QST 1930-01: Vol 14 Iss 1

Page 1

ee 2 | —* DEvorED ENTIRELY TO es eee . AN N= m) unr WIOF AS a we hy ase NEW YEAR AMATEURS on RYWHERE (0% from poe The A.R.R.L. H.Q. gape" gr | , e +. 4 4 ig \ aS

Page 2

David Grimes, John Geloso and Robt. S. Kruse have suc- essfully solved the engineer- ing problems inherent in A.C. Short- Wave reception. By developing the Pilotron 227 ube for use as detector, great KIT K-115 (A.C. Operated) larity and signal strength is abd 4 Ae »btained. Both A.C, and Bat- . ry-operated models employ er ath esamumenhens he sereen grid tube. Range — : ™ L to 500 meters. Kir K-110 $9Q° (Battery operated) ma ’ y The Radio International Guild and its official organ, “Radio % OU Design™ are of particular interest to progressive experimenters + 1439 and constructors. Membership 50e | per year, which includes BELONG € four quarterly issues “Radio Design,” jammed with latest data (written by practical radio engineers), and advisory engineer- ing consulting service. Return Coupon Now. tADIO INTERNATIONAL GUILD, 103 Broadway, Brooklyn, N. Y. lease find 50e kindly enroll a requiar member Name 7 ms International (Please write or print plainly) thich includes rrterly issues of Design, member- certificate and ation card, ‘ity ...State “PILOT RADIO & TUBE CORP WORLD’S LARGEST 323 BERRY STREET RADIO PARTS PLANT BROOKLYN, N. Y. (Established 1908) U. S. A. Prices quoted are Get Latest Catalog from for Custom Set-Builders nearest Authorized Dealer in U.S. A. SRADE MARK or Direct from Factory.

Page 3

Jhe Official Organ of the AR-R-L JANUARY, 1930 NUMBER 1 VOLUME XIV Editorials ‘ . WWY Standard Frequency Transmissions The A.C. High-Frequency Receiver Trophies and Certificates for the January and February Tests Beverly Dudley F. E. Handy GS5BY Wins 1929 Station Description Contest Cup i a Navy Day — 1929 ; E. L. Battey Hunting Trouble on 28 Megacycles Alphy L. Blais A Micro-Condenser for Amateur Band Tuners A. L. M. Dingee A Power Transformer for the Lean Purse E. H. Harrington, Jr. **20-Meter" "Phone Authorized Hams Are Born — Not Made Quartz Crystal Facts Matching the Speaker to the Output Tube Accurate Wire-Wound Resistors : Passing the Government Examinations for Operator’s License — Part I Beverly Dudley > o- - ee J. Herbert Hollister He M. Thomson Technical Information Service Rules A.R.R.L. Election Results Plate Supply Filters and Keying Official Frequency System W9BAG ; Experimenters’ Section I.A.R.U. News Calls Heard Correspondence Department Book Reviews Silent Keys ‘i * Hamads and QRA's Index of Advertisers . me — 08S QST 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 Beverly Dudley Clark C. Rodimon issistant Technical Editor issistant Editor James J. Lamb Technical Editor G. Donald Meserve David H. Houghton Circulation Manager idvertising Manager Advertising Offices. 55 West 42d Street, New York City Editorial Offices 1711 Park Street. Hartford Subscription rate in I nited 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 | nion, $3.00 per year, postpaid. Remittances should be by international postal or express money order or bank draft negotiable in the U. S. 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 March 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 1929 by the American Radio Relay League, Inc. Title registered at United States Patent Office Member of the Radio Magazine Publishers’ Association.

Page 4

The American Radio Relay League The American Radio Relay League, Inc., is a non-commercial association lio amateurs, bonded for the promotion of interest in amateur radio com- tion and experimentation, for the relaying of messages by radio, for the cement of the radio art and of the public welfare, for the representation of lio amateur in legislative matters, and for the maintenance of fraternal- da high standard of conduct. is an incorporated association without capital stock, chartered under ws of Connecticut. Its affairs are governed by a Board of Directors, | every two years by the general membership. The officers are elected or nted by the Directors. The League is non-commercial and no one com- ially engaged in the manufacture, sale or rental of radio apparatus is to membership on its board. Of, by and for the amateur,” it numbers within its ranks practically worth-while amateur in the world and has a history of glorious achieve- t as the standard-bearer in amateur affairs. t Inquiries regarding membership are solicited. A bona fide interest in eur radio is the only essential qualification; ownership of a transmitting and knowledge of the code are not prerequisite. Correspondence should idressed to the Secretary. DIRECTORS Dakota Division Pacific Division 2CY MAXIM Cy. L. BARKER ALLEN H. BABCOCK r 2102, Henning, Minn 65 Market St., i, Conn Southern Pacific Co., Delta Division San Francisco M. M. HILI = P.O. Box 274 Roanoke Division ssdent H. STEWART id i» Natchitoches, La Hudson Division LAFAYETTE WALSH W PTREDWAY GRAVELY Box 245, Danville, Va A. - 220 West 42d St., neral Manager e ro \ REID . New York Cit Rocky Mountain Division n Ave PAUL M. SEGAI t. P.O Midwest Division Box 1771, L. R. HUBER Denver, Cok 718 N. Gilbert St., : lowa City, lowa eeVeseOn — Southeastern Division te ODRI FF New England Division HARRY F. DOBBS aah FREDERICK BEST 245 Spring St., N. W » Pa 13 East Crescent St., Atlanta, Ga Augusta, Main n Northwestern Division West Gulf Division DARR K. W. WEINGARTEN FRANK M. CORLETT i nd Park 3219 No. 24th St., 2515 Catherine St., Micl Tacoma, Wash Dallas, Tex OFFICERS hike HirkAM Percy Maxim, Hartford, Conn. lent CHARLEs H. SteEWart, St. David's, Pa. KENNETH B. WARNER, Hartford, Conn. ARTHUR A. HeBeErt, Hartford, Conn. itions Manager F. Epwarp Hanpy, Hartford, Conn. ORRESPONDENCI ro THE EXECUTIVI HARTFORD, CONN. HEADQUARTERS AT tite do: int for see sib fou pre al kir the fro an tie: do on ani Sta Ire vol on! Sta col wil fre the Cas toc *W nt ate col

Page 5

EDITORIALS GLORIOUS international opportunity comes with the opening of a portion of our 14,000-kilocycle band to telephony, as is reported in detail elsewhere in our pages. We have here the opportunity to attempt by voice the numerous communication feats which we have done by the key. Who will be the first to talk by voice with these far-off places? Communication with them by telegraphy has become a common- place, perhaps on occasion too much of a com- monplace, but here is a chance that fires the imagination and challenges the best technical practice of which we are capable. We do these things with utter ease by code but it will be quite a different sort of job to duplicate them by phone. When we succeed we shall have done a real piece of radio engineering. These difficulties but whet the amateur appe- tite, however, and instill the desire to be up and doing. So we're off, fellows, on a new branch of the international amateur game, and not one of us can foresee the results. New technical achievements seem a reasonable supposition, but it is also pos- sible that this new use of voice will make a pro- found addition to the “‘intangibles’’ which are so prominent in any summation of the contributions amateur radio has made to the history of man- kind. Lf world-wide, amateur telephony becomes a commonplace, how much may we not quicken those ties of international friendship which come from amateur contacts! How much more vivid and real they may be! The way to these glories is beset with difficul- ties. ‘Technically this is particularly true. It is doubtful that anything other than crystal-control on the transmitter will give sufficient stability from ‘“‘wobbulating”’ to put under- stancable the on frequencies. Or that anything less sensitive than and freed speech across oceans these & superhccerodyne will suffice to receive these voice signals satisfactorily. Unfortunately teleph- ony always has been expensive. A good ‘phone station has cost about three times as much as the comparable telegraph This difference will be emphasized, we believe, with the high- frequency ‘phone work. So we must realize from the start that transocean telephony will be neither easy nor cheap. There may be other difficulties, too. Whereas every foreign amateur can read ‘QST English” and in the gradual building up of nternational contact has absorbed the abbrevi- ated American words that make up the usual DX contact, it is likely to be quite a different story when we rely upon the spoken word to convey our station. intelligence. Even with good strong signals and no static and no distortion, many a contact may fail before the language barrier which our abbrevia- tions so nimbly leap in the use of code. Even when we talk to our cousins in the far-flung lands of the British Empire we cannot be too sure that our harsh American accent will convey much intelligence the carefully attuned British tympanum. We may need a new international abbreviation to mean, ‘‘I hear you perfectly, but | haven't the slightest idea what you are talking about.” But the more credit to us if we succeed in the face of these difficulties. This is chiefly an oppor- tunity for the already-skilled ‘phone men. They have said for long that voice made for more humanness in QSO’s, for the building of more tangible friendships. ''wenty-meter ’phone offers its challenge chiefly to them. Let them now show the rest of the amateur world what they can do. And let QST make a plea for caution and mu- tual consideration as we enter this new work. This 14,000-kilocycle band is our narrowest and, in terms of commercial jealousy, our most valu- able one. There will be trouble if we get outside our band and smear up the high-priced DX traffic of some hot-dog commercial circuit to far places. Transmitters must be accurately located within the band. The monitor is vitally important in this work. In terms of the channel separation used by the Federal Radio Commission, the ‘phone space opened to us is capable of accommo- dating only six amateur ‘phone stations operating simultaneously, wherever they be located in the world. We know that the standards of amateur to contact will let many more stations than that | work satisfactorily, but the band is indisputably very narrow and there will be interference. Mu- tual forbearance will be necessary. Let each man remember not to hog it all, to give the other fellow a chance. We wish particularly to voice the pray- erful hope that each operator will take it upon himself to monitor his transmissions constantly, keep his audio quality good, and, most important of all, know that he is modulating a steady carrier and not ‘‘wobbulating”’ it all over the place. Let just two or three evil stations do that and the band will not be fit for human habitation, either for telephony or telegraphy, either for these operators themselves or anyone else. Really a risky business, this fourteen-megacyle ‘phone, because the unaccomplished or inconsiderate operator has so great a chance of spoiling things for everybody else. Codperation will be necessary

Page 6

VV Standard Frequency Transmissions f Standards announces a new radio signals of standard fre- use by the public in calibrat- tandards and transmitting and tus. The signals are transmitted station WWYV, Washington, heard and utilized by stations yntinuous- ssions are wave by continuous-wave reception at yut LOOO miles from Washing- \ complete frequency trans- a ‘‘general call, and ‘‘announcements.”’ ‘standard The at the beginning of each 12- | continues for about 2 minutes tatement of the frequency. The signal is a series of very long eall letter (WWYV) intervening; ues for about + minutes. The llow on the same frequency at requency signal ”’ just trans- a statement of the frequency of the next frequency to be is then a 4- hile the transmitting set is xt frequency how to receive and utilize the Bureau of Standards Letter which may be obtained by ireau of Standards, Washing- igh only a few frequencies are given There nly a single one), persons can frequency meter calibration vhich is given in edule of standard frequency sig- L600 1SOU 2000 2400 2800 3200 3000 1000 the 1000 $400 1800 5200 5800 O100 7000 7600 thod of generator harmonics, Letter 550 600 700 SOO 1000 1200 1400 1500 OST er amateur band. QST' strongly st at this opening stage of the should engage in the new work ng erystal control, partly to in- frequency but more particularly that the operator’s voice is modulating the output instead of wobbulating it to the generation of unintelligible phuts and fizzes on every twenty-meter receiver in the world! GA and GL! S@- Strays “es The following is the list of calls used at Mass. Inst. of Technology as it now stands: Address WIiX\ Round Hill I:xper Round Hill, Mass mental WIAX\ Round Hill Amateur WIXAN_ Round Hill — Portable WIXM Mass. Inst. of Teel M. I. T., Cam Experimental bridge, Mas WIBXM Mass. Inst. of Te m & 2 ee (Amateur bridge, Mass WIMX M. I. T. Radio Societ M. I. T., Cam Amateur bridge, Mass, WIBMX First Corps Area Net M. I. T., Cam (Amateur) operated by bricge, Mass M. I. T. Radio Society The experimental stations are required to use spt cific frequencies. They are as follows: AC WiXAN WixV WIiXM 1604 X X 1600S X 2302 X 2398 X X 3076 X 3256 X X 1108 X 1705 X X 5510 X 6155 X 6125 \ SO50 \ 12,850 xX 17,300 xX DisrorRTION RULE OBTAINABLE A power tube distortion rule with 5 per cent distortion scale has been made up for the Westing- house Lamp Co., Bloomfield, N. J., by Keuffel and Esser. The design and uses of this rule were given in the article “The Use of the Distortion Rule in Power Output Calculation,” QST, Nov., 1929. The rules available are limited in quantity at present and are obtainable from the Westinghouse Lamp Co., at cost, which we understand is about $1.50. One of these rules can save a lot of time and tedious work for anyone frequently called upon to make com- putations on the output characteristics of power tubes and modulators JANUARY, 1930 Je re: pr gr wl of sli wl th be an tel ad 8C) to hu m: an tu wl co oO} al gr re re re tic rll at se

Page 7

1930 ing it and | the Lass. JANUARY, 1930 OST The A.C. High-Frequency Receiver By Beverly Dudley, Assistant Technical Editor } 10-volt, GO-cycle power mains ‘phone or c.w. reception. The hum resulting is th receptio The constructional details for a receiver rege rative elector, and an indirectly heated triode audio has not been possible, until recently, to operate high regenerative re- ceivers satisfactorily from the 110-volt, 60-cycle power line. There are several good reasons for this. Autodyne receivers are used principally for high frequency reception of tele- graph and ‘phone signals and a vacuum tube which is oscillating, or is adjusted for conditions of critical regeneration, is extremely sensitive to slight voltage variations regardless of Irequency In building the a.c. receiver, the tube line-up was considered first. The 224 tube gives good gain at high frequencies because of its low grid- plate capacity, high amplification factor, and high mutual conductance. Its plate resistance is such that a tuned radio frequency circuit may be inserted in its output with the assurance that a reasonably good match can be obtained be- tween the plate resistance and the external whether these variations originate in the antenna or in the power supply. The principle source of trouble has been, of course, the signal modulation and hum resulting from the use of al- ternating current on the filaments. The | advent of the indirectly heated cathode | type tubes, particularly the heater type | screen-grid tube, has largely contributed | toward the elimination of undesirable hum and signal modulation and has made the a.c. high-frequency receiver an actuality. A.c. operated receivers could have ° 4 7] | tee abies aa | | | —_ = x e Pe ” hell 4\ B \ fg r\ K . a” " “ " ‘A been built as soon as the 227 type of tube was commercially available, and 1 while the filament battery could have been eliminated in such re- ceivers, the V would have had little or no advantage over similar sets using 201-A There little advantage in operate high frequency autodyne receivers from alternating current until indirectly heated screen- grid tubes came along While the entire elimination of hum is not a requisite for the successful operation of a.c it is essential that the residual hum be reduced to a point where it is greatly below the level of the signal and that it cause no modula- tion or distortion of the received signal storage tubes Was attempting to receivers, EXPERIMENTS WITH A. HIGH-FREQUENCY KECEIVERS In an effort to determine just how satisfacto- rily a.c. operated receivers would prove to be at frequencies above 3000 ke., an experimental set-up was constructed. The bread-board type of lay-out was used to facilitate quick changes. THE FRONT OF THE RECEIVER PRESENTS A IPPEARANCE PLEASING impedance of the tuned circuit. This makes the tube well adapted to impedance-coupled radio frequency amplifiers. The use of the 224 tube as a regenerative detector provides a high gain detector circuit, as has already been mentioned in the I:xperimenters Section,! and permits the effective use of a tuned coil in its plate circuit for obtaining the selectivity resulting from peaked audio amplification. This arrangement provides peaked audio amplification with one less stage than is required when using a low z, low impedance detector tube. If peaked audio amplification is not required, a resistance may be inserted in the plate circuit of the screen grid detector in place of the tuned circuit. Regenera- tion control by resistance variation of the screen grid voltage provides a method of unusually t Experimenters’ Section, page 30, QS7, October, 1929.

Page 8

T Se EPEET, , 5) IN oscillation and regeneration. chosen for use in the audio it is the best tube available idio amplification using a.c. its characteristics are such that v-224 ryyyy +s 7.5¥ SOV 6o~ CIT OF THE FIRST EXPERIMENTAL 1\D-BOARD RECEIVER th a headset without the use r coupling devices. ircuit which was used in the ceiver. ‘The heaters of the nected in series and are left iry work on this receiver lament supply and it was gh the rated heater voltage vhen operated in series was er operated exce edingly well vattery. The d.c. operated excellent high frequency free from the microphonic o troublesome in receivers W hen the receiver was operat- he d.c. heater supply was ipply f connecting the heaters to it it was found that even ting the set was surprisingly m hum. ‘The wiring was the heaters in parallel and tion was observed. A slight when the cathodes were is true, but the hum was ble. It did not modulate OST

JANUARY, 1930 signals, and one could operate the set for hours without being annoyed by the slight residual hum which was present. The results obtained with an exceedingly “hay wire’ accumulation of apparatus were so en- couraging that a second stage of audio frequency amplification was added to the receiver. The wiring diagram of the receiver with the additional stage of audio amplification and with cathodes in parallel is shown in Fig. 2. Both the signal strength and the hum audibility were increased by the second stage of amplification, but the hum to signal in- tensity ratio was not increased; if any- thing, the ratio was slightly less when the second audio amplifier was added. Several weeks were spent in playing around with the bread-board receiver and in learning its idiosyncrasies. There was certainly nothing pretentious about its appearance. The bread-board receiver was not a piece of equipment which we f Li. could view with pride but it was impor- tant because of the facts it brought out. WHAT WE LEARNED FROM THE EXPERIMENTAL MODEL The satisfactory operation of the ex- perimental receiver showed that not only is the operation of high frequency regenerative receivers from a.c. practi- . , eable, but also is successful and desir- ithodes able as well. While the hum may not be entirely eliminated, it can be reduced to such an extent that it does not interfere with even the weakest signal that can be copied. Moreover, the operator can only detect the pres- ence of hum by turning off the a.c. heater power supply and by listening for it with a headset while the cathodes cool. To one not familiar with the receiver no more hum is noticeable than that heard on any d.c. receiver operated in the vicinity of an electric light circuit. The hum due to the use of alternating current for the heaters is insignificant compared to that resulting from the use of a mediocre or even a fairly good “B”’ battery substitute provided, of course, that the receiver is properly constructed. For this reason an unusually good ‘‘B” battery substitute with an adequate filter is advised if best results are to be obtained from a set com- pletely operated from the 60-cycle line. ° Another thing learned from working with the experimental model was that the heaters could be operated either in series or in parallel as long as the tubes have the same heater voltage and current rating. The indirectly heated cathode type of tube is not critical with respect to the heater voltage or current ratings. This is a de- cided convenience, for a three-tube receiver can be operated from a 7.5-volt filament transformer,

or ar pa vo ba re: dre 2.5 / tall the for cov hur sig No fre« am. the the abo coil fre< cles ene: cat] reti did circ

Page 9

130 urs lual hay en- iio to the ol des the lit y of in- hy- hen 1. ing ver ere put ver we OT- ut. id JANUARY, 1930 OST 11 or a 6- or $-volt storage battery if the heaters are connected in series. If they are connected in parallel the tubes may be operated from a 2.5- volt transformer secondary, a 2-volt storage battery, or a 4-volt storage battery, provided a resistor is connected in the cathode circuit to was further reduced by grounding one side of the heater wiring. Grounding one side of the heater wiring through a resistor of between 0.1 megohm and 0.5 megohm was found to be more effective in hum elimination than grounding the heater circuit through a low resistance path, 1 7OP VIEW OF THE RECEIVER drop the terminal voltage to not more than 2.5 volts. In the experimental receiver we have been talking about (and later in the final receiver the slight residual hum was found to be constant for any or all of the various amateur bands covered by the receiver. Apprehension that the hum audibility might increase directly as the signal frequency was found to be unwarranted. No residual hum peaks were discovered at any frequency, and the operation in the 14,000-ke. amateur band was as successful as operation in the 1750-ke. band. It was impossible to make the detector oscillate at frequencies greater than about 20,000 ke. and it is for this reason that no coil winding data are given for amateur bands of frequencies higher than 14 me. FURTHER ELIMINATION OF HUM with the experimental receiver that little trouble should be kx I verience clearly indicated encountered in the elimination of hum from the cathode circuits. Connecting the detector grid return and the cathodes of the tubes to ground did more than anything else to reduce heater circuit hum. With series connections of the heaters the hum WITH THRE SHIELDS REMOVED but best operation was obtained when the heater wiring was ground through a l-ufd. condenser. When operating the heaters in parallel, the cathodes should be connected to a mid-point of the transformer secondary winding, or to the variable arm of a voltage divider of approximately 50 ohms connected across the heater. Operating without d.c. bias between the heater and the cathode is the normal minimum hum and is to be preferred. In some broadcast receivers it has been found that biasing the heater approxi- mately nine volts negative with respect to the cathode may be helpful in reducing the hum but this practice has not been found beneficial in the receiver described in this article although bias between the heater and cathode may be useful in some high frequency receivers. The use of shielded or twisted heater wiring for the pur- pose of hum reduction was found unnecessary, although these precautions might be of use in some individual receivers. connected to resistance one for TESTS WITH A.C. TUBES Up to the time of writing all tests have been made with Radiotron, Cunningham and De- Forest type -24 and -27 tubes because these were

Page 10

le. A sufficient number of these d so that results given in the graphs may be taken as repre- ubes used was found to be critical ter voltage or current. In general, successful operation could be 1.7 volts across the and satisfactory results have by operating the heaters at 1.5 ] it is recommended that the d between 2.0 volts and 2.5 little as 600885) *8 22¥ *B 90V. +8 I80v 1NOTHER ARRANGEMENT OST USING JANUARY, 1930 to select the tubes most free from hum where tube selection is possible), all of the tubes which have been used so far have been found suff- ciently free from hum to be satisfactory in operation. The fact that indirectly heated tubes require a long time to become thoroughly heated, makes it difficult to compare them in a receiver by aural methods. CONSTRUCTION OF THE FINAL RECEIVER The circuit of the final model shown in the photographs is given in Fig. 3. This receiver has ~C4hv 25¥ AC TWO AUDIO STAGES WITH THE FILAMENTS OF ALL TUBES IN PARALLEL frequer ‘ t - cy amplifying trar ting letters as in Fig. 1. t vy the manufacturer. The tubes uickly and operate sooner after is turned on when the heater is rated voltage than when operated All of the tubes used so far rf mately half a minute of heating be heard, but as a general 1 not reach normal emission inutes after the heater current Signal audibility increased from t] tector tube oscillated and brought iT nal until the tubes were heated ly two minutes, after which no use was observed. lividual tubes were freer from ers (which makes it desirabk ( . ‘ f Tur I I ft 60 1S 1100 1 10 7450 14 7 +500 f indicated Unless otherwise eformer 1 all coils are 1ll the other pieces of apparatus use the several advantages beside that it may be en- tirely operated by batteries, a transformer and “B” battery substitute, or a combination of these. The semi-tuned input circuit of the radio frequency amplifier allows adjustment of the antenna coupling coil for maximum signal strength and minimum interference from broad- cast signals without the necessity of tuning the input circuit. Shielding is used, both as an aid to selectivity and for the realization of maxi- mum gain from the radio frequency amplifier and detector circuits. The set is quiet in opera- tion, for the tubes are free from microphonic effects. The detector tuning is independent of the antenna circuit constants because of the use of the shielded coupling radio frequency ampli- For os — r choke coil for antenna circuit for reception in 1750-ke. band Both tuning condensers used Both tuning condensers used. Turns are space wound The Small tuning condenser used 75” Small tuning condenser used “close wound.”’ UY and on liar prin nt Das¢ freq tab] lo t rece caps wiri tube are it is will U inp tenr oper coil inte Exe freq circ

Page 11

L930 ‘here hich suffi- vy in ubes ated, elver the * has en- and 1 of audio the mal yad- the aid axi- ifier era- nie ol use pli- pace JANUARY, 1930 fier. Operating controls have been reduced to ¢ minimum, and the receiver is entirely free from body capacitance effects. The symmetrical ar- rangement of apparatus used is a logical one, for the mechanical layout follows closely the arrangement of equipment in the sche- OST 13 tector circuit is used in the input. This arrange- ment is flexible and requires only one more coil than is actually needed for tuning the detector circuit to the several frequency bands. In general, the coil most suitable for the antenna or input matic wiring diagram. ‘These points are always advantageous, not only from the standpoint of appearance but also from those of common sense and simplicity of assembly. There is little of the strange or un- usual about the receiver. In wiring the set, No. 14 solid insulated wire is used in the radio frequency and audio fre- juency portions of the circuit because f its strength and rigidity. The d.c. attery leads are made of bell wire and we cabled and laced following the tandard telephone practice. A battery ‘able with plug and jack is used for making the connections between the receiver and the plate battery or “B”’ substitute; other connections to the re- iver are made to binding posts. All of the wiring, with the exception of the Me. tae Lids Sed sess eS ad —— filament or heater wiring and the grid bias connection to the radio frequency amplifier, is above the baseboard and all of the component parts used in the con- struction of the receiver are ‘“‘above board.”’ Care must be exercised in insulating the wiring at points where it goes through the shields since the shields may cut through the insulation unless it is quite heavy. The 14,000- and 7000-ke. coils are wound on UY tube bases which are 1%¢ inches in diameter, and the 3500-ke. and 1750-ke. coils are wound on commercial tube base forms, 114 inches in liameter. A radio frequency choke coil, used principally as an antenna choke coil for reception m the 1750-ke. band, is mounted inside a tube The details of the coils for the various frequency bands are given in the accompanying lable which will serve as an approximate guide to the construction of suitable coils for similar receivers. Because the stray and distributed tapacitance and inductance of the coils and wiring, the inter-electrode capacitance of the tube, and even the voltages at which the tubes are operating effect the frequency of the circuit, it is impossible to give coil specifications which will hold true in all cases. Unlike the usual practice in most untuned input circuits, an interchangeable plug-in an- tenna coupling coil is used. This permits the operator to choose the best antenna coupling coil for any frequency band, and reduces the interference from local broadcast stations. Except for 1750-ke. reception, where the radio irequency choke coil is used in the antenna THE DASC circuit, one of the spare plug-in coils for the de- CONSTRUCTION OF PLIFIER AND DETECTOR UNITSIS SHOWN MORE CLEARLY THE RADIO FREQUENCY AM- IN THIS PHOTO circuit is the size larger than that used in the detector circuit. Thus, for reception in the 7000-ke. band, the 3500-ke. coil is used in the antenna or input circuit. The tuning condenser is made in two separate sections. One section consists of two plates, double spaced, having approximately 10 yyfd. capacitance, and is always connected in the circuit. The other section consists of five plates, double spaced, having approximately 40 yyufd. capacitance. The second section may be put in the circuit by connecting the coil form prongs marked C and G together. The connection of the prongs in the coil forms for using the smaller condenser is shown in Fig. 4A while the connec- tion for using both sections in parallel is in- dicated in Fig. 4B. It will be noticed that a grid bias battery is incorporated in the receiver. This is done to minimize the possibility of hum pick-up in the grid bias connections and because commercial “B” battery substitutes are seldom provided with binding posts giving the desired grid bias voltage. Moreover, the battery is small and, since there is no current drain upon it, there is no reason why the battery cannot be incorporated within the receiver. The radio frequency amplifier is given a bias of 1.5 volts, while the audio amplifier has : 1.5-volt bias. No bias, other than that obtained from the grid leak, is applied to the detector tube. Grid leak bias is used on the detector tube be- cause grid leak detection is more suitable than ~

Page 12

0 signals of low level. Only one requency amplification is used tector tube so there is no rea- inode-bend rectification. echanical layout of the apparatu nducta nce lenna coupling See te g inductance. See the table for eration coil. See the table for detail -ohm regeneration control resistor hm plate coupling resistor nt switch f io frequency choke coil ludio frequency coupler. Satisfactory tance of a satisfactory unit are, respe l 30 he C — 0.01 pfd 100 ohms. rys ION OF THE RECEIVER from the front view of the re erating controls have been re- im. The knob at the left con- 2 CONNECTIONS FOR 3500-Ke BANDS ANDO '750 Kc BANOS FIG.4 8 n, the control at the right is the , and the center knob and dial ng of the detector circuit. Opera- iver inserting the reuit and input coils, applying consists of ST JANUARY, 1930 heater and plate voltage, and (when the tubes are thoroughly heated) making the necessary tuning and regeneration adjustments. Operation is ex- tremely simple. I gn rte et err tee 7 ' ‘ ' ' ' L ? H tT _ a a r T 4 = » Phones i queniiind ' T ‘ ' i ' i ' = ' ' i ! ' ' T ' ‘ ' ' ' ' : ' ; ' . ' beeee eco cons &Sdocecboodecedocafbocceoo occend B- G+22v Br Sov B+ gov 7Sv AC FIG. 3.— THE CIRCUIT OF THE FINAL RECEIVER ts not shown in Fig. 1 or Fig ere or porated the nal model. A parison he- sagram and the photograph ll show the milarity betwe he her J ram The oscillation control is unusually smooth, provided a satisfactory resistance unit is em- ployed to vary the screen grid voltage, and has little effect on tuning. The l-ufd. condenser shunted across the regeneration control reduces any noise which might be caused by variation of the resistor. The regeneration control may be still further improved by shunting it with a resistor of several megohms so that the total resistance variation is smaller than if the fixed shunt re- sistor were not employed. Of course the total resistance of the two parallel resistors is less than the resistance of either one of them, so that the screen grid voltage is greater, and this may in- fluence the number of turns used on the tickler coils. The fixed shunt resistor must be of high See Resistance Control of Regeneration,” QST, Aug. 1929. (Continued on page 78) tit in 0; bo fe’ full ope opp and mar is it day

Page 13

L930 *S are ining S exX- yoth, em- | has “nser luces yn of still or of ance t re total than ; the y in- *kler high —= QsT, JANUARY, 1930 OST 15 Trophies and Certificates for the January and February Contests By F. E. Handy, A.R.R.L. Communications Manager LL information necessary for participation in our All-Section Sweepstakes Contest (January 18th to 3lst inclusive) or in the Third International Relay Compe- tition (February 15th to 28th inclusive) was given in December QST under the subject of Coming Operating Activities The prompt and enthusiastic response which followed announcement of our 1930 competitions bodes well for the success of both events. Just a few weeks more and contest number one will be in — — M, | 3 ~ ’ . & ny % * ~ . , “sw Ve ¢ * ae = ~ " x ~ e 5 S . _ = as y S x Se | a. y % THE SWEEPSTAKES TROPHIES T} wel prize | be presented to the three highest pstakes ( test ir hat- > Ss v7 full swing. There will be two weeks to cram full of operating enjoyment, two weeks of unparalleled opportunities. How many stations can be worked and messages exchanged in the given time? How many Sections of our A.R.R.L. field organization is it possible to contact in this fashion in fourteen days’? And what scores!! Then almost before we realize it, the February world wide tests will be here. We strongly wish that this magazine for once might be printed in colors to do justice to the blue and brown handsomely lithographed certifi- cates which will be presented to the winners in each country and section in our International and All-Section tests! The black-and-white reproduc- tions which appear herewith will give you a little idea of how these attractive 8144” by 11” testi- monials of success will look. They really can’t do the subject justice, though perhaps participants can use imagination While we were enthusiastic about the spon- taneous interest in both contests, the unusual DX possibilities of the February competition, and the big records, new contacts and friendly spirit sure Pg) Cie American Radio Relay League, Inc MICATIONS DEPARTMENT Wartior®, Com. & &. &. CERTIFICATE OF PERFORMANCE ALAN PREPET ASD CONTEST bee PRO Toes ws to certelp ne Ame Ratio Seren es ee doy reined es Swenpeahes Award 1 a A mn G NG Menage wah woe wets oy he core mans (mw porns ee ad Pee es aor erated © des "Ragin as tt ed Seatson of the ONE OF THESE BROWN HANDSOMELY LITHO- GRAPHED CERTIFICATES WILL BE AWARDED TO THE VICTORIOUS STATION IN EACH A.R.R.L. SECTION IN OUR ALL-SECTION SWEEPSTAKES CONTEST to be developed in the January tests, the idea struck us that to do the January tests justice we ought to present the three highest scoring stations in the whole field organization some special trophies or prizes as symbols of victory in addi- tion to the certificates they might win History gives us some interesting information concerning various symbols of victory. A Dutch commander, Admiral Tromp, defeated the British fleet under Admiral Blake at Dover, England, in 1652. Complying with the custom of the times, the Dutch commander sailed up the English Channel with a broom hoisted at the masthead of his flagship, denoting that he had successfully “swept the seas.”’ Prizes in any contest may be

Page 14

takes.’’ Webster informs us that ngs ‘‘sweepstakes”’ signifies ‘‘a » highest scoring stations in our virtue of skillful operating by virtue of having literally piling up points by a large num- QSOs with individual stations urprisingly large number of 4 The American Radio Relay League, Ine. $ Doertford. Conn. U @ A RTMPICATE OF MERIT MOET Nees oes i - Ras KS ARUP AR Ae ee BNA /-\ ta. fa, POP TIFICATE OF MERIT TO BE LEADING STATION SCORING ER OF POINTS IN EACH AND tVADIAN SECTION IN THRE iL RELAY COMPETITION f these blue lithographed yet in on the fun of partici- erhaps taking a crack at a try card ne before it is too late. December QST contest has been officially tion Sweepstakes Contest, the ns, symbolic of victory, ap- on each of the award certifi- trophies themselves. A sweep- thead of our radio stations te even if a bit clumsy, but the advent of high frequency | the obsolescence of rotary igh multi-wire antennas, we icuous masts. For this reason ippropriate to design some rophies suitable for display in significant of victory, em- \.R.R.L. emblem, and ap- eet long has been selected as a ies. The League colors, black throughout in the design. Like nd Rettysnitch (the traditional teur fraternity) these sweep- ilso fashioned of radio mate- ium tube is firmly affixed to three prizes The eall signals of ng our three sweepstakes izes will be inseribed in black varnished cambric, better constructors as empire cloth. OST JANUARY, 1930 The photograph of our three special prizes, lack- ing only the call signals and scores of the winners, is shown herewith. How would you like to have oné of these sweepstakes trophies for your station? By proper application you may win one of the sixty-eight sweepstakes certificates and also one of the three sweepstakes trophies! Then in mid-February the Third International Relay Competition opens. Sixty-four ‘‘ certificates of merit’’ will be available to issue to participat- ing amateurs in the A.R.R.L. Sections in the United States and Canada. All amateurs operat- ing stations anywhere in the whole wide world are invited to take part. Just as many “certificates of merit’”’ will be issued as there are participating and reporting foreign localities as was explained in our announcement last month. In both con- tests the main competition you receive will be that of the operators in your immediate Section of our A.R.R.L. organization. Provision has been made to tabulate the Section scores too, to deter- mine for both contests which Sections have the most active organization in proportion to the distribution of licensed amateurs in the different sections. This contest will be a big opportunity to roll up new international DX records and make the WAC Club. But amateurs in the U.S. A. and Canada must remember that i is necessary to submit entries in advance of the February competi- tion to obtain the ype cial logs, serial numbers, and test messages for use in the international contest. Better read the rules of the February contest that were printed in December QS7’, and send your entry right now before it is too late to enter. The American Radio Relap League, Inc. ¢ Dartford, Conn, BH @ A cPrRtTiMm AT? OF MERIT This ts to certify ARPRACAE DC VCR TOES ; RR RRS RRR IN WHATEVER COUNTRY YOU LIVE, YOU WILL COMPETE DIRECTLY ONLY WITH OTHER AMA- TEUR STATIONS USING THE SAME INTER- NATIONAL PREFIX TO THEIR CALL SIGNAL THAT YOU USE, IN OUR FEBRUARY TESTS The attractive blue certificates that will be given to the leading station in each locality outside the U. S. A. and Canada in the Third International Relay Competit hown above. QUESTIONS AND ANSWERS There seems to be a universal understanding of our February tests, the Third International Relay Competition, possibly because this will be similar Continued on page 80) the ent rus des cor cid

Page 15

930 ack- ers, lave ion? the l¢ of mal ates pat. the rat- are S of ing ned on- be ion een ter- the the ent y to ake ind | to eli- tnd est. hat yur of Ly JANUARY, 1930 OST 17 G5BY Wins 1929 Station Description Contest Cup Other Prizes Won by W8CEO, W1WV and W8BQ HE Station Description Contest an- nounced in the March, 1929, issue of QST ended with the publication of the last station description which was in the December number. The closing date for entries was October 10th—and what a grand rush there was at the last minute! As only one description could be published in a single issue, competition between the late-comers was de- cidedly keen. As stipulated in the rules for the contest, the best description on hand was published in each issue of QST; WSARO started the contest in May and W2FL completed it in December. In the final judging of the eight descriptions pub- lished, the winners were as follows: First place, with the handsome sterling silver cup as the prize, went to GS5BY, Mr. H. L. 0’ Heffernan, of Croydon, Surrey, England. Second place, and the $25 cash prize. ... .WS8CEO Third place, with the $15 cash prize... .... W1WV Fourth place, and the $10 cash prize. . WS8BQ The Editors of QST acted as judges, and the decisions were based on the points listed on page 38 of the March, 1929, issue of QST. These, together with the rules for the contest given in the announcement, also determined the choice of the station description for each of the months of the contest. Just to refresh the memories of those who may have forgotten them, the fourteen points are again given: Ingenuity employed in design, construction and arrangement. The transmitter. The receiver. Power supply for transmitter. The antenna system. Change-over arrangement. Provisions for monitoring transmitter output for quality. Provision for knowing accurately the emitted frequency of transmitter. Provisions for working on different bands. Provisions for rapid and accurate shift of frequency within each band. The goodness of the keying system. Workmanship. Extent to which the apparatus is “home made.”’ Interest and intelligibility of the descriptive manuscript and illustrations. Each of these points was given commensurate weight and the system of judging was such that there was no possibility of foretelling who was ahead prior to the final tabulation of the points; moreover, the tabulation revealed that there is still room for a great deal of modernization in oN Pree eal tines L ———————— THE STERLING SILVER CUP WON BY G45BY The cup is engraved, ‘First Prize, QST Contest for Best Amateur Station, 1929. Won By H. L. O’ Heffernan, G5BY.” even our best amateur stations, if those entered in the contest are the criterions by which amateur stations the world over are to be judged. The purposes of the contest were to place before the amateur fraternity practical examples of the background principles brought forth by the A.R.R.L. Technical Development Program; and to revive the “Amateur Radio Stations” feature of QST with descriptions of merit. There is no doubt that these two primary aims have been accomplished. Actual applications of the Technical Development Program prin- ciples are exemplified in the station descriptions published during the last eight months of 1929. Every amateur having a station of which he is justifiably proud cannot help but appreciate the advantages accruing to himself and other fellows in the game with the publication of a description of his station in QST7'. The present season is unquestionably bringing forth better amateur stations and practices. Descriptions of such stations and details of these practices should and will be chronicled in these pages. (Continued on page 80)

Page 16

OST Navy Day—1929 By E. L. Battey, Asst. to the Communications Manager . number of years a program of Navy legraphic broadcaststo amateurs has irried out under the auspices of the League of the United States. These br ire in the nature of commendatory al tional messages from the Secretary of President of the American R League. The broadcasts are con- d form of a “receiving competition” the a moteurs ir turning in a copy of the Navy D is listed on an Honor Roll which is n those who have copied the messages P re listed in the order of the number in their copies. In past years the iving the most perfect copies re- f appreciation from the Secretary the Chief of Naval Operations Ss number of perfect and near-perfect ived in the 1929 competition vere found to be insufficient, tions were to be given full credit. Secretary of the Navy agreed to ional ten letters, making a total ‘ s made it possible for the grading col much more readily differentiate bet est copies, and place every partici- er on the Roll. ick over the past few years, we ré increasing interest being shown in \ mpetition. In 1925, with twelve st ng the broadcasts, only 40 partici- pal reports. In 1926 eight stations sent tl nd 41 amateurs reported reception I »pied the broadcasts in 1927 from se) [In 1928, to prevent the possibility of ng transmissions from different sta to insure that everybody had a cl t the messages, but two stations were cl the broadcasts; NAA and WIMK. TI that 240 copies were turned in for pal z surpassed all other years! 254 | the messages. This is the greatest nul py the Navy Day broadcasts and if the friendly relations that exist bet nited States Navy and the radio an Davy came on October 28th and in ac th the announcement in October OS ges were sent from NAA and Wl! \ transmitted on 4015, 8030 and 12 (0 p.m., E.S.T., and W1IMK on at 8:30 p.m., E.S.T. The fact t tions are located in the eastern part of the country gave the amateurs in that section an obvious advantage. This has been called to the attention of the office of the Director of Naval Communications and we understand that NPG, San Francisco, California, will take part in future competitions at a suitable time for all the partici- pants concerned. At the time of the NAA broad- cast it was only 4:30 p.m. on the West Coast and the majority of the participants were not home from their daily occupations, thereby missing the first part of the broadcast by arriving home late. The W1MK broadcast also came at a rather early hour. Ordinarily signals from the East Coast do not come through well on the West Coast at such early hours. These circumstances had to be given consideration when the copies were being checked. Western participants were given additional credits and preference over eastern participants in proportion to the appar- ent handicap involved A word as to the method of grading the copies received might be in order at this time and save the grading committee from the wrath of those amateurs who do not take a very high place on the Honor Roll. Copies were received from 254 amateurs. All except 62 of these submitted copies of both NAA and W1MK, which made a total of 446 copies to be checked. The first step was to go through these copies to check up on the number of errors made. After this, those submitting both copies were separated from those submitting but one. The first group, those having both copies, were sorted out as follows: Perfect copies came first; those with one copy perfect came next, arranged according to the number of mistakes on the imperfect copy and the distance of the partici- pant from NAA and W1MK;; those having but one error on each copy were given next place, arranged according to distance, conditions, etc.; the remaining were arranged according to the total number of errors made on both copies, participants at the greater distances and working under greater difficulties being given the higher places. The second group, those submitting but one copy, were sorted in a like manner — perfect copies first, the men at the greater distances given the preference, etc. Those in the second group follow the first group on the Honor Roll. In view of the disadvantages that western participants had, they were given additional cred- its as mentioned in the preceding paragraph, and because of this fact, stations W6AW, W7EO, W6DLI, W6BVY and W6EFA were given a place among the first twenty, even though their copies were not perfect. Taking into consideration JANUARY, 1930 JA the cor co} pal ext the per ver sta sta’ sho I whi cou enc in t by am Wil whe pru this 357. sagt cou’ 803! uals of n mor NA But fello freq the « fron Phe sect gon, mov £00¢ hum and Con exce ditio acco It w QR? trou Rece Our stati that com! mess com! flour and | his F te very stati

Page 17

L930 ction o the aval V PG, iture rtici- road- - and 10me g the late. ather Kast West inces opies were over )par- opies save ‘hose ec on | 254 opies -al of to go mber both r but pies, eame next, Ps On rtici- + but lace, etc.; . the pies, -king igher + but rfect nces cond Roll. stern ered- and 7 EO, pn a their ition JANUARY, 1930 the difficulties under which they worked, the committee decided that they had displayed a copying ability equal to some of the eastern participants turning in perfect copies. It was an extremely difficult task to decide what place on the Honor Roll the many perfect and near- perfect copies should take, and it was only after very careful thought and consideration that each station was given its place thereon. The first 100 stations listed all submitted very fine copies and should feel justly proud of their work teceiving conditions during the broadcasts, while somewhat varied, were quite favorable the country over, QRM being the principal difficulty encountered by all participants. W1 Mk, working in the amateur bands, was much more badly hit by QRM than was NAA. QRM from other amateur stations was so bad on 7150 ke. that W1MK could not in some cases be located, and when located considerable trouble was had in pruning the QRM from the edges. Discovering this fact, a number of participants changed to 3575 ke. and consequently lost part of the mes- sage in so doing. NAA suffered from QRM from a couple of commercial stations working on their 8030-ke. frequency. A number of careless individ- uals projected themselves before the scornful eyes of many participants by thinking they could work more stations by tuning their transmitters to NAA’s frequency — outside the amateur bands But they gained nothing except the curses of their fellow amateurs. 3500 ke. averaged the best frequency for copying both stations. Practically the only radio-QR M experienced on that band was from amateur phones overlapping their band. Phone interference was reported from every section of the country. W7ABH, Portland, Ore- gon, finding W1MK hard to copy on 7150 ke moved to 3575 ke., where he made a reasonably good copy of President Maxim’s message. A number of West Coast participants made perfect and near-perfect copies of NAA on 12,045 ke Conditions were reported fine on that frequency except for occasional fading. Local weather con- ditions in some sections hindered reception. QRN accompanied a snow storm in Denver, Colorado. lt was raining hard at North Platte, Nebraska QRN was bad at Baytown, Texas, and a bit troublesome in some parts of Pennsylvania Receiving conditions were fair in California Our old friend, power leak, was present at some stations during the broadcasts. Others reported that their neighborhood QRM plants promptly commenced their deviltry at the start of the included are-lights, commutator ripples from motors in cotton and four mills, power houses, electric refrigerators and oil burners. QRM didn’t bother WSGZ, but his Ford was stolen while he was copying W1MK! Reports on signals from NAA and WLMK were very well balanced. 192 participants copied both stations! Throughout the entire eastern section mhessages These street OST 19 of the country practically no difference was noted in the signals from these stations, the average report being QSA5. W7BB at Seattle, Washington, reported both stations R5-7, W1MK covered with QRM. At Jamestown, North Dako- ta, WO9BVF reported NAA QSA5 R9 and W1MK QSA5 R7-8 on 3500 ke.!! W9BDP copied both stations in the railroad station at Falmouth, Indiana. WI1MK was copied at Balboa, Canal Zone, on 7150 ke. Reception in the southwest was a bit better on NAA because of the heavy QRM on WIMK, although WIMK was copied with difficulty. In the midwest one station was as easily copied as the other, with occasional cases where WIMK suffered because of QRM. Many stations waited until the last minute to locate NAA and W1MK on their receivers and thereby missed large portions of the first part of the messages. E. W. Mayer, K4KD, however, took a very far-sighted attitude and his unusual work is well worth recounting. Mayer started making observations on both stations a week previous to the broadcasts, logging them both on their 3500- and 7000-ke. frequencies at the same time using separate receivers and split head- phones, one ’ phone on each receiver. He checked his receiver calibrations each day to make sure they were correct and that he would have no trouble in logging the stations on Navy Day. The NAA message was copied 100 © on 8030-ke., and W1MK was copied 90°; on 3575 ke. and 10% on 7150 ke. by means of the split headphones. Had it not been for the fact that K4KD had previously arranged this unique method, and had he chosen to listen on 7150 ke., he would have been able to copy only 10% of the WIMK message! The 1929 Navy Day broadcasts are printed following the Honor Roll. These are not guar- anteed to be free from errors and are not meant to be used for checking purposes. They are printed only for the information of those in- terested. The first twenty men, whose names are set aside from the rest on the Honor Roll, will receive a letter of commendation from the Secretary of the Navy, as already explained It is hoped that there will be even more inter- est in the 1930 broadcasts, and that twenty letters will be insufficient when copies are graded! THE 1929 NAVY DAY HONOR ROLL W4BG F. E. Lane, Jacksonville, Fla W9DXY P. H. Quinby, St. Louis, Mo. W2CEV J. Paseal, Columbia, Mo W9CZC B. E. McElwain, Blencoe, lowa W6AW Roland D. Richardson, Oakland, Calif W7EO Herman T. Louis, Dayton, Ore W6DLI R. J. Ogborn, San Pedro, Calif W6BVY E. J. Beall, Newman, Calif W6EFA — Joseph P. Walter, Los Angeles, Calif W9AT Don H. Mix, Madison, Wis. W9EFX Frederick Seifert, Milwaukee, Wis

