 know we will have more , , Set hi request answers to their letters and in many : ent if the bands are not crowded a eels “ Pe. 1. S cases some information; now if these hams want + m answers they should be courteous enough to put phar’ in a stamped, addressed envelope for the con- consol need answers before writing. Although we all Joonsol like to correspond with our friends of the key and 4. ia ie te il Bae etal Made 1) otter: ou ki Saranac Lake, N.Y, ‘mike it will be appreciated that 50 or 60 letters aA in a month take stationery and time, to say regula te that I took advantage of nothing of postage. All this comes out of the fing du to measure any amateur fre- O O s pocket —- a or it in the May issue of QST For the benefit of those who are profiting by wi S suns. Sees , — f a 6h on the May 2nd, Friday evening © work, I wish to list the following points: apres: 1. When we say your call was heard, that call ‘Ni was the one. There is no guess work ; we check and Biyacke re-check and (as Andy tells Amos) ‘‘double- feat w check,’ so if you were not on, someone was and ac

SII

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0, Ill more g the ork it nt on yrder were found that’s great >» will many want O put con- really re all v and etters ) say f the 1g by it call k and yuble- was likes isn't of the e not don't uper- ensed r and ne to ns or nped, ite it, nswer know f that yrma- ireau, help n and Three Screen- Grid Tubes Direct Tuning On the market since June Ist, the S-M 770 Auto- Set has proven itself to have everything: 1. SENSITIVITY 2.5 to 14 microvolts per meter (an average of 8 over the broadcast band). That’s one of the things that makes possible real cnsole- model reception. 2. THREE SCREEN-GRID TUBES — giving you cnsole-model wallop. 3. SCREEN-GRID POWER DETECTION as you know, five times better than a °27 detector! 4, ABSOLUTE TUNING directly through a regular S-M 810 illuminated drum dial, eliminat- ing dubious control through a ‘‘remote’’ shaft mother feature exactly like the finest console. 5. SMALL SIZE 12 inches long by 7'4 inches high and 6'4 inches deep a pocket edition apressly designed for its job. 6 NO CUTTING UP THE CAR — mounts on tackets under the cowl to the right of the driver's sat where the dial and controls are easily seen ind accessible. signed to lick anything in the short-wave class, the737 Bearcat does and how! It has two screen- tid tubes — will reach out and drag ’em in by the eels — is plenty selective and you can spread hteham bands without taking the set apart and rowing half of it away. It’s completely shielded -has its own cabinet and its own built-in wer supply! fight specially-designed plug-in coils (included next 12 issucs. Write for information on the franchise. You'll Know When You Hear It—This Is The Real “Auto-Set” 4,000 Authorized SM Service Stations are being operated. S. G. Power Detector Sensitivity 7. SPECIALLY DESIGNED SPEAKER — 9% inches wide and only 3 inches deep, magnetic, with matched impedances, fitting under the cowl to the left of the receiver. 8. RESISTANCE-COUPLED DETECTOR — giv- ing fidelity fully equal to modern full-size re- ceivers. The S-M Auto-Set was designed by the world- famous Silver-Marshall laboratories to give abso- lutely everything regardless of price — but the price is remarkably low: S-M 770 Auto-Set complete, except for tubes (3-’24, 1-"12A, 1-"71A) and speaker, $79.50 list. Parts total $61.49 list. S-M 771 Auto-Set Accessories, including all necessary installation equipment except tubes and batteries, $17.50 list. S-M 870 Automotive-type Magnetic Speaker. Complete with mounting brackets, $15.00 list. The New Short-Wave 737 Shows What a ‘‘Bearcat’”’ Js in the list price) cover from 16.6 to 200 meters — all foreign and American short-wave broadcasting as well as the ham bands. Four extra coils ($5.50 list) cover the American broadcast band. What more could you ask? Tubes required: 2—'24, 1-’27, 1-'45, 1-’80. 737 Short-Wave Bearcat, completely factory- wired and tested, less tubes and speaker, $139.60 list. Parts total $109.50 list. The Radiobuilder, Silver-Marshall’s publication telling ES the very latest developments of the laboratories, is too valu- Silver-Marshall, Inc able for any setbuilder to be without. Send the coupon fora 64¢ ( ( ( S.A free sample copy. If you want it regularly, enclose 50c for pe 09 West 65th St., Chicago, U.S. A. Send your latest catalog, with sample copy of the Radiobuilder. 4c enclosed; send Data Sheets on 737 and 770. » WEST ST. ....10c enclosed; send five new S-M SILVER-MARSHALL, Inc., Sicaco. Oa A. Data Sheets (including the 737). Say You Saw It in QST It Identifies You and Helps QST’

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RADIO Z TUBES Where Tube Similarity Ends —and National Pe ypu larity Begins Quality is enhanced by comparison. That’s why Cunninghams always come up smiling. E. T. CUNNINGHAM, Inc. NEW CHICAGO SAN FRANCISCO LLAS ATLANTA Ss Ja a a a a a ae ZY ZLZAEEEE EES y You Saw It in QST It Identifies Y« operation of radio apparatus himself don't. 4. A notification that your station was off. wave does not mean that your license, O. R.§ certificate or anything else will be cancelled, but don’t be careless about it, for after three or four some reports showing continued off-wave operation4 in the face of notification this is the best you can expect. Always answer an off-wave card, for that is the only check we have; and unless you do we take it for granted you were operating, If you were not, and we do hear you later off wave, you get two black marks where only one is deserved. 5. The observer isn’t trying “to get something on you.” He is trying to preserve your operating privileges and the privileges of all other amateurs, and you should consider that you are lucky that the R. I. didn’t happen to be listening in instead. I have any number of very friendly letters from the many hams I have notified, and ap- preciate them very much. I have answered a number of letters requesting information and am glad to help a brother ham whenever possible. Considerable time is spent here in checking, and this comes off the time I might be working myself; thus you can appreciate why I must be brief in handling notifications. One point I must add here: a great deal of off- wave work is the result of using one of the con- denser and coil frequency meters and having enough error in the check to spell the difference between the right and wrong side of the fence A heterodyne frequency meter is the best bet, and no ham who uses one is found off-wave, providing it is properly calibrated. We must get inside our bands and stay there. The O. O.’s are doing their bit; give them your cooperation. — T.R. Pugsley, WOBNR A Lucky Chance Editor, QST: A couple of months ago, we happened to be in Cook’s Strait, New Zealand, en route from Auckland to Wellington. While in Auckland I had visited ZLIFW and some of the others and be- lieve me, they treated me fine and came down to look over the are on WQBV. The other night after leaving I was listening in on the old short waver and heard my friend Earl Wiseman of W6BBR working 1FW. Eric told him that W6CHT had visited him the night before and after signing off, Earl called W6BVS, another member of the Hollywood gang, and told him I was in New Zealand. ‘Well, that’s fine,”’ said Bivis, ‘maybe George is listening to me now. Hello OM.” and he sent a nice long message with all the latest dirt. Maybe that didn’t make me feel FB! It was just like a letter from home and had not been prearranged. BVS just had enough faith in his old fifty to try a “blind” message, and it got through. — Gearge Derry, W6CHT, WQBV u and Helps QST

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UI Protected vent, vulcanized in hard rubber top, forming one-piece oa or J = TWN® EY Pressure seal, with no possibility of cutting gasket a! x. gb One-piece anode of pure slum- imum, no welded o riveted joints. ving ‘ interne! short circuit ence nee and ding aDé< Individual container allowing spece to be utilized with mexi- mum Rexibility. ere. Screw type socket mounting for maximum flexibility in receiver design o be , Locking lugs in socket to prevent from condenser shaking loose during shipment had l he- n to

ning iend Eric oe Papacit ) one ws Buk Voltage n his FVODC xot [in Negative QBV ere you SEE why its Years Ahead UST glance at the diagram here, and you'll see Sprague superi- ority at a glance. Notice the exclu- sive, one-piece, round-edge anode —no soldered or welded joints either above or below the solution. See the breather vent sealed by a soft rubber nipple, inseparably vul- canized to a hard rubber top—an absolutely leak-proof one-piece construction. Don’t miss the screw threaded, individual mounting—adapting the Sprague condenser to all types of sets. And then bear in mind that its 8 MED capacity is concentrated with- in a space of 1%” diameter x 5” overall. Giant capacity in midget size. SPRAGUE SPECIALTIES COMPANY QUINCY (Boston) MASS. Manufacturers also of the known SPRAGUE PAPER CONDENSERS “| peel Oe CONDENSER Say You Saw It in QST — It Identifies You and Helps QST

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Visi day fic Visi other pl ste with AT \L CARBON CO., we EVEREADY RAYTHEON TUBES FOR TALKING PICTURES, TELEVISION AND ALL INDUSTRIAL PURPOSES Raytheon Foto-Cell is a long-life r talking pictures and tele- ling new industrial uses every testing, color matching, auto- itrol of illumination and many ndard types, or made to speci 1ytheon Kino-Lamp, for tele- uniform glow over the entire ductive qualities are perfect f mirrors or ground glass. R interested in talking pictures, Cell applications of any kind. Raytheon Technical Bulletin l ith the Kino-Lamp, and No. 2, (o's oldest commercial feature, day evening at nine (New York ra nation-wide N. B. C. network INC. Offices: New York, N. Y. ! go Kansas City New York San Francisco and Carbon le | Corporation EVEREADY RAYTHEON Trade-marks Say You Saw It in QST — It Identifies You and Helps QST CQ Again S38 Hauser Blvd., Los Angeles, Calif. Editor, QST: If | am not mistaken there was once upon 4 time printed in QST a letter upon the subject of ‘‘CQ”’. Judging from the noises in our 20- and 10-meter bands I think it’s about time for another one. A “CQ” is all right in its place, and there are times when rather long calls are justified. How- ever, there's a limit. My particular pet peeve is the lad who persists in blatting out a string of “CQs” from fifteen to forty in length. His usual procedure is to slur the signature a couple of times, and then start another series But this pest is not the worst. The operator who really deserves the guillotine is the one who breaks the monotony of his endless “CQ” with drawn-out inserts of ‘“‘dah did dit, dah dit dit daahhh — .” He usually pulls this stunt during those limited periods of the day in which DX is good, and consequently time is rather precious For goodness sake, gang, let's see if we can’t get rid of these nuisances. And in the meantime, let us limit our own “‘CQs” to not more than five without a signature, and let's be especially care- ful never to “CQ DX” without immediately signing our call and hence indicating what is DX in relation to our QRA — J. Lee Smith, W6AWP QsP 1216 Utah St., Toledo, Ohio Editor, QST: There is a little matter which I have had on my mind for quite some time. I am an old ham, having been in the game way back when and therefore ought to know what I am talking about. The matter I wish to speak about concerns the old custom of handling messages It seems that some hams have absolutely no scruples about messages at all. They will cheer- fully take one and then as cheerfully forget about it. They don't care whether it gets to its destina- tion or not. What shall we do with this kind of a ham? The answer is, nothing, because it is a matter of honor and nothing else. We give a mes- sage in the faith that it will be relayed in the near future; but whether it is or not we do not know. Just the other day I was talking to a ham about this matter and he said to me, *‘I'll tell you what I do with most of messages.’ He said, ‘1 throw them in the wastebasket.” Now, I ask you, is there a spark of manliness in this kind of an operator? I think he is a dis- grace to the fraternity. The least a ham could do would be to say that he does not want to QSP and let it go at that. With me it is a point of honor to get the mes- sage away, no matter if I must send it by mail Recently I had a message for California and could not get rid of it so | sent by mail, since it had to be there by New Year's. One thing | always tell my brother hams is that if they ever give me & message, they can depend on its getting through. — Spot Neubrec ht, WSBTM THE nce! engine Ober _- _

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Calif, On a bject - and ther P are low- ve is iz of His uple ‘ator who with dit ring DX ous an't ime, five are- te ly t WP Yhio on im, ing rns RT. be i. NEWEST DEVELOPMENTS IN RADIO LEVISION AN Gees YOU TO MAKE MONEY AND (TS SERVICE KEEPS KO ey ON THE R. T. I. adio now offers ambitious men the greatest Money-Making Opportunity the world has ever seen! Hundreds of trained service men are needed by radio dealers, jobbers, and manufacturers! 4 “‘trained’’ Radio “Service and Repair” man can easily make $40 to $50 a week, and it’s very common fora trained man with experience to make $75 a week and up. BIG MONEY for spare-time Radio Work is easily made in every city and village. You can now ay for this Big-Pay work quickly through R. T. I. Get the Big Money Now and go up and up in = Big Pay field. The Radioindustry calls for More Men, No Experience Needed ALL YOU NEEDis the ambition and the ability to read and write, The Radio industry needs practi- cal trained men. Remember, R.T. I. makes it easy to earn spare time money while you learn at home. More to come and R. T. I. supplies what the industry wants THE MEN who get into this Big-Money you to know. field now will have an unlimited future. Why? Because this billion dollar Radio in- Supervised by Radio Leaders R.T. 1. trainingis prepared and supervised by prominent men in radio, television and talking picture engineering;distribut- dustry is only afew yearsold and is growing by leaps and bounds, Get in and grow with it. $10 to $25 per week and more is easily made in spare hours while you are preparing for Big ing; sales; manufacturing; broadcast- Money. TELEVISION, too, will soon be on the ing, etc. These men know what you market, so the leaders say. Be ready for this must know to make money in 7 aang new money-making field. Remember, Radio. You learn easily in spare R." 3in 1’ home-training gives you all the de- aioe in Television and Talking Picture Equip- ment, together with the complete Radio training, R. T. I. Book Now FREE time at home with the R. T. L. wonderful combination Testing Outfits, Parts, Work Sh 1eets, Job Tickets. It is asy, quick and practi- Warning ¥ eal. a covers every- P _ a thing in Radio = Do not start R. T. I. training includes Talking if you are going to be satisfied ‘ Pictures and to make $15 or $20 per week more The thrilling story of . Radio, Television and than you are now. Most R.T. I. men will make that much increase after a few weeks. There is no reason tostop short of the Big Money Jobs or the Big Profits in a spare time or full time business of your own. No capital needed. Get started with R. T. 1. now. Make money while you learn at home, the latest in elevi- sioa. Talking Pictures is told with hundreds of pic- tures and facts—itshun- dreds of big money jobs and spare time money- making opportunities everywhere. Send for your copy now USETHE COUPON, Dept. 10B, THE R. T. I. AOVISORY, BOARS. These men ar import ant meerns in , y manufacturit icasting, 2 engineering, et et Phey supervise R W kets, and { Name .._..______. i 4 Address snanisttin wy T I. R. T. 1. TRAINS YOU AT HOME FOR A GOOD JOB OR A PROFITABLE ee S PART TIME OR FULL TIME BUSINESS OF YOUR OWN , City Sher trait me 1 4806 St. Anthony Ct. RADIO & TE LEVISION INSTITUTE Anthony Court, Chicago Send me Free and prepaid your BIG BOOK “Tune In On Big Pay” i three-in-one Home Training (without obligat- ling mein any way). 4806 St. Let F. H. SCHNELL and the R. T. I. Advis- ory Board Help You Twenty years Radio ex- perience. First to es- tablish two-way ama- teur communic ation with Europe rmer Traf. Mer. of Americ an Radio Relay League, Lieut. Com, U.S.N R. Inventor, designer, con- lting Radio engineer. Assisting him is the R. T. 1. Advis ry Board mposed of men prom- nt in the Radio In- lustry. These men know Radio and will help you ceed in their field. RADIO & TELEVISION INSTITUTE Dept. 10B Chicago and full details of your State

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a. HATOUMENT Copy Weston Model 506 Resistance Meter V y ON announces a miniature trument for radio service men’s is Model 506 Resistance neans of this instrument di- tions can be obtained of lues from 10 ohms to 10,000 also be used for making sts. 1 506 Resistance Meter op- two flashlight cells or any C. supply. To use this only necessary to make a it of the meter, the 3-volt i the resistance to be meas- enclosed in a case for flush has an etched “ volt-ohm”’ be mounted on a panel or ble unit by placing it in a ther with the two flash- trument is panel type information and prices, to the factory, Radio Dept. Weston Electrical Instrument Corp. 6 uysen Avenue, Newark, New Jersey Weston» oN PIONEE Rs SINCE 1888 IN: ST RUME) TS | Say You Saw It in QST - > - It Identifies You and Helps QST LA.R.U. News (Continued from page 46) de Neck, we will be glad to receive opinions from the other sections. BRITISH NOTES By J. Clarricoats, G6CL, Honorary Secretary, R.S.G.B. British amateurs join with those of the world in expressing their sympathies with their German colleagues in the untimely death of Dr. Wilhelm Titius, the illustrious Editor of their official organ ‘‘CQ.” Such losses are inevitable, but the gap left is always difficult to fill; we sincerely trust that one as keen and loyal to the Amateur Cause will shortly be found to take his place. The results of the British 28-mc. tests are al- most complete, but the difficulty of making a thorough investigation of each claim has re tarded the progress somewhat. We can, however, announce that Mr. J. W. Mathews (G6LL), the best known of all British ten-meter amateurs, has won the Powditch trophy. Mr. Mathews’ success and the success of the tests generally was only brought about by the whole-hearted coéperation of the amateurs of the world, and through the medium of these notes we thank all who have assisted us in this organized attempt to probe more deeply into the mysteries surrounding the 28-me. band of frequencies. To our President, Mr. Gerald Marcuse, we owe a debt of gratitude. Through his efforts we have been granted permission to operate our stations between the hours of 1500 G.C.T. on Saturdays to 2400 G.C.T. Sundays, in the wavebands around 75 to 85 meters. This permission is granted to all holders of Trans-Oceanic and will be extended to such others of our members who apply through the Society. We hope the opening up again of this band will result in the removal of much local work from the overcrowded lower bands. Conditions on the 7- and 14-me. bands were in general worse than previous years. No important work has been recorded. We have the pleasure of stating that the B.E.R.U. continues to extend at a rapid rate. Iraq is now a firmly established link in our chain of Empire groups. We shall be glad to forward particulars of membership to anyone interested. Our Head- quarters are at 53 Victoria St., London, 8.W. 1 licenses We had the pleasure of a visit at Headquarters from Mr. J. L. Leistra, PC2, of the Hague, Hol- land, during the writing of these notes. It was & most enjoyable occasion for us. Moc tor - teul they ful Its 400 radi watt aud: of U at 3 ply ara the Rad pu rT R¢

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tary, a= al- ig a re- W. itish itch the the the 3 we ized owe ave jons lays nds : of | to ugh : of eal

RCA Radiotron UV-85l A General Purpose Tube for High-Power Amateur Stations Modulator, Power Amplifier, or Oscilla- tor—in whichever of these ways ama- teurs choose to use Radiotron UV-851, they will be delighted with its power- ful behavior. Its ability to modulate without distortion 100 watts of oscillator input power in radiophone transmitters: to handle 100 watts of undistorted power output as an audio amplifier: to deliver 1000 watts of useful power output as an oscillator at 3000 kilocycles or below: or to sup- ply 1000 watts of peak power output as a radio-frequency amplifier—these are the operating characteristics which make Radiotron UV-851 such an excellent all- purpose transmitting tube.

For further information write RCA-VicTOR COMPANY, INC. 233 Broadway NEW YORK CITY Sav Yo 1 Saw It in QST — It Ident

fies You

Filament Volts ss & «& ll Filament Amperes oe « Be Amplification Factor . . 20 Modulator Plate Volts (ween Grid Bias Volts . e« »« —80 Plate Current (ma.) o e« & Plate Resistance (ohms) 2300 Max. Plate Dissipation (watts) 600 Osc. Input Watts for each UV-851 (Mod. Factor 0.6) 400 Oscillator and R. F. Power Amplifier Max. Operating Plate Voltage Modulated DC Plate Volts 2000 Non-modulated DC Plate Volts 2500 Max. DC Plate Current (amps.) 1.0 Max. Plate Dissipation (watts) 750 Power Output (watts) 1000 1 and Helps QST 67

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n you turn back pages of time? he 1920 series of QST — you have not — you are Even 1922 and 1923 ing scarce. And copies be- Well, let’s change the f ow m now QST copies of bt will be just as scarce. of OST appreciates its We are daily reminded e many requests we get ies, many of which we +} probably later this year looking for a certain 1930 You had better resolve kee p your copies in a OST Binder fasteners a to mutilate Opens and lies flat position One-fifty each postpaid keep your QSTs always ect them for future use. oking binder, too. OST Park St., Hartford, Conn. Say Y« 1 Saw It in QST GERMAN SECTION By W. Rach, D4ADFP, Sec’y, D.A.S.D, It is our unhappy duty to record the sudden death of Dr. Wilhelm Titius, editor of the German organ “CQ,” and council member of the German I.A.R.U. Section, the D.A.S.D. Dr. and Mrs. Titius met their death in a disastrous motor accident on April 11, 1930. Dr. Titius was one of the oldest amateurs in the country. Through his death German amateurs lose a good friend and a valuable co-worker, whose real amateur spirit was known everywhere, and it will be very difficult to fill the gap caused by his sudden death. In the passing of an esteemed contem- porary, may we point to the monumental work he has achieved, and convey our sincere personal desolation and regrets to the bereaved. and our mourning German friends. Dr. and HMilrs. Wilhelm Citius | On June 7-9, 1930, the fifth annual Cerman amateur convention will take place at Halle a/S. Here is the program: Saturday, June 7th. 8:00 p.m. Official opening at the Hotel Rotes Ross. Sunday, June Sth. 11:00 a.m. Business meeting and lunch. Monday, June 9th. Lectures on various sub- jects. Tuesday, June 10th. Visit to the Institute of Technology, of the high frequencies at Koethen It is hoped that many amateurs from all parts of Germany and Austria take part in the conven- tion, and, of course, all friends from abroad are heartily invited. We should appreciate a_ short note from any of our foreign friends who ar likely to attend the convention. Activity on 3.5 me. has increased somewhat during the period covered by this report, D4AB\ D4GT, and D4GL having been heard by the Silesian stations on this band, while D4ADF a Berlin and D4UAB of Bamberg are carrying out regular tests on ‘‘S0.” 14 me. has been most unsuitable for DX the last few weeks, only a very few South Americans having been heard here on that frequency Nevertheless D4BY succeeded in establishing about thirty contacts with the Aussies and Zedders. DUTCH NOTES By H. Pomes, Ass’t Traffic Mgr. N.VJI.R. The ‘phone business still remains the same, big activity on 40 meters and only a few men on eighty. Several Dutch hams organized ‘phone tests in this latter band, and one after anothet§ dentifies You and Helps QST id ol TT

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- World-Wide Reception with the NEW Norden-Hauck - Short Wave SUPER DX-5 Size: 9x 19x 10 inches. Weight 30 pounds Ideal for Amateur Reception Entirely New Advanced Design New Pentode Tube Sensational Distance Range 20-200 Meters Reliable Performance Adaptable for Long Waves and down to about 10 meters for Experimental Reception A-C and D-C Models NORDEN-HAUCK, Inc. . Engineers 5-7 South Street - ° Philadelphia, Pa., U. S. A. Write, telephone or cable TODAY for Complete Information | Say You Saw It in QST — It Identifies You and Helps QST

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D.C. FOR PURE POWER SUPPLY P. R. 866 Fil. Volts - 2.5 Fil. Amps. - 5 Peak Inverse Volts - 5,000 Peak Plate Amps. - 0.6 Voltage Drop - - - 15 Overall Length 6/2” Overall Diam. 234” Price - - $8.00 er the new regulations all tateurs must use an ade- y filtered D. C. current R. 866 and P. R. 872, both vapor rectifiers, besides a wave form easy to filter, f 1 h a stable source of plate volt- ill load or no load, because bes possess a low and prac- constant voltage drop. The llv long life of the P. R. 866 R. 872 is due to the low oper- temperature of the oxide filament combined with the ly low voltage drop result- |) their mercury content. these Perryman rectifiers, for their rugged strength, ing your station in line new regulations. itt e prices for licensed amateurs PT RIC CO., Isc.. Bergen. N. J. Li f money order EE check $ or P. R. 866 at $8.00. BUGIEID@..ccecensonscsescceenesssensesossensnsnesenanennnenenseans ~otation...... “ou Saw It in QST It Identifies You and Helps QST finds out that it is not so bad after all, for this kind of work. In the 7-me. band circumstances have been pretty good for communication with European, East Asian, and North African stations, but DX stations were seldom heard and were not worked, Usually about midnight all reception is restricted to some local stations. The 14-me. band offered many fine occasions for DX work, especially on April 5th, 6th, and 7th for communication with the U. 8. A. PAODW js crystal-controlled now, and works with his new transmitter almost every station he hears, PAOZK and PAOZF had several fine DX QSO’s, PAOQF had a sked with PK2AJ and worked him several times during two or three hours. On April 7th he worked all continents; he surely keeps a record in putting pins in the map on the wall! Every day Asia and Australia may be heard until 1800 G.C.T.; then African stations become audible, though not so loud as in the preceding period. After sunset American stations are heard, especially the South Americans at about 2300 G.C.T. On 28-me. SUSRS and PAOVN are heard. There are several Dutch hams who ar equipped with crystal-controlled stations. The number of licensed amateurs still increases, and many others are preparing for the exams. If matters go on in this way all will have gotten their official certificate by the end of the year. J. Clarricoats, Hon. Sec. of the R.S.G.B. and B.E.R.U. has communicated to us a suggestion made by Dr. Curt Lamm, D4AFA, of the D.A.S.D., to the effect that wherever possible, contracted forms should be used when giving QRAs to DX stations. These abbreviations are intended to take their place in the already exten- sive ham vocabulary of abbreviations as a group for international use primarily. We are printing the two lists enclosed with the suggestion, one each for Great Britain and Germany. At the same time we request all I.A.R.U. member societies who may be impressed with the usefulness of the idea to make up and forward us a list of their important cities, and a contracted form for each. The following lists will serve as a basis upon which to work, if the scheme is deemed worthy of uni- versal consideration. Great Britain London LDN Manchester MCR Glasgow GLW Birmingham BHM Bristol 3TL Edinborough EBORO Newcastle-on-Tyne NWC Liverpool LVP Dublin DBN Coventry CVY Belfast BLFT Cambridge CAM ermany Berlin BLN Hamburg HMB Amme Dou ble meter, volts, ¢ Transf output ratio Transf output ratio Transf input, ratio Coils, Bec, ¢ viadin Ret, Cc OA, 181 Ret. cy A, 85 Ret. cx MB, 11 Largest ments. UMITI MAN]

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r this been pean, t DX irked, ricted

‘sions d 7th W is ; new 1ears, ISO's, 1 him April eps a wall! heard come eding eard, 2300

and stion the sible, ving ; are OO — Practical Wireless Telegraph by “Elmer E. Bucher” 1.00 Ammeter, un ae ae ane: Sa oe Engineers pocket handbook 75 Double reading 50. Voit- a ‘ “ties rm c , meter, Weston No. 267, 0—75 Rh “Ryo ‘~ ro — byt urd, 500 ol 2 to insia volts, each $6.50 amf al g we Rheostat, vitrohm, variable, Ward Leonard, 6 ohm 15-5 np. bat. ch we tym 3.50 — ” Seudidieats aineaienr Una Emmnnne eal, tac AT LAST — Genuine Western nae vitron BS SLOSS, WHR NSCs, S58. & 1sq Electric Hand Microphone Home vee econ : 1°’ Broadcaster. $3.50 used, $5.00 new. Relays 2 and 5 kw. (110 or 220 volt) % si r contacts 7.50 Relay West. I low voltage, 2 upper and 3 lower platinum point screws, 3 contact arms Extra platinum contact screws or arms Amplifier, W.E. Radiophone, C.W. 926, 3 Stage Heterodyne, Signal Corps, type B.« 104. 1000 to 3000 meters, with detector Air »ympressors, llogg. Model T. 1% ft. per in weight 6 Ibs., 600 R.P.M., 125-lb. Requires \ |! Condensers, Mica, op. volts S!’E* U. S. Army instruction book on tele; 12,500 cap. .004 graphy. Hundreds of pictur and diagra Dubilier, new $17.50 M hon Army Trench, sensiti Dubilier, used 15.00 M vone, Aircraft, Magna-Vox nsit ) 32 volt, comp! wit! eston No. 269 , Wireless spec. New 15.00 ©! “we “4 B, cn “ ~ - a. ghee Fw Portable Hi-speed Universal Ham- ret be » cu t : ? s end - " Generator, airplane, Signal corps, wit! uft, can be used and Grind Attachment $7.50 as motor, 12 volt 33.6 amps. 5000 R.P.M 10.00 Generators, 12 volt, 60 amp. has automatic controls 20.00 West. Elec. Dynamotor, C.W. 927, two D.« 32 It dynamotors in noiseless hangar. t iin parallel gives 160 mils at 350 volts, series gives 80 mils. 700 volts suitable for xmitters and receiver 20.00 West. Elec. swtchbd. control pane! for al r } has switches 0-50-5000 itr ilte system, etc Special 8 OO Ammeters, D.C. portable, new West od 45, 3 acale 0-1.5-15-150 with 3 scale ext 2 it and leads yof1i% a irate 40.00 “ An eter, Weston No. 425 thermo ) -2a td ‘ : _ yn large bakelite base with D.P tage swit 7.50 NEW LOW PRICE Innsformer West. Elec., An ter 50-0-50, Wstghse, B.T. flus! te 75 Dynamotor 32/350 volt, ball bear- ~ co o. 102A, 4 +3 55 t meter, Sangamo, battery charge and d ing, 80 mills. Special $12.50 ratio $3.5 pe MS 0-500 scale, capacity 15a 10.00 Tansformer West. Elec., , Westinghouse, 0-150 surface mt , mn. 5.00 wtput, No. 202A, 5 to 1 tor. Crocker Wheeler Holtzer Cabot. 110 ratio $3.50 A.C... 500 watt. 500 « Ball bearing 50.00 Transformer West Elec., ( plete line 500 cycle motor generators \ to K.W aput, No O1A, 7 to 1 I 1} > . > ransformers, General Electric, 1 to OO, wit utlo $3.50 center tap, 60 cycle, 200 watt 7.50 Transformer, Amertran immersed, 1 K.W ” 220/8000 volt 10.00 Condensers, transmitting, Murdock 01 mfd. 12,000 volt, ideal for plate blocking 2.50 Condenser, Dub r, mica, op ts 1 100 ca 004 10.00 Condenser, Dubilier ica sits 40.000 ca wl 01 0008 or .003 .00 Condenser, Dubilier, mica, op ts 8500 w4 10.00 » Headphones, West. | tric N 194W as C.W. 834 3 . 2200 ohms, D.( slight sed, Na 5.00 ‘lls, Retardation, West Holtzer Cabot, “ Mike Utah t i " tee. Co. 57C, .83 ohm, 2 transmitter. Specia 95 vindings .08 henry $1.00 w 1 Electric Radiophone Tr t it OW 1.50 Ret. coil West. Elec., No Dy tor, aircraft 32/275 volt aft 10.00 SA, 1800 ohm, 12 henry $2.00 Edison stora at miner M8, n 1 Ret. coil West. Elec., No volt, 11 r i, per 1.50 U. S. Army Telegraph Set, key, “4,85 ohm, 1.3 henry. .$1.50 NAVY Dyna s General Electric 24/1500 volt. 233s sounder, D.P.D.T. switch, 2 large Mt. coil West. Elec., No mills. (ext 1 Shaft $3.00 extra 37.50 magnets, in portable carrying case. 4B, ll ohm, 1 henry... $1.50 New spare ar atur G. E. 24/1500 1 ) Less Batteries $6.00 specializing on Army and Navy Surplus. Write us your particular require- quired on C.O.D. orders. NO. C.0.D. ON CANADIAN ORDERS. DUE TO ISSUE CATALOGS. HOUSE, Dept. Q, 105-7 Fulton St., New York City QST It Identifies } 1 Helps QS7 71

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Learn Radio Telegraphy ry contains the essential information 3 t who wishes to learn radio telegraphy. lly written for home study work. essential facts concerning radio t the questions and answers which nt examinations are all covered Library of Practical Radio Telegraphy ges, 5% x 8, 314 illustrations vol Practical Ra t 1 ter n a lio to VOLL* Radio Op- erat ons and Answ 1! Edition . ; r t operation and considers electrical, vrovements. Questions and answers on lio operation are most carefully worked ng for his operator's license these books — No money down, e them for 10 days free. Then, after you rese books aren't worth five dollars to ave only to remit $1.00 in 10 days and ! If they are not satisfactory you hav nd mail this coupon — NOW!

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( f standard items you want, at ERICAN SALES CO. 19-2 n St. New York City

42 Say You Saw It in QST It

Brandenburg (Havel) . .BRDB SEE OO BRSL Bremen.... ' .. 2. DRM Chemnitz. . .. CHNZ Dortmund ae DTMD ee DSDN Duesseldorf aie DSSD Elberfield. . . . ELBF Ierfurt. . . EFT Frankfort (Main FFM Frankfort (Oder FFO Halle (Saale) HAL Hannover HNVR Karlsruhe (Baden KLRH Kassel KSSL Koln KLN Koenigsberg (Preussen KBG Leipzig .... LZG Leignitz. . LGTZ Magdeburg MGB Muenchen : MCHN Nuernberg . . NBG Stettin STN Stuttgart STGT Let's have lists from all the other countries to complete the table now WAC The following were issued WAC certificates during the year 1929: Ladislav Vydra, C2YD; Gilmer Kirkelie, W6BZD; J. H. Robinson, W5AKN-W5BG; R. G. M. Anthony, OA5CM; Charles A. Topping, SCIAH; H. D. Huston, W9FXR; Miguel Moya, EAR1; LeRoy Moffett, Jr., W5ZAV; F. G. Calvert, FOA3C; Roger Pie- ton, ef8SAXQ; Maurice Hupel, ef8SAAP; Henry Clive St. John, VK2RX; Geo. G. C. Bennett, G5BZ; Charles P. Tennant, FOA40; Jack Kazuo Shibata, KuALM; C. J. Mumford, CTIBL; Francesco de Albuquerque (Mangualdo), CT1CF; Maxwell Kelch, W6DZD; T. A. St. Johnston, G6UT; J. J. Frederikse, enOFP; Leif Salicath, LAIG; Robert E. Carter, W6CIH; G. A. Baker, W6CHY; Masayuki Hisamoto, K6CLJ; PF. Salles Botelho, SB2BG; Leo A. Paul, OA3LP; Eugene Stadden, W7IF; A. O. L. Strickers, NRDM; Alex Melver, ZT5E; H. S. Jones, W6AX; G. Emrys Jones, G6XB; H. Littman, D4FN-D4XN; Kendall Curtis, WI1AKM; Eric Neilsen, Jr.. SC7AA; D. C. Sayer, W2GP; D. E. Klumb, W7AFO; W. H. Treston, W3JM; R. A. Hill, ZS1A; Bruce Hoag, WSAXA; W. P Brown, W3PF; H. V. Wilkins, GOWN; Frank Miller, VEIBR; Oscar Egenes, ZT5R; Christoph Schmelzer, D4AAR; K. Beintema, PB7; ) Edwards, G6XJ; V. Chennel, VK5JH; G. §. Samways, G6OH; E. T. Warner, GBVJ; H. L Garfath, G2BM: Geo. M. Rose, Jr., W4JS; Clayton 8S. Waldradth, W9DLY; J. C. Stannow, OZ7Y; Leslie Carr, W9AOK: W. G. Chase, WIBKR; Keith Howard: Roy Clarke, ZL2AW; Leo Charette, WIA BD: George S. Yerbury, W2AI; Harry E. Smith, G6UH; John Koski, W6DBO; J. C. L. Edwards, G5UQ; John A Roehm, W3ADM; L. A. Moxon, G6XN; Carl Wiedenhammer, WI1ZL: J. Burleigh Scott, Identifies You and Helps QST

“T

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“les to icates 2YD; inson, SCM; iston, offett, r Pie- lenry nnett, (azuo ‘1BL; “1CF; iston, icath, Saker, : ee 3LP; okers, lones, ‘man, Eric 2GP; 33M; 7.8 ‘rank stoph 1. C : 5. 1. L "458; now, hase, AW; pury, ‘oski, nA Carl cott, N. long ago, a Ham wrote us—“‘I've been using CARDWELL S since Hector was a pup’’—Amateur radio presumably being the pup referred to. Much has happened since Amateur radio was in its infancy, but CARDWELL condensers still retain the confidence not only of discriminating Amateurs but of Professionals — Engineers and Designers backed by unlimited resources which permit of exhaustive tests to determine compara- tive condenser worth. You, too, may prevent or eliminate condenset trouble by using the simple, sturdy CARDWELL for transmitters or receivers. If you have difficulty in obtaining CARDWELL condensers locally, we shall be glad to serve you direct. Literature may be had for the asking. CARDWELL CONDENSERS 456 THE ALLEN D. CARDWELL MFG. CORP. condenser having the stator plate readily adjustable to permit SI Prospect Street, Brooklyn, N. Fe changes in maximum capacity ranging from 50 to 10 mmfds, with a constant minimum of 7 mmfds. Since broadcasting began Hector Was a Pup” ‘THE STANDARD OF COMPARISON” Say You Saw It in QST — It Identifies nd Helps QST 73

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QOuartz Plates for the ama- teur and experimental bands. These STANDARD plates are ground with exactly the same care—the same precision—used in preparing plates for broad- cast and commercial stations. Fully cuaranteed. Prices Fre ney stated to within one- ten! ff one percent — maximum po 15-2000 KC — $12.50 500-4000 KC — 16.50 7000-7300 KC — 35.00 Quartz plate-holders. Temperature cor equipment. Full line of equ rent to fit the amateur’s requirements — and pocketbook. Sen or descriptive literature. Radio Laboratories 602 hter Bldg. Dallas, Texas EASTERN AMATEUR L HEADQUARTERS [= A Special Model “BB” Microphone Net weight, 1 Ib. g — Packed weight, ¥ , — 1% Ibs r voi built especially fo \ nd for amateur broadcaster range ts trom 50 to 3000 ind operate ym 6 volts and 8 Wimar microphone in t oo ) rat 1. Each nit irefully tested nt of hook-up included rch unit. Diameter, 3 | thickness, 144 inches. 1 eur and Service Men | ! Amateur Catalog M |. SPORTING GOODS CoO. — 2 Market St., Phila., Pa. ——ees | STANDARD EI7C; G. E. Brown, ZLAAE; Charles W. Randall, VS3AB; R. Herdin, W2RS; Gordon Fletcher, W4AEF; E. C. Hagar, W1AZE; L. Granninij, W6WF; A. C. Simons, G5BD; W6ANN, W. A. Adams, Jr.; A. Creixell, EAR65; W. S. Plyler, W4ABV; T. Woodcock, G6OO; P. M. Huybreg. son, PAOQF; W. H. Heathcote, ZT6X; H. A. Maxwell Whyte, GGWY; M. M. Hill, W5EB; G. B. Ragless, VK5GR; W.S. Davison, GI5WD; Alois Wierauch, OK1 RV; H. R. Drinker, W7MO; R. Toussaint, ON4US; C. 8S. Hunt, G6NT; Hector Soula, LUSEN; Th. Wilmink, PB7W; Jose de Penha-Gracia, CTIBY; R. A. Bartlett, G6RB; C. H. Hill, ZS4M; E. H. Turner, VE2CA; G. W. Hamilton, W6AWZ; B. Pothast, PAODW; Z. 8. Bresinski, SP3KX; C. R. Plant, XW7EFF; J. Secorgie Owner, G6XQ; Dante Bolafh, I1TU; Joseph Betz, W2BJG; Maurice Meunier, ON4CK. Calls Heard (Continued from page 59) whaxm w6ayq w6bdx w6bgl w6bh w6bjb w6bjg whboc whbpo w6brh w6btl w6buk w6bvy w6by w6bzy wéedj w6cege wicaw whcim w6cto w6cul whcyr whcyx w6czq whezz w6der w6dpj wédrx w6dto w6dyj w6dyl wéheaq whebz whece whedd wheel whejb welt wheop wiequ w6esa whetn wheuh wiew w6kn wima whse whsf w7aab wv7aac w7aah w7aax wZaic w7aii w7ait w7aj w7ajw w7amx w7a0o wibe wicr w7fj w7fl w7gk w7it w7mv w7pp w7qb wirt w7wl w7acy w7mb w7afx wZ7ajh wice w7fu wZ7ahw w7id w7agq w7io w7jc w7my wiacd w7a0q wiaiz w7af w7ua w7ab w7gp wSbef wSbe}) wSbey wScfw wScjo wSdud wSlit wSuf wScum wStm wSre wSbws wSdpo wSdxn wScau wSdmn wSaav wSbyce wSbpf wSbex wSddk wScb wads w9akz w9aqs w9bez w9vk wOvxz wScag wIce wiIcph wpeve w9cy w9dgz wOdih w9dsk wOdtj w9ehf wOflg wfxj w9fyp w9nk w9lz wrk Heard at Anchor in Guantanamo Bay w6am w6djw w6eup w6asm whidxv w6dyn w6bck wé6axf w6dtd w6csq whewf w6ato w6ibpm wéh6eif whebg whaqo w6ael w6fp w6car whaeu w6czt w6bip whig w6abg whdui w6bzi w6ln w6by w6yi wheqb w6bqq w6brd wécjg whebs whepx w6btu whcim whesz whecq whaxa w6dwt wédoj whbck w6ede w6as} wheib w6bkx w6wf w6nf wéhadb whdzy whaiw w6uce whcoa whcii w6dwi whadw wédep wichl w6cbp w6amw w6cuh whaga wikbp wéawy w6bdd w6ibxw w6boq w9egu wObpb wchx w9czl w9bhw weve wSei0 wOdis w9azy wOgiy wofew wObay w9bbl whe w9eci wOamv w9bw wcou wae wSbto wObkq wye w9ayw e9arn w9aip wOnb wScd wSfgq w9au w9bye warm w9cfa w9bxu w9bez helfg zitao k6ceu k6bxw zl2iw W9GHI, Karlton Marquardt, Baldwin, Kans. 14,000-ke. band oatj pylaw pylah pylem py2bf py2ay he J ce3ce fShr cxlfb lulba lu2fi lu2at lu2dj lu2aa lu2ca lu3fa lu3dh lu4da lu6fe luSdy lu®ce cm2sh em5cx on4fp ve5aw velbr ctlby ct6d ctlaa ctibx helle exlfe g2bm g5lw g5by g2oa g5kt x9a nj2pa vk4ak vk5hk wsg rsq j5h 2im ce2ab 14,000-ke. "phone wlcei wSdid wSrd w3cp wSdno ve3« VS7A P. 4 VW. Rahim, We llawatte ’ Colombo, Ceylor wheop whclz wicuh w6bax wef wo lqu w6fk w6dyv wOdef vk2ed vk2es vk2ek vk2he vk2hu vk2ja vk2je vk2jj vk2il vk2jp vk2jy vk2jz vk2kj vk2ns vk20w vk2rx vk2wu vk3bq vk3bw vk3ce vk3cx vk3de vk3dx vk3go vk3jo vk3jr vk3kh vk3lp vk30r vk3pa vk3pm vk3rh_ vk3r) vk3rp vk3rx vk3wo vk3wx vk3x0 vk4aw vk4bb vk4bh vk5by vk5em vk5dx vk5er vk5hge vk5it vk5ja vk5mb ' vk5rw vk5wr vk6ag vk6fl vk6ft vk6wr vk6he vk6lg vkimu Say You Saw It in QST — It Identifies You and Helps QST ae Ac etl ork i ping ho | al in Itn $8 11 ng ci rin ~ ing bly 2 Eve wel irins am. ¢ in: RE For t ws re idress

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idall, cher, \nini, VA lyler, breg- lL. -& SEB; WD; MO; iNT; TW; tlett, 2C A; DW; iFF; TU; tCK. wiboe w6edj whe2zq wheaq vhequ v7aab 7amx w7qb 7ahw w7af ySdud wSeau wads v9eph witx) whaxf vhaqo whdui whebs w ido] yOadb yidep ‘Obdd weve VOghg wiye Yvarm mo, wv Odef vk2jl k2wu VK5JO VKOr) k4b r } kSmb

PATTERN Nowe

ore CTC VRREN?

50 MILLIAMPERES

Panel Instruments for Radio Amateurs Accurate electrical measuring instruments

ANewVoltohmmeter for Service Men ethe keys to achievement in amateur radio The Jewell Pattern 574 is designed ork, Amateur operators of today who are especially for making rapid checks of oing the worth while things are the amateurs yo tage resistance and continuity in tho have acquired the habit of using electri- -adio service work. The 3%-inch Jewell al instruments to secure exact working data. meter has scales of 0-100,000 ohms and It may be true that acertain amount ofsuc- 9-300 volts. Push button switches de- sin amateur transmitting andexperiment- crease the ohmmeter range to 1-10 its can be accomplished with limited meas- value and the voltmeter range to 1-10 mg apparatus, but the same amount of #5 value and also double its range. fort directed through the use of exact meas- The panel carries complete operatin ting instruments will accomplish immeasur- jnstructions. A 4)4-volt battery Atte bly more. beneath the panel makes resistance Every amateur operator should have a new ewell radio bulletin which gives certain iring diagrams and describes the Jewell line amateur instruments as well as radio serv- tinstruments. Mail coupon for your copy. checking and continuity tests conven- ient. Test leads with plugs that fit into the jacks further increase the convenience of using this instrument. The voltmeter has a resistance of 1,000 ohms per volt. Mail the coupon for literature describ- REE to Amateur Operators ing the Jewell Pattern 574 Voltohm- for the benefit of our friends in the amateur oper- ng field, we have made a time and date chart that ows Comparative time throughout the world. To ure one of them free merely mail us your name, idress and call number.

30 YEARS MAKING GOOD INSTRUMENTS

“SeWELL ladio Instruments Say You Saw It in QS7 It Identities \

meter and copy of the new Jewell radio bulletin.