Page 18

wo wo Ws NM? BJ. \( rN. PO, WIIR, tL, WSCFL, PP, WI1AJC, ML, WSDPI, ‘A. WSJH, } Mears, LaCrosse, Wis. L. Whannel, Springfield, Il. neth Stocker, Detroit, Mich. lerick Best, Augusta, Maine s F. Silver, Lynn, Mass Ef). Blackie, Roxbury, Mass rtin L. Croft, Martinsburg, Pa Wilm, Jersey City, N. J. us. J. Heiser, Auburn, N. Y. ng 234 stations on the Honor Roll sted in the order of high scores W7ABH, K4kD, W9CSR, W9BAO, W9AQG, Wesley 8S. Blanchard (Opr DE, W3BD, W2LU, WSAFG, R NMNY), W2CDM, W2BEG, RT, W1IQH, W9CE, WS8DMS, PP, WICRA, W9COS, W9UZ, WIBFT, W2AQ0S, WSVD, WIBOD, W2PF, WSBKM, W6EPZ, W6ETJ, W6EEB, W6ETC, WSRQ, WS8CEO, \, WICDX, WIIP, W9PW, l. W9GAD, WIAPK, WI1MO, K, WOFWG, WSAMB, W9ANT, WSAHP, W9DSC, WIAOT, Z, W9DLD, WSDSP, WSCZM, UG, W3MC, WIBCR, W9BVF, W9DTK, W9EGE, Alva Par- , WS38UN, WIQR, W9CFL, H, WSDYH, W1AVJ, WLASU, CUH, WSBWE, WIAMLU, Z, W5QN, W9OFBX, WSCMB, WIBST, WICOV, W9FO, WSBRO, WSBDV, W2ACD, WIPY, WIBEH, P, WSABX, WIBBT, W9DHN, W9SS, Donald E. Maxham, WICRC, WIAP, WSDUT, WI1AUC, W9AUH, WIMT, \F, W4PD, W9EHF, WSUC, \, W7BB, , WT7OV, 1H, WSHD, LL, WIBFZ, W1ADO, W2BVF, \ZA, WIBNM, W5ARE, Paul W9AAR, W9SDEB, W9CEX, D, Fred F. Russell, WIABM, 1. C. Van Horn, Wm. B. Schaum, S, WSATM, WSMV, W3APT, W4AFQ, WSAIH, E. W V, WO9CTW, W9FBE, W9EAM, K4AKV, W9DGS, W5ASQ, VG, WIKY, W90T, WIANH, W9BAZ, WIAFD, W9FD,, vrence, F. FE. Fairchild, W4VR, ley, Phil Skinner, C. Rein- Robert M. Watson, Newell D. isoe, H. B. Waddell, Alvin Mayo, S. D. Jernigan, W2AZV, OST JANUARY, 1930 W9GGB, W2ANV, WI1AVI, W9BSM, WIES, W9ABG, W1WQ, W2BJO, W1AQL, G. Mathe- son, W3CY, WSPR, W9FFD, W2BBP. THE 1929 NAVY DAY BROADCASTS From NAA: NR1 Govt. Washington, D. C., fid. 1929, CK 298. To the Radio Amateurs of the United States Yesterday was the eighth anniversary of the institution of Navy Day and the seventy-first of the birth of that great American, former President Theodore Roosevelt, to whom the Navy owes so much. Upon the observance of Navy Day today I take the greatest pleasure in sending greetings to the radio amateurs of America. This country and the United States Navy has every confidence in your continued prog- ress and places well justified reliance upon your assistance in time of war or any other emergency The amateur has reached his highest development in the United States and probably in no other country has he con- tributed so much to the progress of the radio art. You were the first to discover and demonstrate the world encircling practicability of high frequency. In the last war the Navy built up its operating personne! largely by recruits from the amateurs of the country and should a national emergency again arise I feel certain that 7:30 p.m. 28 October, we will again find you ready. Many of you are in our Volunteer Naval Communication Reserve, a branch of the service of which I am justly proud lo those who have not yet become affiliated, 1 would ex- tend a cordial invitation to join. You will find the associa- tion helpful and the Navy will gain much. By furnishing communication during devastating storms and floods, the Volunteer Reserve, by means of its communication network, has already In conclusion I wish to congratulate you upon your very great accomplishments in the past and assure you of my in- made a most enviable record terest and confidence in your future progress C. F. Apams, Secretary of the Navy. From WI1MK: QST QST QST de WIMK WIMI WIMK. To the Radio Amateurs of America, Once a year the President of the United States set side a day which is known as Navy Day. For years past it has been the practice of the A.R.R.L gram which shall pay a fitting tribute to our United States Navy. The President of the A.R.R.L. tonight takes the key of our headquarters station in an effort to help make to cooperate In a pro- this program a success. He asks every radio amateur to en- ter into the spirit of the affair and to do his part. The See- retary of the Navy will send to the ten amateurs who copy this message most perfectly a personally signed letter of appreciation and all participants headquarters copies of the two Navy Day broadcasts to amateurs will be included in the Navy Day Honor Roll which will appear in December QST Let me take this occasion to remind every one of you that the radio amateur occupies a very important and responsi- ble position in his country. If he owns and operates an efficient radio station he is doubly important. In times of public emergency he may be the one to save life and prop- This has sending erty and alleviate suffering as no one else can happened many times in the past and will happen again in the future. The Navy appreciates this and it is a mark of this appreciation that your President is invited to take an Day celebration important part every vear in Navy offers us radio Let me also remind you that the Navy amateurs a particularly attractive Volunteer Reserve en- rollment. If you are physically fit you can be a member of the U. S. Naval Reserve and sign U.S.N.R. after your name. Write in to headquarters for full information (Sig.) Hiram Percy Maxim, Lieut. Comdr. U.S.N2., President, American Radio Relay League. m¢ cal tol wh ms t.p the tal fre lat has tio tro run fres bui bat bec

Page 19

ber I of reat hom Day ss to ited rog- ance the con- were ling nnel ind that tion oud | @X- Cla- ue. oo JANUARY, 1930 OST Hunting Trouble on 28 Megacycles By Alphy L. Blais* HE 28-me. band, over a year old now, has spelled trouble for more amateurs in twelve months than any other band Poor conditions, lack of coéperation between experimenters and too little boosting and a scarcity of information, are some reasons why 28 me. has not been used extensively. Happily, there seems to be a renewal of interest and activity at this time. Let’s hope that the amateur will awaken ‘‘en to the use- fulness of this 28-me. youngster and cultivate it more heartily. There are thrills and surprises hidden right in this band; a few drawbacks and troubles one can easily master and cure. The major trouble originates in the receiver. The amateur complains that he cannot get up to 28 me. and, if he does, the performance of his receiver is so erratic as to discourage him in plugging ahead at remodeling after the tenth trial. Others cannot locate the band on the receiver. A calibrated monitor will help in this ease, as will be shown later. I venture to say that 90° of the trouble originates in the reception end of the 2S8-me problem, and if one may judge by the many masse ”’ requests for information received, the case is true for 95% of the amateurs trying out this band. Dead spots, absence of regeneration, noises and what not, are some of the troubles encountered while trying out the receiver. During the last year of experimenting on 28 me. all results, whether negative or positive, were carefully noted and analyzed afterward. The conclusions drawn helped in building a receiver which would please even the most exact listener As far as the transmitter was concerned, the main item was to get it perking on 28 mec. The t.p.t.g., Colpitts, Ultraudion, m.o.p.a. — all of them oscillated without trouble. (I’m_ not talking about the quality of the note, stability of frequency and key thumps. These were taken up later and cured one at a time after the receiver had been put to work and the transmission ques- tion had come up.) AUDIO AMPLIFIER To simplify matters and to reduce the causes of trouble, it is preferable to have an audio amplifier run independently from the detector and radio frequency stage, when the latter is used. By building a good amplifier, and operating it with batteries separate from those used on the de- * VE2AC-VI bec. Car ida 2AS. P. O. Box 221, Thetford Mines, Que- Moreover, this centers most of the trouble hunting in the tector, better results are obtained. first part of the receiver. Both transformer ll oF f / L Cc / BP: § Pie A zz. if f LU FIG. 1.— WINDING TERMINAL ARRANGEMENT ON THE TUBE-BASE inals connect to “‘A”’ ls to “*C”’ and ithor by Mr. C. V. and “ B,’’ grid coil termi- ‘D.”” The arrangement was suggested to the Smith, Jr., of Thetford Mines, Que. Tickler tern coupled amplification and peaked amplification are used. This amplifier is mounted in a metal box grounded to reduce the hum generally present in audio amplifiers DETECTOR \s will be seen by the diagram, a regenerative detector is used. Capacitative antenna coupling and resistance control of regeneration are pre- ferred to inductive antenna coupling and throttle condenser because : Dead spots are reduced to a minimum. Receiver remains calibrated. Regeneration is controlled easily Signals are steadier under large variations of regeneration control. Operation is smoother all over the scale. The detector is mounted on a metal panel to reduce body capacity and to simplify wiring. No ground is used though all connections common to the positive filament are soldered to a metal sheet screwed under the baseboard. 28-MC. COIL The 201-A type tube base seems to be the ideal form on which to wind the coil. Moreover, it is inexpensive and the amateur may wind dozens of coils at low cost and a saving of time in de- signing the proper one for his receiver. Four holes are drilled through the bakelite sides at an angle of 45 degrees. Next, four leads of

Page 20

tur the Ne 30 ed wire are soldered to the base vuught out through the holes, and | outside about 4 inch. (Fig. 1. fy the winding and save time in to correct length, or in taking all ewinding completely. form is ready, wind about 4 or 5 > or 20 d.c.c. or d.s.c. wire, spacing vering about 1 inch on the base nd about 4 or 5 turns No. 28 or me direction as the first winding wire coil is the plate coil. To wind ly twist a few turns around the nding from the coil form and then number of turns as mentioned is coil in your receiver, and try on the set. Look for oscillation uning dial from 0 to 100 and tion control to get steady os- It might be necessary to vary 1 condenser to avoid dead spots tes too freely and you cannot one turn of the plate winding of a monitor or any oscillator ne the frequency of the signals the beat note from the moni- ver and compute frequency. Be take a harmonic for a funda- is advisable to try and get a i4 me. or its fundamental picked up this signal from the which it is (let's say it is 14 from the coil you are testing tests to determine the frequency at the same time cutting off r turns if regeneration cannot the resistance. Try and get when about half of the re- ised. Just keep cutting the grid- you have two turns of wire left | see that regeneration still point regeneration ceases, it ry to discard the old tickler ind with one turn more than ns of grid-filament coil, listen in i4 me. and, if you cannot get irequency you can receive on or. Next space these two turns ise the frequency up to a point receiving on 20 to 24 mc. Now be running into trouble with Instead of cutting off some of nehing the 3 or 4 turns more again for oscillation; failing tickler farther away from the retest for oscillation. If ND, kler closer to the grid-filament his tickler is wound in the same ceep at this cutting game for OST JANUARY, 1930 quite a while if you want to get the set working. It might happen that you will fall on the right arrangement at the start, yet you may have to wind and rewind for hours before striking it right. That's one of the discouraging things about 28-me. testing. It demands more patience than skill at times. As has been said, you are probably around 22 or 24 me. All cuttings now should be on the order of 4 inch at a time and greater spacing should be tried. You'll finally get within the 28-30-me. band, and now all that remains is to cover all of it. Once more determine what portion of the band you are receiving on, always with the aid of the monitor. Let’s say you pick up between 26 to 20 me. Space the winding of the grid coil very slightly, and test with the monitor again. This ought to bring you up to 27-30 me or slightly less. Continue spacing the 116 to 2 turn coil, and you will end by getting right in the band If at this time you have failed getting right in 28-30 me., rewind your coil completely with a smaller size of wire, and repeat all of these tests Try larger wire if the latter does not suit Here are the dimensions of coils that cover the band at VE2ZAC-VE2AS Seven and one half inches No base with Cardwell 191-l variable condenser Frequency covered, 30.17-27.80 me Three turns No. 30 d.s.c. wound directly in center of coil form and over portion of grid- >) » d.e.c. on tube filament coil Regeneration is obtained without varying resistance, when about half the 50,000 ohms is used. Antenna condenser is at minimum capacity ACCESSORLES Use first quality equipment throughout if you want near to perfect results. Beware of dust and grit in any of the variable parts of the tuning accessories. If you are dreaming of those nice cushioned sockets which dance to and fro, just change your mind and use the good old sturdy and steady type. You'll have enough signal swinging without making things worse with the cushioned sockets If your front panel is metal, don’t use a metal dial for tuning, especially on 28 me. Metal rubbing against metal causes noise which spoils all reception. Use a bakelite dial, or if you have to use the metal one, place a felt fad between dial and panel to prevent the trouble mentioned The 50,000-ohm resistor might be of any good make, though Frost and Bradley units work very fine here. They are noiseless when varying the resistance Cardweil condenser 191-E. is the favorite for 28 me. here. Another condenser, the General Radio Type 55, gives full coverage when one of the rotor plates is removed. This condenser has, besides the rotor and stator commonly found iD bat full \ bac the the dite batt too batt LO0r cept

Page 21

hg rht to out 1an t in ha sts the ube ser in rid- "ing s is ity you and ing nice just rdy nal the etal etal oils ave dial ood ‘ork "ing for eral e of has, 1 in JANUARY, 1930 condensers, two circular rotors which act as a fixed condenser shunted across the tuning one With the General Radio condenser the coil for 28 me. varies but slightly from that described for 191-E Cardwell. REGENERATION TROUBLES Sometimes the receiver will stop oscillating While the tubes are lighted, take out the coil from its socket and re-insert it. This generally stops the trouble. Slightly tapping the detector tube or taking it out of the socket and re-inserting it will bring the set into oscillation once more If these methods fail, place your fingers on the coil and shake the tickler winding a little, pressing on it or trying to move it up or down just a frac- Cc, ae T jt Jo Amplifier cr T ‘ ; , . C4 C2 2 L 2 [ ‘i : Cs R2 i R, é +A- -B +45 FIG THE DETECTOR CIRCUIT ( late n t condenser ( Car ll ~pusfa 7 le ( 100-pyfd. Sa ixed con er ( OO= pp } J P er ( l-yuJ Sa mo fixed ce enser k megohm grid leal Ri -ohm ri t R 0000-ohm variable re for (See tert) L and li - Grid and tickler nding See text for det. Is tion of an inch. Any of the above, or all of them, cured the regeneration ‘trouble here whenever the set stopped oscillating. In some cases, to obtain steady regeneration it was necessary to wind a coil with as many as 8 turns on the tickler NOISES Very poor reception may result if the “B batteries are defective, even though they register full voltage \ hissing sound in the ‘phones and too much background noise are often stopped by taking out the coil from its socket and re-inserting it while the filaments are burning. These same noises are often caused by a chemical action at the storage battery terminal posts, action taking place when too much dirt and sulphate accumulate on the battery clips. Clean them and see that a very good contact is made right there ANTENNA \ny kind of antenna seems suitable for re- ception work. It must be well insulated and rigid. OST 2: An indoor antenna of fine wire (No. 26 d.s.c.) proves very satisfactory. SCREEN-GRID TUBES ON 28 MC The 4-tube screen grid receiver described in QST and in the Amateur’s Radio Handbook, is a very efficient set for 28-mc. work.! As the subject has been covered thoroughly in the above men- tioned references, repetition here will be unnec- essary. The detector part of the above receiver differs very little from that of the detector de- scribed in this article, and the procedure of coil making is the same. The troubles encountered can be cured in the same manner. DETECTOR TUBES The UX-201-B is one of the best detectors. It is non-microphonic, and the background noises are less pronounced than in the other types; in fact they are almost unnoticeable. Out of three dozen tubes tried out, every UX-201-B (six of them) surpassed the others. Better still, if you can get it, is the Northern Electric Nor-Phonic tube DX-235 — the best tube for ten meter work. Occasionally one will be found that is micro- phonic, but that is one in a hundred. Next comes the famous ‘‘peanut tube,’’ using dry cells for filament lighting (1.5 volts). It is almost a perfect tube as detector, amplifier or oscillator. This does not infer that other types of tubes are not good performers; they are, but the best per- formers are particularly mentioned.” READING MATTER In a succeeding article the transmitter will be treated; also a study on the autodyne receiver will be given. Te assist in the construction of your 28-me. equipment, the following references are suggested: OST, May, 1928, page 9 (How to get started on 50 me QST, May, 1928, page 11 (On the Ultraudion: a fine study on this circuit, with an abundance of dope and sketches QST, August, 1928, page 37 (A real encyclo- pedia on 28-me. transmitters actually in use by many amateurs). WST, October, 1928, page 31 (All about the 28 me. beam antenna at W1CCZ, with dimen- sions for duplication). WST, November, 1928, page 29 (A crystal- controlled transmitter). Cont ued o page 3O) YST, November 1928, Radio Amateur’s Handbook, urth and fifth editions, page 68 Unfortunately for the American amateur, these tubes re not on the market in the U. 8S. A. The UX-201-B is similar in characteristics to the UX-201-A with the ex- eption of the filament. The DX-235 resembles the UX- 201-B. The “‘ peanut tube,”’ also known as the “ N”’ tube, is ide in the U. 8S. A. by the Western Electric Co., but is not vailable to the amateur through the usual channels. Most of us must be content with the “good performers.” Editor.

Page 22

24 OST A Micro-Condenser for Amateur Band Tuners By A. L. M. Dingee* N tion with recent research work it necessary to build a very small idenser having a straight-line iracteristic. The general smooth- ness and reproducibility of scale read nstrument here described should maki is a tuning device for high fre- que l) ph shows the construction of the instru nd is self-explanatory. The fixed ed [CRO-CONDENSER br s an inside diameter of eleven- sixte inch. The movable cylinder has an meter of five-sixteenths and is drille {to make a force fit over the quar- ‘ + _ rn i i inl 0.2 0.3 04 os 06 07 MICROMETER SCALE FIG. 1 ter-i! micrometer head. This latter is sir e used on micrometer calipers and 1 ned through a hardware store for a llars; either the metric (centi- meter inch) type can be had, the latter thout vernier; both have a mo- tion of if this is fully utilized, the metric type e having twenty-five hundred *husetts Institute Physics, Mass: divisions, the English type with vernier ten thousand divisions. It is suggested that for radio work the former probably would be sufficiently finely divided and is very much easier to read than either English scale. Although the total movement of the smaller cylinder is one inch, both cylinders were made two inches in length to obtain the constant con- dition of the surroundings of the ends of the cylinders necessary for the desired straight-line relation between scale setting and capacity, one cylinder never being completely within the other. Fig. 1 shows the variation of capacity of the condenser and leads in micro-microfarads against scale reading. It will be observed that the total variation in capacity is less than two micro- microfarads. When employed in parallel with a fixed capacity of about 90 micro-microfarads to control a one megacycle oscillator this condenser permitted adjustment of the beat note to easily within a fraction of a cycle per second. When used in parallel with a 100 micro-microfarad capacity on thirty meters, it should cover a band about 100 kilocycles wide. If it is desirable to have the condenser cover a wider band, the fixed capacity in parallel may be reduced, at the same time increasing the tuning inductance. Thus if the previous value of 100 micro-microfarads be halved the band width will be doubled. Of course the same effect can be ob- tained by increasing the diameter of the movable cylinder. A convenient expression for calculating band width is as follows: df f de 2c where df is the band width in _ kilocycles, de the range of the condenser in micro-micro- farads from “‘all in” to “all out,’ f the fre- quency in kilocycles per second and c the total capacity across the tuning coil (including tube and distributed capacity) in micro-microfarads. Se Strays “ys If we continue to get any more free QSL cards, the regular printers will have to go out of business. C.C.R. of Hdq. recently built a novel filament lighting transformer. The transformer had nega- tive regulation, so that the voltage went up as the load was applied! JANUARY, 1930 JA tur esp ava of | bot! first volt the T was deal thar in tl dian The of th tou mit tape In at nece. 2 sec coil 2 sex coil Abou Iron « etc 1 Th remo slippe slight whicl heav serve Ws

Page 23

0 we 10 of JANUARY, 1930 OST A Power Transformer for the Lean Purse By E. H. Harrington, Jr.* NE of the most discouraging things about making up your own power and filament supply transformer is the difficulty of winding the 5000 or 6000 turns required for the center-tapped secondary, especially when no winding machine or lathe is available. Another discouraging thing is the cost of the material required. In this transformer both of these difficulties have been avoided; the frst by using honeycomb coils for the high- voltage secondary and the second by digging up the necessary material, at the least cost. The core is from an old power transformer and was secured from the local electric equipment dealer. It should have a cross-section of not more than 13, inches so that it will fit inside the hole in the center of the honeycomb coils. The inside diameter of the usual honeycomb coil is 2 inches. Therefore the maximum allowable cross-section of the core is 13¢ by 13¢ inches. It would be better to use a core of slightly less crovs-section to per- mit the winding of several layers of insulating tape over the core. In addition to the core, at approximately the the following material prices noted will be necessary : 2 second hand 1500-turn unmounted honeycomb coils $1.00 2 sex i hand 1250-turn unmounted honeycomb coils 1.00 About 55 lb. of No. LS or 20 dx enameled wire 1.35 Iron angles for mounting, bolts, binding posts, tape, etc. (mostly out of the yunk box) about 63 Tot il cost ibout S35 .US The first step is to disassemble the core by removing one “‘leg’’ so that the windings may b« Center Jap HOV. A.C FIG, 1 slipped on easily. Then make up a form of wood, slight 1, larger than the core cross-section, on which the primary is wound. Several layers of heavy wrapping paper are wound on first to serve as insulation between the primary and core. wor RR, 323 West Exchange St., Geneseo, Ll. The primary winding consists of 450 turns of No. 18 (or No. 20) d.c.c. enameled wire, the leads being brought out at the ends of the winding. After the primary has been completed, the fila- ment winding is put on over it, several more layers of heavy wrapping paper being wound on -———————_ THE COMPLETED TRANSFORMER Tt plie plate and filament power to one or two UN-210 over the primary before the filament winding is made. The filament winding is 40 turns for a starter, turns being removed later if the filament voltage is too high. After the primary and filament windings have been made up, thev should be slipped off the form and pus! »¢ on one leg of the core. If the primary does not tit 21¢ core snugty, flat strips of wood may be used as wedges to hold it tightly in place. The hiJh-voltage secondary should be as- sembled next. Place one of the honeycomb coils on a piece of good heavy cardboard and mark out the outer and inner circumferences with a lead pencil. Kight such pieces of cardboard should be laid out, two to go between each honeycomb coil and its neighbor and two for the ends to in- sulate the windings from the shorter legs of the core. After cutting out ‘he insulating dises, they should be boiled in paraffin to inake them mois- ture-proof and the high-voltage winding is ready for assembly. If there is room for a little addi- tional insulation between the core and the insides of the honeycomb coils, several layers of insulat- ing tape may be wound on the core before the coils are slipped in place. After the coils have been placed on the core, rounded wooden wedges should be pushed in to hold them firmly in place. The leg of the core (Continued on page 72)

Page 24

OST ‘“Twenty-Meter” ’Phone Authorized New istas Unfold as Commission Opens Part of 14,000 Band to Specially Qualified Amateurs ition of the A.R.R.L. the Federal Commission has opened the r frequencies from 14,100 ke. to 00 ke. to amateur radiotelephony by t f extra class amateur operator's licer r amateurs of undoubted techni- Now “20-meter ’phone’”’ is On r 6th the Commission issued Gen- er 76 in which it modified its last umateur telephony in such a way band 14,100 to 14,300 ke. (21.28 to 20 provided, however, that oper- atior nd of 14,300 to 14,100 kilocycles wil | only by operators holding extra Cnc tor’s licenses or, lacking such li- ( rs who in their applications for stat how special technical qualifica- tior ) operate within the limits pre- On 12th the Radio Division De- meree, transmitted the gene ral Oo rvisors of Radio, with instruc- \ iv station licenses permitting ied to those prope rly qualified rted on the face thereof, in the vdditional telephone band.” extra class amateur licenses wl a-facie evidence of qualifi- ilege. Holders of this grade of » wish to work "phone in this letter of application to their > rning their station license for en- d to confine the right to work | to the better-qualified ama- operator license require sa rds per minute and there ts re quiring more than the nor- peed of 10 words per minute of ‘phone stations. Therefore phone in this band will also be urs who apply and “show ifications and ability to Op- imits prescribed.” Amateurs oficient in the use of ‘phone difficulty in securing the / ted that, unlike most ama- e is not made immediately ders of the extra class opera- idual application must he rrul endorsement of the neu band secured on the station license, before operation may begin. Action to secure the high-frequency ‘phone privilege dates back to May of 1929 when the A.R.R.L. Board of Directors, at its annual meet- ing, voted to ask the authorities to open the whole 14,000 band to amateur telephony by specially- qualified amateurs. Application was immediately filed at Washington. The Supervisors of Radio were canvassed, and reacted favorably. The Com- mission then delayed action until after the C.C.1.R. meeting at the Hague, to see if any deci- sions affecting the amateur were adopted. That over, study was resumed. The engineering divi- sion of the Commission considered the possibility of long-distance interference with very impor- tant commercial services bordering upon the ama- teur band so serious that they were willing to recommend the use of ‘phone only in the central 200 ke. of the band. These are the figures ap- proved by the Commission in November. The effect is to provide a 100-ke. guard band on each side of the telephone band, also retaining part of the band exclusively for amateur telegraphy. The 14,000 band is the narrowest amateur band. It contains but 13 two-tenths per cent tele- graph channels. Unskilled operation of a very few amateur ‘phones which “wobbulated”’ badly would render the band useless to everybody. That is why our Board requested that the right to oper- ate "phone there be limited to amateurs of demon- strated technical ability. It will be a hard job to make a good ‘phone on 14,200 ke., one that gets speech through to distant lands, and it is certainly not beginner’s work. However, amateurs of ex- perience and of technical qualifications at least as great as that required to pass the extra class operator’s examination, particularly if they are familiar with modern ‘phone operation as has been treated at great length in QS7' during 1929, may expect to be authorized to tackle the job. A new world now opens its doors. GST will help with authoritative information as fast as it can be garnered. Reports of your experiences will help. kK. B. W. Se Strays “Ss. Huddy, WIII, reading the article by Windom on antennas and noting that the antenna spec ified worked OK with feeders up to 1200 feet thought he would carry this experiment a little further — he made a feeder 2000 feet long. It worked! JANUARY, 1930 thi nes gra hin use bet hin tan his Wy slar bra $0 I are, mar par: on “> Vv

Page 25

1930 1 to ration phone n the meet- whole clally- liately Radio Conm- r the y deci- That r divi- ibility mpor- > ama- ing to entral “Ss ap . The 1 each y part phy. rateur t tele- ry few badly . That oper- mon- lob to t gets tainly of ex- least class ry are s has 1929, ob. ’ will as it ences W. ndom cine dl yught JANUARY, 1930 OST Hams are Born—Not Made By “Felix’* AYLAND MARTEL “SOUP- BONE”) GROVES, otherwise 5NW (now doncha go to critincizin’ — this was in the days before the funny little “W” was stuck on for dead-end effect), and I sat in my shack after a hard night DXing. When I say “hard night,’’ I mean four hours spent dodging broad sigs, QRM, QRN, receiver heterodynes and neighborly buckshot; all the while fanning the fil. transf. and cajoling the antenna ammeter with one hand and pouring water in the rectifier jars with the other. “Hams,” says Soupbone, stretching out his scrawny legs on my desk and putting his feet in the middle of my single circuit static inhaler, “are born and not made.”’ ‘In the same manner as porcelain antenna wire!’ I snorts, not only bein’ disagreeable on general principles, but also because he’s clicked wid three Aussies and a Zedder that mng, leaving me holding the sack wid a single Hawaiian “Just like five watters,”’ he returns, ignoring me, ‘‘mebby they all look alike and all cost eight plunks per each, but there’s one in a dozen that'll stand the gaff!” For verification he points at the row of dead soldiers | got strung along the wall “Just who,” I asks, ‘‘do you refer to as bein’ a born ham?” “Niv own beloved brother-in-law, 5X XX!”’ “That megowit? T’lissen to his fist you'd think he was a Alabam’ darky ahold of the busi- ness end of a pumphandle in the middle of a dark graveyard! Be your wavelength!” ‘Nev’ mind,” says he, “‘he’s a born ham.” “Born-and-made, but when they assembled him they musta left some gears out. The only use that egg has for his head is for insulation between his ears.”’ “Lemme tell you somethin’,’’ he begins, helpin’ himself to my cigs and strikin’ a match on mi tank tuning dial (?*!! a “You think,” | breaks him, “‘that your bein’ his brother-in-law makes him a ham by proxy. Wy if that goof would call me I’d sue him for slander, libel. “3 “Lower your input. You're overloadin’ your brain if any. Just because mi sis wouldn’t so much as go to a hop wid as big a bum as you are, you get off-wave ‘cause I say the guy she married is a real ham.”’ “A whole roomful of factory-boughten ap- paratus that a sap can’t make oscillate except on Monday, Wednesday and Friday makes a *W5LS, 1821 W. Chestnut St., Denton, Tex BCL a ham, does it?” I asks. “Tl admit that 5X XX don’t punch out so well wid his two fifties as we do wid our fivers, but just the same * “If that milliwit would stay on wave he might raise a ‘9’ early some mng when the QRM wasn't bad. The only time he’s on wave is when he’s passin’ thru the band!” “I suppose,”’ scoffs Soupy, “‘if he'd throw all his equipment in the junk heap, rif up a sway- back antenna like yours, tie a coupla bricks to his ctpse to reduce QSS, an’ hang his fil. transf. under the table in a bucket of ex-automobile oil, you'd call him a ham!”’ “That guy thinks a kilocyele’s got valves!” “This mng while I was layin’ in my bunk tryin’ to figger out hw I could stack a few more watts on the plate of mi 202 and still keep it fm pourin’ down in the base, I overhears sum first rate gossip the Ma is QSTing to the OM.” ‘*Abt the size of th’ light bill?”’ 1 ventures. “Naw, I got that cured by blowin’ some emery- dust in the meter bearings. This is abt sis an’ her yes-man.”’ The gossip 5NW relays to me sounds some- thin’ like this: ‘George,’ says Soupy’s Ma, ‘‘our son-in-law is a brute!” “Uh huh,” fm 5NW’s OM, “all men are. What's the matter now?”’ “He flatly refused to buy Milly a dress when the poor child’s almost naked now!”’ “That's right,’ says the OM, ‘‘even tho she’s got more clothes than the Salvation Army!” “Oh, why did I let her marry that crazy radio nut anyway?” ‘Let her!” snorts Pop. “‘ You didn’t have much to say about it. They wus married two weeks before we knew it. Besides, it better be radio gadgets than likker and wild parties wid other wimmen!” ‘**Milly sez,"’ comes back Ma, ‘‘that he went and bought a fifty-volt tube or some sort of doo-dad with the money she coulda bought a new sport dress with.”’ “On topa that,’’ retorts the Big Gun, ‘‘you’re gettin’ close to home when you run down radio. Your own darlin’ little Martel spends half the night DXing whatever that is — an’ he don’t even eat without the edge of some radio magazine in the soup plate!” \t this point in the gossip, I breaks him and advises him that if he don’t quit messin’ wid the adjustments on my bug, I'd install him wid com- plete mayhem equipment

Page 26

thr. Q | y “ly e the point,’”’ says Soupy. “I’m to you that 5X XX has got the bug to prove it!” I snorts. “‘ And kel mistreats his wife, does it 1 ham? I once knew a bum who ‘e a day durin’ the week an’ inday, and yet he didn’t know triple-pole switch!” rains for a walk, they need the the little argument a tie, on vin’ a 9 a.m. class at college QSY down to the telephone ired jacks an’ stole solder eight y eves on the clock and my ipbone for several days, but ts an earful of 5NW receiver to mention the _ third-rate, w noise he’s got the nerve to Iso hears 5X XX’'s anemic sig lissenin’ to one of my clothes- Mebby ‘“‘cave-manning”’ his ter ham outta him, but you his fist. It still sounds like the vy are. I hear him askin’ 5DM to raise his radiation. 5DM ke the shunt off his ammeter! ringy’’ Vannoy likes him about later I actually hears 5X XX fr three mngs in succession as bein’ one of those guys elephants with straw hats and n’ settles down to rebuilding hree circuits to scare off QRM us in the back yard chasin’ for usin’ mi counterplunk SNW blows in with a big grin wst shouts Hartley ckt is better than the you'r’ all cock-eyed!”’ I sup- h an lissen a while! You uu abt 5XXX an’ Milly developments. Nevermind put , rns out to be Dr. Stiminetz 1 pyrex arm?” I asks hope- t even QRK. began 5NW) 5XXX fties to smile instead of blush | fr him to please come to bed first 45 minutes ‘cause clamped close to his head | CQin’ fr him an’ QRTs uurs later she wakes up an’ nk. She gets up an’ stumbles etaneces, an’ whatnot into raised his first ‘6,’ an’ by was ir the } l | I Ost shutting his eyes an clampin’ the cans tighter, he could almost hr the ‘6.’ *** Are you ever comin’ to bed?’ she asks. ““*Pipe down!’ he yells in a voice that could be heard to Hickory street. ‘I got 6CCT!’ “Right then Milly starts up the tear-generator an’ throws a cryin’ jag. She first bawls QRZ, then ORK, an’ finally abt R14, but still he didn’t even turn around. She stands on her tiptoes an’ accuses him of almost ev'ry thing from havin’ halitosis to soakin’ his invilid Granmommer in the eye wid a sock full of stove-bolts. Still, he don’t even hear her. ““As a last resort, she jumps over an knocks his receiver off the table onto the MG. It lands bottom-up on the shaft, an’ what the couplin’ didn’t do toward scramblin’ it, the 1500-volt leads did! ‘““When the burnt-rubber smoke screen blows away, he looks at her once, grabs a stray piece of bakelite panel, turns her over his knee an’ gives her the goshawfulest lambastin’ she ever got. He did a job the OM would be proud to claim! “She naturally runs home to Ma, while he sits around, dumblike, lookin’ first at the remains of his three toob hetrodyne-brewery, an’ then at the kitchen sink full of last nite’s dishes Finally he wraps some junk up in a bundle an’ trekks off to work. ‘By the aid of much blah-blah, Ma gets Milly calmed down a bit, an Pop hasta make a quick QSY to the radio shack to keep them fm seein him grin. Ma can’t get Milly in the idea of gettin’ back in synchronism wid her ‘tyrannical, brutish, maniac, whatnot husband,’ but finally she is begged into the notion of goin’ back fr her clothes. At this stage of the game T.O.M. grabbs mi fone an’ does sum QRQ telephonin’ in a tone so QRZ that I couldn't hear wot he says or who he was QSO. “Milly musta been gettin’ ready to leave 5XXX’'s QRA abt the time 5XXX_ blows in This time he’s got two bundles. Guess what's in ‘em? One of them is the new sport dress Milly's been CQing so long fr. I dunno what he says to her, but he musta done an artistic job of it, ‘cause it didn’t take him but half an hour an’ three good crys to get her to begin QSOing the dishes an’ stirrin’ up some chow ‘While she’s removin’ the a.c. ripples fm the chinaware, he unwraps some receiver parts to take the place of those that’s been fried that mng. Besides that, he’s got one of these new seven-an-a-half watters. Ever’ once in a while, he'd come in the kitchen wid a condenser in one hand an’ a screwdriver in the other an’ ask ‘Tow is ‘ittle tootsie wootsie?’ an’ then make 4 dive fr the shack agn. “TI don’t know anything more except that this a.m. I heard an Aussie CQing, an’ called him 'til (Continued on page 30) JANUARY, 1930 of an ho sta wa on I cro nul the gro bla: rea vali I tion fact ala tos by the T are | sect. cut for f shov "a" 'p plate: Cryst Exan Cutti (Corr Plate: 1928; Contr mente 70) Coeffi July, Wh parall electri (Th Wh Z) an (Thi Whe

Page 27

Pr, ld or Z, r't in’ in’ he ds in’ lt ws to at nis til JANUARY, 1930 OST Quartz Crystal Facts By J. Herbert Hollister* ITH just a year of the narrow- band era behind us, we find the ranks of the quartz crystal exponents grow- a ing daily. At this time last year most of us thought crystal control was only some trick arrangement for the other fellow to play with and squander his money on. There were few, however, who did not envy the crystal controlled station with the beautiful bell-like note which was always to be found at exactly the same spot on the dial From sheer necessity, brought on by the crowded condition of the bands, increasing numbers of us have turned to crystal control for the solution of our problem. Naturally, with this growing demand, prices for quartz plates and blanks have been forced down until they have reached a level where they represent the best value on the amateur’s shopping list Educational articles in QS7' and other publica- tions have done much to call our attention to the fact that the grinding of crystals is not necessarily alaboratory job.! The following facts are intended tosupplement previous articles, and are prompted by many inquiries which have been received by the writer The two common axes on which plates are cut are shown in lig. 1. The sketch represents a cross section of crystal, and lig. 1A shows the ‘‘thin”’ cut. That is, plates cut on this axis will be thinner fora given frequency than those cut on the axis shown in 1B, which we will call the ‘‘thick”’ cut *W9DRD, Edwardsville, Kansas ! Details of crystal structure, cutting slabs and grinding plates are contained in the following QST references Crystal Control for Amateur Transmitters, Nov., 1925; Examining Quartz for Oscillator Use, Sept., 1926; Crystal Cutting (Correspondence) Feb., 1926; Looking at Quartz (Correspondence) Nov., 1926; A Method of Grinding Quartz Plates, May, 1927; The Grinding of Quartz Plates, Jan., 1928; A Crystal Grinder, May, 1928; Debunking Crystal Control, Dec 1928; New Crystal Fragments (Experi- menters’ Section) Nov., 1929 Eprror *Observations on Modes of Vibration and Temperature Coefficients of Quartz Crystal Plates, Proc. of I. R. E., July, 1929, and Bell System Tech. Journ., July, 1929 When the plate is cut so that its major surfaces are parallel to the optic (Z) axis and perpendicular to an electric (.\) axis, 112.6 f t This is the “thick” cut When the major surfaces are parallel to both the optic Z) and electric (X) axes 44 (This is the “thin” cut Where ¢ =thickness of plate in inches frequency of oscillation in kilocycles per second. Ep1ITroR Both cuts are desirable for use in the amateur bands, and each has its own peculiarities which must be understood before attempting to produce a finished plate from the blank. THE THIN CUT Plates cut on the axis parallel with any true face of the crystal, as shown in Fig. 1A, will average approximately 3.9 meters per .001 inch of thickness. This means that a plate ground for the top of the 1750-ke. band will be about .044 inch thick. Since the frequency increases in B FIG. 1 inverse proportion with the thickness of the plate, as long as the axis remains unchanged, we know that a 3500-ke. plate cut on this axis will be about .022 inch thick, and a 7000-ke. plate will be about .011 inch thick This cut is quite desirable for the two lower frequency bands but not so good for 7000 ke., as .011 inch is not much of a thickness for any- thing to have, let alone a substance as brittle as quartz. Then again it is very hard to keep low spots out of such a thin crystal due to pressure from the finger while grinding. An interesting thing about plates cut on this axis is that they apparently refuse to oscillate if the center is ground even slightly thinner than the edges. These plates are very easy to make oscillate and will usually kick off very nicely if the two faces are brought to within .002 or .003 inch of parallel, even though the faces are quite rough from grinding with a coarse abrasive. It is of course desirable to grind all the chips and nicks out of the edges but this is not really necessary with plates cut on this axis. This edge beveling is best done on a small carborundum stone using light oil just as in whetting a knife. The best routine to follow in grinding the plate from a blank cut on the thin axis is to first finish one face with FFF carborundum or alundum

Page 28

grait e rays of an electric light are seen to be ected from its surface. This face will the s a reference face and all grinding don ther side. When grinding a 3500-ke. plat igh grinding (done with No. 100 gra glass lap with a little water to prev ing) should cease when the thick- ness bout .025 inch. We will assume that this is fairly uniform over the whole plate t there are no low corners. The s best done on a new piece of glass | a piece of light glass such as half roscope slide placed on top of the cryst n it and prevent the center from than the edges. Just a little the crystal and the top glass will rystal to adhere to it. When the plat 1 thickness of about .023 inch it frequency test in an oscillator and s t on down to the desired point. with rain an gril er mm en THE THICK CUT the axis at right angles to any tru rystal, as shown in Fig. 1B, will avel ximately 2.6 meters per .0O1 inch of t his will make the 1750-ke. plate ul h thick, the 3500-ke. plate about 032 und the 7000-ke. plate about .016 incl eems to be essential that there be I ness in the center of the plate l, in fact, much greater output is th this cut if both faces are ground slig by applying pressure at the For this reason this cut is lates of lower frequency than is not much bend to a plate ch, and it is hard to grind the the edges tant that the edges of plates cut ground entirely free from nicks lr een found that many of these : scillate until the edges are care- though the grinding job is Cel ? ing taken out of the center, the t two frequencies quite close toget mp back and forth in a most er lt mon to find a spot in the center or} s ce scribed above, and corre- ts on the upper and nether holder. These spots are prob- ib] brush discharge between the two tes and the heat so generated mig ! int to enough to rupture the ' f r there is very little danger of this 0002 inch thinner than the iired in producing plates from bla: thick axis, but the added bulk of rable at the higher frequencies. Res that there is little or no difference

OST

JANUARY, 1930 in the output of the plates cut on the two different axes. 7000-KC. PLATES Generally speaking, too little attention has been given to plates ground to a fundamental frequency of 7000 ke. One of these thin plates has been used by the writer in a transmitter for the past two years with a 210 oscillator using from 150 to 600 volts on its plate. The crystal is still perfectly good and its use makes it possible to work in the 14,000-ke. band with only one doubler- amplifier In grinding a plate to a fundamental frequency in the 7000-ke. band, only slightly greater care is needed than in grinding one for 3500 ke. Using the thick cut, the variation in thickness should not exceed .0001 inch, and the center of the plate may be left .0001 inch thinner than the edges If the above memoranda serve directly or indirectly to help more little crystals into this tempestuous world of amateur radio, well and good for all concerned. Those of us who are now using crystal control know that we would not care to be on the air at all without that ever active bit of vibrating rock which keeps our note always the same, and on the same frequency. Hunting Trouble on 28 Megacycles Continued from page 23) QST, January, 1929, page 9 (a review of the whole subject including data for the antenna If you are not discouraged by this time, go over the issues of QST for 1926 and 1927 and read all about 5-meter work. This will prove very bene- ficial to the 28-me. experimenter. Hams are Born— Not Made (Continued from page

-

Page 29

930 rent has ‘ntal lates r for rom still e to ler- ney re is sing yuld late Ss or this and 1OW not ver ote the ver all ne- be is ut st f JANUARY, 1930 Ost Matching the Speaker to the Output Tube The Design and Operation of the Output Transformer By J. M. Thomson* the output tube or tubes a supplies speakers EpIror In usual audio-frequency power amplifier practice, too little attentior nd the speaker. It often occurs that the otherwise good design of an amplifier is nullified by improper coupling between the output and the reproducer practical data for the design of satisfactory coupling transformers for both magnetic and dynamic types of paid to the output coupling device between i I I Mr. Thomson points out the considerations involved and UE to the extended use of power tubes with magnetic and dynamic types of speakers, the use of output transform- ers to match the speaker to the tube has become of vital importance. ‘‘ Magnetic” is here used in referring to permanent magnet moving armature types of speakers, while “dynamic” is used in referring to moving coil inertia controlled types. The following paper gives a general idea of the operation of output transformers. The standard connection for an output trans- former with a power tube and speaker is given in E, dann FIG. 1.— TYPICAL CIRCUIT FOR POWER TUBE WITH TRANSFORMER COUPLING TO THE SPEAKER Fig. 1. Fig. 2 gives the equivalent connection as far as a.c. voltages and currents are concerned. Using Kirchoff’s Laws and the symbolic method, the current in the speaker can be developed in terms of the tube, speaker and transformer con- stants. The formula for the speaker current, /2, 1s I wME : © MR Re = X41. X20? M2) (1 + (R.X1+RiX24+ RX)? Where w=2X3.14Xfrequency in cycles per second. M =mutual inductance in henries. '=a.c. voltage applied to the grid of the power tube, multiplied by the amplification fac- tor of the tube. 4 * Ferranti Electric, Ltd., Montreal, P. Q., Canada R,=total resistance in the primary circuit in ohms. = plate resistance of the tube plus the primary resistance of the transformer. R.=total resistance of the secondary circuit of the transformer. =resistance of the speaker plus the resistance of the secondary coil of the transformer. X,=reactance of the primary coil of the trans- former. X».=reactance of the secondary coil of the trans- former. X =reactance of the speaker. In a good transformer with the usual values of leakage inductance, w? M? = X,X_ wM =nX, Xo = n?X;, Therefore: nX,E == ——— — . Vv (Rik: - X,X : T RX, T Ryn?2X, (2) | R, X )2 The power input to the speaker is /,*r and for ‘‘r”’? a constant will be a maximum when J, is a maximum. A little experimenting with Formula 2 will show that the values which affect J. the most are the primary reactance, X,, and the turn L — t T2,%2 x FIG. 2. — EQUIVALENT CIRCUIT OF THAT SHOWN IN FIG. 1 ratio, ‘‘n.’’ The primary and secondary resistance affect the current, J2, but not very markedly. The following tabulation shows the effect of changing the primary impedance of an output transformer:

Page 30

OST primary inductance should be measured with direct current (equal to the normal plate current) JANUARY, 1930 SPEAKER AT 50 CYCLES 2000 ohms 1500 ohms 1000 ohms 1000 ohms 1950 ohms tube Speaker Power Input Current to Speaker in Mills Milliwatts 14 3) CYCLES 2000 ohms > ohms 1000 ohms l ohm ( les 5 ohms 201 ¢ 3.5 l of tube 20 volts r Speaker Power Input Current to Speaker n Mills Milliwatts 205 210 244 296 20) to 260 340 speaker the current in- ary impedance is increased. ype, when the primary im- | from 2000 to 15,000 ohms, increases 46°;, giving 112‘, ith the dynamic speaker the uses 27°, with a gain in he power input for the primary impedance is the power input to the speaker. the power input to magnetic ers when the turn ratio (nm) is gnetic type the power input reasing trequency. This cor- teristics of the speaker and ore uniform response. These t with this type of speaker inge radically the balance notes by changing the turn lynamic speaker are similar, for a perfect speaker is of frequency. The loss in requencies is due to reduction tance with frequency, and yueney should be carefully the best possible balance \ trans- rv inductance of 40 to 50 practically a flat curve. The irequency notes. flowing in the coil. The voltage to be used in making the inductance measurement should be | t+ + ee a wee FREQUENCY 8 Cr ee FIG. 3 POWER INPUT PLOTTED AGAINST FRE- QUENCY AT VARIOUS VALUES OF TURN RATIO WAGNETIC TYPE SPEAKER Plate impedance 100 ohmea Pr mary Resi fance 1) ohme Secondary Resistance 00 ohms Speaker Resistance O00 ohms Primary Inductance 'O henries Nec ndary Inductance ‘ti henries S pe ther Inductar ‘ henries 0) volts (rm mpressed on gna fighne * Je the rat primary tur? to secondary tur? equal to the a.c. voltage that will be impressed on the coil when operating under normal condi- tions. The inductance should also be measured at a number of frequencies in the audible range to get the effect of the self-capacities of the pri- mary and secondary coils. For example, a UX- 171-A tube has an amplification factor of 2.5 and a plate current of 20 mills at 180 volts ‘‘B” and —40 volts grid bias. It is assumed that experi- ments will be made using a 15-volt (r.m.s.) grid swing on the 171-A; then the inductance measure- ments should be made with 20 mills d.ec. in the primary coil and an a.c. voltage of 2.5 15 =37.5 volts. When used in a receiver the grid swing on the output tube will vary over a wide range. In this case the worst condition is assumed and an a.c. voltage of 1 te 2 volts would be used. The correct value of ‘‘n”’ for a given set of conditions can be obtained mathematically by differentiating Equation 2, variable and then solving for ‘‘n. it will be found that using ‘‘n’’ as the If this is done ) | / ite n=. /1 re. VCX2°\ Re for maximum power input. If the primary react- ance is very large as compared with the total resistance in the primary circuit, RR? [RP +X Oand n? \ \V R This is the commonly used impedance ratio formula. Two things must be noted about this

Page 31

s() th it) in be ‘oO ed (li- ed ge an of by he ne et- tal 110 JANUARY, 1930 formula. First, 22; is equal to the plate resistance of the tube plus the resistance of the primary coil and 2, is equal to the resistance of the speaker plus the resistance of the secondary coil. Second, the turn ratio is not independent of frequency unless speaker reactance is zero. This means that generally it is only possible to set the conditions to give the maximum power input at one fre- quency. 10 Te . mir Jat aT T 2 500, t—t-—t-++++¢+ + tt $—+-+-+++++ £ } | 3 aso $—+-+4 444 t + +++ . n ‘ 00 + $++4+ N ~ +—+ + +++ 0 10 40 SO wmwee 2 9 4 Sereswoo 2 3 4 Se T8%s000 FREQUENCY (N CYCLES PER SEC FIG. 4. — POWER INPUT PLOTTED AGAINST FRE- QUENCY AT VARIOUS VALUES OF TURN RATIO, DYNAMIC TYPE SPEAKER Plate imped ‘ 0 ohms g , hv Spe hm Pr I f henric Sec . 2 henrte Spe } , Am} It is apparent from these considerations that the power input to the speaker, and consequently the tone quality, can be changed by varying the value of the primary impedance to the turn ratio of the output transiormer. To obtain the best results the primary inductance should be made as high as possible and the turn ratio chosen to give the maximum power input with the proper balance between the high and low tones. The resistance of the primary and second- ary coils of the transformers should be kept as low as possible to keep the copper losses in the transformer small and the efficiency high. In magnetic speakers it will be found generally that if the ratio is chosen to give the maximum input between 40 and 60 cycles, good tone balance will be obtained. In dynamic speakers the turn ratio should be chosen to give the maximum input at the lowest frequency to be amplified. The power input to a speaker is also affected to some extent by the leakage inductance and the self-capacitance of the primary and secondary coils. The leakage inductance is due to the fact that it is not physically possible to put two coils in the same place. This causes each coil to have some magnetic lines of flux which do not link with OST 33 the turns in the other coil. As a result of this, each coil acts as though it had a small choke in series with it. The net result is a reduction in power input to the speaker. The reduction in power varies with the frequency and the reduction is, in general, greatest at the higher frequencies. The overall tone quality of a set can be changed by the use of a high leakage transformer. For example, if the speaker has a response curve that rises at the higher frequencies, the use of a high leakage transformer will reduce the high frequency power input more than the low frequency input and the overall response will be more uniform. The leakage reactance will vary directly as the square of the number of turns in the coil, inversely as the length of the leakage path and directly as the width of the leakage path. The width of the leakage path depends on the width of the coils and the gap between the primary and secondary coils. The leakage inductance can be reduced by dividing the primary and secondary coils into a number of sections and interleaving the primary and secondary sections. Fig. 6 shows a primary coil interleaved between two sections of secondary winding. A capacity effect is obtained whenever two conductors separated by a dielectric have a voltage impressed on them. If the surface area of the conductors is small and the distance between them large, the capacity will be small, although this small capacity may be large enough to be- come an important factor at high frequencies. In transformer coils a voltage is induced between turns and between layers. The surface of the conductors is small, but the spacing is also small and the self-capacity may be appreciable. Che result is equivalent to an infinite number of condensers in series and in parallel. As a first approximation this capacity is usually repre- sented as a small condenser shunted across the coils. In the output transformer the capacity is FIG j TRANSFORMER COIL WINDING DE- SIGNED FOR MINIMUM DISTRIBUTED OR SELF- CAPACITANCE ) Since the ect? mostly air, its losses are lou generally small and increases the power input to the speaker. If the self-capacity is increased to a large value it will eventually act as a short circuit and reduce the power input to the circuit. Fig. 5 shows the construction of a coil which has been designed to keep the self-capacity low.

Page 32

| into sections and air is used as the pn sulation, rt n is: What limits must be set to the ntities to arrive at a good com- mer rmer? For example, the greater the im f the transformer, the greater the resis erefore the greater the losses in the r. However, the following values hav ind to give very satisfactory res rl reactance at the lowest frequency to | ed, usually 50 eycles, should be at | is large as the plate impedance of the t results will be obtained if the pri nee is five times as large. The OST JANUARY, 1930 Accurate Wire Wound Resistors HI use of B-battery substitutes has been responsible for many very good resistors being made available to the amateur within the past few years, and the description of another wire wound resistor might not seem worthwhile. But when one considers that the recently announced “Super Akra-Ohm”’ units are wire wound, non-inductive units, may be obtained in stock sizes of from 5000 ohms to 5,000,000 ohms, that the units are constructed to insure insulation to withstand undesirable atmospheric conditions, that they will dissipate 1 watt safely, and finally that they are available __. to within 1°% plus or minus of their specified resistance, it seems that these units would be of interest to the amateur, ‘The units are constructed in “pies,” the wire being wound in opposite direc- tions in alternate pies so the resistor is practically non-inductive. They are pro- vided with 8-32 terminal clips which per- mit quick experimental set-ups. The units are sufficiently small to be mounted in the usual grid leak mounting, The 6-M resistors are supplied to 1% plus or minus of their specified resist- FI FORMER COILS WITH PRIMARY WINDING (Oy . gomuente ae ada -_ ETWEEN TWO SECTIONS OF SECONDARY ane e yu more acc ura ti unl S may WINDING be obtained upon special order from the a a ee Shallcross Mfg. Co., Collingdale, Pa. pri e of the secondary coil should Ge Strays “es be than one-fifth of the speaker - Oe ° ‘ magnetic weaker. F st . , . . . agneu — Kor While visiting the General Electric Co. plant re wn + dg t at -ageng ary at Littsfield, Mass.. recently we got to speculating —_ e ieee Caen "The os at “0 wil about radio reception in and near Pittsfield. ter r resist: ’ » speake ; nr . . erent ae . vith, The high voltage laboratory has a five-million ov quite SI . . f . . . sa g erg 7 = \ * volt transformer together with its proper con- ser tane ( »~f} >» snes ’ . . ee one-hith of the speaker dunsors and spark gaps, and when this equipment resi eakage reactance ol the trans- . ' Ry gets going —.: forr ess than one-half of 1°, unless a th nse is to be corrected by the ee . - : * . r Phe cut label on page 18 of the October issue outt rmer The self-capacity of the , Bie : , oat , . of GST had the designations of the coils L, prin | be made as small as possible. . sad , and Ls transposed. The coils with the greater the transformer should then ; . : : number of turns should have been marked Ls. be he formulas given in the first par er. Occasionally, because of the See res} f the speaker, the value of ‘‘n’ Lightning struck W9BAN some time ago and for power input is not the value rather thoroughly demolished the tubes, trans- wl the best overall response curve formers, meters, relay, condensers, and welded checked experimentally and th two or three taps in the st e very useful in carrying out the the value of the turn ratio, ritical, and it will generally be foul iriation of +25, from the correct rat ect the results very materially. the key contacts together. Taylor's saying, “Lightning can’t strike my antenna ’’ should be made one of the famous last words. A copy of 1929 (Volume XIIL) QST index was sent loosely with a copy of December going to each subscriber. If you didn’t get yours, please let us know and we will promptly forward one. Newsstand readers may obtain a copy of this in- dex by sending us 4¢ in stamps, ty] reg cal me dis ans ( A este stri pec is ay thei Stat. Q regu A tion even confi origi outsi natu *In with | appeal

Page 33

ng. ist- lay the ant fing eld. lion ‘on- rent ssue ;L ater 3° and ‘ans- Ided / my : last . was ig to se let one. is in- January, 1930 OST Passing the Government Examination for Amateur Operator’s License By Beverly Dudley, Assistant Technical Editor Part 1* IMPLE as it is, the examinations given by the Department of Commerce to prospec- tive amateurs are too frequently the down- fall of the radio neophyte. It is with the idea of indicating the type of questions asked during the government examination as well as aiding the prospective amateur over his first real difficulty that this article is written. The examination for an amateur operator’s license does not include all of the questions given in this article. Generally the examination consists of but ten simple questions. This discussion of the subject is necessarily more extensive and com- plete, with enough additional material added to the essential questions to give some background to the minimum required amateur knowledge. The person who can send and receive the signals in the International Morse Code at a speed of ten words per minute (five letters to the word) and can answer the questions in this article should have no fear whatever of the government exam- ination. The answers to the questions asked in the examination may be found in “The Radio Amateur’s Handbook”’ as well as here The examination contains questions of two types; questions relative to the radio laws and regulations and those intended to disclose the candidate's technical proficiency. In this install- ment the first mentioned class of question is discussed by the means of typical questions and answers Q. 1. What is an amateur? A. 1. A radio amateur is an individual inter- ested in the art of radio communication from a strictly personal point of view and without pecuniary interest. In radio regulation the term is applied to those who have licenses and operate their own private transmitting and receiving stations Q.2. Why are amateurs subject to federal regulations? A. 2. Some regulation of all radio communica- tion is required to prevent chaos. Signals emitted even by very low-power transmitters, are not confined to the State in which the signal is originated, and since interstate communication is outside the jurisdiction of the various States, it naturally comes under federal jurisdiction *In two parts. The second section of this article dealing with technical matters in the amateur examinations will appear in the next issue of QST. Q. 3. Are amateur stations subject to state or municipal regulations? A. 3. No, except as the latter may exercise a legitimate police power in safeguarding health, enforcing electrical codes, and abating nuisances. Q. 4. What are “quiet hours’? Under what conditions are they imposed? A. 4. Quiet hours, from 8:00 p.m. to 10:30 p.m. local time and on Sundays during the broadcast of local church services, are imposed upon amateur stations which interfere with other radio services. No quiet hours need be observed at amateur stations operating without interfer- ence to other radio services Q. 5. What is the Washington Convention of 1927? A. 5. The Washington Convention is an inter- national treaty on radio communication drafted at Washington, D. C., in 1927, which sets forth rules and regulations relative to modern radio communication. It was signed by almost every nation Q. 6. Is the Washington Convention binding upon the United States? A. 6. Yes, the United States ratified the Con- vention, and in this country it has the power of law Q. 7. What is the Federal Radio Commission? A The Federal Radio Commission is the regulating and licensing authority on matters dealing with radio communication in the United States. It is composed of five commissioners ap- pointed by the President. Among its duties they: a) classify radio stations; (b) prescribe the nature and service to be rendered; (c) assign bands of frequencies or wavelengths; (d) deter- mine the power, operating hours and location, of each class of station. It is the Federal Radio Commission which issues station licenses. Op- erator’s licenses, however, are issued by the Department of Commerce. (. 8. What are the rules and regulations re- garding the secrecy of radiograms? A. 8. See Section 27 of the Radio Act of 1927. Briefly, the contents or meaning of an addressed message must not be divulged to other than the addressee or his agent, except. te an authorized communication channel or upon the demand of a competent court; nor may a message be inter- cepted and divulged even to the addressee with- out the authority of the sender; nor may any ~I ~J

Page 34

information in an addressed own benefit. The law does not per e m< is aD] rmation which has been broadcast penalties may be imposed for vi idio laws and regulations? lating any provision of the Radio Act punishment may be by fine not e) 100 or imprisonment not exceeding fiv r both. For violating or failing to obser rule contained in any international tr y the United States, or made by ithority, the punishment is made fine of not more than $500 for addition, an operator who or regulation, wilfully damages its superfluous signals or pro- ne language, or wilfully or mali- may have his license suspended to exceed two vears arr ner lass of radiograms holds preced- ers I crams relative to distress calls ver all other classes of radio- is the law regarding the trans- ! ent communications” ill knowingly transmit any signal of distress, or communi- ereto re the international regulations re maintenance of constant tre- ( rity of signals? ves emitted must be as constant is free from harmonics as the st will permit he meaning of the following sig? Q, QRT he international distress signal eral call to all stations and has ty be used as a signal of inquiry communicate with any station wit n which case the signal is termi- r e letter K, or as a preface to br vhich no reply is expected. In the lat terminating letter K is omitted stop sending.” t is the law regarding the amount of Mm | to communicate over a given nimum power required to insure unication should be used at all ( t is the distress signal for radio- from the French pronun- ciat er’ meaning ‘“‘help me.” Q t sigrial denotes the end of a mes- ( rnal denotes the conclusion of cor between two stations?

Ost

A. 17. ---—- _— Q. 18. What does the letter K mean at the end of a transmission? A. 18. It is the invitation to transmit meaning in effect, ‘‘go ahead.”’ Q. 19. What persons may stations? A. 19. Only holders of radio operator's li- censes issued by the Department of Commerce are permitted to operate amateur stations (). 20. What are the restrictions placed upon amateur stations regarding the transmission of news, music, lectures, or any form of entertain- ment? {. 20. Amateur stations are not authorized to broadcast news, music, lectures, or any form of operate amateur entertainment Q. 21. What communication between amateur stations and are the regulations concerning government or commercial stations? A. 21. Amateur stations are not permitted to communicate with commercial or government stations unless authorized by the licensing au- thorities except in emergency or for testing purposes. This restriction does not apply to communication with pleasure craft such as yachts or motor boats which may have difficulty in establishing communication with commercial or government stations Q. 22. What frequencies are amateurs by the International Radiotelegraph Convention which met at Washington, D. C. in 1927? A. 22. The following made available to amateur stations 1715 ke. to 3500 ke. to 7000 ke. to 14,000 ke. to 28,000 ke. to 30,000 ke. 56,000 ke. to 60,000 ke. 100,000 ke. to 401,000 ke. assigned to frequency bands are 2000 ke. 4000 ke. 7300 ke. 14,400 ke. Q. 23. What frequencies may the amateur use for radiotelephony? A. 23. The following frequency bands may be used for amateur radiotelephony 2000 ke. 3550 ke. 60,000 ke. 1715 ke. to 3500 ke. to 56,000 ke. to In addition, specially qualified amateurs may obtain permission to operate, phone transmitters in the band between 14,100 ke. and 14,300 ke. Q. 24 What frequency bands are assigned exclusively to amateurs? A. 24. The following frequency bands are as- signed exclusively to amateurs by international agreement : 7300 ke. 14,400 ke. 7000 ke. to 14,000 ke. to JANUARY, 1930

_— —- «2. be m ar co of al pr wh oth

Page 35

as- onal

JANUARY, 1930 Q. 25. What amateur bands are shared, and with whom? A. 25. The 1715-ke. to 2000-ke. and the 3500- ke. to 4000-ke. bands are internationally as- signed as shared between fixed service, mobile service, and amateurs. In the United States these bands are assigned only to amateurs except for limited use of the 3500-ke. band by off-shore Naval aircraft. The 28,000-ke. and the 56,000-ke. bands are available for experimental as well as amateur uses. Q. 26. What vessels of the United States are obliged by law to carry radio equipment? A. 26. The following is quoted from the Wire- less Ship Act of July 23, 1912: **. from and after October 1, 1912, it shall be unlawful for any steamer of the United States or of any foreign country navigating the oceans or the Great Lakes and licensed to carry, or carrying, 50 or more persons, including passengers or crew or both, to leave or attempt to leave any port of the United States unless such steamer shall be equipped with efficient apparatus for radio communica- tion, in good working order, capable of trans- mitting and receiving messages over a distance of at least 100 miles day or night.” Q. 27. What is the SOS frequency? A. 27. 500 ke. (600 meters). Q. 28. What is the priority of various classes of radio communication? A. 28. (1) Distress calls and communications relating thereto. 2) Communications preceded by the urgent signal (XXX 3) Communications preceded by the safety signal (‘1'T"] +) Communications relative to radio-compass bearings. 5) Government radio telegrams. 6) Radiotelegrams relating to the navigation, movement, are requirements of ships, the safety and regularity of air-services, and radiotelegrams containing weather observations destined to an official meteorological service. 7) Service radiotelegrams relative to the oper- ation of the radio service or to the radio telegrams previously exchanged. 8) Public correspondence radiograms. Q. 20. What is meant by “superfluous sig- nals? A. 29. Superfluous signals are those which are hot necessary in carrying out radio correspond- ence; their use is forbidden. Q. 30. What are the international regulations relative to the exchange of communications be- tween amateur stations of different countries? \. 30. Such exchange is forbidden in cases where either country gives notice of its opposition » to such communications between amateurs; otherwise it is permitted. Except where interested

OST 37

governments have made special agreements be- tween themselves however, ‘‘the communica- tions must be carried on in plain language and must be limited to messages bearing upon the experiments and to remarks of a private nature.” It is highly desirable that every prospective amateur become familiar with the provisions of the Washington Convention, the Act of 1927 regulating communication in the United States, and the regulations of the Federal Radio Commis- sion and the Radio Division of the Department of Commerce.. Much of this information has ap- peared in QST and the *‘ Radio Amateur’s Hand- book.” Technical Information Service Rules Please observe the following rules when writing the Technical Information Service: 1. Before writing, consult the Radio Amateur’s Handbook and your files of QST. Nine times out of ten you will be able to find the answer in QST or the Handbook. 2. If reference is made to the Handbook, men- tion the page and the edition to which you refer. If reference is made to QST, mention the page and issue you have in mind. 3. Number the questions and make a separate paragraph for each question. Make the questions as brief and as direct as possible. 1. Give as much information concerning the operation of your set as possible so we can at least guess where the trouble might be. Don’t simply tell us: ‘‘ My set won't work — what’s the matter with it?” 5. Write on one side of the paper only, and use a typewriter if possible. 6. Make diagrams on separate sheets of paper and fasten them to your letter with a pin or paper clip. All diagrams should be schematic — do not send pictorial diagrams. 7. Print your name and address in full on each sheet of paper. A return address on the envelope is not sufficient, as the envelope is destroyed by the office manager as soon as the letter is opened. S. Keep an exact copy of your questions and diagrams, and mention that you have done so. 9. Do not ask for opinions on, or comparisons of, business concerns or their products 10. Enclose postage for the reply but do not send an envelope. It is much more convenient for us to use our own envelopes with our stationery. 11. Address all questions to the Technical In- formation Service, American Radio Relay League, 1711 Park St., Hartford, Conn. Any back copies of QST to which we refer you may be obtained from our Circulation Depart- ment for twenty-five cents each.)

Page 36

Directors serve for two-year terms. terms of half of them expire in odd- bered vears, of the other half in numbered years. This fall elec- tior 1 in six of our divisions in the 1 in the Canadian Section, to for the 1930-1931 term. Some chat ir in our Board. The results were D WITHOUT BALLOTING provide that if there is but one elig in an election area, he shall be de ted without balloting by the mem- ber us the case in several of the elec- Mr. A. H. Keith Russell, for Canadian General Manager, re] to our great regret decided not to stal tion to the Board. Two other nal n nomination, Mr. Alex. Reid, VI Lambert, P. Q., and Mr. Alphy Blai rd Mines, P. Q. Mr. Blais with- dr nd Mr. Reid, as the only other nor lared the new Canadian General Mar office January Ist \ been a licensed amateur since for the Province of (Juebec sil sa past president of the Montreal ar udio Club. As he was Mr. Russell's is successor, Canadian amateurs ’ ‘ I n is qualifications The incumbent, Prof. Ek. C received four nominating filed for anyone else. This \tlantie Division unanimous ‘Doe” has been declared \\ \ ‘ MP, ir und Prof. C. M. Jansky, Jr., for mar Dakota director, has recently re- nN that division and made himself iT r reélection. But one name was np] nation, that of Mr. Cy. L_ Barker, VW nning, Minn., who therefore now su lansky. Mr. Barker is an old-time ar vell-known on the air, an O.R.S., 3.C_M. for Northern Minnesota In this election the only nom- inat received before the legal closing hour ed by our by-laws was for Mr M. |} iB, of Oakdale, La. Petitions were als r the incumbent, Mr. Benjamin attanooga, for Mr. Bradford , and for Mr. R. B. Somer- H —— but they all arrived after the could not be considered. Mr. Ost A.R.R.L. Election Results Some Changes on Our Board of Directors JANUARY, 1930 Hill therefore succeeds Mr. Painter, effective the first of the year. He is the head cf the science de- partment in the Oakdale High School and for some time past has been the A.R.R.L. S.C.M. for Louisiana. RESULTS OF BALLOTING In the other three divisions in which elections occurred there was more than one candidate, so that the choice was made by balloting by the membership of the division. The results: Midwest Division. In this division Mr. Louis R Huber, W9DOA of lowa City, lowa, won over Mr John H. Amis, WOCTET of ‘Topeka, \ans., by 340 votes to 113. Thus Mr. Tuber succeeds Mr Porter H. Quinby, long-time Midwest director, who felt obliged by business pressure to retire from our Board Mr. Huber, a student lowa, has been very active in A.R.R.L. affairs in An O.R.S., he was 8.C.M. for lowa \.R.R.L. work in the but is probably best at the University of recent vears in 1924 and did valiant days of the “ Inkslingers”’ known for the year which he recently spent at the Hartford headquarters as Assistant to the Communications Manager Pacific Division. In this division it would ap- pear that Mr Allen H. Babeock, W6ZD, of Berkeley will be returned over his two Ooppo- nents, Dr. J. E. Waters, W6hC, of Anaheim, Calif.. and Mr. M. BE. MeCreery, W6LJ, Los Angeles, the count at the end of the official voting period being 470 for Mr. Babcock, ISS for Dr Waters, and 58 for Mr. MeCreery. The Executive Commitee of the League, however, in view of 4 protest from Philippine members that they have not had time to cast their votes due to the dis- tances involved, has declared that the Pacific elections will be regarded as incomplete pending receipt of Hawaiian votes up to noon of December 15, 1929, and of Philippine votes up to noon ol February 15, 1930, at which time the final count will be made. Southeastern Division. In there were three candidates: the incumbent, Mr Harry F. Dobbs, W4ZA of Atlanta; Mr. Forrest W. Dana, W4AGR of West Palm Beach, Florida, and Mr. Charles W. Davis, W4PM, Atlanta. The count: Mr. Dobbs, 73; Mr. Dana, 49; Mr. Davis, 11. Thus Mr. Dobbs, who has represented the Southeastern Division on the A.R.R.L. Board for the past six years, is now returned for an addi- this division also tional two years QST welcomes the new directors and hopes soon to be able to present more interesting sketches (Continued on page 9V) an

Page 37

130 the de- for for ions *, SO the sR Mr 340 Mr ctor, etire y of rs in lowa the best t the the | ap- )», of |p po- 1eim, Los ting - Dr utive of a have » dis- acific ding mber on of “ount also , Mr yrrest yrida, The a Vis, 1 the rd for addi- ; s00D tches JanuaRY, 1930 OST Plate Supply Filters and Keying By J. C. Coe* HERE are a number of factors effecting the stability of the signal emitted from 2 single tube short-wave transmitter operating from the standard 110-volt. 60-cyele power supply. A filter system may look fine on paper, and surely capable of delivering practically pure d.c., but just try keying it once. No matter how carefully the oscillator may be constructed and adjusted the signal may sound “chirpy,”’ or the dashes may have long “tails”’ if the filter is not right. High voltage surges may eause the tank condenser shunting the plate coil to break down when the key is closed or opened or both. At least they may cause bad key clicks. The method of keying and the filter used are of great importance, and are interlocked. The man- ner in which a given set of chokes and condensers is arranged effects not only the note as far as smoothing action is concerned, but also its stead- iness, and to a large extent the value of the rec- tified voltage available to the plate. It is the writer's conviction that in the filter lies the root of much evil Different types of oscillator circuits were used so the following remarks are intended to be gen- eral, applying to any oscillator circuit, and the conclusions reached are the result of consider- able experimenting, the results of which were in- corporated in two types of transmitters built by the Signal Corps, the &-TR-3, using one or two 50-watt tubes in parallel, and the S-TR-4 using a single 250-watt tube. The wavelengths covered are from 32 to 75 meters, depending upon the coils used. No attempt was made to obtain a ‘pure’’ d.c. note, but one steady and sufficiently smooth for the purpose was the result. Govern- ment business has heen handled over a number of each type of set for a considerable period of time, and each has required but very little at- tention. In each ease two UX-S66 rectifier tubes were used. Although the inverse peak plate voltage in the 8-TR-4 is a little more than the 5000 volts specified, tube life has been excellent. Fig. 1 shows the filter adopted, and this, in the opinion of the writer, is the minimum upon which the amateur should build. Another section might well he added. For the 50-watt tubes. C and C, .6 wfd. For the 250-watt tube, C,; was 5 ufd. and C. .5 ufd. with a 30-henrv choke be- tween in each ease. The reason for the different values of capacity will be covered in the latter paragraphs of this article. Both types of sets were was 2 ufd. Engineer, Signal Corps, Box 151, uston, Texas * Assistant Radi Fort Sam H wired to be keyed in the primary of the power transformer. KEYING Keying in the grid was found to be least de- sirable especially with the 250-watt tubes, be- cause of the high surge potentials appearing across the tank condenser. If the plate supply is 2000 volts pure d.c. and the grid potential is 350 volts below the filament during oscillation, with the key up this value of grid bias will be- 0-500 mA L REC aat——{ }- : 2 | | = = oa mn | Ree hee > maNTYY? qreekerere) FIG.1 THOTT = a come much greater, thereby blocking oscillations. In other words, the grid potential is 2350 volts below that of the plate while oscillations are tak- ing place, but when the tube is inoperative this necessarily becomes a much higher value. In fact, the grid may assume such a high negative potential that conduction manages to take place by leakage, thereby momentarily re- ducing the grid potential. This is accompanied by a slight rise in plate current. This process re- peats itself. In some instances the plate current rises and falls so slowly that the pulsations may be counted, and again they may occur as fre- quently as 100 times per second. In any event this is the cause of considerable noise, because the plate current each time reaches a sufficiently high value for oscillations of a sort to take place. A resistance placed across the key is the only means some of preventing this, but then a weak signal is sent out continuously, which is not desirable. The above mentioned fluctuations in plate current with the kev up cannot occur with the key in the center tap, as in Fig. 2, because both plate and grid circuits are broken. SURGES With grid or center tap keving, the full plate voltage is always upon the plate of the tubes In

Page 38

vy is opened this voltage may in- 1007 (2000— LS00)2 Leeeeree saad Fil OTONINTNTAA) ly. With keying, the plate volt- one high value to a higher er condenser must discharge to which its voltage is lowered depressed, and must assume an as the voltage builds up when 1. If the voltage across a l-yfd. between 2000 and 1800, then released or taken on when the rises again. The figure, .02, is formula: » energy in joules. capacity in farads. higher voltage. lower voltage. ppear to be much energy, but total energy stored in an induc- ries carrying 63 milliamperes as e formula: 0(.063 )2 or Wn eT 02 » energy in joules, iductance in henries. urrent in amperes. the current in the inductance nergy transfers take place on ik, each causing a considerable Trans —4 tem. Thump filters are of consid- ing these effects. primary of the transformer sup- power subjects the system less to e voltage on the output side of OST JANUARY, 1930 the filter rises gradually, comparatively speaking, since the current must build up in the trans- former windings, and the inductance of the wind- ings retards the rate of increase. Much of this initial inflow of energy is used to charge the various condensers of the system, and as they be- come charged there is a greater proportion avail- able to the tube, all of which tends to give a more gradual rise in oscillations than in the methods previously discussed. On the instant of breaking the primary circuit all the energy stored in the filter units must be dissipated. Since the rectifier tubes will not pass inverse currents unless subjected to enormous potentials, the stored energy must spend itself otherwise, as in driving plate current through the tube. If C, and C2, Fig. 1, are each 2 ufd. and a 12-henry choke is used, there will be a total of 8 joules stored in the condensers at 2000 volts, and only .24 joules will be stored in the choke coil at 200 mils. The result is that current will flow in the plate circuit for a considerable period of time after the contacts have opened, and cur- rent has ceased to flow in the transformer wind- ings. The signal will be decidedly chirpy, and the dashes will have long tails. Even with C, reduced to .5 ufd. there is some fluctuation noticeable at 2000 volts. but at LOOO volts the note is steady. The reason is that at 1000 volts a given condenser can store only one-fourth as much energy as at 2000 volts. A .5-ufd. condenser will store just as much energy at 2000 volts as a 2-ufd. condenser at 1000 volts. The use of a resistance across the high voltage in order to absorb surplus energy was not found practicable as it must consume al- together too much current to be of any help, and it is objectionable because of the drop this addi- tional current causes in the series choke coil. A larger choke coil was found desirable since its energy storage is more nearly comparable to that stored in the condensers. Furthermore, if C, is too large the rectifier tubes may be overloaded: d.c. milliammeter placed in the plate circuit of a rectifier tube will indicate the average cur- rent over the entire cycle, so this must be consid- ered in determining the peak value during the conducting period. FILTER REGULATION In many filters the variation in voltage across the plate from no load to full load (when keying in the grid or in the center tap) is very large. Regardless of the method of keying used, an im- proper arrangement of filter units results in a rather low d.c. voltage available to the tube. Many times this is blamed on the ohmic resistance of the choke coils; it is often only a minor cause. (Continued on paqe ' This is particularly important connection with the use of mercury-vapor type rectifier tubes since the initial surge into a large filter condenser connected across the recti- fier output may cause the peak current rating of the tubes to be exceeded tral is ( is ( Wi W9 regu con Star abil; for 1

Page 39

iz, 1S- d- Lis he ye- il- re M ls uit be ASS us elf igh nd ser the rgy al- and idi- its hat led! cuit cur- sid- the TOSS ving rge. im- in a ube. ance puse. JANUARY, 1930 OST Official Frequency System HE Official Frequency Station Com- mittee, a part of the Experimenters’ Section of the A.R.R.L., has arranged the services described below for the benefit of the members of the League and others who may wish to use them. 1. Standard Frequency Transmissions are sent by the Standard Frequency Stations (known as O.F.S.-S.F.) on definite schedules with a high degree of accuracy. All the principal amateur bands are covered, several points being given in each so that frequency meters may be accurately calibrated. piezo-electric frequency standards that are regu- larly checked by one or more of the leading scien- tific laboratories of the country 2. Official Frequency Transmissions are sent by Official Frequency Stations (known as O.F.S at a somewhat lesser degree of accuracy. These stations do not transmit on regular schedules but announce their frequency at the end of at least every other transmission during their regular amateur operation. Such stations will measure the frequency of your transmission upon request These transmissions are based on Practical suggestions are always welcome and should be sent to the proper member of the Committee which is composed of the following: Don C. Wallace, WG6AM, Chairman in charge of O.F.S., Room 410, 209 Pine Ave., Long Beach, Calif.; Prof. C. M. Jansky, Jr., care of University of Minnesota, Minneapolis, Minn.; and Killian V. R. Lansingh, W6QX, in charge of O.F.S.-8.F., Box 666, Hollywood, Calif STANDARD FREQUENCY SCHEDULES Friday Evening Schedule Friday and Sunday After Schedule Time Frequei v. kK lime frequen y, Ae p.m A B AB p.m BB ( Cb 8:00 300 «7000 = 7000 £:00 7000 14,000 28,000 8:12 3550 7100 7100 | 4:12 7100 14,100 29,000 §:24 3600 7200 7200 24 7200 14,200 30,000 8:36 3700 «37300 «7300 | 4:36 7300 14,300 14,000 8:48 S800 3500 1:48 14,400 14,200 9:00 3900 3650 5:00 14,400 9:12 1000 3850 9:24 1000 | The time is the local standard time at the transmitting station. 8:00 p.m. at WIXV-WIAX\V is 0100 G.C.T. and 8:00 p.m. at W9XL-W9WI1 is 0200 G.C.T. Similarly, 4:00 p.m. at WIXV- WIAXV is 2100 G.C.T. and 4:00 p.m. at W9XL-W9WI is 2200 G.C.T. Due to the new regulations of the Federal Radio Commission concerning experimental licensed stations, the Standard Frequency Stations will in all prob- ability use the amateur calls W1AXV and W9WI for these schedules. DATES OF TRANSMISSION D Sched ule Station Dec. 6, Friday \ WIAX\ * 8, Sunda CD WoWI 13, Friday BB WIAX\ 13, Friday AB wow! 20, Friday B WIAXV 27, Friday AB Wowl 29, Sunday Cc WIAXV Jan. 3, Friday \ WIAXV (WI1XV) >, Sunday cD wow! (W9XL) 10, Friday BB WIAXV 10, Friday AB Wow! 17, Friday B WIAXV 24, Friday AB WowI! 26, Sunday Cc WiAXY $1, Friday \ WIAXV Feb. 2, Sunday cD Wow! ‘ 7, Friday BB WIAXV 7, Friday AB Wow! 14, Friday B WIAXV 21, Friday AB Wow! 23 Sunday Cc WIAXV Schedule **4B” sent at 2100 G.C.T. on one Kriday of each month is transmitted at that hour for the particular benefit of Kuropean sta- tions. If sufficient reports on its reception are not received, it will be discontinued. THE STATIONS WIXV-WLAXV: Massachusetts Institute of Technology, Communications Department Ex- periment Station, Round Hill, Dartmouth, Mass., H. A. Chinn in charge. Uses Eastern Standard Time and characteristic letter ‘‘G.”’ W9XL-W9WI: Gold Medal Station, R. F. D. No. 3, Anoka, Minn., H. 8S. McCartney in charge, Lyall K. Smith, Ivan H. Anderson and George Collier. Uses Central Standard Time and characteristic letter ** D.” assisted by DIVISION OF TIME A total of 12 minutes is allotted to each trans- mission divided as follows: t minutes — QST QST QST de (call letters) 3 minutes — Characteristic letter (“G” or “PD”’) sent very slowly and broken by call letters each half minute | minute — Statement of frequency in kilo- cycles to nearest integral figure. t minutes — Time allowed to change to next irequency ACCURACY The transmissions of both stations will be within 1/10 of 1°¢ of the frequencies herein an- nounced, which is considerably better than the accuracy to which the average good amateur frequency meter can be calibrated and main-

Page 40

OST W9BAG

Description Contest is over, and the publish descriptions of modern amateu riptions was received the last few days of the contest and some of these results of the contest are reported elsewhere in this issue r stations as the proper material and space permit. A great war in early JANUARY, 1930

tion of Frank Smolek, W9BAG, 1452 S. Troy St., Chicago, like many tations, started back in the dark when synchronous spark gaps and the latest word in station equip- n't so much interested in the the present and future, and while THE TRANSMITTE} Before attempting the construction of the completed panel assembly shown in the general view of the station, the equipment was gradually built up from a low power outfit to its present size in “bread board”’ fashion. This was done to make absolutely certain that results would be

t *NPER — High V.itage_ J oe << a } . bi Tr = ] Secupelien

ene.

} | = ' — '

\ }

GENERAL VIEW OF W9BAG tler may be seen at the left, the monit and the ype of equipment has been which developed from year ninate the intermediate steps description of the present indicate at onee that the ranged and suitable for either or experimental work. The station does not indicate the that are made in the station, observed from the schematic Che station is a modern one in rystal controlled, uses the Heising system of lio telephony, has both an requeney meter and a hetero- ble for checking the quality and, finally, has a mighty to complete the station equip- 0 per cent” or under the clock. the absorption typ frequency superheterodyne receirer at the right gratifving when the final transmitter was as- sembled. Every item within the transmitter has been arranged to give not only the essential technical details for 1929 operation, but to provide neatness of apparatus as well. WOBAG is entirely crystal controlled, not only to have an absolutely steady signal but also to construct a transmitter which would operate satisfactorily in the phone band. It was believed that a transmitter constructed to give the essentials for a real phone signal such as a d.e plate supply, good frequency control and high percentage of modulation, would work very well when used for telegraphy in the re- spective e.w. bands. The transmitter uses a completely shielded 210 crystal oscillator. The tuning of the oscillator is controlled by the lowest center dial on the upper panel as may be seen in the photograph. Plate current is indicated by the milliammeter

Page 41

130 the eral ally sent e to i be heen ical ness vstal ady hich and. d to such itrol vork . Te Ided ator the aph. eter JANUARY, 1930 directly to the left of this control. A neutralized 210 buffer stage operated as a Class B! amplifier acts not only as a radio frequency amplifier, but also affords exceptionally good frequency control +1000¥V te Henry 250 mi/ 14000 OhMS a 4 we 200 voos OST 43 the ‘phone band a crystal with the frequency of 3521 ke. is used. Operation throughout is on the fundamental. For 7000-ke. operation a 3560-ke. crystal is used in the oscillator and the buffer +300v. ulated for radio telephony. The 210 buffer stage feeds the 50-watt Western Electric final amplifier. “”y L, “HV he 1OVAC 250V TV AC 20Vv 2VAC. -22)av Cpse FIG. 1. TRANSMITTER AT W9BAG when the 50-watt final amplifier is being mod- acts as a frequency doubler. For 14,000-ke. operation the final amplifier is again doubled. For ‘phone work a Federal hand microphone + $ Sra 2 x | rey Rectobu/bs | WOWAL ac ane ) 1S00% | ; | |) 300 Mi/ Chokes Jon 30n 30h ov Amp ANOMmIO Ss ac FILS. = RL (Ya sta _ Oscillator Prate Clarostiats +300¥ 30h 30or (1A SA tuk”. Plate re ewes ead Fett Jap AB ™ ”m, | oan 4T1-A Neg Bias . 4 ~as = Buffer Bias ---.4 frost Pot lo > ——__— 4 100,000 Amp Bas ams Pots ~250Vv = FIG 2 This stage is neutralized and operates as a Class C amplifier. The 50-watt amplifier in turn feeds the antenna and counterpoise. For operation in Vacuum tube Amplifier Definitions” Dart and Atwater, page 29, September, 1929, QST. See by HH ‘ Modulator Bas . ~/0o0V ~ “ COMPLETE POWER SUPPLY AT W9SBAG is used in conjunction with a Silver-Marshall microphone transformer. This actuates a 171-A first stage amplifier. The 171-A feeds the 210 intermediate speech amplifier which in turn feeds the 50-watt modulator. The Western Electric

Page 42

modulates the final amplifier. tage of modulation is obtained he double choke and a voltage which allows the power ampli- OST JANUARY, 1930 microphone transformer input and grid _ bias on the second speech amplifier stage The lower panel contains the line voltage meter, a 2000-volt d.c. voltmeter and a 0-15-volt REAR VIEW OF RECEIVER | at W9BAG is a co f QUST. Need more be said? lower voltage than the is incorporated in the audio h amplifier in that the cores transiormers were especially igh impedance choke coil with ore was rebuilt by removing minations and substituting lo match the impedance of th vas necessary to interlace the ate chokes and to butt the okes. This system of amplifica- give excellent reproduction reported as being undistorted lulated a report which was heck with the monitor. 1 in the center of the upper ffer plate current. The dial ontrols the frequency of the meter at the upper left indi- of the final amplifier. The controls adjusts a double- ondenser which controls the | amplifier stage. The meter hand corner shows antenna isted by the condenser con- it. The two small knobs off the right are neutralizing con- the oscillator and buffer and and final amplifier. The two the right of the center regulate py of the superheterodyne receiver described in the March, a.c. meter which measures filament voltage on the 50-watt tubes. Two Bradley Radiostats located in the center, regulate filament voltag on the 50 watters and control the primary of the plate voltage transformer. The switches at the bottom control the line input, the modulator and speech amplifier (which are turned off for c.w operation) and the filament supply of the Recto- bulbs which naturally are heated before plat voltage is applied. The upper shelf contains all the audio and high frequency parts of the trans mitter, such as shielded crystal oscillator, mod- ulator chokes, buffer stage, neutralizing condens- ers, final amplifier inductance, final amplifier tuning condenser, antenna tuning condenser, impedance chokes, crystal oscillator bias battery and the various plate resistors. A careful study was given to the matter of frequency change when the station was being designed. As a result, a system was incorporated which allows operation in practically every band. The oscillator coil is interchangeable. The 3500-ke. coil is made of 12 turns, while the 7000- ke. coil consists of 7 turns. The buffer and final amplifier inductance are the REL type for 3500-ke. and 7000-ke. work. For 14,000-ke. opera- tion the 3500-ke. coil is used in the oscillator, a 7000-ke. REL inductance in the buffer and a 4-turn home made coil in the final amplifier. For 7000-ke. operation it was found necessary to neutralize the final amplifier and buffer stage. to | mo tab Stat

Page 43

30 las age olt ' OD tats | age the the and cC.W C1O- late s all ans nod- ens ifier ser, tery r of cing ated very The 000- final for eTa- wr, a id a fier. *y 10 age. January, 1930 However, for 14,000-ke. operation, neutralizing was not required. The fact that grid leads of the rf. stage were made extremely short, enabled the circuit to be neutralized very easily and no trouble was experienced in this respect. CHECKING THE SIGNAL Inasmuch as crystal control is used at W9BAG at all times, variation of frequency was practically eliminated. Nevertheless a home made monitor —— REAR VIEW OF THE TRANSMITTER The several rectifier and filter systems may be seen in the boltom sectior The middle shelf contains the crystal oscil- tor, intermediate amplifier, speech amplifier, filament trans- former nel nee choke The top shelf contains the final 50 watt amplifier. 50 watt modulator and amplifier and antenna tuning equepment is used to check the note of the transmitter and also to check the quality of modulation when ‘phone is used. The monitor is identically the same as described in a recent issue of GST, with the exception of the tickler coil which is adjust- able, thereby controlling rengeration so that oscillation may be stopped when checking the ‘phone. The use of a regeneration control on monitors is well worth while but does not seem to be appreciated by the average amateur. A tru idea of what the emitted signal sounds like can only be obtained when the monitor is barely oscillating ; i persistent oscillator ts of little use. An absorption type frequency meter is used to check the frequency when the transmitter is hanged to operate in the various bands. The monitor and frequency meter may be seen on the table in the center of the photograph of the Station. OST THE POWER SUPPLY The bottom shelf of the transmitter contains the 2000-volt power supply, a separate 500-volt power supply and a 400-volt “C” bias power pack. The main power supply consists of a ten- volt filament transformer, two Rectobulbs in a full wave rectifier and a Thordarson center tapped plate transformer having 1500 volts on each side. The filter consists of three 2000-volt, 2-ufd. fixed condensers and three 30-henry filter chokes. The 500-volt supply is composed of two 281’s in a full wave rectifier with the usual 500- volt power transformer and filter. The “C”’ bias supply is composed of a high voltage transformer, a condenser bank of 20 ufds. and a Raytheon tube for rectification. ““C”’ bias variation is secured by the movable arm of a 100,000-ohm potentiometer directly across the output. Three potentiometers are used. They supply “C”’ bias for the buffer stage, the final amplifier, and the modulator tubes. “C”’ bias on the intermediate speech amplifier is obtained by the use of a dropping resistor through the negative filament return. Bias on the 171 is obtained through a section of the voltage divider on the 500-volt supply. The 500-volt unit delivers plate voltage to the 171 speech amplificr and the oscillator tubes. Voltage for the intermediate amplifier and buffer is ob- tained through dropping resistors from the main power supply. All checks made over the air and on the receiving end, indicate each power supply to give perfectly smooth d.c. with exceptionally good regulation. Many systems of keying were tried at W9BAG without a great deal of success. When using c.w., key-thumps appeared which bothered the neighbors badly no matter what frequency Wis used, or else the household broadcast receiver was completely blocked. All methods were dis- carded as being unsatisfactory until the one illus- trated in Fig. 2 was constructed. This proved to be very excellent inasmuch as a broadcast re- ceiver was not affected in the least when operated ten feet away from the transmitter. Naturally the neighbors ceased to complain. The key thump filter consists of a 1000-ohm resistor in series with a 4-nfd. condenser directly across the contact of the keying relay, and a series inductance of 1% henrys shunted by a 14-y»fd. condenser between the relay and the return to ground. THE ANTENNA After several years of experimenting with every known type of antenna, including the current- and voltage-feed systems, it was finally decided to use an antenna and counterpoise for 3500-ke. operation. A 2-inch cage is suspended 45 feet above the ground between two steel masts. The antenna is one continuous cage direct to the lead- in insulator. Acrial and counterpoise are each 70 feet in length which allows operation on the fundamental frequency.