“ : : ment Co- iM Electrical Ine ee ago | 1ei2- ~ Walnut St., Chi bute | -—" ant your new

. iw for rec . ents s of Co ribing jnetrume Please letin des and service WOF™* | , eur amat 4

amate ant mail it — ieee

Address . } ber ...-<---~~ Catt Num 1 aso

nd Helps QST 75

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: vk7ch vk7lj zllar zllaa zllao azllfr zllfw zllfu zldgh ee zl2bp zl2be zllba zl3as zl3cem zltbg g2ma g2ao g2gf a Oo R E B ARGAINS ee g5pj g6bd g6nf g2dz g2kf ce5aa ce2ab ce3bf oa4j oatg ' Pgs : eee lu2aa lu6fe lu3fa lu4bi xu2uu x9a pylax pylah pylay 1 a SS ar ae vsiab vs6ae vsbaf vsbag vs6ah vu2ek vu2ac pklci pklex ; : ae pkljr pk3bm pk4bo pk4az pk4rk pk4pa file kaljr ctlag = yong Bing BY. - etlbx pmz zslp zuld z2tlt zs2n zs2s zs2z z2t2c 2t2e zsSy Filter ‘Condensers: (All ratings zt5e 2t5l 2t5q 2t5x zu5b 2t5r zt6x zufia zufe zutin zufs 1000 \ ots ee > ou. zu6w zu6x zs5w zt5v zs4a zs4m zste zstip d. — $5.90. RCA or : ae Fr Masel ages. 1. ye termi Marshall Goldberg, 6231 South Park Ave., Chicago, “2 Mfd., 450 Volt — Tl. 2 Mfd., 850 Volt DC : Of highest quality wlaak wlaal wlabz wlach wlack wlaep wlaew wlafb of these units may be wlafu wlair wlaje wlalb wlame wlanz wlaof wlagt and capacity. 70c each | elve for $6.45. Twenty wlarg wlars wlavf wlbal wlbea wlbfz wlbit wlbj wlbkf wlbkr wlbux wlbw wlby wlbyv wiedq wicel wef rRANS “| i) filled go neayys = wiche wlcoz wicpi wlerw wida widp wlfk wliew wilif nt a, windings. 125 Watt wljr wimk wlmo wlms winn wino wlon wipd wibpi for 21 me ora ee rage wipm wlpy wirp wiry wlwv — wixab wlxe wlyb will give . . , a q ed SPECI TALI Two for $3.95 wlzz w2abu w2acd w2ace w2a w2aeh w2aeu w2afj formers: Type T-3202. 250 Watts, w2afr w2agi w2ahg w2ahi w2ail w2 rajt w2alz w2apd w2api i¢ $5.75. T-3321. 175 Watts > . > > - > 9 9 Ci $4.50. T-2430-A. 150 Watts w2apy w2aqgh w2aql w2aqt w2arb w2ate w2auq w2aur w2auu w2avz w2baa w2bac w2bbt w2bey w2bhv w2bie .MERS. Well-constructed. Metal w2biv w2bjm w2bkv w2bkz w2blx w2bmk w2bnx w2boa > 80. 7% Center-tapped — $3.75 . . . le r end 7% CT — $4.95. 10 er ~a w2bpn w2bu w2bve w2bwk w2eq w2 ead w2evj nmounted 7 volt, 50 watt w2exl w2ez w2czr w2di w2dk a w2fn w2fp w2gt w2hr ; rewo a , ». Can - rew nd | Sag any voltage am ix w2jd w2kj w2kx w2lx w2md w2se w2up w2wf w2ws w2xam 10. Two for $1.70 $1 15. Output transformers — w2xd w2xv w3aac w3adi w3adm w ‘Bael w3afj w3afx w3ahp oe w3aih w3ajh w3an w3asg w3atz w3avd w3avf w3awb 5 Milliampere. A well-made ’ > : ° " = : - r-gap construction w3ax w3bd w3bhx w3bme w3bnf w3bnu w3bq w3edu 5 Amp “A 6 t w3cee w3cef w3fx w3ef w3gi w3he w3ht w3hy w3jm w3kt ‘= mp filter choke, + ; w3o0h w3pf w3qw w3ut w3wm wéaao w4acz w4aef wdaeo 1 case containing w4afk w4agz w4aha w4ahl w4ahr w4akq w4aq wéar w4es io ah 6 w4el w4fx w4hh w4hs w4ib wékv w4ky w4lx w4nl w4qb rt > ie) = . e w4sn w4to wawe w4wm w5adv w5aeq w5afi w5aqy w5ars FREE hes Dey Repie e w5asq w5atf w5awq w5awz w5ayl w5ayy w5bdx wfj ‘ 250 — a - - . . . . : somet tx 222 $3.25 w5im w5om wSpe w5sw w5tz w5uf w5za w6aaz wéhac ry xe tested before w6ags w6akw w6ap w6arv w6awq w6bqk w6chv wéecui : tip w6evn w6eww whicyp w6cza w6hdbd w6dcq w6deq w6dns = whdqv w6idsg w6dtz widvd widz w6ea w6hm w6lx wing in + see — F 230 . FUL SILVER DIP FINISH wSejb wS w8esa wSewu wSddl wSku wSpk w8rd w9bwy nuime ALCOA Stock

4 14x 6x 6, $3.95 wOdzt wOfld w9 rin 24 hours INUM COIL ba = my >mamear sis x6 19 V ESET. Ontari 14.000 di4dba {Skf f8wb g2a0 g4ml g5by k4akv nj2pa nkf velap velar ve4dk vediv v h ¥ I » veSbl ¥ »Sae wiaew wdafe w4ahl w4ahs w w4lp w4ne w4nl wiv) w4we w5abi v bf wSbem w5bl w5rg i ver INUM TUBE SHIELDS w4up w6hac whaov w6bws w6dzo whidw widyb w6eeb w6eof a ( r w6dwp w7akp w7fh w7ga w7nr w7p s L. variodensers s. 84x il ae oe a d4uj £8 ' 7000-1 rsby g5bz gérb } ude — te . . . a : AR R ° 89X Cortlandt Street g6yq kdv5 kfrS5 vedas velbr v Vie vkerb vkong nN adio Man, Inc. New York City w4ac w4acc idn w4aef w4aej v | w4ahq wéaiv w4aki

dentifies Y t ‘Ips Wi

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“ | a See Those at the forefront of w6nz winr re3be ve “a American radio had the al / | foresight tostandardizeon Sajh os tees the foremost resistances. There is a DURHAM Resistance for every purpose. Write for data sheets and prices of ratings in which you are fa ¢ interested. w2g) w3rb wSbxy 9bwy © Pee a a - . nae tan & * ge rund, te gone CG é ° She & y a GN . “, ‘ om ot . Te p entg g “4 4h, - a tp rs nis ft RESISTORS & POWEROHMS INTERNATIONAL RESISTANCE CO. 2006 Chestnut Street, Philadelphia, Pa, ee | Say You Saw It in QST — It Identifies You and Helps QST

Page 76

OOO ITI II yyy yyy he NEW Easy-Working GENUINE MARTIN VIBROPLEX No.6 Marke: Vibroplex: Bug: Lightning Bug COLORS: Blue —Green — Red Vibroplex Black or Colored, $17 Nickel- Plated, $19 in Radfo Bug — Extra large, Specially tact Points fo ect use without re- : i for direct witho s $25 1 Vibroplex accepted as part payment Money Order or Registered Mall VIBROPLEX COMPANY, Inc. 5 Broadway, New York City Address: **VIBROPLEX"™ New York ~ Build Your Own lti-Range Volt-ammeter rN A 0-100 MA 2 lyr et ~ > L, Poa ra > MA ht et 85 Oo 1-10 - 100 « a J = eres wire-wound Resistors and Shunts to build an accurate Multi-Range in the above diagram resistors of any value from t They are carefully designed uracy of 1 per cent and a constant perma I se is highly recommended h Voltage Regulators, Tel lelevision Amplifiers, Grid and Super AKRA- OHM Mai wee wouwo range from $1.25 for 100 ohms | to $4.00 for 500,000 ohms cr I t T N T for incre sing the range of ~ } milliammeters, $3.00 each. sler's or jobber's name and we will send 100 -€ containing the original voltage for the use of Super Akra-Ohm Re- ructing Multi-Range Voitmeters. he Sd Nialleross Mig. Company SR Rt wOUNO aceutate | ELECTRICAL SPECIALTIES ‘ RES iSTORS H ollingdale, Pa. | = Say You Saw It in QST — It Identifies ¥ w4akq w4aq w4bl w4br wéef w4dx wei wife wigd wily w4nl w4pk w4qp w4sh w4tz w4ut w4va w4vl w4vm wacy w5adp w5adv w5agp w5aef w5aha w5ain w5aly wag w5aqe w5asm w5aue w5awq w5axo w5aye w5bbe w5bb w5bbo w5bez w5bj w5ec w5ef w5er w5fq w5iz whja whje w5mx w5oc wiqw w5ty w5yw w6am w6dsg w6dyj w6dyl w6ec whekf wheop w6ke w6kg w7ac w7a00o wirz wity xce61 xc51 zllax zi4am 3500-kilocycle band velbi velbn w4agz w4hk w4ky w4ll warm w5ase w5bad w5bag w5ilr wima w5oe w5om w5pp w5qa w5rg wé6dop w6dyh w6dnz w6rj w7ab w7hv w7vn 3500-kilocycle phones veldq ve3dp ve3ey wlaby wilbeq wicz w2agy wait w2aow w2bee w2bse w2st w3abn w3aeq w3bfz w3bij w3ced w3ckj w3cv w3mb w5kx w6ean wS8abi wSayp wSae wSafq wSakp wSaux wSbhf wSccz wScjx wScmw wSeay wSevh wSdpd wSdvw wS8gl wSux w9axz w9bem wb w9cby w9dds w9dzt w9fzl X3A, G. W. Lord, Tolteca, Hgo. Mexico 14,000-ke. band wlbw wlbux wirk wlae wlaze winx wlbs w2vd w2mb w2va w2tt w3jn wijm w4kd w4de w4ly w4jr wtaks w4yj wie. widv w5ql w5bee w5aqe w5oy w7ai wSoq w&en wSdno wSauz wSdep w&fd wSrd wSdgp wSdpo wSbet wSdae wScaq wScew wSauu wSai wSdjv wS8cod wSapr wodjf wOdf w9du wef w9be w9ji w9eag w9bp weed wels w9ads w9bb wScps w9frq w9bmu w9lm wfr wakt oat2 oa4j ce2ab vk2rx he2jm zllap zllao 3500-ke. band ('phone) w5kx w6ep w6abf OKPR19, Alois Weirauch, Mestec Kralove, Czechoslovakia 14,000-ke. band ve2he vk2ns wlae wlbil wlbux wilcaw wlph w2aey w2auw w2euq w2ho w2rr w2qn w2vd w3ajh w3jn w3mz wie wSafm wSapb wSbf wSbti wSbjv wScaq wSdid wS8djp wShx 7000-ke. band wlair wlajm wlajq wlbet wlbjo wlgw wlvp w2ali w2amh w2awu w2bia w2bjo w2boz w2btz w2uc w3aho w3cee wild wiaak wtaeq wiake wial witjb w4pz w4ux w9ghw W9BWEK, W. dD. Marshall, S06 Galena Blvd, Aurora, Ill. 7000- and 14,000-ke. bands whaae whaaz w6abp w6ac w6acl w6acp w6adq whadw whafe whafi w6ags w6agv w6ahp w6aj w6ajp whajt whak whiake whakd whakf wiakw wialw w6am w6ame wéamw¥ whan) whaoe wfapd whaq]) wiasl w6ass w6ata wéatj whatm whato whatr whatu wiauk whaum wé6aut whawd wiawg wiawp w6awq whawz whaxf whaxw w6ayg way) whazl wiazy w6bam w6bax w6bba w6bbo wé6bcj wébek w6bet w6bfb w6bfe w6bfp w6bgf w6bhr wé6bhy w6bu w6bjf wiblx w6bly w6bne wibpe w6bpm w6bq) w6bak wibap w6brv w6bsj w6bsn w6btl w6bto w6btx wé6bub wibux w6bvx w6bxr w6bxv wiby w6byb w6byo wébed wibzg w6bzr w6bzy whcad whcar wicaz w6erz w6cs] whe whete whcto whetp wheuc wher uh whcum wé6cus whcwF w6exw whecvb whcve whcvi wheeze whezn whczz whdak whidbt wider wide] wideu whidey whde whdep wéhals widgn w6deq whdgx w6dil whidiz w6djw w6dkv wédla widmk wtdns w6dog w6doq wtdoz w6dpj whidpa wédq widqv whdrb w6dre w6dss whdte w6dtu wédtz wédu whdwh w6dvb w6dyvk w6dym w6dyn w6dvv whdyvz w6da widzm whdzq widzx wheab wheac wheak wheap wheal wieav whebe whebx whedd wheca whecn whedo wheem wheep whefe whecgh wheck whiecv whecx whehi whelp whehu whehw wé6eilb wheif wheip wheic whejh wéeke whiekw wéhele whely whemd wheob wheop wheoz whepd wiepi whepx whepz wheqf wheq) wheqn whequ when whesa whetg whet] whetn whetr whets wheug wéheul wheup wheva whew whew! while whit whet wh i whl w6jn wike wimx winx whp) wodqyv wthse whs) whsu whue whue wivz w6wb w6xbb whyvl whve whvx wéhzzi w7aat wv7aat w7aax w7aay wvaaz wivabq wiac wiaed wag w7adb w7aeq w7aew w7aff w7afx wiagb waco w7agd w7aho w7ahw wZ7ahx wZ7ait w7ajh w7akm wivakz wial¥ w7alw w7amo w7amx w7anj w7anz w7a0o wZaob w7a0d yuu and Helps QS7 rc (i PLE,

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w5bbf & wije w6dyi t wity w5bad w6don wait w3bij > wSaei w8csu w9bfb ico w2mb cs wy 1 wSen wSbet whapr wged r wakt love, w2auu iz wie wSdip w aml ee wild Blvd, whadw jt woak wham 1 what] whawd gy whayl whbek w6bu w6bak w6bub » whbed whcsq whoeww whdak » whals whadll whag whdu » whda » wheal » wheem wtelp wheke whepa 1 wher wéieul wi 1 whue waar w7acy wad w7al¥ b w7aod Leeds Listening MONITOR For checking your note, its stability and whether D.C. or not. THE ONLY SURE CHECK. Gives you an accurate idea as to what your signal sounds like to _ the other fellow. The Leeds Monitor is en- cased in an aluminum fy shield, 5” x 6” x overall Completely shielded, with bat teries self contained Supplied with A. & B. batteries, but without 1-UX. 199 tube $15.00 Special Make your own transmitting and re- ceiving coils. Copper tubing transmit- ting inductance. Size of tubing Inside Dia. 3/16” 1/4” 5/16” 21/8’ 9c 10c 12c* 23/8” 9c 10c 15c* 31/8’ 10c 12¢ 17c* Prices per turn Thordarson B-Eliminator Transformer $1.65 —aa......., eae Leeds 50 watt socket specially priced. See previous issues of QOS T for details. NEW New York’s for Transmitting Apparatus When in Town Visit Our Store Le Ihe Hore of RADIOW_— 45 VESEY STREET YORK Headquarters ACME EVERYTHING JEWELL BRADLEY THORDARSON Leeds Microphone STANDS Beautiful oxidized copper finish. Very sturdy struction Artisti- cally ef- fective appearance con- designed, Desk Type, Price. . $4.75 Floor Type, Adjustable to / feet Price _, $9.75 IN PYREX FLERON GLOW LAMPS NEON Super Sensitive IT ECT TAT . For wave meter and other ELEC rRAD NA I IONAL uses: candelabra base. 3 LYNCH SIGNAL watt, %4 inch diameter. FLECHTHEIM 134 inch long over all. NATIONAL RECTOBULB Special . +++ -% GENERAL RADIO Porcelain base socket for above CARDWELL tanp 008 IN STOCK Aluminum Shield cans and panels of every description to order. ACM E For Transmission Again we have accomplished the unusual. We are now the only distributors of ACME products. V giving complete line and latest special Vrite for Bulletin 110 prices. DUBILIER ricrex 4 MFD. D.C. Wo The se and TYPE PL 571 List Price $7.2 SPECIAL Filter Condensers for use in filter circ all high Voltage vices and Power Packs. VOLTAGE CONDENSER rking Voltage 600 V are designed uits in Transmitters, Socket power de- SHORT WAVE X-MITTER 734 watt Hartley type Transmitter. Will operate with a 201-A tube, with 90 volts on the plate, up to a UX-210, with 30 watts in- put; has plug in transmitting coils. List price — kit $55. Completely con- structed $70. Special Offer, completely constructed $57 .50 Spe ial LEEDS ke id in b wis m de of Pyrex Two cups size 3} dia 2%” high; supplied complete th 18” brass rod and h rdware. Price $2. 25 omplete Larger size cups 6” dia. x 4%" high; complete set t1 ips, hardware and 24” brass rod Price complet 4.25 SPECIAL $6-25 THORDARSON DOUBLE CONTAINS TWO 18 HENRY 250 MILL CHOKES Heavy duty, rugged double Filter Re wctor for Filter Circuits in Tre ans- litters, Power Amplifiers, “B” iatantens and various other pur- poses @ Each Choke has a 2000 Volt insulation and the D.C. resistance of each Choke is 108.5 ohms. @ When connected is cosine this Phar fe. actor has a capacity of 36 henries at 250 mills, and when connected in parallel 18 henries with 500 mills carrying capacity. FILTER CHOKES MODEL List Price $19.50 T-2458 LEEDS RADIO LABORATORIES Precision Custom Built Short Wave Receivers and Transmitters inder the s Ham" pervisi Broad This department material for the —_— asting station n of the or laborat Short-Wave Spe ry. Write list Jerome Gross. We Jerry Gross for advice on lesign, construct and advise on any any of your problems. ] PLEASE PRINT YOUR NAME AND ADDRESS PLAINLY TO AVOID DELAY WRITE FOR SPECIAL PRICE LIST MAIL ORDERS FILLED SAME DAY 10% Cash Must Accompany All C. 0. D. Orders Say You Saw It in QST — It Identifies You and Helps QST — ‘

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NEW CATALOG RADIO ENGINEERING LABS. \ll the latest dope on ..C. RECEIVERS BEGINNERS’ KITS ling new booklet No. 50 on Vultistage Transmitters for Phone and C.W. res of up-to-the-minute mailed immediately PRICE 50c CLO INC. 100 WILBUR AVENUE LONG ISLAND CITY, N. Y. Z A, Mi, Ml, Me, A, Ml, A, A, Ml, Ml, ln, A, A, Mn, Aes, ll ~Ww nd C) — } \NKRUPT \DIO STOCKS Y GUARANTEED irantee, No. 210, placem $2.35 281, 5: No. 280, 95c; $1.25; No. 227, 75c; No. 226, mitter i " for p or code $14.75 “ ylete with 5 coils, 14 to $6.4 son yt transm r on desk $2.75 ts, will operate up to 10 tube guaranteed $6.75 r Condenser Blocks, 12 Mfd., 1900 2.4.1 and 1 mfd $4.75 aser Packs, 2000 volt A. C. test $7.90 $3.80 1, 160 mi 1500 vt $4.95 $3.75 ent Transformers for 226, 227 and h $4.00 Transformers, sh led, Sec. 600 \ »? f %% tub ind $5.00 r Packs, completely assembled ,$8.75 hlament tor » to 9-tube set Make your battery set all around this pack 95c extra $1.00 ansformers, 1 tol 5s. HOODWIN Co. oln Ave., Dept. G-8, Chicago, Ill. STOCKS IN BANKRUPT RADIO Say Y yu Saw It vyvvvvvvvvvvvvvvyv wivatl w7bd w7be w7dp w7el w7ek w7fa w7fh w7fi w7A wifx w7gj w7hx wi7if w7iq w7jc w7jt w7ka w7ko wij wilz w7mo wi7nh wivnr W7pg w7pr w7pu w7qb w7qd wiqr w7qay wri wirp wisg w7sy witd w7tx wity w7ui w7un w7vk wivy wiweg wiwl wiwe wna w7nm winv w7ny wi7zzb ce2ab ce3ac ce3bf ce3da ceSaa ce7aa cm2ac em2jm em2sh em2wa cm2xa cm2yb cm3dg cmicx emdfe embry emSle emSuf cmSyb ctlaa ctlbx ctlew exlaf cxlfb frearj g5by g5ml g5ms helfg hellg he2je he2jm kfr6 kfzt k4aan k4akv k4dk k4tkd k6alm k6boe k6dd kéetf k6ewb kéw, lulba lu2dj lu2ca lu2do lu2fi lu3de lu3dh lu3fa lu3fk ludhe lu4bi lu4dq luS5ac lu9be lu9dt lu6fe nj2pa nnecab nnleab nnise nninic nn7e oat) oato oadr pylaa pylah pylaw pylca pylcl pylem pylia py2ab py2ad py2ak py2ay py2az py2ba py2bf py2bg py2i¢ py2ik py2in py2qb py2qh ti2ea ti2rs ti2wd velas velbr velce velco veldg veldr ve2aa ve2ac ve2ai ve2ay ve2bd ve2bh ve2ca vetaf vetai vetaj vetat vetbe vetbe vetbl veibm vetbq vetbu vetbx vetck vetcp veddj vetec vetfd vetfk vetfx vetgd vetgf vetgu vetgw vetha vethm vethr vethu vetic vetig vetjs vetkl vetvw ve5ac ve5al ve5ao vejaw ve5cp vk2hu vk2je vk2nb vk2ns vk20w vk3es vk3hk vk3hl vk3jk vk3jy vk3ml vk3pp vk3pr vk3tm vk3wo vk4hg vk5hg vk5it vk5o0s vk5wr vk6wi vk7ch vk7dx voSae voSan voSaw voSme xing x2x x9a x9d zllbb zl2be zl2ac zstm a2tlr xoz7aw xoz7xu xwlm qqla hi2 dn3 wfa xda oatq Your Broadcast Receiver as a Short- Wave Superhet (Continued from page 14 that the fault was with the individual tubes. If the above figures are typical, probably four out of five Type ‘27 tubes will be satisfactory, al- though if a number of tubes are available, it is well to select the best of the lot and use it in the converter, because a tube which is hummy on short-waves will usually be suitable for use in the broadcast receiver itself. In conclusion, may that most difficulties can be overcome by the appli- cation of a little common sense in hunting for their cause. Once the rough spots, if any are encoun- tered, are ironed out, the results should be more than satisfactory. we say we believe The Annual Meeting of the A.R.R.L. Board (Continued from pa that arrangement whereunder the Secretary of Commerce authorizes the operation of an ama- teur station by the holder until he can be person- ally examined but for not to exceed one year. It seems that many extraordinary are invented by the holders to escape appearing for examination, because they know they are not qualified. With due consideration for crippled operators unable to travel and others who may have excellent excuse for not appearing, the Board voted to request the Department of Com- merce to enforce the regulations on the temporary certificate, to end the abuse now existing. The thanks of the League were voted to sta- tions WIAXV and W9XL for their very valuable services as standard-frequency stations in the transmissions sponsored by the League. The board ordered spread upon its records a state- “dodges” in QST — It Identifies You and Helps QST oa oe —=)i ‘ie 6

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lew y— Te! eal ~ THE CROSLEY RADIO CORPORATION Powel Crosley, , pres. Cincinnati, O. Home of WLW- the Nations Station You're THERE with a Crosley ) )Tesd Mam) hen > eA AM? oo ss feta atls nai e img el ie ))= 4 >> <3) } wy a | tw le ate Bo 4 “i tie teed «, ae eee a wi ee , PAG we ED Tales BOR BM See

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Page 80

a SET! TT Ce Brou in _ Static ys I ’ ‘ } ‘ re "Ca ain H. W. never heard Atkins, S.S. 20-meter amateur tone are without antenna is new. Sydney, H. Taylor, Haverhill, Massachu- I've had would not WPT. ng like the HY-7 ilar receiver.” W1AGZ erial on the HY-7. It certainly is a W1CMP u don't s W1HN bragging “HY- Cc ry and D.C. kit get . Gets signals y enougi pout it, We're too mplet de sign data or either A.( busy descriptive Write for r DA Brummel his 5 rk Here's what H. E the Comoan special HY side of the Ha Batry “Younes Phone S-275353 ee ee rFORD-CONNECTICUT-U.S.A. BR Users St. gE > HAR Patent Pending TwoNew Con tactsfor You | above — the new t is now a standard part HH RESISTOR It has been uni pproved by Electrical and for its tive reduction of co ugh increased, ) f them is shown Contact that Our ¢ ( ches ixed coniact a ire and terminal er new contact is the one that we wel etween your organization and ours. We king RESISTORS for n impressive list ts in the industr There ure definite why you shou ld be mong them. May yu whi at they are Hardwick, Hindle, Inc. 218 Emmet St. Newark, N. J. way You Saw It in QS7 It Ident ment adopted in the consideration of questions ¢ policy brought forward by letters to some of the directors from some of their constituents. The members of the Board agreed to undertake th operation of a radio net of their own on the air the Directors’ Chain, and they elected Profesgo W oodruff as chairman thereof. The foregoing account is at best an outline of the definite actions taken by the Board. It cannot begin to record the discussions which took place on the many only of these questions but of about every other problem that could be thought of. In addition to their formal meeting the directors inspected the properties of the League the offices and the headquarters station W1MK and found time to better their acquaintance with the headquarters personnel and its work. Somebody recently wished out loud that when Warner wrote up these Board proceedings for QST he would cut out the moralizing, give a bald recountal of the facts, and refrain from “inter. preting.’’ We've done our best, but we can't refrain from concluding that it was a good meeting and that it shows that we have a strong and workable system of self-government in our League. angles not New Two-Volt Tubes Cont It will be noted that the mutual conductance of the new tube is about 50°; greater than that of its predecessor, with a slight decrease in plate resistance. Greater amplification can therefore be expected from the UX-232 when substituted for the Type ‘22 without any in circuit constants other than those necessitated by the lower filament voltage and a slight increase in the grid bias. When used in present receivers oper- ating from a 6-volt battery, both these changes can be made simultaneously by the insertion of a 50-ohm resistor in the negative leg of the filament, the grid return being made to the battery side of changes the resistor. Sereen-grid voltage should be obtained from a tap on the “B” battery rather than from a dropping resistor connected between the plate Variations in screen current of As with all and screen grid. individual tubes make this necessary. screen-grid tubes, the screen-grid should be by- passed to ground by a comparatively large condenser. The new tubes have been designed to be non- microphonic, and therefore should find wide application in automobile receivers and other portable sets. The low filament current and voltage make dry-cell operation entirely practical, although care should be taken to maintain the actual voltage on the filaments at not more than two volts. It is therefore recommended that filament voltmeter be employed, particularly when dry cells are used. fies You and Helps QST yrnet ~ Hu

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tions of of the is. The uke the the air rofessor tline of Cannot k place estions vuld be ing the eague . IMK ve with * nter- refrain ng and rkable tance ‘hat of PmM= THE BEST 1S NONE TOO IF You Orerry. 2% GOOD FOR YOUR TRANS- a USE THE BEST/ COMPLETE THORDARSON JusT A REMINDER — ELECTRIC PowER WE STILL HAVE AN SUPPLN- ES you'll AMATEUR LOG BOCK FOR HVA (930 7 AS THE HAM WHO DID NOT SIGNAL: OM ,/ GET ONE OR THE BEGINNER WHO WANTS TO KNOW, WHATS IT ALL ABOUT, SO SEND IN YOUR OSL CARD OR LETTER. iT HAS A LOT OF GQOD HAM DOPE IN [IT THAT YOU CAN USE, THORDARSON RIC MANUFACTURING CO. Huron, Kingsbury and Larrabee Sts. Chicago, U. S. A. plate ore be ed for ircult ry the in the oper- anges n of a ment, side of rom & ‘om a plate nt of ith all eC by- large » non- wide other and ‘tical, n the than hat a larly | | REGULATIONS pa REQUIRE | | | ADEQUATELY FILTERED | | ——— _ DIRECT CURRENT POWER SUPPLY! lL P| The best way to comply with these new regu- lations is to use Tung-Sol Filter Condensers. 1 Mfd. 1000 volts* OIL DIELECTRIC 1 Mfd. 2000 volts* | $6.00 > > » le $12.00 2 Mfd. 1000 volts* BETTER FILTERING 2 Mfd. 2000 volts* $12.00 LONGER LIFE $24.00 *Working voltage TUNG-SOL CONDENSERS, INC. 2317 Calumet Avenue, Chicago, Illinois Formerly Brown & Caine Condenser Specialists since 1920 Say You Saw It in QST — It Identifies You and Helps QST 83

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— FROST-RADIO engineers have banished noise from wire-wound volume controls! y use of wire-wound Volume Con- in Radio Receivers has presented the manufacturer of potentio tats. Previous standards and ufacture having proved to be radically new and different ma- oe : were required, and it remained ADIO Engineers to develop these perfected an automatic device for hing the contacting edge of the © perfectly forms the wire edges me ten-thousandth of an inch t between any adjacent wires. A ntacting surface is thus provided en that the new FROST-RADIO will withstand a fatigue test of sand half-cycles, at a speed of ste, without evidence of wear on tact arm, and that they are as per- “ompletion of test as before be- tise on the subject of volume con- epared by our research laboratory » send a copy to any interested HERBERT H. FROST, INC. and Factory: ELKHART, IND. J HE A.R.R.L. OG SHEET \ tlations Require Station Log ir station regulations of the ommission, announced in ge every amateur station to operating activity. Every keep a log. A.R.R.L. has for vears. Now it becomes er the regulations g gives proof of station trans- luable in checking up the work. Its presence identifies systematic one. The Govern- s it as a record of transmit- sed now in large quantities, Log Sheet has been substan- lhe new low prices 50e $1.00 1.75 Postpaid THE AMERICAN R [O RELAY LEAGUE I lartford, Conn., U.S.A. A few sampie tubes have been tested and found to work very satisfactorily on high frequencies Thumping the table or even the receiver itself | AN EXPLODED VIEW OF UX-2 failed to set up the usual annoying ringing noises common to most d.c. tubes, particularly those of the "99 Type. — G. G. Naval Reserve Holds Its First National Emergency Drill ( the Naval Reserve will be one of the largest. Aviation and radio are going forward hand in hand and the time has come already when avia- tion cannot get along without radio. In the future the operations of our surface, air and undersea fleets will become more and more dependent upon radio communication. Those of us who follow the military side of radio are qualifying ourselves for future service in time of need. New England Division Convention GBs. A good description of Aircraft Radio Equipment and the use of Beacons was given by Mr. A. P. Bock of Westinghouse. Mr. A. D. MacLeod, Champion Tube Works, Inc., brought the fellows some useful lephony in the Amateur Bands.” The call to the Banquet Hall came at about 6:30 p.m. Close to 225 were in attendance. Enter- tainment was furnished by an orchestra, and several Y L singers and dancers (ask Doc Tessmer, W1UM, about the YL). Director Best officiated as toastmaster and very ably carried out his part of the program. The speakers were President suggestions on “Te »s You and Helps OS7

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found Nncies, itself noises ose of G. rgest nd im avia- uture lersea upon w the es for on tadio yiven \. D. yught ‘Te bout nter- and smer, iated t his ident

— plate supply. their life. The advantages are: | l Protects the filter condensers Vitrohm Stabilizing Resistors When the plate potential of radio transmitters is supplied by filtering rectified A. C. it is common practice to connect a stabilizing resistor across the output of the from high peak voltages, which lengthens 4. Discharges condensers when key is 3. Tends to eliminate chirps.

open. 2. Steadies the note. | si ( Dy ; Send for « ar 507 Jul pul T otat Vitrobm Re ’ 1 ng Vitrohm esi s J ize stance | radio, It will be s — - — 25,000 ohms i at. 507-6 | “ out charge up | | st , 550 50, 100 ohms l Cat. 50 -68 1 You will find in this c ' Sy , 1 cular Vitrohm Resistors to 1000 50,000 ohms 2—Cat. 507-65 in series | ‘ 2-7 ‘ ; " ot , T = —_ , 1500 60,000 ohms 3—Cat. 507-5 in series | 2000 | 80,000 ohms —Cat. 507-5 in series

WARD LEONARD ELECTRIC CO. Mount Vernon, New York

Hl eet HALL’S ~:- We Pay the Postage OUR CATALOGUE IS READY Write for it — Lowest Prices Harrisurg, a We give you prompt service whether your order is large or small — All orders mailed the same day SPECIAL—100’ No. 12 Enamel Wire 75c

QUARTZ OSCILLATING CRYSTALS Scientifically Prepared for Maximum Power and Unconditionally Guaranteed 1 in. square sections tthin % af 1°/o of ur Specified fre cy). supplied promptly at the following prices 75-100 meters $12.50 100-200 meters 10.00 200-600 meters 15.00 1 in. Tested blanks, 200-400, 400-600 meters 5 00 Dustproof Bakelite mounts 3.00 An accurate Calibration furnished with each crystal Sections of any practicable dimensions made to order Charges for grinding to exact frequencies given on request J. T. Rooney, B. Sc., 4 Calumet Bidg., Buffalo, New York ifteen years’ crystallographic experience 4 pioneer crystal grinder "*

When You Go Calling on Hams Wear Your A.R.R.L. Emblem A handsome creation in extra-heavy rolled

good amateur. It identifies you — in the radio store, at the radio club, on the street, traveling — you can spot an amateur by it. Wear your emblem, OM, and take your proper place in the radio fraternity. Either style emblem, $1.00, postpaid. gold lapel button or pin-back style. The personal emblem has come to be known as the sign of a American Radio Relay League 1711 Park Street, Hartford, Conn. and black enamel, high, supplied in

1 Saw It in QST — It Identifies You and Helps QST 85

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“Whoa! FLoRADORA” ng a good ol’ mare she threw whenever trafic became hitable ler box on the modern street Floradora to shame d the control makes all the between raucous, crackly nd smooth, velvety reception TRALAB pertormance explains will vill tind these volume controls f modern sets 320-F for Free Booklet, Control, Voltage Control and Centralab Central Radio Laboratories 0 F, Keefe Ave., and Humboldt MILWAUKEE, WIS. Do You want to be a \ High Class Radio Operator? ‘e You can be a Clear, Fast / Sender, able to work with _ —/ + the best of them. You can be a Rapid, Accurate Re ceiver, able to copy the fast ter. The Successful Methods used t paid Radiomen are taught to The Candler System of High-Speed Telegraphing intensi ve training for developing ickly through Scientific t ries). It trains the Brain, Muscles »-ordinate in doing fast, accurate work r f Concentration; gives you ( ‘ yu sure of yourself at all times ed now is, we guarantee to increase peed q nd on ships at sea are successful and are taking the Candler S eed (55 wpm) to your System."*— | Champion Can copy fast stuff Radio-Typing Course is best for H. Bell, U.S.S. Idaho. Thousands of nt our offices from all over the Candler System o/ for ine f the “slow class"’ and do something, ion about this great Course and 45,000 operators. Give your what you want to accomplish. ng Course Th \NDLER SYSTEM CO. Dept. RL. Avenue Kedzie Chicago, Hlinois y You Saw It in QST ‘ Maxim, Radio Inspector C. C. Kolster, Major Platt, K. B. Warner, A. A. Hebert and E. |, Battey. The call for state and district delegations revealed hams from each New England state and the 2nd, 3rd, 5th and 9th districts. Last, but not least, on the program was the distribution of prizes. Providence was chosen as the seat of next year’s convention. The Worcester Radio Association, under whose auspices this convention was held, did a mighty fine job of it, and they have set a high example to be followed by other committees. Save your pennies for 1931 at Providence! Silent Kevs It is with deep regret that we record the passing of these amateurs: Glenn G. Austin, W3ARK-W3AMG, Washington, D. C. J. MeRobb, VE2AU, Montreal, P. Q. Ralph B. Nelson, W6CBN, Alameda, Calif. H. L. Robinson, VE2BC, Montreal, P. Q. Ge Strays “Ss Correction The following amendments should be made to “The ABC of Filter Design,’ April QST. In Fig. 9, 2, should be 100,000 ohms instead of 50,000 Page 37, left-hand column: _rpXRo_ 2X10 = +h. — 16666 ohms. Therefore Z,; or Zxr= 16666 ohms. R 0797 X 16666 bs=~30000 79700 Cuse-= 30000 X 166066 000239ufd. Page 38, left-hand column: 100000 + 110000) 10° = OGGA. A =- nd ane + 3.14 K 100000 X 110000 & 8350 = 000182 ufd. ' 7 100000 x 10% *\efa-) 3.14 110000 X 10000 X 8350 00346 ufd. The equations on page 37 can be changed to give the results directly in microfarads and millihenrys if put in the following form: (fi te) 10° “ Cc fi X 10° 6 ala f o°“eQGQGVe ) 4) d x fe fo —f, ) Z fo—fi) ZK 10 Le mh = — \d , dor fi fo It Identifies You and Helps QsT

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Major E. L ations te and ut not ion of f next whose lighty ample » Your ide to pad of ed to and Acme has a new line of trans- formers and chokes 43 different items. Just drop a card today to the Acme Apparatus Corpor ition, Cam- bridge, Mass., Dept. Q-2, ask for Bulletins 110, 111 and HP and learn all about this new apparatus. (O SEND FOR THESE BULLETINS A brand new line of transformers and chokes Se v AC ME ~ for transmission ~ COLYVe ~ Since vacuum tube transmission began, Acme has been making trans- formers and choke coils, and every- Spark Transformers in the early days. one remembers the Acme - Scientifically designed and constructed. Unexceiled for eye and output. ee TSD, Two-b stretched diaphragm. A truly tton type, BROADCAST MICROPHONES | 7 | gion instrument $60.00 E SHD, S e butto Exceller for ording ha oe > . Pi 2 ee oF ee ae 18 Boylston Street, Boston Write for circulars nd full details e ‘ats > Expert repa and overhaul: me on ull types ’ Rea ble rate Send for Catalogue RADIOSHONE ENGINEERING BURE AU Tel. Hancock 8184 Established 1905 O. Box 88, Salem, Mass aD Massachusetts Radio and Telegraph School ee CONDENSERS d for interesting data and | sheet on ransmission Cor isers vith workir ( ges U t 3000 D.C for use with the tub s: 203A, 204A, 210, SOOW, 851 852, 860, 865 MFG. CO. New York CORNELL ELECTRIC Long Island City oi = anny Quartz Crystals Guaranteed asy oscillators « arefully selected and ground for maximum output 1715-2000 kc $15.00 3500-4000 ke 15.00 7000-7300 ke 20.00 All crystals are calibrated within 1/10 of 1% of the frequency. Ground to % of 1% of the fre- quency specified. Ground to 1/10 of 1% of $2.00 additional. Precision crystals can be supplied from 14000 ke 20) to 15 ke (20000) on order. B. F. WALTER 43 Bleecker Street Newark, N. J. Irequency specified, — SUPER-DAVOHM RESISTORS preferred and specified by ex- perts the world over, for.... laboratory standard high voltage regulators vacuum tube plate resistors vacuum tube grid resistors v Sematen multipliers telephone equipment television amplifiers fading controls isolation resistances Catalog If your dealer cannot s you write us THE DAVEN COMPANY 158 Summit Street, Newark, N. J. Resistor Specialists ue sent on request ipply ‘‘Standards of Efficiency’’ 5 to 5 million ohms; guaranteed 1°) tolerance Say Ye yu Saw It in QST — It Identi fies You and Helps QST

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RIEMA, tnc. Export Mamagers o~ York N.Y ~~ ally equipped cally export le receiving mitting radio it's EASY to Get a HANDBOOK (Sixth Edition) DIRECTIONS: Re ne that Handbook must be hac roceed as follows: Fill out below, tear off. Reach in U.S. pocket, produce \. $1 bill, old or new size (we don’t care). Clip together, mail us. H ok Factory, 17 k. Hartford. D IT AT ONCE, —_ (Name) Street or P. O. Box) (City and State) Say You Saw It in QS7 "— It Identifies You and Helps QST When examining the edges of a crystal for smg cracks or chips, the range finder of an ordingy Kodak makes a first-rate microscope. Hold th crystal next to the finder and get your eye x close as possible. The finder has more magnifies. tion than a reading glass ex WEBOY, Wé6BzW W2AUY recently built a Zepp antenna, ang his YL wanted to know what the “ladder” wy for! A band-spreading condenser of the split-state type can be made quite easily from an old two. gang condenser. This eliminates the difficulty of insulating the two stator portions from eac other. — W2AVS Another newspaper gem: ‘‘It takes at least one microphone to by-pass audio-frequency currents and that is what you are trying to get rid of.” A Crosley ‘‘Musicone” frame makes a good- looking microphone stand. Three brass spring from the 5-and-10 form the suspension. The three-cornered spider on the frame should be cut out with a hacksaw and the rough edges finished off with a file or hammer. The frames can often be picked up for a nominal sum at a junk shop. \ handy gadget for holding a pick-up lamp during tuning, neutralizing, ete., is a spring clothes-pin. A flashlight lamp socket can be mounted on it, and the loop formed by a piece of wire between the two screws on the socket. By this means the lamps can be readily replaced. The business end of the clothes-pin is of course clamped over the tubing in the inductance. — R. B. Southworth The tin cans that the old DeForest tubes were packed in make excellent tube shields, according to W9ACC. The screw top serves as a mounting base, and the can can be cut off at the other end to the required length. W9ACC also suggests that the large-size salt shakers (1 to 114 pints capacity) obtainable at 5- and 10-cent stores can be used in the same way to form coil shields. We have received some complaints from QST advertisers to the effect that they often receive orders from hams who neglect to sign their names or give addresses. Incidentally, this also goes for a lot of fellows who write in to Headquarters. Naturally the recipient of the letters can’t be expected to have clairvoyant powers or some sort of divining rod to make the missing dope disclose itself. So be sure to give your name and complete address when writing if you have any hope of receiving an answer. Call-letters are not enough; they change so fast the call-book people have & hard job keeping up with them. WS8JT calls our attention to the fact that the winding form of the 75-watt size Electrad resis tor makes a good form for a space-wound rf. choke. There are 107 grooves on this size. M4

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r smal dinar Id the eye & mifics. 'BZW a, and ” wy -Stator d two- iculty n each ast One urrents of - good- springs 1. The be cut inished 1 often he p » lamp spring ‘an be lece of et By placed course ctance “S Were “ording yunting ver end iggests > pints res cal ls n QST receive

OST Oscillating AMATEUR BANDS: BROADCAST BAND: Power crystals ground in the accurate to plus or minus 500 « fied frequency fully mounted f please specify type ycles of your speci P. O. Box 86

S is coming, and no doubt you are g er ir transmitter removing those weak links us to get the most possible efhciency trom your set. One item of great import is the frequency tability of your set. Does it stay on one frequency! If not, our power crystals will solve that problem. ScIENTI Rapio SERVICE crystals are known to be the best obtainable, having ONE single frequency d highest output. With each crystal is furnished in accurate calibration guaranteed to better than tenth of 1%. New price for grinding power r the amateur bar ire a llows 1715 to 2000 Ke band $15.00 (unmounted) 3500 to 4000 Kc band $20.00 (unmounted) 7000 to 7300 Ke band $40.00 (unmounted 550-1500 Kc band r $55.00. In ordering plate voltage and operating

Crystals REDUCED PRICES EFFECTIVE APRIL Ist, 1930 bsolutely and frequency days after rece temperature All crystals gards to output be made within tw guaranteed and delivery can ipt of your order. CONSTANT TEMPERATURE HEATER UNITS: We can supply heater units guaranteed to keep the temperature of the crystals constant to better than a tenth of 1 degree centigrade for $300.00. [T'wo matched crystals, ground to your assigned frequency in the 550-1500 Kc band with the heater init complete $410.00. More detailed description of this unit sent upon request. ATTENTION AIRCRAFT AND COMMERCIAL RADIO CORPORATIONS: We invite your inquiries regards your crystal needs for Radio use. We will be glad to quote special pricesfor POWER crystals in quantity lots. We have been grinding power crystals for over seven years being pioneers in this specialized field, we feel we can be of real service to you. We can grind power crystals to your specified frequency curate to plus or minus .03°%. All crystals guaran- teed and prompt deliveries can be made. A trial nvince you, SCIENTIFIC RADIO SERVICE ‘“*‘THE CRYSTAL SPECIALISTS” Dept. P-12 Mount Rainier, Maryland

| We design special equipment to order | covering Short Wave mitters | Laboratory Instruments | Power Supply, ete. | Send in your complete specifications | and we will immediately forward our | estimates. | Calibrated Wavemeter | Range 17 to 200 meters Audio Oscillator 40 to 5000 cycles | Wireless Egert Engineering Inc. 179 Greenwich Street, New York City, N. Y. Receivers and Trans- $12.50 17.50 EVER INCREASING SUPERIOR CONDENSERS A FEW OF THE

names oes for jarters. in’t be ne sort lisclose omplete ope of nough; have & nat the | resis nd rf.

BECOME A RADIO OPERATOR See the World, Earn a Good Income, Duties Light and Fascinating LEARN IN THE SECOND PORT U.S.A. Radio Inspector located here operators for the various Gulf ports in the U. S. A. to come to for training Our students qualify for the various branches of radio. Runs to all parts of the world. Positions Ashore and Afloat. Special courses. Day and Night classes. Enrollany time. Oldest and Largest Radio School South. New Orleans supplies Most logical location Literature on request GULF RADIO SCHOOL 844 Howard Ave. New Orleans, La. REASONS ‘| WHY! HIGHEST QUALITY CONSERVATIVE RATING REASONABLE PRICE PROMPT DELIVERY Catalog No. A. M. FLECHTHEIM & CoO., INc. 136 Liberty Street Me: = — <<a

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A MAD — Pp 1) COILS This Advanced Photo Cell ved operation of Sound Pic- ment: Sorting, Checking, and Equipment; Railway Signal : Chemical and Medicinal Analy- Alarms: and dozens of other ind electrical devices, 1y for complete information Arcturus Photolytic Cell, and | in photo-electric research. ; Division, Arcturus Radio uy. Newark, New Jerse Up RCTURU HOTOLYTIC CELL The Electric Eye for Every Industry RS OF ARCTURUS BLUE TUBES Thor Encircles heWwORLD ROMANCE IN TELEGRAPHY “le is in t ‘ EPLEX CO St.. New York [eleplex ¥y, Quickly Tea touch with the world g money. LEARN A CEN iteral Write for informa- tion and prices NT ELECTRIC CoO., Inc. uc Say You Saw It in @ST — It Identifies You and Helps QST New York City Heard in a ham supply store: Ham: ‘‘Gimme a double-O one condenser.” Salesman: ‘“ Fixed?”’ Ham: “ Naw! I wanta new one.”’ —W9FGQ W6BGC suggests that aluminum meat loaf pans, obtainable almost anywhere for about twenty-five cents, are fine for stage shields. The pan is mounted upside-down on an aluminum sheet of the same size. Charles S. Taplor, 1883-1930 T is with deep regret that we must chronicle the passing of C. 8S. Taylor, WSPJ, at Buffalo on March 4th. He was nearly 47 years old. Known as the friend of every amateur in the region, he had been active in amateur radio affairs in the Western New York Section for a num- ber of years. He was Section Communica- tions Manager and Secretary-Treasurer of the Radio Association of Western New York He was born in Buffalo, New York, May 18, 1883, his first interest in wireless com- munication being aroused by attendance at meetings of the Buffalo Wireless Club about 1912. Experimenting with the crude apparatus of the time his “spark” was first heard on the air about 1915. He con- tinued an ardent student of radio until the coming of the war temporarily silenced the amateur When the ban was lifted after the war WSPJ again returned to the air. Taylor was prominent in the early development of amateur radiophone in Western New York, coming on the air with ‘phone late in 1920. He introduced to the Buffalo Police Department the possibilities of this type of communication. News items were broad- cast. All early Buffalo radio fans heard his voice and listened to his entertainments. During 1921 the transmitter was moved to the Elmwood Music Hall in Buffalo. A concert by Geraldine Farrar was broad- cast, the first high class broadcast for the vicinity. These early incidents held his interest Continuous activity identified Taylor with all developments of amateur radio. In 1926 his activity in the A.R.R.L. field organization resulted in his election as Section Communications Manager of Western New York, a position held and the duties of the office faithfully and care- fully executed until his death. He was Secretary-Treasurer of the Radio Associa- tion of Western New York for two years and also an active member of the Volunteer Naval Communication Reserve. His key is silent but he will be remembered by all as a real friend

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\UGUST, 1930

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WELLO- HELLO SAY OM \ THINK ABOUT 5 TURNS 15 oK - OR Mayvee "as 10 WOULD BE BEXCER) TREM 1 STANRING wn ra = ea | © _ Of Course You Can Gel | Advice Like This — - ButToBeSure, Consult | Your Handbook ther you are a new amateur, wondering where to FRR, RAs for your licenses, or what the other fellow means he tells you “OSD” her you are an older amateur, looking for up-to- inute dope on that revamped power supply to comply with the new regu- er you are a phone man wanting to know what combination of tubes to use 100°) modulation job hether you are just a plain ham. trying to get along You ll find the right answer to your questions every time in THE RADIO AMATEUR’S HANDBOOK By HANDY and HULL Now in its 80th thousand Published for amateurs by the amateur’s own organ- ization, its more than 200 pages are chock-full of just the kind of dope that you need in building and ng your station. All over the world the Handbook has been sent, in six ssive editions, to tell its story of practical amateur radio to beginner and old- r alike. Everywhere it is hailed as the greatest fund of helpful information that ileur ever saw. rid of valuable information, printed in “QST™ format and bound in durable vers so that the price may be modest. po at = tee Blue-and-Gold Paper Cover. 81.00 Stuff Buckram Binding, $2.00 We honestly don’t see how you can get along without the Handbook. Order yours today! AMERICAN RADIO RELAY LEAGUE HARTFORD, CONN... U.S. A.

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regu- () Use K ran- l of and six old- that able Jhe Official Organ of the ARRL VOLUME XIV AUGUST, 1930 NUMBER 8 Editorials . Central Division Convention Northwestern Division Convention Pacific Division Convention , ee The Story of PMZ , J hg Ng ees Harry Wells, W3ZD Midwest Division Convention ; Dummy Antennas Guy C. Omer, Jr. The International Relay Competition . EB. L. Battey Say, Son — The Old Man Operating Characteristics of Vacuum-Tube Detectors H. A. Robinson, W3LW Naval Reserve Coéperates with Red Cross Standard Frequency System News New England Division Convention Midwest Division Convention Finding the Expeditions chee & sick GIs go ele Se me oe First Conviction Under the Radio Act ~? £ Porter H. Quinby, W9DXY Experimenters’ Section The Hudson Division Convention W9ANZ I.A.R.U. News Communications Department Calls Heard — Correspondence Department , WWYV Standard Frequency Schedules Ham-ads and QRA’s QST’s Index of Advertisers OST is published monthly by The American Radio Relay League, Inc., at Hartford, Conn., U. S. A. Official Organ of the A.R.R.L. and the International Amateur Radio Union Kenneth B. Warner (Secretary, A.R.R.L.), Editor-in-Chief and Business Manager James J. Lamb George Grammer Clark C, Rodimon Technical Editor Assistant Technical Editor Managing Editor David H. Houghton G. Donald Meserve Circulation Manager Advertising Manager Advertising Offices . we eeeeees.. 55 West 42d Street, New York City Editorial Offices ... 1711 Park Street, Hartford Subscription rate in United States and Possessions, Canada, and all countries in the American Postal Union, $2.50 per year, postpaid. Single copies, 25 cents. Foreign countries not in American Postal Union, $3.00 per year, postpaid. Remittances should be by international postal or express money order or bank draft negotiable in the U. 8S. and for an equivalent amount in U.S. funds. Entered as second-class matter May 29, 1919, at the post office at Hartford, Connecticut, under the Act of Marcb 3, 1879. Ac- ceptance for mailing at special rate of postage provided for in section 1103, Act of October 3, 1917, authorized September 9, 1922. Additional entry at Concord, N. H., authorized February 21, 1929, under the Act of February 28, 1925. Copyright 1930 by the American Radio Relay League, Inc. Title registered at United States Patent Office.

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A NEW POTENTIOMETER Pfs B eter is a distinctly new type of poten nusual in design and marvelous in performa roximately fifty solid resistance discs ore »d between thin metal discs. A con- tact arm one end of the resistance column to the ot The re slue of each disc is separately contro total number of discs can be ar- ranged nce with any resistance-rotation curve de ther type of resistor offers such flexibilit stion of resistance so essential in mode tube circuits. 2 Type AA Double Bradieyometer i Type AAA Triple Bradleyometer .»- BUILT ON A NEW PRINCIPLE One or more Bradleyometers can be arranged to operate with one knob. Each Bradleyometer has its own resistance characteristic as shown in the diagram above. In this manner, mixer controls, T-pad and H-pad attenuators and other complex controls con be provided. The extraordinary performance of the new Bradleyometer, its silent operation, and its unlimited adaptability can be appreciated only by installing a Bradleyometer in a test circuit. Samples will be gladly furnished to set manufacturers. re made in esizeswithor 0 | en LY Bradleyunits 6 BRADLEYUNIT RESISTORS ALL APPLICATIONS . without tinned eads. All nits are color- e oded to meet set manufac- rers’ specifi cations. sre solid molded resistors unaffected by tem e or age. Their accurate calibration, grec strength and permanence make them . 3 correct C-bias, plate voltage, screen 5 se as gridleaks and as fixed resistors BRADLEY SUPPRESSORS FOR RADIO-EQUIPPED CARS These special solid molded resistors are now used by prominent car manufacturers to provide individual resistors for each spark plug and for the common cable to the dis- tributor on radio-equipped cars. They increase the resist- ance of the high tension ignition system and minimize the disturbing oscillations in the ignition circuit which interfere with the radio receiver in the car. When used with suitable by-poss condensers in other ports of the circuit, shielded ignition cables ore unnecessary. They do not affect the operation of the motor. For complete information on Allen-Bradley Resistors address ALLEN-BRADLEY CO. 277 Greenfield Avenue Milwaukee, Wisconsin ALLEN-BRADLEY RESISTORS Produced by the makers of Allen-Bradley Control Apparatus y You Saw It in QS7 It Identifies You and Helps QST

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PLE ranged has its j|agram id ond ols con e new limited talling will be I il EDITORIALS HENEVER our morning mail discloses an envelope with the writing all snarled up because of the frenzy of the writer, we know what it’s about before we open it. It’s some member writing in to QST to give us the devil for pub- lishing some article which he thinks ‘‘too technical.'’ Whenever we publish even the simplest algebra we retire to our bomb-proof dugouts for a week after the issue is out. And we know by long experience that if an article isn’t A-B-C in style, with complete specifications for building something or other, there are far too many amateurs who won't try to understand it, irrespective of its merits, but who, more or less vocally, are displeased with its very appearance in our pages. We think that QST is an intensely practical magazine; it is famed for the direct help it brings to practicing amateurs. But amateurs should know something about radio, should be able to think some for themselves, should not have always to follow con- structional specifications blindly. Partly for these reasons, partly because there are some subjects not yet reduced to successful practice, QST also has articles which deal with the theoretical side of things radio, and it is these stories which are so often scorned by the practical amateur. Fortunately, not all amateurs scorn them, and it happens that right now we're able to point to practical benefits from the ‘‘too technical’’ articles that ought to satisfy all hands. For instance, in our July issue there was an article on a better, more efficient and compact chemical rectifier which places the “‘chem”’ right up in the front row as a unit in ham plate supplies. It was directly based on Kryter’s theoretical article on rectifiers in April of last year. There are important developments on the fire right now in the dynatron frequency meter, soon to appear in QST. They are based on an out-and-out ‘‘too-technical’’ article, ‘“The Dynatron,’’ which we published last February. The filter portion of Grammer’s rectifier and filter yarn in June is based on Zottu's ‘‘too-technical’’ article which ran in April. These practical follow-up constructional articles would never have been born without the fertilizing influence of the ‘‘too-technical"’ articles. They may be castor oil to some of us, but they're good for the system. We shouldn't think we're being “ gypped”’ because we don’t understand them all. Other amateurs of greater experience will take up these articles and sooner or later bring practical how-many-turns stuff to QST’s pages which means an otherwise unattainable advance in amateur technique. There is increasing indication of a change in the way amateurs go about their develop- ments the QST staff believes that we are in a period of transition in amateur practice, transition from blind experimenting and empiricism to real research. We don’t mean research of the pure-physics variety as much as intensely practical research. Surfeited with merely knowing how to assemble apparatus which works well, we amateurs as a group seem now to be st: urting back over the route to find out what makes our circuits tick. In the process we are finding out a lot of things and again definitely improving our apparatus and technique. The push-pull transmitter described in our June issue was an excellent example of this; the dynatron exploration now under way is another; so are the recent developments in 28-mc. and directive transmission work, requiring as they do a knowledge of pure physics for their intelligent attack. The moral in all this is that the amateur who has thrown his old high-school physics book in the junk-box had better fish it out and read up on electron theory, light, reflection and refraction, and so on — all of which are pertinent to amateur radio of today.

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W Hot + Cen M { \ De ‘> OST AveustT, 1930 [ means thus to announce that it is going in for more and more theory. is simply that fundamental appreciation of what's happening in radio p every department of a practical amateur’s work. QST’s articles will f, by and for,’’ because that’s our very purpose in life. by the bye, that a couple of other magazines are claiming a little too ey have ‘‘short waves’’ by the tail and are the only reliable purveyors of reon \in't that somethin’! K. B. W. il Division Convention n, Ohio, August 30th-3ist Ohio Section) Open sesame! The Central Convention is to be held in Ohio, Saturday, and Sunday, | Slst, at the New Biltmore ispices of the Dayton Amateur \\ hile there will be some good the intention of the Commit- me 90°, good times. It being Committee to start things early nned to have something for Dayton Friday evening. The is the price -it is only $3.50 r this convention are: D. J Director; IK. B. Warner, Secre- Manager, and C. C. Rodimon, CAS T ) is extended to all amateurs well as those in other sections i will see what we will do for Mr. L. E. Furrow, General n Committee, Post Office thwestern Division Convention 'th-30th at Spokane, Wash. Spokane, Wash., fellow ama- tend the annual A.R.R.L mvention to be held Friday rust 2Oth and 30th, at the Hotel being sponsored by the Radio Those of you who attended here three years ago well affair given, and the com- that the visiting members program far in excess of pted. There will be plenty of inquet supreme for the last night is being arranged for at the ‘‘Oasis”’ in connection with the Dessert Hotel. We are hoping to have Mr. A. L. Budlong, Assistant Secretary, A.R.R.L., as Headquarter's representative; if not, Fieldman Hebert will be here. We are doing our best to secure Howard F. Mason, of Seattle, who has been with the Byrd Expedition, as our guest of honor. There are many other things in the wind, but we cannot make the announcement at this writing. Rest assured, however, that a cordial reception awaits all delegates. Just drop a line to J. L. Moon, Secre- tary, W. 3823 Heroy Ave., Spokane, Wash. Pacific Division Convention Honolulu, T. H., August 8th-10th (Hawaii Section REETINGS! The Hawaiian Section of the Pacific Division, through its Section Communications Manager, extends to all amateurs a cordial invitation to attend its first convention to be held in Honolulu on the Sth to the 10th of August. Radio your reservation to L. A. Walworth, SCM, 2737 Ferdinand Ave., Honolulu, T. H. S@e- Strays “Hy Mr. W. D. Terrell, Chief of the Radio Division of the Department of Commerce, has announced the creation by the Secretary of Commerce of the post of Traveling Radio Supervisor and the assignment thereto of Mr. Arthur Batcheller, for many years the Supervisor of Radio at New York. Mr. Batcheller’s new duties are those of an executive liaison officer, coérdinating the activi- ties of the twenty field establishments main- tained by the Radio Division — the nine district offices, ten sub-offices, and the Grand Island Nebr.) monitoring station. His successor in the Second District has not been chosen at this writing. pa tI als an Ig ms ect for pr tra the se] qu thi Re Sug ple uni por mil do\ by t.p tot sho Pla sm sin; Afri Epr

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LO Il of ill e- Aveust, 1930 OST 9 The Story of PMZ By Harry Wells, W3ZD* ROBABLY the first thing you fellows would ask if we were all able to get together would be, “‘ How did you happen to get the lucky break’’—so let’s start off with a football game. If I hadn’t decided to return to Washington from Pittsburgh, where | had been working with the Westinghouse Company, in the fall of 1928 for the homecoming game of the University of Maryland with the University of Virginia, the following events would never have happened; to me anyway. The day following the game I noticed a news dispatch concerning the All-American Lyric Malaysian Expedition which would go in the near future to Borneo with a small party of scientists for the purpose of making a study of the primitive na- tives, to obtain geographical data, and also to make observations on tropical and equatorial radio conditions. Through the medium of the clipping [got in touch with Mr. Theodore Seel- mann of Chicago, the leader of the proj- et. It developed that he was looking for someone with certain operating and prac tical experience as W ellas technical training, and I was lucky enough to get the appointment. So, carly in 1929 I proceeded with the This complete equipment, comprising trans- mitter, gas-engine generator, receiver, telescopic mast and odd parts, weighed less than 200 pounds packed in sturdy canvas containers and could be erected by several men in a very short time. The emergency transmitter was a bread-board high-C Hartley incorporating a UX-210, the plate supply of which was obtained from a 12-to- 350-volt dynamotor. This was built and tested at W3ZD. Our portable job was a Burgess aircraft type unit comprising two 201-A tubes in a m.o.p.a. circuit with the power supplied entirely from batteries. Wherever possible, every piece of equipment selection of the various equipment re- quired by our party. In connection with PRIMITIVE DYAKS GATHERED AROUND A PORTABLE this | wish to offer particular thanks to Dr. J. H. Dellinger of the United The nat iaded fris States Bureau of Standards and Mr. pape jor INSTALLATION ON THE MORUNG RIVER believed that the radio was white man's magic which per- i] twntohs to carry the messages. The banner which two of the as the official flag of the expedition. It was left at the PMZ Lawrence Hyland of the U.S. Naval — Shrine at the headwaters of the Morung River. esearch Laboratories, whose timely suggestions were of considerable assistance. It was considered advisable to have three com- plete and separate transmitting and receiving units: the first a fairly long-range and semi- portable outfit; the second an emergency trans- mitter to be used in case of any serious break- down; and the third the portable job to be used by the advance parties for contact with the base. The main transmitter unit was a fifty-watt tp.t.g. Marine Corps type outfit supplied “in toto” by the firm of Heintz and Kaufman, short-wave radio specialists of San Francisco. Plate and filament currents were supplied from a small duplex 240-cycle generator driven by a single-cylinder two-cycle gasoline « ngine. ! * 219 East Poplar St., San Mateo, Calif This set is identical with that used by W60OJ in his adventure and was described in July QS7 was especially sealed or impregnated as an added protection against the disastrous effects of the tropical moisture. Preparations were completed by the latter part of March and our party of four Americans includ- ing Mr. Theodore Seelmann, with Mr. and Mrs. John H. Provinse of the University of Chicago, embarked on April 3 from Seattle. Mrs. Pro- vinse was to accompany her husband as far as Java. By keeping the strictest personal supervision over the shipping and handling of our equipment we were able to get everything to Borneo without any serious mishaps. Our nearest calamity oc- curred when a Dutch mate stowed the box con- taining the storage battery acid upside down the hold. Luckily, when the mistake was discovered several days later the corks were still holding.