Page 44

operation a single wire voltage fed d, the feeder being connected directly oO plifier plate inductance. Operating the ur double frequency enables the 14,000- be used for communication. K THE RECEIVER t-wave receivers have been built and the introduction of high frequency

OST

JANUARY, 1930

any greater than that found in the usual re ceiver. With only a 112-A detector and 171-A first audio amplifier, volume is unusually good, The results produced by this receiver more than warranted the original cost. Batteries for the operation of the set are located under the operating table. A Tungar bulb charges the “‘A”’ battery as well as the Edison “B”’ batteries.

hen the March issue of QST ap- ided to build the superhetero- ribed in that issue. The photo- receiver almost identical with that issue. Fig. 3 shows the circuit. tained with this receiver have | that it was not deemed neces- .dditions or improvements sug- ues of OST. The oscillator and ils are constructed from the data 18 of the March issue; therefore described here. aerial, DX ‘phone and ec.w. opied anywhere in the room on Che volume is at least five to tained with the ordinary short- eceiver, but the amazing factor vel at that signal volume is not

’ 1ST DET. 1ST. LF 2N0. IF. 2N0.0€ET. AUDIO i = be Out- os as put Lt a" = 2 — L,¢ = | | c Rec 00000) AH °c‘ ral _ ry tet = Ic 6 “A +A *-C +45 +67, «++90 +135 “8 +c FIG — THE RECEIVER USED AT W9BAG late midget condenser Ci },000-pyfd. fixed condenser. tte National divided stator. Cn 100-ppfd. fized tuning condenser midget condenser. Ry j-meghom gridleak midget condenser. R2 6-megohm gridleak uufa. fixed condenser. Rs 2-.megohm gridleak -pass condenser. ‘a 50,000 ohm variable resistor ufd. by-pass condenser. Rs 15-ohm fized resistor fd. arid condenser. Re ohm rheostat P fired condenser. R; 100,000-ohm volume control t detector, oscillator and intermediate coils are constructed identically the same as listed in th f } 1€ fQs 7. r | of them were more or less un- A modulometer is in the process of construction so that the percentage of modulation can be ac- curately determined. This equipment is being built so that the operation of the *phone trans- mitter may be as accurately determined as the operation of the e.w. portion of the set, and to be in keeping with the recent changes and advances which have been made in the station. At the present time experimental work is nearly com- pleted and the station is ready for traffie and rag chewing. These activities have not been greatly indulged in during the summer as most of the time was spent in getting the station into shape for the winter evenings. Every item within the transmitter and power supply has been con- structed so that each part operates at about 50 per cent of its maximum rating, thus allowing 4 safety factor which gives consistent performance at a minimum upkeep.

—nf fos Se oo a FI Ly R,- T . hay que ate of |]

Page 45

1930 J Te- 71-A 700d, than are bulb dison iction ye at- being rans is the to be ances t the com- id rag reatly nf the shape n the con- ut 50 ying & nance January, 1930 OST 47 Experimenters’ Section AN A.C. RECEIVER HE prime reason for recommending the use of the UY-224 and UY-227 tubes in high frequency receivers as was done in the Experimenters’ Section of the Octo- ber and December issues of QS7' was because of their high gain and freedom from microphonic noises. Moreover, it was suspected that the in- directly heated tubes could be operated with an alternating current heater supply with more or less success as was hinted in this department last month The fact that high-frequency receivers operated entirely from the 1 10-volt, 60-cycle light socket are practicable and practical is substantiated in “A.C. High-Frequency Receivers” in this issue. But we RFC =] 0 STOOD 4] ¢ 8- 6 a + ba Sv 35Vv FIG. 1. A HIGH-FREQUENCY RECEIVER WITH A.C. FILAMENT SUPPLY Ij — 33 turns on 1 \o-inch tube for 3500-k« 15 turns on 14-inch tube for 7OO0-k« 6 turns on 1 \g-inch tube for 1 WO-ke Ig— 10 turns on 1'4-inch tube for 3500-k 6 turns on 14-inch tube for 7O000-h« 5 turns on 14-inch tube for 14 ,000-k¢ Ia— Antenna co ipling coil Vidget tuning conde? C:— 100-pyfd. midget regeneration condenser. Ci— 60-ppfd C— 100-pyufd. grid condenser. (—0 i-pfd by-pass condenser. ( t— 6,000-pyfd. 250-volt fixed condenser Cs— 2,000 ppfd Ri — 2-megohm grid leak. Rs — 100,000-ohm regeneration control Rs— 30,000 ohms. (A resistor of 100,000 ohms to 200,000 ohms, with plate voltage of 180 ll probably work out much better Editor.) Ri— 1- to 5-megohm grid leak. T— 2. )-volt center tapped jilan ent transjormer. have further evidence of the success of high-fre- quency receivers which have their heaters oper- ated from alternating current from W. F. Grogan, of Fort Myers, Fla., who writes: “I am enclosing a diagram of a new high-fre- quency set which I have built. | am so pleasea with its operation that I would like to pass the idea on to the rest of the fellows. “The set is the most gratifying I have ever operated and has plenty of volume. High-fre- quency ‘phones are received on a loud speaker with only two tubes. Moreover, the set is cheap to construct and not difficult to get operating properly. The circuit is shown in Fig. 1. ‘‘T have been using this receiver for more than a month now and can hear VE stations (tele- graph) about 9 p.m., QSA4 while the sixth district stations come in with good volume at 7:30 p.m. Ordinarily it is 10 p.m. before the 6’s come in on the 7000-ke. band. “The circuit can be made still better by adding a stage of tuned radio frequency amplification using a UY-224 and another screen grid tube in the audio amplifier. The regeneration is very easy to control and no hum can be observed when us- ing the headset The circuit of Fig. 1 shows a variable resistor in the screen grid circuit for controlling regeneration as wellasathrottlecondenserregeneration control. It is doubtful if both of these controls are required although in a particular receiver both may be use- ful. The negative side of the ‘‘B”’ battery is not shown grounded in Mr. Grogan’s receiver but it might be advantageous to connect the rotor of the tuning condenser, the cathodes, and the negative side of the plate battery to ground to reduce body capacity effects and to reduce the possibility of hum which might be present with some tubes. The use of a UY-224 detector tube provides an excellent means of obtaining ‘“‘peaked’’ audio amplification by substituting a tuned circuit in place of the resistor in the plate circuit of the de- tector tube. A NOVEL CRYSTAL MOUNTING The method of mounting a quartz plate for crystal controlled transmitters is sometimes a source of difficulty to the amateur. Good crystal mountings are expensive and the average amateur does not always have the mechanical facilities with which to construct a crystal holder of the de- sign he would like. An unusually interesting crystal holder, which should not cost the average amateur anything to speak of is suggested by F. W. Phillips, W1CRH. It is made of parts which are, no doubt, available from the junk boxes of most amateurs Fig. 2 shows the WI1CRH crystal holder. It is constructed from a watch case headset, and the method of construction is obvious from a glance at the figure. The metal watch case shells are easier to use if electrical connection is made from the lower brass plate to the binding post at the

Page 46

side hell. The erystal holder is dustproof and rly fitting the spring connection to the late the pressure may be varied, if FIG 2 st tightening the cap on the headset she ire that need be exercised with tl rvstal holder is to make sure that the sul brass plates which come in contact wit tal are perfectly flat ) ng of erystal holders we might mer t John has about the Reinartz ‘ rvstal holder we've ever laid our é r (ST are aware of the fact that Johr things the way another amateur rvstal mounting consists of two br th their faces ground flat. The between the two ground faces ssemblv is held together with a lexible wire soldered to each br ich is used to make contact with he circuit completes the ervstal certainly the simplest crystal run across in a long time and of apparatus is concerned much, IGH FREQUENCY ANTENNAS antennas for high frequency peared so frequently in QST that it there is little left to say nte nna-counterpoise SV stems, vire fed antennas and various uliating svstems have been ibed in this and other journals to construct a satisfactory ny type of location no matter W2FE sends in an idea which I:xperiments at W2FE have nd two-wire feeders on Hertz results obtained indicate that is as good as another when they tructed rought to the fact that the important point of accu- the length of the antenna. In the length is guessed at. As a makes little difference where lf-controlled oscillator amplifier many Ost JANUARY, 1930 transmitters are used, since the transmitter can be tuned to the exact frequency of the antenna for best results. However, where crystal controlled transmitters are used it is not possible to alter the frequency of the transmitter unless several erys- tals are available, and to obtain maximum radia- tion from the antenna the antenna must be of the proper length to resonate at the operating fre- quency. The proper method of determining the length of the antenna is given in the Handbook and has appeared in *‘The Zepp” (QST’ for September, 1928). In cutting the antenna to the proper length W2FE points out that the maximum length of the antenna is to be considered. Many amateurs measure the length of the antenna from the end of one insulator to the end of the next, but as the length of the wire used at the insulators is not figured into the antenna length, an error of a foot or more may creep into the antenna design. Failure to observe this rule may make the antenna as much as 50 or 60 kilocycles off resonance. 4 DELAYED TIME RELAY FOR THE TRANSMITTER The problem of properly putting the station in operation at the throw of a single switch with the knowledge that the filament of the transmitting tubes will be thoroughly heated before plate volt- age is applied is sometimes of interest to amateurs who construct their stations for maximum con- venience and comfort \ method of automatically applying the plate voltage to a transmitter several seconds after the ansmuttler mo) Y pee c To Negative Piate Supply UV-227 FIG. 3 oe filaments have been lighted is shown in Fig. 3 \ l Y-227 tube is connected in the manner shown Its heater is supplied from the power source oper- ating the oscillator or amplifier tube filaments Resistors are used to limit the current to 1.25 amperes for proper operation of the heater of the U Y-227 tube Because a ceramic insulating sleeve and the cathode must be heated before plate current be- gins to flow, the filaments of the transmitter are lighted about half a minute before the relay is closed and plate power is applied to the trans- mitter. Plate voltage is applied to the tubes as long as the filaments are kept lighted after the relay is once closed. The grid and plate of the UY-227 tube are connected together because the (Continued or page & de

Page 47

130 can . for lled the rys- dia- the ire- igth has ber, igth the eurs end ; the not foot ign. ‘nna TER yn in 1 the ting volt- eurs con- plate r the ig. 9 own oper- ents 1.25 f the | the it be- r are lav is rans- es as T the of the se the JANUARY, 1930 OST 49 Devoted to the interests and activities of the INTERNATIONAL AMATEUR RADIO UNION ent: H. P. Maxim Headqu Vice-Pres.: C ir H. STEWART Secretary: K. B. WARNER ters Society Tue AMERICAN Rapio Reiay Leacue, Hartford, Conn. MEMBER SOCIETIES American Radio Relay League Asociacion E. A. R Associazione Radiotecnica Italiana Canadian Section, A.R.R.L. Deutschen Amateur Sende und Empfangs Dienstes Experimenterende Danske Radioamatorer Nederlandsche imateurisme Vereeniging voor Internationaal Radio- 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 HERE is one ‘‘rotten”’ subject we hope The Old Man will write about some day It might be called ‘‘ Rotten Reading of QST.” To illustrate what we mean we will mention that about ten days after the Octo- ber issue of (ST came out (that was the issue that had the first set of DX time-tables) we got letters from two League members. One of them wanted to know why it was that QST never printed any information on when to look for foreign DX, and the other asked for some DX time schedules Well! We replied by suggesting that they read the OST they had just received. One of them re- plied to the effect he was glad to have it called to his attention, because he never read the I.A.R.U. Department, and the other had seen the tables, but didn’t believe they would work for him. He hadn't even given them a try! Now we wouldn't get all steamed up about these two cases if it weren't for the fact that they reflect a wide-spread condition. QST prints a description of a screen-grid receiver, and yet the Information Service continues to receive its usual requests for information on how to build one. In most of the cases it turns out that the seekers for information saw the receiver article but wanted assurance that it would work all right for them. Your compiler recently attended a radio club meeting and during his talk commented on the beautiful simplicity of the single-wire-fed Hertz antenna. At least a dozen of those present in- quired as to where they could get dope on this » A. L. Budlong system, in spite of the fact that the excellent article by Windom in the September issue had been out for a month. It was there for all to see. Most of the inquirers admitted they had noticed the article but ‘‘hadn't read it."’ We print a list of QSL bureaus in our own department of the ol’ magazine, and in spite of it continue to get the usual stream of requests for QSL bureau ad- dresses from League members. Practically all the applicants in each of the cases cited above state they read QST regularly. Yes they do — not! Tell it to the Marines! They glance at the cover, look in the C.D. to see if their traffic report got in, run down through ‘Calls Heard,” glance idly at the illustrations in the rest of the magazine, and call it a day We hope T.O.M. reads this and acts accord- ingly. In the meantime if somebody writes us ask- ing if we would please tell them what societies are members of the I.A.R.U., we are going to rush madly down Main Street and murder ourselves a couple of nice old ladies, or shoot a policeman, or something Just about this time we hear someone murmur- ing that when they turn to the [.A.R.U. depart- ment they want international news, and not bum sermons. Well, we suppose they're right The prefix for Philippine amateur calls has been changed from K to KA. This should help a lot in picking them out. Better make a note of it.

Page 48

rreat pleasure in presenting herewith ut we hope will be a steady series of f the presidents of I.A.R.U. member Veck, President of the Reseau Neck started his ham career in usual array of coherers and igni- re followed a period of experimenta- huge spark coils, crystal detectors, - —_ : ——EE ECK, PRESIDENT, RESEAU BELGE together with about thirty other he was instrumental in forming n amateur society. During the war experience in the ‘‘signal corps”’ of rmy, and also collected a consider- * German radio apparatus! This s a beginning for Mr. de Neck’s ifter the war mall group, of which Mr. de Neck led the Reseau Belge, which has have four hundred members. Mr ted the president a few years ago rrees in electrical and metallurgical is now associated with his rokerage business. There is a Mrs nd three junior operators. e station of the R.B.’s president, is \t present it consists of a 1929 push- rking into a Zepp on 14,000 and the usual receivers. It is difficult this rig will be in operation, how- he words of its owner, ‘“‘the sta- every month.” rds, Mr. de Neck is a real amateur very much to receive photo- biographical notes from the the other sections of the Union ne more DX time-tables. Just at more information than we can OST JANUARY, 1930 use in one issue, so some of it will be held over until February. This means that a few people who were told their material would appear in January are due some apologies. All contributions are very gratefully acknowledged, however, and wherever usable, will be printed. We are going to use all our space for this feature this month in printing a list submitted by Bruce Hoag, WSAXA, for the 14,000-ke. band (Eastern U. S.). We believe this list will be particularly approriate in view of the Communication De- partment international tests, because it gives definite call letters for stations in many of the fewer worked countries. The times, as usual, are GCT, with 0000 representing midnight. For E.8.T. subtract 5 hours, for C.S.T. subtract 6 hours, subtract 7 hours for M.S.T. and S hours for P.S.T. Some deviation from the exact times given must be expected for seasonal differences, of course. 14,000 ke Asia Iraq. 0100. yilmdz Syria. 0100. arSufm Europe \ustria. 0200-0400. uosx, uoxl Belgium. 2000-2200. on4uu, ete. (Czechoslovakia. 2300. okirv, oklfm Denmark. 2300-0000. 0z7jo, oz7zg Spain. 2300-0000. ear96, ear98, etc. France. 2000-0000. fSaja, ete. Great Britain. 2000-0000. g7ml, ete. Italy. 2300-0000. I1fp Jugoslavia. 0000 (but rarely heard). un7dd Germany. 2300. d4xn, d4vp, ete. Sweden. 2300. sm6ua Netherlands. 2200-0000. pb7, paOvn Portugal. 2100-0000. ctlbx, ctlby, ctlaa Finland. 1200-1400. oh7nb, oh2nm Poland. 2300. sp3pb Hungary. 2300. haf8b Africa Egypt. 0100. suSrs \lgeria. 2300. fm-ocup, fmSfva Tunisia. 2300. tun2 French Equatorial. 2300. fqSwb South Africa. 2000. zs4m, zutia. seasonal Cameroon. 2300. fqpm North America Alaska. 0400. k7mn, k7ady. seasonal Newfoundland. 2300. voSae Honduras. 2300 Jamaica. 1400-0000. nj2pa Mexico. 2300-0300. x9a Porto Rico. 2300. k4akv, k4kd Virgin Islands. 2300. k4aan Cuba. 2300. Costa Rica. 2300. ti2ea, ti2ags Panama. 0100-0300. rxlaa ‘anal Zone. 1200-0400 (Continued on page 60) ~ w9) kéd em. i2k wis wic wit wba wit whd whd whe wor vk3 ved! em2

Page 49

1930 over - who uary very rever ture sruce stern larly De- vives . the |, are lor uct 6 1Ours imes es, of dd a 1 January, 1930 Fred Aark nm, Vonterrey, \. | Apartado 101, Ve Tico wlapj wlasu wlaue wicjd wlepr wldl wlfe wlii wlip } > > wijr Weous wWweahd Wouja wlZakm w2alu w2amh w2aot wlase wlaun wlaxl wlbfi w2boz w2buy w2evf w2ex! > ) wlezz w2jn w2jo w2jv w3afn w3ahw w3aru w3avo w3aw!l wackl w3fq w3gz w3mv w3sz w3tb wizze wiaaq wiaaw wiabvy wa wiadb witae] wtaeq wiaha wiahz wiajb wiajh w4amx wd4anh witao w4bk wica witew widu w4jx wika wikh wikv winb winn winz witoi wiqq wirz wit wito wity wy - } woajl woaoz w5awd w5azs wSbat wSbbx wdbez w5bdj wivz woaar woaav woafx w5ahx woain wobtw wobtx wobhq wobhv w5es woh) w5jv w5i wopa wouj wor) wosw wovl wowf wioww wSoyw wo5zk wham woadw wbajp Wwhajr woajyw whannh whaov whara whawa wibam wtbdd wtbet wibfe wibef wibgo whbig w6bju woblx wibpm wtibpu wtibqp w6bsp w6bts w6bxy wbbzr wicei wicht wtcjr whtelz wicne w6enk wicnn whcns wt widak wtidey widgq wtdin w6dlu w6dmk widoj wtdsl widtg widtu widwa wtidwi w6dwy w6dyz wteb wteaa rb where wicto wtictp whcui w6cuh wtevd wtcwi whebg whebin whedo whegh whegk whegy woehi w6e)z wieos whep! whepl whept whesa whesz whetp w6fk w6ha w6ht w6js wihog wisw wivk wiwb wiwn w6xs w7aal wiaax wivabh wlacy wvadb w7afl w7aiz w7akz w7amm wiamo w7vhv w7o) w7om wJor wSag] wSaje wSapm wSavo wSavp wSayo wSayw wSazo wSby wSbae wSbax wSbbg wSbef wSbeq wSbgy wSbjg wSbkp wSblh wSbvb wSbyt wSecj] wSccn wSecco wScft wSchg wScko wScnl wSbqi wSbqu wSeoq wScpe wscss wsct]) wScxv wSdex wSdno wSdqk wSem wShi wSjl wSke wSkx wSmb wSpe wSpl wSpp wSsg wSuf wSze w9acl w9ads w¥afn w9agu w9apm aYagh w9aqz woarf wOark w9atq w9auh w9ave w9azy w9baz wbba w9bbo wYbca w9beq w9beu w9ber w9bjc w9bjz w9bma w9bmx wUbnf wYboa w9bpn w9bqv w9bwt w9bwx w9bxk wIcef w9edu wScfn w9chx w9cemf w9cou w9ceps wIerd wIesg wicti w8evt w9ewx w9dbj w9dbx w9ddy w9dfy w9djk wadkg w9dla w9dma w9dna w9dpb w9dsk w9dxe w9dxp widzm wSeah w9ege wIeiy w9ejp w9ekk w9ekq weno wienr wYeos w9eqe w9euy wetq w9evt wOfi w9fz wfae wifcx wfdj w9fdl w9fdw w9fem w%igj w9fil wOfiw wOfmr w9imu wOfsw wfty w9fur w9fye w9g¢q w9gac w9gaq wOgbx wogcex wOe¢dm w¢fh wigit w9g¢eb wSache wghv wI9zii w9hd w9hw w9lk w9na w9nb w9ss w9ui w9uz kialm k6cib k6dju k6dtg ve2bd ve2be ve3sb vetas vetbr vetho cmlaz em2jm cm2yb em5fl em8by hre2 lu3pa nnFX nanlnic ti2hv tiStss pylah velfg x9a zx6z. W9U M-W9BOH, M. W. Macy, Lake Syracuse 3 Ind. iW awasee, 7000-ke. band wiaax w7adn wiaff w7age w7alj w7alk w7amr w7a0 w7bb wiex w7dw wvgee w7hn w7vho w7hv w7kj wi7li w7it w7lz w7na w7vnr wpa w7zz whac] wiaek w6ajn whanl whap woaro wiasm w6bbh w6bpe wéibqp w6brq wtébtb wtbz wibzv wicda wicmo wicpu wicqu wtcry wiexp whdav wideg widen w6dfs wtdio wtdlx widnz wtdsj wtdto widui w6dur wiea w6ebge wtefa w6elr wiely w6elz w6eme wheos w6equ w6erk wteru wiery w6hs w6me w6nf winh wore wisf wisw wia wsbs wfat wsbn k7aop vk2he vk2hl vk3pp vk3pa vk3wx vk4at vkido vk5jh velax vethp vedhe kfr5 kfr6 kfuS kdv5 ti2hv ti2wd ti2ea ti2fg cm2ac em2az em2yb em5dfe em5fl emd5az helfg heldr he2jm he2hp k6avl k6bhl k6bqh ktdef kidtg k6edj k6etf nj2pa x9a x9b Calls Heard. OST 51 x29a zllan zllfw zl2bu zl3as zl4ae nnfx nnxe nninic nn3nic nn7nic nncab 55x k4kd zs2b bam geo oolr) WIBWC, M. Von Ploennies, 3851 Lincoln Ave., ( "hicago, Til. w6aqq w6by whtbtx w6dt widgq wteog w6hj) w7Jaav w7afo w7alj w7ek w7mn velar velcr velda ve2al ve2bg ve3bo ve3bq ve3cx ve3dd ve3seo ve3vs veibg nnfs nninic nnex x9a x9b e2jm lu3dh 55x k6avl kédju kdv5 cm2yb em3af gSby giml g6xb g6xj zs5e zs5d zl2ac zl2aw zl3be zi4ae vk3ac vk3ga vk3kh vk4cg vkShg vk5ja vk7ch ear62 ear?2 VEL4BQ, J. L. Green, 115 Furby St., Winnipeg, Manitoba, Canada 7000-ke. band k6axw k6bra ktcjs k6cye k6dqq k6dv k7ak k7aop lg vk2aw vk2dy vk2jc vk2no vk20ow vk2sm vk2tm vk3jk vk3pp vk3pa vk3rg vk3wx vk4bh vk4bu vk4tdo vk4hk vkiw! vkogr vk5he vk5mj vk5wr ve5aw x9a x29a zl2aj zl2be zl2bp zl3as zl3cm zliam 14,000-ke. band celah ce2ab ce3bf em2jt d4jl fSex fSda fSdot fSfr, f8jf fShel fSsfr fSwb fSwhg g2ao g2cx g5bj goby g5qa g5yx g6hp g6ll gint giqb girb gévp gbuh giwb g6wt g6wy hb9d lu3dh lu3fa kfu5 on4fp onthe on4jj on4tro on4rs nj2pa pylaa pylah pylaw pylax pylbr py2aj sslap ti2hv voS8ae voSem x9a xlam W4VA, bal ce3bf cm2jm em2sf ecm2sh cm2yb ecm5fl cnz7 gh4 kidj kime kticib ktdv ti2hv tiZwd ve2bh ve3cm ve3aa veibg vetbq veibr vetce vetef veigd vethb veitjb vk2hg vk2hl vk2ku vk2sg vk3pa vk3pp vk3rg vk4bh vk5bj vk5kj vkimj vk5wp vk5wr kfu5 nninic xlj wivn wive w7aax wvabh w7aiz w7bx w7de w7dd w7fh w7hp wi7iy w7ke w7lp w7mb w7mh w7ny w7om w7pe w7qd witj w7uv wvuz wiwy wivd VA2ZRX, Rockdale, N. 14,000-ke. band wilbux wiry wicje wlmk w2abu w2amr w2bn w2bjg w2dp w2jn w2rs w3aqi wiaef wtajk wSbek w5jv wiql wiawz w6aez w6bjd w6bxv w6bax wécut wo6car wicub wicgqg widow widbo wéfh w6fk w6epx wh6eva whepz w7hn w7ga w7wp wSapb wSbud wScra wSid wSdjv wSdsi wSdyk wSgez w9av w9afn w9cxx w9crd w9dfy w9dkg wef w9env w9emr wOfbv w9fxj w9gbx aclbd ac3fr achay celak celah celai ce3bm ctlaa cx2ak d4uj d4yt ear21 earll6 fSaxq fSca fSda f8fk fSgy fSho f8jf f8wb fSwhg f8xh fSzx g2op g2yu g5bz g5uq g6nf g6nt g6érb géwi g6wt ilau jltx j2by j3dd lalg oa4l oa4o oa4q oa4t ontbx on4fm ontfip onthe onthp on4ja on4us on4ww oz7y pk3bm pk4az sm5uk sp3kx suSrs ti2hv x9a VS? AP, A. M. Rahim, Wellawatte, Colombo, Ceylon vk5aw Taylor B. Rice, Ripley, Tenn. S. W., Australia 14,000-ke. band au7ab au7kad aclbd ac3fr ar8ufm ctlbx ctlaa ct3aa d4fiw d4uak d4aar diby d4agn d4vp d4an d4ib d4aci dua ear21 Continued on page 66

Page 50

W Sta Correspondence The Publishers of QST assume no responsibility for statements made herein by correspondents ndard Frequencies for the Commercials Western State Teachers College, Kalamazoo, Mich. 1 word in appreciation of the rd frequency transmissions from W9XL. There is certainly great vice if one can judge from the that are outside ney limits. Continued publicity will certainly encourage a more this standard frequency service. ttempting to calibrate a new quency meter from these standard Listened for WIXV-WIAXV on hedule of October 11, but was r him. Tried W9XL on the evening | ume date. In the 7000-ke. band r his 7000-ke. transmissions but that. | might say that they were dup by automatic signals from tions with very strong off-wave VIK, just below 7000 kc. and WEE 50 ke. were the worst offenders. in the 3500-ke. band are very rec ived. of these standard frequency would prove of some service to itions who seem to have trouble r signals out of the amateur bands. fact that key clicks from these tions, which block off sections of row bands, does not encourage to be careless about keeping their the amateur channels? HW. G. Marburger, W8CVQ ur stations Some Comparisons ng no power supply for my ter, I listened in on the various comparison of the two general the 3500-ke. band and in the Here is what 1 found, which I what interesting: 10-ke. band 14 d.c. signals or 87% and 15 d.c. signals or 30% OST JANUARY, 1930 These figures were made by tuning over the band only once at about 7 p.m. Eastern Standard Time. One notices, immediately, the difference in the number of stations on each band as well as the relative quality of the notes on the two bands. When the relative widths of the two bands are compared, one can hardly be surprised at the difference in the number of stations on each band. I hope some of the fellows will be induced to put in some filter so that the per- centage of r.a.c. signals will soon be smaller than given above. I was recently in Europe and noticed that the general run of European stations are entirely modern, where the owner can afford it. Most of the European stations have much better receivers than the usual American amateur station has. — John N. Boland, W8ASC More Statistics on QSL Cards Concord, N. H. Editor, QST: In reading W9AAB-W9DNY’s figures about QSL cards, I was interested to find out just how the percentage of QST7' receipts was at my station. | have kept an accurate record of every station worked, and whether they have sent me a card or not. After every new QSO, I fill out a card for the station. If the call-book address is not correct, I set aside the card until the new book comes out or until I receive a card from him. The following percentages are taken ever since the station has been on the air up to the first of this month (five years). District Cards Received Ist 68% 6th 63% 5th 57% 8th 55% 9th 52% 7th 50% 3rd 49% 2nd 45% ith 40% Canada . 53% Foreign countries, outside U. S. A. and Canada 647, Total number of different station contacts is 1161 with a percentage of 56. This is somewhat better than W9AAB-W9DNY’s record but certainly is far from where it should be. I was surprised myself because I didn’t think that my percentage would be much different than his. I do think that the cards are coming in just as well

Page 51

930 the

W. W. Dillon & Co. One Mile from WSM— 400 from W MAQ—and the 712 Cuts 20 kc.!

dest Realtors ence Nashville, Tennessee well “Silver-Marshall, Inc., two Chicago: two “I have had your 712 tuner rised for about ten days now . . . over Ss on a hundred stations have been received ... 1 live within a mile = ll be of the towers of WSM (650 ke.) The New “ Boss of eT- ut am able to bring in WMAQ a hs (Chicago, 670 ke.) and KPO the Air S-M712 | the 722 Band Selector Seven Providing practically all 1930 (Oakland, Calif., 680 kc.) ... I find I get results on a short indoor aerial which you claim only when using a longer outdoor antenna . . . 1 am using 30 feet of Far more selective and sensi- tive even than the Sargent Ray- ment 710, the new all electric single control 712, with band- irely F r i : $200 rubber-covered wire tacked up in the attic . --Some filter and power detector, stands st if a “ee SM 722 is ¢ iced night I may putupa decent aerial, connect it as you far beyond competition regard- st oO a 3 2 —~ ot : direct and bring in China.” less of price. Feeds perfectly into —_ a dly low co arison. ~ . vers screen-grid tubes ee ae de- —M G Horkins ber —_ — ~~ sn —e S. tector), band filter, 245 push- po im ne = as ~~ ASC pull stage—these help make the The custom-built S-M 712 used by Mr. Horkinsis easily mounted for use as ds 722 the outstanding buy of the year at $74.73 net, completely wired, less tubes and cabinet. Component parts total $52.90. Tubes required: 3—’24, 1—’27,

a straight one-dial all-electric tuner, as easy to operate as the cheapest radio. Whether it’s a world-beating set for your own home, or a custom design to build for “fastidious listeners”—the S-M 712 so far over-

radio tuner in a rack-and-panel amplifier installation; the super- lative quality of its reception makes it ideal for this purpose, while the low-impedance power

gS : —'45, 1—'80 shadows competition that comparison becomes detector works perfectly into ludicrous. or type 2 er amplifier. Beautiful Cabinets ubes required: 3—’24, I— 27. bout : : — Price, only $64.90, less tubes, in how The handsome new 707 table ™ And if You Prefer & Still Lower Cost shielding cabinet. Component 10W model shielding cabinet, finished Silver-Marshall, Inc., Chicago: parts total $40.90. my in tich crystalline brown and “I received my 722 . That receiver is certainly . very gold, suitable for 722, 735, or the best for the money—KDKA or WBZ without any 677 Amplifier | = 735DC, is | $7. ~~~ - heterodyning at blasting volume, or WRVA and Superb push-pull amplifica- rangements have been made WPG, or WJZ and WBBM, or WEAF and WMAQ. tion is here available for only out whereby these receivers may be (ai four are 10 ke separations.) WJZ, WGY, KDKA $58.50, less tubes. Ideal for the . housed in magnificent consoles iCK AC “apa “ -— ~ sets 712, since it furnishes all re- Ss 1s epecially adapted to them. Be °"< AC, 400 to 600 miles away, are regular day- voig AC. (a0 volts B, 24% new wre to send for the new Fall light features . I will keep on boosting Silver- volts C.). Tubes required: hi $M General Parts Catalog, for Marshall sets like I have been doing since four years 1—’27, 1—’80 om- um. dstails of these cabinets. ago.” —Gleason Belzile, Rimouski, Quebec, Canada. | parts total $43.40. “Ince first a e ° Short Wave Reception Without Batteries ad A screen-grid r.f. stage, new plug-in coils covering the bands from 17 to 204 meters, regenerative detector, a typical S-M audio amplifier, all help to make this first a. c. short-wave set first also in performance. Price, wired complete with built-in power unit, less cabinet and tubes, only $64.90. Component parts total $44.90. Tubes required: 1—’24, 2—’27, 2—’45, 1—’80. Two extra coils; 131P and 131Q, cover the broadcast band at an extra cost of $1.65. Adapted for battery use (735DC) price, $44.80, less cabinet and tubes. Comy ponent parts total $26.80. Tubes required: 1—’22, 4—12A. All prices net. EE ERR IR 3 Ask about our Silver-Marshall Inc. : The Radiobuilder, a monthly publication telling the Authorized 6409 West 65th St., Chicago, U. S. A. ts Is very latest developments of the S-M laboratories, is too ‘ F tend hii aad ith vhat valuable for any setbuilder to be without. Send the Service Station Senc your new fal gnlee wit coupon for free sample copy, or to enter your subscri’- Appointment! sample copy o ac . ut tion if you want it regularly. . For enclosed 10c, send five new was S-M Data Sheets, including those $ 6409 WEST 65TH ST. on 722, 712, 735, and 677. that SILVER-MARSHALL, Inc., CHICAGO, -- U.S. A. aa Name wel Address ee — It Identifies You and Helps QST

Say You Saw It in QST

Page 52

Facts you must know to pass the radio operators’ examination— UNDREDS of practical radio questions and an- swers are contained in this book. It gives you an authentic source of “inside information” on what you will be asked in qualifying tor the amateur or for every grade of commercial operators’ license. ! Radio Operating Questions and Answers By Arthur R. Nilson and J. L. Hornung Second Edition 267 pages, 5% x &, 91 illustra- tions. $2.00 postpaid. This is the enlarged second edi- tion of a book formerly pub- lished as Radio Questions and Answers. It covers the great ad- vances which have been made since 1921 in the art of radio communication; it takes into account the new technique of broadcast-station operation which has been evolved through electrical, mechanical and phys- ical improvements. Chapters I Diagrams and Explanation of Complete Commercial Transmitter, Receiver, and Auxiliary Equipment. il Tube Transmitters. I1l. — Arc Transmitters. IV Spark Transmit- sand Transmitters in Genera teceiving Apparatus and Radiocom- pass. V Storage Batteries. VII Motors and Generators. VIII. — Ra- dio Laws and Traffic Regulations. IX. General and Theoretical Questions. x Broadcasting Transmitters. XI. \mateur-Station Operation. Fill out this coupon— Vou will receive the new second edition 10 days’ FREE examination. It vers the latest laws and regulations erning radio operators and the oper on of radio stations. ORDER NOW. McGRAW-HILL FREE EXAMINATION COUPON 7 ] ’ Nilson and Hornung's Radio Operating Questi Answers $2.00 postpaid. | will either return the | k n 10 days, or remit for it at that time. ba ] A ! lin the U. S. and Canada only) | Q.S.T. 1-30 — ee ee ee ear eet ere Cee now as they did three and four years ago so | do not believe that the QSL situation is any worse than it has been. — C. B. Evans, W1BFT Old Timer Has His Say 40 Underweod 8§t.. Newark, N. J. Editor, QST: I have been getting QST from the newsstands since June 1921 and think it is about time | became a member, so if there is any more room in your League, please make me a member. I started in 1908 to try to copy code with a coherer and relay which never worked and finished with a silicon detector, an electrolytic detector, loose coupler and Brandes ‘phones. Also had a 1-inch spark coil with the vibrator screwed down in order to get that “skeeter” note,asyne spark gap and a 6-volt 60-ampere hour battery that I carried two miles to be charged. The spark coil was purchased from a fellow by the name of Chambers in Philadelphia who was making a lot of noise in the newspapers about copying “‘wireless’’ with dish-pan and bed-spring antennas. At that time Collins was trying to bust the ether with a radio ‘phone using revolving carbon dises for a microphone. I tried but never heard him. I copied press from WCC at Wellsfleet, Cape Cod, nearly every night, and used to hear SC, PT, NAH, NAS, NAL and others I don’t recall at the present time, as well as numerous ships. I quit the game about 1912 when I came home one night to find my mother had called in the junk man and cleaned me out. I rushed over to the junkie, but was too late, for he was breaking up the last piece of equipment — a 6-volt ring armature motor from an Edison cylinder phono- graph. This I had rigged up with a bicycle frame as a generator to charge the battery. It seemed simpler to sit down and walk those four miles to charge the battery than to carry the battery that distance. My mother was not to blame for calling in the junk man as I was making a “coffin” and had wound pies and pies of wire and had upset a pan of wax on the stove and smoked everybody out of the house. I wonder if there is anybody who remembers hearing my station in Frankford, Philadelphia, twenty years ago? I used the home made call letters WBS. I’m going to try and slip through for a license. They say “one once a man and twice a boy.” I'm thirty-five years old this month, so I guess I’m starting back again. — Wm. B. Schaum W2KU Helps Out Paudash, Ontario. Editor, QST: I'd like to tell you about a little incident concerning myself and to express my great appreciation and belief in amateur radio. 54 Say You Saw It in QST — It Identifies You and Helps QST

Page 53

ome Tr to king ring ono- ame med niles tery | the had et a ody bers yhia, call onse. oy.” rucss “aum ario. dent rreat Take this consulting specialist with you on your radio servicing calls “Madam—let me introduce the FACTORY ENGINEER” HINK what it would mean to your business if you were known to employ factory engineers for servicing radio sets — engineers fa- miliar with every constructional feature! You would get every servicing call in your territory, because customers would have confidence that these men would know just what to do in every instance, and could promptly restore the set to perfect order. That’s exactly what the Weston Model 547 Radio Set Tester is in effect. It enables your servicing men to become as experienced and efficient as factory engineers. It helps the manufacturer make good his guarantee of performance; it helps you increase your servicing business with steadily increasing profits, and makes friends for your business and customers for your merchandise. , All told, the Model 547 is an outstanding achievement of the year and no dealer or service organization can afford to be without one. Write for detailed instructions on the scope of this instrument. MS ess A INSTRUMENTS WESTON 602 Frelinghuysen Avenue $3 Newark, New Jersey Say You Saw It in QS7' — It Identifies You and Helps QST ELECTRICAL INSTRUMENT CORPORATION

Page 54

! | ! ! ! ! ' NVew! preasa AmerTran Power Transformer © ite progress in the development of neformers for all radio receiving sets an Transformer Company announ- fection of the new type PF245A. This r transformeroperates aradio receiv- ved with 214 volt heater for heater tubes and 214 volt filament for a the (UX245 or CX345) which closely hea the 210 in undistorted watts erTran Power Transformer Type ie designed for a 60 cycle 115 volt ce, and hasa continuous rating of with primary taps for 100—108—115 Ite. Afour point radial switchregu- e operation for different primary There are five secondary wind- Because of itelower maximum volt- ll secondary connections termin- solder lugs attached toa bakelite sl board. ew, heavy duty power transformer mpact, sturdy, beautifully ma- d and mounted in castiron end « provided with mounting feet. I! AmerTran Transformers the \ is built to deliver sufficient voltage for maximum require- out and mail the coupon for Tran Bulletin No. 1088 giving plete description of the PF245A er Transformer. rice $22. East of the Rocky uUntains. AMERTRAN ERICAN TRANSFORMER CO. 2 Emmet St., Newark, N. J. sees eee eoee - 1 AMERICAN TRANSFORMER Co, @*" "3?! 17K I t St., Newark, N. J. ! Plea ne complete information on the new er Transformer. i You Saw It in QST — It Identifies You and Helps QST An operation for appendicitis kept me in the hospital in New York for six weeks last summer, When I recovered sufficiently I came up here to our Canadian camp. It is 17 miles from the nearest railroad and there are no telephones, Because I am not a British subject, I am unable to operate a transmitter here, but of course have a short wave receiver. 1 heard W2KU, operated by Mr. Oscar Oeh- men, one day and wrote him asking him if he would take a few messages and send them to me, He came back on the air upon receipt of my letter on schedule time and hasn’t missed a day, nor 1 a word for over a month. He has sent me news bulletins (for my own personal information) and many personal messages. A short time ago | was taken with a relapse. Got word to him to see my doctor. He did so and sent me medical advice and I am now almost entirely recovered. This is just another proof of the worth of amateur radio and its dependability in cases of emergency. I cculdn’t go on enjoying the benefits of such an organization as the A.R.R.L. without being a member. Send QST’ to my Brooklyn address please. Alfred D. Greene Calls Heard Continued from page 41) earl13 es2ex fk2ms fk4ms fk5cr fk6er faSbak faSbm fShm fShr fScp fSeo f8cj f8do fSkz fSzb fSda fSrko fSjf fSxz fSwb fSpb fSig fSwrg fStsn fSdae fSaxq fSwip fo3sr gtixe géll géwl g5bz g5wp g6wt g5uq g5tz g5ms g5ux g5bd g2bm g2ax gént gthp g6rr g6wn g5ml gtvp gtpp gidnj hafde ligl Ileoe k6muv kfr5 oh2nad oh2nap oh2nag ok2lo ok2em oklab oklm on4uu on4jj ontfm on4fp on4tus on4ft ondar ok3sk okimx oklibk okIrv 027t oz5a oz5t oz5w oz7y palaf paOvn paOwr pb7w pk3bm pk4az pk4bo pk4bf suSrs suSkw suSwy sm6ua sp3ar un7ww uowg velbr vk4rb vk4bh vk5gr vk6mu vk2no vq2bh vq2ne vs3ab vu2dr vulbg vu2ev vu2ek wlajt w2hj wSalh w2el w2aan w2bjg¢ w2nf vilac yillm yilmdz yi2gq zllfw zllas zl2cm zu6n ss4m zttx ztir zs2n 7000-ke. band klaf kIldj kize kipw klee kljr klac klhr kixa klee kid kire kiIme vslab vs3ab vstiah zs4m vk5hg vk5mk pmz Johnson, 1821 W. Chestnui St, Denton, Texas WAALS, *‘ Felix” (Heard off Chile Coast) wlamd wlawk wldl wlmk wirp w2anr w2apk w2aun w2bae w2bay w2bda w2ceqd w2ecxl w2fa w2mk w2nl w2sm w2wr w2wy w3aiz w3anh w3apo w3avf w3axz w3enj w3pt wig wiaa wiaef wiald w4ao wiax w4fx w4il w4is w4jr wiqb wi4ql wish w5afg wiahq w5azs w5ibbe w5bbx wSbhv web wher wdjc wojw w5oh w5ql w5uf wiww wéaah wéaak whac w6ad whiahp w6aob whaqp qbaso whavj whaxe wibam w6bpe wtcfk whcfx whegz whcii w6enw whcpu wieqk w6cui wicuy w6e2zz w6dal wé6dli w6dui widwm whdzg whebg whebz wtedf whegk wtehi wheii whequ w6kj w6nz w6sf w6tf w7aah w7abh w7bb w7fl w7na wiwl wSamb wSaxz wSayh wSazq wSbae wSbav wSben wSbdf wSbyt wSecfw wSchg wScib wSenr wSesm wScvi wei wel wSde wSdyr wSeb wSke wSpl wSsg wSsy wSus waes w9ahe w9ahq w9a0f w9atu w9avh wObdt wHboa wIbpg w9bpq w9bqw w9bre w9bxk werd whctw widfy wdpb wOdr webb w9ebo w9emr w9ez w9faq wIfkl wOfqn wfqs