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ge outward was made by way of Philippine Islands, the Celebes \fter just two months we were to get npse of Borneo. However, that long nent didn’t present a very enticing heat seemed to come rolling out to ill coastwise steamer. The shoreline te and appeared as a rather depressing mp and jungle. val at Bandjermasin, the capitol of neo and a town of 40,000 population, MANILA PI. USA EQUATOR EASTERN AUSTRALIA WHERE IT ALL HAPPENED r the yurney's end: here was left the th the A.R.R.L. emblem. The mate great-circle directions to the Eastern Australia. Captain DeQuant hour’s march jron PMZ's base at few hundred are whites, we pro- final preparations for our trip Chere we were also initiated into hunt. from Soerabaya to Bandjermasin equainted with a skin buyer who strange tales of Borneo’s huge life and promised to take us es nearby where one could see rocodiles in an evening. So one icked a large boat with guns, s, and started out. We paddled igh the myriads of interconnecting ls in the vicinity of Bandjermasin, deserted stretch of river lined jungle as our hunting grounds. light was connected to a storage how. One man took his position boat gently drifted through the tropical night, cast the light the OST AuGusT, 1930 upon the river banks. Another .nan, with the sights of his rifle whitened, was stationed jm. mediately behind the light quiet: , awaiting the tell-tale bright red reflection ef the crocodile’s eyes. When one was spotted we would maneuver the boat within range and he would then take g dead bead on the eyes only, for that is the most vulnerable spot. In the course of the evening we saw dozens of crocodiles both large and small, but most of the old boys were a little too smart for our amateurish methods and we were onh successful in bagging several of the smaller ¢ ranging from 4 to 7 feet in length. INTO THE INTERIOR The trip up the Barito River proved most interesting. At times the progress of the little Dutch river boat, would be almost completely blocked by vast quantities of water hyacinths which would form a solid mass from bank to bank. The strange jungle odors, the bright-hued tropical birds flying overhead, the herds of chattering monkeys playing along the banks, the occasional wild boar or deer seen cautiously quenching its thirst, the crocodiles or snakes gliding through the muddy, sluggish water, all seemed to be crying, “This is the road to adventure and the real things of life.” One week after leaving Bandjermasin our boat pulled into Poeroeck Tjahoe, the last Dutch military outpost on the Barito, some 250 miles from the coast and directly on the Equator. Here the entire white population, consisting of the post commander, Captain J. C. DeQuant, two young lieutenants and a doctor, turned out to welcome our party to the place which was to be our headquarters for the coming months. At 3:30 in the afternoon we started unloading equipment. Naturally I was anxious to get PMZ on the air as soon as possible to establish con- tacts, start getting schedules arranged and also to determine with what sort of conditions we would have to contend. We all dropped everything else and commenced unpacking the radio equipment. By dusk the telescopic mast was erected and the assembly of the rest of the transmitting equip- ment was well under way. The unusual burst of activity in that ordinarily quiet and slow-moving community attracted considerable attention among the natives; word rapidly spread that strange and new white man’s wonder was about to be demon- strated. Soon the entire population of the kam- pong was quietly and expectantly squatting around my network of wires and instruments. Finally all was ready. The gas engine started on the second spin. The transmitter was roughly tuned to the 7-me. band. I put on the “cans” and picked up a fair signal through a terrible mess of QRN. “CQ CQ CQ de W6BYY W6BYY .. . AR.” Ted gave the gas engine a twist and off she Ne gara, some Au roal —t soo! By cam whi wild Gen 1 was scat } ugh for jun, The thei to | par: “alr mes ( fact vie" affe all wo in, che to wo spa wo wo Ph

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T, 1930 vith the ned im- | ting th codile’s aneuver 1 take a he most ning we 1 small, O smart re onh ler ¢ d most litth almost r water ‘S from rs, the ud, the ng the r seen codiles uggish e road r boat Dutch miles uator. of the |, two ut to to be ading PMZ | COn- lso to vould u else nent. d the quip- arily ucted word new mon- <am- tting pnts. rted ghly uns” rible \ hg she

i

AueustT, 1930 roared. I ansyered with a long appealing call _ the first time on the air for PMZ. (We would soon know wnt that little outfit would do.) By all that’s holy in ham language, W6BYY came right back at us! Those thousands of miles which separated our little group in the heart of wildest Borneo had vanished into the ether. Gentlemen, that was a thrill. To the brown-skinned natives the gas engine was the greatest curiosity and the news quickly scattered that we were doing wonderful things Poeroeck Tjahoe and had a contraption which ild make a noise like thunder and revolve like wghtning. Whole families travelled OST

11 Reliable schedules were soon established with the Philippine Islands and California. The majority of our traffic, such as the daily report to the Chicago offices, was handled through the P. I. stations of Sergeant Paul Holbrook, KA1AF, and Commander 8. M. Mathes, KAICY. Mr. L. R. Potter, W6AKW, and Colonel Clair Foster, W6HM, took most of the messages to be sent direct from PMZ to the U.S. A. As had been expected, the moisture and static were our chief persecutors. It is interesting that the equipment which has been especially sealed and impregnated held up O. K., but that a

for days through the depths of the jungle merely to watch our activities. The radio, of course, was far beyond their comprehension, so they preferred to believe that by means of this ap- paratus we were able to induce friendly “antohs”’ or spirits to carry forth our messages. Our first QSO’s were not very satis- factory from an operating point of view because the humid atmosphere affected the carburetion. In spite of all possible adjustments, every time I

would shut down the engine to listen in, it would invariably become so badly to come back at the other station it ¢, would be necessary first to pull the spark plug and wipe that off before the engine would start. During the intermission the QSO would be lost. It did not require much foresight to see that if PMZ were ever to be air this - . | a success on the , é — : u

+

= — TED SEELMANN ENTERTAINS A GUEST WITH

“LYRIC” MUSIC Mr. Seelmann is, of course, the ntleman at the lef ondition would have to be corrected. \ccord- ingly as the erection of our base camp progressed I deve loped a method of shielding the ignition so that reception could be obtained without any electrical QRM_ while the engine ‘ontinued running at slow speed with the clutch notice able disengaged. s fr choked or flooded that when I'd want e ~ Bee

1T NONOKLIWON THE SHACK OF PMZ that the wt with W6AKW was made. The genitle- wainst the floor are John H. Provinse, of the ym here cont University of transformer which was exposed for a test de- veloped an open circuit within two weeks. There were invariably thunderstorms in the vicinity, so several types of so-called ‘“ quiet”’ antennas were tried in attempts to reduce the noise level, but the ancient Beverage type, long and low, was the one which gave by far the best results. This antenna was about 300 feet long, never over eight feet the earth, and grounded at the far end through a resistance of 200 ohms. The free end was pointed in the gen- eral direction of the U. S. A. and gave a decided directional effect. The transmitter antenna used at the PMZ base was a single wire about 200 feet long and 30 feet high, fed by a quarter-wave “ladder,’’ for 7320-ke. operation. This arrangement put one and a half full waves on the radiator. After gradually becoming accustomed to the heat and direct rays of the sun, we started plans for our first real exploration trip. The Dutch Government had very courteously offered mili- was above tary assistance whenever possible, so it agreed to make an attempt to reach the head- of the Murung River territory never before seen by a white man — while at the same time making a search for the most primitive of natives, the nomadic Punan Dvyaks. Some tests on the portable transmitter showed waters treacherous ~

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] i of the W3ZD emergency set using vith 300 volts of batteries at an input a half watts. It was decided, there- instead of using the portable jobs nitter, DYAK MEDICINE MAN and whatnot over his patient's head tact from the field party to the ld attempt direct QSO with the rse was advisable since in the short it was impossible to train any r of the party sufficiently in its complete with batteries and ng wires, tubes and spare parts, a water-tight metal box. The tor’s kit receiver was protected ooden casing and a heavy canvas 0 units comprising our complete und receiving apparatus weighed ds, just making a good load for idle of July all was in readiness for tain J. C. DeQuant, post com- troleur of a portion of Central than all of Holland, was in charge Seelmann and myself completed sonnel. Five convicts, who were Poeroek Tjahoe for murder, to assist in the paddling and do OST Philippine Islands could be worked with Aucust, 19¥ the cooking. Our Chinese boy, Lim, was ny interested in seeing any wilder people. Othe natives were secured to help paddle our boa from one kampong to the next. Everything perishable was packed in those five-gallon gay. line tins which are so indispensable in the tropic For the first days our two heavily laden boat plowed through rather sluggish muddy wate but on the third day the banks became highe the water faster and by that evening we were @ the edge of the Kiham Hatas, Borneo’s longeg single rapid — 600 yards of water fury. The ensuing month was one continual ston of man’s battle with the elements. There wer days of hard paddling — days of roasting in the intense heat; sudden showers would soak yw through; then the slightest breeze would chill y to the bone; swarms of insects gave one littk rest. Rapids, waterfalls, narrows and whirlpook had to be encountered, where the slightest erro in judgment might spell destruction for all. We were too busy and tired to heed any m mours of unfriendly natives. At one village we were successful in capturing a Malay trader who had murdered a Dyak only the day before. That night the murderer was chained by the neck to a post in the center ofa shack. Our camp beds occupied the other space. The Malay was afraid to sleep on the floor be cause he thought the Dyaks might spear him from underneath. Personally, I could only think, “Gosh, what if they miss him?’’ That canvas spread on my bed felt awfully thin. I have passed more restful nights. But evidently the Dyaks were satisfied that we keep the prisoner, for nothing untoward occurred. Three days later we arrived at Toembang Topus, the last village on the Murung and prae- tically at the headwaters. The next day it was necessary for Captain DeQuant to make an overland journey to another isolated kampong. Little PMZ portable had been stepping out in good shape. We made set-ups every few days, or whenever conditions were favorable. KAICY was on the air every evening at six-thirty looking for my little warble, but the sked proved a littl early, and several times it was impossible to raise the Philippines until later in the evening. However, results were quite good since QSO’s were made from every installation. The trans mitting antenna generally consisted of about 100 feet of wire, anchored onto a handy palm tree, current fed with a quarter-wave “counterpoise.” A separate aerial was used for the receiver 80 that a break-in system was possible. After signing off we’d tune in some short-wave broadcast and let the group of curious natives listen to the white man’s magic. The stolid Dyaks would show little surprise on hearing the moaning of a saxophone or the melodies of an orchestra for the first time — mostly amusement and curiosity. To show them that the music was ate nt au: lay ret

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r, 19% Vas ne Othe ir boats Ty thing mM asp tropics n boats wate. higher Were longest il Story re Wet r in th oak yw chill ys e little ir]pook st error I] iny Tu pturing ik only er was er of | Space oor be ar him think, Canvas I have ly the tsoner, mbang 1 prac- it was ke an pong. out in Lys, oF AICY yoking a littl ble to ening. QSO’s trans ut 100 » tree, ose.’ ver 80 -wave atives stolid ig the of an ‘ment ic was AucusT, 1950 being picked from the air | would disconnect the antenna and then put it back, bringing in the signals again. But when I tried to explain that it only required a fraction of a second for the im- pulses to travel thousands of miles, they gave up and preferred to think that we were powerful beings who controlled kindly spirits to carry out our desires. Toy phonographs also went over big, but some one would invariably try to climb in- side the horn to see where that noise was coming from. I was often bothered by a crowd of natives gathering around the set-up and getting tangled in the wiring or knocking something out of ad- justment, So on one occasion I let one of the more troublesome boys feel the terminals of a Burgess PL 108-volt battery. He jumped back yelling “panas”’ (hot), and after that they were afraid to come within ten feet of the outlay. The QSO with KAICY on August 6th was fairly decent and we were able to clear consider- able traffic, so we left the outfit under guard and early the next morning Seelmann and I started our dash to the headwaters, while De Quant was away. No white man had heretofore penctrated this territory. With the four of us (counting two Dyaks) paddling steadily our light boat made god time. The water soon became so shallow that it to wade. hanging creepers impeded our progress, but by afternoon we had reached the actual uncharted headwaters. Here a small clearing was cut in the virgin jungle and a shrine erected to the Goddess of Fate who had safely guided us so far. A signed statement was sealed inside a gourd: our home- made PMZ flag bearing the A.R.R.L. emblem was raised, and an old battery and a radio tube were left on the raised platform. Several salutes were fired into the air. The Dyaks seemed deeply impressed by our solemn ritual. The return to Toembang Topus was managed y nightfall and we. had the following message rady: “Reached destination. Starting back tomorrow. Batteries getting low so expect next QSO from base station.”’ But as it happened the batteries were a little we had already obtained double the expected usage. To make matters worse, Manila vas in the throes of a typhoon and the message wever got off. The next day we were obliged to wart back, having given the dead batteries to the natives as souvenirs. After a week had elapsed with no word from MZ, the Manila papers came forth with the tories that we were lost, strayed, and even aten; and when these reports were reproduced a the American press considerable anxiety was aused. Luckily we reached our base just two lays later and notified all that we were safely turned, although slightly the worse for wear. PMZ took to the jungle on numerous occasions, ut to go into detail here might be boring. At one was necessary Logs and over- 100 low The ZL’ half OST 13 time our party arrived in a kampong to find the men armed to the teeth with knives, spears, and blow guns. The women and children were cower- ing in their huts, afraid to venture out of doors. Their report was that an enemy tribe of 200 warriors was hiding in the jungle preparing to iSSISTANT OPERATOR” TRICK AT THE KEY t makes an THE “ FIRST TAKES A The barbar accoutermer incongruous accompa- t for the white mar modern radio apparatus attack and massacre them all. One man had been shot at with a poison dart. However, nothing more happened while we were there, nor did we ever hear any more of these headhunters. What I believe to be a record for portable transmitters was established on the night of September 14th when Potter of W6AKW copied PMZ’s signals from a temporary set-up at Nonokliwon, two days away from the base camp. At the time of Potter’s reception 1 was working VS3AB near Singapore and using a 201-A tube with 300 volts on the plate. On another occasion with the same W3ZD transmitter PMZ was in direct two-way contact from the base camp with Colonel Clair Foster, W6HM, of Carmel, California. On the 14-me. band conditions were quite good for working Australia and New Zealand. s were raised several times when the portable was using an input of only two and a watts. The air line distance approaches 1000 miles.

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r on Queen Wilhelmina’s birthday the Governor of Borneo and the Com- n Chief of the Dutch Forces there made trip to Poeroek Tjahoe from Bandjer- uests of Captain DeQuant. They were terested in the progress of our expedi- vere out to our camp one evening for ter which they listened to some short- asting. They were quite surprised to ch small transmitting equipment WPLETE OUTFIT UNLOADED ON THE BEACH direct contact with America. When for the sked with “CF” of W6HM that we were entertaining the ‘‘roy- Colonel Foster very thoughtfully sent uge of greeting from the radio ama- erica which was greatly prized. The s quite a success. ater when Captain DeQuant was murdered only one hour from the * radio again came to the fore and iluable service for our party and Colonial Government. The quickest in which word of the tragedy could nt to the coast by boat and an ed would have been two weeks. In serious uprising the whole place en wiped out in the meantime. But eve at six o’clock PMZ gave the for the Dutch authorities in Band- KAILAF of Fort Mills, who immedi- | it to KAICY of Manila. Mathes cable office, so that the message estination on the very night of the cabled to KALAF, who shot them > us official government traffic was ing several months’ time and sus- | concerned, and possibly averting have developed into a serious up- ork was appreciated immensely and | Government has very sincerely the parties concerned. ime after conditions had returned to expedition activities were completed id good-by to its numerous friends was with a rather sad feeling that the little gas engine for the last OST Avueust, 1% time knowing that she would never again dist the ether of Central Dutch Borneo. In the June issue of QST a letter from T Seelmann was published expressing our intey appreciation of the hearty coéperation given og party by the members of the American Rady Relay League and I shall not attempt to ag more. Amateur radio, like many other finer things life, is not always duly appreciated in one daily routine. Not until you can stand off at tk far ends of the earth and view the codérdinate workings of every little cog is one likely to realiz fully what a wonderful and staunch machine i is, carrying us all forward into the realms ¢ science and adventure. Midwest Division Convention Topeka, Kansas, Sept. 6-7 (Kansas Section) LL aboard for Topeka, Kansas, where th Kaw Valley Radio Club is sponsoring th annual convention of this Division. Some thing new is being tried this year — the Conver tion will be held on Saturday and Sunday September 6th and 7th. The Chamber of Con- merce is the headquarters for the convention Registration will take place Saturday morning and the big official banquet is scheduled for earl afternoon Sunday. A.R.R.L. Headquarters have promised a representative, but as this announce ment is being written it is still undecided as t whom it shall be; it may be A. L. Budlong, Assist- ant Secretary or A. A. Hebert, Fieldman. We will have some good technical talks, plenty of good stunts, visits to interesting places anda general all around good time is planned for the delegates. We will do our best, but after all the success of the convention will depend on you attendance. Come! Please don’t forget to write to Frank K. Tif- fany, Secretary, Kaw Valley Radio Club, 919 King St., Topeka, Kans. Strays “KK ‘Be Strays “Ks The signal strength with the popular 4-tube receiver (described in November, 1928, QST7’, and in the Handbook) can be greatly increased, ac- cording to W9FPD, by substituting a tuned cir cuit for the antenna coupling resistor. W9FPD uses a 234” diameter coil of 5 turns of No. 18 wire, tuned by a 250-uufd. condenser, this com- bination covering both the 7000- and 14,000-ke. bands. Tuning is not critical, since the antenna is directly coupled. The size of the antenna will influence somewhat the amount of inductance and capacity required. trans crow’ obtal just const ¢ the 1 The prop: prac’ and also shar met! load in ot B and the tran no ! tran freq wis! rec on his its ap

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IST, 193 ain disty from T ur inten giv en oy ‘an Rag pt to ad ; things, in one off at th Ordinate to realix achine j realms @ ition here the ring the n. Some Conven- Sunday of Con- vention morning or earl) rs have nounce- d as t _ Assist- plenty S anda for the all the nh you K. Tif- b, 919 1-tube 7’, and cd, ac- “d cir- OF PD io. 18 com- )0-ke tenna a will tance AypgusT, 1930 OST Dummy Antennas By Guy C. Omer, Jr.* NE of the greatest problems now con- fronting the amateur is that of inter- ference. The Technical Development program has made possible stable transmitters; taking up but little space in our cowded spectrum, but a necessary feature in obtaining operating stability is the careful ad- justment of the transmitter under load, with constant monitoring. The load employed in about # cases out of 100, however, happens to be the most logical one, the regular antenna system. The interference caused thereby is of serious proportions. Moreover, the widely prevalent practice of warming up t he transmitter under load and of experimenting with different arrangements, dso with transmitter loaded, contribute their full share to the present day QRM. Although the method in general is highly commendable, the bad employed should be a non-radiating one in other words, a dummy antenna Besides effecting a great saving in the wear ad tear on the vocabulary of the fraternity, the dummy has other uses. As long as your transmitter doesn't radiate, you are bound by no regulations. So if you wish to see how your transmitter will behave at such and such a frequency without the amateur fold or if you wish to test out that ‘phone with a phonograph record — reach for your dummy! HOW A DUMMY ANTENNA WORKS All right, now let’s see what makes the wheels goaround. As far as the transmitter is concerned, the antenna system is nothing but a closed circuit containing reactance and resistance. When the antenna system is in resonance with the tank, the reactance is close to zero and the resistance is mainly ‘radiation.’ Now, if we replace the antenna system with a closed circuit containing very nearly the same values of reactance and resistance, the transmitter will continue to oscillate merrily on, all unsuspecting. No fellows, the idea is not new it's as old as radio. PRACTICAL TYPES W9EBF-W9FSC is a 15-watt station operating on a frequency of 3700 ke. using the 150-foot high KMMJ antenna at its fifth harmonic. At its fifth harmonic, this antenna has a resistance of approximately 275 ohms. The dummy used here is about the simplest possible, since the resistance also doubles as the inductance. This combination inductance-resistance is wound with about 60 feet of steel wire, which was used because it was * WOEBF-W9FSC, KMMJ, Clay Center, Neb handy. It is mechanically strong, has fairly high resistivity and fair permeability. The latter factor helps along the skin effect, thereby adding to the radio frequency resistance. One dime procured twice as much wire as was needed. L -s \ THE DUMMY ANTENNA MOUNTED ON THE WALL OF THE SHACK Tron wire yund on strips of wood furnishes the necessary The steel wire is wound on three soft-wood forms of a cross section measuring about 5/6” by 2”. Two of these forms are 20” long and have windings of 50 turns apiece and the third form is 9” in length and has a 20-turn winding. The amount of resistance cut into circuit is readily variable by a clip. The correct resistance was found by trial and error and these values will not fit your dummy. An old 250-uufd. variable condenser was dug out of the junk box and, with the resistance, was fastened to the wall behind the transmitter. The schematic of the dummy, what there is of it, is given in Fig. 1. When putting the dummy into service, it is first adjusted to duplicate the characteristics of

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the values of plate and antenna record them. Now, leave all other lone and substitute the dummy for . |. s (2209090000) DUMMY ANTENNA CIRCUIT t e-resistance, 50 tur t cC-Te stance / tur i , e-Tres té ¢ ( fur d enser U pe ntenna system. Tune the dummy to the tank and cut enough resistance that the same plate current flows and the same current flows through is flowed into the antenna. When 1djustment, better take steps to current meter ts may flow in the dummy before right amount of resistance cut into antenna because tetune the dummy, of course, after resistance since it also acts as an immy duplicates the regular an- r the frequency and any warming you wish to do may be done with for the ham in the next block. I transmitter to my dummy, but check of the antenna with the tank while rst ‘‘ka’’ because the dummy has resistance and it therefore has nance peak than the antenna. The ates the regular antenna only for se to the one tuned up to. At other r an exact duplication) retune the e should be readily variable since f an antenna system varies with The fundamental of the not have to resonate with the onies can be used just as easily. values of inductance and capacity nportant. If the fundamental of the inges the 1715- to 2000—ke. band (or lower) in all amateur bands, making a vstem teur who wants a better dummy, OST ntenna system. Tune up your trans- normal frequency under normal condi- Aveust, 19y the inductance, capacity, and resistance show separate. The resistance wire should \y wound non-inductively. A non-inductive windi may be made by doubling the wire and winding; on a form, taking care that the turns do no short. The field of one half of the wire cancels tlp field of the other half with’ this type of winding The tuning up of this type of dummy is simily to the method given previously but is mud simplified, since the dummy is brought in resonance with the tank and left alone while th resistance is varied until the correct value j arrived at. It would be best to check for res nance after this, however, because the resistane may have a slight effect on the tuned circuit. In stations using a feeder line to couple the antenna to the tank, the dummy would coupled best, directly to the tank. In some con. mercial installations, a feeder line is used t couple the dummy to the tank to more closely dv. plicate actual operating conditions, but this iss useless expenditure for the average amateur. The resistance may be wound with any wire— nichrome, iron, German silver, or anything o hand that will work. The resistance may be any size or shape — it only must be able to dissipate the power. It may be home-made or obtained ready made. Western Electric uses the Ohn- Spun resistors for dummies. In one of the R.C.A. dummies, a water cooled resistor is used and to determine the output of the transmitter, the rate of flow and the rise in temperature of the cooling water are measured! be MONITORING Monitoring is simple and _ straightforward. The regular monitor is used in the usual way except that it should pick up the signal from the Transmitter =! Plate -Tank, FIG CIRCUIT OF THE OUTPUT MONITOR Ly Monitor pick-up coil I intenna coupling inductance. VT Vonitor rectifier tube. 7 Output transformer. } Volume control. dummy and not from the tank. For average power, bringing the monitor into proximity with the dummy probably will prove sufficient. For lower power a closer coupling may be obtained by a single wire, one end in the neighborhood of the (Continued o 7 nm page ») Al ple An of tox tee ov oli pu dis pr su’ mi mi ev ml

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T, 193 € shou 10uld }y Winding inding } 3 do ne ncels th Winding S similgy is much rht int vhile the value is ‘OF res. sistance cuit. iple the ould be ne Com- used t sely duy- this is pur. wire hing on be any issipate btained » Ohnm- R.C.A. and to he rate cooling rward il way ym the [TOR erage - with For ed by f the Aveust, 1930 OST 17 The Third International Relay Competition By E. L. Battey, Assistant Communications Manager The been HOOPS!! Now it out! various committees which have working on the Third International Relay Competition have at last com- pleted their work and turned in their reports. And the reports surely are eye-openers! The task of checking over the logs fell to the lot of the Award Committee. Those certificates were too good to distribute carelessly, so the commit- tee labored carefully, spending many days going over the reports to see if all rules had been com- plied with, and that was some piece of work! It was a ticklish undertaking, too. When a fellow has put in a lot of time and worked hard, it is mighty disheartening to him to find, when the scores are presented, that he has not as large a total as he submitted. Some of the participants will not recognize their scores. Some are greater than sub- mitted; some are smaller, due to infraction and misapprehension of the rules, but a contest is not a contest unless rules are enforced, and we ask comes every one to bear with the verdicts of the Com- mittee. We won't bore you with a review of the rules here. Just dig out your December (1929 issue of QS7' wherein all requirements are stipu- lated, and note the many points that had to be considered in ‘‘checking and double checking.” We know that every one wants to know who None other than WIASF, the ‘‘old reliable’”’ of international tests. He has a total of 2925. Not a bit bad for a one-man station! ‘‘ Windy,” WSGZ, gave the gang a fast race to the tune of 2435! W6AAZ ran up to 2180. The sixth and seventh high are W4FT and W2FP with 1600 and 1495 respectively! Seven is a lucky number so we will stop there and list below the twenty-five highest scoring stations in the United States and Canada. rHE TWENTY-FIVE HIGH STATIONS W6BAX, 3210; W4FT, 1600; WO9DEF, 1420; WSDJV, 1140; WILAZE, 1065; W2CXL, 2945; W2FP, 1495; W7BE, 1368; WSAXA, 1112; WI1SZ, 1060; WIASF, 2925; W9UM, 1476; W7MO, 1308; W3DH, 1104; W6BSN, 976; WSGZ, 2435; W9ECZ, 1440; W6BZD, 1260; W6EPZ, 1092; WSCCW, 915; W6AAZ, 2180; WI1CMX, 1430; W9YC, 1236; W9DGZ, 106s; VE2CA, 856. There are some mighty impressive scores in that list! It is particularly interesting to note that the high stations are well distributed throughout the country. This leads us to believe that the system of weighted credits, which was tested out in this contest, is somewhere near what we are looking for. But after all this was not a contest between stations throughout the entire kK \ Pa a \F FAMILY ON.4 > Ae You HAPPEN TO BELONG To THIS INseclT STEER CLEAR OF IKE GIG FELLOW FROM NOw - country. It was, rather, a competition between the stations in each A.R.R.L. section of the United States and Can- ada, and between the stations in each foreign ‘country and outlying district where the intermediates “W’”’ and “VE” are not used. A station on the east coast was not trying to out-do one on the west coast but was trying to defeat all other stations in its partic- ular A.R.R.L. section. Certificates will go to the leading foreign-contact sta- tion in each section and to the highest scoring station in each foreign locality. A complete list of final scores is given at the close of this article. Now, what about the foreign par- won and who has the largest score, so we won't keep you guessing any longer. Here goes — it’s probably a case of ‘‘he who lost the most sleep ran up the highest score.’’ W6BAX heads the list with a total of 3210 points made by work with five continents. What a score! W2CXL comes next with 2945, having worked 83 stations in five continents. Incidentally, no station succeeded in working the six continents. And who is third? ticipants’ scores? CMSUF not only leads the stations outside of the United States and Canada, but also has a score higher than any United States or Canadian station! The score is 3564!! Zowie! CMSUF exchanged mes- sages with 98 stations in the nine United States districts and with 4 stations in three Cana- dian government inspection districts. HC1IFG would have beaten CMSUF's record had VE9AL another district, but Canadian counted as

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~ ( 11 VIASI ropean and South American signals very poorly. Australian and New uunt for the district in which d. In VE9AL’s case this is the in district. As it is, however, is a humdinger — 3510 —a n owner should feel proud of. ted more districts than any other ited States and 4 Canadian. A Rican comes third K4KD ts! A total of 3278 gives X9A L2AC has 2981, and here is G5SBY wonder what would happen if found with the leaders? There are intries represented in the list of ne the United States-Canada REU SEATED PYiIAW iT HIS STATION on, let's see what we can find in ters received from participants. remost cry is, ‘‘I had a whale of a ts. When are the next ones?” or Let us consider the United comments by districts found 14 me. to be the best ffect inadian ts were plentiful. WIAFD says, high powered stations came many foreigners who the tests. Second dis- reported the off-frequency ‘““W” revalent than in the tests two ibout that later! Third district: er of “‘W”’ stations answering his ge" calls, W3Al1Y was led to be- nited States hams have recently Hi. W3ATJ tions which ordinarily use d.c. He started to list urd out-of-band, but had to give no time to operate. Fourth dis- pears to be the easiest continent strict. Fifth district: W5WW had . power leak, R5-6 in strength, nstantly from February 22nd to Y found about foreign countries. iring the tests OST AvuGusT, 1930 28th. Sixth district: W6BAX contacted all con. tinents except Africa on the first day of the tests, European signals were very weak. W6CUH re. ports 7000 ke. was FB and 14,000 ke. very poor, W6CTP had a good time with one Type 124A, W6BYH blew a couple of fifties during the ex- citement. Seventh district: W7DP lost several good foreign QSOs due to broad a.c. signals of United States stations. He says that weather conditions were not the best: 14 me. was ab- solutely N.G. after 7:30 p.m. W7ACD, the only Idaho station submitting a score, used a single Type ‘10. W7AHX found a scarcity of foreigners on 7 me. Eighth district: WSBYN says, “Bad weather and QRM.”” WSDED did not hear as many foreigners as in the previous tests. Ninth district: W9AUH bewails the number of stations using raw a.c. on 14,000 ke. W9AJA has some interesting comments, which we quote: “On the two week-ends that the station was on the air for European and African contacts, perhaps the out- standing feature was the absence of signals from those localities, and the terrific QRM from the east A significant proof of the fact that foreign stations rarely answer American CQs is shown in the list of QSOs from this station during the tests, as every station that was worked from here was raised by first listening and finding the foreign station. More intelligent use of the receiver and less use of the transmitter will result in more foreign cards on the station wall.” Canadian second district: VE2CA and VE2AC report conditions very poor during the contest. Europeans were almost entirely absent. Only five South Americans and no Asian and African stations were heard. Australian stations were numerous but weak. QRN was very bad. They also mention the raw a.c. notes on 14,000 ke. VE2AC says, “‘l appreciated the general patience coast. HAFS8B and good humor of my foreign QSO parties in answering my numerous ¢alls for repetitions and fill-ins. These fellows were real sports.’’ Canadian fifth district: Northern lights bothered VE5AW. The first six days of the tests he did not hear a signal. Now let us look over the comments from for- els tré ha fri di ty th tes we of let the th: sas St: sec un dit all sin evi

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1930 | con- tests, H re. poor, "12A, ie eX. veral als of ather S ab- only single gners ‘Bad ar as Ninth tions some n the ir for » out- from 1 the fact rican ation irked \ding se of - will all.” 2AC ‘test. nly rican were They ) ke. ence A. Ft o \ s in and lian LW. ira AueusT, 1930 eign participants. Activity was highest in Aus- tralia and New Zealand. From ZL2AC: ‘We all had a very enjoyable time and met many an old friend during the course of these tests.” ZLIFC did some fine work with 50 watts input to four type ‘O1As in push-pull. VK4DO says QRM was the worst factor to contend with during the tests, and that during the first week ‘‘W”’ stations were not at all strong. VK3JK says, ‘‘ The lesson of these tests is that a pure d.c., steady note will let a lot more of us work together in the band at Several participants complained that many ‘‘W”’ stations did not have test mes- sages. According to VK2NS8, the best United States signals came from W2CXL, with WSGZ second best. The 14-me. band was found rather unsatisfactory by the VK and ZL stations. Con- ditions in Great Britain were very poor all during the contest. G5SBY says this was especially true on 7 me. G6LK was any “W”’ stations on 14 me. because of adverse condi- tions. G2GM states that only the high- powered stations came through with any consistency. CT2AA found it ex- tremely difficult to get reply messages off. ON4BC found DX conditions good. HAFSB was troubled by very strong, broadly tuned western Europe stations, and by QRN. HAFSC tells us that United States came through very well but stations in Hungary had a hard time reaching America. OZ7Y says that February is a bad month for Denmark-United States contact, and that consequently he was unable to ex- change many messages. South American par- ticipants didn't give us any dope on conditions there, but we should judge from scores that they were quite favorable. Conditions in China, except for QRM, were very good. VS6AH says, ‘‘ The ‘W’ stations came in at good strength, the re- ports given by this station averaging R7, QSA5. Crystal control stations, even when R3 or less, ‘scored all along the line’ for ease of message exchange.” We should like to go on now and list the scores, but there is something else we must consider first, something which will probably leave a bitter taste in the mouth of some participants. We are speaking of the report of the Irregularities Com- mittee. After all that has been said in QS7' during the past year, after all the advice and warnings that have been given, there is very little excuse, if any, for off-frequency operation. And yet, 42 participants in the tests were logged out-of- bounds! Sufficient evidence was presented to the Committee to disqualify fourteen of this number!! While each case of off-frequency operation was considered separately and on its own merits, a single observer's word never constituted sufficient evidence to warrant disqualification. The one the same time.” unable to contact signals OST 19 exception to this rule was in the case of observa- tions made by a member of the headquarters staff. Inasmuch as the unquestionable accuracy of his reports was known, a single off-frequency report made by him meant “disqualification.” W5ANA, W6CNX, WSDED, W9AZY, W9BEU and VE5AW would have each received the certifi- cate for their section had they been more careful in staying within the amateur channels. The other stations disqualified for off-frequency operation, although having scores too low to receive cer- tificeates, are: W2AYJ, W2UK, W2AEY, W5AQY, W6EAK, W6DPJ, W7EK and K4AAN. There are several other irregularities to consider in addition to the off-frequency cases. One amateur was disqualified on two counts — not only was he working outside the bands, but ONE OF THE PIONEER MEXICAN STATIONS he also was using another man’s call while waiting renewal of his license! Definite closing dates were set in the rules for the receipt of reports. Six reports, from W2CUQ, W3AAZ, W6BUX, W9BQE, KAICE and VK3RJ, were received late and in accordance with the rules were re- turned to the senders, automatically canceling their entries. WGAKW, W9DKK and W9DQN cannot be given scores as they did not present all the information required in the rules. WOAME can be given no credit as his messages were han- dled after 7 p.m. E.S.T. on February 28th. A number of stations, while not actually taking part in the contest, submitted logs so that participants would get credit. We are listing their scores with the rest, marking them with an asterisk to set them apart from those that are actually entered. W6CSJ and W7AAR would be in this group had they not been caught off-frequency . Several members of the HQs staff entered the tests. W1SZ would take the certificate for Con- necticut, if HQs men were eligible for prizes. Just a few facts and then on to the score sheet: Of 160 United States and Canadian stations whose scores are given below, 57 worked on 14 32 hammered away on 7 mc., and the re- divided their time on those two mc., maining 71

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me. was the popular band in Throughout it seems to be more or less of a n 7 and 14 mce., with, perhaps, a New Zealand. toward 14 me. Of the 17 succeeded in contacting five 14 worked four continents; 42 worked ked two; and 21 worked one con- he leading stations so far as number concerned are W2CXL ind Canada, and CMSUF in the W2CXL exchanged messages with | CMSUF with 102. SCORES 1ONAL Revtay COMPETITION ns reporting but not entered Wiw\ 2025 WIABG 1430 WI1VS 1065 WIKH S32 WIIA i) WIMP 3 WITL W W W W W Ww W W W W W W Ww 1AJD LACH T1ISZ IBHM 1D! Rhode Isla IBII W. Massachusett IZA 1ZB Vew Hampshire 1AFD IBFT 1cOow* IBAD \ Vew Jersey 2CXI1 2FP 2Al 2A0G 2ADP 2IC 1060 117 12 2045 1495 20-4 AUGUST, 1930 W2AVO 90 W2CJX 70 W2FL 66 W2BPY 30 W2AAW 6 W2BUY* 6 W2AEB 3 ¥. ¥. C4. 3 W2KJ 416 W2HJ 368 W2ALW 180 W2AJP 135 W2AQG 72 W2BO 4 W2BDA A W2BCB 9 E. New Yor W2RD 405 W2BYS 252 W2BAIl sl W3CC* 5 W2AKD* 3 W2BYP*. 6 So. New Jersey W3DH 1104 W3ACX 292 We Wt Wt Wi wi Wi Wé Wé W6 V6 W6 Wa Wa

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1930 70 r hb w) 1104 292 ALU AUGUST, Ww3ATJ w3Pl W3ADH W3H\ w3Chk De W3AJ UV W3AJH W3 Ww3M¢ W3Al¥ W3MZ W3AHR W4k'l wan W4Ly wiwl w4iTs 1] W4AAQ ] W4LX W4ABR W4PJ W4ABH W4AJH Wiss Fl Wis\ \ W5sww ‘) WSZAV W5MS WS5TD Ne W5TV* Santa ¢ W6BAX W6AAZ W6BYH oa W6BZD W6EPZ W6CTP acran W6BSN W6CIS W6DGQ* 1930 San Fra W6DPI Los Ar V6CUH W6DC\ W6AM W6BGC W6DEP* 120 Ls Is Li SI 1S LOO ri. 105 HMw) iH 105 210 YTS Lob 576 w6ecXw* W6ETJ* W6DWI W7BI W7MO0O W7AC W7AHX W7P\ W7DP W7NR W7ACY W7NM W7ACD WS8GZ WSDJ\N WSBKP WSCFW WSBYN WSDGP WSDDK WSKC WSNP WSEZ Wi. Ne WSAXA WSADG WSDMI WSDUB Wscvd WABAI Ww. Pe Wwsccw WSAJN WSO! WSPR WSCRA WSDLG Vici WSDYK WSBN'1I WSCED uN t \ WSDPO W9UM W9EI W9AJA W9EXW W9EMR W9ECZ W9DGZ W9CPH W9CF Ww9DCK W9FDI W9AVP. W9FMR W9DWA* Kans W9DEF W9GDJ W9BPL 1440 LOOS SO4 536 312 129 9 a) Ss 1420 105 So. M wore W9DMA Ke W9ELI W9AUH WOCIS V WO9BMI I WY9AZZ \ VM WwoCTW Vo. D WoDGs NW W9ASI Va VEIBI FA ZC A ZAC ‘) E3BK VESDA { VE4AGD FOREIGN f CMSUI I HCIFG HCL HCIDR P } K4AKD K4AK\ iF | X9A Vew Z ZL2ZAC ZLIFC ZL2ZBG ZL2GQ ZL3BI ZLIAP i GSBY G5MI G2GM G5YG GOGS G6RB G5BD G6LK J NJ2PA Br PY1IAW 171 Sl Sob 120 10 oO O10 +3000) (4 L078 st Ow 12 10 l l 1575 1494 Continued ¢ PY2IG PY2AZ Vewfou land VOSM¢ VOSAW K7CH KS5WR K3HI K2NS5 K3JK K3ES8 K2H1I KS5IT KS5GR K3HK K5HG K3BQ K4DO K3BW K6SA K7WI K2RX K3LS K3PR K3CX K2HK K3WI K3AX SHH HHH LPL COC CCC CCC OCC CCC ECO F é FSFEM, ex-OK-1FM FSKZ FSAXQ OA4J.... K6ALM K6EVW K6ACW KOBHL KO6ERH CT2AA VS6AH ACIBD ACITS ZS2N ZS4E ZU6W ZU1D ZS4A CXIFB HAFSB HAF3C CE7AA page 80) 1424 135 1320 1305 1254 1080 1060 1060 690 657 630 600 504 1S0 392 204 240 138 Qo 3Y 33 21 1s 10 116 SU 1160 O40 530 100 1i4 +) 100 1S

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ether, have them pipe down, get ther, look me in the eye, and I'll t's never been told. Kitty, make eward and close aboard my aim it A.R.R.L. Headquarters, over desk, in a glass-covered case, of Tuska, lies the Wouff-Hong. It iVND SACRED WOUFF-HIONG R.L. Headquarter by order of the Secretary guards it with his l where, wonderful instrument of torture. worn smooth from years and years ham in radio, old or young, stands nee the beginning of amateur radio The one or the other” either or the Wouff-Hong, take your squint at the illustration. at the United States Naval napolis, Maryland, in the his- since the early days of a pre- ings a blue silk flag. On it appear, olive branch, a fearful and won- of torture and an inscription. the illustration of this historic | the inscription. It says those he one or the other.”’ ro there lived some especially kinned whops on the southerly terranean. They used to make pping every merchantman that ting a wad of gold or capturing ing the crew and passengers into known as the Barbary iries they worked this graft. were ys of our country there was a val officer named Stephen De- double-fisted double-distilled in those days was mostly AvuGust, 1930 hellions, whether ashore or afloat, having just finished off the British Navy in the unpleasant- ness of 1812. It was Stephen Decatur who put into immortal words the thought that appeals to every properly-built male American. Looking up at the Stars and Stripes he said, ‘My Country may she ever be right, but right or wrong, my country!”’ It’s that kind of stuff they put into a man at the Naval Academy and it's the same stuff that has made these United States of Amer- ica what we are to-day. Stephen Decatur came from the U. 8S. Naval Academy and he had soaked up a lot of it. Well, after some American ships and American citizens had been seized by the Barbary Pirates, the Navy Department assigned a squadron to Decatur and told him to go the limit. Decatur shoved off and decided to go to the mat on the matter at once. He picked up a couple Courtesy U. S. Naval Academy FLAG FLOWN A CENTURY AGO BY COMMODORE STEPHEN DECATUR Whatever the nature of the a sl implement, the intent of th flag clear: a choice between good behavior and sudden death For the formation of the curiou i seen probable that the gadget a garrote, a gentle trument used for twistin rope around the tim’s neck and au ’ trangulation. Careful tion of the Wouff-Hong shows that it would lend itself terprise, and that 1 ins per admirably to such an er probably a aoed a method as any of applying its beneficial properties to mge doers in — kp rmateur radio, Frinstance, off-frequency operation of pirates off Algeria, shot up the whole works, killed the admiral of the Algerian navy, took Continued on page St | the eff

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1930 HicK y just asant- Oo put als to ng up untry g, my into a same A mer- came had prican ed by tment im to o the ouple lemy ORE orks, took AveustT, 1930 OST The Operating Characteristics of Vacuum Tube Detectors A Graphical Study of Grid and Plate Detection for Triode and Screen-Grid Tubes In Two Parts—Part I By H. A. Robinson, W3LW* | ely practical article that i » published in QST. The graphical data it tatee « Pp f detection to meet almost ar y requireme ; This first part of the article covers grid ar 1 plate detection ¢ 1 part hich will appear in the September i f QST i ends th a graphical comparison of the two types of tu n ul computation ll complete Part IIT. However ary for the complete understanding of the main part Lh r perform than anything we have pre- Pp t I ligent cho of the type of detector tube r fio th the three-element tube. The } h th Lm ; ratior for the creen-grid tube h grid and plate detection. An appendix of mathe- ? l f ma l beyo imple arithmetic is le EDITOR T is the purpose of this paper to present to the average amateur radio operator, in terms which are within his grasp, the general fundamental principles underlying the operation of vacuum tube detectors. The effects of varving detector characteristics and DOVYNAMIC CHARACTERISTIC 7 i K > YQ & 2 ) x y q x 8 S & ~) LI! lo EH GRID VOLTAGE Csig Le Cs eugieien SIGNAL FIG. 1—A TYPICAL DYNAMIC DETECTOR CHARACTERISTI¢ Tt pr ts the relation between grid current and grid voltage for grid detectior or the relat , vetween grid or plate tage P t for plate detect circuit constants are considered and presented in graphical form for both triodes and screen-grid Willow Gr ve, Pa * Silver Lake Farm, detector tubes, Type ’27 and Type ’24 being specific examples of these two classes of tubes. It is hoped that a better understanding of the opt rating characteristics of detectors, together with a knowledge of the desirable circuit con- stants, will enable amateurs to secure improved performance from this all-important element of the receiving equipment. Generally, in radio reception it is the function of the detector in some way to transform the impressed radio-frequency signal into an electrical . + . ° — > FUN a ; 4 S$ e«rses# “ FIG -TYPICAL CURVES SHOWING THE VA- RIATION OF THE D.C. PLATE CURRENT INCRE- MENT WITH THE AMPLITUDE OF THE SIGNAL Curre A plotted on logarithmic scale ind shows that letector output , rs the quare of the 7 ul rltage impulse varying at an audio frequency. Vacuum tubes as usually employed depend upon the non- linear relation between their inter-electrode currents and voltages for their detecting per- formance. This relation is shown by the diagram of Fig. 1. Here a typical dynamic characteristic is shown. This curve may represent the relation between grid current and grid voltage from

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OST AuGusT, 1930 ection is obtained; or it may be the current with grid or plate ponding to plate detection. The dynamic characteristic from a ist at certain parts, satisfies the AWW N AAA 1LENT CIRCUIT O}F 1CUUM TUBE non-linearity necessary *, for example, the operation of plate detector, the principles of grid Then the dynamic 1 will be the so-called mu- , showing the relation between nd plate current. Remembering our letector requirement of non-linear- rent and voltage, let us choose an t in the region of greatest curvature a given tube, the general shape of mutual characteristic will be similar of Fig. 1, although this is dependent late voltage and plate circuit load is fixed for a given ponent of the fundamental frequeney of the impressed signal and components of | higher harmonic frequencies. Only the fundamental component and the d.c. component are shown ip the diagram at the extreme right. Thus, if the signal impressed on the grid is one of radio fre. quency, the resulting plate current will have radio-frequency component which will not affeet the headphones or audio amplifier, but is usually by-passed around them. However, the d.c. component AJ will energize the headphones resulting in a dull plop similar to a key thump when the impressed signal is interrupted. This d.c. increment of plate current (AJ) which adds to the steady d.c. plate current 7, when a signal is impressed, can be read on a d.c. meter in the detector plate circuit, providing the impressed signal is of sufficient amplitude. The curves of Fig. 2 show the variation of this d.c. plate current increment AJ with the ampli- tude of the impressed r.f. grid voltage. These measurements were made using a Type ’27 asa plate detector at 1500 ke. The steady d.c. plate current J, of 2.71 ma. was balanced out and only the plate current increment A/, due to the im- pressed signal, read on the plate milliammeter. The mathematical analysis' of the detector action, for small signal voltages, shows the detector output to vary as the square of the impressed voltage (neglecting distortion terms). To check this conclusion, the d.c. plate current increment AJ and the impressed r.f. voltages were plotted on logarithmic scales resulting in Curve A of Fig. 2. This is a straight line, the slope of which is 2.1, thus Audio reg Amel giving an experimental check on the and square law detection factor. Curve B 7 . i Woumeter) hows the same current-voltage relation XY PERIMENTAL WHICH THE MEASUREMENTS WERE en screen-grid voltage as een-grid detector) by the grid bias voltage. For any given a corresponding d.c. in the diagram. impressed signal reaches the varies around depending on the character of the diagram, and by projection current variation is obtain: d departs considerably iperimposed on the steady d.c. mathematical (see appendix analysis this plate own to be composed of a direct A/ in the diagram plotted with uniform scales. It should be noted at this point that in the usual detector application, it is not this d.c. plate current merement which produces the useful output sig- nal. However, the audio-frequency plate current variation produced by modulated or heterodyne reception, results from this curvature of the dynamic characteristic in a similar though more complex way.! In the case where our operating point is not at a region of considerable curvature on the dynamic characteristic, as at “O” in Fig. 1, the plate current variation is identical with or approaches the grid voltage swing in wave shape. Thus the output is of the same frequency as the input and we have straight amplifice r action (e’ and of Fig. 1 In the case of a grid detector, the curv of Fig. 1 would be the dynamic grid characteristic showing the re lation between grid eurrent and grid voltage. For this type of detector the oper- ating point “©” is determined largely by the See appendix following Part II

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1930 f the higher nental WH in if the 10 fre. lave @ affect sually d.c »’hones hump . This 1 adds signal in the ressed f this mpli- These i asa plate | only ¢ im- neter, tector s the of the rms). irrent Itages ng in ‘aight thus n the ve B lation that it is ment t sig- irrent nlyne the more ot at lamic plate aches s the t and and ve of ristic and pper- the Auacust, 1930 pot ntial of the grid return to the filament and the resistance of the grid leak. The detection principle is exactly the same. Here the audio- frequency components of grid current, produced by the curvature of the grid characteristic when : modulated or heterodyned variations of the grid recen ing signals, cause audio-frequency Lf aoe A PLATE DETECTION FIG y) (1 ( Cond f R trred leat C2 WO-upfd. plate by- Z— Plate load impedance pass condenser, RFC — Radio frequency choke C3- used why- T— Type '27 tube Pp » potential which affect the plate current through pure amplifier action. Thus the detector per- formance depends on the curvature of the dy- namic grid characteristic at the operating point. Usually, for small signal voltages this grid char- acteristic curvature is more pronounced than the curvature of the plate characteristic, resulting in greater sensitivity for grid detection. However, this cannot be taken too rigorously, since other 3e TYPE ‘27 ] ~T T PLATE DETECTION | factors which we will now consider also affect the detector pertormance. It will be noted from the diagram of Fig. 1 that the effective curvature of the dynamic char- acteristic throughout th region of grid voltage variation (a-a of Fig. 1) depends on the magni- tude of the impressed signal voltage. Thus th: operating point for maximum detector perform- anee mav be considerably different for low signal OST 25 levels than for relatively high signal levels. It is usually this factor that limits the use of grid detection to relatively low signal inputs whereas plate detection is usually employed for detection at signal inputs greater than two volts — so- called “power detection.” The consideration of distortion becomes of prime importance in the case of the reception of voice-modulated signals and may determine the choice between grid and plate detection. It would perhaps be well to note here that the terms grid and plate detection, as applied to vacuum tube detectors and as used throughout this paper, refer to the detector action resulting from the curvature of the grid or plate character- istic respectively. In the case of grid detection, detector action also may occur in the plate circuit a condition which usually is undesirable and j | TYPE ‘27 | | PLATE DETECTION | CURVE GRID BIAS ¥ © 2»———__4 : ' -~47 | 3 2 -9.0 3 -14.0 | 4 4 -205 o1}—_4$ i Eg= i72v 7 C, = ood 1] Re = 3 Meg } | Z= 6000 al a FIG 7 ) ' 2 3 4 s . 7 RF INPUT -VOLTS which will not be considered here because of its complexity. The diagram of Fig. circuit of a triode, or three-element vacuum tube. Hlere the inter-electrode capacities are shown as well as the internal grid and plate impedances of the tube (r, and r,). Z; is the external plate load impedance. In the case of plate detection, the grid is usually negatively biased to get down to the regions of curvature of the dynamic mutual char- curve and hence the grid does not draw lhe internal grid impedance (r,) is then very high, a condition which results in greater selectivity in the tuned circuit across which the 3 shows the equivalent greatest acteristl current. detector is connected. In a circuit arrangement in which a tuned input circuit is also the coupling impedatr of radio-frequency amplifier, an in amplifier gain usually results when using plate detection. However, this increase was -for a screen-grid INncTCast slight but five per cent