Page 55

1 the mer, re to the ones, f rable a if} S e have Oct Consider these » me, - etter ches 1T2 Points tion) x of Excellence | red. th of es of - Mw BROWNING-DRAKE dress vv screen-grid RADIO l.Screen-Grid effect 10 KC selec- tivity. combined with many others in the lubes. 8. Mershon trouble- proof condenser. 2. Semi-automatic fShm z {Swh ce g6ll eveles and call letters g2bm ; haf3e ok2cm ond4ar paOaf nine tubes. suSkw vk4bh 1. Tuned antenna. vu2bg , w2nf 5. Push-pull audio zsim tuning — both kilo- 9. Voltage, regula- on dial. tion adjustment 3. Five tuned circuits (manual). 10. Power unit inte- gral part of chassis. ll. Special electro- 945 dynamic speaker. (245 power tubes). lyne sped p , F ! 1 i tabl 12. Selected walnut 6. ower «¢ etection our models console and table = a toch Table model, $102.50. Consoles and American gum- e kid (plate rectification) from $142.40 to $188.50 wood cabinet, hand- ITZ i al. i optional rubbed satin Duco sy 7. Band-pass filter finish. at St, See — hear — test this set for tone — for distance, for selectivity, for every- thing you want in a radio set. We welcome inquiries and can present an wJbae . wiwr t wig » wiqb web . . wéaak Browning-Drake Corporation whaxe whcpu vidwm whequ 1 wiwi wSbdf wSeu - . , , : ‘oan Over 1,500,000 people listen-in on Browning-Drake Sets wobpg wOdpb wOfqs unusually attractive franchise proposition to any of you who are dealers. 228 Calvary Street, Waltham, Mass. Say You Saw It in QST — It Identifies You and Helps QST

Page 56

s hugged Accurate-Permanent © SOLID MOLDED—\that is the secret of the superior per- formance of the Bradleyunit. Made in ratings from 500 ohms to 10 megohms, these accurate, noiseless fixed resis- tors are the choice of the lead- ing set manufacturers for grid leaks and plate coupling re- sistors. All Bradleyunits are color-coded for quick and easy identification. They are not fragile. There are no produc- tion losses due to breakage. Tem- Compare These Sener iscillograms and age do not affect Bradleyunit accuracy. Follow the example of , leading radio now re nciey. Manufactur- t Resistors. ers . an d standardize on the Brad- leyunit. Write for further in- formation m showing noisy ° e of other types and prices. resistors ALLEN-BRADLEY CoO. yreenfield Ave. Milwaukee, Wis. s “PERFECT RADIO ( RESISTORS. S NG e"s'c ss ss ss 8. Say You Saw It in QST w9isw w9itz w9fuq w9fi w9g¢dh w9gfe w9gm w9nk wSui w9un w9us he2gr he2jc he2jm kime k4aan k4kd kéavi k6boe k6cga k6cewb nninic vk2de vk2jo vk2sa vk3ml yilac zl2aj zl2as zl2da 2l2gr 2l2zb x9a SP38KX, Zygmunt C. Bresinski, Grottgera 2, Poznan, Poland 14,000-ke. band wlabr wlafb wlanz wlavj wlbfz wibkd wibke wlibkf wibkr wlbux wibvl wlbwa wlecz wiceh wicib wiemb wlemx wlkh wlkn wlkq wlmo wlnp wlom wlry wiwe wlws wlaaw w2adr w2aet w2ahy w2ai w2amr w2aog wary w2atf w2atz w2avb w2bai w2bda w2bhg w2jg w2boz w2bux w2ch w2cin w2cjx w2cwk w2dab w2el w2fb w2gp w2hj w2hr w2mb w2md w2or w2rs w2rv w2vd w3ac wadr w3ajd w3apn w3arp w3atj) w3avo w3bme w3bnu w3bph wibqv w3jn w3kj w3pf w3ut w3wm wtaef wé4ace w-tahh witbe wift w4js wizp wicgq w7alm w7kt wS8adm wsSalh wSapb wSase wSaxa wSaxc wSbec wSbud wScaq wSetj wSeqs wSdjv wSdub wShx wSme wSuk k4tkd kfrd ac3fr aulai aulak aulal auleg au7kad fmSgke fmScfr fm8jo fmSsm fmSsmu fmS8xx fmStun2 fk5er fqpm nj2pa celah ce2ab ce3ac ce3ah ce3bf ced3bm em2jt lu2ca lu3dh oats ocna pkljr pk3bm pk4az pylah pylaw pylax pylbr pylea pylel pyler pylem pylid pylxl py2ag py2ak py2ay py2be py2bg rxfr5 rx2ax su8gm suSkw suSwy velbr ve2aa ve2bg velbr ve3da vetcu vk2rx vk3bd vk3pp vk4rb voS8ae vs3ab vs7ap xpaQja yilac yillm yilmdz zllax zstm W3HO, R. D. Crawford, 106 N. Dooley Ave., Richmond, Va. woaap woaar wSabi woace w5afi w5ain w5ait woaha woadp woado woahp w5ajn wo5alz w5aoz w5aqe woaqx woark woaro wSaue woaxs woaye woayo woazv wobbe wobbx w5bdh w5bdj w5bfp w5bhm wSbhv w5bij w5bil wcbu w5ex wodf w5ef w5tq wogq w5gr woje w5jd w5la wimk w5nd w5ql w5qq w5rj w5si w5t] w5uo w5ux wvl woww woyl wtacl wiadp w6aga wialw wiann w6arv whaxm wibgv w6bly wiboa wibpe w6bpm wtibpo wébqk wé6bvx wibzy wicbw wicha wticht wichu wtcih wé6cjj wéecto wicub w6cui wiczz widbo wideg wide w6idjw wédmk whidog widrb widzqy widzj wieaa w6eb wihebg wiec wtecg wiehi wheij wheii wiejc wiel wielq w6esb w6fz wtihs wéio wipw wheqb wésj w6ts w7aav w7abh w7abk w7afr w7aki w7ap w7aq w7bb wide w7fa w7hv w7im w7iy w7nv w7oa 2wor w7qo w7tj w7wl w72zz velbr velew ve2ac ve2ca ve2cd vesaq vesbm ve3bo vescu vesdd veside veseo veshb veskr ve3rf vetbq vetcu vetic vedcp k4aan ktakv k4kd k7fq x9a x29a ce3ac cm2jm em2jt em2sh em5fl ctlaa ctl bx efSet efSer lu9dt nj2pa nj3pa nninic oz2mb pylaa pylea pylah py lid pylta py2ak py2al py2bf pySaf py7ab ti2hv ysinm zuéw cda ex7 cmyl eq7 fqpm kfuS kvua nglve nxOnie wsdn xen0Qja WSAIZ, J. Frank Wise, Jr., 18 North Oak Ave., Clifton Heights, Pa 7000- and 14,000-ke. bands w6ad w6aef wiafa wiam w6amo whamw wéhaie wéhaov w6aqgj wiavq wiawd w6bck wtbet wibgf wtbi wtibmu wibtm w6bzd wéibau wtichk wéchp wicui wicul wicww wicxw w6dre widxn whejc wieke w6elm wteif whenr wieqe wheva wheti wheov whit w6kn wtnz whtoi wéhtg wixbb w7aah w7aao wZaat w7aax w7Zait w7alm w7amo w7ba w7bb w7bu w7cx wife w7fh w7hv w7jj w7li wils wiry wits w7tx w7ua w7uz wivk w7wb w7wl w7zb w7aab bal em2jm emScx emSuf cmz53 d4abr d4ya ear21 earéd ear98 earl13 fSrkl he2jj illl k4acf k4akv k4kd k4aan kébex kiédvk 6dqq k6ewe kalhr nj2pa nninic nnicab nnfx pylas pylaw pylea rpx velca velce vetaj vetgf vethp vethr vetic vebaw vedgt vk2tw vk3jk vk3pa vk4ck ck7ch vk7ew vk7wi wsbs x9a x29a x2x x2por wy! W9GHI, Kariton Marquardt, Baldwin, Kans. 3500-ke. ‘phone band wlaby wlajr wlajt wlaoz w2aca w2bee w2gj w2nj w2va w3abn wi3aex wicv wins wipr wiqo wooo wad walt w4oa w5aox w5aug woawg w5awp w5kx w5pp whéabf w6biu w6bjq wiekk w6ean wep w6awm w6kt wérd w7acj w7aet w7ant w7wp wSadf wSaeo wSahz wSajh wSakw want — It Identifies You and Helps QST * = Since broa been Now rect Radi afe S$ able Prod: plant ment extre main chip cured bled. lated that ’ Jewel lite, vided sizes broad

Page 57

w Lbkf lemb wlwe NW 2a0g w2boz w2gp w adr y3bph vtahh wSalh wSetj ve3fr fm&jo celah | oats py lea py2be ve2bg vsdab Ave., “ Sadp w ark wSbbx webu womk woww yoaxm wibvx whicto y6dmk whecg s whio w7aki r wioa ve2ed . vedkr x efSct py lah ysinm nxOnie Ave. whaov wiibmu wicww whens 1 whtg w7amo li wils wizab | earéid 1 k6bex f py laa . vethr vk7cew ans. j w2vn q walt f w6biu w7aeu wSant il Since the very inception of amateur broadcasting, Jewell Instruments have ben favorites of radio hams. Now the Jewell Trio, consisting of Di rect Current, Alternating Current, and Radio Frequency Instruments, which ate so popular with amateurs, is avail- able in moulded bakelite cases. Produced in the precision moulding plant of the Jewell Electrical Instru- ment Company, these bakelite cases are atremely good looking and will re- main so because there is no enamel to chip off. The bakelite is thoroughly ured before the instrument is assem- led. The result is a completely insu- ated case, neat in appearance, and one that will not show age. well Miniature Instruments in bake ite, as well as metal cases, are pro vided in a great variety of ranges and wes that meet every need of amateur broadcasting. 30 YEARS MAKING GOOD INSTRUMENTS JEwven iy Radio Instruments Jor TIX Records use Jewell Meters Say You Saw It in QST PATTERN Nee oirect CURREN? MILLIAMPERES St = ty © New Ultra Sensitive D. Meters In these same excellent bakelite cases, Jewell now provides instruments with full scale readings of 200, 300, and 500 microamperes. These instruments in microampere ranges list at $24.00 each. Low Range High Frequency Meters Also in bakelite case, Pattern 68, high frequency instruments are furnished with full scale readings of 10, 25, 50, and 100 milliamperes. The 10 milliampere range lists at $40.00; the 25 milliampere range, at $37.50; the 50 milliampere range, at $35.00; and the 100 milliampere range, at $32.50. al Instrument Company t, Chicago, Illinois ag the com astruments | Jewell Electric & 1650 Walnut Stree Please mail liter a an plete line of Jewe s ture covert 11 Radio It Name--- Address --- oe © ee It Identifies You and Helps QST

Page 58

= Are We Right? uld have at least them ---one for omplete 1929 file ies, and one for )30 issue as pub- unit them as a OST Binder wire fasteners wy to mutilate Opens and lies flat position One-fifty each postpaid eep your QSTs always t them for future use. »king binder, too. QST 17 Park St., Hartford, Conn. Say You Saw It in QST — It Identifies You and Helps QST wSaol wS8aos wSayy wS8bae wSbro wSbuw wSbwx wSbxq wSecz wSdbq wSdce wSded wS8dsn wSdpd wSesl w8ne wSrw vethw W9IBFW, Chester Rector, R.F.D. No. 1, Tipton, Ind. 3500-ke. ‘phone band wlbjz wiedx wlegr wicki w2acg w2alk w2apq w2baj w2bwe w2gj w2hy w2pee w2pyu w3aex w3aif w3av w3bfz w3cz w3rb w3zm wtaaq witce w5ado w5awp whawg wobie wigia w5qj wikp wSaai wSaft wSafy wSahw wSahz wS8ajn wSakw wSaol wSaou wSasb wSasy wSatj wSawu wSbdm wSbuw wSbf wSbjw wSboe wSbxb wSbzo wSbzz wSaos wSawt wSakf wSeez wSefa wScfl wScjd wSemj wSemr wSbsi wSdoe wSdsl wSgy wSign wSgki wSlk wSop wSpia wSpkp w&rd wSrw wSwf wSwm wSewu w9ab w9agr w9agx w9ahi wIbny w9bzt w9bkx w9czu w9bwi w9dpgz w%esl w9eso wObjw wOfbx wOflz wOfql wOfzl wOchi w9slb w9mm w9cyq wd ve3ac ve3hb ve3em W6BUZ, Howard Fast, 1529 South Ave., Reedley, Calif. 3500-ke. ‘phone band w5gu wikx whaan whaai whabf whale w6bea w6beh wéhbif whbjq whbla whbru whbst w6bto w6bwt whcca whceg wicqm werk whdjx widva whef whehw wé6ere whesy w6kd w6kt w7ack w7aeu w7if w7wp w9bcg w9cjw wOdxn wesl wSeyv 1750-ke. ‘phone band woaek w9ewe wexp 14,000-ke. band aclbd celah ce2ci ce3bf ce2bm k4tazp k4bo lu3pa luSdy oa40 on4fp pk3bm pylah py2aj ve2aa ve2be vetbx veep vk2jc vs6ah 6ly per wsbs D4AAR, Christoph Schmelzer, Lichtentanne, Sach- sen, Germany 14,000-ke. band aclbd ac3fr ar2gb arSufm aulai aulao aulap au7ab au7kad ce2ab ce3ac em2ft ct2aa filol fk2ms fk5er fk6ecr fmSer fm&g¢ke fmS8kik fm8rit fm&ssr fo2sr lu9dt pkifr pk3bm pktaz pktbg pylah py law py Ibe klem k4azp suSan suSkw suSrs suSwy ti2kv velar velbr ve2bb ve3rf vk2rx vk3wr vk4fe vk4fa vkirb vk5hg vq2bh vq2he vqtmsh vsi3ab vs7ap vs7rl vu2dr vu3kt wlabv wladw wlae wlahi wlak wlapf wlaze wlbil wlbfd wlbfx wlbra wlbux wibv wleaw wiefe wlemx wiry wlvz wlxu wlyb w2abu w2aef w2ake w2amr w2amt w2anx w2aof w2a0g w2arb w2avr w2au w2ayr w2bka w2bki w2bh w2bla w2boa w2boz w2fl w2mb w2nf w2rs w2sv w3afd w3afh w3bme w3cgs w3kf wl wiace wiaef wtale wigv wizf xw7eff wSfz werd yilac vilmdz vi2gq zllfw zl2bv zl2bx zl3as zl3bx zl4ao 2s2n zste zsim zs5d zs5w zs6z zu6n rwx Hagar, 30 Adams Ave., West Newton, Mass. WIAZE, E. L. 14,000-ke. band ce2ab ce3ab ce3ag emSl ctlaa ear65 ear98 fSdaf fSdh fSedb g2ao goby goml g6me g6wt g6vp he2jm ktkd kfr5 kfud ontfe ontro ontrs on4tis pylaw py2al py2ay snifa velit voSae vo8aw vo8me whdev w6dre w6dzi w6eje w7be wad w7tj x9a xy zslp zs2n zs4m zs5l pu6in VESET., G. V. Lawrence, Box 186, Parry Sound, Ontario, Canada ce2ab ceBab ce3ae ce3bf em2emg cm2jt em2sh em2yb em3fe em5fl emS8by d4an fSbtr f8ex {Swbh g6qb g6wy heldr helfg he2bp k4akv k4kd k6bra kdv5 kf2f kfu5 lu3dh ludis lu3pa lu3pu tudda lu9dt nj2pa nninie nn7nie nncab nafs onthe on4tus ontww oxa pylaa pylah pylaw pylbr pyle as pylel pylem pylia py2ad py2aj py2ak py2bf py2bz rxlas ti2ea ti2hv voSaw wfa wiie wye xfShpq xw6chk xy x%a

Page 59

wSbxq . wSrw | pton, w2bwo t w3ez wogia wSakw wSbuw wSawt wSdoe » wSrd Ww 9bny wObjw 1 wdj edley, 1 whbif wheeg whesv wdxn 1 luSdy x vebep , Sach- 2u7kad » imSev pk3bm n SUSKW - vk3wr » vsdab i wlals wleaw f wake > waus fl w2mb kf w3lo “d_ yilae ao zs2n West ih fSgdb rd kfus ta velic be w7qd Sound, em2yd vy heldr ih lu3fs -ab> noft br pyle bz rxias xa —No wonder they’re all buying CROSLEY fp nage still demanding quality, the public has an eye to economy these days! That’s why Crosley Radio is now more popular than ever! Everybody is asking for Crosley — thousands of brand-new sets are rolling out of the big Crosley plant each day. National advertising in the leading magazines and farm papers is playing its part, too. The story of how the most noted musical artists in America were engaged to tone-test Crosley Radio and give Crosley engineers the benefit of their suggestions is spreading like wildfire. But check the sets, themselves .. . you'll see plenty more reasons why the Crosley line is so Red Hot! These sets embody every modern feature — and practically the entire line can be sold complete with tubes below the $150 price level! Your Crosley distributor has other facts to tell you, equally interesting and full of profit possibilities. Get in touch with him! THE CROSLEY RADIO CORPORATION Powell Crosley, Jr., Pres. CINCINNATI, OHIO Home of WLW — “‘the Nation’s Station” You re there with a Say You Saw It in QST — It Identifies You and Helps QST SCREEN Grip... TONE TESTED LOWEST PRICES CROSLEY 33-S. This graceful Crosley 7-tube Screen Grid cab- inet model, with Dynacoil Speaker, is beauti- fully finished in two $ l 12 tones of satiny wal- _ f . (without nut veneer. tubes) Other handsome 7 and 8 tube Screen Grid table and Cabinet models. $56.50 up! Western prices slightly higher

Page 60

RADIO Z TUBES ood Results are certain with Cunninghams behind the dial Be ir uniform quality and care- it ‘uction, Cunningham Radio ‘ub epended upon for maximum servi lute accuracy. Perf laims are backed consistently veal r,by the steady, efficient service hese render in millions of American Ta tandard Since 1915 E. T. CUNNINGHAM, INC. New Y Chicago San Francisco nta Dallas and sold under rights, patents, ns owned and / or controlled by » Corporation of America Say You Saw It in QST — It Identifies You and Helps QST George Petersen, 820 40th St., Brooklyn, New York City, N. Y. 3500-ke. wlabt wlbga wicki wlqo w2abi w2acg w2acx w2alk w2a0o w2aow w2azy w2baj w2bez w2bee w2bgz w2bpl w2bpz w2bql w2bsw w2fr w2gj) w2hy w2iu w2jk w2ma_ w2nj w2qn w2ry w2st w3abn w3ac w3acz w3adq w3aex wag w3ain w3aiz w3anw w3a0oq wati w3biz wacar w3cgb w3ev w3jf wSaah w3adf wSadi wSaih wSagw wSakf wSart wSawu wSbbq wSbf wSbiw wSbk wSbld wS8bpd _ w’Sbsl wSbye wScut wSix w8rd wSxk w9bjw w9eto ‘phone band A. Comender, Burg. Meineszlaan 91b, Roiterdam, Holland wlaep wlafd wlalb wlapq wibev wibkr wiblo wlbnp wlbux wlbqs wicib wicte wlemx wicut wida wigf wlkn wlom wirp wlxv wizl w2aba w2abu w2ago w2aih w2amr wary w2ate w2atz w2bif w2bih w2bme w2bmm w2bnx w2box w2bqw w2cin w2ctx w3dp w2fl w2mb w2rs w3ais wsasg w3bph w3tm w3pf wift wSadm w3atz wSepe wSgz wSuk wSza wSzze w9dar k4kd aclbd aulap aulaw celak ce2ab enSrux fk4mi fmS8cfr fmS8rit f28gom lu2ca lu3dn pk4az pylah pylaw pylea pylep py3ah suSan suSkw suSrs su8wy velbr velbv voSae vq2bh yilmdz zs4q zs5w zs6z zu6n RO?6 AUV1IAIT, Hitroff, Nahanowitcha St. 18, Tomsk, Siberia 14,000-ke. band wickw wlesm wlwe wlzs w2aaf w2aeb w2bai w2ch w2el wl2dg w2hj w3ja w3nf wSax wSauu wSbuo wScu wéSrd aclbd ac3fr ar8umf celak celah ce2ab ce3ac ce3ag cedbf etlaa etlbr ctlbx d4uj d4al dtkg digv dtul difv difw dika d4un d4jl d4yt d4thi d4taaz dtuak dtuab ei2e ce7e es3cx fSgdb f8fd {Spam fSfem fSctz fSorm fSzko fSjt fSzem fSeo fS8be fSbgb fShr fS8xh f8zzz fSmrg fSfaf fShz fSmst fShx fShe fjaap fSrab fSda fSswa fSlda fStsn fSawk f8wb fSzx fSaja f8jf fSwhg fSxw fSvp fSrk fSex g2ao g2bm g2zp gl2ax g2gef g2dz g2op g5ml g5nf g5wk g5vl g5wp giyg goby ghuw g5mg g5yx g5ux g5vm g5zu g6dh gédr g6ab gixx givp g6wo g6za g6xj g6hn g6vj g6xn g6nf giwl gixg giuh g6rr g6lk g6fy g6bd haf3xx haf3fx haf6b ilgl lade lu2ca lu2fi lu3dh lu3fa lu3pa lu4dg luSdy lu9dt oh2nab oh2nad oh3nx oh3np oh5ul oh7nb okaa2 oklab oklau okilmx oklm on4fn on4tus ontar on4fm on4ft on4ro on4uu ontfe on4jj on4gm ontgr on4ja on4jx on4ww on4ei on4bna ontke on4my onr33 oz4v oz5a oz7y oz7ay oz7cl ost pa0fn pa0gw paO0qf pa0cx pa0dw paQzf paOfr paOvn palaq paQwim pa0wz paQhb pa0ck pa0zj pa0wj pb7e nkljr pk3em pktaz pk4bo pylca pylem pylaw pylel pylaa pylbr py lbe py lax py2ik py2ad py2bg py2ak py2be py2ay py3xs zy le tdpa tm5tm tm5uv tmd5yf tmStn tmtuk tmbzb tp3ax tp3nb tp3kv tpps tuSan tuSrs tuSkw tuSwy un7ww aoxl ve3ln ve3ag vk4ab vs3ab vsGah vs7an vu2dr vu2by vu2kt yilmdz yilac yi2gg zl3as zstm zutn Holme 8, Alpha , lowa City, Towa WIAEW, Sigma House, W9IBRH, Vernon 109 River St 7000-ke. band vk3ci vk5aw kdv5 kir5 kfri kfu5 ti2hv ti2wd cmlas em2yb emSby emdfl em5ry emz5 heldr helfg ke2jm xa x29a azllfe zl2gk zl2go nninic nn7nic nnofx yslig zslb bl tela xy k6cjs k7ak k7mk wfat 14,000-ke. band lu3fa lu9ce pylah pylaw pylax pyler pyles py2ay py2bw py2ii velbr velew veScp voSaw kfu5 celak ce2ab cedab ce8ac ce8ag ce3bf ce3bm ti2ea tiZhv cm2jt cm5fl x9a zllao oato ear cx2ak zs2c zs2n zutin pSS xy 173 North Adams St. N.H. band W1MS, Charles H. Horton, Manchester, 14,000-ke ce2ab ce2ad ce3bf ce3bm cm2jt emScx ctlaa ex2ak f8bq fSda fSex fShpx fSjf fSoc g2ao g6dh gigs g6wt giwy k4aan k6akv on4us lu3dh lu3pa luSen nj2pa pylah pylaw pylea pylel py2ak py2ay py2ih py2ik velbr ve3bm veshb vesdd vetic ve3hr ve5cp vk2aw vk5hg vk5wr vo8aw vodSme wia zsims Fou

Page 61

ork 2a00 2bpz w2nj wag segb Sart vSbsl Lbnp wlkn Zamr 2bnx w dais waz celak »ktaz uSwy N isk, wel wSrd ce3bf difw . ce7e tszcem iSmst fSwb 1 g2zp . goyg r gbzb 1 g6xq rl lade h2nab oklau on4uu on4bn 1 ostt pa(aq pk3cm py lbr py3xx ) tpdax w aoxl vu2kt Alpha awa emlas jm xa rslb bl py 2bw b cedab da zllao ms St. ak f8ba y ktaan Ww py lca b vesdd sme wis Airplane Floyd Bennett, which carried the Byrd party safely to and from the South pole The First Radio Message from the South Pole —flashed over antennae equipped with PYREX Insulators Four PYREX Insulators like this are used on the antennae of the Floyd Bennett “Radio made this expedition possible” says Commander Byrd RIUMPHANT at last, after months of preparation, Commander Byrd has flown over the South Pole. From his airplane, the Floyd Bennett, he flashed the news by radio while flying directly over the Pole. On all his base ship, airplane, and portable stations Commander Byrd uses PYREX radio insulators, exclusively. They have well earned his confidence. The Commander’s radio message that he was flying over the North Pole, his distance record for low-wave length signals, his reports from the transatlantic airplane, America — all were sent over PYREX insulator equipped antennae. Broadcasting stations, marine and stationary radio communication systems and critical amateurs all over the world find that PYREX insulation preserves maxi- mum strength and clarity of radio impulses. PYREX Radio Insulators are but one of the many Corning Glass Works achievements that contribute to human safety, comfort and industrial progress. CORNING GLASS WORKS, Dept. 64 Industrial and Laboratory Division CORNING, N. Y. T. M. REG. U.S. PAT. OFF PYREX A MARK OF CORNING GLASS WORKS Say You Saw It in QST — It Identifies You and Helps QST

Page 62

| W1ABG, Al Giddis, 53 Lamb St., Lowell, Mass. 7000-ke. band AC M FE WIRE PRODUCTS em2yb em5fe er3 he2bp he2gre hre2 kfry nnfx nnInic ti2wb vk3pp x9a wedr wuaa . > " r Magnet Wire Wound 14,000-ke. band Magn re All Insulations ce2ab ce3bf ce3bm em2jt emScx em5fl ex2ak d4aar d4j] rnished Insulations d4yt fSaap fSaxq fSje e2cj goml g5ms g5qa géci gigh géll givp giwt ctixb gtixj hafSb lu3dh luvdt on4tau on4fp onthe >. .| ' » Pas . Parve r and By Pass Condensers paQqf pylaa pylah pylaw pylax sniaa voSme vp2oux wta zu6n de to Recognized Com- . , mane > es , : . ; 7 . W2AFJ-W2SN, H.W. Yahnel, Lake St., ner s including those of: Helmetta, N. J. Electric Mfrs. Assn. vk3pp vk3rg vk2ch vk3ls vk2aw vk3ecu vk3ru vk2ns vk2hm vk3pa vk3ja vk2ao nj2pa nnOnic x29a em2yb em2jm em5im emofl z2i2bz zl2gn zi3er zllfr zi2bz zi4bg zl3em zi2al for Testing Materials zl2bz zl2bi zl3bb zl3em vo8z k4kd k4atr k6brt k6bra g5by ti2wd kfu5 kdv5 wedr nufacturers Assn. nufacturers and suppliers W5SAVD, John T. Furlow, Mount Enterprise, to | most discriminating users. Texas 7000-ke. band vk2aw vk2jk vk2ku vk2ow vk2yd vk3jk vk3rg vk3ru vk3vp HE A e vk3wo vk4bh vk4eg vkSgr vkohg vk5it vk5m) vkSowr vkthe vk7lj zl2gn zl4ao zl4ac veigd vetho ‘EW HAVEN, CONN. OKRP 19, Alois Weirauch, Mesitec Kralove, Czechoslovakia Rranch Offices: wlads wlae wlaeh wlaep wlagx wlajc wlajt wlanz wlasu . . - wlavg wlazk wiber wlbft wilbil wlbux wicaw wlecz New Cleveland wlemx wierd wida wlek wifb wife wlih wlmo wilrw 52 Van ilt Ave. Guardian Bldg. wilvz wizs w2acd wlafr w2agx w2ai w2amr w2asy w2ate ae wlave wlbda wldfi w2bh2 2wbjg w2bjv w2bn w2bnx w2boa Chicago w2boz w2bss w2ch w2cuq 32el w2jn w2mb w2rs wsahw wiajd w3ard w3at]) w3ed2 w3ecz wike w3pi waef waf wibn wee wtpb w4va w4zp wSadm wSbbp wsboz wSfz aclbd arSufm au7ab au7as au7kad celav ce2ab ce3ac cedag ce3bf em2jt ct2as ct3aa fk2ms fmSgke fmSjo fmSkik fm8mst ——— : fmSrit fmXsmu k4aan k4akv k4kd lu2ca lusdh lu3dt lu3fa lu3pa nj2pa pk4bf pylaa pylad pylah pylaw py lax pylbe pylel py2ag py2ay suSkw suSrs velar velew ve2al ve2bd ve2bg ve2ca vk2no vk3xo vk5dx vk5hg voSae kfh5 kfu5 BOUND VOLUME W6ERK, George W. Mesher, 2949 Sacramento ~~ 4 St., San Francisco, Calif. «K | 1] 7000-ke. band ‘ i O wlabt wirp wlagj wlesk wlcek wladw wimk wlsz wlasu wlanz wlxe wixm wlxv w2fp w2g¢d w2bda w2fe w2fy wlblx wlexl w2jec w2bif w2ace w2cvj w2bda w3aws wiawb i2 N. Michigan Ave. —_ w3bwt wisn w3vb w3adf w3ckl wiga w3db winz wéapn ve = LV," i » now a limited num witahz wign wtahx w4agr w4ahe wish wisp wtwe wict 7 copies of Bound w4ar w4akv w4kh wd5je wore w5ql woahi woahb w5pg wiix wSbfp w5bsq w5bn w5gz w5aep w7aic w7lp w7abh w7abg \ XIII of QST. Vol. XIII wibb wiaer w7aat w7lz w7acd w7aby wJ7agn wZajn wifh Col ; the entire 1929 series w7gh w7a0 w7a0ct w70m w7pp w7ac w7df w7dd w7sr witx —_ . w7wh w7un wSake wSaxz wSbts wScau wSuk wSbbp wSads t& [his volume is made up wSbek wSwo wSwz wSmb wSckl wSbau wSbsr wSbth wScefv ) books or sections, each wsfz wSiq wSnp wSqm wSapm watz wSduw wSdvt wara = wot wOewx wOdwz wieta wSeru wOdld wOdfq w9dlq w9awn Col ng six issues of QST. wcka w0sk w9si w0sr w9cevn w9bkx w9ebo w9enw wxl ' —~ = w9azq wifigw wObvf wOdli w9gft zl2ab zl2dl zllft vk2kj T aS WS handsomely bound acSag et4ab nninic k6cjs k6avl k6dtg kl pr kipw kihr klee th and with gold imprint. kidj k9pl ctlee em2jt on4pj py lic zllfr oobam acSrv 14,000-ke. band T — volume = priced celah ce2ab ce3ab ce3bf em2co cm2ay em2jt fSct fSfe fStk at post paid. fShm fSjr g2ax g2zp goby g5bq gtirb g5jo lu2ca lus8en ludfk oats pylaw vk2rx vk3bq vk3cx vk3ks xw7eff vk2jy vk4bd B t quickly _ only a few vk3wx vk2ac vk3ep Cot vailable. LA.R.U. News OST (Continued from page 50) Oceania - Australia. 1100-1330. vk3ep, vk2lj. seasonal | i ’ bal = Hartford, Ct. New Zealand. 0400-0600. 1200. 12bx, zllao. seasonal Say You Saw It in QST — It Identifies You and Helps QST

Page 63

the ux hm yim i2al »by 3vp the lasu wify awd sapn wct fsfk u3fk k4bd onal 2bx, Depar F. E. Handy, Communications Manager E. L. Battey, Asst. to Coms. M¢r. 1711 Park St., Hartford, Conn. tment @ N Why Handle Traffic? By R. P. Griffith* In March, 1929, QST we invited contributions on all phases of amateur communication activity, offering prizes for the best article submitted each month during 1929 and selected for publication. By the time this magazine reaches you this contest offe rganization or communication work in these columns deratior COMMUNICATIONS MANAGER vill be drawing to a close. We shail continue to publish the best articles received on any phase of amateur Your contributions are solicited and will receive careful con- E have had two very good articles lately deal- ing with ‘how to handle traffic Speaking from recent experiences and a general view of conditions for the past two years, it seems to me that something should be said on why handle traffic! In the past few days five stations have quit me without a word when I mentioned “QSP?"'; two more politely de- clined and signed off; two others calmly ignored the reference to traffic and went on with the conversation. Let’s give these last all due credit. At least they knew how to rag-chew pleasantly and interestingly What reasons do so many and reporting traffic? | have heard three l amateurs give for not taking I do not have time (2 ‘I sent a message once and never heard from it Messages never get anywhere, so what's the use?"’ ‘Most messages are trivial and unimportant, not wort! sending No one would care whether they got through Now what about this? If an operator act ially doesn't have time to relay and deliver messages he is absolutely right in refusing to accept them, no question about that No one should begrudge him an occasional half hour of en ment of his station on that account. But if we then hear him rag-chewing and report-hunting two or three hours a day for a week, we are obliged to conclude that he sa cheerful prev aricator! The answer to the seco excuse may be found very iickly in the traffic summaries distributed monthly by l These show the total number of messages originated and Headquarters to all Communications Department officia delivered and an average over any considerable period ot time shows that a little better than 85°) of the messages originated are actually delivered. That is not a good answer, but at least it proves that from that standpoint rame is well worth while rhe third objection will bear study from several different angles. Anyone who has run through a file of two or three hundred amateur messages will admit that, at first glance there is some truth in the charge. Again, looking over a box of letters I have from men and women all over this part of Iowa gratefully acknowledging receipt of messages I have mailed to them, would lead to a different conclusion The most trivial birthday greeting or other remark of apparent unimportance may be linked with some incident or association known only to the sender and the recipient which gives the communication a different meaning and importance to these persons. * A.R.R.L. Route Manager, W9EJQ, Goldfield, lowa 1 Six traffic summaries taken at random in the past year show the average number of stations handling and reporting traffic out of nearly 19,000 licensed (approximately), as but 548 or less than 3% QST FOR JANUARY, 1930 Finally, and here is the main point, traffic handling is more nearly like commercial or military operating than any other activity we engage in. It is the best preparation for being useful to the community or the nation in an emergency. The rag-chewer does not attempt to copy one word in twenty that he hears. Many do not copy at all. Such an operator does not need or develop strict accuracy. He has a fair idea of what the other man will be talking about and if he misses a word or two he fills it in mentally from the general trend of the sentence, just as we do in ordinary conversation on the street. Put him to making vctual copy and the chances are a dozen to one the act of writing would distract his attention from the code, the copy would be poor, and he would be a total loss. ‘* Guess- ing" habits on the part of an operator lead to serious garbling and errors in messages which cannot be tolerated. When messages are relayed through several stations with such operators the errors are cumulative. Accuracy is a prime requisite of the real operator! Ihe rag-chewer would be a total loss without considerable training to correct his faults. Not so the traffic man. If in operator can receive, copy and relay a message with preamble, address, and signature correctly, he can just as easily do the same with a message that will set an army in motion, recall a fleet or reassure some family of individual or group salety alter an earthquake or other community disaster. If the process of handling a message one hundred to three hundred times a month for a year or two, and carried on the work carefully, accurately and honestly, he will have equired a degree of confidence in operating which alone will make him a valuable help when help is needed in emergency. He will also have given the same training in carefulness and proficiency to a number of other operators For this purpose the worthwhileness of the messages does not matter in the least but only the spirit n which the operators play the game Who owns the air anyway? Risking disagreement with . few amateurs, I must say emphatically that we don’t! Neither do the broadcasters, or the ship stations, or any commercial communications organizations. Who, then? The hole people, of course! And our government, acting us guardian of the property of the people, and as the agent of the people in portioning out radio communication channels to those who desire to use them, logically enough, can be guided by one consideration only. Service. Public interest, convenience or necessity. This is right, just, and I believe exactly as it should be 4 number of the gang have found fault with our repre- sentation in the Washington Convention, claiming that our representatives were not insistent or energetic enough in defending our alleged “‘rights.’’ Good Lord! What did you I

Page 64

ree per cent record * of service! ur stations operating solely for tically refusing to engage in the ves contact with, and gets the e owners of this air we use. The useful service to others in normal best prepares us to give service in itional, is message handling. What If they had been backed by a real . host of loyal friends and boosters munity in our country, perhaps i. different story to tell. It is worthy e of the Washington Convention was being handled on the 3500-ke ls in common use, that one alone tation is to communicate. That d. A radio station that never ible to a basket-ball team that where the figure of three per cent is However, it might be observed that not t any one time. It is estimated that not f the licensed stations get on the air at r the season of greatest activity. It lers if we state that at the peak of the March) a maximum of 1000 stations « work each month, which falls to slightly the months of Junc and July, after which n to increase steadily and substantially wry. The number of stations reporting uded of course. Using the 40% factor f 750 reports listing traffic, the “three the text becomes approximately ten VS and the Army Amateur Net organiza- ntion and offer amateurs an opportunity t tactical procedure, to exercise the skill ! ] handling messages, to participate 1 thus assist us to be fully organized nd all emergencies of any kind, if we E.H New Year’s Resolutions in Order Y WENTY-NINE has passed in review N heck up and take account of stock - ent to examine present operating le to see more clearly just where we May correct our course and steer ection for the good of all concerned vands in which we operate to-day rly satisfactory operation of many odern amateur construction to make it possible for us f selfish or careless individuals who r share of the ether, and especially r the January and February tests ll be on the air than at any other due to carelessness and lack of ve controlled by public opinion lual criticism. If not so controlled, » bring about corrective regula- be necessary. A spirit of willing- in active desire to help others restions tactfully made should go situations that arise. What 1djust and operate his station in f his signals? experience to try to copy a DX he next district open up with his half the band. Lengthy test and ( the rule. A.c. and r.a.c. notes are too id. The Q Code is still misused hough we see some steady im- T is transmissions and inexcusably . 0- and 60-cycle signals do clutter still bring answers from other illed, not to mention the time plies. These criticisms and claims ils are more in vogue than they f the spark coil appear in QTC, the reless Institute of Australia and in the e R.S.G.B. as well, and that they U. 8. and Canadian amateur sta- ud goes without saying. Sit down ind attempt to log a good number of “high quality signals” for the column of QST and let us know what you hear The off-frequency situation is one that needs individual attention, too. There is no excuse for any off-frequency work and unless watched by all, amateur radio will pay the penalty. It is hoped that all who read this article may be both frank and tactful in suggesting improvement where they see this possible in the signals worked. Operating practices need as direct attention as station adjustment. C. D. officials, affiliated club organizations and holders of ORS appoint- ments are intrusted with the responsibility of setting the pace. You who read these columns can exert a tremendous influence by lending your weight to a movement for better conditions, uniform operating practices and the like. You and I should look ourselves over carefully, revamping sta- tions not in line with the best modern practice, learning and using the new Q Code and miscellaneous abbreviations where these have not already been put into effect at our stations. We must make a special effort to keep our stations in the lead and to set the right kind of examples in all we may do. This cannot but have a powerful effect in improving operating conditions. It will not only keep us in the lead but also will raise the standing of the whole amateur fraternity. F.ELH Traffic Briefs WI1ANH at Washburn, Maine, is the most northern radio station in the United States! Cupid shoots his arrows very straight and with wisdom these days. He has recently united WIAEQ and YL W108; and W6DOB and YL W6AET. There should be perfect harmony (at least in radio matters) in these families. Hi W1BW is also one of our “newly-weds."’ Hong Kong amateurs are now licensed with prefix VS They cannot handle messages. The Miami Amateur Radio Club extends a cordial invi- tation to all hams who visit Miami or vicinity this winter to get in touch with the secretary, EF. D. Miller, 759 N. E 68th Street, Miami, and take in one of their meetings Stations operating in the 7-mc. band having traffic for WI1MK to QSP to Europe or the Philippines should, rather than hold it until they are able to Q8O W1IMK, try to pass it to some station that W1MK schedules or to some station in the direction of Hartford. Because of the heavy QRM on 7 me. W1MK’s schedules many times run over the allotted time, aud, therefore, a comparatively small period is left for “general operation.”’ 3.5-me. traffic comes through okay W1XXX has at last found an “ideal’’ BCL environment! His mother recently made a social call on Mrs. BCL, living in the apartment on the floor below the ham station. The conversation jumped from one thing to another (as it some- times does) and finally a discussion of radio came up. The BCL asked W1XXX’s mother if she had a radio. The an- swer was, “No. But my son has a sending set.’’ “Oh! came a startled reply, * Has he got one of those? I'm so sorry I'll bet we interfere terribly with his work. We must be careful not to use our radio so much."’ Hi Hi. (This is 8 true story ham's name on request ELB WS8CEO says: Prospective hams or new hams whose calls are not listed in call books and who desire to join in radio gatherings should send their names, addresses and calls to the secretary of their local club. There is little way to lor cate new fellows except when they come forward The U. 8. Prohibition Service is installing two short wave shore stations and three patrol boat stations in Porto Rico. These are expected to be in operation about January 15th and will use both telephone and telegraph on frequencies of 4205 and 3385 ke. The call letters will be as follows: NUXB, NUSJ, NUXP, NUXS and NUXZ. Amateurs are requested to listen for these stations and, if possible, communicate with them and give reports. QST FOR JANUARY, 1930 Brit has ke port Edv Eng stat) whe ong all b was the : sucet W7E HA RADI some 1 Ameri he erp The radio States relayt n apprec: has be Chicags certain layed t Test is W6AK ftom id 3 heve! Male ind ask ESSA ge the fact fights c LAI( 2 spite 2 was Was car handled a Octol the seas, contacts Walla if Long OST.

Page 65

om )S; ‘ect Hi vie rto fc r her pass Lion | on ted left ugh ent! ying The me- The an- yh!” Wry t be is a calls adio is to » lor yave t1¢0. 15th aol sted cate EXPEDITIONS The Oxford University Exploration Expedition VP5O0U X) has been located at Moraballi Camp, Essequibo, British Guiana, 8. A. The operator, Mr. M. G has been working on 14,000 ke. for DX contact and 7000 ke. for contact with the survey party which has a 10-watt portable set. Reports on VP5OUX should be sent to Mr. Edwards, G6XJ, Wellhead Lane, Perry Barr, Birmingham, England Creswell Potter of W6AKW i All-American Lyric Malaysian Expedition, when the field set was being used to contact VS3AB at Singapore. Operator Wells of PMZ experienced trouble with all but the louder stations during the QRN season, but he was successful in contacting W7ABH, November 18th, and the schedules with Foster of W6HM have been maintained successfully, Mondays, throughout the trip. Stevens, W7BB, contacted PMZ several times. The base station (PMZ, Peoroek Tjahoe on the Barito River of Bandjer- masin, 20 miles south of the equator) worked on 7340 kc.. the complete set up including telescoping mast, gas engine and generator, weighing less than 200 pounds. A report from operator Wells, ex-W3ZD, relayed by W6AKW and WSCNR, follows: ‘When Potter copied our portable set the input was less than 714 watts, and the antenna was a poor affair draped about on cocoanut palms. Needless to On one occasion heard PMZ, the station of the say, the cobperation of fellow hams has been great, and it's HARRY W RADIO WELLS, RESEARCH ENGINEER some natives, Radio Relay League jo-watt station The emblem has been carried into new territory insofar as CHEVY CHASE, MD., AND with the party, with portable radio equipment and a silk flag of the with PMZ the call letters of American the erpedition’s short wat United party by radio is concerned. Amateurs in States and other lands with the and the work of our operators is deeply R. Potter of WEAKW., Lancaster, Calif., all parts of the have codperated rlaying messages appreciated L has been the principal contact between the party and the Chicago } eadquart rs rtainly appreciated. The bulk of the traffic has been re- layed to KIAF, and by that station to W6AKW, but the test is sent directly to the states through schedules with WEAKW, W6AM and W6HM. Cx here are far ftom ideal as the moisture ruins equipment and the static $nhever ending.”’ ynditions WFA Maleolm P. Hanson sends from Antarctica ind asks us to explain to all who have been looking for a greetings message that operation has been somewhat limited, due to the fact that the gasoline required for airplane exploration lights comes before that allotted to the radio station LAIG contacted WFA some time ago, and was copied OK Xspite of some QRM from the gas engine. Operator Peter- 2 was at the key of WFA, and a jolly chat in Norwegian was carried on for a half hour in addition to the traffic tandied. LAIG worked WFA on the 14,000-ke. band and 2 October, quite exceptional work with the antipodes for he season. W7BB, W2QU and WICIO reported interesting entacts and traffic handling with WFA Wallace of W6AM took a message from the “Junior Sun” if Long Beach, to Scout Paul A. Siple, special assistant and QST FOR JANUARY, 1930 orderly to Commander Byrd on the South Pole expedition also of about fifty words, in just eleven minutes! What wouldn't we have thought about a record like that a few years ago? transmitting the radiogram, and receiving the reply, 28 Me. Atwater of W2JN reports that signals have been slow in iround the first part of October. The supposition voiced by Dr. Taylor of the Naval Research Lab to the effect that we are on the downhill side of the cycle of good high frequency transmission seems to be a correct one if we can judge by the length of time it has taken 28 me. to come to life this fall! Schedules W2ACN and W2JN have had with PY1AA of Rio have not yet resulted in two-way contact. which PY1AA has not been heard, although he reports hearing W9EF, NKF and W2JN this summer, monics of WIK and WKI D4YT of Germany recep- tion comes from ZT6C of Johannesburg, South Africa, who heard W2JN working W2ACN at 1545 GCT, October 13, 1929. ZT6C was heard calling W2JN at this time by G6LL of London. This reception of a W station by a South African marks just a year from the time ASV (now ZS4N) of Durban heard W2JN at 1540, October 14, 1928. A later report from ZT6C states that he also heard W2AQB. Signals heard or worked are as follows: November 10, 1929, W2JN worked G2OD 1624 to 1655 GCT, Maximum strength r7 both ends. G2OD heard W2NM at 1705. W9CVN heard r7 by W2JN from 1730 until 2200. W5BIL heard at W2JN r7 at 1735. VE4GQ heard at W2JN r9 at 1800. VE4BQ heard by W2JN r6 at 2053. Reception of the above W and VE stations is probably their second harmonic. ZT6C heard W2JN from 1600 to 1700. November 17th: G5WK heard r5 calling W2NM at 1515. W2JN worked G6LL at 1550, but it was an unsatisfactory QSO as G6LL soon faded out. G6LL was heard at W2NM. W2JN worked G20D at 1600 and was also heard by GSBY. G2OD heard at W2ACN.,. VE4GO heard working WSCPC at 1740 on second harmonic. Approximate frequencies of the above stations are as follows 20D ex lc. 28390 ke.;: W2ACN e.e. dic. 28410 ke.; W2NM e.c. d.c. 28300 ke.; W2JN e.c. dic. 28400 ke A list of 28 mec. stations heard or worked by W2JN be- 1928 and March 31, 1929 follows as well as the har- PY1AA has been heard r8 by An interesting report of 28-me tween September 30, W5AEC, W5A0OT, W50OH, WS5TP, (W5WZ), (W5YG), W6AM), W6BAX, W6CZA, W6UF, W9AKM, W9DKM, W9EVC, PCRR, WGT, (K4AGF), VE4GO, (G6LL), EO17C), (G2FN), G6DH, G2KF, K4SA, (EFSCT), G6YQ GS5ML), (G5VL), VE4GQ, G5YK, (G6HP), G20D E18B), (G6C1 The antenna for 28-mc. operation is a 7/2 wave horizontal wire, 10 meters in height, and runs between garage and house nan east by west direction. It is excited at the westerly end by a '4 wave zeppelin feed line. The receiving aerial is a wire about 70 feet long located on top of house and running in a north by south direction G5BY contacted W2JN on 28 me., Sunday, December Ist, it 1400 Greenwich, reporting signals QSA5 R6 and receiving an excellent report himself. W2NM was also heard by G5BY. G5BY may be found on 28,384 ke. each Saturday and Sunday, 1400 until 1700 Greenwich, and glad to QSO any- one. Several U. S. A. stations were also heard on December Ist by G5ML, who reported to W2RR, word being received via WSKR and WI1UE. The best heard were between 1200 and 1700 Greenwich, W2JN R 8, W2AQB RS and W2NM Traffic Briefs WSHD and W9ERU are now holders of Extra First Class Amateur Operators tickets! These licenses permit their owners to use the new 14,100- to 14,300-ke. amateur ‘phone band after special application has been made to the Radio Supervisor. Non-holders of these licenses wishing to use this new band must present an application showing special technical qualifications and ability to operate within the prescribed limits. Those interested in 14-me. ‘phone are urged to get their Extra Firsts before making application for the ‘phone privilege to their Radio Supervisor. III

Page 66

lraffic Briefs OST The International rd to for a long time roing in first-class shape in ham Chis year I am going to try 14,000-ke Chis is but one example of the enthu- Imost all the early entries. Don't for- SL-entry card in early for the February ternational Relay Competition. Only U. 8. and Canada whose entries are will be able to take I received the Tests is what I for December During the last r participate I to use the band exclu January, eepstakes Contest will be held January e. The Third International Relay iled to take place February 15 to e. Remember those dates. Read de- ssue, and follow the rules set forth in el hese contests have a number of They promote national and interna- good will in addition to making possi- nd a pile of new records for every sta- Get on the air and plan to participate as Whether your score be large or small, be full credit to everyone may appear in tant to boost the standing of your he February tests, make sure of get- ent sheet in time, by sending which foreign localities can Canadian amateurs dur- to see tes and (b February Contact Contest ere are requested to pay no attention to ng outside amateur frequency bands log these for checking in confirmation n Convention, ercept to gs. This request goes for both the petitions SI rds comes from W4AIQ. He uses ird attached. That's about the ve heard of. All he has to do is fill e card in the mail. FB! Among the amateurs in the U. & foreign countries is W4AIQ at h 1 card, if interested Department was indirect] - ber 19 when CM Handy was s second, by the way ('on- se ops will be able to keep H e that the Pacifie Divis I . ve months? Wake ft handling game t Prehistoric Signals have e us wonder if the gang is aware of expensive of apparatus ts NG te unless it is intelligent] ry realistic happening during one DT. In the middle of the QSO 1, while I kill a spider. He's a big er the railing."’ W4HY says he etually hear WSBDT hit that w close to the other fellow we Lost be vhy your station is never mentioned rt It would be, if you sent your Manager an account_of your ac- Reports should be mailed to the SCM } ng month, /éth through the 15t/ HCI1FG says that foreign sta- with one another never t A tip for the DX man tions have an understanding answer a U.S. station's CQ, as it is useless due to the heavy QRM in the United States. This is particularly true on 7000-ke. Let's not waste too much time with our lengthy DX CQs } WSCFR has a daily schedule with WFA A route is being worked out to speed up west-to-east traffic. It is hoped that when plans are completed and schedules are functioning properly traffic leaving the west coast at 6 a.m. will reach the east by afternoon. The stations on the route at present are W6ACJ, W5AHI, W9FKD, W9AP, WSBAU and W1ZA. A couple mofe stations are needed east of Kansas, and W5AHI or W6ACJ would be glad to hear from anyone interested Genus BCLus rhe following is taken from a ‘phone man’s host of ex- periences with BCLs. W2ACG had a good ‘phone outfit, « good in fact that it covered a multitude of bands the ‘phone band, the broadcast band, and the ship band. Hi One night while he was adjusting a wave trap in a neighbor- ing apartment house (one of those dwellings that hams swear at, not by), W2BN was modulating W2ACG's carrier by shouting into the mike. Everything was going fine when W2BN did a most undiplomatic stunt — in his Sunday-best style he requested all BCLs hearing the transmission in their receivers to coéperate by calling W2ACG on Bell telephone!! Several bona fide complaints came in that required all the ‘salve’’ W2ACG could disseminate. Hi. Later the ‘phone rang again, and after much trouble it was finally gleaned that a town in New Hampshire (near the Canadian border was calling. After the telephone operator had been con- vinced that W2ACG wouldn't pay the charges, she informed him that by not connecting him with the fellow at the other end, the charge would be only 35 cents, a mere report charge By this time the operator was getting quite sociable and was willing to QSP the dope the fellow had for W2ACG. He wanted to report that W2ACG was coming through up there! According to the operator, he was the favorite son and radio expert of the town. Hearing W2ACG must be the same to him as hearing WFAT R® would be to most ama- teurs. Hi tlbert Reiss, W2BN Official Broadcasting Station WSC EO has adopted a new method of sending the broadcasts, which other OBS could message is sent twice, first at 2 words per minute for the advanced amateur, and then at 10 it the higher speed : very effectively follow. The w. p.m. for those who beginners who wish to use the broadcast for code practice rhis procedure is carried out at promptly 7 p.m. E.S.1 Monday, Wednesday and Friday nights on 3705 ke. Begin WSCEKEO! cannot copy ners especially are urged to watch for No one will dispute the statement that QRM is fierce T7000 ke find a clear spot, and that band is gradually becoming more crowded. But what of 14,000 ke That band isn’t used any- where near as much as it should be! We have 400 ke. in the 14,000-ke. band 100 good kilocycles just waiting around for us to use them!! If you don’t believe this, listen on that It is an excellent band for DX and long-hop open spaces of 14,000 Many fellows are moving to 3500 ke. in an effortt band some time traffic handling. Get down in the wide ke. and give it a try! rhe revised edition of the “ Rules and Regulations” of the Communications Department is now ready. If you can uses copy, drop us a line. All O.R.S. will receive a copy with the next bulletin We recently caught a well-known brass pounder keeping his Tuesday schedules on Wednesday! And he kicked be cause the “fellows don't keep their schedules." We hope this isn’t a habit with brass pounders!! Hi QST FOR JANUARY, 199 on the (6th of each month, covering activity for the preced- col the I three Bann total stand print will ¢ head accore quart; eral oO Teport W3B\ his saf st ip’s person the di scienti disaste and w anOW | then Heady Carnes Dur W7LZ positio Wé6l sched u! This i Toute {: OST

Page 67

sta- eavy e on gthy -east and west tions ‘KD, s are ld be i @x- it, x the |. Hi hbor- hams rrier when -best their one!! ll the phone ~aned rder con- rmed other arge > and +. He h up e son ye the ama- se 8 h the eping d be e this Trafic Summaries OCTOBER-NOVEMBER Pacific led by East Bay 11,269 Central led by Ohio 5934 New England led by Eastern Massachusetts 5568 Atlantic led by Eastern Pennsylvania $344 Hudson led by New York City and Long Island 3888 Midwest led by Missour 3174 West Gulf led by Northern Texas 1954 Northwestern led by Oregon 1508 Roanoke led by Virginia 1099 Southeastern led by Florida 1063 Dakota led by Southern Minnesota 1022 Delta led by Louisiana 838 Quebe« 293 Rocky Mountain led by Colorado 255 Ontario 148 Prairie led by Saskatchewan 101 Vanalta led by British Columbia 37 686 stations originated 10,317; delivered 8138; relayed 23,141; total 42,495 (80.5°> del Pacific Division leads the fic Banne Section in the The East Bay untry this month and takes the 7 away fron the Los Angeles Section, after the latter had carried it for three consecutive months! Good work, East Bay! This Banner will go 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 What place does yours take? What Section ind help their Division printed above will carry the banner next month head the list YACHT “CARNEGIE” BURNED The n-magnetic ship ¢ better known to ama- teurs as WSBS, is no more, and her three-year cruise of vestigation has been brought to an unexpected termina We understand that while the Ca was at anchor nthe harbor at Apia on November 30th, loading gasoline an unfortunate explosion occurred, the fire resulting sweep- ng quickly through the wooden vessel and spreading to five other craft, which were also destroyed. The explosion ording to early : y blew Captain Ault from the quarter deck into the water ind resulted in his death. Sev- reports eral other members of the crew were injured and one was reported missing. Since the radi W3BWI } o operator, Stuart Seaton of t listed among those injured we may assume is m is safety. The fire spre id so rapidly that only the cash and ship's books were saved. The Carnegie carried twenty-five persons. The U.S.S. Ontar sixty miles from the scene of the disaster, was instructed to proceed to the rescue of the scientific party. Our sympathies are deeply stirred by this disaster, which removes one ot! the expeditions I our list, und which concerns a group of individuals we had come to ies to be of service in keeping contact with friends, and with t Department of Terrestrial of Washingtor know through our opportunit expediti ns M iznetist er n 1e Heady larters the Carnegie Institute W6AYE ind WSBS, giving us the During October and November, VE4IH W7LZ re Osi t of the ¢ eon each occasion porte i their contacts wit! W6DE at Culver City, California schedule with LUSEN at Buenos This is a reliable daily schedule and Toute { South American traffic QST FOR JANUARY, 1930 requests tr iffie for his Aires, South America should be an excellent BRASS POUNDERS’ LEAGUE Call Orig. Del. Rel Total W3ZI 1675 1 2 1681 W6AD 113 304 796 1213 W2CXL 71 491 461 1023 W6TM 139 288 398 5 W2AVR-2ARM 14 8 764 5 KAIHR 255 174 340 9 WIMK 97 110 538 WIBIL 26 42 574 W6IP 116 112 392 W6ALX 26 45 548 W3BW'I 182 75 204 W6AKW 35 37 452 WIAMI 23 17 462 KAIDJ 379 72 18 Ww9scos 65 217 166 Ww60T 414 WSDYH 31 52 319 W5HY 200 183 18 WSCNO 38 21 316 W3ARI 67 257 41 KAIAI 180 40) 114 W6EIB 10 14 300 W6CGM 46 141 132 W6ss 311 WS9DLD 40 39 238 WIIP 18 29 254 W6AMW 14 27 254 WICMZ 31 40 220 WSCUG 8 26 253 WSCRI 74 16 185 W6BTZ 27 $3 184 WIBFT 27 30 96 WIACH 68 80 102 W9DXY 15 ; 230 WIUE 39 15 157 WO5F« 19 39 182 W2CUFI 0) 24 186 W2AFV 7 70 157 W9EIQ 19 25 190 W5AQY 116 71 16 W6ATT 35 10 186 W9CET 21 17 188 W9FKD 12 21 191 W6CBW 12 69 138 WSLT 75 6 107 WSAEQ 0 24 164 WIQH 21 4 190 WIBBZ 214 WILQ 49 71 90 W2at 42 86 78 W7HP aa) 20 158 W2APV 63 139 W9ZZ ) 192 4 WIZA 87 9 105 W6ERK 21 57 120 WIAFB 16 4 92 W6BIP 3S S5 W6ASH 17 102 WSCFR $1 19 W6ETA 21 76 W2AVP 68 WOBKI 33 td) W6EPZ 13 72 W2JI 20 24 WYBCA 27 W7BB 7 Ss WO5RJ 27 ) 12 W9EFX 14 59 13 The several amateur stations responsible for the best fie work the ones that are “setting the pace”’ in worthwhile traffic handling are listed right up near the top of our B.P.L., the figures giving the exact stand- ing of each station accurately All these stations appearing in the Brass Pounders’ League are noted for their consistent schedule-keeping ind dependable message-handling work in amateur radio. Special credit should be given to the following stations (in the order listed) responsible for orer one hundred deliveries in the message month: W2CXL, W6AD, W6TM, W3ARU, W9COS, W9ZZ, WS5HY, KAIHR, W6CGM, W2APV, W6IP, WIMK, WSCFR. Deliveries count! A total of 200 or more bona fide messages handled and counted in accordance with 4.R.R.L. practice, or just 50 or more deliveries will put ou in line for a place in the B.P.L. Why not make more chedules with the reliable stations you hear and take steps to handle the traffic that will qualify you for B.P.L. membership also! Army-Amateur Notes Armistice Day Test Me S. Gibbs, Chief Signal Officier of the m W2CXI “HI was transmitted fri ssage from Major-General Army, at various times dur- 3500- and ng the evening of November 11 on both the 7000-ke. | The text of the message is given herewith the ma yn of those interested The past vear has seen the wards the pertection of Army-Amateur system mak- i nationwide ama- V

Page 68

= means of this svster the disaster produc ing causes may be providing emergency means of nd relief to be promptly fur- tizens of your community nor my- that vour personal efforts and nearer the day when an Armistice powerful natural elements that en- s and prosperity of our country Captain J. C. Platt, Jr., 8. ¢ teur Radio System, First Corps the rank of Major. Major Platt for the First Corps Area \: Stations are now fully orgar ire functioning very well. Proce- W2PF each Monday at 8:30 p.n econd Corps Area A-A stations Amateur stations in this Area message. The West Virginia net is the out- . having practically 100% repre- WSOK is the NCS. The Ohio ng each Monday. The Kentucky reorganized. Ohio, West Virgin excellent results on the Armistice ‘-WSZG has been assigned the call frequency of 6990 ke Many stations copied the Armi DLI copied it on a portable. W6UO th W6EDK. W6EAF, W6BAJ e working regularly W6DFR W6EDK 25. Stations desiring t: W6DFR for application blanks INNERS, ATTENTION! tter for the 3500-, 7OO0- ar was published in December QST lesigned especially for men wh mateur radio, and is an ex- how to build a simple receiver bands appe ired November receiving code transmissions ¢ nged for your benefit. A list it are sending code practice ur espec ail benefit was pr nted ire no changes in the list this 2s changed his hours to 9-10 necessary to discontinue e stations sending code practice 1 will drop us a line. The Radio s useful suggestions for learn er information that you would iests for any information vou the Communications Depart- est to help you WI1MK Station WIMK operates on 17150 ke. Robert B. Parmenter his fist is familiar to most of wionally other members of the t WIMK. Their personal signs fQS7 ~ection schedules Eastern Standard PECIAL BROADCASTS 150 at the Thu 1 Fy 1 snd Thur V periods have been arranged municate with A.R.R.I periods have been arranged so i broadcast. They are listed 00 ke. and 7000 ke.; to indicate ted to listening on the 80-meter Sun.. Mon Tues., Thurs., 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 day morning 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 on the morning 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 A.R.R.L. Headquarters, on 3500 ke.: WIACH, WIKY, WIVB, WIWV, W1ZA, W2JF, W3BWT, W3SN, VE3BC VE3DA, VE3ET, WSAAG, WSCUG, WSHL, WSJD VE9AL, W9APY, W9BLL, W9OX; on 7000 ke.: W6AKW W6CIS, W6TM and W9QPF. Official Broadcasting Stations CHANGES AND ADDITIONS Local Standard Time) W2PF (3876), Wed., 10:30 p.m.; K4KD (approx. 7050 Tues Phurs., 10:30 p.m W5AED (7100), Mon lhurs 10:15 p.m., Tues., Fr 1:45 p.m.; W5AHB, Mon., Tues Wed., 12:30 p.m.; W7AAT-QT (7040), daily except Sun 3:30) p.m W7FL 3571.4 rues Thurs., midnight 7142.8), Mon., Wed., Fri., 6:15 p.m 14,285.7), Sun 3:00 p.m. (3540 phone , Sun., 6:15 p.m.; WSCEO (3725). Mon Wed., Fr 7:00 p.m.; WSCRA (14,050), Sun. 6:00 ar Sun., Mor Tues., Sat. 5:30 p.m. (28,000), Sun. 2:30 p.1 wae JQ {O60 Mon. Fr 7:00) pa WO9CTW (7175 Mon., Wed., Fr 1:00 p.m.; WYDXZ (3740 ce.), Mor Wed., 7:30 p.m High Quality Signals 3500-ke. band: WIAOI**, WI1CCZ, WICGR, W1CQR W1MK****, WINV, WIVB, W1ZA, W2ACB, W2AEI W2AG****, W2AIZ, W2AOS, W2ATT, W2BLF, W2BRH W2BY0O, W2CLA, W2CXL*, W2DV**, W2DW, W2EC W2GV, W2LU*, W2O0P*, W2PF*, W2SC, W3ARI W3AWQ, W3BWT*, W3DH, W3MA, W3MI, W3Q\ W3RO, W3VM, W3ZV, W4AHP, W4AIW, W4ALD* W4JR, W4KV, W4LM, W40C*, W5APG*, WSAAQ WSAIH, WSAQ, WSARC, WSARX*, WSASZ, WSATD, WSAX, WSAYB, WSBFG, WSBRO, WSBSY, WSCEO WSCEP*, WSCMP (c.c.)**, WSCNO, W8SCR**, WSCUG* WSDAQ**, WSDED, WSDF, WSDSS (ce.c.), WSDXP WSDYH, WSGI, WSHD, WSHL* (c.c.), W8SKR, W8QN WSWJ, WSWO, WS8ZZ, W9AHK, W9ANR, W9AZN W9BKJ**, W9CAA, W9CYQ**, W9DLD**, W9IDLQ W9DSC, W9DXZ, W9EBO*, W9EHD, W9ERU*, W9FUD W9GBF, W9GCL, W9OX*, W9VD, W9YI, VESDC 7000-ke. band: W1AQ, WIAWL, WIBWA, WIID* WIMK*, W2A0J, W2APQ, W2BFF, W2BFI, W2F! W2HP, W2JN, W2MK, W2PX, W2UP, W3ADO* W3AFR, W3AFT, W3ANF, W3ANH, W3ASG, W3LA W3WZ, W4AGR, W4AHL, W4AKT, W4EI*, W4HE W4WS W5AFI, W5AFX, W5BAT*, W5EB, W5HY W5SV, W6AJP, W6AKW, W6AM, W6BAU, W6BQP, W6CAR, W6CAT, W6CDU, W6DI, W6DLI, W6DZJ, W6EGX, W6EOP, W7UJ, WSADE, WSADU, WSAFM, WSALH, WSALU, WSANN, WSAU, WSBAU, WSBBR WSBCQ, WSBNE*, WSBRS*, WSBTI, WSCHI, WSCHO WSCNO*, WSCTJ, WSCUT, WSDLD, WS8EM, WSEZ, W8GZ (7200) WSLT******, WSNP, WSPL, W9AHQ W9AQS, W9ARA*, W9BEZ**, W9BNZ, W9BPB W9BVH*, W9CIW*, W9CTW**, W9CVM, W9CVN* W9CWI*, W9DGH, W9DIH*, W9DLI, W9DQP, W9DWI W9DXP** (7090), W9DZM, W9EAG, W9EAS, W9EBO, W9EGF*, W9EGU*, W9EHO*, W9EXW, WSFiL, W9FSE, W9FVI*, W9GAR, W9GCP, W9GUG, W9LT*, W9MQ, W9MR, W9GF, W9YC, VE2CA*, WYF 14,000-ke. band: WIAYG, WIBIL, W1BMC, WIBR, WICJC, W1DP, WiFC, W1MK, W1MS, W2ABV, W2BJ, W2BQU, W2FP, W2FL, W2MB, W3AAZ*, W3ACH W3IC, W3JM, W4AKH**, W4NN, W5AAK, W5QU, W7ED, W7EK, WSDRJ, WS8FZ, W8RH, WSUL, W9AWI, W9BWV, W9CPS, W9DDY, W9EF, VEIBR, VE2AC, VE2AS, VE2BD, VE2BE, VE3ET, PY1AH, X9A. QST FOR JANUARY, 193) Mar hom as my shou Mr is el N shou Reic petit date Sask Mar Albe Quel D Albe VE2 his s the Sect! ALR ary ; dire: 8 ele Toa l A.R two- Qs

Page 69

nN aly urs., "ede ons KY BC JD (Ww AQ rD G* XP YN LN LQ UD 0), WiMK, W3U0, W2AG, W7EK, W2A08, WsANX Well-operated stations W2CLA, W2CXL, W3MI, WSDYH, WSVZ, W9CYQ Good 3500-ke. phone: W2FR, W2GJ, W3AEX, W3AIN W4QZ, WSAJH, WSRD, WSWF, W9BJW, W9MM historic signals: W2AGX, W2BOX, W2BVJ, W3IlI W3RJ, W3U0, W4AHN, W4AIW, W4FT, WO6CXY\ WSDPD, WSRS, WSSB, W9SDRE, WSUS, Nort The stars indicate the number of extra times ELECTION NOTICES 7 1 A.R.RL. Members res ng in the Secti« listed bel The gives the Sections, closing date for receipt of natir petitions for Section Manager, the name of the present incumbent and the date of expiration of his term f office Phis notice supersedes previous notices In cases where no valid nominating petitions have been received from A.R.R.I sect members residing in the different 8 In response to our previous notices, the closing dates [or receipt ol nominating petitions are set ahead to the lates given herewith. In the absence of nominating petitions from Members of a Section, the present incumbent con- tinues to hold his official position and carry on the work f the Section subject, of course, to the filing of proper nominating petitions and the holding of an election by ullot or as may be necessary. Petitions must be in Hartford or before noon of the dates specified, all of which are 1930 Present Tern Sect f Dat Present SCM Office I WwW. \ Jan. 21, 1930 Revnelds Dx 20, 1931 resigned Vevad Jan. 21,1930 C. B. Newcombe Sept. 15, 1928 n Jan. 21, 1930 J. F. Wohblford De 1O28 lennessee Jan. 21, 1930 Polk Perdue Oet 2 30 resigned Montana J 21, 1930 O. W. Viers Nov », 1929 East Bay } 21,1930 J. W. Frates Feb S, 1930 Northern Texas Jan. 21. 1930 J. H. Robinson Mar > 1020 Alaska Jan. 21,1930 W. B. Wilson Mar. 28, 1930 Hawaii Jan. 21, 1930 F. L. Fullaw J 7. 1930 Louisiana Jan. 21,1930 M. M. Hill De 20, 1920 } resigned Due to the resignation of Mr. Polk Perdue, W4F1 the Tennessee Sectior Nir F. D Reynolds, WSVZ nm the W. Va. Section, and of Mr. M. M. Hill, W5EB, in the Louisiana Section, effective at once, nominating petitions re hereby solicited for the office of Section Communications Manager in these Sections, and the closing date for re« eipt of nominations at A.R.R.L. Headquarters is herewith specified as noon, January 21, 1930. Reports from ORS in Tennesse« should be sent to the Acting SCM listed on page 3 of QST Mr. Hill will handle the work in his Section until a successor is elected CANADA Nominating petitions for Section Managers in Canada should be addressed to Canadian General Manager Alex Reid, 169 Logan Ave., St. Lambert, Quebec. To be valid, petitions must be filed with him on or before the closing dates named Saskatchewan Jan. 21, 1930 W. J. Pickering De 2, 1928 Maritimes Jan. 21. 1930 Alberta Jan. 21, 1930 E. J. Taylor Mar. 28, 1930 resigned Quebe Jan. 21,1930 Alex Reid Sept. 15, 1930 resigned Due t« the resignation of Mr. E. J Taylor, VE4HA nthe Alberta Section, effective at once, and Mr. Alex Reid VE2BI Ms successor, nominating petitions are hereby solicited for the office of Section Communications Manager in these in the Quebec Section, effective with the election of Sections, and the closing date for receipt of nominations at A.R.R.L. Headquarters is herewith specified as noon, Janu- ary 21, 1930. Reports from ORS in Alberta should be sent direct to the Canadian General Manager until a new SCM 8 elected To all A.R.R.L. Members residing in the Sections liste l. Yo A.R.R.L. Section Communications Manager, for the next two-year term of office is about to be held in each of these 1 are hereby notified that an election for an QST FOR JANUARY, 1930 Sections in accordance with the provision f By-law 6, 7 and 8 2 The elections will take pla € n the different Sections the closing date for receipt of nominating petitions as given opposite the different Sections The Bal- mmediately after lots mailed from Headquarters will list the names of a eligible candidates nominated for the position by A.R.R.L. members residing in the Sections concerned. 3. Nominating petitions from the Sections named are ing in hereby solicited. Five or more A.R.R.L. members resi Section have the privilege of nominating any member of the League who holds an O.R.S. appointment in their Sec- tion as candidate for Section Manager. The following form for nomination is suggested Place and date Communications Manager, A.R.R.1 1711 Park St., Hartford, Con: We, the undersigned members of the A.R.R.L. residing in the Section of the Division hereby nominate 1s candidate for Section Communications Manager for this Section for the rext two-year term of office Five or more signatures of A.R.R.L. members are re- juired The candidate and five or re signers must be League embers in good standing and the « indidate must be the yualified holder of a Communications Department, Official Relay Station appointment or the petition will be thrown it as invalid. The cor iplete name, address, and station call of the candidate should be included. All such petitions must be filed at the headquarters office of the League in Hartford, Conn by noon of the closing date given for receipt of ominating petitions. There is no limit on the number of petitions that may be filed, but no member shall sign more than one h petit immediately, 1. Me bers are urged to take initiative filing petitions for the officials for each Section listed above ‘ rhis is your opportunity to put the man of your choice in office t rr yn the work of the organization in your ™ t i F. E. Handy, Commu Vanager. ELECTION RESULTS Valid petitions nominating a single « indidate as Section Manager were filed in a number of Sections on or before the ‘losing dates that had been announced for receipt of such As provided by our Constitution and By-laws, vhen but one candidate named in one or more valid nomimating petitions, this eandidate shall be declared elected. Accordingly, elect ertificates have been mailed petitions to the following officials M.S. Alexander, W4RZ Nov. 15, 1929 Carolina-Cuba 79 Rogers St., 3. E., Isle of Pines Atlanta, Ga New Mexico Leavenworth Wheeler, Jr., Nov. 15, 1929 W5AHI Box 33, Valmora, N. M CGeorgia-South In the Los Angeles Section of the Pacifie Division, Mr Bertram E. Sandham, W6I QI Mr. Foster Strong, W6ELZ, Mr. Hal E. Nahmen, W6HT, Mr. FE. O. Knoch, W6BJX, and Mr. Edrie P. Jobe, W6AKD, were nominated. Mr. Sandham received 45 votes, Mr. Knoch 39, Mr. Nahmen 17, Mr. Strong 13, and Mr. Jobe 11. Mr. Sandham has, there- fore, been declared elected, his term of office beginning December 1, 1929 In the Connecticut Section of the New England Division Mr. Frederick Ells, Jr.. WICTI, Mr. John E. Dwyer, WI1AOX, Mr. H. B. Gompert, WIAMG, and Mr. V. W. I oper, WLRP, were nominated. Mr Ells received 28 votes, Mr. Dwyer 22, Mr. Gompert 20, and Mr. Loper 10. Mr. Ells has, therefore, been declared ele: ted, his term of office beginning November 30, 1929. In the Southern New Jersey Section of the Atlantic Divi- sion, Mr. Norman R. Weible, W3BWJ, and Mr. Bayard Allen, W3ATJ, were nominated. Mr. Weible received 31 votes and Mr. Allen received 16 votes. Mr. Weible has, therefore, been declared elected, his term of office beginning November 30, 1929 In the Washington Section of the Northwestern Division, Mr. Eugene A. Piety, W7ACS, and Mr. E. V. Casey, W7IZ. were nominated. Mr. Piety received 33 votes, and Mr, Casey received 30 votes. Mr. Piety has, therefore, been declared elected, his term of office beginning November 30, 1929 VII

Page 70

Ail M : We hav ANTIC DIVISION LAWARE-DISTRICT OF CO SCM, Forrest Calhoun, W3BBW s is one of the finest reporting SCM wants to thank you for your e several openings in this sec- 'fficial Observers, stations which have ecking frequency, and for some Let me hear from any one who r either or both. Maryland: W3AHI iy soon be an ORS. W3AJR W3CGC has a with iI i prospective ORS, was QSO itive nights on 14 mec. FB, OB t the Y.M.C.A. soliciting traffic raffic anywhere. W3DG is having W3AJH is sked r started. Delaware DEL. WS3ALQ is doing carpentering ng to rebuild. Dist. of Columbia r margin. He keeps four skeds W3NR, an old-timer, who has us ORS. W3LX W3GT is doing some s working on 7 mc. W3ALF is W3PM is operating at W3BWT , is now an ORS and is t back on after being off the air ind W3PM are prospective ORS news you may have, also those W3ALI e reinst ited soon vants skeds (So) ls or off-wave stations tality signals W3AJR 153, W3AS0 112, W3CGG 6, W3ALF 23, W3GT 9, W3AJH W3LX 3, W3NY 1, W3AJR 45, ERSEY Acting SCM, N. R itions point towards a very W3AS8SG has a new push-pull W3ARR continues to handle s considerable activity at the Club with their station handling ffic in this section. W3BWJ has WS3ATJ is busy teur schedules. W3AWI he fact that he has band used man 1 new ATJ 30, W3ARR 21, W3BW4J 12, K SCM,C. 38. Taylor, WSCPJ hedules with W6DNS. WSAPD M has joined the U.S.N.R. WSBA\ N. Y., are cooperating ppression of key thumps in and wn Radio Club is growing fast W2CYL, WIKH estown tles with and er tone operator on 5.5 me with VESBC. WSCEZ has a new work. WSCHL is back on the s after traffic and schedules ne on 3.5 me. at Jamestown OW. WSCNX is experimenting PC is now known by all countries DX has made WSUL jealous of WSCVJ has a new hool again YG, a new ham in Penn Yan, es. WSDII is handling traffic iles with WSAHK and NDB 2 and two 866's and is engaged new super-power transmitter r Races and looked over some WSDTH, WSBXB, WSCMU and is used in the airplanes ed ny hams in Jamestown WSDSP. WSDAJ has a new € r. Hi. W SQB has been busy WsQl s schedules with WSCRI, WSPJ has been handling traffix new requests are on hand for t Station appointments must be teurs are solicited for this work VESBA, Risal sulTAIO who visited many ama WsTH has rebuilt his DIVISIONAL REPORTS Well gang, next month with new ORS and dead wood weeded transmitter. WSUL has been busy working foreigners out, Western New York will be going 100% strong ip A.R.R.L. spirit Traffic: WSAGI 15, WSBDV 49, WSBEN 9, WSBFG 16 WSBGYV 25, WSBJO 22, WSBMJ 19, WSCDB 31, WSCHI 3, WSCVJ 3, WSDII 8, WSDME 28, WSOA 28, WS8QI 66, WSPJ 23, WSTH 6 EASTERN PENNSYLVANIA SCM, Don L. Lusk W3ZF Several stations are in line for ORS certificates In general, everything is on the upward trend. W3PR W38SM and W3ZF installed an amateur xmitter at the Philadelphia Electric and Radio Show, and pushed over 1675 messages for what we believe is a record for a single week's operation. W3SM has applied for reinstatement of his ORS and had a nice total this month. W3PB spent all of his time at the Radio Show. W3LC is third in traffic handling this month. W3AKB has been off the air rebuilding, but promises to chase traffic this month. W3U X is fast becoming a traffic man of W3AFE is due for an ORS soon W3TB will use 852's soon. W3MC has been appointed an ORS. Congrats, OM. WSAWO has had school QRM WSDHT is bothered with YL QRM. Hi. WSVD came back to the 3.5-me. band for traffic. WSDRG has a new QRA and will start the code broadcasts very shortly. W3GS has had trouble trying to work at school and operate his xmitter too. Joe Smith, an operator at W3KI, helped out consider- ably during the Radio Show. W3ARC also gave a hand Come on, fellows, let's win that traffic banner and keep it! note More reports and larger totals will have to be made to make this possible. W6AM has requested the name of a prospective Official Frequency Station who is preferably CC Anyone interested please communicate with W3ZI Traffic: W3ZF 1681, W38SM 145, W3LC 75, W3AKB 67 W3UX 57, W3AFE 50, W3TB 40, WSAWO 39, WSDHT 38, W3MC 36, WSVD 28, W3AUR 10, W3G8 13 WESTERN PENNSYLVANIA SCM, A. W Auly, WSCEO here fellows on the list who have been very lax in reporting that the slate and that hereafter only those who are reasonably consistent WSCUG, with eight Route your traffic for headquarters through him, 1 daily schedule with WI1MK. WSCFR is the runner-up. WSDLG, WSYA is « yn the 3500-ke. and WSDUT is football is cutting into his traffie work yn of the Juniata Radio Club of Huntingdor od filter. WSCE¢ Me- ire several ORS rhis is a warning is going to be wiped clean the first of the year in reporting w ll be kept on the list schedules, is still leading the section is he has a new ORS, is doing fine work n the air 7000-ke. bands WSDVZ says WSVI, the stati is all ready with the exception of a a putting in crystal control the mast up again and everything working smoothly WSDHW is still experimenting with 56-me. transmitters WSAJE is trying to drag an ex-commercial operat nt the ham game. WSCMP is still batting out the traff WSKD is going after an ORS. WSGI had his OBS ap pointment car celled. WSAGO worked all I = 3500-ke. band while using an input of six watts. The « of the Erie Amateur Atlantic Division Convention. WSAVY sends in a nice total for a non-ORS. WSDNO is in the Navy Net. WSAGQ the station of the Oakmont High School, on the air since the old spark days, is being dismantled and the material dix posed of. WSARC is Secretary for the Pittsburgh Club and WSAMA for the Erie Club h with them if you want to get in on some good times distr » officer Club are working on plans for the Get in tou rraffic: WSCUG 287, WSCFR 151, WSDLG 88, WSYA 61, WSDUT 51, WSBGW 2, WSDVZ 14, WsVI Ll WSCEO 10, WS8SDHW 9, WSAJE 6, WSCMP 37, WSAVY 25, WSDNO 8. CENTRAL DIVISION ENTUCKY SCM, J. B. Wathen, III, W9BAZ K rhe QSO Contest sponsored by the N.K.R.A. of Cov- ington closed November 1. W9BXK topped the list and pocketed first prize of $7.50 nice going! W9CEE says DX is wonderful, but traffic scarce. We will shortly have W9BW] back with us. Things are going light at W9JL. Anew 852 is perking at W9AZY. W9YETD is in promises a big noise. W9GBX is getting R7, QSA5 in Africa his 210. W9EYW nearly kicked the bucket, but 8 getting in fine shape again. W9GJG is now W9ZZE in the W9ELL is a brand-new ORS. W9GGB is again 1930 a new home ane with Southwest OST FOR JANUARY, ove Ma cre’ fort wo wo whe the traff fine wx he is Wor soon wir says relie Y. N wx due | spar! brew Just licen: move Radi more new at W with W9D Secti 3530- schec poun been up. 7] W9c The furth. from W9B bette W9G fone | Qs’

Page 71

G 16 CHI ySQT ites

rebuilding. W9FZV is still busy with asphalt business W9ENR’s report sure was a welcome one. W9OX has a new push-pull which is the envy of the town. W9BAN has a 10-kw. tube — for display purposes only. “ How dry I am” will be sung by W9ARU in Cuba. W9EDQ has applied for ORS. Incidentally a couple of ORS lost their tags for not reporting this month. Traffic: W9OX 81, W9BXK 67, W9JL 64, W9ENR 57 W9BAZ 56, W9GBX 12, W9BAN 11, W9EYW 11, W9AZY 9, W9GGB 9, W9CEE 6, W9ELL 5, W9ETD 4, W9FZV 3 INDIANA SCM, D. J. Angus, W9CYQ — W9ASX, operator on the S.S. Senator, sent out an S.O.S. and jumped overboard as his ship sank after being rammed by the 8.5 Marquette crew. FB! He was also former, 80 ¢ W9FCX claims he is the best ham in Crumstown, as he is “it.”" W9GGS has changed to screen-grid receivers. W9EDC will be on as soon as his power supply arrives. W9GJS is beginning to handle traffic at Seymour W9CIC is the star station of the state with a total of 60 messages. W9BK.J complains that his set has an are in it W9MQ has a new remote-controlled transmitter. W9BQE )I was presented with His 8.0.8. was the means of saving part of the saved. WIAKD lost a plate trans- annot menace the BCL's until he gets another ‘Ons derable has a new shield grid receiver. W9C a new junior op, weight 10 lbs. W9GGP has changed from 7000 to W9PC bought W9AFI complete, and was issued the same call under which this set was operated for a number of years. W9ABV, W9AET, WOCLI ind W9EPI ire new stations at Fort Wayne The Radio Traffic Association of Fort Wayne is meeting regularly with a definite program for every week. W9CI( C. M. Fishback, is Route Manager of Indiana District N comprises the countnmes in the southeastern corner SSO ke tor the winter 6 which of the state. Amateurs in this district please get in touc! with W9CIC. W9GJS is going strong on 3599 ke. W9ATI is a new ham in Seymour. W9AQO0 is blossoming out wit! a new 5)-watter on 3500 ke. W9CIC is very busy heading up the new Naval Reserve unit at Seymour rraffic: W9CIC 60, W9AEB 4, W9OGKI 8, W9GGJ 1 W9AXI W9COI 4, W9GGP 2, WO9BKJ 18, W9EMR 36 W9DSC 7, W9AXH 6, W9AHB 2, W9DBJ 6, W9GJS 11 WICYQ 13 ILLINOIS again witli is SCM, F. J. Hinds, W9APY W9DXZ W9AFF is doing nicely with a MOPA 3.5 and rPTG on 7 me. using a new 65'4-foot Hertz VI W9FO ke i W9BHW when he gets e1 yur w Zepp up or the r t \ rdaing t WOAKA 6 a the Dest traffic w W9BLL has a nun fine traffic report. As soon as the new power supply riv W9CKM w be on with a ba r traffic. WOBEF states he is a television ha ind is it for a 14,000-ke« phone set W9FUR reports 14 me. poor and expects to be on 28 m« soon. WOEGY is a new har it Zion City, UL. W9ANQ and W9CUH are the only active stations in Waukegan. W9GJ says a new phone band will certainly be welcomed t relieve our present bands. The Radio Club of the Aust Y. M. ¢ \ W9BZD on 7090 and 14,009 ke WOGI\ wain. The QRM at W9BMQ is bad due to local ! ol QRM, consisting of elevator motors spark coils in laboratories W9CRR is using a home brew transformer with 4 201A's for rectifier. W9ERU has just become owner of a brand-new extra first-class amateur license. WOBRY has a MG ona 210 High C Hartley. W9ETP moved into the basement and works on 7 mc. The Chicago Radiofone Club wishes to announce it would like t more members See WOEZN W9KB is tryir new filter condensers. A new power supply is being built at W9CKZ. Will someone tell WO9FDY how to get PDC with his 8 mikes, 30 henries and recto-bulbs on a 293-A? W9DGK is on the Wis nsin Army Net in the Illinois Section. WO9ACU is an OBS now. W9DJ has 159 watts on a 3530-ke. fone. W9CCZ reports bad QRN and QRM. Many scl edules. ‘ps a nice Du we he will put a ne eT i nice st edule

» have r out some schedule re being kept as usual at WOBKL. WO9BVP is pound wel is usual. Push-pull experimentation has been ¢ . n at W9BZO. W9FCW reports traffie p up. The new voltage-fed Hertz at WJIBRX ng W9CUH is ist pitehed ear n 3.5 m for the winter The MG blew it at W9AMO AC is being used until further notice. W9BNI copied the AA message complete from W2CXI NN-CAB is 1 Chieago, according to W9BCA. W9CZL has a new key filter which gives hit better QRL W9FDJ reports Afr in DX. W9ALK and W9GIV are very QRL. WOBNR 1 14,000 fone permit. pplied for QST FOR JANUARY, 1930 sister 1s second op a