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r giving a voltage gain per stage before, the curvature of the iracteristic is affected by the | the external plate load im- influencing the detector per- plate circuit of Fig. 3 it is the equivalent acting ind filament, resulting from d on the grid, reduces to the generator of internal | to the tube plate impedance, external load impedance Z;. im detector power output (but T distorted power output the holds: The external plate load resistance equal to the tube However, as usually employed, swings the grid of a succeed- tube and the detector out put xternal load impedance is the voltage ofa

cveave

E 2 PLATE DETECTION ' TuSE WNo.! 2 TUBE Ne2 Eg= '72¥ Ec = -14v = C= Oost Rg = 3 eg Z= 80004 FIG 4 n A 3 5 © 7 QE INPUT <-VOLTS tion. It ean be shown readily im output voltage across the | plate impedance of the tube cligible in comparison with the Hence the detector ls on the values of external d internal plate impedance. mpedance.

aI Po « i) 2 4 te 20 ORO BAS ~ VOLTS M internal plate impedance of the tu tion of the plate and grid (and scr tages, and all these factors enter OST

AuGustT, 1930 into the consideration of detection by means of vacuum tubes. To demonstrate experimentally the variation of vacuum tube detector performance with the — T C Audio " 1a Mod RF Input Re VYVV

Lage B GRID DETECTION FIG. 5 CONSTANTS SAME AS FIG. 5A tube parameters and circuit relations as considered extensive measurements The experimental set-up em- ployed in this study of detector operating char- acteristics is shown by the block diagram of Fig. 4. A General Radio signal generator Type 203-B supplied the modulated radio-frequency signal of a known percentage modulation and of a known and conveniently adjustable voltage. A grid radio-frequency amplifier stage of known voltage gain inserted the signal generator and the input to the detector whose characteristics measured. The de- tector audio output (having the original modulat- ing frequency) was magnified by an audio-fre- quency amplifier of known gain. The amplifier’s output was measured by a vacuum tube volt- meter of the thermo-couple type. above, an series of were made. screen- was between were being

RE ine Two representative types of vacuum tubes were employed and their characteristics measured as both grid and plate detectors. The Type ’27 tube was selected as the typical triode detector be- cause of its increasing use in receivers employing alternating current for filament heating. The rugged element structure of this type tube and general operating characteristics recommend it for use as a detector, as well as an amplifier, for applications requiring a three-element tube. The

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1930 ns of ation ! the a lered ents em- ‘har- Fig. 13-B gnal own cen- own gnal hose de- ilat- -fre- ier's olt- — Ee ere ube be- ing rhe ind for The Aveust, 1930 operating characteristics and dete etor yp rformance eurves Which follow apply in principle to other types of standard three-element tubes, such as the Type O1-A, ’12-A, et The popular Type °24 tube was taken as the , With some modifications. typical screen-grid detector because of its excel- lent ope rating characteristics and increasing use - , , , : > S 2 3 & F INPUT - VOLTS as a detector as well as a radio- and audio-fre- quency amplifier. Tubes having average ee constants for tubes of their type were selected and several tubes were employed to check the performance. The greatest performance variation between tubes occurs (as would be expected) for tubes operating as grid detectors, since the grid characteristics of tubes of a given class are subject to considerable varia- ton more so than the plate characteristics. All of the following measurements were mad at a carrier frequency of 1500 ke. A 400-cycl modulation frequency was employed with thirty per cent modulation of the output carrier except where measurements were made to determine the effect on the detector output of changing th percentage modulation. Although these condi- tions are not identical with those encountered in amateur ¢.w. reception, the detector perfor mance ls quite similar. The measurements made by the author are for detectors without regeneration. Regeneration in the detector circuit will increase the over-all gain by increasing the ratio of alternating grid voltage to signal voltage, particularly at small values of signal voltage. The gain of the detector tube OST TRIODE PLATE DETECTOR We will consider first the Type ’27 as a plate detector. The schematic diagram is given by A of Fig. 5. In this and the following schematic diagrams the circuit constants not listed were changed during the measurements and the detector operating characteristics determined for different values. Each performance curve indi- cates the operating voltages and circuit con- stants under which the measurements were made. Detector gain is a convenient figure for com- paring detector performance. It is simply the ratio of the audio-frequency output voltage of the detector to the radio-frequency input voltage to the detector. It should be noted that this gain 30-—---- -1- 7 _ * | ‘ee ane |_| | | | 25-— wll + ~_+ -— —+ a 1 | | | ! | | | 2 ,op |_| | ents » | | } | 3 | i | | | : \ = | | 7 | = a ; | TYPE 27 : } | | GRID DETECTION | | CuRVE GRID CONDENSER i 1.O0-———++ i—4 1 esa 6taceeu Sanememendl $ | 2 160 wate Re = 6 Meg | | 3 300 pa td z 80004 | i= es a _FIG. 13 i | | | | | | ty) ae i ° ‘ 3 4 RF inPUuUT-VOLTS factor is directly proportional to the percentage modulation. This should be remembered when referring to the performance curves which follow. The series of curves of Fig. 6 show the variation of audio output voltage (across an audio trans- former primary used as the detector coupling impedance) with variation of radio-frequency in- put voltage. The effect of changing the operating point as a result of shifting the negative grid bias is clearly evident in the detector performance. The related series of curves of Fig. 7 shows the variation of detector gain with r-.f. input for several values of negative grid bias. The maxi- mum detector gain obtained for the particular value of plate load impedance employed in these measurements occurs with an r.f. input of three volts r.m.s. and with a negative grid bias of 20.5 volts. These values depend on the plate voltage and plate load impedance as well. It is evident from these results that the Type ’27 as a plate detector requires a rather high r.f. signal voltage level for favorable operation. A radio-frequency input voltage level of two or three volts would have seemed impractical at these frequencies before the advent of the screen-grid radio-fre- quency amplifier with its high voltage gain per stage, but such detector signal levels are fre- itself, however, should be approximately the same with and without regeneration. For information on the effect of regeneration on the received signal strength see the paper of that title, by Balth. van der Pohl, Proc. 1. R. E., Aug., 1928. EDITOR

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| in modern broadcast receivers wer detection.” s of Fig. 7 it will be noticed that ector gain is obtained with dif- ges, corresponding to different on the dynamic characteristic, signal input. Fig. 8 serve to compare the per- eristic of two different Type ’27 curves of Figs. 7 and 8 it is he detector gain reaches a maxi- in input signal level (depending teristics, electrode voltages and and then with increasing signal tor gain decreases. The impor- the proper detector operating level at which one for maximum detector gain the signal Fig. 9 show the variation of de- th negative grid bias for several t voltage levels. These curves serve tive data on the performance of a detector but are by no means DE GRID DETECTOR ce of this type of triode as a of greater interest to amateurs losely related to amateur applica- hematic diagram of this detector given by B of Fig. 5. It will be grid returns directly to the cathode ugh the leak, R,. curves of Fig. 10 show the varia- gain with r.f. input for several voltage, and the corresponding of Fig. 11 show the audio output ion under the same conditions. tor gain reaches a decided maxi- ise of plate detection; however, ted that this peak gain is con- than that previously obtained t a signal voltage level of 0.5 volts rrid detector of this type. The in- tor gain with increased plate OST voltage is also well demonstrated, although further increase over the values employed is not justified from the standpoint of either tube life or performance. The curves of Fig. 12 show the effect on the de. tector gain of changing the value of grid leak re. sistance. The improved performance at the lower signal voltage inputs obtained with higher grid leak values is apparent, but the differences ar rather slight. Curve 2-A shows the typical output voltage variation for these conditions. The effect of the capacity of the grid condenser is clearly illustrated by the detector performance curves of Fig. 13. Here the audio output voltage variation with r.f. input is plotted and the in- AuGust, 1930 ———————— RF ine creased output with smaller grid condenser capac- ity is evident, though the effect is not great for grid condensers ranging from 100 yufd. to 300 pufd. \t higher modulation frequencies (above 100 cycles) even better performance is obtained with the smaller grid condensers. “ TYPE GRID OE 27 TECTION E. 4'sv © 100 pp? Re* 6 Meg Bo00 “4 al rie ; . 7 > ee =) = | 4 > ee T ' a — = Ld -1} [ >; ry r RF inPuT- VOLTS Fig. 14 shows the variation of audio output voltage with detector plate voltage for several input signal voltages. It is evident that for the low signal inputs volt of the order of a quarter there is little improvement in detector gain with increased plate voltage, but that at higher input signal levels the audio output in- creases with voltage. considerably increase in plate The curves of Fig. 15 compare the performance (Continued on page 82) til tic th lie me co sy an th co be an all th Ine Ins Fre Sul

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, 1930 ugh a | is hot ? life or the de. eak re. * lower T grid "eS art Dutput denser mance oltage he in- at for » OU ibove aint d it put veral - the arter pctor it at t in- plate ance AuaustT, 1930 OST Naval Reserve Cooperates With Red Cross Instructions Drafted for Emergency Communication in Disasters PLAN has been worked out between the Navy Department and the American Red Cross for the employment of the Naval Communication Reserve in times of emergency, when the Red Cross func- tions to bring relief to distressed communities Detailed instructions have been drafted to govern the work of each participant in such work. We be- lieve this question is of much interest not only to members of the A.R.R.L. who are also members of the Naval Reserve, but to all amateurs. It will be noted that Communication Method C-1 (re- ferred to in ‘Table A and in the text) provides for using amateur stations not affiliated with the Naval Reserve in case of emergency It is important to understand that this plan in no wise supersedes the Army-Amateur Radio Sys- tem for emergency communication. The Army is the agency of our Government chiefly and directly concerned in acting towards the relief of the popu- lation in time of disaster. ‘The Army-Amateur system exists as a method whereby individual amateurs on the scene may contact direct with the Army, from whom relief is to be expected. Of course every branch of the Government desires to be of assistance at such times. That normal desire, and the wish to give communication aid specific- ally to the Red Cross, are the actuating motives in the present Naval Reserve plan. For details on the functioning of the Army-Amateur net in time of disaster, see page 1, Communications Depart- ment section, QS7' for February, 1930 The complete text of the Navy Department instructions follows: Navy DerarrTMENt OFFICE OF CHIEF OF NAVAL OPERATIONS WASHINGTON 7 June, 1950 From: Chief of Naval Operations To Commandants, All Naval Districts Commandant, Washington Navy Yard Subject: | S. Naval Communication Reserve instruc- tions covering employment in en with American Ked Cross relief 1. The National Headquarters of the \merican nferred with this office on the subject of « rergency In connection Red Cross rergency in- i ation in time of disaster when normal lines of com nication are inoperative. Under such conditions, the Nav al Reserve communication organization including ndi vid J al I en radio stations relieving suffering f the Naval Reserve wning and an be of very great help in ibers « operating saving life and edium of its rhe American Red Cross through the 500 local chapters is developing disaster preparedness lans so that when a disaster occurs in a given community the local chapter, through its disaster relief forces prev wusly organized. can funct ediately with the greatest degree f eff ency \mong the se veral sub-committees op erating as a part of each local chapter's disaster preparedness plan is the Sub-Committee lransportation and Cor junication. It is on this Sub-Committee that the American lted Cross desires the members of the Naval Communication Reserve to be appointed as local liaison representatives of the Naval Communication Reserve In furtherance of the above, the following plan has been submitted to the Headquarters of the American Red (Cross and has been approved by them. The Commandant of each Naval District will make appropriate arrangements so that the Naval Reserve Communication organization in his District, including each individual Reservist owning and perating an amateur radio station is furnished with com- plete instructions as to what to do in case of emergency. Few serious local emergencies occur, but when these do arise, each Reservist should have the information that is permit instant and appropriate action necessary to 5. Types of Disaster Ihe types of disasters that may occur are divided into the following two major classifica- tions a) Predictable disasters; such as 1) General flood 2) Hurricane b) Unpredictable disasters; such as 1) Fire ») Earthquake 3) Tornado +) Sleet storm or blizzard >) Bursting dam, landslide, volcanic eruption, cloudburst, etc o I ‘plosion 6. Preparations for handling emergency communications for predictable disasters are not a difficult matter. Heavy rains or melting snows are usually responsible for floods Hurricane centers can be located and the probable course predicted in advance. Under such conditions, Commandants Districts involved should notify the Communication Ke- serve personnel of the District to prepare to man the Re- serve stations of the District. Duty performed under instruc- tion from the Commandant must be on a voluntary basis and Notices should be sent to insure delivery before ommercial communication lines are destroyed. In addition, the Reservists should have instructions as to what to do in case of a major disaster over a large area, such as might be rhese instructions should without pay caused by floods or hurricanes provide for the following a) Unit or individual amateur stations (Number One) will contact section, master or alternate control stations as per Table A (Method A) b) Section stations (Number Two. will contact master or alternate control stations as per Table A (Method A) c) Master or alternate control stations Number rhree) will contact Naval District Headquarters stations Number Four) as per Table A (Method A In case any link in the Method A chain breaks down, it will be by I assed and communi cations carried on direct with the next numbered station in the chain 7. Unpredictable disasters, usually of a purely local char- ost difficult to provide for. Being entirely is possible. In case a eter, are the nexpected, no specific preparation al disaster occurs, any Naval Reservist should attempt to send a report of the disaster to his Commandant at Naval District Headquarters, routing the message as follows 1) To any Naval Reserve radio station that is pre- pared to forward despatch immediately to the Command- nt of the District in which the disaster has occurred lable A (Method A b) By calling the Naval District Headquarters on a regular Navy high frequency upon which a Naval Dis- trict Headquarters is known to maintain a continuous Method B communicating with any listening watch. Table A If (a) and (b) fail, by radio station (amateur or commercial) on any frequency

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LA R nmunication. Table A (Method fail, by communi- \rea Headquarters and (c) Army Corps ethod D) 1 serious injury requires immediate *‘SOS" at sea, every is (a b earest ut equivalent to an cation should be adopted lan provides for the delivery of emer- ges to the Commandant of the Naval OST Avaust, 1930 furnished to individuals. A copy of Table A should be fy. nished to all Reservists 12. The Red requests minor disasters be handled as above provided a disaster of great magnitude should be immediately reported to the National Headquarters of the American Red Cross in Washington, that However Cross D. C., in addition to the area branch office 13. All messages addressed to the Red Cross where com- mercial charges are involved will be sent “Collect” and all messages sent by them will be “ Prepaid us he deems necessary and will also despatch by Navy Radio or the area office of the American Red irgent Ai e. These are as follows ( , National Headquarters, 17t/ D. C., for disasters in the fol- New Hampshire, Vermont, Massa- sland, Connecticut, New York, Penn- Jersey, Delaware, Maryland, Virginia bia, West Virginia, Indiana, Ohio, Carolina, South Carolina, Georgia, Mississippi, Alabama and Louisiana Cross, Midwestern Branch Office, ivenue, St. Louis, Missouri, for disasters States: Wisconsin, Illinois, Minnesota, North Dakota, South Dakota, \rkansas us, Oklahoma, Texas, Montana, Wyo- New Mexico and Michigan. Cross, Pacific Branch Office, Civic sco, California, for dis sters in the Idal Utah, Arizona, Nevada, Wash- i California. andant will determine from the above me within the jurisdiction of his Naval herefore know to which area office of the lisaster in any given State should be re- radio station in an affected area has no District Commandant, an attempt will ate with the next nearest Naval Dis- us per Table A (Method B) nd complete system should be determined t is quite probable that when a disaster vidual who assumes the responsibility for rd from such area may not have avail- instructions and plans covering the only necessary information should be oa LINE OF COMMUNICATION IPS TABLE Ae ° EA Comm High Freq. comm'’t | 7e/ephone or RADIO [Telegraph C2 STATION IP To Naval Dist. Hdgtrs. and lo Area Hdgtrs. S| . 20-40-80 M Bands (Amateur) — ANY | Ze/ephone or Red Cross 4 on - AMAT Se EUR Telegraph >| 3 B METHOD Emergency calling Frequency-4435-and harmonics -4385- and harmonics : i OR p500-4000 SECTION -4000 MASTER OR [4045 Acs NAVAL DIST. VIDUAL [7000-7300 CONTROL bo00-7300 ALTERNATE | go90 HOQTRS ATION 3500-4000| STATION 4045 CONTROL 4045 | STATION l 7000-7300 e 8090 3 8090 4 A METHOD tral and Eastern Stations West Coast Stations MetHoo A Nava/ Reserve Channel (Normal) 1g on 4435 and harmonics fisteningon4385 and METHOD B Naval Dist. Channel (Emergency) NAT NBA Aarmomcs MetHoD C Amateur and Comm’. channe/ NAJ NAU NPG MeTHOO D Army Corps Area Hdgts. chanel NPC lisaster occurs. The Commandant 14. All Naval Reserve radio personnel will be informed that the following information is desired when reporting a disaster a) First me type of and as much additional information available (b) Second Number Number Number Number Number Number disaster, location as is immediately ne to report message to report: area covered by disaster of persons dead of persons injured of persons temporarily homeless of homes destroyed of homes damaged of families affected 15. As soon as any of the above information is it should be immediately forwarded as outlined Additional messages will be forwarded as rapidly as informa- Personal messages should not be handled obtained, above tion is procured until official messages concerning relief messages have been cleared 16. All of the foregoing refers to messages sent from any affected area. Messages to the affected area will probably have to be handled by the emergency channels until the regular channels of communication are established. For in- stance, from Red Cross area office to Commandant, to Re- serve station or amateur station which handled the out- going despatches. For this reason, it is very important that each station inform each other station in the chain of their operating conditions, frequencies upon which they will receive and transmit and what schedules will be guarded 17. The American Red Cross is advising all its chapters of the above plan 18. Each Commandant is directed to disseminate the foregoing throughout the Naval Reserve organization in his District and to all individual Reservists of classes C-V (5 and V-3. W. H. STanpDLey, Acting. sig sey sta bu mi: In on mit sta the tive the seh: par | arri Bur set | 0.00 be u buil:

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wation diately isaster »tained above nforma- handled ve been om any robably ntil the For in- to Re- he out- int that of their ey will ded pters of ate the yn in his c-V (8 EY, Aucust, 1930 OST 31 Standard Frequency System News Pacific Coast Standard Frequency Station Appointed — Headquarters Standard in Operation ! is our pleasant duty to decided progress in the improvement of the League's Official Frequency System during the last month. The new Elgin station, WOXAM, is well on the way to completion and Mr. Urie writes that inauguration of their standard fre- quency transmissions can be expected in Septem- ber. While the transmitier is being built and tested at Elgin, the station's secondary frequency standard is being assembled by General Radio at report Cambridge THE PACIFIC COAST S.F. STATION Our fondest hopes have been fulfilled. We are happy to announce the appointment of the Official A.R.R.L. Pacific Standard Fre- quency station. This station will be operated by the Don Lee Broadcasting System (KHJ) of Los Angeles, Calif., with Mr. Harold Peery, W6AQG, Chief Engineer of KH, in charge. Associated with Mr. Peery in the S.F. work will be Mr. Ernest G. Underwood, W6ES, Technical Director of KHJ; Mr. Robert W. Murray, W6CTB, and Mr. Dean Moffatt. The assumption of Standard Frequency Transmissions by this group is made possible through the interest of Mr. Don M Lee, owner of the Don Lee Broadcasting System, in the technical advancement of radio and of amateur radio in particular The call of the new station has not been as- signed at the time of this writing. It will take several months to get the necessary frequency standard and transmitting equipment assembled but October should see the beginning of trans- missions. Tentative schedules may be announced in the October issue of QST’ The frequeney standard for this station will be on a par with that of WO9XAM and the trans- mitter power will be similar to that of the other stations in the System. The strategic location of the Pacific Coast Station will make possible etfec- tive transmissions for amateurs in Oceanica and the Far East. It is hoped that early morning schedules can be arranged for amateurs in those parts of the world Coast THE HEADQUARTERS’ STANDARD The League's Official Frequency Standard has arrived in Hartford, after being calibrated at the Bureau of Standards in Washington, and is now set up in the laboratory. Its specified accuracy is 0.005°¢ (1 part in 20,000). A special receiver to be used in conjunction with the standard is being built and frequency checking operations should be under way by the time this issue of QST' is dis- tributed. A complete description of the whole Headquarters’ Standard Frequency set-up will appear in an early issue of QST’. WIAXV PROBABLY TO CHANGE CALL The M. I. T. Laboratory at Round Hill has an application for a new license pending and it is quite probable that this station will be using a new call for the Standard Frequency Transmis- sions within the next month. The new call will be WIXP. This call will not be used for the QRG service, however, experimental license permits operation in the amateur bands for the transmission of Official A.R.R.L. Standard l'requency Schedules only. The old call, W1AXV, will be used for the QRG service described on page 47, May QST’, and page 24, July QST. More fellows should make use of this direct cali- bration service as well as of the Standard Fre- quency Transmissions — and be sure to QSL. We always have plenty of S8.F. report blanks here at Headquarters, yours for the asking. The next two issues of QST are going to con- tain some of the finest articles on frequency measurement and frequency meters we have ever published, (if we do say so ourselves) and an entirely new and better type of frequency meter will be disclosed. Even though you may already have a frequency meter of an accuracy of within 0.1°, or better, you cannot afford to miss this dope. Of course calibration from Standard Fre- quency ‘Transmissions is an important consid- eration in this new development in frequency measurement. Get the habit of listening in on the S.F. schedules now and be ready to use them because the intelligently on your new meter next fall. STANDARD FREQUENCY SCHEDULES FOR AUGUST AND SEPTEMBER \ugust 8, Friday \ \ugust 15, Friday BB \ugust 22, Friday B \ugust 31, Sunday Cc September 12, Friday \ September 19, Friday BB September 26, Friday B September 28, Sunday Cc Frequency Freq cu, i \ B BB © S41) 500 7000 i) 7000 14,000 S-0O8 S550 7100 $:0S 7100 14,100 8:16 S00 7200 4:16 7200 14,200 S:24 700 7300 4:24 7300 «14,300 S$:32 SOO 1:39 14,400 S:40 S000 SiS 1000

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tted to each transmission is now ‘ ed as follows: QST WI1AXV QST QST de Characteristic letter “‘G” broken Statement of frequency in ke. to cure and announcement of next me allowed to change to next es announced by W1AXV are 0.01 S.T. 8:00 p.m. at WIAXYV is 1:00 p.m. is 2100 G.C.T ners are urged to use and report hich is transmitted particularly MARKER STATIONS tions for appointments as ive been received and a num- ve signified their intentions of requency measuring and trans- up to the standard necessary Station appointment. See July QST New England Division Convention land, Maine, August 22-23. Maine Section) ) set, fellows, for this year’s 1¥," Convention to be held at Portland st 22nd and 23rd at the Eastland ind Amateur Wireless Associa- rdial invitation to all hams; hers, brothers, YL’s and OW’'s be good talks, the committee entertainment; trips, ete. The Radio Supervisor or one ill be present. Everett L. Battey, \ munications Manager, of A.R.R.L. vill be the official representative plenty of ns to attend and write Manley v Hemlock St., Portland, Maine. » Midwest Division Convention _ iE COLLEGE, Ames, Iowa, again warm welcome to amateurs on nd 10th for the annual Midwest D R.L. Convention and Ninth Radio An short Course. Thanks are due Mr. D Director of ISC’s Engineering Ex- OST Avaust, 1930 tension Service, for the courtesies extended by his department. President Huntsinger of the Campus Club, Mr. Konkle of WOI, A.R.R.L. Director Huber, Section Manager Kerr and all others who assisted them and extended coéperation should receive credit in due proportion for the success of this convention. The first day brought a record registration, and there were about 140 present at the banquet Saturday. The sessions in the engineering build- ing got under way on scheduled time l'riday afternoon, Cieorge Hansen, W9FFD, of the Tri- State Club presiding. Section Communications Manager H. W. Kerr, WODZW-W9QP, officially opened the convention, and following his remarks Director Huber gave an account of the subjects considered and action taken at the A.R.R.L Board of Directors’ meeting in Hartford, from which he had just returned. Ensign ‘‘Chuck” Morgan, W9EFH, spoke interestingly on the U.S. N. (C.) R., clearly explaining the organiza- tion and its purposes. R. J. Rockwell of Omaha gave a good talk on practical methods of calibrat- ing and adjusting condenser microphones. Mr Walter of the Jewell Electrical Instrument Com- pany next spoke on measuring instruments F. k. Handy of A.R.R.L. headquarters discussed the new regulations, log-keeping, operating pro- cedure, and reported on the seasonal characteris- tics of amateur activity. J. P. Dobyns, W9DXP, spoke on the Army-Amateur Net organizations The afternoon ended with a discussion of direc- tive antenna systems by Technical Editor Lamb of OST. The evening was devoted to inspection trips and informal ‘‘hamfesting \ll departments of the college were open for inspection with special demonstrations in connection with VEISHEA, the college's annual exposition showing the work of the several departments of the university to the public. For the most part the interest of ‘‘hams”’ was in the electrical lab., in WOI, and in the Campus Club shack where W9DTI was in full operation, and the wealth of convention prizes donated by generous manufacturers was on display. The second day of the convention opened with a plea for frequency observance by F. V. Sloan of the Radio Supervisor's Office, who had devoted his time two previous days to giving com- mercial and amateur operator's license examina- tions. Causes and effects of off-frequency opera- tion were discussed by F. E. Handy, A.R.R.L Communications Manager, leading up to the dif- ferent parts and types of amateur transmitters and the effect of each on frequency stability Professor J. K. MeNeely of lowa State College lectured on radio interference. This was made doubly interesting by the display of his equip- ment and slides showing oscillograms identifying different sources and types of interference After lunch, the meeting was resumed with

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430 ’ his ipus ctor who vuld is of ion, juet uld- day Tri- ions ally irks ects v.L rom ck the iza- aha rat- Mr om- nts sed pro- TIS- XP, ms rec- imb rips s of cial KA, ork , to of and s in Hion 3on vith oan ted om- ina- pra- ..L dif- ters ity lege ade llp- ing vith Aueust, 1930 Vernon Holmes, of the University of lowa Ama- teur Radio Club, presiding. A movie showing amateur stations was run off. The subjects for the afternoon disclosed an unusual amount of yaluable technical information. E. O. Johnson, Service Engineer for R.C.A.-Victor, spoke first on ‘Transmitting Tubes.’’ Carl Menzer, Director of WSUI, gave an intensely interesting and in- formative talk on ‘Improving ’Phone Trans- mitters,”’ full of valuable tips for the proper handling of microphones and stations. J. W.Doty, KOIL-W9GDG, discussed the work of Mr Tyd- berg and himself on ‘‘Screen-Grid Detectors.” F. H. Schnell, Chief of Staff of the Radio and Television Institute, spoke interestingly, stressing frequency observance. After showing the details on blackboard and screen, his new shortwave superheterodyne receiver was demonstrated. J. J. Lamb, Technical Editor of QST, followed with a discussion of oscillator-amplifier trans- mitters as the final subject of the afternoon The Campus Radio Club deserves hearty thanks for the banquet at the Hotel Sheldon- Munn on Saturday, which proved the climax to this most successful convention. Director Huber kept things moving in his capacity as toastmaster. The banquet speakers were S.C.M. H. W. Kerr (Grandpa to the Iowa boys), Head- quarters’ representatives including Technical Editor Lamb and his bride, Lt. Bellew, Ensign Morgan, J. P. Dobyns and F. f1. Schnell. Every- one enjoyed the Cleveland Air Race Film which was a special feature of the program. The Liar’s Contest extraordinary was won by Dobyns, W9IDXP, who displayed greatest ‘“‘inventive- ness." The entertaining stories spun by Sadilex, W9APM, and a dozen others added to the fun, and competition was keen. Phil Konkle of WOI auctioned off some big power tubes to the highest OST bidder. Then came the wholesale distribution of prizes including apparatus of all descriptions! There will be some fine signals on the air with all the power supplies and other station equip- ment put into use. (We hope the recipients will not forget to drop a suitable note of thanks to the manufacturers.) The convention ended at a late hour that night, some of the discussions lasting into the next day. Many are already planning on next year’s Ames Convention again to benefit from the ‘‘short course’’ and renew friendships made over the air. — F.E.H. Ge Strays “4s W1NX had an unusual experience recently. His chemical rectifier is installed in the cellar, and one day he noticed that his input was below nor- mal and the signal was very unsteady. An in- vestigation of the rectifier disclosed that a snake had crawled into the jars to keep warm. This snake got all the warmth he wanted — and more! While experimenting with screen-grid detec- tors, WIADF found that the secondary winding of a 3 to 1 Thordarson audio transformer makes a suitable coupling impedance for the plate circuit of the detector. The regular transformer connec- tions cannot be satisfactorily employed because of the low impedance of the primary compared to the tube impedance. The pocket testing device manufactured by the L. S. Brach Manufacturing Corp., Newark, N. J., contains a small neon lamp which will be found useful around the station. About 90 volts will start the bulb glowing. ——_ K6ECL Finding the Expeditions Remarks sartlett Northeastern Greenland Expedition, Ed Manley, Operator MacMillan Expedition to Labrador, Greenland, and Iceland, Paul Davis of WOADU, Operator. Left Bermuda June 20 for Southampton England. Will go down coast of France to Gibraltar, then to Azores, Chance of W3AIQ, Operator Summer cruise * through the West Indies during July and August. Count von Luckner and party of fifty American boys, J. Pascal, Operator 1 on Frequency (ke Call tion Signal 8.8. Morrissey 9100, 7500 VOQH (500 cycles) Schooner Bowdoin 5555, 8330, 11110 WDDE Yacht Antares 8300 (200 watts) d.c. WODK lacht Mopelia 6670 DAIV utwright, 3500-band VOso Labrador reenland 7350, 13040 XORC east coast) Second Roumanian Arctic Expedition,** H. L W6BSB, Operator. Will start operation about Aug. 15 and be on Grenfell Mission, Edgar V. Seeler Jr., Operator. Bassett of lookout for all W signals *Count Felix von Luckner is offering a cup to be presented to the amateur operator who gives the best communication “rvice to and from the Mopelia during this course ™ A worthwhile award is to be made to the amateur performing the greatest service for this expedition during its several nonths on location in Greenland

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OST AUGUST, 1939 The First Conviction Under the Radio Act pl Lint, us Avenue, on ouis Amateurs Cooperate in Running Down an Unlicensed Station By Porter H. Quimby, W9DXY * the amateurs, through the agency O.B.P. Radio Club, maintain what an interference committee. This tee operates in conformity with the of self-regulation. It investi- ts against amateurs and makes ns for correction of interference, with the Department of Com- leavor to keep everybody happy Act of 1927. The secretary of this ippointed by the club. He receives e Radio Inspector, the broadcast- the Radio Trades Association of ever one of these bodies receive a imateur interference. He investi- calling on the club for men to help him. If he finds amateur makes the necessary recommenda- rrection, and usually gets immedi- is or any other trouble he may find the club and also to the source of this way very little policing is the Department of Commerce. er of 1929 a station started up in ng the call letters W9ZR. It was by one George W. Fellowes at about 1565 ke., c, voice, telephone conversa- rebroadcasting such other pro- re picked up out of the air sen, a neighbor of Fellowes. was is receiver when Fellowes was ise the latter's signals covered » dial and blanketed out other nm asked Fellowes to correct the quickly told where to go, with ut the station W9ZR was put up mal supervision of the Federal | must not be disturbed. Janssen er of complaint to the Radio referred it to our interference committee secretary called up ed him to correct the trouble. He he could broadcast music and on an amateur license, and such a license. He was told the licensed by the Federal Radio 1 experimental station and could ised, and if B.C.L.’s were inter- iwest Division, A.R.R.L. St Louis, fered with it was just too bad. The secretary then reported his findings to the Radio Club and to the Radio Inspector. He also reported the matter tome as the then Director and asked that | take steps to correct the matter. | wired the Supervisor, and action started. Radio Inspector William J. MeDonnell ap- peared on the scene, made a survey and referred the matter to the U.S. District Attorney's office, which in turn called on the Department of Justice to make an investigation and _ collect evidence for a prosecution. The Department of Justice assigned their special agent, John E. Brennan, W9AC, to the case, who requested coéperation from W9DXY, W9BEQ, WO9P\W, W9DLB, W9ZK, ex-W9AOT and others. Under the direction of Radio Inspector McDonnell these men were deployed to various points to receive and record the transmissions of W9ZR. The investigation established that W9ZR was operating on or about 1565 ke. with a radiophone which caused interference throughout St. Louis and was heard as far away as Park's Airport, near Cahokia, Ill., and in the Federal Building at East St. Louis, Ill. The ingenuity of the amateurs made possible the recording of the complete program transmitted from W9ZR. Brennan of W9AC is to be especially commended for his work in this connection. When the necessary evidence had been ob- tained, warrants were secured from the U. &. Commissioner for the arrest of Fellowes and a search of his premises. ‘These papers were served on December 16th by Deputy U. 8. Marshall Norton, with the assistance of the R. I. and amateurs deputized for this work. The station was found in operation at the time and the apparatus was dismantled and confiscated, and Fellowes lodged in jail. At a hearing January 16, 1930, before the U. S. Commissioner, sufficient evidence was introduced to cause the defendant to be bound over to the Federal Grand Jury. On Febru- ary 12th this body returned a criminal indict- ment against Fellowes, charging the operation of a radio station for communication between the States of Missouri and Illinois without station or operator's license; that this station interfered with the reception of signals emanating from a licensed station of another state; that he rebroad- cast programs of a duly licensed station without the necessary consent of such station. The maxi- Al mu chs

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1930 sed v then to the rtome Leps to r, and Il ap- ‘ferred office, nt of collect ent of hn E. uested OPW, Under | these eceive R was phone Louis , near t East ateurs nplete an of r his n ob- U. S$. und a erved rshall and n was iratus lowes 1930, dence to be ebru- idict- ‘on of n the on or fered om a road- thout naxi- Aveust, 1930 mum punishment on conviction of any of these charges is a fine of $5000 and a sentence of five years’ imprisonment. ” The case went to trial before Federal Judge Faris on May 6th in St. Louis. This being the frst criminal prosecution brought under the Radio Act of 1927, Paul D. P. Spearman, Assist- ant General Counsel, John E. Baron of the engineering staff, and George I. Smith of the Licensing Bureau, all of the Federal Radio Com- mission, were in attendance. Mr. Spearman as- sisted U. S. Attorney Stattler with the prosecu- tion, while Messrs. Baron and Smith were called as expert witnesses. Operators from KSD and KMOX and a number of amateurs were called on to testify. Every claim that was made by Fellowes in defense of his operation was refuted by testi- mony of government witnesses, composed largely of amateur operators, and resulted in his convic- tion by the jury in less than an hour. The court commented at length on the neces- sity and value of a law regulating radio communi- cation, and upon the wisdom and fairness of the Radio Act of 1927, stating that enforcement of this law was vital to the welfare of society. He stated that a violation should receive a substan- tial punishment, and thereupon sentenced the defendant to a term of one year and one day in the United States Penitentiary at Leavenworth, Kansas.! While the defendant was not an amateur, and was not using an amateur frequency, he had wurped an amateur call and was using typical amateur equipment and calling himself an ama- teur broadcast station. It was therefore important to the amateur fraternity that he be shut down and prosecuted, as he was flying false colors and calling down the wrath of his neighbors upon the amateurs. We, as amateurs, should feel highly gratified with the effort made by the several departments of the Government in removing from our midst a station that was operating to wr detriment. The Government, on the other hand, should and does feel highly gratified with the whole-hearted coéperation afforded by the amateurs, as is attested by letters I have received fom Mr. Stattler, U. 8. District Attorney, Mr. Spearman, Assistant General Counsel of the Federal Radio Commission, and Mr. H. D. Hayes, U. 8. Supervisor of Radio at Chicago. Dummy Antennas (Continued from page 16) dummy and the other end in the neighborhood of the monitor. An untuned link circuit could be wed for that super-low power set. Monitoring for ’phone is also quite straight- ‘Fellowes is a British subject. With his consent he is ing deported to England, rather than serve his prison tatence, — Epiror. OST 35 forward and may be done in the same way as for c.w. A system of continuous aural monitoring used universally in broadcast transmitters is shown in Fig. 2. It consists of a vacuum tube linear rectifier coupled to the antenna circuit and feeding a loudspeaker or headsets through an output transformer. The commercial monitor has a big job. It actuates a signal relay, furnishes excitation for an oscillograph and operates a half dozen or so speakers through a one- or two-stage amplifier. Consequently, commercial monitors use tubes ranging up to the 50-watt size so as to supply sufficient power. However, for our use we will find a Type ’16-B or a Type ’S81 more than big enough to operate a loudspeaker, and a Type ’01-A with grid and plate tied together will rectify sufficient power for headset operation. The filament supply for the monitor tube can be obtained easily from the transmitter filament supply, dropping the vol- tage by resistors if necessary. The size and the number of turns on the pick-up coil are relatively unimportant. For headset or small speaker operation, the output transformer might be done away with by using a by-pass condenser across the headset or speaker. When using a dummy, phonograph records make a very good method of checking up on an amateur radiotelephone set. Lacking facilities for that, an assistant speaking into a microphone in another room might be substituted. Come on fellows, help reduce the QRM! Two bits and a trip to the junk box will fix you up with that dummy antenna. Be Strays “Ss. The International Resistance Company has prepared a booklet entitled ‘‘ Resistor Replace- ment Guide,’ which is a compilation of circuit diagrams of popular broadcast receivers mar- keted during the past three years, with particular reference to resistors. Power ratings and resistance values of all resistors used in the sets are indi- cated, so that the proper type of replacement unit to choose can be quickly determined. Copies of the guide will be sent free of charge to dealers and service men on request. Inquiries should be addressed to the above company at 2006 Chestnut St., Philadelphia. The range finder of an ordinary Kodak makes a first-rate microscope for examining the edges of a crystal for small cracks and chips, since it has a great deal more magnification than the ordinary reading glass. The crystal should be held next to the finder and the latter close to the eye. —Ex-W6éBOY, W6BZW

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r ~~) [] OST AvuGusT, 193) Experimenters’ Section 7-MC. CRYSTALS Herbert Hollister, WYDRD* old order changeth, and our me. quartz plates are now in a s with our last summer's golf pants. are not only obsolete, but they to the 14-me. band with 1.75-me. res too many tubes and more plate nphasize the fact eption ie result justifies. The trick is still h 3.5-me. oscillators, but now that und has been dished up to us on a he pioneers, we are faced with the em forces attention to those terribly easties, the youngest useful mem- piezo family: 7-me. crystals. With frequency it is possible to operate band by straight amplification, the doubling once, and the 2s-mc. ing twice. It is the purpose of this that these ultra- re in every way practical and de- plates which have been used vast three years have been almost cut on the thick axis (“X ~mn ; cut on this axis average about 2.6 OOL” of thickness, which means a vill finish up about .016” thick. This o be a very desirable advantage thickness of the thin-cut plates of yuency. thick-cut plates have earned for her a shady reputation through havior.' After nearly three years of older to make the plate start up, ing the plate in Carbona at least and grinding out the burned holder plates once a week, the idea 1 to us to do something about it g the advantages of the thin-cut thick-cut ones at 3.5 mc. it seemed 1e same advantages might hold for recalled that the thin-cut plates more readily than the thick-cut : the thickness of the plate was not Edge finishing on the thick-cut so much more important than on lhe “proof o the pudding is in the rm Kansas n does not agree with observations of other thin” or “Y ‘ erystals often reso- cies fairly close together, whereas the crystals do not exhibit this character- April, 1930, QST. — Ed. cut eating,” so a thin-cut blank was ground down to about .011” thickness. From its first test in the oscillator, this little wafer has shown no tendeney to develop the idiosyncrasies of the thick-cy: plates. Obviously a plate so thin requires careful han- dling, but even so it iseasier to grind a useful 7-me plate from a thin-cut blank than from a thick-cut one. About the only precaution to be observed is to keep from grinding the center of the plate thinner than the edges. This is very apt to hap. pen, because a plate so thin is quite elastic and will bend with the pressure of the grinding finger unless it is reinforced by a flat piece of glass or metal. A piece of microscope slide about one inch square, ground flat on a new piece of plate glass with FFI abrasive, makes a fine backbone for the grinding job. The blank should first have one face carefully finished with FFF or No. 500 Alundum or Car- borundum grain. If the plate is held so as to re- {lect light from an electric lamp, it will be possible to tell when the entire face is smoothed up. From then on all of the grinding is done on the other side. When a thickness of about .025” is reached it will be necessary to moisten the crystal witha drop of water and stick it to the previously pre- pared section of miscroscope slide. If this is not done it will be impossible to keep the hills and valleys out of the plate. After .020” is reached the pressure of the finger should be somewhat lighter than before or the crystal may be crushed to pieces against the abrasive. Down to about 015’, No. 150 grain may be used but from there on nothing coarser than FFF will do. The finished plate may well be .0003” thicker in the center than at the edges. The slab used for 7-me. plates should not be too large, because of the danger of breakage and the greater difficulty of obtaining a plane surface The ideal size seems to be about 34” square, for there seems to be no greater output obtainable with larger sections. Many of these very thin 7-me. plates have been ground here and a few have been broken, so we feel competent to point out the most likely points of danger. Probably the easiest way to break a crystal is to catch it in the micrometer while checking it for thickness. Another excellent method of making little ones out of big ones is to bear down hard while finishing up the edges ona carborundum stone. But by and large there is nothing prohibitive in the grinding of a 7-me plate, and it is our opinion that anyone who can turn out a good oscillator at 3.5 me. can do the same thing with a 7-mce. plate. Just a little more patience is required. ae hot whi sms cry: Er;

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- 1930 OWN to in the ndeney ick-cut ul han- ] 7-me ick-cut rved is plate oO hap- ic and * finger lass or 1e inch e glass ne for refully yr Car- ; to Te- i »ssible . From > other eached with a ly pre- is not lls and eached 1ewhat rushed about n there inished center not be ge and urface ire, for ainable s have yroken, t likely way ometer cellent es is to es on a here is 7-me ho can do the e more AveustT, 1930 One very interesting fact has been noted while testing these 7-mc. plates in various holders. It seems that the size and surface condition of the holder plates has a decided effect on the fre- quency of the oscillator. It has been possible to change the frequency of a 7-mc. plate by as much as 16 ke. by simply transferring the plate to another holder. No attempt has been made to learn the reason for this, but that it is a condition which has advantages and disadvantages is quite evident.” Most any sort of a holder that works well with thicker plates will do for the 7-me. plates but a rather light top plate is desirable. About 200 volts on the plate of a Type ’10 oscillator seems to suit the thin crystals very well. BIAS FOR THE POWER AMPLIFIER The problem of obtaining fixed bias for an amplifier following a crystal controlled oscillator without investing in several blocks of ‘“‘B”’ bat- teries has been solved by R. B. Lawrence, W6DXK, who uses the plate supply to the crystal tube to provide the bias for the amplifier. The circuit diagram is shown in Fig. 1, and here are his remarks about it: ‘While constructing a piezo-electric controlled transmitter recently the item of negative bias for FIG. 1 the amplifier came under consideration. The price of the number of ‘B’ batteries prohibited their use, and a 135-volt ‘B’ eliminator is not entirely satisfactory. Consequently, it was necessary to dope out some form of circuit whereby the oscillator power supply might be made to perform a double duty and supply bias for the amplifier. “The circuit diagram herewith sufficiently illustrates the ide’. The constants of the circuit ? The oscillation frequency of any crystal is determined not only by the crystal itself but also by the conditions under which it is working. The frequency can be varied within small limits by simply changing the pressure on the crystal or, if there is any air gap between the top plate and the crystal, by varying the width of the gap. The General Radio Erperimenter for February, 1930, will be found interesting i this connection. — Ed. OST 37 are the same as in ordinary practice. The only noticeable difference between this circuit and the usual oscillator-amplifier circuit is that of a separate filament supply for the oscillator and a grounded positive supply for the oscillator plate voltage. ‘This circuit may be keyed in any fashion the individual may prefer. I have shown keying in the negative supply lead to the amplifier but did not illustrate a key-thump filter as it would be up to the individual to decide upon the form satis- factory for his installation.” SOME HARMONIC PECULIARITIES Most of us have, at some time or another, lis- tened to our transmitters on receiver harmonics, or tuned the receiver to a harmonic of the trans- mitter, and wondered why a note which was al- ways reported pure d.c. on the air had so much r.a.c. in it in our own receivers. The natural in- clination is, of course, to doubt the veracity of the other fellows and believe our own ears. However, it may be that the ears are at fault and the audi- ence is right! The following letter from E. G. Watts, Jr., of Miami, Florida, explains why: ““Most of us have used a receiver with one of its harmonics beating against another oscillator, and have noticed that some of the receiver har- monics produce beat notes having a queer twang quite unlike the ordinary pure beat note. It sounds like nothing so much as the ‘meow’ of a cat. 1 wonder how many of us ever stopped to figure the phenomenon out. I ran across it several years ago while checking crystal oscillator per- formance on the harmonics of a broadcast re- ceiver. I have never seen mention made of it in any publication. It is very simple, and perhaps well known, but I would like to offer my version of the explanation. “If the second harmonic of a receiver of the ordinary autodyne type is made to beat against the fundamental of an oscillator having an un- modulated output, in the absence of appreciable oscillator harmonics the beat note produced will be the ordinary pure whistle; to all intents and purposes, a single frequency. Let harmonics of strength comparable to the fundamental now be added to the oscillator. The receiver harmonics are already assumed to be of this strength. The second harmonic of the oscillator will now form a beat with the fourth harmonic of the receiver, and so on down the line, with all the even har- monics. While this collection of beats is at zero beat simultaneously, at any other audible beat frequency no two are alike. The frequency of the beat produced on any given harmonic is greater than that which would be produced on the fun- damental (none is being produced on the funda- mental in this example) by the number of the harmonic. Thus in an instance where harmonics of both receiver and oscillator are strong, we hear a composite collection of frequencies simultane-

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the harmonics as well as funda- of the single pure tone ordinarily nes combine and recombine, beat- form new tones not fundamentally the result is the queer sounding is quite unique. It is worth the ip the apparatus just to hear it. rystal-controlled oscillator and the ver have sufficient harmonic com- ‘oduce the effect noticeably. The resent on some of the receiver har- on others, is that the even har- xduce a beat, while a little thought only every third odd harmonic with the result that the effect is rnible on odd harmonics. There- this a means of distinguishing rom odd in to be seen why a monitor work- s, either its own or those of the nnot be relied upon to give an tion of what the transmitter the distant receiver. When a re- is beating against a modulated tter with ripple, for instance onies of the latter are also present he note will sound worse than it to the multiple beat effect and n of the modulation products be greater on the even harmonics than on the odd, because of the f harmonics in the former case, tive in producing multiple beats. tuned to a transmitter te will again sound worse than it the defects in the transmitter ied directly by the number of the nitor is repeatedly surprised at the well informed amateurs impression that harmonics exist low and high frequency | oscillation. That harmonics and not fractions, of a clearly demonstrated by the which is useful as well: Tune an er to zero beat with an oscillator her oscillator to five times this tther high harmonic, as the rly defined the higher the har- r zero beat as heard in the re- detune the receiver, noting the extend over a wider range than t, the ratio of the two ranges ts ber of the harmonic to which the is tuned. If the receiver dial ely enough to compare the two ured from inaudibility on one ro beat, to inaudibility on the tio thus determined, an unknown be evaluated. The effect is due, of ct that the receiver covers more erwise sides iltiples, OST AvaGustT, 1930 territory on the harmonic, in proportion to the degree of the harmonic. Now, if a harmonic ex- isted at one-fifth the oscillator frequency, as well as at five times, it would obviously cover the same range as the beat from the first oscillator, which is in resonance with the receiver. But it does not “Occasionally a quartz crystal in the process of grinding will cause its oscillator to generate myriads of frequencies which set up countless beats either side of the main oscillation. This is a condition of super-audible parasitic oscillation, of frequency generally between 10 and 40 ke If the adjacent beat notes overlap slightly the frequency is likely near 10 ke., and if spaced apart, higher. The beats are the side bands of the super-audible frequency and its harmonics, beat- ing against the fundamental frequency. The ex- tent to which the beats extend either side is de- pendent on the strength of the harmonics. Since they usually extend several hundred kilocycles, harmonics as high as the 25th must be appreci- able. This parasitic oscillation is probably a mechanical action in the vibration of the crystal, or may be a beat between two higher frequencies. I have known of several crystals producing audio frequencies in this same manner, sufficiently sus- tained to nicely modulate the wave. The tone was also audible directly from the crystal mounting. The lowest frequency | have heard thus produced was below 500 cycles.”’ SCREEN GRID DETECTORS IN PUSH-PULL The use of the screen-grid tube as a detector for high-frequency reception is increasing rapidly, and some experimenters have been searching for means of obtaining oscillation at higher frequen- cies than the usual detector connections will allow. J. 8. Cebik, W1ATG, found that the tubes would operate satisfactorily in push-pull on frequencies where a single tube could not be made to oscillate. He writes as follows: “It has been mentioned that screen-grid tubes do not oscillate readily on fre- quencies above IS or 1 me. because of the in- ternal capacity between the elements. A way to get around this is to use screen-grid detectors in push-pull so that the tube capacities are in series. “It will be noted in the diagram, Fig. 2, that the tuning capacities are in series so that the capacity of each section of the double condenser must be about twice as large as the size normally used in a single-tube detector circuit. “The rotor plates of condensers are grounded, thus allowing the inductance and the circuit to find its own electrical center and making it un- necessary to match tubes in this circuit. “The screen-grid voltage has been found to be critical. Without the correct adjustment the cir- cuit will not oscillate properly. A variable resistor in the plate circuit is used to control oscillation. “The inductances are wound on tube bases and occasionally eli tic det ot the

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1930 o the ic eX- S well r the lator, Sut it rocess erate ntless is isa ation, 0 ke v the paced of the beat- 1€ eX- is de- Since ycles, preci- bly a ystal, ncies. audio y sus- e was iting. luced tector pidly, ie for quen- ; will tubes ll on made that n fre- 1e in- ay to yrs in eries. that t the enser mally nded, 1it to t un- to be e cir- sistor ition. s and Avaust, 1930 the antenna coil is made adjustable to obtain best results. The receiver should either be completely shielded or the filament and plate supply be spaced at least three feet from the receiver to OST 39 oscillator-amplifier transmitter described in September, 1929, QST’. W9AAG has been successful in working both coasts consistently with this outfit, and the sig- nals are often reported ‘‘crystal d.c.” A good d.c. plate supply is used, of course. portion of the low-power AN A.C.-OPERATED RECEIVER WITH D.C. TUBES A California experimenter, who wishes to remain anonymous, writes as follows: ‘‘T should like to call to your attention a method of constructing an a.c.-operated short-wave receiver which I have found RFC R; tk TYPE 22 ' nce : a > R23 R, 3 = = t t.) é *+SG 25VAC +200 FIG. 2 ( rn Cardwell enser (transmitting type) sd divide to t gual sect ulated from each othe C: 100-ppfd. fix lenser Cs— 1 pid Ci — 6000 ppfd Ri — 1-megohm grid leak R: — .25 megohm Rs — 100,000-ohm variable resistor No data on the coils are given, since this layout of the receiver itself The proper sizes for the various be determined by the “‘cut-and-try"’ process eliminate a.c. hum. This circuit requires a larger tickler to make it oscillate than the single tube detector circuit. ‘The writer would be interested to hear from others who have done any experimenting along these lines.”’ CONVERTING THE SINGLE CONTROL TRANSMITTER TO PUSH-PULL Dallas Johnston, W9AAG, of Viola, Ill., writes us that the push-pull version of the “TNT” transmitter described in December QST7' has better frequency stability with changes in plate voltage, as well as greater power output, than the original single-tube outfit. He has been using a pair of Type ’12 tubes in the set with about 400 volts on the plates. The circuit at W9AAG is shown in Fig. 3. The set has not been used on 3500 ke., so no constants are given for that band. As an approximation, lL, should have 14 turns of copper tubing 2% inches in diameter, and Le about 60 turns of No. 30 d.c.c. on a 1-inch tube. It must be remembered that the grid coil dimensions given in Fig. 3 are for Type 12 tubes, and other types will probably require some modification of these coils. The number of turns on each should be adjusted until best output is secured. The two grid coils may be combined into one tenter-tapped coil, if desired. Approximately the tame total number of turns will be required. This arrangement was used in the oscillator will depend largely on quite satisfactory. It uses Type ’99 tubes, with filaments, plates, and grid biases all supplied from a ‘B’ eliminator. Fig. 4 shows the circuit. ‘A Clarostat is inserted, if necessary, between the eliminator and the set, and so adjusted that 60 ma. are drawn. The resistance R, may be 367 ohms, R,. 50 ohms, and R; 1000 ohms. These resist- ances are conveniently made by winding them one after another on thin bakelite strips about an inch wide, using No. 40 Advance wire and giving a coat of shel- lac after adjustment to the proper values. The wiring of such a set is very unobstru- sive and simple, and because of complete separation of currents in the various stages, feedback is eliminated without any filtering. Of course, a second audio stage can be added using 1 r de Cs T ac the can L 3 W R, L, >. , L RFC : + FIG C1 500-ppfd variable condenser. ( 2000 ppfd. 250 ppfd l 6 turns of 4%" copper tubing, 24%" inside diameter, for 7000 ke 8 turns of 4 for 14,000 ke. — 25 turns of No. 30 d.c.c. on 1" form for 7000 ke. 12 turns of No. 30 d.c.c. on 1” form for 14,000 ke. ki 12,000 ohms ” copper tubing, 244" inside diameter, R 75 ohms, center-tapped RFC — 226 turns of No. 30 d.c.c. on 1" form. The antenna coupling coil, Ls, will depend on the size of the antenna or the tuning system used. Any of the common coupling arrangements may be employed. the same system; and it is also simple to put a sereen-grid tube before the detector if desired. The DeForest people make a screen-grid tube, the

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nent of which draws only 60 ma from hum of such a set is all that red, particularly if the ‘B’ elimina- ted that a choke is placed in each the filter. Be sure, of course, that tor will give 60 ma. at the voltage ter to use a Type ‘SO tube than a the eliminator, since many small s are thus avoided, but a Raytheon well. The detector grid return works negative filament lead of the ‘99 for seems to depend on the amount of supplied to the detector. Fringe taken care of by any standard idvantage of such a receiver is that iway, Without waiting for a Type REMOTE CONTROL WITH RY VAPOR RECTIFIERS A. Hubbell W9ERI verage amateur is generally quite f the advantages of remote control, liscouraged at the prospect of run- f wires for the keying relay, a pair of power supply, and, if he owns a wr rectifier, another pair of wires, or nore wire, for the filaments of these remote control system to be de- wires perform all these functions. vs a pair of 6-volt relays, arranged to power and also key the transmitter consists of a single long electro- two armatures, each with separate adjustment. One armature is set pring, so that it will close with ap- hree volts applied to the magnet, is set with a stiff spring, and does il nearly the full six volts are ap- can be constructed from any old ince it will remain in the circuit as long as the rectifier tubes are ive comparatively high resistance, tery will not discharge quickly. The tU was bound with No. 30 d.c.c 00 turns on a soft iron core, and has ly 12 ohms resistance. This draws a yntinually, which is but the equiva- ype ‘O1-A tubes, and will run a long time on a single charging wire from one side of the power ted to one side of the keying relay, ries with this center lead, a six-volt nnected. The other lead from the ‘eturns to one side of an ordinary ich the key is plugged lines indicate the control box, form of a 4-inch cube at W9ERU. Street, Rockford, Ill OST AvuGust, 1930 The center wire connected to the two relays with the six-volt battery in series terminates at one side of a single-pole single-throw switch on the ! _. ne | ie eral ">. tn | E l | | Com LL i , FIG control box panel. The other wire from the power relay terminates at the other side of the single- pole, single-throw switch, S,, with a resistance in series of a value sufficient to cut the voltage on the relay down to about three volts, or whatever value will allow both armatures to work satis- factorily, yet not close the armature controlling the plate supply until nearly the full six volts is applied. The second single-pole single-throw anaes eened) = pe Rect switch, S., shorts the resistance out. It is impossi- ble to close the circuit of the plate transformer until the rectifier filaments have been lit, al- though the circuit may be closed immediately after, with consequent damage to the tubes Since the total amount of resistance in the re- lav circuit when the filaments of the rectifiers are lit limits the current to a small value, there is no need to build trick relays to lessen the drain. If good magnets are used, with a bar of iron at E-F, indicated by dotted lines, the full amount of current used to operate the transmitter should total not more than one-half ampere at any time, 3 During a QSO switch S: may be left closed, thus keeping the filaments of the rectifier tubes hot while receiving. Plate power is then switched on and off simply by throwing 5». Ifa separate filament transformer is used for the transmitting tubes, its primary may be put in parallel with that of the in rectifier filament transformer. — Ed har thr ble ) ten. hol of « stré inc] blo det. Re diff thei cle mut wit]

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1930 'S with at one on the power single- ince in on the atever satis- rolling rolts is -throw 1 possi- former it, al- liately the re- ers are e is no ain. If t E-F, unt of should y time, keeping g. Plate rs Ifa smuitting t of the AvaustT, 1930 depending quite a bit on the keying relay, of course The contacts for the 110-volt circuit may con- sist of heavy silver, or any metal of good current- carrying capacity which will not burn easily. At W9ERU carbon and steel contacts have been found very successful. The relay must be covered, however, or sparks may fly occasionally. MOUNTINGS FOR TRAMSMITTING COILS Theodore Stahl, of Jackson, Mich., sends us a suggestion for mounting copper-tubing coils which not only provides for convenient changing of coils and good electrical contact but also allows variation of coupling. A drawing of the mounting is shown in Fig. 6. It is made from a brass block 14 x %4& x % inches, and can be constructed with the aid of a few tools of the type usually found in the home workshop. Two of these blocks are of course re- quired for each coil. The tapped holes are fitted with screws which serve to fasten the block to a sub-panel or bracket. The screw which is threaded through the right- ¥* D, Ne D1 i ' i 7 r Tv — wondn=-$--f---9 ' ¢ oon ot emeeatorrr==4 oo ; ate” ne + of 4 it Zz f jar — ee ee +----+-- Si “ft 4 . lh, = c . Ich S Qe) a Noa ed ond tapped - . Phi hy Oia for 8-32 Screw FIG hand hole should be long enough to project through the 3, 16” hole in the upper section of the block, and a nut is put on it to allow adjusting the tension on the coil end when inserted in the 4” hole. A wing-nut will be handy for rapid changing of coils. If the ends of the copper-tubing coil are straightened out for a length of four or five inches the coil may be slid back and forth in the blocks, thus allowing coupling to be varied. RE: SCREEN GRID DETECTOR Amateurs having troubles with screen-grid detectors may profit from the remarks of E. B. Redington, WSAJ, of Savannah, N. Y. His difficulties were many, and he writes concerning their cure as follows: “Remember in QST' a few years back the arti- cle entitled If You Only Try? I have been very much reminded of that while doing some work with screen-grid regenerative detectors. “T built the receiver described in the April QST in the article, ‘The Superiority of Screen-Grid OST 11 Detectors.’ Apparently every screen-grid outfit is a problem in itself. Mine didn’t perk at all well I tinkered with the detector leak resistor and finally it worked after a fashion with 15 megohms but had a bad fringe howl. If I tried 10 or less, it had a hangover of from 4 to 5 degrees on 3500 ke. and 20 degrees on 14,000 ke. Too many, said I. Furthermore I was forced to use a 100,000-ohm leak in the audio stage. The amplification was ter- rific, however, and I can believe everything I have read about such receivers. “It also had a bad tendency to howl if I brought my hand near. I cured this by shielding the control grid lead with copper tubing and grounding. But still the fringe howl and the need for such a high leak value. This may sound like a fairy story and apparently there is no reason in this madness of mine at all, but it worked. I built a shield for the detector bias battery, leak and condenser and put them all in it. I also shielded the r.f. plate leads and grounded them. Presto, I can use any value of grid leak down to 5 megs. and any plate voltage from 90 to 200 on the detector and the smoothest and quietest operation ob- tain. Even with the filaments lighted with 12.5 eyele current (!4-wave 25-cycle rectified by a trickle charger) there is absolutely no hum. Normally I use either a storage battery or 25- cycle a.c. The filaments are in series. ‘Measurements with a vacuum tube voltmeter show that my Type ‘01-A set is only about a quarter as sensitive as the screen-grid outfit. That is, signals which give one scale division deflection with a Type ‘01-A will show 4 to 5 with the sereen-grid receiver. I found, however, that Type 24's are not very uniform when used for detec- tors on short-wave work. ‘Here is a stunt which the gang may find use- ful. I use an S-plate Pilot midget taken from my old plug-in Handbook outfit and also the 3-plate Pilot, connected in parallel. On the 3500-ke. band I tune with the big condenser and use the small one as a vernier. For the 7000-ke. and the 14,000- ke. bands I use the big condenser to bring the coils for these bands up to the proper point and then use the small one to tune. This way I get full-scale coverage on any band. Furthermore, I can run up to 9000-ke. and down to almost 5000-ke. with unbeatable tuning conditions.” Another experimenter, George E. Tower, W9DGJ, had trouble not with the operation of the set itself, but with noise from the a.c. line. Here is his letter ‘“T have been experimenting with a high-fre- quency a.c. receiver since I received my April QST and encountered more troubles than I could record. I cleared them one at a time until but one was left. ‘‘T was getting a weird noise that was halfway between a power leak and a spark transmitter with a rough note. Trying to detect its origin in any one part of the set proved futile. The only

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uld cure it was eliminating the a.c. ers and using d.c. on them. But I ntinue very long with a 7-amp drain y, so I tried using a Type '24 tube as | two Type '01-A’s as amplifier, using detector and d.c. on the amplifiers. very well and was free from noise. my noise must have been coming amplifier so 1 constructed an am- the one I had used in conjunction i.c. set. The noise was not there, is 1 connected it to the detector it ir. So there I was; the two segments it put them together and the little ippear. I then started anew, care- r every detail and proceeding with | to no avail; the noise persisted. I ondensers everywhere I could pos- | almost gave up the idea of ever receiver. Then I found le was really coming from the line t did not show itself readily there. I unusual types of line filters, but partially successful. this up and after trying everything | found the only thing that would ate it—a single l-ufd. by-pass nected from one side of the 2.5-volt leads to the receiver shield. The odd at the noise is not eliminated if the connected to the grounded center- lament transformer, but only when » the receiver shield.” ble that the lack of success when the connected to any other grounded t except the shield is caused by some n in the receiver itself. A good many sures taken by some experimenters to ory operation do not seem quite logi- 1 few days of sweating over a hum- ne is ready to try almost anything, essful a.c. Che Hudson Division Convention expression on every hand of the convention ever held,” the fifth il convention of the Hudson Divi- i close late Saturday, May 24th. very beginning when Dr. A. L. W v rector of the Division, greeted the dele- g peakers, until the closing event, every taken up with interesting subjects. M f the Insuline Products had a wonder- television apparatus; Mr. D. E. lelevision Corporation gave a fine elevision for the Amateurs,” and ng to him realized what progress has that particular field. It seemed good to ny old-timers present renewing ac- OST amateurs innaged by dion of the as a good vs together n legislation quaintances and with the yo taking part in the stunts so w C. E. Sargeant, W2BCA. The int« stunts between some of the lect: thing and helped to keep the { A. A. Hebert of A.R.R.L. spok and the new regulations, emphasi ug the impor- | tance of keeping within the amateur frequencies One of the surprise speakers was David Grimes, formerly a radio consultant but now with the R.C.A., who gave a most interesting lecture on “Short Wave Radio Receivers,” and if the num- ber of questions asked afterwards was any crite- rion of the interest the speaker should feel gratified. George Grammer, Assistant Technical Editor, QST, made his formal appearance as a speaker and covered the ground very thoroughly on the subject, ‘‘ Avoiding Interference with Broadcast Receivers and Other Radio Services,”’ being the concluding lecture Friday evening, but every one seemed loathe to disperse and groups were seen here and there “‘hamfesting”’ until lateinto the night. With the weather much cooler on Saturday, the afternoon session started practically on time with A. O'Hara, W20G, in charge. Clark C. Rodi- mon, Managing Editor, QS7, was the first speaker and gave a very good demonstration on how QST is printed and the trials and tribulations of an editor before the magazine is ready for distribu- tion. Mr. George Fleming, one of the engineers of Loftin-White Co., spoke convincingly on ‘“‘ Amplifiers,’’ being followed by Chief Radioman Pomranz, U.S.N.R., who discussed naval reserve and the advantages of enrolling. The big event of Hudson Division conventions is always the banquet, and this year Frank Frimmerman, W2FZ, outshone all previous af- fairs with one of the finest dinners with dance music by Ed Berlin’s Orchestra between courses. As there were more YL’s and OW's present this year, this feature of the dinner was enjoyed by a large number. Several professional entertainers kept up the interest with songs and specially dances, one of which was extremely interesting because of the fact that the performer was one of our “hams” —none other than Eddie Green (W2AKM) of the R-K-O vaudeville circuit, pre- senting his comedy act, ‘‘Sending a Wire.’’ The speakers of the evening were Director Walsh, former Director Larry J. Dunn, Col. J. B. Allison for the U. S. Army; Capt. Overstreet of the Navy, who recounted his experience when the Battle- ship Oregon made her eventful trip at the begin- ning of the Spanish-American War, and radio was unknown in those days. A. A. Hebert, A.R.R.L., and last but not least, G. E. Mears, W2VQ, who in a humorous skit presented his “1935 Transmitter.”” The Long Island City, Bronx, Brooklyn and Bloomfield Radio Clubs were present with large attendance. (Continued on page 82) the un Sir gre th on th op me col

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ateurs ed by | of the | 1 good rether slation mpor- ncies rimes, th the ire on num- crite- 1 feel ‘ditor, veaker yn the idcast ig the ry one n here night. irday, 1 time Rodi- veaker » OST of an tribu- ineers y on oman ‘serve itions ‘rank is af- lance urses t this by a Liners cially sting ne of ireen , pre- The ‘alsh, llison lavy, attle- egin- radio bert, ears, 1 his City, ‘lubs OST W9ANZ A Pioneer 14-Mc. ’Phone Station 9ANZ, owned by Louis I’. Leuck, 1718 So. 14th Street, Lincoln, Nebraska, was one of the first stations! to use ‘phone on the 14,000-ke. band when it was first opened for that purpose three years ago. Even after the privilege was rescinded, Mr Leuck was so certain that the band would once more be opened for amateur telephony that the modulator unit was allowed to remain unmolested on the operating table and ready to go at a moment's notice, although telephony was | not used in any other band. In the interim | the set was used for c.w. on the 7000- and 14,000-ke. bands, although now used largely for ‘phone on 14,000 ke. since the adoption of the present regulations some months ago. The transmitter at W9ANZ is crystal- controlled, as most of the best of the pres- ent-day amateur ‘phone stations are. In fact, as many amateurs have found from experience, crystal control is a practical necessity if the transmitter is to be really | suitable for ‘phone work, particularly on the 14,000-ke. band. Digressing for a moment, W9ANZ had his first taste of amateur radio back in 1912, with an E. I. Co. receiver and an old ignition coil. This qualifies him without doubt for a place in the roster of old timers — anyone who cut his teeth on the old E. I. Co. cat- alog is eligible! During the war he made his acquaintance with c.w. and telephony while serving in the Signal Corps, and opened up in 1922 under the present call with a 5-watt tube. Since that time the original outfit has been greatly enlarged upon. One of the photographs shows a view of the station, which is located in a sun room on the floor. W9ANZ that there are at four kinds of electro- magnetic waves making their home in the operating room — sunlight, heat in sum- mer, power QRM from three different power second SAaVS least companies, and radio waves. The trans- “a mitter is on the top shelf above the table, and consists of two units, which will be taken up in more detail later. The lower shelf holds three frequency meters of various types, one of them a heterodyne meter. The filament transformer for the transmitting tubes is sus- pended to the left of them from the upper shelf. On the table itself are the modulator, the re- ceiver, the microphone for the set, and the wire 1QST, September, 1927, page 62 ~~ ‘phone. The power supply equipment is in a separate room. THE TRANSMITTER transmitter was originally The built as a 7000-ke. crystal-controlled outfit, and an addition was made to allow it to be used on either 7000 or 14,000 ke. The two units are shown in separate photographs. The fundamental frequency of the erystal used is 1763 ke —~ ——— W9ANZ transmitter is on the top shelf, the an- vading coil and ammeter being mounted ull at the right. The lower shelf holds the frequency meters plua- ) f the receiver are also on ti shelf. On the ting table, from left to right, are the modulator unit, receiver, cabinet ¢ rds, station log, et The cup was won WIANZ during Nebraska Week competition in 1927. Un- Je or and receiver. for both transmitter \ diagram of the c.w. portion of the trans- mitter is shown in Fig. 1. A Type '12 tube is used in the erystal oscillator, and is followed by a pair of Type ‘10's as frequency doublers. Two are necessary to reach 7000 ke., because the crystal is cut for the 1750-ke. band. A double tank is used in the plate circuit of the crystal tube, one tuned to the erystal frequency, the other to twice that

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The output of the second tank is fed fier working on the same frequency juently this tube must be neutralized. of this amplifier furnishes the excita- 7000-ke. doubler, which in turn feeds

OST AuaustT, 1939 Type '03-A. When the set is to be used on 14,009 ke. this switch connects the 7000-ke. double output to the grid of the 14,000-ke. doubler which is a Type 10, the output of which excites the power amplifier on the same frequency. The COSE

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FIG. 1.— THE C.W. PORTION OF THE TRANSMITTER ariable of approximately 50-pyfd capacity ariable with approximately 100-pyfd capacity riable loet yet immersed in oil d Cardwell cut down to 6 plates , , , , \ 8 re wound into coil 244” dia., 3’ ” \ ire wound into coil 2lg dia., N 16 wire wound into coil 24%" dia., re wound into coil 24%” dia., < i” tubing wound into coil 4” dia., " tubing wound into coil 234" dia., 03-A or a 14,000-ke. doubler, de- e band being used. work the antenna and counter- re clipped on Ls, in which case the output lead from the 7000-ke. rown to connect to the grid of the Li—7 turns of 4%" tubing wound into coil 24%” dia., 244" long. Ls — R.E.L. transmitting inductance Ly — 10 turns of 3/16" tubing wound into coil 2” dia., 24” long. Lie — Enough turns of No. 18 d.c.c. wire on a 1” tube to tune to 7050 ke. in conjunction with Cu. Lu — 5 turns of No. 14 wire wound into coil 4” dia., 14 long R: — 10-ohm rheostat. R:— 5-ohm R3 — 10,000-ohm variable resistor ” Rs— 100,000-ohm —s “* , Rs — 9000 ohms Re — 100,000-ohm variable resistor R; — 100 ohms, center-tapped RFC; — 14%" long by %" dia., wound with No. 30 d.c« RFC: — 2” oo yn : 0 : RFC; — aa RFC.—14" “a” RFC; — 1" 1%” RFC¢ 1%” RFC:—e" “9G” RFCa— 4" “ “* 9g” RFC,.—5”" “ “ Ye” RFCo—i1" “ “ 2 RFC, —1" “ “gf 0 ' - co 08 J; — Closed-circuit jack for milliammeter plug. J2— Open-circuit jack for filament voltmeter plug. Js — Open-circutt jack for key plug. antenna and counterpoise are also shifted to Ll». The same '03-A is used in each case, simply being placed in the proper socket for either 7000- or 14,000-ke. work. It will be noted that the output tube always works on the same frequency as the tube exciting

ol Es tr: 4( 1€ in th ot fil SU de In pl

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, 1936 14,00 loubler oubler, eXCites 'y. The

v Ls. eng - or vays ting

AuGUST, 1930 it. Neutralization of the output tube is therefore required, but it was early found in the experi- ments with crystal control at W9ANZ that the output was much higher when the power amplifier was excited on its operating frequency than when used as a doubler — a conclusion which has been checked by many other experimenters. Efficiency and power output both increase when plenty of excitation is available. The plate voltage for the 14,000-ke. doubler is Re a — ALL — Le 0+ «00 +4 —— ae 43 oew Phen ttt

hee ‘eee ae v merrrry + LL 2+ 0+1000(8 Yr p——_aenan-+ -—— the 7000-ke. section of the transmitter is running, the oscillator and doublers take about 90 m.a., while the ‘03-A takes 125 m.a. The total load on the 100-volt part of the winding is thus 215 milliamperes, which is an overload small enough to be carried without diffi-

culty. However, the addition of an- | ts other tube would exceed the safe THE 7050-KC. PART OF THE TRANSMITTER limit, so the part of the generator The oscillator tube is on the right, followed by the two Type '10 doublers winding between the commutators, and the '03-A an plifier. The tuned choke mentioned in the text is in the which on 7000 ke. only carries the cur- tube s rent required by the ‘O3-A, is used, by the simple expedient of making the 400- volt commutator the negative terminal for this one tube, the 1000-volt tap being connected to the plate. This requires the use of a separate filament transformer, which in this special one working from the 10-volt filament supply to the ’03-A tube, and drops the voltage down to 7.5 for the Type 10 doubler. The wind- insulated for the full case Is a ings must of course be plate voltage. A 100,000-ohm resistor, provided with a sliding contact, is connected across the part of the 100-volt machine, and furnishes just to the left of the second doubler fier is furnished by the drop through the 9000-ohm resistor in series with the key jack. The method of the obtaining bias for the 14,000-ke. doubler has already been explained. Two different keying arrangements are in use, one for each band. When operating on 7000 ke. keying is in the grid circuit of the power amplifier, and the key is shunted by the grid leak and a l-ufd. condenser in series. This system gives almost clickless keying even when the receiver is operated on the same frequency as the trans- eliminates all BCL mitter, and completely

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trap tuned to the operating fre- ed in the lead from the grid to the m to the usual form of r.f. choke. the key is placed in the lead from enter-tap of the doubler tube to the of the 400-volt supply. This corre- rdinary center-tap keying. The bias on amplifier is sufficient to reduce its to zero when the key is up and exci- ved. With this keying method no emitted and key clicks are negligible. MODULATION tion system at W9ANZ is the im- ng arrangement in which the modu- perated at a higher plate voltage ‘(MPLIFIER AND MODULATOR microphone transformer is just behind the side of the panel. Some of the im- the text can also be picked out in this lulated amplifier. The modulator he more common system used to ob- ercentage of modulation, however, tage booster is used instead of a stor vantages result from this. No power is ropping resistor, for one thing, and operated at the same plate voltage ind ‘phone without the necessity of nections. The ’03-A is operated at he nominal rating, in both cases. booster is a power pack which fur- of this system is given on page 46, ~) OST AvueGust, 1930 nishes 300 volts at about 75 milliamperes. The output of this power pack is connected in series with the plate supply generator, making a total of 1300 volts available for the modulator tube. The booster employs a transformer and Type ’80 rectifier, with the filter shown in Fig. 3. Since the negative side of the booster power supply is at 1000 volts potential above ground, the insulation of the transformer must be sufficient to stand the full plate voltage. A further consideration in the design of this particular transformer is that the capacity between the primary and secondary windings must be low in order that voice fre- quencies will not be by-passed to ground during modulation; for this reason the two coils are wound on separate legs of the core. The filament winding for the ’80 rectifier is small and its ~apacity to the primary is negligible; therefore this winding is put on the same leg as the primary. The modulator tube is a UV-211, which gives good results when working into the load furnished by a Type ’03-A, and is more suitable than an- other '03-A would be for this purpose. Since the transmitter was built other types of tubes have been made available for modulation purposes, but the results with the present layout have been so satisfactory that the old tubes have been re- tained. A Type '40-high-» tube is used in the speech amplifier, and has given very good service. It is impedance-coupled to the modulator tube through a combination of inductances which has been used for a very definite purpose — namely, 4 THE 14,000-KC. DOUBLER AND AMPLIFIER A Type '10 is used as a doubler and a Type '03-A as power amplifier. The neutralizing condenser is in the center fore- ground. to obtain high inductance without at the same time increasing the distributed capacity, which is always troublesome when a single high-inductance coil is used, and is likely to cause a resonant con- dition in the voice range which will result in bad distortion. A 30-henry choke and the secondaries of two audio transformers are connected in series in the ple au all for thi dif an an tra Th 37 the spe I-p per mo bu sec d.c gel pai bu mi of mil it i Wol one ant mo har

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L930 The eTies tal of The > ’80 e the is at ation 1 the 1 the | the dary fre- Iring are nent 1 its fore lary. rives shed | an- » the have but Nn 80 re- eech It is tube has ely, ume h is nce ‘on- bad two the Auveust, 1930 plate circuit of the speech amplifier tube. The audio transformers are rated to carry 10 milli- amperes in their primaries, and since the trans- formation ratio of both is 3 to 1, it was judged that the secondaries would carry 3 mils without difficulty. The actual plate current is 2 to 2!4 mils and the transformers have carried this without any sign of burning up. The primaries of the transformers are left unused to avoid saturation of the core from the d.c. plate current. The plate voltage on the Type ‘40 is 370 and, surprising as it may seem, the tube handles it nicely. The coupling condenser between the speech amplifier and modulator is a l-ufd., 1000-volt condenser. The im- pedances in the grid circuit of the modulator are also audio transformers, but in this case both primaries and secondaries are used, since there is no d.c. flowing and consequently no dan- ger of core saturation. The microphone is constructed from different mikes. The OST 47 THE RECEIVER A diagram of the receiver is shown in Fig. 4. The set uses a Type ’01-A regenerative detector, A Type ’40 in the first audio stage, and another ‘O1-A second audio. Impedance coupling is used between the first and second audio stages The regeneration control is a variable resistor in series with the detector plate battery. In addi- tion to the usual r.f. by-pass between the battery parts of three FIG SPEECH AMPLIFIER, MODULATOR, AND VOLTAGE button was taken from an aeroplane BOOSTER microphone, the carbon granules from = Li-s — Couplir y impedances. See text for description a desk-type mike, and the remainder ; rs filter choke of the parts from still another desk 7. — /3-jenry mike. Before assembling, the button Ly — Enough turns of No. 18 d.c.c. wire on 1” tube to tune to 14,100 ke. and granules were thoroughly cleaned om congunation wen © with carbon tetra-chloride. This com- = — 1008-c08 condones: posite microphone has given very ¢;—3 yfd good results; it is a great deal like an C:— 2ufd aeroplane mike in that it picks up - ee _— very little background noise, and is 7, — Agjerophone transformer. See tert for description sufficiently sensitive in conjunction 7T:— Pow: nsformer for voltage booster. 300 volts each side of center- with the speech amplifier, since the tap on high-voltage winding. This transformer must be insulated modulator tube can be easily worked re Fag | gouache, ee ey ee to full output The milliammeter in the plate circuit of the specch amplifier reads The modulation transformer was — 0-10; that in the late circuit of the modulator, 0-150 home-constructed by utilizing parts from an old Ford coil. The core was sawed in half, and 250 turns of No. 26 wire wound on it. One of the secondary coils from the Ford coil was slipped on top of this winding and serves as the secondary. A trap tuned to the operating placed in one of the filament leads to the modu- lator tube to prevent radio-frequency feedback into the modulating system. When this trap is frequency is correctly tuned there is a noticeable decrease in the plate current taken by both the modulator and speech amplifier, proving that some r.f. gets back. ANTENNAS 3y means of three antennas of different lengths it is possible to get a number of combinations for work in any amateur band. One is 15 feet long, one is 45 feet, and the third is a two-wire flat-top antenna 75 feet long. Ordinarily the second har- monic is used for 7000-ke. work, and the fourth harmonic for 14,000 ke. side of the tickler and the filament, a variable condenser is placed in parallel with this by-pass condenser and serves as a vernier tuning con- denser or beat-note control. A pure d.c. signal occupies about 25 degrees on this condenser dial. The grid tuning condenser is in series with a small fixed capacity for band-spreading, and the fixed condenser may be short-circuited by a small switch to increase the tuning range. The Type ‘40 tube in the first audio stage lends itself well to peaked audio amplification, and a tuned impedance is therefore included in its plate circuit, in series with an audio-frequency choke which serves as a coupling for straight audio amplification. By means of a two-point switch, either impedance may be short-circuited, thus selecting either peaked or quality amplifi- cation. The tuned impedance peaks at 770 cycles, and when in use a pure d.c. signal occupies only about two-thirds the space on the tuning dial that it does with the straight amplification.

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THE FREQUENCY METER e diagram of the heterodyne fre- ter. This meter is calibrated from juency transmissions, and covers the 6600 to 7600 ke. All batteries are con- +} OST Avuaust, 1939 opened, removing the filament voltage from the speech amplifier and modulator, and at the same time causing a relay in the power-supply equip. ment to open and disconnect the primary of the transformer, which in_ effec opens the plate circuit of the modulater voltage-booster and removes it from the circuit. The - a relay for this purpose is constructed a | 1s from an old 150-ohm telegraph relay re) The coils were connected in paralld . {Ym wer =! instead of series, and it was found that ' 3, . se 10 volts a.c. was sufficient to operate . the relay satisfactorily. The relay coils eet i 3 are connected across the modulator Rss | OL *] filament switch, and when the switch Hl =, is closed the relay is not energized, the 7 contacts being closed in this case. When ] ] ; } the switch is open the full 10 volts is — as Bia ual across the relay, as the impedance of FIG. 4 THE RECEIVER the modulator tube filament is negli- Ls — Ford secondary coil. Inside gible compared to that of the relay, and space is filled with core the contacts open. seenee a acta ainebies eiiicaiaiie W9ANZ hardly needs to be intro removed duced to anyone who does any listening Ri — 10 megohms on the 14,000-ke. band. When condi- Re — 4 megohms tions are favorable, it is possible to hold it = sa megohm rariabl = perfectly satisfactory QSO’s with both Rs — 30 ohms. coasts and Canada. Reports of * perfect Re — 4 ohms modulation,” ‘‘ perfect reception,”’ and plug-in cette a 4 enme “100% readable’ have been received arious ama- T Audio transformer. J — Filament control jack. and a filament voltmeter is in- for adjusting the filament voltage to The tube is a Type 99. , did not mention the other frequency wn in the station photograph, but uppearance it is probable that they are orption type. e DOX, value. OPERATION rious filament voltages and plate cur- neasured with the same meters wher- e by utilizing plugs and jacks. The gement of the jacks and the various own in the diagrams of the trans- om one band to another can be ac- in a few minutes. It is simply neces- e the ‘03-A in the proper socket, untenna clip from one pick-up coil ne the antenna condensers to pre- tings, transfer the output of the ler to either the 14,000-ke. doubler 0-ke. output stage as the case may be, tank condenser of the 7000-ke. dou- arked value. The key is, of course, the proper jack at the same time. nging from 14,000-ke. ’phone to c.w. S, Fig. 2, is closed, thereby short-cir- e modulation choke and the filter in the modulator diagram is then 75% of the time, even through QRM. Up to the time of this writing contact has been made with 25 foreign countries on ¢.w., and the 14-me. ‘phone has been heard in Brazil, TYPE 99 wees a “the a N oy Med as|a| a FIG. 5. — THE HETERODYNE FREQUENCY METER Li 14 turns of No. 22 d.c.c. on tube base. le —Sameas ly Ci-2 — Twe-gang condenser with 5 plates, double-spaced, ™ each section, C3 - 2000 jpfd Ry - 60-ohm rheostat. Mexico, Chile, Peru, England, Prince Edward Island, Mexico and Spain. ‘Phone QSO’s have been established with some of these. (Continued on page 86) ho thi son anc hat con chi har less me eX} ) sar ma fan of : unc 28- tior DX

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1936 m the ’ Same Pquip- of the effect ulator The ructed relay arallel d that perate y Coils ulator switch dl, the When olts is nee of negli- vy, and intro- tening condi- Oo hold 1 both verfect ”” and ceived QRM. ontact n ¢.W., Brazil, — ETER ace d, ™ dward ; have Aucust, 1930 a e Devoted to the interests and activities of the INTERNATIONAL AMATEUR RADIO UNION President: H. P. Maxim Vice-President: C. H. Stewart Secretary: K. B. WARNER Headquarters Society: Tue AMERICAN Raprio Retay Leacvue, Hartford, Conn. MEMBER American Radio Relay League Asociacion E. A. R Associazione Radiotecnica Italiana Canadian Section, A.R.R.L. Deutscher Amateur-Sende-und Empfangsdienst Experimenterende Danske Radioamatorer Nederlandsche Vereeniging voor Internationaal Radio- amateurisme SOCIETIES New Zealand Association of Radio Transmitters Norwegian Radio Relay League Radio Society of Great Britain Reseau Belge Reseau Emetteurs Francais South African Radio Relay League Wireless Institute of Australia Conducted by Clinton B. De Soto E are becoming overwhelmed with the increasing preponderance of 28-mc. ma- terial in the individual reports that are sent into this department as especial contribu- tions, along with WAC Club applications, and hidden in other and more general correspondence These individualistic, personal reports are greatly appreciated, and many times result in valuable and interesting items. But lately they have con- cerned themselves with little but 28-me. stuff, and inasmuch as there are other places in QST where a special department on international ten- meter work would be more fitting, we can make no further acknowledgment or use of them than this general expression to all contributors. A study of the material received brings out some most interesting points. 28-me. work is more and more becoming a de-nationalized and inter- national affair. The use of this band for practical communication purposes is now found to exist chiefly in those countries where general traffic handling is prohibited or limited. Whereas in the less restricted areas experimental and develop- mental work on this band is confined to certain experimentally inclined persons possessing neces- sary talent and equipment, and who in most cases make use of the better developed and more familiar bands for ordinary communication, a lot of amateurs in those unfortunate places where undue governmental restraint is exercised use the 28-me. band exclusively for all their communica- tion. And they are getting a very fair share of DX QSO’s too. This leaves us in a position to ask, who is going to be the first to achieve a special 28-me. WAC Club membership? We obviously cannot insti- tute many different grades and classes of member- ship in the WAC Club, and must normally con- i | LOCAL MEETING OF THE RESEAU BELGE, MAY 2, 1930 WS3SAVK is in the middle, near ON4F M, who is in the golf breeche Between the two Catholic priests is ON4BZ, the Namur District Manager (where the meeting was held) Paul de Neck, ON4UU, is at the erreme right, and ON4PI at the extreme left tent ourselves with the single exception of the WAC for phone, but if it will add a little incen- tive to this work we will be happy to honor the first application received for WAC for 28-me. as a special and extraordinary event. How long will we have to wait? WAC for phone certificate was issued to Hilton L. O’Heffernan, G5SBY. He considers himself doubly honored in that his is the first such certi-

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ISSU ed to a British station. The last * QSO occurred April 19, 1930. forwarding Bureaus maintained by r organizations of the world are a sys- ( l proc eral ntir ant it ion odperative, performing a great luctive of much good to amateur Linking units are found in every rental area, and in nearly all the ries permitting amateur two-way The work they do is worthy of eartfelt thanks. he g omparatively large numbers, and it g ti hy. ry lobe still remain where amateurs 1e new and unlisted stations in mail that difficulty is experi- request to amateurs residing in s to do themselves and their fellow Trea t service by volunteering to re- yrward wherever possible communi- for stations in their areas. May inteers for this service’ All present igen cies have been listed in QST BELGIAN SECTION ck, President of the Reseau Belge the habitual European contracts, DX on the 7-me. band, the princi- rol ind near 43 meters where all our ussemble and hold long conversa- Lin, rece France, Italy and North Africa yrds in low-power ‘phone work ON4WY, with 16 watts in a push- choke modulation, was in con- \N of Rio de Janeiro on 42 meters ls ignal was received R5. ON4QS vatts was heard R7 on 52 meters by band DX is always good with f some dead spots w here none but 1 ON ypold rs ON4CAA and about 100 watts in- 1) ke. His first contact was with th I ‘ R4 vere 7 is tations are received {BU is now working from Kal- ville, in the Belgian Congo, with ‘8! The next was W4MKk, who \fterward the following Belgian worked: ON4JC, ON4AUU, iEP, ON4AWW and ON4ZZ. one R » glorious day worked the fol- r2B (R6), FBSPHI (R8) of Mada- R7) and VS6AF (R5) of Hong- ymntacts were made with 20 watts pelin type antenna, and took place in m 1800 to 2000 G.C.T ni rht J3CF and J3FR are now heard | (2400 G. C. T.) the Japanese band nothing has been done yet, lgian hams are preparing their ©] 4 ine tests. OST Avuaust, 193) Sunday, May 4th, we had the pleasure of , visit from a good U.S. ham, W3AVK of Philadel. phia, Pa., who together with severa] Frenchies came to a local meeting we held in Ciney (Namur district DUTCH SECTION By W. Keeman, Traffic Manager N.V.I.R. Reception generally has been poor this month In most cases, however, those stations which were heard were easily worked. On the 14-me band conditions for VK and ZL communication were far worse than last month. During the night South Africa comes in regularly with good strength, and most countries of this continent have been worked by our membership. Good ‘‘W”’ conditions existed on May Ist, 2nd and 3rd. On the other nights practically no “W”’ signals came through. The writer notices that during the last half year “W's” could be worked during short periods of a few days, separated by intervals of about 26 days (one revolution of the sun). In easterly directions only a few outstanding contacts have been made, but still several new Dutch stations have worked their PK countrymen, while PA@ZI worked China. On May 3rd PA@DW, our well-known DX- station, worked all continents; PA@QF established this record some time ago. On 2S-me. the first PA-W contact was made by PA¢QQ on May 16th. As to DX, 7-me. was a complete washout The news that the British Postmaster-Ceneral had opened the 3.5-me. band to the English ama- teurs was received here with great satisfaction Practically no difficulty now remains to prevent the I.A.R.U. from putting into action the uni- form regulations for the use of the several bands, as proposed by our traffic department about two years ago and brought tothe attention of 1.A.R.U Headquarters by the hk. E. IF. The general complaint of hams working in the 3.5-me. band is the small number of foreign stations working there. Still PA@QQ reported several good contacts, his best DX being Petrograd in Russia. Much trouble is caused by several commercials working inside our bands, i.e... FYA, FYZ, PPX, PL, RKV, RVA and IDO. PPX has even announced himself as being on 43 meters while actually working on 7,180 ke. A beginner hearing such an announcement and considering it correct, would regard it as a standard, thereby resulting in off- wave operation, interference with official trafhe and a complaint to the Berne Bureau protesting against ‘“‘those amateurs’’ working outside their bands, thus risking further restriction at Madrid. When RKV and RVA are both working, the greatest part of the 14-mc. band is covered with their broad r.a.c. or super-regenerative signals, backwaves and clicks. If possible something ought to be done about this matter. As no traffie nued nm page «) Con J i 1 Mas May cath date pylo prog then usua of tl follo Tl No trans circu Wil WIB WID by W modi 6 an wae « pers The 7% \ and 4 was | three Th in he used | cover: flag a to ho had t The found mw 2 WI10! were report the pl from WIDI okay. the pl: Stand vould calling WIOF reports In a ther j the Fie will pli work | tulty s emon

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1930 of a adel. chies Amur R. onth vhic! 1-m« atior night good inent Ist ly ho otices ld be days, one ; only » but orked orked 1 DX- lished first May shout neral ama- ction event > unl mands it two RU neral and is yrking itacts, Much yrking PLJ, unced tually ich an would in off- traffic esting » their adrid. g, the i with ignals, et hing traffie

Aveust, 1930 F. E. Handy, Communications Manager E. L. Battey, Asst. Coms. Mgr. 1711 Park St., Hartford, Conn. The Springfield Air Races The dedication of the new Bowles Airport at Springfield, Mass., was the occasion of the Springfield Air Races held on May 30th, 31st and June Ist. The Springfield Radio Asso- ciation had been approached a few weeks prior to those dates to furnish radiophone communication between the pylons and the timing stand for the purpose of reporting the progress of the planes around the course, and for checking them to see that they did not “cut off’’ at the turns. As usual, the amateurs were not found wanting and at the start f the races the stations which we shall describe in the following paragraph were in operation The control station, located at the Timer's Stand (Pylon No. 1) used the call WIOF. This station used a combined transmitter and receiver with the tuned plate-tuned grid ircuit. Cushing, WIA WW, was operator at W1OF. Station WIDE was located at Pylon No. 2 with WIBVR, WIBS], WIBSN and WICCH as operators. The equipment at WIDE consisted of a portable transmitter-receiver owned by WIWP; the transmitter being a 15-watt affair using grid modulation, 540 volts of “‘B"’ batteries feeding the tubes and 6ampere going into the antenna. A frequency of 3510-ke. was chosen for WIDE. At Pylon No. 3 was stationWl1AWW, perated by WIDR, WIBSN, WIBVR and WICCH. The outfit at WIAWW was a Baby Burgess split Colpitts 7% watt transmitter with storage battery filament supply and 450 volts ‘“‘B" batteries on the plate. Loop modulation was used on approximately 3505-ke. The receiver was a three tube job using Pilot coils The pylons were made of wood and were about thirty feet n height, shaped like pyramids. Four by four timber was wed with boards nailed across lattice-like. Each pylon was overed with black and yellow bunting and had a checked fag at the top of the mast. At each pylon a tent was put up to house the station assigned at that point. Special tables had to be constructed in the tents to hold the equipment The first day of the race coéperation, Friday, May 30th, found all the stations in readiness. The weather was cold, mw and very windy. WIDE and WIAWW contacted WIOF at the Timer's Stand every fifteen minutes. Races were reported at 4 p.m. On May 3lst three races were rported. W1OF, the control station, would announce when the planes had left on a race and then stand by for reports from Pylon No. 2. As the planes went by Pylon No. 2, WIDE would call out the numbers of the planes passing kay. Reception was so good that the roar of the motors as the planes passed the pylons could be heard at the Timer’s Stand. After the planes had passed Pylon No. 2, W1IAWW vould begin reporting them as they passed Pylon No. 3, alling off the numbers of the planes passing. After this WIOF would O.K. the reports received. Four races were rported on Sunday, June Ist In addition to the regular reporting of the races several ther interesting things happened during the three days at the Field. The New Arbella, KHIJQ, the Boston Herald good vill plane, visited the field and arrangements were made to vork KHIJQ in the air. Contact was made without diffi- ulty and after the ability of receiving the plane had been #monstrated the mike was turned over to the regular an-

OST Department

i eS ~

nouncer on the ship and the receiver was in turn plugged through the loud speaker system at the airport. The an- nouncer on the Arbella talked to the audience for about fifteen minutes while flying 3000 feet above the ground The wind became so strong on the last day of the races that Pylon No. 3 was blown down. As the antenna-coun- terpoise system of WIAWW was fastened to the pylon, it also came down and rested on the ground. WIAWW< still got through but reports were very weak. This condition did not last very long, however, as two of the operators immediately went out to correct the situation, one holding the antenna up with a pole and the other the counterpoise You can’t stop a ham! Hi. All in all the Springfield Radio Association's coéperation at the Air Races was a decided success. Each member took a personal interest in the work, and the resulting spirit of unity has tended to make the SRA 100% stronger. The above report is furnished through the courtesy of r. F. Cushing, WIAWW, Percy C. Noble, WIBVR and Harry Fisk, W1DR. Thanks are due the National Carbon Company, the National Guard, the Wetmore-Savage Elec- tric Supply Company and the B. H. Spinney Company for apparatus and supplies furnished. DAIV The schooner yacht Mopelia has left New York carrying a party of fifty boys on a two months’ cruise through the West Indies. J. Pascal, W2CEV-—W9AQD, is radio officer in charge of the 100-watt high frequency installation aboard which will operate under the call DAIV. DAIV is expected to have frequencies adjacent to our 3500-, 7000- and 14000-ke. bands, but the only definite frequency known at the present time is 6667-ke. (45-meters There will be plenty of traffic and Count von Luckner, owner of the Vopelia, is offering a cup to the amateur radio operator who gives the best service in providing communication with the he cruise offers a splendid opportunity to show what we can do and all amateurs are urged to listen for DAIV on 45-meters and coéperate in every way possible. yacht Traffic Briefs Send for the 15th edition of the Rules and Regulations of the Communications Department. This con- tains the full text of the new amateur regulations, lists of Q code, international prefixes, information on the qualifica- tions and duties of different officials in the A.R.R.L. field organization, how elections for Section Manager are held, ete. A postal will bring you the latest up-to-date edition of this information for your operating table free of charge. Mail it today. June, 1930 first Canadian “five’’ to work all con- velieves he is the second in Canada to do VES5AW is the tinents. He also t this. FB,OM!

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1A eral transcontinental traffic routes now in ng W1KH and W2SF to WSCNO to } to WOBOQ to W9FAM to W9CAA to +} o te h of this route connects W9FAM and e stations on the route have numerous Zz quite an extensive hook-up. that China has lost two good amateur has been closed by military authorities down permanently when the owner re- BEACH AIR MEET Associated Radio Amateurs of Long is the following account of communi- the A.R.A. at the Long Beach Air ng Beach Municipal Airport on May eeting of the club on May 23rd Hal vas appointed chief operator, and Foster sison officer. Early Saturday morning all place a 50 watt M.O.P.A. at the ted without an antenna; a 744 watt 1 operated with what amounted ran antenna; a 714 watt Hartley at Zepp antenna and a Ford Coil plate att T.P.T.G. with a Zepp at Pylon working order and had been well race at 1 a.m. Saturday, May 24th ntinuous operation all day Saturday ng communication between the pylons i. The operators were as follows: At 6HT and WtDEP; at Pylon No. 1 W; at Pylon No.2 W6CZZ and W6DYZ; CHW and WHEII highly spoken of by Army, Navy and work of its members at the Long Official Broadcasting Stations iEs AND ADDITIONS , Wed., Sat., 7:00 to 7:25 pt Sat., 7550 to S000 p.m.; 700 ke 100 ke.) Fri., 0:20 to 9:35 pa Z 14200 ke ce Daily weso p.m., ne) Mor rhurs., Sun., 10 p.m es Thurs., 7 0 pu pprox M , Wed., Fri., 7:00 and 1 14,500 ke Wed., Fri., Sun., I I «. Sat. 700 S30 WI1MK ters’ Station WIMK operates on ind 7150 ke. Robert B. Parmenter, perator; his fist is familiar to most of casionally other members of the perate at W1MK. Their personal signs RA Section of QST schedules Eastern St andard D SPECIAL BROADCASTS sent [ T , Th I S . Tues., Thu iTION periods have been arranged to e to communicate with A.R.R.I neral periods have been arranged so broadcast. They are listed 100 ke. and 7000 ke. to indicate to listening on the SO-meter OST AvGustT, 1930 3500 ke 4 8:10 p.m. to 9:00 p.m. on Sun., Mon., Tues., Thurs., and Fri 10:00 p.m. to 11:00 p.m. on Tues. and Thurs. (No OBC sent before these periods.) 12:00 p.m. to 1:00 a.m. (or later) on Sunday night Mon- day morning). 7000 ke 10:10 p.m. to 11:00 p.m. on Sun., Mon., and Fri 12:00 p.m. to 1:00 a.m. on the following nights (actually on the norming of the day following): Mon., Tues., Thurs, and Fri. (Only on Tues., and Thurs. does the OBC precede these periods. ) SCHEDULES are kept with the following stations through any of which traffic will travel expediently to 4. R.R.L. Headquarters, on 3500-ke.: WIACH, WIAPK. WIBXB, WICTI, W2JF, W2WK, W3BWT, W3CBT, W4PM, W9OX, VE2AC; on 7000-ke.: W6AIX, W6DEP The New Arbella—KHIJQ The seven-passenger monoplane New Arbella left Boston in early April on a tour sponsored by the Boston Herald in connection with the 300th Anniversary of the founding of the Massachusetts Bay Colony and the forthcoming Ameri- can Legion Convention. The plane was equipped with a 100-watt radiophone-c w. transmitter operating on 3106 ke. (96 meters) with the call KHIJQ. Huddleson, WSDBI was the operator. Amateurs were requested to listen for and report broadcasts from KHIJQ, and we are here giving a brief account of work reported to us by various amateurs W9EVE heard ‘phone transmissions from KHIJQ for twenty minutes after the plane left Milwaukee and CW until arrival at Madison April 26 W9CPD, St. Paul, heard the plane while flying between St. Paul and Des Moines, lowa. Strength of signals was between K6 and RY on both ‘phone and CW. W9GHO, Min- neapolis, worked KHIJQ for forty-five minutes; reported signals QSA5, RY, p.d.c. Cphone and CW). One message was relayed during this QSO April 27 WYHD worked the Arbella en route to Lincoln Neb., from Des Moines QS80 was established t 1003 a.m. C.S.T. when KHIJQ was7 miles east of W9HD. Strength of signals at that time was QSA5, RY (phone). At 10:25 a.m, dis tance Was 25 miles and audibility QSA3, R5 (CW). WYHD says that KEIJQ’s signals were marked for their steady frequency and good modulation April 28 rhe New Arbella arrived at Topeka, Kansas. Ar- rangements were made with W9FLG to keep a watchon KHIJQ’s frequency until they reached Kansas City Transmissions from the plane were followed until just before it landed in Kansas City and two messages were received by W9FLG, one for the local Legionnaires and one for the Chamber of Commerce KHIJQ’s CW signals were QSA4-5, while the ‘phone could not be copied May 3 WSOW heard KHIJQ communicating with WSXK en route from Pittsburgh to Washington, D . May 10 WIMK worked KHIJQ en route to Hartford from Newark, N. J., and exchanged messages relative to a hook-up with WTI WTLC was m: iking plans to rebroadcast transmis- sions from the Arbella upon its arrival in Hartford. W1LAQOX and WICRN heard both sides of the QSO between WIMK and KHIJQ. The New Arbella landed at Hartford. WIAVK ar- ranged schedules with KHIJQ for 11 a.m. E.S.T., May 11th, when the ship was to leave for Providence May Il WILAVK worked WICRN at Fall River, Mass. who requested that KHIJQ be informed that he would wateh for the Arbella as she neared Providence. KHIJQ got under way at about 11:10 a.m. E.S.T. and called 7 1IAVK. It was found that WLAVK’'s receiver would not tune to 3106 kc., so station WLAOX was used. WIAOX held a two-way ‘phone QSO with KHIJQ until the plane was about fifteen miles away, when WIAOX changed to CW. The plane used ‘phone all the way to Providence. Contact was held with WIAOX until they had passed over Providence. WI1AOX was then asked to stand by and KHIJQ tuned around to see if other hams were calling WICRN was heard and worked. At KHIJQ’s request W! AOX sent broadcasts on ‘phone and CW to all amateurs telling them of the Arbella’s proposed afternoon flight over Rhode I+land and Eastern Massachusetts. At 1:40 p.m. WIBXB heard KHIUQ working WICRN, audibility QSA5, RS, modulation good WIBNB heard the plane again Q8O WICRN at 3 p.m., location then over Fall River. At 3:15 p.m. KHIJQ sent a general call for Taunton, Mass., signing off at 6000 ft. reeling in antenna and getting ready to land there for one hour. At 5:08 p.m. WIBXB again heard KHIJQ, QSA4, R6, calling WIAHB and saying he was nearing Hyannis, Mass. WIAXV heard KHIJQ while en route from Pawtucket, R. I to Hyannis, Mass working WICRKN. WILAXYV worked KHIJQ on ‘phone all the way from New Bedford to Hyannis. KHIJQ landed at Hyannis May 12 WIAXV was in continuous communication with the plane while flying between Hyannis and Providence, and be- tween Providence and Brockton, Mass. WILAX V handled a rus message to the Boston Herald. May 13 WILAXYV heard the plane leavin “nee, \1ass for Lowell. WLAKY and WLWX worked KHIG. W LAXV fol-