Traffic: W9BKL 139, W9FO 114, W9ERU 86, W9BLL 76, W9APY 58, W9BNI 45, W9AKA 43, W9GJ 42, W9CZL 38, W9FDY 3t, W9DGK 25, W9BMQ 23, W9CUH 22, W9BNR 18, W9BEF 17, W9DOX 16, W9AFF 13, W9AFN 12, W9BHW 11, W9BVP 11, W9BZO 11, W9FCW 11, W9GIV 11, W9AD 10, W9ANQ 9, W9AMO 7, W9KB 7, W9FDJ 6, W9ACU 5, W9CRR 4, W9DYZ 3, W9ALK 2, W9CKZ 2, W9CCZ 1 MICHIGAN SCM, Dallas Wise, s getting ready to wor 1 410. W3SKN is loo WSBRS has bee: i pair of UXS855 new Hertz with a WSCEP WSACB k again with a chemical rectifier and cing for schedules with other schools 1 going great guns. WSDED is now using s and a new Zepp antenna. WSBV has a one-wire feeder system. WSZF is now go on the air. WSAUB works the station when yme on week-ends. WSCAT built seven new transmitters n one week and then went back to the old reliable Hartley Ws8JD now has the xtal on the air. WSDYH leads the traffic WYEGF, way up in Laurium, did some stor work this month. WSAZO is QRL work WSDSF has the old set going on 3500. WSBRO has a MG I WSCJZ reports for the first time. W8DHC has moved up to 3500 for the winter. W9AXE now has his ORS. WSDFS says he is ilways getting mixed up with WSDSF. WSCI ready to handlers again rm service 10ow and wants another QSO party soon has been W9CE has gone hunting, and here’s hoping he is one that comes back WSCKZ is still QRL work. WSAX has been on with both fone and CW. WsMV has QRM from Fords on 14,000 WSAEQ has several reliable schedules on 7000. WSAAF WSZZ has been ill, and we hope that he is feeling great again now. WY9EQV, WSQN, WSHL and WSDYQ reported via radio through WSDYG WYE, located at Selfredge Field, has a couple VT4's working wit! 1 screen-grid detector was heard during the QSO party } Ww <ing back to back into 3590 Hertz. The November QSO party went over fine, and it was sure great to hear the gang at itt it night. WSDYH took the honors on 3500, working 20 stations before midnight. W8SBWR was second with l5 an 1 Capt iin Baldwin of W2CXL was third with 12 W2WC, WSSH, WaCJ, W9DFZ were recent visitors at the SC M's sha WSWDO has been trving an 852 on 14,000 ke rraffic: WSACB 1, WSDMS 32, WSKN 4, WSBRS 104, W9DUE 8, WSDED 14, WSDVQ 4, WSBV 2, WSZF 1, WSAUB 2, WS8H 12, WSCAT 89, WSJD 38, WSDYH 402, W9EGF 31, WSAZO 6, WSDSF 6, WSBRO 77, WSCJZ 6, WSDHC 25, WSPP 5, W9AXE 21, WSDFS 3, WSCU 10, W9CE 13, WsCKZ 12, WSAX 35, WSMV 7, WSAEQ 218, WSAAF 4, WSDXM 4, WSDYQ 9, WYE 162, WSHL 11, WSQN 167, W9EQV 31, WSCEP 76, WSWO 6 OHIO SCM, H. C. Storck, WSBYN res another Well, gang, ul have done your share to ke it a fine one, too. The OW, WSCNO, leads the state wit! 375. WSCRI ) 75, w his very FB also ilso makes the BPL with 218 nes next on the list, turning in WSLT, the station at Ohio State \ Three make the BPL this mont Hurrah for Ohio. WSAQ says that if the ep , ute id been the 16th, he would have made he BPL to is he handled 35 messages on the lth WSBBR turns 1 FB total. WSGZ turns in a nice total, und a report on AA WSCWC is putting up two 80-foot steel towers. WSBKP is on with an 852 and working a lot of DX. WSBAC is GONE. Hi. Another case of activities imping into double harness. Congrats, OM, and hurry back. WSADI ino r \ yp of Delaware, Ohio, sends n her first report, and of the regular ORS to shame WSBKM turns in a goud total and reports on several local ms. WSADS has a phone in action on 3500. WSSG blew ip his filter condensers and rectifier, and is now using a MG. WSLI is getting interested in traffic. WSOH is runner- ip WSDBK has been trying 14 and 7 me. for raffic. WSCFT has been busy with school. WSNP got his . ind 15th. FB. WSARW and another w are building a shack for radio exclusively. WSCIY rts QRL a nice YL at college and also with a new Nash WsAZO for ORS tal between the Ist sport roadster turns in his first total since last winter. WSBEA is about disgusted with schedules and his ite. WSPL is still busy with the “talkies."” WSATL has ven in the hospital for three months, having been in an ito a lent, but is recovering rapidly. He says that his WSATL. WSDVL says he is ready ic any time. FB. WSIF says QRM is iround his place. WSEJ te the SCM about his trip to the WSBZL take Cleveland traff Iding a convention on 3590 ke izain. WSCCS wr vest coast, and le me wish I'd been along

IX

Page 72

the doings of several hams and the Radio Association. WSRN says he may winter because he may accept an operat- ter. Let’s have your reports on time, you are going to be inactive for a rable cancellation of your ORS so t written off of the list as dead wood 75, WSCRI 275, WSLT 218, WSAQ WSGZ 125, WSCWC 89, WSAKP 42, W D 36, WSBKM 35, WSADS 27, W8SG [ 23, WSDBK 22, WSCFT 22, WSNP WSCIY 11, W8AZO 10, WSBYN 10, ws ), WSDDK 8, WSATL 8, WSDVL 5, SCM, C. N, Crapo, W9VD — W9DLD resign as Route Manager to devote er’s business. Good luck to you, Joe! i ' t me. W9EFX is going good on7 and 3.5 e air every Friday from 7 to 10 p.m n for the Naval Reserve. W9FBJ S.N.R. W9SO is working six schedules mn for the College Radio Union W Net contacts. W9DJK has schedules W9CNH. W9FSS is very active in the AA 23 a new 4-tube screen-grid receiver Ww tal going now. W9OT has consolidated vy location and has a 55-foot pole to rmerly W9BYE at Milwaukee, is now St. Norbert College, West DePere. W rganizing the 65th Cavalry Net in 740 ke. every Monday from 7 to 10 7, W9EBO 128. W9EFX 86, WODTK 7 : ) WO9FAW 47, W9DJK 44, W9OFSS IN 23, W9OT 21, W9BIT 21, W9VD DAKOTA DIVISION y \ SCM, B. Ss. Warner, WYDYV\ NX s new UX-250 sure does its stuff a f storage B batteries on the plate Ss month with a very nice ed to the air with one 201A tube lass at school. W9DYA is still W9DM 12, W9FCA 2 ESOTA SCM, J. C. Pehoushek hree daily skeds, handled nearly lace in the BPL. W9BWN has five ng strong. W9YC, formerly f-excited set temporanly. W9DRG it of some Army men. W9BHZ is ng traffic in great style. W9CIX is wave AC receiver and says it's OK working FB. W9AIR has a five w. W9FLE had a ham fone fest gs adjusted. W9EY L has his xmitter C's overtime helped the pay check, W9DGE has W9DKX and W9BHB rpe until the winter tie-up. W9ETS nesota Theatre evenings. W9EFK W9DGH is having lots of fun with back in town. W9ELJ is on the ne. W9DAW is also going with the DSH is planning on going west with CRW. W9AMK and W9DOP push W9FJJ, W9DPX, W9DHP et« iS, WOBN 162, W9YC 29, W9DRG 22, v t, W9DMA 4, W9ATIR 3 MINNESOTA SCM. C I Jabs W V leads in traffic and has just been r for Northern Minnesota. He is a r and is trying to put the section r support, fellows, so his efforts DOQ is now working in the 7000-k¢« tle activity around Park Rapids W f reports on 1929 sigs. Thanks I DS are installing a fone station in the W9AV has had trouble with his Iding to an ultraudion. W9BBT is ks the local Home Guard is going tter with a couple of 50-watters t for this time of the year, but it is in interesting report unless vou Traffic: W9CTW 44, W9DOQ 38, W9GGQ 21, W9BVH 20, W9BIW 10, W9CTY 3, W9AV 2, W9CF 57. SOUTH DAKOTA — SCM, Dwight M. Pasek, W9DGR — Over a dozen cancellations were made this month, This might be a hint to those who still hold an appointment. The SCM will be glad to receive applications for a few ORS, as we need to boost our traffic reports. W9DB is the only station to report traffic, and is active on 3525 ke. W9YAM is a new station at the University at Vermillion. It is oper- ated by Scholes W9BOW, Vert W9EUJ, and Sirois W9AAR W9CKT is on regularly, and reports that W9DYX at Rapid City is the only South Dakota station he can hear W9ODB 3. DELTA DIVISION @ RKANSAS —SCM, Henry E. Velte, WSABI — The A R. I. paid us another welcome visit. W5AQX is our star traffic handler this month. He has been appointed an Official Broadcasting Station, and the gang should look for him on 7160 ke. W5IQ and W5HN are both on pretty regularly. W5BCZ is selling out. W5ACA, our former SCM, was married on Oct. 25th. We wish to extend congratulations to both he and his wife, and wish them lots of happiness. W5ABI is installing a.mercury arc rectifier Here is looking forward to more reports next month. Traffic: W5AQX 36, W5ABI 12, W5IQ 6 TENNESSEE — Acting SCM, J. B. Witt, W4sP— Well, fellows, do you care to have a report in these columns It is up to you, for I eannot make out a report without any dope. The only sta- tion to report this month is W4VK. He is keeping skeds with W5BEV, W9GBI and W9GCP. FB, OM. W4AHD is working everything. W4DG is building a new transmitter. W4FX and W4HK are on ock Traffic: W4VK 4, W48P 2, W4AHD 3 MISSISSIPPI SCM, J. W. Gullett, W5AKP The amateurs in Mississippi are gradually waking up. W5AZV of Jackson leads the section in messages handled. W5BHL s working real DX with a UX-201A. W5AWP is getting real good reports on his 59-watt fone in the 3500-ke. band W5AED complains that the QRM in the 7000-ke. band is terrible. W5AJJ is still threatening t yme back on the air. W5AAP has his transmitter parked at 7150 ke. and says tubes have decided to go to work again W5AOM of Meadville is in the hospital at Natchez with an attack of pleurisy. Sorry to hear of your illness, OM W5ML is the only active amateur in Natchez but, being a doctor, he has very little time to operate his transmitter W5AGV is going to school at Georgia Tech., and his new call in the fourth district is W4CX. W5AQU is attending dental school in Atlanta, and his new call for the winter is W4MP. W5AMR is the new engineer of WCOC in Meridian W5QQ is going to move his transmitter and will work in the 14,000-ke. band. W5FQ has added Cuba to his list of foreigners worked. W5GQ is working real DX with his UX-210. W5AKP has been held up waiting for a trans former Traffic: W5AZV 41, W5AWP 24, W5AED 18, W5AAP 5 LOUISIANA —SCM, M. M. Hill, W5EB Fellows I certainly appreciate your many expressions of congratula- tions upon my being elected Director of our Division. I assure you I will do my best to serve the League to my best ability. Since I am Director, I am resigning as SCM with this report. That leaves a vacancy for a new SCM let's get a live wire. What say? General activity for the state is on an increase. W5ANC of Shreveport is going to be on the 7000-ke. band soon. W5WF, old faithful, makes the BPL again. W5ANQ runs up a nice score again. W5BDJ has a crystal. W5BHV is keeping the tubes warm on regular skeds. W5RR is at LSU, and says W5YW is going to have six ops, WSBAY, W5UI, W5AQP, W5BHH, W5AKW and W5RR. W5AXS at last has his xtal where it will pay off. W5NS has a bad case of YLitis. W5ANA has a nice bunch of skeds. W5WG has ideas of xtal on 14,000 ke. W5EB has moved to Natchitoches, La. Traffic: W5WF 214, W5EB 124, W5BHV 106, W5ANQ 102, W5YW 90, W5BDJI 49, WHWG 2 r not? each month for Tennessee « isionall that his — HUDSON DIVISION SASTERN NEW YORK—SCM, H. J. Rosenthal, |: W2QU — The Larchmont Radio Club announces + that they are buying a clubhouse, installing a quarter KW transmitter, and will have an operator on watch every night to take care of all the traffic for this district. Calls and schedules will be announced next month. W2CUF, who has QST FOR JANUARY, 1930 Saas SS 7 24 PS tS tS oe = sho to ¢ OR WE she the fam pro, yea fore

Page 73

BVH DGR »ynth nent, RS, only TAM )per- .AR X at Par. The X is been gang both our tend lots ifier = imns or I sta- keds D is tter. The \ZV sHL ting and d 18 air says ain with 1 ping ter new ling r is ian ¢ in L of just received his ORS appointment, heads the traffic list this month. W2LU is still keeping traffic moving with four schedules. W2A LI manages to listen in between service calls in his radio business. W2ACB reports growing amateur activity in Schenectady. W2ACY is unable to spend much time on the air, but picks up a few odd messages. W2AGR has moved to the first district and will soon have an ORS there. W2BUW and W2RD get their messages from a girls’ college and are guarding their source of supply. Hi. W2BMC will be an ORS soon. W2ANV is now an Army-Amateur Net control station and W2OP is the’ alternate. W2O0P has moved his transmitter into the garage so he can use break- in. W2SZ handled a play by play report of the CCNY-RPI football game with W2HJ at the other end. W2BKN is starting schedules and will have a big traffic report next month. W2BAE is keeping a daily schedule with W1WYV in Boston. rraffic: W2CUP 240, W2LU 140, W2QU 65, W2BAE 56, W2RD 48, W2ACB 46, W20P 41, W2ANV 40, W2B\MIC 35, W2BUW 31, W2ALI 13, W28Z 8, W2ACY 8 NEW YORK CITY AND LONG ISLAND Acting SCM, V. T. Kenney, W2BGO Manhattan: W2AFV, an ex-ORS, using an 852 with 250 watts input, sends in a nice traffic total. W2BDJ is to be the operator at the 22nd Engineers Armory in N. Y. C. as soon as a call is issued for the station. W2AFO is back with us again on 7030 ke W2HJ, the Radio Club of the City College of New York, is trying hard to arrange skeds with other colleges throughout the country. W2AOY has tried the ““ W9EK system of key- ng,’’ and is telling the world of the wonderful results ob- tained. W2BCB keeps Army skeds on Monday nights W2KR promises action with a portable at Blue Point, L. I and can be recognized by the call of W2AXR. W2BNL is getting out with a 3.5-me. fone using a 210 oscillator Bronx: W2APV has increased his skeds to 16 a week and makes the B.P.L. again. W2BBX-2FF is working on 14 me W2AII complains of difficulty in getting rid of traffic on 7 me. W2AFT is a new Army station in the Bronx. W2AET is dividing his time between camping and radio. Brooklyn By keeping 16 skeds weekly, W2A\V R-W2ARM has piled up a very nice total. W2PF, Second Corps Area NCS alternate, is stepping out with his new outfit of intermediate amplifier or erystal oscillator. W2BVF, an ORS of the WNY Section, re- inactive while attending school in our section, and keeps traffic moving just as if he were home. W2BI\ complains of the out-of-band stations and would like to get after them. W2B0, the Brooklyn 00, can be heard as an OBS on the 7000-ke. band using crystal control on 7130 ke W2CCD-W2APB can now be heard on the 3.5-me. band with a good fone. W2ATZ, the newest ORS among us, re- ports that his protégé can be heard as W2BVY. Long Is- land: W2AVP is doing his job as RM for L. 1. and is contin- ually adding stations to his long list of skeds. W2ASS is busy with the transmitter of the Nassau Radio Club, a new club nour section, which promises to be one of the few real radio clubs we now have. It meets in an ex-Real Estate office at Oceanside, L. I., one and a half blocks off Long Beach Rd on Atlantic Ave. W2ATT is on the air regularly. W2AKW, who recently came from W9BWN in-Des Moines, Iowa, has his transmitter going and will take your traffic for the vicin- ity of Rocky Point, L. I., where he is helping keep the RCA station going. W2AA of Merrick is looking for more traffic W20T, an old-timer, pre-war SVV and post-war WSBLX- WSVS, is the secretary of the Nassau Radio Club Traffic: Manhattan: W2AFV 234, W2BDJ 25, W2AFO 18, W2HJ 15, W2AOY 13, W2BCB 13, W2KR 5, W2BNL 2. Bronx: W2APV 202, W2BBX 39, W2AIl 27, W2BGO 16, W2AFT 13, W2AET 6. Brooklyn: W2AVR-W2ARM 786, W2PF 74, W2BVF 60, W2BIV 35, W2BO 30, W2CCD 20, W2ATZ 18. Long Island: W2AVP 141, W2ASS 17, W2ATI 9, W2AKW 5, W20T 24, W2AA 1 NORTHERN NEW JERSEY SCM, A. G. Wester W2WR The coming A.R.R.L. Sectional traffic contest should bring every ORS on the air and the SCM wants to see this section show some action. Warnings have been sent fuses to be to delinquent reporters and they are now stricken from the ORS membership. W2WR is putting consistent signals in all parts of the U. S. and possessions. W2IS is busy with WBMS. W2ANG has taught his YL in N. Y. the code and she is soon to apply for a license. W2BAL is due to return to the air. W2JC has an excellent xtal station. W2AOS8, our famous A-A station, had fine reception on the Navy Day Program. W2JF again makes the B.P.L. and his traffic this year takes the place of W2CP, who kept our station in the fore last year. W2CJX had some fine QSOs with S. A. this QST FOR JANUARY, 1930 month. W2BIR has been helping VE3CR get started by orrespondence. W2AI leads the non-ORS and has been keeping skeds with FK5CR and FK6CR on 14 me. W2APU is being appointed an ORS this month. W2DV has been busy with A-A skeds. W2AUP has been busy putting up new antenna systems rraffic: W2WR 1, W2JF 120, W2AOS 13, W2JC 16, W2CJX 14, W2Al 52, W2APU 10, W2DV 11, W2AUP 6, W2C XL. 1023 MIDWEST DIVISION OWA SCM, H. W. Kerr, W9DZW-9GP — Our RM, | W9EJQ, makes the BPL and leads the host. W9ESP follows with W9BCA nosing out W9FFD from third place. Grandpa now has a distinctive call for the “ fireside” xmitter through the kindness of the Department, i.e., W9GP. W9CNZ comes again with a nice report. W9EIV has a t.p.t.g. on the air. W9FWG has BCL troubles to eliminate. W9FJA reports a nice bunch from the college town. W9FLK picks a few, as does W9ELV. W9FQG sent his report by dio. Mrs. Glenn Joslin now has the W9EIW license, since Pauline was married and finds time to keep skeds, among other duties. W9GCP radioed his report. W9DXP is back from two weeks vacation in Chicago. W9GKL continues to keep Ames on the list. W9EJQ visited the W9GCP station the farm. W9BTL and W9CUX are expected home from ommercial work on lake steamers for winter vacation. W9LA, W9DVS and W9BQT are schooling at Ames. W9CEN is on 7 me. with 210’s in push-pull. WOBWN may be heard from Rocky Point with his W2AKW call. KOIL is nored by two Iowa and two Nebraska hams on the perating staff. We hear some phone folks with improved odulation. FB. 73 and Happy New Year lraffic: W9EJQ 234, W9ESP 108, W9BCA 102, W9FFD 101, W9DZW 100, W9DNZ 83, W9ELY 39, W9FWG 39, W9FJA 39, W9FLK 30, W9ELV 27, W9FQG 22, W9EIW 20, W9GCP 19, W89DXP 8, W9GKL 2 KANSAS SCM, J. H. Amis, W9CET W9FKD and W9CET make the BPL. W9FKD is on a cross-country ok-up. W9CET is keeping five schedules. W9DEB says thanks to W9FLG and W9CET, the 210’s are on the air. W9SS reports WODFY has been afflicted with a new saxo- phone and YL. W9BTG hopes to make the BPL soon. W9GFO has just discovered that 14,000 ke. is good for DX. W9BEZ is a post-office clerk. W9FLG, the RM, is all set or the winter. The SCM again trims the RM in traffic. W9ESL built a new plate transformer for his 3500-ke. fone rig. W9CFN has put his rig on a panel. W9HL is lining up a ce bunch of skeds. W9GHL is installing a MOPA. W9BPL laims 14,000 ke. is getting better day by day. W9BKR has written a bed-time story involving the SCM. Hi. The following ORS appointments have been made: W9SS, W9BTG and W9GFO. The K.V.R.C. meets the second ind fourth Friday of each month, at 8:00 p.m., at Topeka Chamber of Commerce. All amateurs are invited to attend. rraffic: W9CET 226, W9FKD 224, W9DEB 65, W9SS 49, W9FLG 46, W9BTG 35, W9GFO 31, W9BEZ 31, W9FLG 30, W9ESL 28, W9CFN 10, W9HL 7, W9GHI 7 NEBRASKA SCM, C. B. Diehl, W9BYG — W9ANZ has to see the R. I. soon. W9EEW reports from Chicago. W9DTH is working on a new filter. W9DRF changed his iddress to 5324 No. 27th St. W9DVR is still fighting his freq-meter. W9FAM rings the bell this time, and wants unother southern schedule. W9DI is home week-ends W9BOQ craves traffic. W9CHB has schedules, and handles neat traflic. W9BBS is pretty busy (conducting), but finds some time for radio. W9CDB is too busy in the shop to finish the old set. W9BQR expects more traffic soon. rraffic: W9DTH 3, W9DVR 7, W9FAM 131, W9DI 7 W9BOQ 21, W9CHB 24, W9BBS 6. MISSOURI SCM, L. B. Laizure, W9RR W9DXY leads the state in traffic. W9FTA was second high in St. Louis. New ORS were issued to W9DXY, W9PW, W9FTA. WS9DOE is located in Minnesota. General activity is ex- ellent this season among St. Louis stations. The U.S.N.R s making good headway with three officers commissioned ind about thirty men enlisted. W9PW is personnel and publicity officer for Missouri, Kansas and Nebraska. W9DXY is Executive Officer for the same territory. W9EAZ s St. Louis Unit Commander. W9BAO is organizing an enlistment campaign to boost the enlistment in the St. Louis vicinity. W9DZN is back home temporarily between jobs W9EDK is moving. W9BEU is putting in a 204A. W9BMU combined traffic and DX this month. W9DUD applied or U.S.N.R. enlistment. W9FUN reports school QRM. XI

Page 74

haywire set that works better plains about lack of traffic on 7-me » long report and news letter from working on a newspaper in Rolla with blowing up stuff. The Nevada. W9EPX is still in Chicago W keds for Weather Bureau reports W W9DHN is the probable new 7 sked in most any direction Ww W9CJB is a new ORS. W9GJI nsiderably in Festus. WOFAL was 1 fourth Missouri district. A han Sunday in both K.C. papers City in traffic. Old W9FM is back ce as W9CVT. W9DQN, QST' s udeasts Monday, Wednesday 7 band. W9CFL has almost W9YRR is trying to get going \ ra the reports W9DZN 6, W9GHG 3, W9BEU N 10, W9DUD 25, W9BMI $4 W9CJB 42, W9FYM 1, W9EFR ‘ \ BT 6, W9BJA 162, W9CDU 13, v W9DQN 53, W9ZZ 201 W ENGLAND DIVISION . SSACHUSETTS SCM, M W |: WI1CMZ leads the section this af e BPL along with WIACH and VW drills help W1ACH's traffic V certainly earned his appoint- e 1715-ke. work. WLBBT is ve hope it will be working soon \ 1 others in Worcester and had LD it Danvers, for part of his pion Tube Works. WIBVL has WIBLD all he knows. We shall e will come when we can see hin SOB is being bothered by school ( believe 3500 ke. is the place r to Concord, Mass., each day in spite of less time on the ein the QS7T Station Des ription ( e total, but says his nerves are QORM. Our new RM, WIKH ites. He reports a 14,000-ke @) Island. Speaking of DX on 7000 ke., but now on yaad AC notes that DX has \s soon as the gang rebuilds for expect better luck WIACH 250, WILQ 210, W1LM \ 107, WIKH 83, WIARS 68 vi WIACA 32, WLWU 30, WLASIT 28 Vv WIAGS 8, WIBBT 5, WIBLD 4 CHUSETTS SCM, Dr. J. A \MZ gets a great kick out of |} he Edison laboratories at West { ick at his new location, 221 | Mass. WIL BKS says that WI BSN und that WIAWW is bus s to be silent lately. WIAKA a WIBKS has a new electro bug 7000 ke. WLBCB had to have that mast of his. Hi. WIAKW has \KW ited at Springfield Air I ow and then. WICQR is our I AEP chat with Byrd occasionally W WiCGR. WIBAA is coming on w VSBM, star traffic man of Ohio makes t his xtal set working with the VIACY. WIASU is getting 9 plus \DO is getting fine reports on 500 the new dial fone iuttended a ter installing WIBNI meeting at the I n West Africa for about x VW ester Radio Club is having its gs at 274 Main St., Room iteur rad 18 welcome lers had their set, WIBBZ ‘ where they originated 214 1 the air with his 204A ind likes ind consequently only to the traffic game BCLs WIAZW has three skeds and is handling lots of traffic. He wants a sked with Worcester WIVC has the bug again after nearly two years’ silence and will soon bust the air with a 50 Traffic: WIBNL 51, WLASU 2, W1AMZ 3, WIADO 13, WIBKF 20, WIBWY 22, WIEO 12, WIAJJ 19, WIBBZ 214, WIAZW 124 MAINE—SCM, G. C._ Brown, The A.R.R.L. was represented at the Radio Show in the form of a short-wave station installed and operated under the auspices of the Queen City Radio Club The booth was the center of a large amount of attraction, and the public came across with a goodly number of mes- sages. Permission was obtained from Mr. Kolster’s office to use WIBFZ's call. Work on the new club headquarters at Bangor is progressing in a very creditable manner, and it is expected the call letters WLACR will be assigned to the new station. The SCM was very pleasantly surprised with a recent visit from WIBKN of Houlton. WICDX says he has his phone set going fine now. WLAFA has a good list of schedules. WIACW says that he is going FB in Mars Hill WIACYV is using xtal 1 push-pull output 100 W1QH has been a busy man with the key this month and is top liner. W1ASJ of Bar Harbor tells us that the Bar Harbor Club is on the air with a 100-watt station The call is W1BGS. FB. W1BFZ has a fine total this month WIANH is the northern radio station in the U. 8 WLAUR sends in a good total. WIATO reports a good list of achedules WI1AQL recent Bangor now with watts most rraffie: WIQH 215, WIBFZ 189, W1ATO 127, WIAUR 135, WIANH 111, WIKQ 91, WI1AQD 88, WICDX 77 WIAFA 65, WITB 43, WIAQL 30, WIACW 36, WIAHY 8 WIACV 3 wilt rhe gang! We are SCM, C. A. Paulette slowly, VERMONT report cards ere making this month still coming in ver) three reporting stations uts in ORS, but it’s ARR in awful showing only [ hate to make any drastic « got to come unless vou do report, as that is the law. Send in a few reports and ev will be FB Our CRM, WICG\X, is very active again now and can be found on 3650 ke. with a PDC note every WI1BJP is working night and day, so not much time left to come on the air. 73, gang, and try to get your reports in next month Traffic: WICGX 18, W1IT 14, W1BJP 12 erything night 1 RHODE ISLAND SCM, C. N. Kraus, WIBCR— WIBIL a d WIAMU make the BPL. W1MO handled some traffic on 14,300 ke. WIBQD is on 14 and 7 W1BCR will soon be on the 14,000-ke. band with a crystal- controlled fone. WLAWE is working good DX with his new UX852. The Radio Club of Rhode Island invites hams to drop in and visit them. Robert Meader five-meter work with nterested in ing information on this work should write ire of the club, 92 Keene St., Providence 1 graduate of Browr University, is devoting his time to reflector antennae. Experimenters arranging schedules or wisl Mr. Meader in « R. 1. President Kraus is in charge of construction work ona television transmitter. The club would like to exchange speakers with any other clubs in New England or Eastern New York. Regular weekly meetings are held every Monday evening at the club house. Pearl St., Rumford, R. I Traffic: WIBIL 642. W1AMU 502, WIBCR 45, WIMO 24, WIBQD 8, WIAWE 4 NEW HAMPSHIRE SCM, V. W. Hodge, W1ATJ WI1IP and WIBFT both make the BPL this mont W1APK is doing BCL service work. W1AUE handles a few WI1AUY 1s experimenting with crystal control. WIAEF reports visiting WIANS with WIIP. W1COW 1s back at Philips Exeter with an 852 outfit, and wants skeds for Wednesday W2E I is second op WICEQ is « WIMS is and Saturday afternoons yn at Durham with a 50 and 3 ops DXing in the 14-me. bands, with fine results. W1AGO has started mm Nashua. WITA is rebuilding. WIAFD reports 14-me. band dead. Simpson, W1HO, is in high power trans mitter section with G. I WIAFD, WIAOV, WIAUE WIAUY, WIAVJ, WIBLP, WICMB, WICDT, WIIP and WI1MS recently passed examinations for amateur first tickets rraffic: W1IP 301, WIBFT 253 WIATJ 24, WIAUE 9, WIAPK 7 NORTHWESTERN DIVISION ONTANA—SCM, O. W Viers, W7AAT— M W7HP takes traffic honors this month and makes the BPL. FB Lindy! W7FL handled a few. W7DD W7AAW W7AEM WI1AEF 40, W1CEQ 27, reported by radio is still going strong is building a new phone transmitter for the 3500-ke. band. 1930 QST FOR JANUARY, cay sur Eu FB Wi Ida Un air alte Wi Mc for ex- shi| nev W7 W7 at | his hav eve Pasa in tl of t Swit

Page 75

ence »13 BBZ W7ANT will soon be on again with a new 75-watt high- capacity TPTG. W7AHN has been laid up most of the summer, but is gradually getting back on his feet. W7AY of Eugene, Ore., visited the SCM on Labor Day and had a FB chat. W7AAT is going strong rraffic: W7HP 204, W7AAT 67, W7FL 35, W7AAW 28 W7DD 4 IDAHO SCM, J. L. Young, W7ACN-W7JL-W7ST- ALD, W7JW and W7ACN-JL are attending the College of Idaho, while W7ABB is one of the ham population at the University. W7AHC and W7PJ are keeping KIDO on the air. W7ST is teaching radio at the Boise High School in the afternoon and attending the C. of I. in the mornings W7ALC now lives in Boise and does the radio work for Montgomery Ward & Co. there. Ex-7GX does the same for the Nampa store. W7GU is on the air in Boise. W7KA, ex-W7AFK, lives in Caldwell now. W7ALW is holding the ship for northern Idaho. W7ACD says he is putting up a new sky-piece. W7IY paid him a visit early in November W7HE has given up radio for talkie experimentation W711 is also a talkie operator. W7ACK has a big radio class at the Nampa High School this year and says a number of his pupils are applying for licenses. W7ACN-JL will soon have a second op as his kid brother is studying ham radio in school. The SCM would appreciate a long letter from every ham in Idaho, to enable him to get the radio activities in the state reorganized. Please give details about your station, traffic and yourself Traffic: W7ACD 6, W7ACN 4 WASHINGTON SCM, Otto M. Johnson, W7FD W7BB is high this month with 94. He has worked WFA several times. W7LZ also has QSO'’d WFA. W7ACS and W7IZ are electioneering for the office of SCM. W7FD wishes to thank all the gang for their cooperation during the past several years with him as ADM, Acting SCM, and SCM. The friends made will be long remembered. So much for our “Swan Song.’ In Seattle W7TX, W7AG-W7SL, W7LZ and several others are still doing their stuff. W7TX reports most Alaskan stations closed down for the season | pin Everett W7RW, W7MW, W7ACY and several others are on. W7PH is devoting all his time to “talkie” movie equipment. W7ABN is on the ship Vigilant, with Capt Matt Peasley, as radio op. They are Honolulu bound W7ACA is back and wants skeds. W7MP is in the Forestry Service at Cle Elum. W7AIX is going to Ft. Monmouth to the Signal Corps Laboratory, and will soon be signing W2PDQ or something. W7ABU is a newcomer in Kenne wick. W7GP and W7AMO keep Olympia on the map W7AOB at Tekoa is off the air f. r a while, due to his going to WSC. W7AFO is the main DXer of Tacoma. How about that annual Seattle-Tacoma and way points bathtub party ? W7BR and W7AG please note! W7FD now signs off as SCM. 73, SS (to the YLs) and 99 are in order. Don’t forget report tk uur new SCM regularly! rrafic: W7BB 94, W7AMO 35, W7ACA 27, W7AG-SI 27, W7TX 22, W7LZ 16, W7ABN 15, W7IZ 14, W7AOB ll, W7AFO 8, W7RW 8, W7MW 6, W7MP 1, W7PH 1 OREGON SCM Wilbur 3S Claypool, W7UN W7MY takes the cake with the highest total ept alive by W7CX. W7ABH makes BPL with deliveries I ( Baker id got RS GA QRQ from HCLFG W7WL keeps three e skeds. W7AHA had the tough luck of having his set torn down by the OM. W7PV is known as the Eugene Super-DX station. W7PE handles some. W7ALM, W7ED and W7WB from Astoria and W6AM paid the Rose City Amateur Radio Club a visit m Armistice Day W7II W7MV is on in the mornings. W7PP is giving up radio. W7WP held a sked on 14 me. with ON4FP W4WB worked WFA. W7AC is going in for traffic. Mrs W7AJX is now W7AHJ. W7UV, W7ALK and W7WY all report. The SCM entertained the RCARC, November 25, with a Hamfest. About 26 were present Traffic: W7MY 166, W7CX 104, W7ABH 64, W7UN 50 W7WL 53. W7WP 102, W7AC 69, W7WB 46, W7AHA 38S W7PE 35, W7ALM 49, W7PY 26, W7IF 24, W7MV 16 W7UV 11, W7WY 8, W7ALK 3, W7AJX 1 reports traffic PACIFIC DIVISION OS ANGELES SCM D. C. Wallace W6AM | Chis is my last report, gang, and all your cooperation 4 ver the last three years is greatly ipprec ited. The Pasadena Short Wave Club will have their regular meeting in the Clubroom at 230 S. Hudson Ave. At the last meeting of the Associated Radio Amateurs of Long Beach, Dr interesting talk. W6CTC is on the Swinerton gave a ver) OST JANUARY, 1930 FOR ir again. W6EHX reports that they took a 132-word message from KAIPW and delivered it to Coolidge, Ariz., within 24 hours. The Associated Radio Amateurs of Long Beach had election of officers Nov. Ist W6EIF, Presi- dent; W6DYV, Vice President; W6CHW, Secretary, and W6EQW, Treasurer. W6DZK sent a message to ARC wishing the new officers success. WFA was QSO’d by W6CUI. W6FJ worked hard on the convention. W6BUX has two UX-210's going in T.G.T.P. push-pull. W6MA reports five skeds kept with W6ZZA at Portland during five days. W6BJX is on 7143 ke. W6AGR is on 7080 ke. W6ZZA is making a crystal-controlled portable. W6DZI is using yne 280 rect. with 600 volts on each plate. Hi. W6ACL worked the Danish Motorship, Tongling, when they were 600 miles south of 8. A. Their call is XOZ7AW on 14,000 ke. W6EKE reports that a station has moved away from next door so that he can operate with less QRM. W6EQD has been on 3.5 me. for past month and has worked all U. S ind Canada. W6BFI is studying for a commercial license W6ESA rebuilt his station. W6ASM wants more stations on the 14-me. band. W6BNY is operated by two brothers. W6CBS worked PYIED. W6AXE was QSO WSBS while they were near Samoa. W6EAF is on 3725 ke. W6AM is crystal-controlled, 1 KW. 6 phase, 7200, 14,400 and 28,800 ke., using W6BAS power crystal ground to exact frequency W6DHM reports that they have two buzz-saws on an 852 and a 210. W6ZBJ is on 7068 kc. W6BZR worked eleven Argentine stations. W6ETJ is using a 201. W6CBW is deserting the poor old 210 in favor of a 204. W6AKW has a fine sked with W2CXL now. W6ABK is putting up a new antenna pole preparing for winter DX. W6AKD handled a few. WOGEAU, W6EUH, W6CZT, W6CUI, W6DKV, W6UJ, W6DLI, W6BCK, W6EPH, W6EQF, W6COT and W6HT all send in reports. Your retiring SCM wishes the new SCM 1 successful two years. It certainly has been great to work with a section like this, where activity is at a fever pitch all of the time. This is also borne out in noting the last three QST Traffic Banners the only three given thus far. rhey all went to the L. A. section. Keep up the good work, men! rraffic: WOAKW 524, W6CBW 219, W6ETJ 81, W6BCK 80, W6BZR 58, W6CBJ 52, W6DLI 45, W6DHM 41, W6AM 38, W6UJ 33, W6DKV 29, W6EAF 28, W6AXE 25, W6CBS 25, W6BNY 24, W6CUI 23, W6ASM 20, W6ESA 14, W6HT 12, W6BFI 11, W6EDQ 10, W6EKE 9, W6COT 8, W6ACL 8, W6DZI 7, W6ZZA 7, W6CZT 6, W6AGR 4, W6BJX 2, W6MA 1, W6EQF 37, W6EPH 12, W6AKD 16. EAST BAY SCM, J. Walter Frates, W6CZR As this is the last month in the intersectional traffic competition between the East Bay and Los Angeles Sections, there was a rreat deal of last-minute work among the traffic stations. W6IP and W6ALX staged a spirited contest for second place among the individual stations and, after several weeks f continuous brass pounding, W6ALX managed to top the CRM of the section by one message. W6ALX worked in njunction with W6SS, the station maintained by the Oakland Radio Club in a booth at the Pacific Slope Dairy Show in the Oakland Auditorium Arena. W6IT, President f the Oakland Radio Club, was responsible for most of the it W6SS and W6OT. The booth contained a a splay ot amateur equipment, literature on the League, nd the FB xmitter donated by W6BJW. One of the r map showing the location of practically operating work features was a D ill the ham stations in the section. W6AQ was instrumental securing the booth and embellishing it. W6IP ran up his big total with some of his extensive Naval Reserve messages. W6EIB was third in the section in spite of the fact that he was left with only one sked when K6DTG was temporarily it of commission. W6CGM was the high man for deliveries; practically all of them secured from P. I. and the Orient Station W6AMW, maintained by Loney and Babcock of the Marine Corps at Mare Island, made its bow as a traffic sta- n and an ORS this month with a big total. W6BTZ also was among the leaders in the traffic work. W6ATT ran up an ndividual total besides acting as a receiving point for W6SS t W6OT, the club station. W6ASH in Berkeley still reports nuch traffic. W6ETA is proving a valuable ORS by her traffic work. W6BI reports that his two UX-210's went west. W6OBYS is working both on 7 and 3.5 me. W6BIW of Pied- ont is pushing his usual punch out on the air W6EDK is still pounding away on 3.5 me. with traffic, official League broadeasts, and Army Net work. W6GEDO says he hopes to have his four-tube screen grid receiver operating soon W6RJ says there is no news at his shack. W6BMS wants to know what he is to do when he QRMs a BCL with an xtal XIII

Page 76

a new man, is getting good 350 volts on the plate. W6EJA re- ting out to distant points, such as El Oakland. Hi. W6CGG is building one n September QST. W6EW received rd in Germany in June. At that time n push-pull TPTG with 300 volts on till pushing traffic when he gets a FB MOPA wrecking the air again raway on 3.5 me. W6EDR says since Berkeley, witl he is spending much time pounding tion, under its new call of W6GB, I station at the East Bay Merchants Exposition. The section call can only be he SCM for purely sectional com- East Bay section stations will answer 1 general call for W6GB. The Oak- 1 smoker during the past month with ew candidates, eats, smokes and other W6ALX 619, W6EIB 324, W6CGM W6BTZ 244, W6ATT 231, W6ASH 170, BI 126, W6BYS 121, W6BIW 10s, W6RJ 40, W6BMS 22, W6CIM IM) 53 BHF 14, W6ASJ 11, W6BZU 8, W6EDR 4 V6sSS 311, W6DWI 97 RA VALLEY SCM, F. J. Quement, v P a newly appointed ORS, topped the list sely followed by W6DCG, who will lost their MG and are now using tube Ww back on 7000 ke. with an 852. W6ESW BAX, W6BYY and NX, all members of uted in radio drills Navy Day. W6BAX ng two Frenchmen, five Australians and drill. W6AME moved to a better yntrolled the set. W6BNH is getting from his High Sierra location. W6YG f traffic. This station is at the Santa ( nder the supervision of F. A. Kazamarek leavoring to locate skeds with the East Modesto Radio Club has applied for W6DQH visited the SCM this month, and ng up in Modesto. FB » W6DCG 46, W6YG 40, W6JU 25, v SW 9, W6BAX 13, W6AME 2, W6BNH r the r€ ISCO SCM, C. F. Bane, W6WB in the section this trip, having over vertainly is great work, Schmidt, and eep it up. WGERK makes the BPL the BPL also, which is FB consider- onitor for a receiver. W6CIS says “ ~vone Iding good, but his Philippine one is 6WN says he will be off until he grinds things are going along FB ial. W6AYT is out after bigger and mnect. W6ERS is having lots of tter. W6PW is doing all sorts of weird W6AST has designed a new receiver n-grid detector that surely is a und do some reporting, if we want FR says pes toc “ree s some competition. Only eight men ch is about 40°; of the usual num- iches us rather late, the entire s to Director Babcock their happi- recovery from his illness W6ERK 198, W6BIP 175, W6CIS VODFR 37, W6DBD 25, W6AYT 8, W6EOP W6ACJ . SCM, H \ Ambler, W the BPL with 50 deliveries ] total messages handled. W6EOP found W6EPF, our new RM, is getting skeds be on soon with a couple of 852’s in I n 7- and 3.5-me. bands. W6BFE will W6CNK has his new generator go- ng on the new set. W6HY is visit and Los Angeles. W6DNW has his W6CTP worked LU with 270 volts A and got QSA5. W6DNS has a new For L. W6CZK will be on with a 250-watt rPl till ORL with the screen-grid detector I W6EPZ 135, W6EOP 42, W6EPF BAM W6CTR 12, W6EOS 9, HAWAII SCM leaves this month for the States and will be back in several months. Reports for the next few months should be SCM, F. L K6CFQ —The Fullaway, sent to Ray Rietow, care Mutual Telephone Co. Biz of K6AV L sends in his last report. He is leaving for good and will be on the air with a WS call. Menge, also of K6AVL, will carry on. K6CIB kept skeds with WSBS, K6CJS and NIJN. K6ALM is still pounding them out K6AXW is going to rebuild to one quarter kw. FB. K6ERH has been testing with fone on 3.5 me Traffic: K6AVL 84, K6CIB 43, K6ALM 12, K6BXW 11, K6ERH 11 PHILIPPINES —SCM, 8S. M. Mathes, KAICY — KAILAC keeps regular schedules with KAIJR. Traffic for Laguna Province should be routed through latter station KAIAF, KAICM and KAIMC have made arrangements for cobperative handling of Corregidor traffic. KALAF will operate two transmitters, one on 7300 ke. and one on 14,500 ke. KAICE, KAIHC and KAICY are handling the bulk of Manila traffic. KA1DJ hands in a splendid traffic report this month. FB, OM. KAILEL is doing fine with a 210. KAIHR is our banner station. KAI PW is handling traffic for north- ern Luzon. KAIRC is still clearing our Cavite traffic KAISC, the Army Net control, may be heard at regular intervals. KA1ZC, operates on Tuesdays and Fridays Hong Kong amateurs are now licensed with prefix VS. No messages can be handled. Shanghai and northern China amateurs still use AC prefix. ACSRV, ACSJK and AC2AL are most active stations. AC9GH in Hupeh may close on account of civil war. All ORS in Philippine Section are revoked as of December 1 to facilitate reorganization Complete new assignments will be announced in next report Traffic: KAIAF 334, KAICY 62, KAIDJ 469, KAIHR 769. ARIZONA SCM, H. R. Shortman, W6BWS W6DRE will be an ORS soon. W6AWD, our new ORS, is looking for skeds in all directions. W6BJF is keeping several fine schedules. W6CWI has rebuilt into push-pull Hartley W6EAA likes his push-pull Hartley better every day W6BWS reports that Bob Reed of W9LK has moved to Phoenix. W6CDU is trying to QSO the Philippines. W6DIB has gotten back to Phoenix. W6EH has been transferred from KGTL in Kingman to the construction department of Western Air Express in Los Angeles. W6ASA spent a few days in Phoenix at the University of Arizona-Pomona Col- lege football game. W6EFC reports being canned at the “ Brewery.’ W6HS-DKX has moved to Phoenix and gone into business for himself. W6DGY is still at KFAD. W6DIE is still jerking soda in his OM’s drug store Traffic: WODRE 82, W6BWS 6, W6CDU 27, W6AWD 28, W6EAA 14, W6BJF 39. SACRAMENTO VALLEY SCM, Everett Davies, W6DON W6EEO is now W6TM and is still keeping up his old record. Miss Sutherland, her brother, and W6DON wish to thank W6TM and KAIHR for their wonderful coéperation in handling traffic to and from the Philippines at the time the brother was sick there. W6BSQ expects to try out W6TM’'s method of handling traffic. W6BYB is on 14 me. W6AFU and W6DYF both report rraffic: W6TM 825, W6BSQ 70, W6AFU 19, W6ODYF 16, W6AIM 15 back ROANOKE DIVISION ORTH CAROLINA SCM, Hal 8. Justice, W4TS N The Route Manager, W4AEW, has dope on ~ most of the traffic handling stations in the Section, and can arrange skeds for anyone. W4OC expects a sked with WILAOF, Africa. W4WI finds that college work and radio don't mix very well. W4JR keeps three 3500-ke. skeds. W4AHH finds QSO North and South difficult. W4TS is getting good results with a 224 screen-grid detector and R.F. amplifier. W4AA-4ACA complains of QRM from elevators and transformers. His station is located at WNRC, where he is an operator. W4DW is attending N. C. State College of Agriculture and Engineering. W4WE is lining up some skeds. W4A BV is servicing BC sets now Traffic: W4ABV 53, W4AEW 47, W4ACI 32, W4WE 25 W4TS 18, W4DW 13, W4AA-4ACA 12, W4WI 10, W4AHH 9, W4JR 8, W4AFW 4, W40C 2 VIRGINIA SCM, J. F. Wohlford, W3CA — W3ARI has been appointed Route Manager and also issued ORS certificate. W3APT, W3MO, W3AHW visited the station recently. W3MO had his license cancelled by some mis- understanding, but is all “jake’’ again now. W3MT loaned his transmitter to W3MO. W3APT is building a new shack QST FOR JANUARY, 1930 now enroute to W3Al at Nc gettin watte json ' air v js a 0 again some band Ww3w riggze truns! now the R Tre W3F\ WI WsH W8H all re with 500-c" The 1 vidua Hunt call worki ing. \ Engla WSAC with appol town tons Tra WsD) U wind anten Unive BCL Tra W6B co Wwoc consis to los at Gre Ing Ov W9AI nicely going worki worki vanta be on quence ke. W air. W seems All st urged SCM’ der Tra 10 G your | don't tions who a ventio it ratl Temot. W4K" South Qs’

Page 77

The ack in uld be Biz of d and lso of ySBS 1 out RH W ii, Y ic for ation ments F will 4,500 ulk of ‘t this IHR orth- raffic wular days 3. No “hina ‘2Al se on 1 are ition port IHR Ss LS, is veral ‘tley day d to DIB rred nt of few Col- the gone DIT wD vies z up ION *rful Ps at ) try n 14