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1930 s., and » OBC Mon- tually Thurs, recede ‘ations tly to LAPK iCBT, iDEP Y Soston ud In ling of \meri- with a 3106 ‘DBI © and ving a teurs Twenty ival a flying ils Was Min- signals elayed incoln us. Ar- {1JQ’s issions \ GNSAS for the merce ild not VSXK i from vok-uf nsmis- X and K and I K ar- 11th, Mass watch pr way found ‘tation ) with Aveust, 1930 lowed the roadcasts from the Arbella as far as Manchester “. H., but could not follow the trip to Concord May 14 KHIJQ left Concord at about 11:20 a.m. E.S.1 and immediately called WIAPK on ‘phone, and two-way com- mun n was established. When the plane reached the Maine- N. H.t ndary line. WIAPK changed to CW because KHIJQ could not copy his ‘phone through the QRM from the plane's engine. KHIJQ and WIAPK were in communication until the plane neared Portland, Maine © > . Traffic Summaries MAY-JUNE) Pacif d by Los Angeles 8206 Centr d by Llinois ZSS6 Atlantic led by Western Pennsylvania 2219 New England led by Connecticut IS33 Southeastern led by Florida 1551 Hudson led by Eastern New York 1255 West Gulf led by Northern Texas 15S Northwestern led by Montana 660 Dakota led by Southern Minnesota 655 Midwest led by Missouri ( 2oanoke led by Virginia 4 Delta led by Tennessee 278 Rocky Mountain led by Utah-Wyoming 166 Que bet “4 Onta ) ; Vanalta led by British Columbia 29 Prairie led by Manitoba i7 530 stations originated 5798; delivered 4334; relayed 11,609 total 21.741. (74.7% del.) \-~ i ' —_% } “Se The I Angeles section continues to set the pace and once ag 1ims e Traffic Banner. This Banner goes each month to the section with the largest total of real messages. A traffic sum! y showing the standing of the various divisions for the past montl s printed above What place does yours take? What Section will carry the Banner next month and help its Div n head the list? OST BRASS POUNDERS’ LEAGUE ul { Del, Rel Total K6EWB 223 55 758 1036 W9YDZM IS6 17S {6S R32 KAIHR 238 153 306 697 W6QP u7 ia 16S 637 W6BTZ 36 a) S04 49 WIMK 410 67 10 426 W6ORZY 35 10 es | 416 WSYA S3 65 256 404 W3BWT U5 105 ISS SSS W4PM I Is 358 377 W2QI 138 Is4 6 328 WesCcos S4 US 146 328 W3SM 43 56 223 s22 K6DUD 259 t2 14 305 W6WA S2 211 7 300 KOBAW 05 S ISS 201 W6DTI 144 34 lo 282 WICMZ 1S IS 242 275 W6DEP 21 17 201 269 W6ALI 6 14 248 268 W6AOA 6 57 104 257 W6YG li4 12 10 256 W6AWY 2 56 ISS 241 WIAMQ 7a 20 5 233 WO6OANY 15S > 123 2i2 W6EGH il 12S 100 W2QN 64 io 2 141 WYDRG 38 4 6 10S WYCEL bt] oo 12 SI All these stations appearing in the Bra Pounders League are noted for their consistent schedule-keeping and dependable message-handling work in amateur radio. Special credit should be given to the following stations in the order listed responsible for over one hundred delivertes in the message month: WOWA, W2QU, W9DZM, KAIHR, W6RhGH, W3BW'T Deliveries count! A total of 200 or more bona fide vessages handled and counted in accordance with A.R.R.L. practice, or just 50 or more delirertes will put you in line for a place in the B.P.1I Why not make more schedules with the reliable stations you hear and teps to handle the traffle taat will qualify you for B.P.L. membership also”? tuke DIVISIONAL REPORTS ATLANTIC DIVISION ESTERN NEW YORK SCM, John R. Blum, WsCKC WSBCZ leads the list this month WSCUT has built several screen grid a.c. receivers that work very well. WSAFM reports the off-frequency sit- uation much better on 14 mc. WSAAZ is having filter trou- ble. WSIH has a new 851 for his high powered phone trans- mitter. WSDSP has increased power to an 852. WSCKC is monkeying with 28 mc. WSBWE took exam for ensign in U.S. N. R. WSBDYV isin Brooklyn for U.S. N. R. training WSBFG is honeymooning. WSDME is busy with schedules WSQL is working with twenty watts input. WSBCZ is work- ing in a B.C.L. station with his new commercial license WSQP is a new Official Observer. The Jamestown Amateur Radio Association is now affiliated with A.R.R.L. WSAWM has a new license. QLC is a new Q signal up this way WSBHK reports weather very poor for DX. WSCXH is trying out standard frequency work. WSCW is off the air until fall. WSDIL is having trouble with his receiver W*CPC spends most of his time on 14 mc. Two new sta- tions started up this month WSCIL and WSAST. There are exactly 100 Official Relay stations in this section, 14 of which reported. Several fellows want Official Relay appoint- s, but the section is getting top-heavy. All Official Re- lay stations that do not report by September will have their certificates cancelled. Sorry, but you will do it yourself Traffic: WSBCZ 50, WSBYD 42, WSCPC 20, WSDSP 20, W9DME 12, WSQL 10, WSAAZ 8, WSDII 5, WSCSW 5, WsC Ke WSAST 2, WSCXH 2, WSBIF 2, W&CIL 2, WSIH 2, WSBHK 1. MARYLAND-DELAWARE-DISTRICT OF COLUM- ment BIA SCM, Forrest Calhoun, W3BBW rhe summer slump has set in for sure as there was a large number of non- reporters. You know, fellows, you must report even if you don't have any traffic. Let’s see if we can't get more reports next month. Maryland: W3AFF, our new ORS, says the QRN is bad during day and worse at nite. Hi. W3AIL, also complains of QIR.N and lack of traflic. WiBBW had a few but not so good as last year, W3k- D says now that school is out he can report more often. W3LA was QSO his home while he was in a plane over Detroit with only 3 watts input. F.B. W3DQG says summer and yl-itis have him. Hi. W3NY wasatthe Radio Show in Atlantic City. Delaware: W3AIW will soon be an ORS. W3HC did his bit to help. WALA) doesn't get on much due to hot wx and bass fishing. District of Columbia: ur good traffic station W3BW'l W3BF sent in his last report for our section and is now heard at W3GS in the E. Pa. section. Sure sorry to lose you, Jack. W30OZ finds traffic harder to get and skeds harder to keep. W3PM has a new AC receiver. WSAKK is going to put in an entirely new station. | have been requeeted to ask all amateurs in Maryland and District of Columbia, who are in- terested in A.A. work to get in touch with me or the Chief gnal Officer, U. S. Army 3rd Corp Area they are organizing a chain and need your codperation, leads us all as usual. Baltimore, as Ilere is a chance to get traffic and skeds lraffic: W3BWT 388, W3BF 58, W30Z 33, W3AIW 20, W3HC 8 WS3AFF 5, W3AIL 5, W3BBW 5, W3ED 4, W3PM 4, W3LA 3 EASTERN PENNSYLVANIA SCM Don Lusk, W3ZI Now that hot weather is here and DX or traffic work are not so good let's turn our efforts t« ward bettering n for the coming radio season, by straightening our stat out the bend or chirp in our note, cahbrating our monitors and frequency meters and getting all set for good WX, so hat you will be a credit to both the League and our section We have an several prospectiv little or no trouble winning the traffic banner. The SCM is proud to welcome home the traffic hound, W3GS. W8CWO seers to be bothered with tennis, spring fever or what have you. Mise W3AKBE has at last succeeded in getting a 14- megacycle Xmtr perking and now she’s after DX. WSEU ce bunch of ORS in this section and there are e ones in the making so we should have

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M pen spaces with YLs are heaps more DELUXE warm evenings. WSDHT nd an a.c. receiver perking FB. W3NF nmer. WSAWO isn't bothered with es better totals. W3MC reported by me got late. W3UH is proving he is W3UX is using the 7- and 14-mega- immer. W3ZF is fooling around with W3ZF 123, W3NF 69, WSEU 47, 4, W3AKB 8, W3UH 57, W3MC 55, W JERSEY — SCM, Bayard Allen, new Route Manager, makes the port of the year. He handled 222 with ! If you want skeds, drop him a line Oaklyn, N. J. W3ATJ has been very snd only handled a few. W3KJ was s due to blowing his receiver tubes. vith Old Man Hard Luck. W3ATIJI 10. SYLVANIA —'SCM, A. W. McAuly, ny last report as SCM for this sec- work to my successor, Mr. Robert to thank all of you for your coépera- I sincerely hope that you will continue ler the supervision of Mr. Lloyd. I any of you through the mail and kept on the air as heretofore. WSYA p but has dropped some schedules DLG says the SG detector is FB lenty of traffic on 7000-ke. band escape from serious injury when he lenser bank charged at 4000 volts Sin Erie. WSGU is back at his old s building a 14,000-ke. transmitter to th the 3500-kc. set. WSAGO has his ne shape. WSDUT reports a new WSCUG has been helping out has returned from South America time visiting Brazilian amateurs n ORS and is going to get it. A fine North Braddock reports activity na this month WSCDH, WsDFA, WSAEO and WSDCV of Altoona ibe, reported as a 250 watter in sa ‘type 250” instead. Some dif- WSDNF, has been elected secretary an, WSOC is now President ransmitter for airplane use at s Norman F. Pier's call at Union phone and cw. WSBNU wants a WSBVG says boat schedules lish. Any person or persons in the to send in reports to the SCM hem to the Erie Amateur Radio warded in a bunch to the SCM. WSDLG 48, WSCNZ 47, WSCMP 24, WSAGO 6, WSDUT 6, WSAVY 14, ENTRAL DIVISION ting SCM, K. F. Conroy, WSDYH it WSCEP is leaving us as SCM, will be pounding brass more now, rk by WSAJC sure helped this M WSCVU, WSCSG WABDI SCST, WSBPL and WSBTK are all e, OMs. W9AXE sez, “YLs" skeds. WSBRS claims 7 mc. Radio eaks). WSBGY and WSAUB both ites shelved for a YL. WODFS is ww. WSDDO is trying 14 me st of the gang he reports tfc ne raised cain with W9EGF about WSDSF will be on with new xmtr. r things. WSBRO and WSCU say » RC now. WSDVQ likes AA work © says QRL but his total says dif- ill bands soon. WSACB claims he's s W9GJX sez swimming is all wet, OST Avuaust, 1930 but she likes it. Say, Gang, did you get any cigars from WSDRB? (94% lb.) YL. FB! WSDEN says if the off-freq. 3.5 me. phones would learn to talk with their hands, QRM would be more endurable. WSMV has a new 204a and only needs 6 or 8 more continents for a WAC. WSCWK is wait. ing for the gang to start something on 28 mc. (Flow about organizing a 28 me. club? Write us). WSCAT is the new Route Mar. for District 1. Who wants District 2 and 3 RM jobs? Lotta tfe will come from WSDAA this summer, WSDMS, WSJD, WSAJG, WSALN and WSBAA will op. WSHL caught a lightning-bug and is teaching it the code WSCEG and WSCST show the gang how to handle tfe with revg tube xmtrs, FB. Stations looking for tfc are WSAJC, WSCAT, WSJD, WSDDO, WSCEG, WSCST, WSAEQ, W9EGF, WSBRS and WSDYH — unload on them for effi- cient QSP. WSFX-City of Straits fame is alive again. WSBPL is at 1546 Cadillac, Detroit. WSDYH still sends code practise (5-12 WPM) 10 a.m. Sunday, 7 p.m. EST Tuesday and Thursday on 3600 ke. and has lotta customers, including YLs! Mark THAT 16th of each month on your calendar now, and send in the reports. Let’s knock ‘em dead, Michigan Traffic: WSAJC 100, WSSH 1, W9GJX 13, WSACB 10, W9CE 3, WSAEQ 57, WSDVQ 15, WSDED 5, WSDDO 11, W9EGF 4, WSDFS 5, WSTJ 10, WSCVU 21, WSBTK 5, W9AXE 9, WSCKZ 5, WSBRS 16, WSCEP 9. WSCEG 17, WSDEN 11, WSMV 31, WSDYH 106, WSCWRK 5, WSCAT 19, WSBDI 6, WS8CSG 19, WSAEM 338, WS8BJT 15, WSAXM 7. ILLINOIS — SCM, F. J. Hinds, W9APY — W9DXZ and W9DOX are attending camp at Camp Grant. (Rock- ford, Ill.) W9DXZ is rebuilding for fall traffic. WOAVE isa new man on 3.5 me. with a 210 at Yorkville. WYCYB blew out the old mercury arc. A buffer stage Xtal Control outfit is being installed at W9DAX to go with a Loftin White speech amplifier. WODAX has logged 221 stations on the 1750-ke. band so far in 1930. W9EIR is home from school and pounding brass very hard now. W9FGW still has the fifty cent 210 he bought from WYBW Kk over a year ago and has worked 12 countries with it. Hi. WOARY and W8FGW will hitch-hike to the Pacific Coast this summer. WOBDW is on again with a 203-A in HiC Hartley with 1500 V. for7 and 3.5 me. W9DGK was logged in England on 28 me FB, OT. W9ASY and W9APY both have new a.c. screen grid receivers. WOFUR has just received a DeForest 503-A which will play on 14, 7 and 3.5 me. WODZM stayed home all month and put his time to good advantage by hanging up a total of S32 messages. That is a nice mark for us all to shoot at, OM's. WOBYK was the host at a hamfest of the Peoria R.R.L. and nearby hams on May 31. WYKB has sold his high power outfits and is on 3.5 me. with low power. WOAFN is building a 210 outfit for 3500-ke. traffic work. The gang, including W9CYQ,. W9RR, W9CFL, W9DTK, WYDOA, etc., gave W9CUH and the Waukegan gang a visit while they were at Great Lakes Naval Training Station. WOFPN worked XOQ on 14 me. WYDJ complains of too much * Out- board Motor Boating.”’ Hi. W9BNI is keeping his schedules very nicely with AA net. W9ERU is rebuilding to a Push- Pull TPTG. He took a message from WFAT. W9FCW lost his father this month. We are all very sorry, Om. Rectifier difficulties at WOBNR. WYFDY is receiving reports from Holland, England, Germany, etc. W9CCZ wants contribu- tions of news from the gang for the CSRA news. W9AD has corn-field QM. Hi. WYANQ has now QSO'd 25 countries W9AFF has left Thordarson Electric and Mfg. Company to go into business for himself. W9LL will be on a farm during July and August, where there is no electricity so he will only be able to receive. WOCKZ says two of his messages were from WI BT to Mobile Press. FB Traffic: W9DZM 832, W9OCKZ 77, W9BIR 53, WOFDI 10, W9AMO 37, W9BVP 28, W9ERU 18, W9AFN II W9BNI 10, WOKB 9, WOFCW 8, W9CUH 6, W9APY 5 W9DGK 5, W9DOX 4, W9GIV 4, W9ASY 3, W9DJ 3 W9FPN 3, W9GJJ 3, W9BMQ 2, W9BZO 2, W9ACU 1, W9BDW 1, W9LL 10. OHIO — SCM, H. C. Storck, WSBYN —I wish to say that I'm sorry so many of you report too late to have re ports forwarded to me in Dayton, and therefore are not in- cluded. Last month several good ones lost out that way, and we need the totals too. Let’s get up and at em, gang

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930 from freq. RM only Vait- bout new RM mer op. ode with IC, EQ, effi- ain. onds SST ers, Aveust, 1930 The Convention will be held here in Dayton the last few days of August, and already plans are under way. Better plans to come, because it’s going to be good. Get further de- tails from the Dayton gang via the air. WSLT, Ohio State University, leads the gang this month with 169. W9GZ comes next with 136. WSCNO has gone on a visit again this summer, and only had part of a month to work. WSBAC rolls up 70, which is not at all bad for hot weather. WSDDF is back with us until September, when he will go back to Purdue. WSNP, the faithful, turns in 51 without help of schedules. WSDU, another “9” to come to the “Sth” is located in Columbus. WSBK M is still working fast and furi- ous with AA and gets most of his traffic there. WSADS has a complete new transmitter. W9DMX is out for traffic on 3.5 me. WSCSS is taking a portable east with him July 14th to 28th. WSTK is leaving us for the summer. WSBGX and WSCX are keeping in touch with each other by radio while W9BGX is away for the summer. WSDVL reported by phone. WSBDU reports he and WSDMX took some mes sages, WSD MX calling the party on the phone, and enabling W9BXB to talk to his father. FB work, OMs. WSCX sug- gests that we run a “CQ Hound” column in QST. Hi WSCFL is still plugging along. WSARP leaves for Val- paraiso, Ind., for the summer, but will be back in the fall WSDDQ is going well, and the club is going to continue thru the summer for the first time in history. FB. WSDIH finds his time on the air very limited. WSDBK is off the air altogether on account of the YLs. WSBBR is still inactive, and darned if I blame him much. No “spanking” for you this time, WSAPC. WSPL says air dead. WSRN is still on KFNA. The Warren Amateur Radio Club has been offering prizes to Warren amateurs for number of QSO’s. WSDYC won first prize and WSBMF second. FB. Well, gang, this is a short report, but when so few report, there’s not much I can write Traffic: WSLT 169, WSGZ 136, WSCNO 64, WSBAC 70, WSDDF 65, WSNP 51, WS8DU 37, W8SBKM 33, WSADS 0, WSDMX 20, WSCSS 22, WSTK 17, WSBGX 10, WSDVL 3, WSBDU 3, WSCX 3, WSCFL 2, WSARP 1 KENTUCKY SCM, J. B. Wathen III, W9BAZ Heat Waves vs. Radio Waves! A knockout for the former Get your old fashioned mint-juleps at W9AZY; he wins the Red Eye. W9DQC has a speed-boat for sale; a bargain at $500, WOEY W says he was disappointed at the small bunch at the last meeting of the A.R.T.S. W9ACR is warming up and we hope he will be with us often from now on. W9AUH will celebrate the Fourth by opening up with Xtal. WOBWJ requests suspension from ORS duties for the time being WAIN had a nice trip and visited several of the Section hands. W9OX went fishing and got tanned. WOARU with two ops and no traffic. How come? W9DDQ dropped to 14 ke. for the summer. W9FZV is pounding brass at Kyrock W9FQN has an AC receiver going. W9BAZ has one hum- ming. Hi. W9GAL expects to have xtal shortly. W9GBX will be going as soon as his two new masts are up. WOBAN changed to push-pull with gratifying results. To the ORS having the largest total of traffic from June 15th to Sept 15th, the SCM will donate an ORS A.R.R.L. pin. There are many active stations in this Section who never report Give us a little dope once in awhile, OMs. Glad to see any of the gang if they get to Louisville. Just fone Belmont 2145. YL’'s acceptable, and how! lraffic: WOAZY 104, W9OX 56, WOBAZ 15, W9AIN 11, W9BAN 7, W9FQN 7, W9AUH 6, W9EYW 3, W9FZYV 3, W9DDQ 2 INDIANA SCM, D. J. Angus, W9CYQ W9CUD has just completed and delivered the crystal temperature control and the power supply for WLAP at Louisville W9ENX is at the Valparaiso Radio School. WOEGE, W9RS and WODZX and W9FBH are back from school and operat- ing the home stations. W9DDB is now on with WSDDF at Cincinnati. W9BHE and W9DXM_ are new stations at Elkhart. W9CIC has been appointed chief radio officer of unit one, section three, US.N.R. W9FCX has moved to South Bend. W9FHB is a new ham at South Bend. W9GGJ had three more tubes go west. W9YV is the new call of the Training School at Valpo. WORW is now the portable call for the school. W9ASX is in the land of the “‘spiks’’ doing commercial operating. W9EPH reports for the Richmond gang. W9CMQ says the Richmond Police Dept. received Ost 55 their O.K. from the F.R.C. and as soon as appropriations are completed work will begin on a 50-W. Xtal control trans- mitter. W9BZZ is on the sick list. W9FX™M is back on 7000 ke. after a trip to the hospital. W9F XO works 14 me. every p.m. W9FKE is remodeling his home to fit his transmitting equipment. Hi. W9CWS handles some traffic Traffic: W9GJS 9, W9AKJ 29, W9GGJ 11, W9DDB 23, W9AIP 26, W9CYQ 13, WORS 2, W9EPH 10, W9CWS 14. WISCONSIN — SCM, C. N. Crapo, W9VD — W9GFL is doing good work at Green Bay and has been appointed an Official Broadcast Station, operating mostly on 3750 ke. W9OT is still on the job and took a 136 word msg from WFBT without a break. W9CER is a new station at Jeffer- son. W9VD is working mostly on 7150 ke. and occasionally on 14240 for the summer months rraffic: W9GFL 38, W9OT 4, W9CER 2, W9VD 4. DAKOTA DIVISION OUTHERN MINNESOTA SCM, J. C. Pehoushek, S W9EFK W9COS is off daily schedules for the first time since October. Leach of W9BN has the 7000-ke. set getting out nicely. W9DRG lost his antenna in the Southern Minnesota cyclone. W9BXE will be on 24 hours a day with five operators after the first of July and is open for schedules. QRA is W9BXE, Corp. Marion Alewine, H. Q. Co. 3rd Inf. Fort Snelling, Minn. W9EFJ is on spasmodi- cally. W9AKN W9CTT worked WFAT. He also was host to CELAX. W9GHO has been busy with orchestra and fishing. W9DGE is trying for the Minneapolis Police Short Wave Station. W9DMA is QRL. W9EYL is building a new a.c. receiver. W9OBNF is on only Sunday evenings. W9FLE, a new ORS, will be active on 3500 ke. Sunday mornings. W9BQF says business is good, no time for radio. W9DSH is haunting Lake Minnetonka. W9EOH is busy at KSTP. W9ELA is at new QRA about six blocks from the SCM. W9FJK is a new man in South Minneapolis with a beautiful 210 transmitter and a screen grid receiver.W9BLG has gone back to Winnipeg. W9YC will be closed down for the summer. W9AIR is going on his vacation. Radloff attended a hamfest which Goblish, W9FLE, sponsored. They got acquainted with the Western Minnesota hams, W9EJE, W9EZJ, W9BGG, W9BBN and W9DRK. All these except W9BBN operate on 1750-ke. fone. W9BBN has a 7-mc. xtal. W9DRK of Madison works on 14 mc. W9EJR has the memps. W9BNN is planning an elaborate outfit for next fall. W9FMB is assigned to a shut-in at Morristown. He will be on 3.5 me. and wants tests. Traffic: W9COS 328, W9DRG 108, W9BN 144, WOBXE 10, W9EFK 8, W9?? 3, W9GHO 3, W9DGE 1 NORTHERN MINNESOTA —SCM, C. L. Jabs, W9BVH W9AV leads the Section in traffic and sends in a lot of news. His sister, W9EXU, is still getting cards, letters and fotos by the bushel. W9BCT had his transmitter at the Northwest Aircraft Show in St. Paul. W9ADS is still on with his Hartley but has his CC job coming along fine. W9EHO is too busy with farm work to pound brass. W9CIY has business QRM. W7BVH is installing a trans- former to increase the plate voltage on the frequency doublers and it is hoped the output will go up. Few reports were received and there will be some cancellations of ORS in the near future. Read the rules, fellows Traffic: W9AV 20, W9BCT 6, W9ADS 2, W9BVA 2. NORTH DAKOTA SCM, Guy L. Ottinger, WOBVF The Jamestown Gang had a visit from W9I1K. W9IK is hitting the fone strong and reports that four of the gang are going on N. R. cruises this summer. WSDM is also down in Jamestown teaching summer school and running W9BVF once in a while. W9DGS is busy with summer work. W9BVF visited W9DHQ in Wishek and found that we may have a new ORS amongst us soon. Traffic: WOBVF 17, W9DGS 3. SOUTH DAKOTA — SCM, D. M. Pasek, W9DGR — W9DB is on 3.5 me. with a xtal and is trying to get a fone going on 14 mc. W9CIR went to the convention at Ames and while there passed the exam for Broadcast operator's license. WOCKT, Madison, got daily news direct from the National Guard Camp at Rapid City. W9DGR went to Duluth and took a broadcast operator's exam. A ripping good time was had with the operators of WRL of Duluth and KSTP of St. Paul. This is my last report, gang. I want

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A WwW W NZ ~ 2s

HU i NEW who reported regularly. Howard ix Falls, is our new SCM. Give him him put the South Dakota Section DELTA DIVISION ur . Henry E. Velte, W5ABI With » hot season it seems that most of this state have deserted their radio rts, which reminds us that W5IQ has ature golf, while W5ABI is getting possible. W5AGB and W5ADB are ttle Rock. Weleome, Oms. W5AY is 1 new baby boy. Congratulations! Iding. W5BMI has a new generator wer. W5ABL is getting out well with a Route Manager, is rebuilding to « ‘BRKT is on the 7-me. band and look- I is the proud owner of a new second perator at KFPW at Siloam Springs, SCM, James B. Witt, W4sP Here- the month of June. W4KH handled und VK. W4VK has installed xtal rig to roof of ten-story building and tarting point for that WAC W4DG is \IOPA. W4FX is watching W4DG to xville will graduate three new hams fellows, let's keep the amps flowing d 28 me. and let the SCM know what 1 two weeks’ auto trip through W4AGW is a new station W4VK 10, W4CW 6, W4FX 26, W4RO 6, WACW 6 F. M. Watts, Jr.,. WOSWF Sum t comes reports of less traffic and dx ec this month. W5ANA is installing YW reports that most of the ops have er. W5AKW is home from L.S. U. son 7 me. and is getting out fb ar I W5BHH will be at W5YW for the pounding out on 7 me. continuously Army-Amateur net. WOWF will be a new location. W5SEB worked wer Reid, VE2BE, for the first con- net for his station. The Shreveport s big hamfest the latter part of the embers in Louisiana, East Texas, i Western Mississippi are cordially any others who desire to come please later W5SANA 27, WOWF 17, W5YW 8, DSON DIVISION YORK SCM, H Rosenthal, 1 coming of summer, the reports and those reporting show a marked nt of traffic handled. ORS are ex nth, even if no traffic is handled, vacation when the 15th rolls around ecard instead of the regular one *L with all foreign messages. W2LU is Vibroplex presented to him by the appreciation of the help he gave ember ice storm. W2BKKN says every station, it turns out to be one of the duty. W2BAI is downhearted. He nd missed him. W2AYK spent his with the Naval Reserve copying the B ien't sure whether it’s good or bad rt with thirteen messages for the total the Graf every night on its trip to eports exams interfered with traffic JA reports the air dead during daylight tarted. W2QU handled traffic for the vith American good will flight W2QN 141, W2LU 95, W2BAL 17, OST

AvuaustT, 1930 W2ACB 13, W2BKN 3, W2AYK 3, W2ANZ 3, W2ACY 2, W2BJA 1 NEW YORK CITY AND LONG ISLAND — Acting SCM, V. T. Kenney, W2BGO Manhattan: W2AFO leads his boro with a total of 21. W2BDJ, a new 00, tells us there are still plenty of off-frequency stations. W2BNL can also be recognized as Portable W2ZZH, which will be oper- ated along the Atlantic Coast. Bronx: After getting lots of traffic from RXNIAA, W2AlUl had to quit the sked on ac- count of QRN. Plenty of skeds gave W2BPQ a good total W2AET tells us of WSBDYV stopping at his shack and seeing the sights in N. Y. C. W2AQG complains of other activities keeping him away from the set. W2VG QSOd XWIM and received a report from a New Zealander. W2APYV still skeds NJ2PA and HH7C. Brooklyn: Now that exams are over W2BIV promises better traffic totals. W2ATZ is working lots of VK and K6 stations. W2ARQ is keeping 6 skeds a week, W2PF is off the air for a month while he attends Ft Monmouth military training. W2APK has a third op pinch- hitting for him while he is on a vacation. W2BEV has for- saken 3.5 me. until the QRN lets up. W2BO is closed down for the summer. Long Island: As usual W2AVP, RM for L. I., leads that part of our section and nominates W2AST for the office of ORS. W2AST is a new station in Long Beach. W2BFC tells that his 2nd op is having trouble getting his set perking. W2AY M, the Boy Scout station, is to change QRA, W2AIQ-W2AFP, our latest addition to the 00 list, is checking ‘em on both 7 and 3.5 me. W2BNX< tells us that his portable outfit, W2AFU, will be at the Mineola State Fair for about a week starting Sept. 17th; several reliable skeds are wanted with New England, Phila., Chicago, etc., for U.S. traffic. W2AIQ is checking as a new 00 Traffic: Manhattan W2AFO 21, W2BDJ 13, W2BNL 4, Bronx W2AIL 75, W2BPQ 63, W2BGO 24, W2AET 9, W2AQG 7, Brooklyn W2BIV 85, W2ATZ 70, W2ARQ 47, W2PF 37, W2APK 16, W2BEV 5, Long Island W2AVP 18, W2AST 14, W2BFC 2 NORTHERN NEW JERSEY SCM, A. G. Wester, W2wWwRk It is necessary to remind traffic reporters that reports are due here on the 17th on each month as some still are under the impression that the traffic month ends on the 25th. Please mail reports early. W2JF has been selected as Route Manager and your SCM is sure that he can arrange skeds for any of the gang. Please give him your fullest cobperation. W2A0OS has enlisted in the U.S.N.R. W2API reports. W2CWK reports that the Raritan Valley Radio Club had a very successful banquet on June 14. W2JC hasa new rectifying system under way using S66's. W2AG\X is playing with 3500 ke. W2BPY won prizes at both the Hud- son Division and the Raritan Valley banquets. W2BDF is still busy with BC station duties. W2CJX only operates on week ends. W2BY took a {0-day trip to Canada with an- other Y L. Following are notes on the activities of the Bloom- field Radio Club. The following members are all on the air and with xtal control: W2BCC, W2FL, W2AFB, W2VQ, W2BVB, W2BA, W2MB, W2FP, W2GG and W2JC W2BUH steps out with WSAOI at his home at Seet Run, Pa. Ten members attended the Raritan Valley banquet Colonial Airways at Newark Airport has the following ama- teurs on the pay roll under the supervision of F. W. Webster, RE., W2CO, W2VQ, and W2GG, who all are operators on the tri-motored Fords using calls WIOXS and WIOXAD W2ZZA worked all continents except Asia last month on 14 me, W2CFQ sends in his first report. W21RJZ is another first reporter. W2AFJ using 210s in push-pull is stepping to all points of the globe lraffic: W2JF 66, W2AOS 14, W2CWK 11, W2JC 1, W2AGX 3, W2BPY 11, W2BDF 6, W2CJX 10, W2ZZA 7, W2CFQ 12 MIDWEST DIVISION EBRASKA SCM, ¢ B. Diehl, WOBYG — W9ANZ is again laid up in the hospital, W9DFR 4s. had to take down antenna on account of roof re- pairs. WOEEW is very busy at this time. WOEBF is rebuild- ing KMMJ. WOFAM is still rebuilding with heavy fall and winter tfe in mind. WOEH W is experimenting with antennas WOBHN is on vacation. WODI built a new receiver. W9BOQ is very busy with farm work. WOBLW is on 7000 kes. again W9CPJ sends first report as ORS and works mostly on 1850

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eeing ities and skeds over rking eds a is Ft inch- s for- down I for 2AST Long otting h inge ist, is it his » Fair skeds , lor BNL ET 9 2A RQ nd ester s that e still yn the Lexi as frrange fullest 2ZAPI Radio ‘ has a GX » Hud- DF is ites on th an- tloon the air V2VQ W2sc t Run, nquet y ania ebster ore of XAD Lon 14 er first r to all WIC 1, ZZA 7, Ya O9DFR ool re- ebuild- all and tennas Vor ) again yn. 1850 kes. righ W9BEX sends first report and it is a “‘ peach,”’ too. W7CGW has sked with W7HX Trafic: WYDTH 1, W9DFR 6, WOEHW 1, WoOBLW W9CPJ 4, WOBEX 12, W9CGE 3 IOWA SCM, H. W. Kerr, WODZW W9CKQ keeps VK5HG and has 393 QSOs to date; by special permissi f the Radio Inspector in VK they are handling traffic between the Dept. of Research in Terrestrial Magne- tism, Washington, D. C., and the Magnetic Observatory Watheroo, West Australia. W9WJ is out for an ORS W9FFD reports qso with WFBT. W9EJQ finds carpenter work fb. WOFUD is with us in spite of qrn. W9FZO got his gsi from a K6 and plans to rebuild. W8ACL adds his bit to Davenport's reputation. W9GKL finished hi-school, visited the lowa City gang and got a bit of tfe on 3500 ke. W9DPI sez since getting the 8 mfd condrs at the Ames convention he gets PDC reports. W9CKD is schooling at Valparaiso for a com'l ticket. The Tri-State Club have a “treasure hunt’ the 22nd, prizes given for locating WYTA, the club's portable The Co ‘Radio Guild” a new club of Bluffs and Omaha hams and service men. W9GDG is appointed OBS. W9DDX is on the air with a 201 and 150 v B batts Traffic: W9CKQ 43, WOWJ 40, W9DZW 37, W9FFD 23, W9EJQ 22, WOFUD 18, W9FZO 13, W9ACL 8, W9GKL 3, W9DPI MISSOURI t “ WOBHN 4, sked wit! Bluffs gang are interested in the SCM, L. B. Laizure, WORR W9DZN still operating for the Miss.-Warrior Service, QRA SS Wynoka, home port Dubuque, Ia. WYPW led in traffic this time [ro St. Louis. WYFTA followed close with a n ajority if delivered messages. The balance of the activity came from W9IGHG, W9AMR and W9DYJ. W9AMR reported twice to make sure of getting in, as did WYGAR. Kansas City WIRR, WOCFL and Ensign Lowe, chief at WDAF, were or cruise at Great Lakes with the U.S.N.R. and report a very pleasant trip WYDQN lost his second op, as WYECS went to Dodge City for the W. U. WODQN handles a good many messages from Ft. Leavenworth to P. 1. addresses. WOA KZ had t ve but kept one sked going. WODPA is on 14 me W9CFL is kept busy working U.S.N.R. skeds. WYDHN took a night off and went back to 3.5 me. looking for old fiends. WOGAR is still pounding brass through QRN W9BJA says there is still some traffic moving. WYWEYG sold his fone to WUFVM and is now using 3.5 me. CW again W9EPX just got back on the air. WUBGN reported QR WYEMM unit in St for filter to arrive S.N.R yperate much but still has cruise with the U.S.N.R. on the Great Lakes or have already done so: WOC FL, WYURR, WOAJIW, L. G. Riddle Traffic: WYDYJ 5, WOFTA 29, WOPW 33, WOGHG 6, WIAMR 4, WODNO 2, W9BJA 33, WOGAR 9, WODQN 235, W9AKZ 20, WOCFL 81 KANSAS SCM, J. H Amis, WO9OCET WoCET keads the section in traffic and has been on for the 28,000-k« tests. Any one going on the fourth U.S.N_R. cruise get in touch with WYUBWYV, WOBTG has left for the Gulf Radio school. A 3000-volt MG is the plan of WODFY for ul. The YL, WOCGM, says she is ready for big busines w. WOGHI has gone to the harvest fields. WODEB ha lis xmitter at the U.S.N.R. Armory as a temporary unit sation. WOFLG is working long is planning active organiza Jose ph WYDNO was too busy hopes. The following will tion of a | t j please hours so doesn’t get to be ich. WOHL is forced to resign his ORS and we sure hate te se him. WYEU X is out of town most of the time so n little W9BHR is working on a new idea in frequency eters. The KV RC report that plans for the Division ¢ enti n Sept. at Topeka are progressing nicely lratlic: WOCET 43, WOBWY 28, WYUBTG 6, WOFDY NEW ENGLAND DIVISION WICTI ONNECTICUT SCM, Fred A. Ells, Jr., W1AMQ makes the BPL with a rush sends in their usual high total and continues to o« WIMK ipy space in the BPL. WLAFB has a daily schedule with VOQH and is experimenting on 28 me. WIRP is taking a portable on a trip to Cleveland with WIAZP. W1HQ was mited by WOBYE. W1TD wants to know where the gang son CCT NITI So does the SCM.) W1AMG is active in the LC.R.C. WLADW has been playing with 2S mc. but doesn't hear a 1e. He will use same call with his portable this OST 57 summer. WIBHM won the Third International Contest certificate for Conn. F.B. and congrats. W1UE is inactive but busy at Headquarters. W1AZG is having good luck with WIBBU WIBVW re- land WLVB attended a meeting of at New Haven. WYKL and WILE were on The T.C.R.C. is to be compli- n their fine new clubhouse. They will have a sta- tion in operation with a lot of ops in the very near future. W LAJB asks to be placed on the inactive list for two months. He reports, WLAUT, a new station in Middletown. W1AGZ, 00 for this section, reports several! off-frequency stations Only twelve stations moving traffic this month. Let's see if we can do better than that and give Eastern Mass. a little competition! his low power set and will increase power soon sends in his first report and applies for ORS ported in person. W 1¢ the T.C RA hand from mented Headquarters rraffic: W1IAMQ 233, WIMK 426, WIAFB 39, WIRP 10, WLHQ 12, WLTD 12, W1AMG 6, W1AZG 2, WIBBI 7, WICTL 9, WIBVW 6, WIAJBS EASTERN MASSACHUSETTS SCM, Miles W. Weeks, W1W\ \ number of the ORS forgot to report this month so our total has suffered in consequence. WICMZ shows his usual consistency and is the only one to make the BPL this month. Most of the gang are either vacationing or rebuilding during this period of poor radio weather. W1ACH 15 days’ duty with the U.S.N.R. and reports visiting Portland hams during one of his cruises. W1LM is playing with 14,000 ke. but says spark plug QRM is bother- WIASI is keeping several skeds on 3500 ke. A “B”’ eliminator is doing duty on W1ACA'’s receiver with good re- sults. WIBOB reports by radio from Europe signing NAMS on 7000 ke. WLWI \ newcomer is W1ABG who has been working some good DX besides a little traffic work on 3500 ke. WIADK also submits his it WIW/Y has acquired a fine cabinet n which to house one of his Xmtrs and has rebuilt accord- rhe new Norwood hams, WICCP and WICQN, are still experimenting with their transmitters but find time for W1QZ has resigned his ORS due to what he calls an “incompatibility complex."’ W1KH reports being QsO with HAF3C. Due to a change of QRA for the summer he will not be on the air much until fall. W1LQ is active is the time, gang, to be making your better traffic and a good time to get the bugs out of your equipment has been on some where he is has built a new receiver. titial report ngly some traffi wain on 4500 ke Now irrangements for good skeds routes lraffic: WICMZ 275, W1ACH 116, WIASI 79, WIBXB 74, WIWYV 53, WIKH 42, WI1ACA 30, WILM 2s, WI1LQ WIABG 16, WIADK 5, WICQN 4, WLCCP WiWwt MAINI SCM, G. (¢ Brown ceived, from Chairman W. Haskell. of the Com- ttee on Arrangements, that the Maine Convention has »ved by Headquarters and Director Fred Best. A f speakers has been lined up and there will be a real everybody August 22nd and 23rd. attend and help the Forest City gang WI1BIG and his gang of hit-and-run ball players ecently enjoyed a fine week-end at the Naval Station at Cape Ilizabeth. The boys had a chance to tion and visit one of the The Queen ( WIAQI Word has ist been re been appr fine list « bang up Make plans now to time tor put it over inspect the sta- Eagle boats, which was in the ty gang have organized a ball team and expect to take on the Augusta boys for a hot game some- time during the latter part of July. W1FQ recently enjoyed a ng trip at Fort Monmouth,N. J. WICDX is na two weeks’ cruise at Cape Elizabeth. W1AHYis n his station to Peaks Island, Portland, for the summer W1KQ will be working for the W.U. in Northeast Harbor for the summer months. W1BEZ is getting out FB with his W1GQ was a recent to the Queen City WILAIT, is on the air with a crystal now lhe many friends of Phil Gould, of ry pleased that he is improving after an ill ness several 1 nths. The station of the SCM is under going a rigid reconditioning prior to the fall rush of traffi W LBFZ is high man this month. FB, Mel. W1QH comes in onditions still very WIARA, of has been assigned the position of operator at tation WABI Welcome, OM lraffic: WIBFZ 41, WIQH 9, WIAQI VERMONT SCM Clayton Paulette harbor two weeks trai oving phone visitor W1OG, formerly ind has a fine WILALZ, are ve signal second and reports « Mass poor Bangor WilT \

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oyed by WIBD, W1CGX, WIBCK, i WI1IT at our annual hamfest held at ike Memphremagog. I am going to ex- to all Vermont hams who wish to come station this month, WIBD of Barre, s joining the Army net, and also says wer outfit in Burlington this summer er Jct. is now on 3500 and wishes to nt gang as soon as possible. We have a air in Hinesburg, Vt., now. Please ex- 1 to him. His call is W1ATF [ASSACHUSETTS — SCM, Dr. J. A. WIBVR blew his fifty and is now back leuller 30 watter. W1ADO is still build- r xtal fone. W1BEG is having a hard his filament transformer keep cool on ZJ reports that he will spend his vacation C. W1UM finally put his 50-watt xtal s getting out fine. Rumor has it that tt xtal fone under construction and will the “Fone Boys” on 3500 kes ter is heard regularly on 3500-kes. fone still upholding the Heart of the Com- ne and is experimenting with C.W \ has come home from the Briny Deep it WORC. WIBKF passed his Com- I r out as soon as his ship comes in ew hams, WIBDP and WIBAU. Both ne on 3700 kes. WIASU is busy with Any amateurs interested in either the net are invited to communicate with college and will be on during the brand new jr. opr. Here is W1N’s Dear SCM: Nothing much here this ed my car on Memorial Day and, same lriving that car, so it’s no surprise, hi rystal outfit on 3700 ke. The Wore their seasonal wind-up June 1%th ovies wid eats at their headquar- St. There will be no regular Thursday ret Thursday in September. With this ng off as SCM and thanks the gang for Leo Peloquin W1JV-24 Arthur St., has ted SCM to serve for the next term ind best wishes WIZB 4, WIBVR 40, WIBEG 10, WI1ZA 19, WIBEA 10, WIBSJ 10, I SCM, V. Hodge, WIATJ As I wish to thank you for your support peration in making this section one of ng two years. Congratulations are says he is engaged to a YL he met ges to keep a couple of skeds during ND there as the WX is too nice to WIBAC is reaching out with his 20l-a on DXing on 14 me WIIP 4, WIBAC 4 ND SCM, C. N. Kraus, WIBCR pull job in June QST and has it going building the same set. WICBS has a WIAVH is building a new sky hook with an 852. Members of the Radio ng a new crystal control 500 watt should be ready in the late summer planned to have television modulation Hollis S. Baird, Chief Engineer of the elevision Labs. of Boston, WIXAV- the club at an open meeting held at Baird described his system of hori- using a steel tape held in a drum nal scanning dise. He received pic- receivers from WIXAV and W3XK Andover and expects to be active this taking some of the Naval Reserve sum- 1 fine time OST Avaust, 1930 NORTHWESTERN DIVISION ONTANA—SCM, O. W. Viers, W7AAT~— M W7DD has a new receiver and transmitter and re ports good results. W7FL is back at his old location in Butte. W7AAW turns in a nice total despite “spring has came!"’ W7AKO of Billings reports changing location to Butte soon. What has become of W7MI and his 50? W7Jc will be in Billings for the summer. W7AEM has gone with the National Guard to the camp at Helena. W7AFY formerly of Bozeman is now in Billings. New hams will soon be on in Billings, Fromberg and Red Lodge. W7AAT will soon be on with a new 500 watt transmitter. Traffic: W7AAT 125, W7AAW 69, W7DD 24, W7FL 4 WASHINGTON — SCM, Eugene A. Piety, W7ACS — The plans for the convention seem to be keeping the Spokane gang off of the air. Let’s see you all there this year. W7QF the vice-president of the Spokane Club, is using a bandbor super and it works fine. W7TK is installing a ham xmtr at the Boy Scout camp for a few weeks. W7AFD can't see his xmtr on account of a new Chev. six. W7AG is using fone set now. Alaskan skeds keep W7TX supplied with traffic W7RT had the pleasure of visiting a Swedish op whom he had worked on the short waves. W7BB is back on the air again after touring around as radio op on a ship. W7AJ8 merely reports. W7VC reports for the first time. W7NR is too busy to be on the air much. W7AIT takes high place this month. W7ACS has been busy with school exams. The call of the sea has reached another: W7ACE shipped out for the Orient. W7KT uses 300 volts of batts. on a fifty watter and gets ri fm K6. The Yakima gang have persuaded the Chamber of Commerce to furnish all their QSL cards W7AAE divides his time between selling bonds and pound- ing brass. Don't forget the convention, fellows Traffic: W7AIT 51, W7TX 39, W7AAE 29, W7RT 24 W7AG 8, W7AJS 5, W7QF 5, W7NR 4, W7KT 4, W7TK 4, W7ACS 2, W7VC 18, W7BB 8 OREGON SCM, W.S. Claypool, W7UN Cancella- tions are in order for all non-reporting ORS if their indiffer- ence continues. W7ALM handles a lot of worth while traffic with K7 stations. W7AHJ reports a nice total. W7AJX re ports tfe. W7AMF is hopeful for better conditions soon W7WL is handling a lot of DX traffie and getting in some fishing too. W7ABH shipped out on the 8S. 8. San Gabriel and doesn’t think that he will be on the air for several years W7QY reports keeping regular sked with SFEN, the 8.8 Indianic, bound Brisbane. W7QY is a new ORS. W7AMQ changes his outfit so often he finds little time to operate. Ten members of the R.C.A.R.C. went on a week-end trip toa nearby lake and took along a complete transmitter but W70OM, the culprit, forgot to come and bring the receiver Hi. W7UN just returned from a week-end cruise to Astoria with the U.S.N.R. W7WP is back in town after going to school, where he learned the crystal grinding trade. W7WV is struggling to get on the air with a real outfit. W7AP is on the air whenever QRN is not bad. W7AEU is planning to put an 851 stage on his 3.5 me. fone. Hi. Let's hear from all the ORS next month! lraffic: W7ALM 62, W7AHJ 32, W7AMF 27, W7WL 21, W7AMQ 10, W7AJX 10, W7QY 5, W7ABH 8, W7UN IDAHO —SCM, James L. Young, W7ACN Re- ported by Oscar E. Johnson, W7AKZ) W7ALW is busy on 7 me. with an 852. W7AJQ finds some traffic on 14 me. W7AHG is on now and then with a 210. W7AFN and W7AR are busy with “talkies."" Work with power lines keeps W7QC off also. W7AKZ is trying to get on 28 me. W7UM is moving to Kent, Wash. W7QB has sailed for Alaska as & commercial op. W7AF is on 7 me. W7BV is too busy to be on. W7CG reports qrn but finds 14 me. good. W7ACP, W7ALY, W7ALH and W7ANA, all of Parma, are all on and making lots of QSOs. W7AFE has quit ham radio. W7ACP has trouble keeping one of his transmitters oscillat- ing. W7AFT reports QRN trouble, but manages to keep one sked twice a week. W7ZZF, portable call of W7 A LC, is tour- ing the U.S.A rraffic: W7ALW 20, W7AFT 11, W7AKZ 2, W7AJQ t th at | por and hug

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1930 AT — nd re cation 1g has on t wri p with 7AFY ] soon T will PL 4 CS okane V7QF ndb x ntr at ee his ne set raffie om he he air 7AJS NR is place The ut for watter ad the cards ound- r 24 rK 4 cella dliffer- traffic iX re soon some el and years ss AMQ Ter L 21, Re sy on i me V7AR keeps 7UM Lassa to be ACP, il) on radio cillat- p one tour- Aveust, 1930 PACIFIC DIVISION ANTA CLARA VALLEY SCM, F. J. Quement S WuNN Congratulations are in order this month for WéBAX who ran up the highest score in the Inter- national Tests. The SC Mis mighty proud of this achieve- ment, bringing as it does such favorable publicity to the Pacific Division. W6YG closed up for the summer on June 1ith with a nice traffic total putting them in the BPL W6DQH, the RM, is working with Army net and Boy Scout work FB. W6ALW will have xtal 203A soon W6BMW is still busy developing phone sets for Stage Fire Warden. WGEEC, a new arrival in this section, is working on 14,000 kes. W6AME moved again and between that and answering the lure of the trout streams, radio will be ND for the summer. W6QA is now on with a new CC job. W6NX’s xtal set will soon be completed. W6HM is vacationing in British Columbia for the summer Traft W6YG 256, W6DQH 57, W6ALW 48, WOBMW 18, WGEEC 8, W6ONX 6 EAST BAY —SCM, J. Walter Frates, W6CZR Con- ditions in traffic handling this month point to the fact that the entire section has moved to the cour try for the summer or that it is so concerned with present economic conditions that there is no time or thought for ham radio. W6BTZ was high man for the section during the past month, handing in larly high total before departing for Seattle to join W6ALKX, the next high man, has been holding an interesting schedule on 7 1 a partic the U. 8S. Geodetic Survey boat Gu with a party of East Bay Section Boy Scouts who are tourir the National Parks of the West under the guidance of Ansel Hall of Berkeley. The Scouts have a Heintz and Kaufma portabl transmitter which is putting a strong signal into the sect heir day by day story of the tour is being pu lished by a San Francisco newspaper. W6AOY is a new candidate for an ORS. W6RJ has been working a great deal on the plans for the “hidden transmitter”’ stunt of the Oak land Radio Club for the Fourth of July. WOBI of Berkeley sends nly one cryptic word to explain his low totals Vacat W6BZU at Concord reports that the weather st t in his secluded valley for consistent traffic work WHBIW is planni: g on building a sailboat for Lake Merritt und as soon as it is finished he will install a transmitter and receiver on it if the boat doesn't sink. WiBMS says that s canoe is almost finished, and he may be back on the at f he is not too busy using it. WOASJ has been doing s usual amount of work as an Official Observer, but re ts traffic as nil. Wit GM reports that he and WiDWI el try to get some DX with a fish line and sinker ear Rode W6BSB reports from New York that the Roumanian Arctic Expedition has been cancelled but that eis staying on in the east for a while. WO6CZR and WHUARI have been too busy with the arrival of a new junior op s YL this time to think about putting the old coffee perecolators back on the air. W6ARU plans to send out a QsT of thanks soon for the flowers sent her in the hospital by the section embers. W6AN has his trar itter on the air and plans to open his first schedule soon on 3500 ke WiGQ has been keepi i sked with his son, WUOCFD, wh sona camping trip with a party of Scouts in the mounta W6AQ is working hard on plans for installing a traffie statiot ut the Pacific Aeronautical Exposition at the Oakland Air rt. The Northern California Pre-Convention Round Up ind Hamfest was held by the section at KTAB and was a we success. San Francisco, Modesto, San Jose, and Sacra mento sent delegations. W6URJ acted as master of ceremonie and James Warner of KTAB fame was one of the principal speakers. W6ZD, Pacific Division Director, read the report i the decisions of the Board of Directors, and there was ich entertainment by professional and ham talent W6BAA officiated as usual with Oscar, the dummy Traffic: WOBTZ 489, W6ALX 169, WGAOY 25, W6RJ 21, W6BL 5, W6BZU 5 SAN DIEGO SCM, H \ Ambler, W6EOP W6AXYV leads this month and makes the BPL. FB, OM W6EOP is very QRL with fone. The SCM visited W6FP in Ucea ide and W6BGL in Escondido and had an FB time W6CTP graduated from the Fullerton J. ¢ l ind says he wil wv have more time for tic. WGAEP was also visited by the SC\ML W6BGL is now on fone. W6EPF is troubled with his mother. It seems fb to be back on this job again after a skeds. The secti Hollywood news comes thru W6AOA this: W6ENQ is still working on new shack. W6DQV is working ving married. Best of luck and hope she becomes OST 59 pwr leaks. WG6EPZ says no more time for tfe and requests eancellation of his ORS. W6CTR is heard on fone now W6BAM built the new a.c. receiver and says fb. W6BAS says to bring on those frequency meters and he will calibrate them for you. W6EOS is still building the xtal xmtr. The P. A. T. club had their semi-annual banquet and all had a fine time eating and dancing. Those present including the OWs and YLs were W6AJM, W6OCTR, W6HY, WGDNS, W6BFB, W6GEOP, W6FP, W6DAI and W6EOL Traffic: WGAXV 212, W6EOP 15, W6CTP 12, W6AEP 5, W6BGL 5, W6EPF 4, W6EPZ 3 ARIZONA —SCM, R. Shortman, W6BWS We wel- come a new man to the gang in the person of Bob Lockhart, Ir., of WO6EEB and W6ECW from Los Angeles. He comes to Arizona to take up duties as second operator at KGSI W6DTU leads the state in traffic. W6ALU operated by W6CDU is second. W6BJF reports two new hams in Phoenix: W6COI and W6PK. W6EFC is on the air every night after 9 p.m. W6EAA reports moving to a new QRA one block from W6DCQ, and W6DIE one block in the other direction, and says “Sweet QRM" Hi! W6EOF has been having lotsa fun trying to learn Morse since KTAR became NBC. W6DRE reports a new 4-tube a.c. receiver that is the W6DJH is dismantling for a while, and plans on 250-watt erystal using 3500 ke. fone. WGDGN reports that the Doc sent him to Los Angeles for the summer W6BWS-W6B6V\V is still giving the YLs a treat with his new Ford (Ahem) and says that, WOEEB-W6ECW, his new second operator at KGSI, is the proud possessor of his Ford's twin sister. W6ANO is still keeping silent about his W6DT wants sked East for the sum- berries.’ ctivities in Flagstaff mer rraffic: WODTU 282, W6ALU 268, W6OBJF 67, WG6EFC t, W6AWD 18, WG6EAA 1 LOS ANGELES SCM, B. E. Sandham, W6EQF It is with sincere regret that we learn of the death of W6ZH We will surely miss him and the section's sympathy goes to hard trip to Mexico City via automobile with an expedition d I.P.H. The following make the B PL—four of them mak- it both ways: W6QP, W6BZY, W6WA, W6DEP, W6AOA, W6AWY, W6EGH. W6QP heads the list with six s message total is 3300. W6AKD worked i4ZB on 28 me June Sth. The Tri-County Club spon- wed the quarterly banquet held June 7th at Pomona with ver 100 in attendance. WODEP tells us of a new ham com- ym at Pomona with xtal. WOAWY has a good sked with Hawaii which puts him in BPL. W6EGH says 95 per cent of his large tfe total was handled with foreign countries WoAKW due to his Philippine contact closing down for three months ssed the BPL for the first time in many months WO6EAF renewed his code transmissions for beginners WuETJ, the new Chief Route Manager, is a live wire and in provide skeds for you. WG6DAK is resuming sked with KAILCE and states that W6DH is coming back on air after two years’ absence; welcome, and don't forget your tfe re- rt, OM. W6DVA is rebuilding with xtal. WOTE is busy at iiege. WGUEN took portable to Santa Cruz Island (YL) ind handled 46 messages. WUAVJ is waiting for his 1-kw water cooled tube to be repaired. WGESA has rebuilt en- rely. WOBGF is using low power fone. WOBU Z is also using ve. WUOBJC sends in his first report and reports new club at Santa Monica. FB. W6OF sends in list of 1930 and pre- WtiDZI complains about his plate block going ip ins ce. W6AM has new QRA and is utilizing two 90- it telephone poles. W6FJ is working nights in talkies at " -e low total for once. WGCOT deserted 14 ce. for 7 me. WOCUH was heard in Switzerland and worked tith country. WOEEP is a member of the new Santa Monica Wireless Club. W6ACL will soon be on with xtal. W6LN is busy at KFOX but promises tfe total soon. WOERL is re iilding with 852. W6ID is having trouble wid new a.c W6BVZ has weather-vane note and gets different QRI with each QSO. Two former Navy ops have put Wowy the air on 3500 ke. W6BZY is in Chicago for a few nths. W6AWP is going East with portable. Bakersfield sonth: W6OETN is rebuilding wd DN. W6ABL is trying push-pull with xtal. WOENH is ng i YL opr.

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R W6BUZ IC 11, W6OF 11, national Contest for this section D, WSBUV, man there with PI tfe and consistent building new power supply for PDC note. ticket. Practically all of the elong to the Naval Reserve and will be hore stations and ships very soon. The ip and attendance is growing. Code re meeting and lectures are in progress ticket. The Long Beach Club i is promoting a trip to Santa Cruz na Club were guests of the telephone r comm } r comm wn through the plant 7, W6BZY 416, W6WA 300, W6DEP W6AWY 241, W6EGH 199, W6AKW W6EAF 69, W6ETJ 68, W6DVA 51, W6TE 47, W6EN 46, W6AVJ 46, s4 32, W6BGF 31, W6AOB 31, W6ENH 15, W6EAU 14, W6CXW 14, W6DZI 10, W6CZT 10, 9, W6FJ 8&8, W6COT 6, W6CUH 5, W6AKD 5 Keston L. Ramsey, W6EAD — ec this month. W6UO is still active WOCRF is all hot for 3500-ke Amateur Radio Assn. is going strong please drop your SCM a line and let the w Nevada is on the map W6UO 11, W6EAD 4 L. A. Walworth, K6CJB — The fol- were made in getting new machinery In rdcasting Station, Route Mer., Offi- 6EWB; ORS appointments, K6CIB, Official Observers, KGERO, K6DYC, nd K6CIB. Set. J. C. Bailey of 'EWB r June and the boys say he is “past The A.R.R.C. of Los Angeles is the first K6DUD is a very active new tra keds yaper some older stations working to keep na Ham Club is publishing an Ama- K6SH gladdened the heart of your me rly con plete f le ot QST. e being bound for permanent files to go M. K6DV boasts six new hams. Interest : ne and 28-me. CW. The congestion turn to 3500 ke. for inter- says he Ham-Aloha. K6CFQ, pecial radio from Aberdeen, Wash., to regular as it’s good reading while at BXW are leaving for Calif. All unlisted ll receive all QSLL cards addressed to in the Amateur Radio Call rd a big buzzing lately during a CQ ne west this time. It was only a em in reporting three stings. Fif- beginning ng us to likes correct d a j ) message total of 2097. W hen we Ka gang and W6 bunch will look like 1036, K6DUD 305, K6BXW 291, 18, KSEVW 73, K6GAVL 68, K6BOE ACW 8, K6BJJ 8, K6ERH 5, K6ALM OANOKE DIVISION INIA SCM, Don B. Morris, WSJM wing hams lose their ORS tickets be- ire to obey the rules of an ORS: WSSP, und WSACZ. WSCBYV and WSBWK, WSDPO was win- WSHD July for his vacation. WSCDV's 203-A ve years of service. WSACL, ExSBR, and is going to sea. WSJM had pleasure WSATE, WS8TI, and old C’mon, Gang, shoot those re- re new ORS stations st month please WSDPO 20, W8JM 15, WSCLQ 11, WSBCN 3, WSAYI 1, WSBTV LINA Acting SCM, John F. Bivins, tion will regret to learn of the resigna- e, W4TS, as SCM of this state. We hate Ost AvuGust, 1930 to lose Hal and hope that he will still continue to lend us his moral if not material help. Yours truly will pinch hit until, new SCM is elected. W4ZB was visited by lightning with disastrous effects to his 210 tube. W4AEW is still sweating over the xtal. W4JR is getting a lot of kick out of the AA net. W4AA reports a lot of activity in Greensboro with several new stations on the air. W4DW has recently been appointed NCS for N. C. W4TN is home for the holidays and checks in for active duty. W4AHH had a lot of tuff luck with his antenna and receiver lately and seems about “regusted"’ with the works. We are glad to welcome W4ABV back on the air after an absence of a few months It seems that the gang is going commercial as the following have recently acquired commercial licenses’ W4AIW, W4AJL, and W4ABV. W40C is now the proud owner of an Amateur Extra First ticket. W4AAU sez make way for his new xtal set Traffic: W4ZB 83, W4AEW 66, W4TN 4, W4ABV 2, W4TS 2 VIRGINIA Acting SCM, Ted P. Mathewson, W3F] Director Gravely of W3BZ visited the Richmond gang W3CA is still working hard on his transmitter. We extend our sympathies to W3ZA on the loss of his brother. W3CKL is taking his ham outfit with him to N. Y. C. where he is tak- ing a new job. W3KG and W3BGS are together now usinga UV202. Come on back in W3WO, the QRM’s the best ever W3BDZ has completed a new receiver. W3AHW keeps a tri-weekly sked in Morrison, Va. Hi. W3MT is working in Quincy, Mass. W3IQ promises us great things from the Mrs. pantry. W3AJA sends in a newsy report for the gang down his way. W3APT has a fine traffic report. McDonald of W3ARU is now in Pa. behind W8CU D. W3HY is working at NKF and helping Hunton keep W3AG on air. W3HOis with the Gen. Motors Radio in Dayton, O. W3TJ visited W3BZ and had a nice gabfest with Gravely. W3ASA is putting 200 vits on two 50s and it perks fine. W3AEV is pursuing an MA degree at Duke Univ. W3FE met some of the Toronto gang on his visit up there. W3ALL and W3BCI are new hams in Richmond. W3AAJ, W3NO and W3FJ urge you to route your traffic via Richmond. W3AA\J will soon be on with a 250 watter. Oh! Oh! The SCM appreciates the way you fellows came across this month. Let's all plan to attend the State Convention in Richmond in September Traffic: W3AAJ 56, W3APT 60, W3ARU 12, W3HY 1, W3AQK 12, W3AG 18, W3ALS 13, W3AMB 9, W3ASA 8, W3ZU 3, W3AEW 2, W3NO 6, W3AJA 2, W3ABC 8, E3FJ 5. W4AHH 10, W4JR 9, ROCKY MOUNTAIN DIVISION Miller TAH-WYOMING — Acting SCM, C. R l | W6DPJ — Very few stations report traffic this month, only two ORS reporting. There are several active non-ORS in the section who do not report. Let me hear from you, fellows. The section needs your support W7AAH has been working 12 to 13 hours a day, but reports a good total. W6DPJ is operating as W6ZZZ for the summer W6DPO, whose ORS was cancelled by request, continues to report W6EKF is 3500 ke W6DWH of Stockton reports his crystal control working fine. W6BTX using fone on is studying in California this summer Traffic: W6DPJ-ZZZ 111, W7AAH W6EKF 3 COLORADO 27, W6DPO 23, SCM, C. R. Stedman, W9CAA— W9CAA is moving again. WYCDE is busy examining fire men for promotion on the railroad. W9CLJ says his ticket expired, so he hasn’t been on the air. WOCSR is busy deco rating the house and car. WYEDM is at the National Guard Camp now and will be going full blast soon at the Boy Scout Camp with a portable. W9EFP is busy with farm work. W9EAM says fishing is fine. WOCAB is on the air now. Traffic: WYCLJ 1, W9EFP 1 SOUTHEASTERN DIVISION LABAMA — Acting SCM, Carroll Kilpatrick, W4AHR A — W4AHP, our SCM is at the C.M.T.C. in Annis- ton. W4AG is afflicted by hot weather. W4A KM has been off the air lately. W4AAH is building an MOPA W4LM is putting out a strong signal on 7009 ke. with xtal control. We welcome W4JY back after an absence of seven months. W4T'1 is still very active in the AA net. W4DS is Waw\ WAT

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930 1s his ntil a with ating e AA with been idays i tuff ibout come mnths ywing AIW, of an or his TR 9, V3FJ gang x tend CKL 8 tak- sing & ever eps & ing in n the gang onald king HO is isited SA is EV is me of sBCI W3FJ J will cates ] plan mber LY 12 LSA 5, BC 8, Miller this everal et me pport eports mmer jues to VH of 6BTX O 23, AA— i hre- ticket deco Guard Scout work ow tAHR A nnis- M has {OPA th xtal | seven 1DS 3s AUGUST, 1930 punching the ether with his 201A. W4DH is building a new xtal set. WtIA is back in Selma for the summer. W4AP is troubled by local QRM. W4 AJK has just been made Alter- nate C.S. for the Ist Alabama area of the AA system WiAKB rather inactive due to interference from the YL's. W4AAQ is contemplating buying a xtal. W4AHR is working at the local swimming pool. W4ZI reports the organ- ization of the Troy Radio Club. W4LT is on 14 mc. most of the time now. W4AIZ is on in Dothan Trafic: W4TI 25, W4LM 22, W4AHR 12, W4AHP 3, W4AAQ GEORGIA-SOUTH CAROLINA-CUBA-ISLE Ol PINES SCM, M. 8S. Alexander, W4RZ Hot weather and vacations have taken their toll of the traffic and other work in this section. W4AJH says he can't hear any hams in \{tlanta. W4SS has requested an ORS appointment. J. W Rickman reports that due to the death of his brother in a distant state he has not been on the air for some time. We take this opportunity to extend our sympathy to W4JI CMSUF down in Cuba reports that he has received his w.A.C. Certificate and also reports that he made the highest score for Cuba in the February International Contest Great work, OM. W4GT is a newcomer in Augusta, Ga., and we welcome him. W4AFQ has been busy preparing Augus- ta’s broadcast station for its opening. W4ABS of Ft. Ben says that the station there will be on the air the d and he expects to use all frequency bands nings, (:a year ar possi ble Traft W4AJH 15 CMSUF 1, W4SS 21, W4JD 31, W4AAY 22, W4PM 377, W4KV 81, W4ABS 42 PORTO RICO-VIRGIN ISLANDS SCM, E. W Mayer, h4hKD K4ACF handled a few as well as worked DX. K4AKV reports good DX but no traffic. KAKD wins wnother contest and you fellows let him get away with it without turning a hand. K4AAN is the lone delinquent ORS 1 (nce more and you're out, OM. You fellows can probably it why this report is so short. It’s up to 1 to turn in the news, otherwise we have no report. Traffic: K4ACF 6 FLORIDA SCM, Harvey Chafin, W41AIT, W4PAW r the second consecutive year the Naval mmunication Reserve Unit has been awarded the Lee montl hgure « Jacksonville ip trophy tor maintaining the highest degree of efficiency juring the year in the Florida area. The first report this mth was from W4AGB in Jax, a YL operator. Congrats Miss Hardin. Florida welcomes all new amateurs. W4AlIl soperating the Naval Reserve station at Tampa. W1ACM andled a few msgs. this month. W4J0 in Miami is keeping the Naval Reserve schedule from Section Three. W4BG as been doing some fine “DX this month. W4JH has a new 75-watt xtal transmitter on 7 mc. W4SK was in Tampa this month. W4MM says he is putting 520 watts on his 5?) watter. W4GV is keeping his Army-Amateur sked every Monday night. W4WW and his brother have gone to Detroit, where they will stay until next fall. W4ALH says the weather is giving too much QKN lately. W4AFT sends yd report with a good total. W4AKW is going to school seven hours a day and does not get much time for ndio. W4Q! W4ZZA. W40Z says the Naval Reserve station is enlarging its membership very month. Last month's QST has the call W4AFL. It iid have been W4ALF. W4TG says he is thinking of stalling xtal. W4QN has rebuilt his Schnell receiver ke W4AII's. W4ADP is still thinking of building that push-pull transmitter. W4OK reports for WiABK and WSAFN. They all promise a larger report next month. The lowing ORS appointments will be cancelled if your report D his se has a new portable call foes not yme in this month: W4IE, W4CK, W4CH, W4SD ad W4DD. W4QV is on the air with his fone set again NAG R is changing his 14,000-kc. fone to 3500 ke. Send in a report, fellows, so we can tell the gang what is going on thin our section. My QRA can be found on page 5 of his QS 7 Traffic: W4ACM 123, W4QV 93, W4JO 78, WAAGR 75, WiALH 66, W4TG 34, W4BG 57, W4QL 51, W4GV 38 WSK 32, W4AGB 29, W4AFT 28, W4ADP 28, W40K 25 WWW 22, W4QN 14, W40Z 14, W4AII 13, W4ABK 12, WHAFN 12, W4AKW 8, W4MM 8. OST 61 WEST GULF DIVISION ORTHERN TEXAS —SCM, Roy Lee Taylor N WO5IRJ W5HY leads this month. W5BIP, a new a ORS. turns in a good total. W5WW has a new re- W5BBF reports a new station, W5BLN, in Nacog- doches. Welcome, OB. W5ASP, another new ORS, has a fine total and is relief op at KGKO. W5BAM has been on vaca- tion es dropped in on W5JC and W5UX in the rounds W5BG has a new 8.G. receiver. W5AKV, another new ham, W5BGW has a d.c. note now. W5AAFE is still pounding out a few. W5JV is also putting in xtal. W5BLU also a new one, is doing fine. W5CF blew a grid leak and a 210 but handled some. W5LY reports a new station, W5ALA, in Dallas. W5BAD is working for W.U. at Dallas and will be on with portable W5AJS. W5GZ graduated from school. W5BND has rebuilt. W5AZP can’t get on the air it seems. W5RJ has finally got the big xtal job going. We need a Route Manager who can handle the job, also another efficient Official Observer. If you can handle either of the above, let me hear from you at once. The Fourth West Gulf Division Convention will be held in Houston. Plan to attend Traffic: WOSHY 56, WSWW 38, W5BIP 39, WS5BBF 25 W5BAM 16, W5BG 15, WOBAD 12, W5ARV 15, W5BGW ceiver shows wp 14, W5AAE 8 WS5JV 6, W5GZ 6, W5BLU 5, WS5CF 4, WO5LY 3, W5ASP 24, W5RJ 4. SOUTHERN TEXAS SCM, Robert E. Franklin W5OX I am sorry to report that the A. & M. College station, W5AQY, will be off the air until school starts again in September. Bill Evans, W5E0, was elected Club Pres of A. &. M. for the next term. Congrats, OM. W5BKW is pretty busy as Secretary of Houston's new radio club W5EI has just been appointed Route Manager for this section succeeding W5TD. Get in touch with him for skeds W5UX has two transmitters, one on 14,000 ke. and one on 7000 ke. W5AB reports activity slow out his way. W5ZG reports for Galveston as follows: W5AOC is doing BC work but expects to be on with a new transmitter soon. W5BBL has a pair of 112’s in a push pull rig. W5AFF is using his portable until he can get his xtal controlled St) going W5ZG reports his new Zepp working fb. W5MS is to be con- gratulated in that he has just received notice that he won the Third International Contest Certificate for this section FB, Om. The Corpus YL, W5BKG, has been showing the ()Ms how to work real dx, having wkd Portugal and Aust this month. W5ALV is a brand new Ham" in Corpus W5ZX is YL-struck hi! W5AHZ is having trouble making his 1.c. receiver work. BC work has been keeping W5MX busy W5TO is op at a BC station in Corpus. W5ATY, another new reporting “‘Ham"’ in Corpus Christi, is using a UX250 with 450 volts from a “B”™ eliminator in the old stand-by rGTP. W2ALD, who is working for Shell Oil Co., out of Houston, has a new portable call, W5AOJ. The Houston Radio Club is in full swing again with a very good attend- ance. The officers for the coming year are Robert E.. Frank- lin, W5OX, Pres., Jim Hunt, W5TG, V.-Pres., Leo Havard, W5BKW, Sec. and Treas. We want everybody to come to the fourth West Gulf Convention to be held in Houston lhere are a lot of nice things planned . Make your plans now Send in your reservations to W5OX or W5BKW rraffic: W5AQY 91, W5BKW 43, W5EI 30, W5UX 27, W5AB 22, W5ZG 19, W 5AQK 12, W5TD 11, W5AFF 7, W5MS 2, W5ATY 2 NEW MEXICO SCM, Leavenworth Wheeler, Jr., W5AHI —A number of stations have shut down for the summer months. W5AJL is building a new crystal control outfit. W5TV is on a three months’ vacation. W5JZ is a new station on a ranch eighty miles out of Roswell. W5AHI will remain inactive for several more weeks Traffic: W5AJL 42, W5AHI 1 OKLAHOMA —SCM, Wm. J Gentry, W5GI W5AUV is getting an honorable discharge as ORS from the SCM. W5CB is too hot to do much tfc handling. Hi W5MM is sure going good on 14,000-kce. fone. W5QL is still the ham commercial in Okla. with that power. Hi. W5SW seems to be overworked in the elec. business. W50J has our friend Hart Farwell from KFR6 visiting him. W5ASQ, our RM for Northern Oklahoma, is perking right along now W5VQ reports working WFAT about 1000 miles west of

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reports graduating from OU. Fellows, I fa FB West Gulf Convention coming Texas, Sept. 4th, 5th, 6th. Sure want to see s building a 14,000-ke. set now and is ke. wid a 210. Glad to hear from a new Okla. City. Let’s have more reports, gang 18, W5VQ 29, W5GF 16, W50J 11, CANADA few reports have been received on the wes handled during the Prince of Greeting Relay. The Quebec boys rd for their division and their SCM f them. G5ML was on the receiv- ed twelve messages from Montreal pleased if all those who took part in 1 report direct to me, so a complete nade and a letter of thanks for- RSGB for the part they played in the ll Canada are greatly reduced this static must be getting in his work ed the chief offender. Come down on nd try Wednesday nights for Cana- ild be glad, if you intend visiting ng your vacation, to have you call on Harbour 5151 and visits to local urranged IAN GENERAL MANAGER Arex Rem, VE2BE QUEBEC DIVISION . SCM, Alphy Blais, VE2AC — Through ( } t f our CGM we are welcomed to do ‘phone « 1,100-14,300 kes. under certain restrictions rking DX and handling traffic in spite VE2AC is back from his honeymoon sked with VE2AU. Congrats to VE2AP legree. Mrs. VE2CA pounds away as ever VE2BB is handling traffic and has a fine r VE2BH is es. VE2BG is going to put up new fuy- will give him a hand. VE2BB had a visit perator. Hi! Hi! Two new men join us r, VE2EM and Bonnett, VE2EY in St {EV. Welcome Boys. Pleasant vacations t in a new tank condenser 28, VE2AP 8, VE2BG 7, 3, VEZEM 5, VE2EY 2 VE2CA 5, ONTARIO DIVISION \ SCM, E. (¢ Thompson, VE3FC ( ; till maintaining his two regular schedules, lead in traffic totals. VESGK is active Lys that ZL and VK come through FB VESAD is hitting the trail with a 7000 r Wild Hotel in Miskoka. VE3XC used during the month. VE3DW is still Beamsville with fine results. VE3FC is ex- AC tubes on high frequencies. Northern ce, VESET, Acting SCM VE3SHI on be back on with an 852 and a pure VESBG lost one of his 5O watters bat ‘em out. VESET met VE3AX and 1 visit from him and VE3BG. VE3BH B Batts. for his 210. VE3DM’'s new TNT » 201A. VESAR has a terrible noise in happened to VE3AG, VE3BD, VE3CO, VE3GD, VE3GG, and VE3KB Ost AvuGust, 1930 Traffic: VE9AL 17, VE3GT 13, VE3GK 10, VE3X¢ 5, VE3DW 2, Northern Dist: VE3HU 6 PRAIRIE DIVISION ANITOBA — SCM, A. V. Chase, VE4HR — M VE4FX, whose QRA is Fort Churchill, Man., was in Winnipeg recently. VE4DK has gone to Camp Borden for a further course in flying. VE4BU found it im. possible to operate his set this month on account of bad QRM. A newcomer has started up in Winnipeg using the call VE4AG rraffic: VEADJ 8, VE4HR 3 SASKATCHEWAN SCM, W. J. Pickering, VE4FC The Regina gang are planning a convention to be held in Regina on August Ist. VE4BB managed to squeeze a few messages through. VE4IH reports. The rotten WX has put a crimp in the activities of VE4GR. Traffic: VE4BB 5, VE4IH 1 VANALTA DIVISION LBERTA — Acting SCM, G. E. Panter, VE4AF— A Fred Barron, our SC M, left the first of the month for Waterways and requests the gang to listen for him at tHI-HJ. During his absence please send your reports to VE4AF, 25 Richardson Bldg., Edmonton. VE4HG is back with us again as 4BW with a TGTP outfit and promises big things. VE4DZ has a portable transceiver under construc- tion which he will have with him on his holiday tour across the continent. VE4HM is experimenting with receivers VE4EA reports a brace of cards from Zedders and a heard card from an Aussie. His brother is second opr. now. VE4AF has a combination 50-watt xtal and 250-watt TGTP VE4GD and VE4BQ were visitors in Edmonton on the 24th of May. VE4BQ recently moved to Calgary, where he is setting up a 200-watt oscillator and 250-watt power am- plifier rig. VE4GD has just completed rebuilding his xmitter and is now using a TGTP and VE4BQ aays it's hard to beat for a beautiful job. FB. He writes to say that VE4CG and VE4DX are newcomers on the air, and VE4CJ and VE4CY are back with us again. Looks like Calgary might rival Edmonton again with active stations BRITISH COLUMBIA SCM, J. K. Cavalsky, VESAL — VESAK has been off all month. VE5BM is back on sked with VESGT. VE5DR has moved to Powell River VES5BC is talking super het and a high-power transmitter VESCR is on regularly now with a very nice signal. VESCF is on more often. VE5FI is experimenting with push pull detectors and AC tubes. VE4EI and wife are visiting Van- couver with VE5AH. VES5AL has had several qso's with ZL and VK stations. VE5AC still finds time to handle the odd VE9AJ pulled off some snappy relay work re VE5BR wants a 3500-ke. sked with someone in VESGT at Prince Rupert says he is the only VES5AW in the Yukon is still message cently Vancouver active station there just now leading the DX hounds rraffic: VES5BR 1, VE5AC 7, VE5AL 21 MARITIME DIVISION EWFOUNDLAND Acting SCM, E. V. Jerrett, N VOSZ VOQH paid us a visit and has a very 4 interesting layout on board. Good luck to Manley VOS8AE will be operated all summer by a ham from Prince town while MeNeil goes north. VOSAN reports a brand-new transmitter with a pair of 852s. VOSMC is doing some re porting for the RSGB and wants some reports from the gang. VOSAW can be found most every evening on 14,000 ke. VOSWG will be kept going this summer by a volunteer ham from U.S.A. VOSZ spent an interesting hour on board the Morissey looking over VOQH LATE AND ADDITIONAL REPORTS KAIHR is keeping seven schedules. rraffic: KAIHR 697 vk: all! k6c em. Wi whe wh wia vk5 ems wla wha wa wor gois wor

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1930 xe 5 HR — n., Was Camp it im- of bad ng the E4FC held in a few as put AF — nth for hin at rte t s back ses big netrue- across eivers heard E4AP (GTP ve 24th » he is pr am- mutter to beat G and E4ACY t rival valsky, s back River mitter ESCF sh pull g Van- ith ZL he odd rk re one in e only is still errett a very lanley Prince- id-new me re ym the 14,000 unteer board Aveust, 1950 WS5AYL, Ed Oldfield, 1415 N. Kleim, Oklahoma City, Okla. yk2dv vk2je vk2jt vk2hm vk2ns vk2dj vk2sg vk3bw vk3es yk3hl vk3pt vk3rg vk3z2x vktcg vkimf vkSohg vk5it vk5ld silft zl2ab zl2bz zi2gl zl3bb ziaa k4kd k6avl kGbde ktidxw k6cb k6evw k6erh k6ewb kalem kalhr vetbm vedac veddu em2wa xb William Lockerby, Red Sea Patrol, c/o G. P. O., London, England aufaa auSam ctler ctlaa dicm d4gl dtuaw ear ear%S earl02 eulac eu9%ac euGnn fmSmt fSwre fSedb fSaja fSgevr fSwbha fSzb fSgi fSror fSes {Sed fSdt g2nz g2nm g5zn g5br gitz fSolu gifa giwt hafSaf hwSay ohldha ohtng oz7jo sp3kx spsor vslab wlarg wladb wlawe widbs wlle w2bv wiku wZavm ward w2bjo w3aws w3aul wiahp w2aft waanp wift wthe wSct wSdrj smSua kfzt xfSrvl xfStpa yi2dgq yiZgm zsSu zsim fSpse g2cj goby givp w2aj zutin ts5w y , . . , Clyde Shaw, 213 Holmes St., Youngstown, Ohio 7TO00-ke. band whadw t wheke wtas! wibpo whexw wheqz whaz woos whieix w6dui w6hm war wiwa wi7va wl7aah wi7lz wamo k4+kd kidk k6oa kticib zllaa zl2ab zl2bb aclbd vkohg Zhu vk5hd vk5it x9a x29a x2x em2uf cmSyb mS] fl em2yb vetdj nninic earf4 kdv5 on4tjo J. F. Quigley, 645 Polk Blvd., Towa Des Moines, 3500-ke. "phones wlaby w. L woe wiev w4tia wtoa woawg woSbie wo5kx wiabf wtibiu w6brk widqb wtikd w7acj w7J7ant wSaj! wSazo wSbuw wSbyr wSecz wScjb wSejh wSdoc wsdtk warw ve r 14,000-ke. "phones gbis wla wibjd wlcei w2el w4gw w5ql w6kt wScke wSdid ward wSwm w9auh ve3bm x W2ABY, T. SS. NiO Jr.. aboard ‘American Shipper” Heard between New York and London wlabd wlaep wlagn wlahb wlakb wlaku wlamb wlanx wlape Iben wlbez wlbsn wlbvr wicto wlepi wlin wlfx whd wl wllz wlmk wipk wlisz w2adt watx w2ba w2bff w2bha w2bia w2bjo w2bse w2cbp w2ev wlcwk wiex! w2fk w2jn w2qn wlrq w2rt w2sm w2wi w2wz w tal p Woaw tba w3bnu w ep Wolm Wola Wop! wish wut Wajh wiale w4ft wthd wShd wS5td w6am wSark w7dd ¥7zz wSagi wSalu wSamy wSbax wSbid w&Slt wShx wSpe WSqb w9abu w%ecu w9fuq w9um cne ctlep ctlep ct2ar earz eiSe fSfix fSedb fSwiz g2gz g2nl g5bd g5odr g6bx k4a kikd ntk 0 on4tuy ve20a ve3ed xearn W 9A if -W or "BS, Doualas Raw, Cle arwate vr. Min: ° band lu ipa helfg helle he2jm zi3em ce3dg ce2ab oa4j giml em5Scx py2ik 14,000-ke dy lulba ludda lu2ca lu4fa ny an 2ms Par bylaa py2ba py9fb pylem py2sb fSgg Calls Heard. OST 63 WS5AMH, Billie Basden, 215 N. Archer St., Groesbeck, Texas 7000-ke. band k4kd k4taecf helfg heldr emlby em2jm emS5fe em5fl kfr6 kfu5 fkzt falnx kalhr kalem kalaf kalet vk3jk vk3ws vk5it vk6sa vk6ius vk7wi vk7ch nninie nn7nic nneab rxlaa ve2be ve2ca ve2ap vetbk veidj acSrx pylaa vk5bhg xlj x5a x5z x¥a x23a x29a ti2wd 3500-ke. band (‘phone witoh woive woapw w9zb Warne r( ‘hane / (ex-WSGB Bor Ii aboard { ide ‘Califor nia,”’ co Poastm ister, Vari hk St. Station, Vew York City, N.Y. wlasf wlabn wi3dsw wSbnt wiqv wtakg w3anh w3nr wisuw wtalk wOumw w3utw wlbda wiit W2BIH, C Brewster Lee, 1329 Teaneck Road, West Englewood, N. J. efSapp {8fk f8pam fS8pro xf8wbh efqb g6xn ondfp k4aci lu4dq xpaoja paowx fS8acj f8edb f8mst c2ax2 gtint gbixb on4uu k4ni ctlaa su8an kdwu fSep [Shr f8rrr g5ms g6vp yn4gn earl pylem pylbl nj2pa ox7x nnInic {Sct cShs fSrko g5ml giwy on4gm ear96 pylea uolkr fyvm2fy rwx fS8eo f8jd f8rbv g5rm g6xo on4gp ear98 py5af ye2ab xw7eff nmbx fS8er fSleb fStsn g4jl g6xj on4jj earlly lu9dt ok2yd kfr5 fqpm W4AHQ, Vernon V. Story, Route 2, Box 31a, Aub ‘rh, Ala. 7000- and 14,000-kiloeycle band wlaze wicfi wlzz wlem wlemx wldaw wlaqi w2ake w2ai w2jn w2¢ef w2rs w2baf w2dab w2bfq w2afv w2bk w2atx w2bn wlaik w2bve w2bnx wS3aur w3alk w3aws wo3awr w3db w6dkv w6auk whect w6dk w6aoj w6aqj w6ern wé6el widte w6cha w6czk wticfu w6t] w6am w6bau w6cuh w6arv w6aqq w7bb wirr rxfr5 kfr5 nninie nn7nie veldm ve3oe > glav g6ime g2cg g20q nj2pa ear37 ear47 cbh3ab ev3ab pylaw ctlaa em2jt fqpm ex2ak WSAVS, D. T. Byram, 43 River St., Homer, N.Y. 14,000-kilocycle band {Sct f8pro f8ix f8rko xfSwh ctlby ctlaa oklmx d4abg paocgw xpaoja xpaozz g6xn g5ml g2xv g2lz giqb g5ux g2qv gowy ce3ac ce3bm celah py2bg pylbl pylaw py2ak pylel nmbx k4ni k4kd W6DTI s F. L. Easter, 1336 E. Monroe St., Phoeniz, Ariz. 14,000-ke. band vlacp wladz wlbux wlicek wleje wlemx wieqr wicru wleri wldq wlfk wiry wlow wlwe wlzz w2aof w2aql w2bdr » w2tp wdaqs » wSera wSdjv d4akg d4on w2bjl w2bvg w2el w2fp w2gp w2jn w2n w3cee w3sh w3ut w3zf 32u wiaer wicq wiw > wSke acSrv ce2ac ce2ab ce2ak ce3ab ce3ac fSaap fSaje fSaxq fSbqr fSfr f8jf fSorm fSrko fSrrj g5by g5bz goml gowk g5qv g6hp g6vj g6vp g6wl jxix jxax k6alm k6eat k6akw ly7al ly2jf lx2nu nnInic oath oa4q oato oa4s pki bh pkljr pkl vu2kt vu2yx vk3go vk2rv zl2ac zl4ai wfat im rxfr5 rwx velac ve2bb ve2bh ve4dbh ved5bu

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Correspondence The Publishers of QST assume no responsibility for statements made herein by correspondents.

Out-of-Band Policy Hartford, Conn. May 13, 1930 lerrewy, Chief, Radio Division, t of Commerce, rton, D. C. f Directors of the American Radio was in session in Hartford on May Chese Directors, sixteen in number, sections of the country, and in r the meeting had made a thorough iteur radio conditions in their re- itories and informed themselves on lesires of our members. It had been dvance that one of the most im- of business to be considered this nsideration of the amateur ‘‘off- and a study of ways and means irs within their allocated frequency mateurs of the United States con- present situation on off-wave oper- mateur bands is serious and that little excuse for it. Our Directors ir members in every section of this favor of a more strict enforcement ties of law provided in this matter ir Directors reports his member- program whereunder the law trated to have teeth and where, ment of guilt, penalties will be nateur radio wants more complete the hands of the Department of aid in putting our house in order ternational situation which will Copenhagen and Madrid, and to lves against complaints from other services. Under the regulating of es, the Department of Commerce of thus controlling the operation of icted by my Board to advise you lesire of the American Radio Relay he Secretary of Commerce comply D) of the Radio Act of 1927, as mmediately putting into effect the pending the operator's licenses of all stently violating the regulations of sion by operating outside the fre- prescribed for amateur services.

OST AvuGust, 1930 This office will be pleased to be of any assist. ance that it can to you in the carrying out of such a policy. Our Communications Manager has also been instructed by our Board of Directors that, in all cases where the Communications Department of the League acquires evidence satisfactory to it of consistent off-wave operation, he shall forward such evidence to the Secretary of Commerce with a specific request for suspension of the operator's license. From time to time, as data accumulate here, our Communications Manager will cor- respond with you direct. If you have any instrue- tions to give us concerning such cases in general, we shall be pleased to receive them. It is earnestly hoped that the Radio Division now has the facilities to give some attention to amateur radio. Although we are to a huge extent a self-policing and self-disciplining organization, it has been so long since amateurs have felt the police power of the government that there is now the widespread feeling amongst the great major- ity of amateurs who are law-abiding that our activity should not be permitted to suffer from the wanton or careless sets of a minority, and we feel obliged to call upon the government for assistance I shall be very pleased to receive your advices, and with kindest regards to you and Mr. Downey, am Respectfully yours, — K. B. Warner, Secretary and General Manager DEPARTMENT OF COMMERCE, RADIO DIVISION Wasuinaton, D. C. May 15, 1930 My dear Mr. Warner: Receipt is acknowledged of your letter of May 13th, in which recommendations are made as & result of your annual meeting, with respect to the enforcement of the regulations governing tem- porary operator certificates and the penalizing of operators for operating outside of the prescribed amateur frequency bands I am forwarding a copy of each of these letters to the Supervisors of Radio, with the intention that such recommendations be carried out. Respectfully yours, — W. D. Terrell, Ch ief, Radio Division

Dee St & VR? a UG <a, “yy a,

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1930 assist- put of _ | Equipment o it of Designed to meet the new rward amateur requirements of an ad- = ) equately filtered D. C. current ators ulate | cor- strue- neral, a Filament Heating Transformers Xxtent , Line Sec. Sec. Test ation, Type VA. Cycles Volts Volts Amps. Voltage it the H-4648 12% 50 60 200/230 5 12,000 : now H-66A 25 50 60 100/115 10 12,000 \ajor- H-4649 37% 50 60 200 230 15 12,000 : om H-4650 50 50 60 100/115 10 12,000 from H-4651 50 50 60 200 230 10 12,000 d wi H-4652 100 50/60 100/115 20 12,000 t for H-4653 150 50 60 200/230 30 12,000 N vu wmUUMuUnhN, These Filament Heating Transformers have a voltage regulation vices, er : : aan within 5%. Note insulation test voltage. Plate Transformers P-4656 290 415 50/60 100/108 2360 O.175 6,000 two 211 115/125 1180 two 845 nvager The above Plate Transformer is designed to deliver 1000 volts D. C. with the average filter. Other Plate Transformers can be furnished upon receipt of specifications giving your requirements. Choke Coils Choke Coils for these rectifiers can be supplied. Amertran Radio Parts have long been recognized as the highest quality. Amateurs who have obtained the best results realize their value. Write for bulletin No. 1066. TRANSFORMER COMPANY 172 Emmet Street Newark, N. J. MER AMERICAN KA Say You Saw It in QST It Identifies You and Helps QST

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Marine Radio Operating () H B O yY ! ! ! “Raitor, QST? San Marino, Calif In practically all radio magazines one will find Ready for advertisements painting in glowing colors a de. lightful picture of the life of the marine radio iE i mediate Delivery ! ! operator. While the statements made are not direct falsehoods, they are sometimes misleading THE NATIONAL and do not present to the prospective student 4 representative idea of the conditions actually SCRE EN GRID encountered by the average marine radio opera- tor. For the benefit of those amateurs who are contemplating marine radio operating as a means 4 i | ra) & a of making a living, | will try to present, in an unbiased and truthful manner, the conditions that actually exist in that field at the present time. \ eal power ° : . : iia talon At least a year of practical experience is neces- i sciaililieindiianen sary before the radio school graduate can be ; one sane classed as an expert and efficient operator. The as Department of Commerce requires a person to copy twenty-five words a minute in Continental Morse and to have at least twelve months’ ex- @ perience in ‘‘stations open to publie correspond- ence’ before he is permitted to take the D i for use as examination for a first class commercial license p mplifier In order to hold down a job on a passenger vessel ser g equally it is necessary to have an intimate knowledge of "* . frequency the ‘‘Q” signals and operating procedure as well m lier as the ability to copy from twenty-five to thirty words per minute on a typewriter & Living conditions on board ships vary greatly Large freighters, tankers, and passenger vessels N lower plate usually provide their operators with fairly decent impedance than the quarters, although many of them are not too . screen grid — well equipped with washing or bathing facilities. pla 1d impedances On smaller vessels, such as ‘‘steam-schooners,” - ier to design. fishermen, and tow-boats, the quarters are usu- ally far from satisfactory and, in some cases, almost unfit for human habitation. The meals on freighters and tankers are nothing to go into HARACTERISTICS e ecstasies over; there is usually plenty of plain, and more or less wholesome food. Steamship ‘— companies only allow their stewards from forty Plate Volts 600. cents to one dollar per man per day for rations, Dissipation (watts). . . 20 so it is evident that there cannot be very much 5 G. Volts 150 “turkey and trimmin’s.”’ There are a number of Bias notorious exceptions, popularly known as the Deieiien 25 “starvation lines,’ which skimp on everything, “Multit ies 30-60 and it is well for anyone to steer clear of these. tance (ohms) 100,000 At sea, nearly all passenger ships serve excellent luctance (Ma’V) 1. food and the officers are given the same meals Dactes 100 as the passengers, but when port is reached and the paying guests depart, the decrease in quality and quantity of the meals is astonishing Price $12.50 The salary of a radio operator on a one-man ship will vary from $65 to $120 per month, most jobs paying either $90 or $105. As would be , . 1 expected, the aforementioned ‘starvation lines” National Radio Tube Co. . are the ones which pay the $65 and $75 salaries PREPAID IF CASH WITH ORDER 3420 18th Street l here are a few vessels on which the operator, in addition to his regular duties, does the work of a San Francisco, California freight clerk or purser and receives as much as $175. On all except the largest passenger ships chief operators are paid from $105 to $150, second Say You Saw It in QST — It Identifies You and Helps QST

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+ ‘a CARDWELL'S ill find 3 a de. tually no a ) { etme - amma means in an litions resent > radio re not cading dent a ho are neces- an be r. The son to nental IS @X- a a spond- T.. Star Spangled record of Card= e the cense well Condensers stands on a high peak, alone. They have always vessel dge of been the choice when Performance was the prime factor, when human s well thirty life was at stake, when a condenser was needed that could stand up eatly when the going was tough! ‘essels lecent A. With Byrd over the North Pole—with Dyott in Brazil—with Byrd 11L1€8, ners,” again making history over the South Pole—what a record! » usU- CUSES, Is _ . ' “ With the Army and Navy, Signal Corps and the Coast Guard, lain, . . ship Used by General Electric and Commercial uses. arty and Westinghouse. Are tions, much eT of ; the hing, H hese i =~ The 201-E (2 plates). A. lent Transmitting Condensers taper plate condenser for if your dealer does not short wave =o ay ype The stator plate is ad- * . for Amateur, Broadcast justable, affording max- stock. Write for literature. imum capacities of from Receiving Condensers in they good enough for you? a wide range of types and capacities. Order direct neals | and ality 50 to 10 mmfd. Price $4. man 1 be The Allen D. Cardwell Ms. Corp. ond 81 Prospect Street, Brooklyn, N. Y. yr, in of a ‘“THE STANDARD OF COMPARISON “%% h as 2 a - CC Nm + ships Say You Saw It in QST — It Identifies You and Helps QST 64 cond

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= BETTER FILTERING SAFER OPERATION AND LONGER LIFE FOR YOUR TRANSMITTER 1ser in the power pack of your be made to do more than 1 capacity to the circuit. It can very effective protective device its associate equipment against Int t of the radio transmitter, voltage surge 1 considerably greater extent than in voltage filter circuits of a receiver Ther rges due to keying, surges when the ind when it goes off — surges that >ly end of many a tube, resistor and The } trolytic Ww | thus protects its associate appar This LING in ser seq its ising number of Amateur to their use | Licensed Amateur Operators — Filter Condenser is SURGE ny way short-circuiting the power sour path for the dissipation of the surge atus ze has passed, the condenser HEALS es in normal operation. It cannot ng surges, such as commonly occur in characteristic, together with its per unit and its almost unlimited life idoption for filter work by a ninent aaa receiver manufacturers Mershon Condensers are in use today Station re employing Mershon Condensers in “he characteristically Pure D.C. note nsers, at their new low prices — and you can re ter circuit of your transmitter to one of g t a very reasonable cost. re Proof Filter Condensers’’ tells how lains the pr inciples of construction nser, illustrates its newest develop- ost effective circuits for its use \ py will be sent you on request Just r station call card or letter-head, Amrad Corporation, 285 College le, Massachusetts. > LATION 28 { Hillside, Mass » Proof Filter Condensers.” STATE. LO Say You Saw It in QST - It Identifies You and Helps QST operators $70 to $120, and third (if they are car. ried) $60 to $105. On one-man ships the operators are not required to stand any regular watches, They usually work from three to nine hours a day, listening for calls, receiving press, hydro- graphic and weather broadcasts, or transmitting traffic. On passenger vessels carrying over fifty persons, including the passengers and crew, a continuous watch is kept and the men are re- quired to work either eight or twelve hours a day There are still a number of ships having only two men who stand “watch and watch.’’ Apparently some of our leading steamship companies do not believe in an eight-hour day for their employees when they can legally evade giving it to them. The “popularity and rollicking fun aboard ship”’ mentioned in some advertisements leads one to believe that radio operators mix indis- criminately with the passengers or take part in their sports and entertainments. Nothing could be further from the truth. Operators are not per- mitted to speak to or associate with passengers except in the line of duty; nor are they allowed to use smoking rooms, promenade decks, or any other places provided for passengers. These rules are strictly enforced by practically all steamship companies and their violation usually results in the dismissal of the offending operator. As for the “excitement, adventure, and thrills,’ the writer can only say that he has had five years’ experience as a commercial operator and he has not encoun- tered any more adventure than if he had stayed at home; certainly the long, monotonous days at sea are neither exciting nor thrilling. The environment on board American vessels is not particularly conducive to either mental stimulation or the accumulation of many social graces. The mates and engineers, with whom the operators take their meals, are nearly all unedu- cated, and in some cases almost illiterate, for- eigners; their table manners are not above crit- icism and their conversation is usually confined to lurid stories about women and liquor, or both. On many vessels these officers consider themselves far superior to mere radio operators and treat the latter with contempt. Due to the competition between radio com- panies, these concerns do everything possible to keep in the good graces of the steamship owners using their service or equipment. In case an argu- ment in which the radio operator involved, he is placed in a very unfortunate posi- tion, because the radio companies will almost invariably uphold the cause of the steamship men instead of helping the operator. Because there is a surplus of operators no one is greatly concerned when it becomes necessary to dismiss one of them in order to preserve peaceful business relations or to keep operating costs down. This competition and their own lack of organization are the chief reasons why radio operators are unable to obtain better living and working conditions.* arises is * There is, we understand, a shortage of marine operators at present, in the lower-paying positions, because the better- qualified and more industrious operators have landed bertlis ashore in commercial radio, broadcasting, etc >) >!

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’ Car- ators ches, Is a ydro- (ting fifty Ww, a a re- day two ‘ntly » hot Vvees m. oard eads nclis- rt in ould per- vers «l to any “ules ship s in * the riter ence yun- ived Ss at Is is ntal cial the »du- for- ‘Tit- ned oth lves the om- 2 to ers ‘gu- Osi- ost nen isa ned em sor lon hief ain tors ‘ter- RCA RADIOTRON UX-860 Sa a alla al One of the well known Screen-Grid transmit- ting tubes For the amateur or others having transmitters working at high frequencies (above 3000 kilocycles) this tube will be found advantageous, since its internal shielding obviates difficulties due to feedback and self-oscillation. This Radiotron is primarily designed for power amplification at Radio frequencies. It is not generally satisfactory as an audio frequency ampli- fier or modulator, for which purposes other Radiotrons are available. The user will find Radiotron UX-860 possesses the same rugged con- struction and performance qualities as the well known UX-852. 75 Watt Filament Volts ° ° ° 10.00 Filament Amperes . ° ° 3.25 Instruction book giving further rating and data information will be gladly forwarded on receipt of request giving the call letters of your station. Firm net price, $37.50. RCA VICTOR COMPANY, INC. ENGINEERING PRODUCTS DIVISION 233 BROADWAY NEW YORK, N. Y. NAPRAAAARARARAARAIIAIAAIEEEPEID EDA AAS Say You Saw It in QST — It Identifies You and Helps QST

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UNCLE DAVE Slreet Albany few York, » oelland trode Hara wont eae ‘ ey Pow (ur UN¢ >): he yov@ Gt. Que gett we w > our ay PLACE MK got it for you! re Toh h Spec ae for This Month + Power Type Crystals $5.75 t pre« lite holders ncluding broad pecit ations Write for Special Prices x complete ision in the 35 cast bat Power Type Crystals $5.75 ) K.C. (eighty $5.75 $2.75 $1.50 $50.00 It 250 AMP storage batteries. $14.75 $60.00 es D.P.D.T. $.50 )—-100 milliammeter, used $2.45 vapor 281 new type list $7.00 net. $4.50 r net—R3, prepaid to your door. . .$10.00 pes (used) $12.00 ts $1.40 kets, a pair $3.00 nica condensers .00025, .0005, .001, 00 F ee 4 »plies filament for four 226, one 227, ) Its plate $2.50 hielded five wire cable, per foot $.40 | motor generator used $25.00 nee $ . Ss f insulators $.12 00023-6000 volt transmitting condensers er dial list $25.00, special $13.00 rf fil. trans. with foll. voltages, two 1! nd two 7 }¢ C.T. fil. windings, special $1.45 und grid leaks 4” x 6”, 50 watt special $.69 tested and guaranteed to function, while $.85 er contact key $.95 els and corner strips for any size cabinet. 1) volt porcelain insulator, 2 mfd $4.50 . It porcelain insulator, 4 mfd $7.00 ensers a $1.75 000 It cond., .00045 with velvet vernier $9.50 enter tapped trans. $1.65 p kit $26.50 mplete with pack $45.00 stat new type ‘500 Watt" $5.50 forms $.39 uM » grid leaks $.39 not center tapped and two 7\4 center lings . $1.95 yuzzer $.95 1erial wire $.95 a hundred feet. Two 1.75 Iter chokes 144 Henry 200 mill. .$2.95 oks $.85 ’D, 250 watters $35.00 $9.00 1000 watter $1.75 lis $17.00 tric 211A, D, or E 50 watters, $15.00 $50.00 $7.50 $11.85 Here's the Real Buy tity new original cartons $ .89 $1.15 $1.05 $1.00 UX 874 $3.25 eee $2.25 side center 150 watt $3.90 inum, sq. ft $ .65 ¢ postage with ail orders aa on e / uarters ron. Good tim Visal our radio e assured e you for sale or trade? carry every ything for the Ham FOREIGN TRADE SOLICITED yr free Ham sheet D. AV E’S RADIO SHACK Ne > "earl St., Albany, N. Y. Say You Saw It in QST — It Identifies Y« Radio operators, especially those who do not have to stand any regular watches, have unusual opportunities for fitting themselves for better positions; they have a surplus of spare time, and conditions are ideal for study. Many waste their time gambling or in reading cheap fiction, but there are a few who turn their leisure hours to good account by studying and preparing them- selves to take advantage of the numerous oppor- tunities which exist for the expert in any field. A number of operators have become successfyl authors, engineers, and lawyers through utilizing their leisure hours for study. It is my belief that this unrivalled chance for study is the only feature which makes it worth while for the ambitious young man to become a radio operator. Radio operating should be used as a means to attain an end and should not be ap ultimate goal. The novice will do well to keep this idea in mind when he tng oe the field, Men yn R. Rathbone, , W6EBGJ-KFDT Five years at sea seem to have fed up our eathes with for- eign travel, but life on the sea and the sight of foreign ports will ever have a thrill, particularly for the native inlander, even if to be viewed through the porthole of a tanker. Or do tankers have portholes? Eprror. Another Angle on the Beginner Problem Detroit, Mich. Editor, QST: Perhaps the experience of one of the greenest of green beginners may be of some benefit to others in a similar position. It should in fairness to the great mass of amateurs be brought home to the fellow breaking in, lest he arrive at the same mistaken conclusion I did. About two months elapsed between the time a station license was granted and the time the sta- tion actually was QSO. During that period ex- actly seven transmitters and no end of antenna systems were constructed. They appeared to function from every indication ever outlined in the Handbook or elsewhere. But no answers. Locals were heard and called day after day, with this adjustment and that, but no QSO. Until, at length, the rather disheartened op (?) arrived at the conclusion that those fellows had forgotten their early struggles and couldn’t be bothered answering a feeble chirp origins iting in the same district. ‘High-hattin’ me,” was the way it really looked. Then the difficulty was located. The station, lo- cated in an apartment house, really had a handi- cap. A well-grounded metal roof was soaking up every speck of radiation obtained — which most of the time wasn’t much. At length a high Hertz with a well-insulated feeder turned the trick. And a more cordial, considerate bunch of fellows doesn’t exist than those behind the big, sweet notes in the Eighth District! This isn’t important except to warn others: If you don’t get your first you must and can look for the reason anywhere except in the hearts of the boys you call. Frank H. Pipp, WSBJ answetfs, yu and Helps QST de Easi unit whic ont two

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lo not 1 usual better e, and their but urs to them- »ppor- eld. A eseful ilizing € for worth pme a sed as be an Pp this - field, . PDT ith for- nm ports lander, . Or do iner Mich. est of ythers o the o the same ime a e sta- d ex- tenna d to ed in wers, with ‘il, at ed at otten hered same eally n, lo- andi- g up most lertz trick. llows sweet s: If and 1 the "SBJ Hofiman & Wiix, the well known short-wave experts, wm AERO SHORT-WAVE Automatic TUNING UNIT (Protected by patents pending NO MORE PLUG-IN COIL WORRIES (SHIFT DIAL SET APPROXIMATELY \WALF_ War 65° Tuning Dial at 1000 Wave Length Approxi- mately 50 Meters A Marvelous Improvement FEATURES 15 to 90 up to 200 coils NO PLUG-IN COILS Easiest tuning short-wave receiver known. The tuning wit consists of two controls. The right-hand control, which will be termed the shift control, and the left-hand ee a po = ns a . sail teams 2 = usec in automatic range mtrol, the actual tuning device. In addition to these Resta toutes Gueten Automatic range, meters; full range, two controls it will, of course, be necessary to have a known, Tunes even more regeneration control. slowly than broadcast re For those who desire to employ it for television or the ceiver. Special attachment — sena . ‘ enables it to reach 200 ipper phone band, a special attachment may be secured. ; . Goes . meters. Anyone can operate OPERATION it. The days of fooling with plug-in coils are over. Ama teurs can now have a real thrill by this new automati« tuning device Read _ the The tuner is operated in the following manner: As a specific sample, with the right-hand dial set at nine degrees, revolving the left-hand dial through 180 degrees, you will cover from 19.1 22.6 meters. The next step will be to move the shift dial to 13 complete story in February and tuning over 180 degrees, as before, this time covering from OST and then mail your 1.9 to 25.7 meters. This process is continued through 180 de- order to Aero Products for grees on the shift dial until you have reached the maximum the complete built-up unit utomatic wave length, which is 90 meters. Get this remarkable short You will note that the tuning dial, in the first instance, when tuned through 180 degrees, covers only 3 meters, whereas rdinarily when using plug-in coils your tuner, when passing through 180 degrees, generally vers at a minimum of 25 meters. This same speed of tuning is maintained throughout the ntire short-wave spectrum, and it is for this reason that this tuning arrangement surpasses any known method. This unit is furnished completely assembled to the amateur, and may be uilt into either a short-wave converter or receiver. wave apparatus now For those desiring to go from 90 to 200 meters a special device may be had, making its range then m 15 to 200 meters. Net price, $5.90. (general chart is furnished with each unit, specifying the settings for the shift dial, which will nable you to approximate the wave length for each setting on the shift dial This tuner is not sold through the usual trade channels, but is sold to amateurs only direct from tory at special low net price. Be sure to send post office or express money order for $19.50 wth your order. Shipments will be made in the order received. Be first to der. Attach your money-order to coupon below and mail today —NOW! ERD —0Lt—~t=‘ INCORPORATED ~ | #11 E. Ravenswood Ave., Dept. 370, Chicago | Dear Sirs: I want to be one of the first to secure the new Aero Short-Wave Auto | matic Tuning Unit. Enclosed is money order for $19.50 which is 5 t | low opening net price to amateurs only. am also interested in the following Aero Product | Name | Street and No.. City lee Say You Saw It in QST It Identifies Y ou and Helps QST Aero High- Power Xmitter and 150-Watt Amplifier For operation on 10-20-40-80- 100M. Bands. The first high-power amplifier to use the UX-860 screen grid tubes. New in every detail. 15@ Watts of pure D.C. signals with a stability which has caused favorable remarks everywhere. Flexibility that fills every Ham need Kit No. 52 Including the power supply, but not including tubes. List Price $259.00 Kit No. 53 Less power res and tubes. List Price Aero Bullt-up Short-Wave Sets. D.C. Model, Complete... $60.00 A.C. Model, Complete... $125.00 Aero Listening Monitor Enables any amateur transmitter to check his own note, to know whether it is pure D.C. or not. It is a safe, sure and accurate way of knowing your station without depending upon the reports of others Model M-29 Aero Monitor, in- cluding Dry Batteries, but no tube. List Price $15.00 Aero Short-Wave D.C. Converter, $25.00 Aero A. C. Short-Wave Converter, $25.00 Aero Wavemeter principle of the “series gap,’ condensers, and having a definite fixed minimum capacity, the amateur Wavelength bands are spread over a great many dial divi- sions. The velvet vernier dial has 100 divisions, each of which may be read to one-tenth of a division. List Price, each ... ..» $24.00 Aero Shield- Grid Coils LWT-11 Kit of 3 coils (16 to 90 . .. $11.50 meters)... LWT-10 Kit of 3 coils. List. . . $10.50 Aero Transmitting Coil Kits 2040-K — 16 to 52 meter kit, $12.00 4080-K — 36 to 90 meter kit, $12.00 9018-K — 72 to 190 meter kit, $12.00 71 U sing the

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FOR PURE D.C. POWER SUPPLY P. R. 866 Fil. Volts - 2.5 Fil. Amps. - & Peak Inverse Volts - 5,000 Peak Plate Amps. - 0.6 Diam. 23%” Price - - $8.00 per the new regulations all | :mateurs must use an ade- quately filtered D. C. current R. 866 and P. R. 872, both ury vapor rectifiers, besides ting a wave form easy to filter, furnish a stable source of plate volt- full load or no load, because tubes possess a low and prac- tically constant voltage drop. The ually long life of the P. R. 866 P. R. 872 is due to the low oper- temperature of the oxide | filament combined with the rely low voltage drop result- om their mercury content. these Perryman rectifiers, is for their rugged strength, ringing your station in line he new regulations. ittractive prices for licensed amateurs I ELECTRIC CO., Iwsc., $ I 1.. North Bergen, N. J. ; « find Money order i — check st $18.00 — aoe P. R. 866 at $8.00. ‘ - — i Say You Saw It in QST — It Identifies You and Helps QST More Stringent Regulations for ’Phone? Wheeling, W. Va, Editor, QST: In view of the fact that there seems to be much arguing to and fro relative to the ‘phone amateur and his rights, I thought I would write a few words to Headquarters giving my sentiments. I do not believe that anyone should be per- mitted to obtain an amateur telephone license as easily as they are obtained today. Especially does this hold good for operation on 3500 ke. It must be remembered that modulating signals even at broadcast frequencies is difficult when men are engineers. And then think of the additional troubles when transmitters are set to 3500 ke.! Especially when the operators have little or no idea of theory and never intend to study it. Ifa fellow beginning in telephony would stay on 1750 ke. there would be no need of kicking. I sincerely believe telephony should never be permitted when the amateur has only a tenm- porary license, excepting on 1750 ke. Operating on the present ‘phone band should only be per- mitted when a first-class amateur license, or higher, is held, except in cases when an amateur is extremely isolated from any town of license | examination, whereupon positive evidence of technical ability should be furnished. In the case of c.w. positive evidence of technical ability should be furnished when only a temporary license is held. I do not think the 3500-ke. ’phone band should be widened. The fact is, as stated above, that the majority of amateurs crying for this concession should never be permitted to use telephony, or if permitted should be on 1750 ke. for lack of technical ability. I even believe the phone band should be moved to the upper end of the present 3500-ke. band, retaining its present width, so code stations could work 3500-ke. crystal sets on all three bands. To substantiate the above, it should be noted that the greatest use of 3500-ke. ‘phone is by those who should never be permitted its use. To listen to their poor modulation, poor carriers, poor signals, and poor operating, the whole spectrum would soon be too small for them. I could name a score that know nothing of the principles of amateur radio and who are using telephone, and who do not even know the code. All of these operators have secured their tem- porary licenses through nothing less than pure perjury. In other words, I believe that the amateur should be permitted ‘phone, but only when he knows how to use it. Regulations for its use should be more stringent than for ¢.w. because it is harder to operate at the high fre quencies. After all good operating is only governed by technical ability, and I am sorry to say a bunch of hams have less than zero. Also in the future, as in the past, the A.R.R.L. should make recommenda- | tions that would give the amateur who is really yy»

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Crosley Brings NEW Beauty, Originality, Individuality and Distinction to Radio “| Cabinet Design and Construction few - | The Sensation atAtlantic City An Amazing NEW Electric Phonograph and ‘eas | The NEW Crosley radio receiving sets are Radio Combination Sensationally Low Priced does NEW in every respect. New chassis, new . Va. must power speakers, new cabinet designs, new cabinet n at construction, mew low prices for the big values i are offered and the super-performance delivered. ional Eye-filling beauty, startling originality, distinct individuality, | ke! outstanding performance, amazingly low prices—these describe * the NEW Crosley sets to the extent that it is possible for words r no to do so. Actually to see the marvelously designed and Ifa executed cabinets, to feel the supreme sensitivity and selec- tivity of the sets, to hear the astonishingly true tone of the y on speakers is the only way to gain a full appreciation of these truly exquisite and gorgeous new radio receiving sets. Neither mechanic ally nor from the standpoint of appearance is there er be the slightest ear-mark of anything that has gone before tem- As an example of the beauty, value, originality and dis- ating tinction of the NEW Crosley line, look at The Cros.ey ere ArBITER shown to the right. An electric phonograph and radio I combination at only $137.50! A highly sensitive and selective e, or Screen Grid, Neutrodyne, power speaker, A. C. electric receiv- ing set housed in a delightfully designed and executed cabinet ateur aad plus—an electric phonograph and pick-up. Never before cense has such an outstanding value been offered in radio. The of beauty of the cabinet is self-evident. The latest type Crosley moving coil dynamic speaker is used. The automatic volume - case contrel maintains a uniform volume all over the dial. The bility tubes required are: Three Screen Grid type -24, one type-27, ’ two type-45, and one rectifier tube type -80. Dimensions: prary Only 35” high, 2334" wide, 1434” deep. nhould it. the ‘ssion _or if ‘k of Electric *] 3 iz band Phonograph and Radio Less esent Combination ‘TUBES . code n all The NEW Crostey Pat, illustrated at the left, is another indication of the wonderful eye and money- noted value to be found in the new Crosley receiving: sets. Li rhis magnificently beautiful cabinet is only 2554” high ¢ yet it houses the Crosley NEW Companionship Series To radio receiving set and the newest type Crosley electro- TIeTS, magnetic power speaker. The set is highly sensitive whole and selective due to the use of three Screen Grid tubes. ‘m. I The tubes required are: Three Screen Grid tubes type f the -24, one type -45, one type -80 rectifier tube. At the using ami azingly low price at-which it is offered, The CrosLEey code. Pau will be one of the most sensational sellers the radio cena world has ever seen. Dimensions: 2554” high, 21” wide, 1054” deep. Get in touch with your Crosley pure distributor today! 9 °69 50 SrenGiad the Crosley Radio Corporation Neutrodyne ' > ‘ — — s use Less. Power Speaker POWEL CROSLEY, Jr., Pres. Home of “the Nation's Station” —WLW use it A. C. Eleetrie CINCINNATI, OHIO After rnical = YOU'RE THERE WITH A CROSLEY in the enda- - really : Say You Saw It in QST — It Identifies You and Helps QST

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The True Test is the Test of Time RADIO Z TUBES met the test and proved their faultless overall per- formance for the past fifteen years. nave Standard since 1915 CUNNINGHAM, INC. rk Chicago San Francisco llas Atlanta Say You Saw It in QST — It Identifies You and Helps QST | trying to operate a good station the preference and chance to experiment to the fullest extent, This letter is written without prejudice, and my purpose is simply to submit what I believe to be a cure for a growing evil in amateur radio, C.S. Hoffman, Jr., W8HD One for T. O. M. San Francisco, Calif, Hi! Old Man: Father says it takes the Old Man to get a rise out of mother, and I guess for once he is right. Yesterday was Mother’s Day, and when my son handed me May QST opened to your “Say, Son”’ page and said “Here, Ma, this is for you,” it was the best Mother’s Day present I received. You know, OM, we have moving pictures in our home too, the pictures move to the floor and the frames move to the “‘shack’’; but who cares? The radio mother has long since passed the “ why mothers age”’ stage and keeps in tune with her young hopeful. When she finds the pilot light missing from the B. C. L. set, she immediately goes to the shack | and invariably finds it in the wavemeter. God bless their hearts, what if we do have to go and buy new paraffin every time we make jelly, and hold our breath when they try to reach the sky, putting a high pipe on top of a clothesline pole. Sometimes I think my son could qualify asa flagpole sitter. Then, again, the hams do not al- ways tiptoe through the tulips, but after radio club sometimes tiptoe through the hall to the shack in bunches, looking for DX, and it is then the radio mother has a tough time holding the OM in bed when his slumbers are disturbed. Yes, the radio mother enjoys the QSL cards and can overlook the days when she picked radio tubes, coils and what not from the dinner table, mantel, and every nook and corner of the house. Believe it or not, watching a real ham start at the bottom and go up is one of the best thrills a radio mother can get. Well, OM, here is where I have the last word, and Booth Tarkington has nothing on you when it comes to knowing your hams. Here’s to all the radio mothers, QST and you, OM (not forgetting the cat). — A Radio Mother Mental Fading 354 Hunter Street, Ossining, N. Y. Editor, OST: During the past month I have been spending much of my spare time as a disciple of William James. It is difficult to imagine any subject more remote from radio, and it must be this very remoteness that prompts me to write you these lines, for I have just realized how many times | have fooled myself into thinking a signal was fading when actually there may have been no variation in the signal strength at all. How many | others, day after day, feel like spitting on the | Old Man’s cat because a weak, elusive signal SIL

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‘alif. . Fist ight. * son Say, ou,” ived. es in r and ares? h her n the shack ve to make reach esline fAnd why not? It’s a bang-up little console-quality $112 wired, without tubes—and that includes the Y a8 Trceiver, but every inch of it is especially designed receiver, a hot little speaker that will threaten ot al- for its job. No “toy machinery,” either. Like a to win you back to magnetics for life, battery box, radio [comotive—it’s all engine. brackets, spark suppressors, and everything you o the | Get this: three screen-grid tubes (yes, it’s s.-g. meed to install it. s then power detection)—sensitivity eight microvolts per Tubes required: 3—’24, 1—’12A, 1—’71A. ig the eter—selectivity that slices ’em right off—real The Receiver—S-M 770 Auto-Set (only), factory- |. Yes, feonsole tone—“vest-pocket” size (12"x714"x61%4") wired and RCA-licensed, $79.50 List. Parts total id can fhand direct tuning like its big-brother Silver- $61.40 List. tubes, rshall radios. All there! The Speaker—S-M 870 Automotive-Type Mag- antel, You don’t need a jig-saw to get it in the car, netic Speaker, $15.00 List. sclieve Bither-—it doesn’t even touch the instrument panel. Accessories for Installation—S-M 771 Acces- ottom Hou mount it under the cowl, to the right of the — sories, including all other required equipment nother Briver’s seat. And if you want to take it out to except tubes and batteries, $17.50 List. dein the car, not a mark will show! Get in touch with your jobber for the low-down —_ The cost? It’s way down. The list price is only on price and performance! 1 when The Short-Wave Bearcat Is a Bearcat! d you, Designed to lick anything in the short-wave class, in the list price) cover from 16.6 to 200 meters— ¢737 Bearcat does—and how! Ithastwoscreen- all foreign and American short-wave broadcast- Mother Bid tubes—will reach out and drag’emin bythe ing as well as the ham bands. Four extra coils ls—is plenty selective—and you can spread ($5.50 List) cover the American broadcast band. ¢ham bands without taking the set apart and What more could you ask? bowing half of it away. It’s completely shielded Tubes required: 2—’24, 1—’27, 1—’45, 1—’80. _ . Phas its own cabinet—and its own built-in 737 Short-Wave Bearcat, completely factory- N.Y. Bwer supply! wired and tested, less tubes and speaker, $139.60 Fight specially-designed plug-in coils (included List. Parts total $119.50 List. ending The Radiobuilder, Silver-Marshall’s publication telling [= cee eee Villiam the very latest developments of the laboratories, is too valu- Silver-Marshall, Inc. *t more able for any setbuilder to be without. Send the coupon for a 6409 West 65th St., Chicago, U.S. A. . : free sample copy. If you want it regularly, enclose 50c for is very next 12 issues. . ..Send your new catalog supple- u these 4,000 Authorized &M Service Stations are being operated. pone Se) ene copy of the times | Write for information on the franchise. tp tei send | —_— . as IES 1 riving co lete information on - SILVER-MARSHALL, Inc., SICAGO, a fay yt the Amto-Get and the Bearcat. vw many PENIS 5. n'000sis00senseseseseanseews on the PBI o.i6.cn 00 nteseceenassessseas H » signal ee Say You Saw It in GS7 It Identities You and Helps QST 75 Man, Oh Man —What an Auto-Set!

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_— Weston model 425 7io ther in uments SHORT WAVE Radio Service T is yet little aware of the func- rt wave radio which occur in that ! »w 200 meters where the middle ition — the broadcasting station uired. But science and engineer- appreciate its multitudinous 9 weather reports and beacon irine — for land and sea com- railways — for long freight hauls ervice — for coast guard boats, for police alarms and for all d commercial uses where quick onversational contact is essen- | hort wave communication is now rue. of short wave transmitters it is loy a radio frequency ammeter re the amount of energy im- ntenna. In industry, also where currents are used, such as in tubes, and induction furnaces, instrument is required. It is in television, by manufactur- f radio apparatus such as crystal nt and, of course, by amateur world over. ices the preferred testing equip- the Weston Model 425 thermo le as armmeters, milliammeters meters, together with accompany- rs Model 301 for D.C., and Model All instruments are matched earance — 34% inch diameter — nounting. vice lete de scriptions and Circular JJ te for WestonElectricalInstrumentCorp. Newark, N. J. Westo,~ PIONEERS | os SINCE 1888 INS STRUME 602 I linghuysen Ave. TS) seems to drift in and out of audibility, appar. ently due to unavoidable QSB, when actually the trouble is not with magnetic storms, atmospheric conditions, wave polarization or other causae psychosi, but with the thin layer of cortical cells overlaying the brain of the operator himself! Psychology gives us a very interesting descrip- tion of the power of “paying attention” and it may explain away many instances of annoying QSB. Let us assume that we are listening to a very weak signal from a crystal-controlled transmitter, We can barely distinguish the dots from the dashes. We concentrateourattention upon the sig- nal. Perhaps we close our eyes or darken the room, and we find that this helps. (It shuts off light-stimuli that would produce sight-sensations to interfere with the sound-sensations, thus elimi- nating a great obstacle to concentration.) First we are able to catch several words, and then the signal seems to fade out and we miss several words. In a few seconds the signal seems to fade in and we catch a little more. This continues indefinitely. Now psychologists tell us that attention is a state of consciousness which cannot endure over any but the shortest periods. In fact the average person is able to concentrate for only 5 or 6 seconds at a stretch. Oftentimes when we seem to be attending for a long period of time to some one thing, our attention is really drifting and wander- ing all over the background of our mind without our knowing it. When we find it hard to concen- trate, it may be some consolation to know that no one has ever succeeded in maintaining strict attention over stretches of more than 24 seconds. To a psychologist the reason for this is simple, and by an apt analogy any radio operator may understand it. The control brain cells receive the sound-sensation telegraphed over the nervous system from the ears in the form of a charge, and immediately “explode,”’ just as an electrolytic condenser receives a charge at a pressure so great that the dielectric punctures or “explodes.” When a cortical brain cell explodes we “get an idea’; i.e., we are conscious of hearing a signal. Thus, each dot and dash is telegraphed over a nerve fibre from the ear to the brain, and ex- plodes a cortical cell. When a cell has exploded it must take time to recover; it cannot explode again until its “dielectric’’ repairs itself so it can hold another charge, just like the electrolytic condenser. When these cells are repairing them- selves they will not respond to sound-sensations, and we are not conscious of hearing any signal until some sound cell in the cortex starts working again. That is why attention is interrupted, why we can concentrate for only a few seconds at a time, although we sit and stare into the darkness for hours at a stretch, “concentrating.” The spurts of our attention correspond to the succes sive explosions of cortical cells, and as our atten- tions spurts, the signal fades in and vice versa. If anyone should doubt this, here is a simple experiment to prove that attention is inter rupted, not continuous: 6 Say You Saw It in QST — It Identifies You and Helps QST

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Dar- the eric usae cells self! Tip- id it ying very tter. the ’ sig- the 8 off tions limi- First 1 the veral fade inues is a over eTage or 6 ‘m to ¢ one nder- thout ncen- that strict onds. mple, may e the rvous », and olytic great yes.” ret an ‘ignal. ver a id ex- ded it cplode it can -olytic them- itions, signal orking l, why sata rkness The succes atten- rsa. simple inter- @! “FES. LEN t is we ee Des the Solution of Your Condenser Troubles ON’T worry about condenser prob- Pretacted vant, rlcanisd i hard lems. If they involve 8 MFD or more — | —let the Sprague electrolytic condenser Premee ses! wah se pocntlity os of cummng gocher, oo, Sah 6 5 take care of them. For this new, perfected condenser is the most adaptable and efficient — unit you ever saw. Only 134” in diameter imam, 00 welded o vated joint. and only 5” height overall. Yet it rates —— 8 MFD capacity with peak voltage of 430 DC. It has an exclusive, one-piece, round-edged mo he Fy anode without a single soldered or welded —— joint anywhere. The individual screw socket mounting makes it easily adaptable to use in any set. Shee ee ctey mem Mates steer Core wk And because of the Sprague standardized | unit Construction—you buy just the amount of capacity you require, without paying a premium for useless excess or for “special built” jobs. Write for iMustrated folder on the Spreque electrolytic condenser. SPRAGUE SPECIALTIES COMPANY QUINCY, MASS. Manufacturers also of the well-known ONDENSER UE PAPER C a Capacity & MFD Peak Voltage 430 DC Gu / Cgalive Say You Saw It in QST — It Identifies You and Helps QST 77

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*Y INCREASING NUMBER BROADCAST STATIONS AMATEURS, EXPERIMENTAL LABS ARE USING eLECHTHEIM EXCLUSIVELY SUPERIOR CONDENSERS REA N 41— H HEST QUALITY Onl he very be naterials ar ] and ther ily after the t rigid te They ; TYPE VM 200-2 MFD. DO i up! 5000 V D.C.-3300 rms RAC Send for Catalog $22 M. FLECHTHEIM & CoO., INC. Street New York, N. Y. (HE A.R.R.L. LOG SHEET Regulations Require Station Log uteur station regulations of the Radio Commission, announced in oblige every amateur station to 1 log of operating activity. Every ht to keep a log. A.R.R.L. has ng it for years. Now it becomes under the regulations. t log gives proof of station trans- It is sawed m in checking up the your work. Its presence identifies as a systematic one. The Govern- v requires it as a record of transmit- irchased now in large quantities, f the Log Sheet has been substan- 1. The new low prices: ets . 50e ts ...-91.00 ts +. nae Post paid ) THE AMERICAN RADIO RELAY LEAGUE U.S.A Hartford, Conn., U.S.A. Say You Saw It in QST’ — It Identifies You and Helps QST Seat the subject blindfolded in a chair, so that he sits sidewise to the length of the room. Hold watch at the level of his ear, and remove it untij its ticking is only just audible. As he listens the sound will alternately disappear and reappear, Let him lift his finger at each disappearance, Count off on the watch the number of seconds between successive disappearances. Compare the interval with the interval between “fading” signals. Of course there is no remedy for this kind of mental QSB, but it may be a consolation to some operator of a crystal-controlled m.o.p.a. to know that it is probably the brain of the operator on the receiving end that is fading, and not his trans- mitter. — Earl Peacox, ex-W2ADH More Truth Than Fiction 75 New Haven Avenue, Milford, Conn. Editor, OST’: Just a few words about thirgs in general — especially 85-meter ‘phone. There was a time once when you would only hear about thirty ‘phones in any one day and everyone was having a good time working the same fellows; in other words, just like a great big family. (Ask W2GJ — hi.) Then suddenly everyone else goes "phone- crazy and now look at the band! At least ninety fellows on regularly, and who works whom and how is more than most of us can figure out. | can’t now — I used to. I overheard some 'phone man once disserting on handling traffic on ‘phone. He said that he couldn’t see anything in it. But look at what some fellow out west in the wide open spaces (thank Heaven there are a few in that ‘phone band!) did on the band with traffic — made the B. P. L.! I myself handled over fifty messages on the ’phone outfit with W1AJI at Naugatuck, who is one of the best traffic men on ’phone within the State. All these in two nights. Alas for the phone band! After a very pleasant two months on the air, my poor 250 and 227 stand deserted in their sockets, while ye 210 is up to his neck in milliamperes down on the good ole twenties where you can come up for air whenever you feel like it. Guess that’s all this time but maybe I'll find something else to spill soon. — Emil F. Scholz, W1AMQ-W1FJ LA.R.U. News (Continued from page 50) is ever handled by these stations we can’t help thinking it rather unnecessary to spoil our bands in this unscrupulous way. GREAT BRITAIN By J. Clarricoats, Hon. Sec’y R.S.G.B.* It will be remembered that in our last notes mention was made of the fact that our licensing authorities had once again opened up the 80 ~ 1.

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that old a until S the pear, ance, ‘onds e the ling” nd of some know in the rans- ADH L ‘onn. ral — time thirty aving other GJ — hone- vinety n and yut. [ erting iat he what spaces phone le the yes on <, who in the pasant stand to his rd ole pnever ll find WiIFJ 't help - bands x t notes -ensiNg he 80-

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Say You Saw It in QST — It Identifies You and Helps QST meter band for week-end work. Since that date some 150 of our members have received permis- sion to operate on this useful band, and as result considerable activity is anticipated. Arrangements have been made to hold the Annual Convention in London on September 26th and 27th. As in previous years amateurs from all countries will be heartily welcomed to this gather- ing. Intending visitors are requested to advise the Headquarters of the R.S.G.B. at 53 Victoria Street, London, S. W. 1. The Annual Radio Exhibition has been fixed to take place between September 19th and 27th, so that visitors to the Convention will be given an opportunity of attending at Olympia. The recent 2S-me. tests organized by our Con- tact Bureau Section were successfully concluded during May. The winner of the transmitting trophy was W. H. Winchcombe, G6ZH, whilst Miss B. M. Dunn, G6YL, won the receiving price. The experimental section propose organizing their next 28-me. tests towards the end of 1930. Detailed announcements will be given shortly. Conditions on 14-me. during May were again poor for the period of the year, and no outstand- ing work can be recorded. On 7-mce. local ‘“‘blanketing’’ was pronounced but moderate DX was workable. Information concerning the Society can be ob- tained from the Honorary Secretary at the above mentioned address. The following Norwegian notes combine the reports for both April and May, as both were re- ceived within the month: (Continued « nige SS The Third International Relay Competition Continue 1 from page 21 Belgiun Egypt ON4BC $2 SUSRS...... 9 Phil Pi e Is. Irish F Stat KAICY.. 28 EISB... 8 KALHC.. Spair va Denmark , BARST.....0:: . wa O47. West Africa ee 14 FQ-PM .. 1 Say, Son— (Continued from page 22) what was left into the port of Algiers and told the head devil there that if ever again an American ship was molested he would come back and bust the entire place wide open. A treaty was signed with some penalties in it that would make you think you had got a shot of bad home-brew. Steve ambled on along the coast, found some

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on- led ing ilst ice. ing 30. tly. ain nd- ob- ve" the the can yust ned vi yu yme Ideal A New type SE-100S. W. Condensers. Insulated bearings, constant im- pedance pigtail, straight frequency line plates. L The coil-forms used in the new THRILL-BOX are made of R-39,thelow- loss coil-form material recently developed by Radio-Frequency Labor- atories. mateur Receiver ! DOUBLE SCREEN-GRID Full A. C. operation — NO HUM, even on phones. Easily adapted for wide spread of Amateur Bands. Dial and Condenser construction elim- inates “clicking” on higher frequencies. Completely new design by NATIONAL Co., Engineers in collaboration with Robert S. Kruse. Made also in new battery Model, using the new UX 230, 231 and 232 tubes. SpecialS.W. Power-Pack, licensed under RCA Patents. Send for new Amateur Bulletin No.141. NATIONAL CO. INC. SHERMAN, ABBOTT AND JACKSON STREETS, NEW NATIONAL A-e Co THRILL-BOX Easily assembled by anyone with genuine NATIONAL Radio Products MALDEN, MASS. ST Oscillating Crystals REDUCED PRICES EFFECTIVE APRIL Ist, 1930 AMATEUR BANDS: Summer is coming, and no doubt you are going over your transmitter removing those weak links so as to get the most possible efficiency from your set. One item of great importance is the frequency stability of your set. Does it stay on one frequency? If not, our power crystals will solve that problem. SciENTIFIC Rap1o SERVICE crystals are known to be the best obtainable, having ONE single frequency and highest output. With each crystal is furnished an accurate calibration guaranteed to better than a tenth of 1% New prices for grinding power crystals in the amateur bands are as follows: $15.00 (unmounted) .$20.00 (unmounted) $40.00 (unmounted) 1715 to 2000 Ke band 3500 to 4000 Ke band — 7000 to 7300 Ke band. ..... BROADCAST BAND: Power crystals ground in the 550-1500 Kc band 1ccurate to plus or minus 500 cycles of your speci- fied frequency fully mounted for $55.00. In ordering please specify type tube, plate voltage and operating temperature. All crystals absolutely guaranteed regards to output and frequency and delivery can be made within two days after receipt of your order. CONSTANT TEMPERATURE HEATER UNITS: We can supply heater units guaranteed to keep the temperature of the crystals constant to better than a tenth of 1 degree centigrade for $300.00. Two matched crystals, ground to your assigned frequency in the 550-1500 Kc band with the heater unit complete $410.00. More detailed description of this unit sent upon request. ATTENTION AIRCRAFT AND COMMERCIAL RADIO CORPORATIONS: We invite your inquiries regards your crystal needs for Radio use. We will be glad to quote special pricesfor POWER crystals in quantity lots. We have been grinding power crystals for over seven years, being pioneers in this specialized field, we feel we can be of real service to you. We can grind power crystals to your specified frequency accurate to plus or minus .03°%. All crystals guaran- teed and prompt deliveries can be made. A trial will convince you. SCIENTIFIC RADIO SERVICE “THE CRYSTAL SPECIALISTS” P. O. Box 86 Dept. P-12 Mount Rainier, Maryland Say You Saw It in QST It Identifies You and Helps QST

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Are YOU ENGINEERING INSTITUTE ® Radical improvements that meet Modern Demands. n this New Rheostat perates the HH Tubular Rheostat | knob automatically disengages screw pid sliding. Release restores screw s soon as knob is turned, ment mechanism is self supporting, self | No binding cr bronze contact shoe maintains firm | re but cannot tear it. for COMPLETE DETAILS UBULAR @RHEOSTATS IARDWICK, HINDLE, INC. Newark, N. J. Emmet St. w further success in Radio? ough experience to know that nothing, something worth nd in your name and address 1 our new booklet, MODERN bing an advanced course in RADIO ENGINEERING —a cing studied by hundreds of ex- in all parts of the world —a onducted by engineers with in practical radio work and in ADVANCED RADIO. \PITOL RADIO Incorporated Mt. Pleasant St., N.W. Washington, D. C. Say You Saw It in QST — It I Tripolitan pirates and put on the same act with them. At Tunis he played another one-night stand and then, washing up, came on home. In 1815, when Steve got home, they gave him a blue silk flag. This identical flag is the one that hangs in the auditorium at the Naval Academy to-day. Don't any ham with red blood in him ever go anywhere near Annapolis without going to that flag and standing at salute just a moment, The instrument of torture hanging on the wall at A.R.R.L. Headquarters and the instrument of torture shown on Stephen Decatur's flag are suspiciously alike. Their meanings are exactly alike — a he-man type of law and order, or the works. And now, you all ask, whence came our | Wouff-Hong? Thereby hangs another tale, lads. “The Old Man. im The Operating Characteristics of Vacuum-Tube Detectors (Continued from page 28) of two tubes of this type as grid detectors under similar operation conditions. A greater variation than in the case of plate detection is evident, as would be expected from the greater variations in grid characteristics of the tubes. The effect of changing the percentage modula- tion of the input signal upon the detector output and gain is shown by the curves of Fig. 16. It is apparent that the output, and hence the detector gain, is directly proportional to the percentage modulation as long as the detector is not greatly overloaded. (The second and concluding part of this article will appear in the next issue. — Eprror.) The Hudson Division Convention (Continued from page 42) And then came the distribution of prizes to those who participated in the stunts; also attend- ance prizes. The prizes far exceeded the antici- pation of the Committee, but lack of space pre- vents us from giving the names of all the con- tributors; proper acknowledgment is, however, made and appreciation expressed to all those friendly manufacturers who helped so much to make the convention a success The report of this convention would not be complete without extending the thanks of all the delegates to Dr. Walsh, A. O'Hara, Ed. Finck, Dave Talley, Frank Frimmerman, C. E. Sargeant and other members of the Committee for making possible the best convention ever held in New York City. -A. A. H. lentifies You and Helps QST "S| [7a ..|\I-

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im lat im ng all of ire he ur is. — plate supply. their life. 1. Protects the filter condensers from 3. high peak voltages, which lengthens Vitrohm Stabilizing Resistors When the plate potential of radio transmitters is supplied by filtering rectified A. C. it is common practice to connect a stabilizing resistor across the output of the The advantages are: 4. Discharges condensers when key is Tends to eliminate chirps. open. 2. Steadies the note. 7 Output Total rs . Send for circular 507, de- “ ; itrohm Resistors scribing Vitrohm Resistors } oltage Resistance Vin ater dhoams uaen 250 25,000 ohms 1—Cat. 507-65 request. 550 50,000 ohms 1—Cat. 507-68 You will find in this cir- . ‘ ‘ cular Vitrohm Resistors to 1000 50,000 ohms 2—Cat. 507-65 in series — oy Gee aye 1500 60,000 ohms 3—Cat. 507-5 in series 2000 80,000 ohms 4—Cat. 507-5 in series WARD LEONARD ELECTRIC CO. Mount Vernon, New York TRANSMISSION CONDENSERS \ / Send for interesting data and price sheet on Transmission Condensers with working voltages up to 3000 D.C. for use with the following tubes: 203A, 204A, 210, S500W, YY) 851, 852, 860, 865 CORNELL ELECTRIC MFG. CO. Long Island City New York \ | AL UM [NUM GENUINE ALCOA STOCK ANY SIZE TO ORDER MONITOR SIZE 6” x 10” x 7” $3.25 BLAN, The Radio Man, Inc. *’ Son*voas Sireet Send for a copy of our latest Radio Bargain Bulletin No. 31 AW-!I NEED A FILTER AN’ 1M ALMOST BROKE Z @ELLQ MIKE WHATS American Sales Company Look! AT THIS BARGAIN BULLETINY, FROM AMERICAN SALES CO. FILLED Y WITH CHOKES, CONDENSERS AND “HAM SUPPLIES AT A FRACTIONS xs OF THEIR COST, _~ seeenes Z YY 19-21 Warren Street New York City Say You Saw It in QST — It Identifies You and Helps QST 83

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ADIO ARGAINS LY GUARANTEED ‘ y replacement guarantee, No. 210, $2.35; No. 281, $1.85; No. 280, 95c; $1.25 224, $1.25; No. 227, 75c; No. 226, iL? - OO a waptable for phone or code. $14.75 be complete with 5 coils, 14 to $6.4 ransmitter, h ets r t a 3-227 tubes, single cial, 20.0 Fits any car t and { ompact arisom telephone transmitter on desk $2.7 B cr. De 180 volts, will operate up to 10 tube fully guaranteed $6.75 ywer Condenser Blocks, 12 Mfd., 1000 t ed 2,2,2,4.1 and 1 mfd $4.75 enser Packs, 2000 volt A. C. test $7.90 $3.80 Dou kes, 30 henry each, 160 wmils., 1500 vt t $4.95 $3.75 P Filament Transformers for 226, 227 and hoke $4.00 No ver ooo V. Transformers, shicided, Sec 0, one 227, four 226 tubes and A‘ ‘ Power Packs, completely assembled, $8.75. A. ( filament for up to 9-tube set nator. Make your battery set all r ( set around this pack. k, 95c¢ extra. $1.00 Th Transformers, 1 tol CHAS. HOODWIN Co. 4240 Lincoln Ave., Dept. H-8, Chicago, Ill. DEAI * IN BANERUPT RADIO STOCKS A, hy Le Mi, Ml, Mh, Ml, Ml, A, A, Mn, Mn, A, A, Ml, dr, VvyvVvVvvvvvvvvvvvyv Frequency Measuring APPARATUS — Amateur Band Frequency Meters Precision Wave Meters General Purpose Wave Meters INVESTIGATE WHAT REL HAS TO OFFER Write fer FREE LITERATURE 4 REL 50-Page Leose Leaf Cata- log covers everything Get Yours! Price $0c + RADIO ENGINEERING LABS. INC. 100 WILBUR AVENUE LONG ISLAND CITY, N. Y. Say You Saw It in QST — | It Identifies You and Helps QST W9ANZ (Continued from page 48) A large number of reports have been received via mail, about two-thirds of which were from amateurs not worked or from short-wave BCL’s. One of the latter wrote as follows: ‘“‘I heard your station W9ANZ in communication with another station whose call I understood as CQ. Please verify”! LA.R.U. News Continued from page SO) NORWEGIAN SECTION By G. H. Petersen, Vice-Pres. N.R.R.L. During April we organized local sections of our League in Oslo, and in Bergen the hams have long ago united to form a Society. While the number of Norwegian amateurs is still not very great, we sincerely hope that the formation of Sections to cater to the social side of the League work also will stimulate interest between members and non- members alike. Our second WAC member is LAIW. He is a very active amateur, and incidentally has the first transmitting license issued and still in force in this country, so his WAC will be well deserved. His report points out that conditions on 14-me. have been very bad during the last weeks, at least for DX, nothing but European contacts hav- ing been made. However, our President, LA1G, disagrees with him, still keeping up his list of ZL and VK’s, and now deeply regrets that the world was not made bigger! The Oslo gang has got a powerful addition in LA1H, the Oslo Sailor School, who with its 500 watts is working all the world. The Bergen gang also is still getting out. LIAR now works exclusively on 14-me. and for DX, re- cently ‘‘made’”’ two ‘“‘W’s”’ in an evening. We are making our best efforts to improve the QSL service to Norway, asking all other hams to cooperate. Conditions during May, as judged by our re- ports, have been distinctly bad, the only QSO’s reported outside Europe being Australia and South Rhodesia by LAI1G. However, the activity among Norwegian amateurs luckily shows no tendency to decrease with the approaching sum- mer, several of our boys striving hard for the WAC Club membership. The general movement to the 14-me. from the congested 7-me. band is still going on. Wonder how the 14-me. band will be in some months if the movement is general? Our bi-annual General Meeting will be held at Oslo on August 9th and 10th, and we will try to combine it with a hamfest of the latest pattern. We want to repeat our invitation to all foreign hams to join us, if they should happen to visit our Land of the Midnight Sun at that time. In this connection we want to present our thanks for kind invitations to several conventions and con- gresses this summer. We certainly regret that we are probably unable to send special delegates, but

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ur ng of we to So n-

— «! NEW GOVERNMENT REGULATIONS! “ Adequately filtered D.C. power supply or arrangements to produce equivalent effects must be used.” (Copied from O ficial Broadcast N R338, April 4.) One sure way to comply with these new regulations is to put an ESCO Motor-Gen- erator behind your trans- mitter. They are not expensive and they give you ‘“‘More Miles per watt.” Write for bulletin 237G, listing over 500 combinations. If you haven't already re- ceived your copy of Filter Facts write for it today — its yours for the asking. . PO ‘y 225 SOUTH ST. STAMFORD, CONN.

Manufacturers of motors, generators, dynamotors and rotary converters

Ne] METALLIZED fs ‘| TRANSFORMERS ~~ Guaranteed — Mounted — Complete =. | 2 kw 2000— 2500 each side (oes ones eeeeseseneen $40.00 | 700 watt 1000 — SY GI ais non 60 ar ceeneseensn 14.50 | 250 watt nt $10.00; mounts QST Binders have been distributed within a SHOULD BE Were? comparatively short period of time. They must Ge BYGOSH/ 1AM GoNNG GEN a BiNDER!

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A splendid tribute to the reference value of ——_ QST, and an indication, we believe, that you should resolve to keep past and future issues => QST BINDER 2 $1.50 each postpaid 1711 PARK STREET OST HARTFORD, CONN. —

Say You Saw It in QST — It Identifies You and Helps QST 85

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ies Super Akra-Ohm

Resistors | calibrated with precision to insure an pecially adapted and highly recom controlling the complex and ired in the radio, audio, visio and of the electron tube and photo-clec- valuable for Laboratory Standards, perly tors, Telephone Equipment, Grid and $|x$ $/,3[43 5 ; -IS2I8S2V\ise ‘ L192 |S %2 [22/8 Z: at ux r 5! 9 250 500 1000 — Volts completely describes with Bulletin sont many charts and diagrams ses for Super Akra-Ohm Resistors. nd for your copy today. It’s Free SB allows ompany RB - t he ELE CTRICAL SPECIALTIES ARKER AVENUE Collingdale, Pa : SJ

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Say You Saw It in QST

| bers in all parts of the African continent, and our

i It Identifies You and Helps QST have passed the invitations to our members, ip case anyone might be able to attend. SOUTH AFRICAN SECTION By A. Loquet, Hon. 1.A.R.U S.A.R.R.L, The Fifth Annual Conference of the South African Radio Relay League was held at Durban on April 18, 1930. It was very successful from every point of view and a large amount of business was dealt with, including the drafting of a new constitution. This was necessary owing to the rapid growth of our League during the past two years. We are now over 300 strong and have mem- . Sec’y, ranks are still rapidly growing. “QTC,” the official organ of the S.A.R.R.L., has also improved wonderfully during the past year, and every one should give a vote of thanks to those responsible for its production. The delegates to Conference were the guests of Div. 5, and those of us who had the pleasure of enjoying their hospitality will long remember it. At the Conference Dinner our President, Jo- seph White, broadcast his speech and told the pub- lic a few things about amateur radio and the S.A.R.R.L. which were good to listen to. The Conference sends greetings and good wishes to kindred societies and amateurs the world over. Having concluded the Reports of the National Sections of the I1.A.R.U., we are happy to present for the information of the membership the fol- lowing report regarding Jugoslavian amateur activity, which is made up of excerpts from a translation of a letter to the 1.A.R.U. from the Udruzeni Jugoslavenski Radio-Amateuri, in connection with official business of the Union. “‘Our Section started under Austria-Hungary in 1918, and after that year many nations were

united into what we call Jugoslavia. On account of the war we could not have any outside contacts and worked among ourselves. On account of the tension after the war amateurs did not get much attention regarding licenses. We therefore trans-

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A brand new line of tra we Acme has a new line of trans- formers and chokes — 43 different items. Just drop a card today to the Acme Apparatus Corporation, Cam- bridge, Mass., Dept. Q-2, ask for Bulletins 110, 111 and 112 and learn all about this new apparatus. SEND FOR THESE BULLETINS TAY 0) CLO) ACME ~ for transmission nsformers and chokes Since vacuum tube transmission began, Acme has been making trans- formers and choke coils, and every- remembers the one Acme Spark Transformers in the early days.

Do you know that the latest Handy and Hull Handbook is available in bound form — $2.00 per copy, postpaid. When ordering a copy of this new sixth edition, look at your present copy and determine if you want your next copy tn more permanent form.

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Cc omplete in every detail 2 Kw. output 10 to 30 meters stage amplifier. 2—5 Ke 110 v. dc. motor generators furnishing flament and plate voltage. Reserve parts, 5 extra tubes, 2 steel switchboards, regulators, measuring instruments, starters, cables, etc. Ideal for colleges, experimenters, ships, etc. Price only one-third factory list information to: — Mr. Charles Mitchel, fi-* move | 605, 347 Madison Ave., N. Y

QUARTZ OSCILLATING CRYSTALS Scientifically Prepared for Maximum Power and Unconditional! pone n. square sections, (within % af 1°/o af your apocthed frequency supplied promptly at the following prices

75-100 meters . .$12.50 10@-200 meters pe . 900 20@-600 meters - .. 15,00 1 in. Tested blanks, 200-400, 400-600 meters..... 4.00 Dustproof Bakelite mounts 3.00 (An accurate Calibration furnished with each cryst< aD Sections of any practicable dimensions made to order (Charges for grinding to exact frequencies given on request) J.T. Rooney, B. Sc., 4 Calumet Bidg.., Buffalo, New York ‘ifteen years’ crystallographic experience’ ““A pioneer crystal grinder "’

Motors 1 versible 30 H.P. back gearex

(Socony oil burner type) has over one BARGAINS — ARMY & NAVY RADIO SURPLUS Ammeter, R.F.O., 10 amp. zero adjuster. 4 in. diameter. A real buy at $6.5 1 110 A.C. variable sveed, auto re- thousand uses, a

_very good buy. Regular price $35.00 $7.50 | West. Elec. Dynamotor, C.W. Edison storage battery cells, nickel alkali, 225 amp. hour, 1.2 volt | 927, ‘two D.C. 32/350 volt type A-6, weight per cell yy tae $4.00 dynamotors in noiseless han- Western Electric Condenser 21 AA, 1 MFD 1000 volts. . $1.00 gar. Used in parallel gives 160 Keys, transmitting, Navy, back connected on bakelite base. 2 kw., mils at 350 volts, senes gives 8 h silver contacts .. $5.00 : -7encn 4 a 2, | 20 mils. 700 volts, suitable Keys Navy, \” silver cont: acts . $1.50 | for xmitters and receivers. Relays, West. Elec. types, 1 AB, 122-DH, 149-T, 172-B $2.50 | New low price $20.00 Relays 2 and 5 kw. (110 or 220 voit) 4 silver contacts... . $7.50 . Air compressors, Kellogg, Model T. 1% cu. ft. per min., weight 6 | Condenser, Dubilier, mica, op Ibs., 600 R.P.M., 125-lbs. Requires 4 h $3.00 volts 8500 cap. .004 $10.00 Generator, airplane, Signal corps, with shi te, can be used as motor, | West. Elec. swtchbd. control 12 volt 33.6 amps 5000 R.P.N ‘* 1 panel for above dynamotors, Generators, 12 volt, 60 amp. has automatic controls ‘ $20. | has switches, 0-50-500 volt- Motor ee nerator, Croc ker Wheeler or «Holtzer Cabot, 110 D.C meter, complete filter system, 220 A.« 500 watt, 500 cycle. Ball bearing $50.00 etc. Special $8. Lighting Switch, High Grade W.E. Ampere hour meter, Sangamo, battery charge and discharge, type VY Dvynamotors General Heavy Copper Blade and Contacts MS 0-500 scale, capacity 15 amp. A 00 | Electric 24/1500 volt. 233 Sz 7x8 x 6 high. While they Transformers, General Electric, 125 to 2500, with primary cents | | mills. last, tap, 60 cycle, 200 watt Largest Radio and Electric Supply House inWW. your particular requirements. Sufficient postage S. specializing on Army and Navy Gute, and deposit of (Extended Shaft— 50 | $3.00 extra) $37.50 Write us 20% required on C.O.D. orders. NO C.0.D. ON CANADIAN ORDERS. DUE TO LIMITED GOV'T SURPLUS WE DO NOT ISSUE CATALOGS. MANHATTAN ELECTRIC BARGAIN HOUSE, Dept. Q, 105-7 Fulton St., New York City Say You Saw It in QST — It I lentifies You and Helps QST 87

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ACME WIRE PRODUCTS ils Magnet Wire Wound Ma Wire All Insulations Varnished Insulations Par Filter and By Pass Condensers ide to Recognized Com- ls including those of: | Electric Mfrs. Assn. \lanufacturers Assn. Society for Testing Materials 25 years manufacturers and rgest and most discriminat- THE ACME WIRE CO. NEW HAVEN, CONN. Branch Offices: ( k Cleveland 2 \ lerbilt Ave. Guardian Bldg. Chicago 842 N. Michigan Ave. on om soet HALLS “.™ eded in construction of your xmitter or SPECIALS eCo Tubes Guaranteed Firsts Q a7 70°; off Neon © 224 tubes 79 7x22 er Wire 100 ft. 36c G. I tandoffs i2c New 430 v., 8 mfd. cond. $1.50 COMPLETE LINES OF Ner theim, Jewell, Readrite, Pilot, Sangamo, Hammarlund, Ohmite, Fleron, Bradley, Fr eforest, Ellis, Fahnestock. WE PAY THE POSTAGE Cata ree Lowest Prices mitted without licenses. In 1924 we had contact with YS7XX in Ragusa. In 1926 YS7KK ip Velika Kekinda, YS7TMM, YS7DD and YS7X0 in Zagreb joined the above-mentioned station, The military station YS7WW joined also. It was located in Petrovaradin and worked amateurs. After a time we had the best stations in Europe and everyone was interested in us because of this Most of our transmitting was in the Balkans and we were working ‘under cover.’ “After 1928 the stations EJ700 and EJ7QQ in Zagreb and EJ7SS in Belgrad joined us. The Central Station for the short wave transmitters in Jugoslavia is EJ7KK in Zagreb. ‘In the same year we tried to get permission from the Postmaster to license our stations, but received a negative answer. ‘“We received QSL cards from Wien ‘ via Radio- welt.’ A notice was printed in a magazine and we got into trouble with the Government. ‘“*The station EJ7SS in Belgrad read the notice in the magazine and warned us so the Commission could not find anything. After this the Govern- ment did not make any more trouble for us. We wanted to organize a society but the Govern- ment would not give us their permission. We got together and drew up a constitution on December 23, 1929. “The results of the organizing of this society depend on propaganda and we cannot tell what they may be.” The stations listed on the letterhead of the society are these: 7AA, 7CC, 7DD, 7FF, 7GG, 7JJ, 7KK, 7LL, 7MM, 7NN, 700, 7PP, 7QQ, 7RR, 78S, 7UU, 7VV, 7XX, 7YY, 7ZZ. The address is Poslovnica: Zagreb, Puskanac 15B-22. It should be borne in mind that these stations are not officially licensed, and all communica- tions, QSL cards, ete., should be sent under cover. WWV Seandard Frequency Schedules HE Bureau of Standards announces a new schedule of radio signals of standard fre- quencies, for use by the public in calibrat- ing frequency standards and transmitting and receiving apparatus. The signals are transmitted —E —EE ED v t E , S MY BIRTHDAY and LAST OPPORTUNITY E INSIDE BACK COVER THIS ISSUE OF QST ath OST Circulation Manager BECOME A RADIO OPERATOR See the World, Earn a Good Income, Duties Light and Fascinating LEARN IN THE SECOND PORT U.S.A. Radio Inspector located here. New Orleans supplies operators for the various Gulf ports. Most logical location in the U. S. A. to come to for training. , Our students qualify for the various branches of radio. Runs to all parts of the world. Positions Ashore and Afloat. Special courses. Day and Night classes. Enrollany time. Oldest and Largest Radio School South. Literature on request. GULF RADIO SCHOOL 844 Howard Ave. New Orleans, La. Say You Saw It in QST — It Identifies You and Helps QST and Wit!

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tice sion got ber iety hat the GG, QQ, The 99 ions ica- ver. S.A. ipplies cation radio. A float. me. La. (IE You WANT To BE SITTIN PRETTY- THEN~ USE THE COMPLETE THORDARSON ELECTRIC POWER SUPPLNY- ES you’ LL HV A (930 ose SIGNAL: OM , PMDH= Huron, Kingsbury and Larrabee Sts. THE BEST IS NONE TOO GOOD FOR YOUR TRANS- MITTER — / USE THE BEST. A REMINOER — WE STILL HAVE AN AMATEUR LOG BOOK FOR THE HAM WHO DID NOT GET ONE OR THE BEGINNER WHO WANTS TO KNOW, WHATS [IT ALL ABQUT, 50 SEND IN YOUR OSL CARD OR LETTER. iT HAS A LOT OF GQOD HAM DOPE IN IT THAT YOU CAN USE, JUST senieabesied U.S.A. FOR SHORT WAVE WORK! VTX 852 VACUUM TUBE EXCHANGE RIDGEFIELD, N. J. Dealers — Leeds, N. Y. and Others 75-watt transmitting tubes. Thoriated filaments. Tantalum plates. Long life. Guaranteed! MICROPHONES EVERY SIZE AND PRICE FOR EVERY POSSIBLE USE Also Accessories and Repairs Dealers everywhere Universal Microphone Co., Ltd. Inglewood, Calif. For Commercial Stations Oscillating Quartz Crystals For Dealers For Amateurs POWERT YPE arta ARE RECOGNIZED THE BEST No off frequency pa. m with a POWERTYPE crystal Guaranteed — easy oscillators, carefully selected for and ground to your stated accurately to Maximum output, Irequency which its tenth of one percent. approximate within one- 1715-2000 Kilocycle band $10.00 3500-4000 Kilocycle band 15.00 One-inx h oscillating blanks 4.00 Dust pro of, plug- in Crystal Holders je als supply ‘ ‘POWERTYPE'’ and commercial stations With all crystal blanks we furnish grinding instructions. FREE “CLEAR AS A CRYSTAL” American Piezo Supply Company os 6.00 * crystals to broadcast obligation, nm crystals, heater ovens, etc. Simply send name, no for full inform: tio on holders, blanks, 1101 Huron Building Kansas City, Kansas Specialists in frequency precision SUPER-DAVOHM RESISTORS preferred and specified by ex- perts the world over, for.... | | laboratory standard high voltage regulators vacuum tube plate resistors vacuum tube grid resistors voltmeter multipliers telephone equipment television amplifiers fading controls isolation resistances Catalogue sent on request If your dealer cannot supply you--Ww rite us THE DAVEN COMPANY 158 Summit Street, Newark, N. J. Resistor Specialists ‘‘Standards of Efficiency’”’ 5 to 5 million ohms; guaranteed 1°) tolerance Say You Saw It in QST - It Identifies ¥ 1 and Helps QS/ 89

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from the Bureau’s station WWYV, Washington, D. C. They can be heard and utilized by stations Ma ny New Uses equipped for continuous-wave reception at for this Photo-Cell distances up to about 1000 miles from Wash- ington. The transmissions are by continuous-wave radio telegraphy. A complete frequency trans- mission includes a ‘‘general call,’’ “standard frequency signal,’’ and “announcements.” The general call is given at the beginning of each 12-minute period and continues for about 2 min- utes. This includes a statement of the frequency. The standard frequency signal is a series of very long dashes with the call letter (WWV) inter- vening; this signal continues for about 4 minutes. The announcements follow on the same fre- quency as the “standard frequency signal’’ just transmitted, and contain a statement of the frequency. An announcement of the next fre- efficient in action. It means im- quency to be transmitted is then given. There is ed operation of every photo- then a 4-minute interval while the transmitting ‘device. Why not be among the set is adjusted for the next frequency. to experiment with this improved Information on how to receive and utilize the » cell? Send today for Bulletin signals is given in Bureau of Standards Letter id get started in the fascinating Circular No. 280, which may be obtained by apply- f photo-electric research. Photo- ing to the Bureau of Standards, Washington, ie Division, Arcturus Radio Tube oe : y. Newark. New Jersey. D. C. Even though only a few frequencies are ; received (or even only a single one), persons can IR Cc T U IR obtain as complete a frequency meter calibration C as desired by the method of generator harmonics, PHOTOLYTIC L | information on which is given in the Letter is a new type of photo-electric . advanced in principle... The Gisstete lige Cup Geeny Gasaag Circular. The schedule of standard frequency [AKERS OF ARCTURUS BLUE TUBES signals is as follows: Eastern Standar: Time 10:00 1600 4000 550 1600 4000 10:12 1800 4400 600 1800 4400 10:24 2000 4800 700 2000 1800 10:36 2400 5200 S00 2400 5200 10:48 2800 5800 1000 2800 5800 11:00 3200 6400 1200 3200 6400 11:12 3600 7000 1400 3600 7000 11:24 4000 7600 1500 41000 7600 Se Strays “i L. R. E. Convention The Fifth Annual Convention of the Institute of Radio Engineers will be held in Toronto, Canada, August 18th to 21st, with headquarters at the King Edward Hotel. This meeting will also be known as the First International Convention of the society. A well-balanced program has been arranged, including technical sessions, exhibits, a golf RIEMA, tnc. \ tournament, tours to various radio manufac- gipesaschegp ar ong . turing-plants as well as points of interest in the a ° vicinity, and other features. ils teil Information regarding the Convention may be obtained from the Institute headquarters, 33 W. 39th Street, New York City. ically export ble receiving emitting radio —= ee @ The world at its worst — when your beginner side-kick borrows your calibrated monitor and then takes it apart to trace its wiring! — W2BFC Say You Saw It in QST — It Identifies You and Helps QST