W3AHW has a sked with W2VO at Norfolk. W3PK is putting ar FB. W3ARD W3AGF is a new statior 852 on the air. W3NT is with his 50- W3ALS getting out is still getting out watter. W3WS-W3AAJ is using a MOPA circuit ison with a new receiver. W3TJ, an old-timer, is back on the air. W3FJ has skeds with W3ARU and W3BBW. W3AGH is a new ham at Ashland, Va. W3BGS is back on the air rGTP circuit. W3HY is back after spending W3AHQ is trying to ill on his 3500-ke. phone outfit. W 3BZ is getting n that again with some time in Europe work the phone band. W3ZA talks t W3W0O is working the igain » them $5 and 7-me. bands W3BDZ is working them all around the map Please write to W3ARI if you want schedules 365, W3APT 64, W3ALS 37, W3TJ 9, 1, W3WO 8, W3CA 28, W3MO0 22 WEST VIRGINIA Acting SCM, C. 8S. Hoffman, Jr WSHD WSVZ ured a Chicago, so WSHD 1s taking care of thi all received via radio. Monday with A-A Net schedules. WSOK, using a quarter kilowatt 500-cvecle crystal-controlled set, is State Control The new ruling that station licenses be only issued to indi- viduals, caused WSWK, the Telegraphic Radio Club of Huntington to be cancelled. W8DCM has been issued the ell. WSRI, WSVZ, WSDCM, WSIT and WSDKB are working in other cities. WSBT YV is Alternate A-A for Wheel- ing. WSAUZ visited WSDPO, and was thrilled by working England in the afternoon. The Fairmont gang, led by WSACZ, is heard on consistently. WSADI has a nice visit with WSCAY. WSHD suggests the gang get together and appoint another SCM in view of WSVZ’' working out of town. WSHD does not wish the office, as business obliga- tions make it impossible to properly fulfill the position Traffic: WSOK 148, WSAUZ 46, WSBTV 45, WSHD 34, WSDPO 16 rigged up on 3.5-m« s still working « transmitter. W3CKL now. W3CA worked a few skeds the Route Manager rraffic: W3ARI W3FJ 43, W3HY has se position in s report. The reports given were nights finds the state alive station ROCKY MOUNTAIN DIVISION Y TAH-WYOMING SCM, Parley N James, } W6BAJ W7AAH turns in a nice report. W6R\ P 3500 ke. with low power phone and c.w. The is on wind blew W6EKF's antenna down. W6BAJ also had his antenna blown down. Hi. W6DXM is now located at the University of Colorado in Boulder. W6CNX is QRL with BCL radio business. W7AGV is a new station at Cody, Wyo Traffic: W7AAH 24, W6CNX 19, W6RV 5, W6EKF 2, W6BAJ 1 COLORADO SCM, C. R. Stedman, W9CAA W9CAA leads in traffic this month. W9EAM is doing quite W9EBF has moved to Nebraska. Sorry to lose you, OM. W9BQO is selling all of his stuff. WOEDM at Greeley has applied for ORS. W9ECP at Limon is work- W9DTY can't get out of the backyard W9ABY is a new ham at Greeley. W9DOC is getting out W9CSR has an amateur extra first ticket and is » try phone on 14,000 ke. W9F XW, at Boone, is still working out in fine shape. W9APR is a new Denver ham working on 3500 ke. W9AAC uses two 210's to good ad- vantage. Ex9C DQ is now W9RJ. W9CHYV, the RI, will soon ind will be glad to give hams a check on their fre quency. W9CJC and W9AAB are both operating on 7000 ke. W9CCM has a dud 50-watter that is keeping her off the air. W9CDW is thinking of selling out. W9FBE, at Pueblo, ronsistent work ng out with a 210 nicely going t be on seems to be about the only sign of activity in that town All stations in the state of Colorado who are on the air are urged to send in reports of activity. Reports must be in the SCM's hands not than the 17th of each month in der to make QST Traffic: W9CAA 134, W9EDM 35 10 later W9EAM 25, W9CSR SOUTHEASTERN DIVISION EORGIA-SOUTH CAROLINA-CUBA-ISLI OF (; PINES SCM, M. 8. Alexander, W4iRZ Well J fellows, this section has a new SCM now, and with your help he will put a snappy report in every month, so don’t fail to send in your traffic report and dope on your sta- \{tlanta hams are preparing to entertain the fellows who attend the big Southeastern Division A.R.R.L. Con- vention to be held at Atlanta in December. W4KA finds it rather cold in his basement shack, so guess he will have femote control before long. W4PM W4KV has just received his ORS appointment South Carolina State control station of the A-A net QST tions in ORS soon W4AHA is Wasi will be

1930

FOF JANUARY,

to use AC or DC plate supply We hope W+RZ will be on the air soon wit! i MOPA with fifty-watts power le le whether he uses the latter rrafiic: W4KV 69, W4YA 65, W4RZ 49, W4AHA 30, W4PM 27, W4BO 12, W4PD 2 ALABAMA SCM, 8. J. Bayne, W4AAQ W4AIM the license expire and has obtained the call W4PAI W iW Ne) has a new scree n-grid receiver and rep rts W4iM r 1 W4KP as new stations in Birmingham. W4LM is pre- paring tor a commer al ticket Wily reports alter a long ibsence. W4AAH is back among the traffie handlers again W4VC ts having as good success with his 210 as he did wit! the fifty. W4AHZ is now using a fifty-watter. W4WR, an ex-first district ham, is getting out nicely with a 210 on 3500 ke. and 7000 ke. W4AKM< says the roof to his shack leaks. Hi. WtJX and W4AKP have contrived a unique way of sending pictures by radio. We regret to learn of serious liness and death in W4AJB's family. W4TI and W4IA are seeping a schedule. W4LT has removed to 1750-ke. fone band and broadcasts code practice twice weekly. W4EW has moved to Dothan and is active with fone as usual W4ZI, WAVY, W4FY, W4QM, the gang at Troy, are hav- ng a ivoiding local fone QRM among themselves Che SCM had the pleasure of meeting W4JQ in Montgom- W4AJY and W4ATY have formed a partner- ship and will be active again. W4AHR is kept busy with Army-Amateur work. W4AHP has worked 14 mce., $5 me. consistently, with a little fone work thrown in W4AJR blew his grid leak. W4A KB has installed a pair of UX281's. W4HB sold out to W4FY and is building a new outfit. W4AAQ handled considerable traffic on fone. W4OA still has trouble with his modulation. W4KA, formerly a partner at W4GN is now located at Birmingham rraffic: W4AAQ 34, W4AHP 30, W4TI 20, W4LM 18, W4AHR 16, W4LT 16, W4PAI 14, W4AKM 13, W4JX 12, W4JY 8, W4AAH 7, WIEW 6, W4VC 6, W4ZI1 6 PORTO RICO-VIRGIN ISLANDS —SCM, E. W Mayer, KAKD K4KD and K4AKV copied Navy Day broadcasts. K4AKV reports 14 mc. gone haywire lately K4AGF reports the delivery of a message to New York via W2APYV, who phoned same and gave reply to K4ACF inside »f four minutes. K4KD keeps six schedules weekly. It is the sad duty of the SCM to report the passing of Ernesto Ale- mar, K4AAG, who died after an illness of four months. At taken ill he was all ready to go on the air His passing will be deeply regretted by tennis champ of Virgin Islands, has ap- time erv recently 7 me., the time he was with a new station K4AAN plied for ORS rraffie: K4KD 70 FLORIDA SCM the gang K4AAN 62, K4AKV 12, K4ACF 3 Harvey Chafin, W4AII-W4PAW - W4AGR leads us this month with 106 messages. W4AGR was QSL WFA on Nov. 11. We are very proud to have KDV5 with us again. He would like a few skeds. His QRA s Tenth Sig. Co., Corozal, Canal Zone. W4SK would like a sked with Jax. How about it, W4MF, W4AKH, or some of vou fellows? W3NB's new QRA is 773 N. W. 35th St Miami. W4QL blew out his transformer. W4AKH reports for the second time. FB. W4AGY says more traffic next nonth. W4AKA has now worked 25 states and VE ! and 2 W4AFZ, X9HP is now at Avon Park, Fla. W400 reports that there are five stations in St. Pete. They hope to start a radio club soon. W4SY, better known as “‘Sugar”’ has sure been putting in this month rebuilding. W4TK reports that ng a lot of DX. W4TK reports a new ham in ld Morse operator, using the call W4KW OM, so I can forward you he Ss expecti Jacksonville, an « Please send me your full QRA, some report cards SCM The SCM would like to hear from all the new stations Without reports on the 16th of each month, your SCM can- t tell the gang what is going on Traffic: W4AGR 56, W4AFZ 60, KDV5 105, W4SK 52, W4MF 45, W4AIT 40, WiQL 25, W4AKH 21, W4AGY 15, Wt4HY 14, W4AKA 8, W48Y 6, WOO 6. W4TK 3 WEST GULF DIVISION KLAHOMA SCM, W. J. Gentry, W5GI Hats O off to Hardin of W5CB and Ehret, W5APG, for their fine totals! FB, OMs. W5AYF reports. Shaw- nee has two new hams, W5AFH and W5BJJ. W5GF blew his 852 and high-voltage condensers. W5SW has been sick. W5MM is rebuilding. W5AGN has a new receiver. W5AUV is going good now. W5AAV has a couple 210’s with a 140 watts input. W5QL works 'em all. W5VH is going to business college. Please don’t forget that reports should be mailed 1 the 16th of each month X\

Page 78

W5APG 59, W5AUV 27, W5AAV 15 XAS SCM, J. H. Robinson, W5BG BPL again. He has been keeping skeds e Station. W5FC has been keeping a nformed as to the condition of his lexas. Good work, OM. W5RJ says he ¥ are OK. W5AAE has been using fone \ skeds with W5WW and W5BAM W e much to report. W5BAD reports indled lots of traffic during the Ellis s having lots of trouble with his 150- ; the Boy Scouts are giving him lots dusted the cobwebs off the 250-watt et and is on again 101, W5FC 240, W5AAE 88, W5BAD 8S ( v AM 34, W5GZ 18, W5DF 14, W5JD 5. W L 1, W5RJ 92 rEXAS SCM, Robert E. Franklin, Vv Y makes the BPL both ways this month DX very good. W5BBY says he is e of the other fellows step to keep up ll keeping some good skeds. W5AEA f traffic. W5TD is one of the con- rhe SCM is on most any evening W5AHB 83, W5BBY 63, W5AJD rp 15 SCM. Wheeler, sppreciation to you fellows who, Leavenworth hall do my best to serve you and s reporting, I know we can put this : eet again. W5TV leads the Section with ude possible by three daylight skeds terested in the U.S.N.R. W5AO0D s shack. W5AJL has rebuilt his en- D r AA State Net control, is active peration holding down its link in a te. Any further active stations in the S mmunicate with the SCM. Remember show the country that there is a 88, W5AHI 75, W5AJL 26, WS5AOD 15 CANADA QUEBEC DIVISION CM, Alex Reid, VE2BE — Your SCM ( ) ted Canadian General Manager. Ih SCM, I wish to thank all members in stance they have rendered me for the duties as C.G.M. on vill receive the same whole-hearted I take over my in Canada, and can assure receive advice and criticism from dream of an all-Canadian Traffic nd before this goes to press it is be moving over this new Canadiar e holder of a WAC certificate. Mrs regularly. VE2AC is going t e the pleasure of an interview wit! 2BD has a new transmitter. VE2BH with erystal control. VE2AX is two fifties. VE2AP is using ar . Y sends in his second traffic report and V E2AC again enters the BPL. VE2BB t n his recent letter in QST VE2AY 10, VE2BB 11, VE2BE 35 VE2ZAL 8 ONTARIO DIVISION : VE3Ft \I I Cc rhompson ( ) VES3BC leads the Section in traffic ets a wonderful example of what car perseverance and a few schedules e traffic total due to his schedules SDAW. VESDA has been doing some VE3CB keeps a schedule daily with e link of a proposed Trans-Canada itacts with other stations in one sorry to record that VE3CJ has re- s always a silver lining to any cloud, SBO, who will carry on. VE3CL says w over and that everything with him is FB. VE3BP has a MOPA transmitter working on 7 me. Eastern District: J. H. Hewson, VE3XM VE3IW works all districts on a telephone wire aerial and an 852. VE3XO hopes to soon acquire a pair of 852’s. VE3XQ has moved to Kingston. VE3XM is still doctoring Movietones. Northern District: VE3ET wants a “checker playing sked” with some fiend of that ilk. He reports that VE3DM at Coldwater will be on the air on 7 and 3.5 me. by the time this is read. VE3GG is now at Hydro Sandy Falls, and is using an old 202 with about 25 watts input on 7 and 14 me. VE3DP at South Porcupine is knock- ing ‘em all dead with a battery-operated pair of 210’s, VES3EN now of Schumacher, is preparing to ditch the YLs alter five years at and get back to his first love, «a nice li'l low-power trans- mutter Traffic: VE3BC 70, VE9AL 20, VE3DA 16, VE3CB 11, VE3ET 10, VE3BO 9, VE3CL 6, VE3BP 3, VE3FC 3 VANALTA DIVISION RITISH COLUMBIA —SCM, J. K. Cavalsky, B VES5AL — A 3500-kce. traffic net is under construction and it is hoped that we can cover the whole province and the state to the South. How about some of you boys in the interior joining up with the gang? VE5AK is hitting out on 14 me. VE5AN has a MOPA set using a couple of 201A’s. VESCF is busy at night school. VE5BM is still holding down his sked with VES5GT. VESCN is working nights. VE5DD is rebuilding his set. It is rumored that VESHB is coming back on the air. Glad to hear it, Fred. VES5AL boasts a nice new mast. VE5AC has a new op now. Congrats, OM VESCW is building a MOPA set. The Vancouver Island stations are coming to life. VE5CT is hitting his old stride with the Belgium tube. VESCO has a class of boys under tow and is trying to teach them the code. VESCE is on the 7000-ke. band. VESBR at Savary is leading the gang with skeds. The second op at VESBL is holding down the key while the first op is at sea Traffic: VE5AC 13, VESBR PRAIRIE DIVISION ANITOBA SCM, A. \V Chase, VE4HR M VE4DJ leads the gang in traffic. VEABQ, VE4DK and VE4GQ are carrying out experimental work on 28 me. VE4JB is experimenting with a screen-grid receiver VE4IC has discarded the 201A in favor of a UX-210 VE4DK has been heard in Brazil and New Zealand. VE4BQ ind VE4GQ have been appointed ORS Traffic: VEADJ 14, VE4BQ 12, VE4HR 11, VES4IC 10 SASKATCHEWAN SCM, W. J. Pickering, VEtFC VE4IH certainly turned in a nice traffic total this mont A crowd from Moose Jaw dropped in on the Regina bunch on Armistice Day and spent the day visiting ham shacks VE4A0O sold his M.G. and is wondering what to use for power supply. VE4HO has changed his location. VE4AS and VE4HL managed to bridge the gap between Moose Jaw and Regina. VE4EL buried his 210 recently rraffic: VE41H 51 VESAK 3, VES5AL 18 LATE AND ADDITIONAL REPORTS W6BTX has been sick for a while so not muca traffic to show. W3GS sends in a good report this month rraffic: W6BTX 21, W3GS 66. or deliver n= —

Page 79

on7 13.0 W 852. 2 has ones ked , M at time rs at Watts 10ck- 10's, YLs rans- B 11, Isky, ction vince ys in xz out LA's. lown SDD ming sts a OM land tride inder 1 the with . key s R iDK *k on iver -210 1BQ 10 nth unch p for AAS ‘THE GOOD WILL & @& OF GJ i MAN BEHIND THE GUN”, Poinee que bee repetlete Taper plate 191-E Ideal for short wave receivers gland, Transmitting type 164-B Capacity—.00022 mmfd. a euacite do Rasa mike penuate Se) minds \raamando come lan anda _—————— C A R. DW E L L anal Condensers in all standard capacities. Transmitting Condensers for CON DENS ERS powers up to 50 K. W—Fixed (Airdielectric) transmitting condensers. One for every tube and purpose, and each one an engineering SPECT STREET » od od oklyn, N. Y. We have prepared literature which we would Allen D. ‘ ° IF yOu, ALER DOES NOT). ni sts will I saguiil =— filled. Now, more than ever—Cardwell Con- ee a A AE ee . . . _ LT densers are “The Standard of Comparison.’ QST FOR ' Say You Saw It in QST — It Identifies You and Helps QST 65

Page 80

= > RADIO BOOK and is in constant use ; Gov't and over 300 Univer- rechnical Colleges in this ries. it yrsed “Radio Theory and Operating” Mary Texanna Loomis , Loomis Radio College tute of Radio Engineers By and enlarged to 992 itions and right up to date. Leather binding. revised ce $3.50 Postage Paid vokdealers throughout iny foreign countries, or hased direct from the pub- check or money order to Lot PUBLISHING COMPANY D Washington, D. C. RADIO BARGAINS Fully Guaranteed At Less Than Manufacturer’s Cost Short Sets, one tube, complete with ees 6% 2 6b wee ese 6 250 Po mplifiers. $19.75 7 tube A Chassis completely assembled with 24.50 16 M ondenser Blocks 500 to 1000 $3.90 No. 104 wer Transformers, shielded. Sec. ( C. T. to case, 1% V., 281, one 250, one 227, and $5.00 No. 8 insformer. Sec. 375 V.-375 V. i1 V. High and low pri. take care of 10 A. C. tubes . $4.25 Vitrifi ver Pack Resistances. 180 volt 1 lat 1500, 7800, 15,100 and 90 Mic formers 95c. UX 281 type es $1.75. 250 tubes $3.50. 1.35. 224 tubes $1.95. 210 tubes $2.7 95c. 171 tubes 95c. end for Free List _wraé ‘ CHAS. HOODWIN CO. 4240 Li n Ave. Dept. A-8 Chicago Bankrupt Radio Stocks | Say You Saw It in QST — It Identifies You and Helps QST Hawaii. 0300-0400. seasonal Dutch East Indies. 1200. pkljr. seasonal South America Argentina. 2300-0200. lu9dt, lu3dh, lu2ca Brazil. 2200-0100. pylaw, pylca Chile. 0000. celai, celah, ce2ab Paraguay. 2300-0000. zp7ab Peru. 0300-0400. oadq, oa4s Uruguay. 2300. cx2ak, ex3ah Remember that the above is for 14,000 ke., and will vary somewhat from the times stated. Some of the stations listed may be off the air, too. But it is intended only as a guide, and as such seems to be pretty darned keen. Use it. More tables next month, including one from W6QL for both 7000- and 14,000-ke. bands. And now for some reports of foreign activity. All of the reports herewith came by the time- honored mail route, but we have high hopes for some radio’d reports in the near future. Step on it, gang. DANISH SECTION By Helmer Peterson, 027s Conditions have not been good lately, due mostly to the great amount of QRM and QRN. On the 7000-ke. band many signals have been heard in the early mornings. ZL came in espe- cially well. W1, 2, 3 and 8 were heard, but gener- ally weaker than a month ago. During the day all Iurope was heard up to about 1700 GCT, after which European signals faded out. Conditions on 14,000 ke. are rather bad, and not at all constant. ZL and VK, and sometimes CE, LU and PY are heard, from about 0630 to 4900 GCT, but their strength is inferior to that of a month ago, and some mornings the band was quite dead. During the day most of Europe and North Africa could be heard with moderate strength. On the 28,000-ke. band conditions have been bad. Harmonics from commercial stations were the only signals heard, although it is worth not- ing that these were received with excellent signal strength. BRITISH SECTION By J. Clarricoats, G6CL One of the chief events during the fall was the Fourth Annual Convention of the Radio Society of Great Britain in London. Well over 100 ama- teurs attended the various meetings, and real “ham spirit’’ prevailed throughout the proceed- ings. The convention opened with a lecture de- livered by Mr. H. M. Dowsett on beam radio stations. A meeting of the District Delegates, at which all British areas were represented, proved most interesting, and many helpful suggestions were passed to the Headquarters staff. During the main business meeting, the election of new repre- sentative and district managers was made. The following are the names of Representative Mem- bers for 1929-30:

Page 81

and yme But ms “om ity me- for rit, due tN. een 1er- all ter und | to t of vas und ate pen ere ot- nal the ety na- eal ed- de- dio at ved ons the re- ‘he

Every Transmitting Amateur Uses These Forms —a reminder that your supply may be low—

mw wes AMERICAN RADIO RELAY LEAGUE . : = § LOG OF STATION A.R.R.L. Log Sheets _ a a tl for $1.00 or 500 for $3.50. Members’ Correspondence Stationery en

One color (black) heading now being used at greatly reduced cost to members.

Write vour radio letters on League sta- | 3 THe ay tionery — it identifies you. . - | » Lithographed on 84 x11 heavy bond paper. aie 100 sheets : 50c 250 * ....$1.00 a $1.75 me wif (Postage Included)

f == THE AMERICAN RADIO RELAY LEAGUE

¢ HEAQQUARTERS HARTFORD CONN U & A ¢ RADIOGRAM Official A.R.R.L. Message Blanks eanTroaD con __|__ am oy ecto _-a7_| Most convenient form. Designed by the bie Communications Department of the eect — - - P oe ~— A.R.R.L. Well printed on good bond

paper. Size 8% x 74. Put up in pads of 100 sheets. One pad postpaid for 35c or three pads for $1.00. @ELAY CHalh BEINO ORGANIZED BY BINDS OF LiL IPOIS TO OPERATE SETWHED THE PACIPIC COAST AMD CHICAOO CALLS POR CA.OSEST COOPERATIU® BETWEEY 108A AND [ic INOIS STOP SU0- Q@ST Tuat YO. COSMUNICATE CITE G8aPT OW THE SUBJECT | LOUIS B SUBER |

Ca py poet saison Cs ell 4/28 8.33 p | RA DIOGRAM AMER AN RA RE A t Message Delivery Cards Neatest, simplest way to deliver a message to a near-by town. On U. S. stamped postals 2c each. On plain cards (for Canada, etc.) le each, postpaid.

American Radio Relay League 1711 Park Street Cw Hartford, Conn., U.S. A.

Say You Saw It in QST — It Identifies You and Helps QST [=r] “I

Page 82

Licence Manager G. Marcuse, G2NM oD Social Manager J. Clarricoats, G6CL sill acct Publicity Manager A. Watts, GGUN QRA Manager M. Pilpel, G6PP QSL Manager D. Chisholm, G2CX Honorary Editor G. Thomas, G5YK Contact Bureau G. Powditch, G6VIL ‘ The appointment of Mr. Watts as Publicity Manager has created much interest in our society, o and it is hoped that in future the society will extend its sphere of activity into many new lands, w Members of foreign and colonial societies are invited to apply for membership in the R.S.G.B, b would you buy The subscription per annum being 15/-. All in- to hook a tarpon? quiries should be sent to the Hon. Sec., 53 Write f Oe a, en Victoria Street, London, S.W. 1 . — : ' capable of doing. So many of the Colonial receiving amateurs joining R.S8.G.B, New Ca IT peuuire ‘a'sccond thought.” | will, in future, be entitled to use a special iden- . aE. ~ pict - a “| tification number. These will take the form of Ks. Yow cant take Taree OF ft) aay. | B.E.R.S. (British Empire Receiving Station), 1, unt five thousand like this." They 2» 3. ete : second thought. And we spe ps, ome ‘ , P si F in giving it to them! Receiving stations within the British Isles will fer you specialized Resistor knowl ° " efficient production system, abso continue to use B.R.S. numbers « = yt pom - if The convention concluded with a dinner at- | Hee ner oe eee eat will sive us an | tended by over 100 transmitting and receiving L pportunity to deliver what we promise. amateurs. Mr. Gerald Marcuse, President of the pore: ESISTORS Society, took the chair at all meetings. HARDWICK, HINDLE, INC. eaeennmglannias Sales: Factory: By W. Rach, D4AL, Sec’y, D.A.S.D. 122 Greenwich St. 215 Emmet St. New York City Newark, N. J. DX conditions on 14,000 ke. have improved - somewhat. Among other amateurs, D4YT was able to work all continents during September and October and to get R9 reports from most parts of | - yy ASY to Get a the world. His input was 400 watts. sinh D4BY continued his work from a small boat . on a lake near Berlin, and with 4 watts managed I i \ N DBOOK to QSO ZL, VK, LU and PY . aes D4AN reports fine results with a new 300- Sixth Edition) watt anual rig. Cc DIRECTIONS: D4AAR in Saxony is a newly appointed WAC member, and is very proud of it Reali that Handbook must be IMPORTANT.—Owing to some trouble we are had, proceed as follows: compelled to ask our foreign friends not to give | me (1) Fill out below, tear off. any messages to D stations for delivery to a third party. (2) Reach in pocket, produce ----— L.S. A. SL bill, old or new Note that last paragraph, fellows. It means we don’t care). that for the present you shouldn't try to shoot (2) 4 » tanethhen. manl® cn any message trafhie into Germany unless it is a © P message intended for the station you are working. — ee ee ae No ‘third party”’ traffic, in other words. al Handln Factory. 711 P Hartford. | POLISH NOTES SI r AT ONCE. | By the Lwowski Klub Krotkofalowcow ‘ Activity in amateur work in Poland has been 1 munca stimulated greatly during the last year. The L.K.IX. has added considerably to its member- ship, and has divided Poland into five districts, treet or P. O. Box) ; ian aay for amateur purposes. These districts center = - ee around Lwow, Warsaw, Krakow, Wilno and Umy end State) Poznan. District managers are appointed to head : each district fae Say You Saw It in QST — It Identifies You and Helps QST

Page 83

“ity ty, will ids. are .B. : of rat ed (- \C rd Ss NS THORDARSON DOUBLE FILTER CHOKES CONTAINS TWO 18 HENRY 250 MILL CHOKES This Thordarson heavy duty, rugged double Filter Reactor is excellent for Filter Cir- cuits in Transmitters, Power Amplifiers, ““B’’ Eliminators and various other purposes. Each Choke has a 2000 Volt insulation and the D.C. resistance of each Choke is 108.5 ohms. When connected in series this Filter Reactor has a capacity of 36 henries at 250 mills, and when connected in parallel 18 henries with 500 mills carrying capacity. Weight for shipment 14 pounds. Dimensions 3 x 7 x 5 in. Equipped with mounting brackets. : SPECIAL $@-25 MODEL T-2458 List Price $19.50 Dubilier High Voltage Filter Condenser 4 MFD. D.C. WORKING VOLTAGE 600 V These Filter Condensers are designed for use in filter circuits in Transmitters, and all high Voltage Socket power devices and Power Packs. SPECIAL EROVOX = Dubilier 7 MFD. HIGH VOLTAGE FILTER CONDENSER BLOCKS Finest non-inductive High Voltage Filter Block ever made. Designed for use with UX-250 Power Tubes but can be used safely in filter circuits of transmitters or high SPECIAL power Amplifiers in any combination of capacities desired. 1 YPE PL 571 List Price $7.25 i Furer 1 CONDENS ER Biock Each Unit is equipped with long, heavy, flexible leads, convenient for easy wiring, and also has mounting i ie th SIZE 6” x 5” x 316” brackets. Latest design. “y 25 The insulation resistance of these Condenser RATED D. « Blocks is in excess of R.M.A. and N.E.M.A CAPACITY WORKING VOLTAGE **#2dard requirements 2.0MFD. . .. . 1000% Due to the request of manufacturers of these PER BLOCK ee. 8 es. Condenser Blocks we cannot divulge the high eS eee e es so Qe list price of same. BS cece ecs « OY 50 HENRIES FILTER CHOKES 85 MILLS These are very efficient Chokes for use in Filter Circuits for your SPECIAL Transmitter, A and B Eliminators or Power Packs. mf aa oe -50 _ The Choke Coils are very well constructed and are made with air gaps to prevent magnetic saturation from direct current. aradon or POLYMET 5 MFD. HIGH VOLTAGE FILTER CONDENSER BLOCKS This condenser block is ideal for use in “‘B”’ eliminators, Power amplifiers and experimental work. 4 mfd. D.C orking voltage 400 v. { mfd. D.C. working voltage $00 v. gppegag SI-S° pep BLOCK AMERICAN SALES CO., 19-21 Warren Street, New York City [Se Say You Saw It in GST — It Identifies You and Helps QST

Page 84

etlt _Y to SATISFY DXNers”’ who are always trying ise your receivers into doing an 10 miles or so are hard on volume Here's one that will satisfy ts approximating 10 years’ mse fail to develop signs of esistance variation. ' element permanently fused meled metal plate dissipates ure silver floating contact smooth step-less operation proves with use. Metal cover, iveted — Bakelite insulation. for every volume control 2.40 to $3.50. Write Dept. Qi for Super-TONA- TROL circular. DOD* ol | PR “MOST gested as you makes t put too m a pred of the su ‘For FIXED VERY Bt SIMPLI BOLS A> “Tome chart ar consetan freely REPO! Ahbov: apeed | Much tention Radio > order. |! send On Box 100 -E RADIO SHORTKUT CAKLY MEMORIZED SILY VISUALIZED ODUCES RESULTS From W5QN me from DRS was the sug- ed visualization of the symbols m grouped on your chart which ery simple and easy. You cannot ress on this point as visualization he imagination which is a product ious mind. he code symbols must be FIRMLY HE SUBCONSCIOUS MIND. THE YAY TO DO THIS IS BY THE ESS OF VISUALIZING THE SYM- LPED ON YOUR CHART. lay co by without going over that isualizing the symbols. Speed is sine and can now read code » 500 Users co with DRS. »nd report to mention increasing er by use of DRS, visualization when given at- . High Speed $2.50. Money \dd 50 Cents. C.O.D. in U. S. if C. K. DODGE Mamaroneck, New York Say You Saw It in QST — It Identifies You and Helps QST We have also started an official publication, called KArotkofalowiec Polski, whose editor is Stanislaw Kozlowski, SP3BB. In addition, short- wave publicity has been disseminated as far as possible. In the recent elections in the L.K.K., the fol- lowing officers assumed office: President Lt. Stanislaw Komarnicki, SP3CG Ist V.P. Ing. Adam Ebenberger, SP3DX 2d V.P. Dr. Tytus Vrabetz, SP3DR Secretary Jan Ziembicki, SP5AR Treasurer Karol Kulawik, SP3LV Directors Stanislaw Kozlowski, SP3BB, and Zbigniew Bartz, SP3FS It will be noted that the prefix SP has been adopted to supersede the old ET, and the figure 3 used to designate all calls. Down to the bottom again. Incidentally, we had a brilliant idea for getting in reports from our various member societies. That is, we think it is brilliant. The scheme would be to run a heading for each country where there is an I.A.R.U. mem- ber society. We'd do this each month. If we didn’t get a report from that society, and couldn't generate any items about it, we'd say so, but we'd leave the heading. On second thought we see disadvantages to this. And yet, it might work out all right. Well, we'll think about it. REGARDING THE FEBRUARY INTERNATIONAL TESTS We thought the paragraph above ended the department for this month, but since writing it Communications Manager Handy has asked that we insert the following item especially for the attention of foreign amateurs in connection with the forthcoming international tests: Attention: All hams in localities outside the mainland United States and Canada. A number of letters and radiograms have been received asking about the Relay Contest which will be held February 15th to 28th in- clusive. Here’s the dope in brief for all of you. 1. Read pages 39, 40, 70, 72 and 74 of Decem- ber, 1929, (ST — also the dope this issue. 2. During the work as many States and Canadian stations as possible. 3. Each station worked will give you a short test message with a special number. This counts United tests one in your score t. Write a reply of ten or more words, give it the same serial number, and send it to a different United States or Canadian station than the one from which that serial number. This counts two in your score. 5. Work as many stations as you like to run up the score. Though it’s not possible to get more than three points for each station worked, you ean doubltess work many stations during the contest. Turn in your confirmations promptly at close of the contest 6. The summation of all the points made with individual stations is to be multiplied by the number of United States and Canadian districts you got see Rule 6). 2222 2erecsc7 25 PErPgose FoSEREL MERE ped

Page 85

VULUUULULULUU Ata HU ere’s the Answer to every question about the principles, methods, or apparatus of radio transmitting and receiving. A complete course in radio operation in a single volume. THE RADIO MANUA A New Edition Complete new chapters on aircraft radio equip- ment; Practical Television and Radiomovies with instructions for building a complete outfit; radio interference; 100°; modulation; latest equipment of the Western Electric Co.; the Marconi Auto-Alarm System; and many other developments of the past year. All this informa- tion is added in the new ‘edition and, besides, the entire book has been brought right up to date with much new material. The Radio Man- ual continues to be the one complete and up- to-the-minute handbook covering the entire radio field. A Complete Handbook of Principles, Methods, Apparatus for Students, Amateur and Commercial Operators, Inspectors By G. E. STERLING, Radio Inspector and Examining Officer, Radio Division, U. S. Dept. of Commerce. Edited by ROBERT S. KRUSE, for five years Technical Editor of QST. 20 big chapters cover: Elementary Electricity and Magnetism; Motors and . Generators: Storage Batteries and Charging Circuits; The Vacuum Tube; Cir- cuits Employed in Vacuum Tube Transmitters; Modulating Systems and 100% Modulation; Wavemeters; Piezo-Electric Oscillators; Wave Traps; Marine Vacu- Complete um Tube Transmitters; Radio Broadcasting Equipment; Are Transmitters; > bone Spark Transmitters; Commercial Radio Receivers; Marconi Auto-Alarm; Radio I reparation Beacons and Direction Finders; Aircraft Radio Equipment; Practical Television for and Radiomovies; Eliminating Radio Interference; Radio Laws and Regula- tions; Handling and Abstracting Traffic. An immense amount of information never before available including detailed License descriptions of standard equipment is presented. ° hi Examine It Free .,. Order On This Coupon Government ” a * 7 . —"- o Ne suuntesnet af tole theses ead qe D.VAN NOSTRAND CO., INC., 250 Fourth Ave.,N. Y. 9 yperati cen CO ressed int : single volume as in this Re- a Send me the Revised Edition of THE RADIO MANUAL 4 vised Edition of THE RADIO MANUAL. Here is information g for examination Within ten days after receipt I will either . that otherwise vou could s re only by consulting many differ s return the volume or send you $6.00. — The price in full. e t k \nd t letail is vouched for by authorities of the rhe Manual is profusely illustrated with hundreds of Ld \ = " { diagrams Ther are 900 pages, bound in (| PPP Prrrrrrrrrvrerererrrrerererererririee esees e tbrikoid that is extremely durable. The immediate de . (QST 1-30) s \ handbook will quickly exhaust the first S St. end Number... Pere Re i ry be iving your copy without delay, order s a I The volu will be sent for free examination. Pay or e return in 10 days -~ City and State e a | een - - Say You Saw It in QS7 It Identifies You and Helps QS7 71

Page 86

HARNESSING A MIGHTY = POWER | with which you have succeeded in communicating | during the contest in determining the total score, 7. Certificates of Merit in our Third Interna- tional Relay Competition will be awarded the winning amateur stations in each foreign locality or country as determined by the list of inter. national prefixes. (See a photograph of one of these handsome certificates elsewhere in this issue of QST.) The frequency bands that will be used by your Radio! oothly flowing, clear re- : icate, intricate network of co ind transformers — cas- ca amplifications tube by tube. Such power must be har- me i if the result is to be cel nm \ CENTRALAB volume control in ir radio does just that... u does it smoothly... si- len .. surely. It means much if r radio is CENTRALAB eq ped. C lab >» ,entrala ( tral Radio Laboratories 20 Ke« Ave. Milwaukee, Wis. 2 Testers you need at a price you can afford Simp! tre Ratest H T Tests Scr t ». Ratest Pocket $7 50 ~ie 3 ; Oscillator t. A combined high and low ty tester; furnishes signal for d r final « king; tests mall and ir condensers sly efficient ipact rad VOrTkK. ube ( Both the Pocket Oscil- lator and Tube Checker are shipped on 3 days’ trial. Purchase price refunded by express agent, if you are not entirely satisfied You can't lose | the best 319.50 you ever NSTRUMENTS COMPANY Miss. nwood, Say You Saw It in QST - It Identifies You and Helps QST United States and Canadian amateurs lie between the following limits: 14,000—14,406; 7000-7300; 3500-4000; and 1715-2000 ke. Those who can use 14,000 ke. will find it to their profit to do so in these tests to make 100% use of the 24 hours in every day. A word of caution: North American amateurs working outside their assigned frequency bands will disqualify both themselves and stations they handle test messages with and make it impossible for either to receive a certificate in case they should qualify for it. So see that stations you work are INSIDE whatever band they are near before you call them. You may use any frequency permitted by your government’s regulations. Better get your station ready for the tests NOW. If you can’t receive on 3500, 7000, and 14,000 ke., you are going to be handicapped in the tests. The transmitter should be able to go quickly from one band to another too to make best use of all the operating time. Do the best you can in the February Contest and let us have a report of each and every score for QST. Even if it proves to be only ‘‘1,’’ due to hard luck in burning out a tube, we want it just the same. Here’s luck to all. Looking forward to February 15th and to your reports. — F. FE. H. A Power Transformer for the Lean Purse Continued from page 25) which had been removed is next replaced and a 14-inch hole is drilled in each corner of the core for the mounting bolts which also hold the core together. Before making the final connections and mounting the terminal strip, the voltage delivéred by the filament winding should be checked. Connect the filament of a UX-210 (or of two UX-210’s in parallel) to the filament winding terminals and excite the primary from the 110 volt a.c. line. The voltage across the filament winding should be 7%. If it is too high, remove turns from the winding until it is correct. The filament winding may now be taped. The honeycomb coils should be connected as shown in Fig. 1, the two 1500-turn coils being in the center and the 1250-turn coils at the ends. The inside connection of one coil should be connected to the outside lead of the next, care being taken to keep the leads insulated from the windings and other leads. The leads from the primary, filament and high-voltage secondary are brought out to ‘ /

Page 87

urs ids ey ble nd dd. vO ng Operators on board ships see the world with practi- cally no ex- pense and make $85 to $200 a month besides. Hundreds of operators will be needed soon for com- mercial land stations being opened in our leading cities. Broadcasting stations need trained men continually for Jobs pay- ing $1,800 to $5,000 a year. Servicing sets is paying N.R.I. men $200 to $1,000 a year in spare time. Radio Facto- ries employ thousands. Salaries for well-trained men range from $1,800 to $5,000 a year and over. give You 8 Outfits of Radio Parts fora experimental Laboratory With them you can build over 100 cir- cuits. A. C. set circuits, screen grid tubes, push pull amplifica- designed for all types of vac- uum tubes in all types and stages and others Home ; — 3 tion, circuits ire included. build the tundamental Fr eu f tube reen erid uned Radio fre uency et that he YOU RE WANTED fra Biz P, many $50, $60, $75 and $100 a week jobs opening every year. Why not capitalize on work that is fun to you — get in the field get some of the good jobs that are open- ing regularly. My Employment De- partment is getting three times as many calls for graduates this year as it did last year. Pick the job you want Pll train you quickly to 11 it You've got a good start towards success in Radio. You are the logi- cal man for this work you are deeply interested in Radio and with a little more preparation I am sure we can fit you for one of Radio’s good jobs. Many amateurs have stepped into fine jobs after completing my course. Read their letters in my book “*‘ Rich Rewards in Radio.” Television and Taiking Movies are included Principles underlying Television, con- structing Television experimental ap- paratus, Radio's use in connection with Talking Movies, by Rail- roads, in Aviation, Broad- casting Stations, Shipping Companies not one branch, but all of them are cov- ered. You're those using u experiment with and circuits used in Majestic, Radiola, Stewart-Warner, Zen- ith, Philco, Edison, Stromberg-Carlson, ] and other sets. \ 2 | - _ 4 l Dear .) ] 64-pag« I Name , Addr | ; Pf City. (awed | Ur. Smith book ‘‘ Rich Rewards in Radio.” Job job” man when you finish my course. You're ready for a large number of them. Lifetime Employment Service I not only train you quickly and inex- pensively at home during your spare time, but when you graduate I help you find a job. The services of my Employ- ment Department will be open to you as long and as often as you need its help. Your money back if not satisfied The day you enroll I will send you an agreement legal and binding upon the Institute to refund every penny of your money when you complete my course if you are not satisfied with my lessons and instruction service. You are the only judge Get my book at once I couldn't begin to tell you all about the many features of my training in this small space. So send for my book. K won't cost you a cent and you won't be under the slightest obligation. Clip and mail the coupon at once. J. E. SMITH, President, National Radio Institute, Dept. OA 46, Washington, D. C. THIS COUPON IS GOOD for COPY OF My BOOK J. E. SMITH, President, YY National Radio Institute, Dept. OA 46, Washington, D. C. — Send me your new eee Say You Saw It in QST — It Identifies You and Helps QST 73

Page 88

90J Grange, IIL. says: New Super Wasp AC Short Wave Receiver 4) a Isa Wow! *hone Broadcast first night Comes in kit form or nstructed. Ham-Book FREE E ng for Hams. Crystals and ( Holders. 3000 volt new type is bulbs ($10.00). If it’s good, day for your free copy Chicago Radio Apparatus Co. Dept. Q 415 &. Dearborn Street , Chicage, I11. rhe NEW Martin VIBR O PLEX No.6 Vibroplex: Bug: Lightning Bug ictive Colors le Green In Att The sn Red est, cas workin on th ket 18 Featur or slow A @rea for amat — Black or i $17 Nickel-Plated........ $19 Famous Improved VIBROPLEX Used by tens of thousands of operators be- cause of its case and perfection of sending. Black or $17 ., $19 Colored. . Nickel- Plated Special Radio Model «tra Large. Specially - Constructed Contact Points without relay. Black or $25 Yo oplex accepted as part payment j Voney Order or registered mail use THE VIBROPLEX COMPANY, Inc. - Broadway, New York City Ce iress: * VIBROPLEX "' New York Say You Saw It in QST — It Identifies You and Helps QST the binding posts on the terminal strip which ig mounted on two U-shaped pieces bolted to the core. The secondary should also be taped and the whole transformer given a good coating of in- sulating paint. This improves the appearance and gives better insulation. Using the two 1500-turn coils only, the plate winding delivers about 375 volts each side of the center-tap to a full-wave rectifier. The entire secondary winding delivers about 685 volts each side. The lower voltage is the only one which has , the rectifier being either a 7 been used so far, UX-280 or a pair of UX-201-A’s in a full wave circuit. 20 meters) and uses two UX-210's. Two out. of 7 three reports are “pure d.c.”’ or ‘‘xtal”’, and the UX-201-A’s deliver just as much plate current | (70 milliamperes) to the transmitting tubes ag the UX-280 does. , For a filament center-tap, two 10-watt, 110 volt lamps are connected in series across the filament winding with the center tap connection to their mid-point. This arrangement has been giving f.b. service. A high-resistance ‘‘bleeder’’ across the output of the filter is used and recommended. It saves filter condensers and discharges the filter when the set is shut down. The honeycomb coil type of secondary might be used for higher voltage secondaries (if the current required by the transmitter is not too great). The dope for transformer design will be found in the Handbook. Plate Supply Filters and Keying (Continued from page 40) More voltage (average value as read by a de. voltmeter) can be supplied to an oscillator tube than the transformer secondary is capable of supplying at practically no load to a high r- sistance a.c. voltmeter. A filter may be laid out in such a manner that a transformer giving 750 volts a.c. on each side of the center tap may actually deliver 900 volts at 125 milliamperes. Peak values of voltage across the rectifier output may reach much higher values than 750 times 1.41, which helps explain why so many condensers so placed are mysteriously blown. Those same condensers and choke coils can be rearranged 80 that this same transformer will not be capable of supplying more than 650 volts at 125 mil amps. To explain this consider a simple case. Take a transformer giving 750 volts effective on each side of center tap at no load and place 4 good condenser across each half (no rectifier tubes) and measure the voltage. It may be well over 1000 volts effective if the condenser is large enough and good enough. Take a pair of resist- ances each of which is adjusted to draw the same current as the condensers did, and substitute them in place of the condensers. The voltage now may be 700 volts. A pair of choke coils, each draw- ing the same current as the condensers or Ie sistors, will show a still lower voltage. The better the time constant, (the L/R ratio) the greater will be the drop. Much the same results are ob The transmitter is operated on 14,000 ke, | —, - 9 ne The Ce The Pr 7.00 p

Page 89

te he re on en yut ves ren ght the too be d.c. ube of re- t in 750 nay res put mes sers ame d 80 le of nps. tive ce & ‘ifier well arge ‘sist- same tute now raw- r re etter eater B ob CRYSTAL CONTROL TONE for C. W. Transmission REL Cat. No. 215 Basic CW Telegraph Unit is the typical modern multi stage transmitter for the amateur who desires to use the best. Frequency flexibility throughout each amateur band with crystal controlled note at all times. Shift quickly and easily anywhere in the bands. The REL Cat. No. 215 transmitter kit is furnished with all necessary parts including metal case, drilled and engraved aluminum front panel and a very concise instruction booklet giving information on the assembly and operation. Extremely simple to operate. Consumes minimum amount of power. Employs standard broadcast receiver tubes. May be operated from B batteries, ordinary B eliminators or other similar sources delivering 300 volts D.C. A complete low power transmitter ready for immediate operation. Employs UY-227 master oscil- lator tube, UY-224 screen grid buffer tube and UX-245 power amplifier tube. Will deliver 10 watts to the antenna as a CW CAT. 215 TELEGRAPH UNIT telegraph transmitter. The Cat. No. 215 CW transmitter kit has been specially priced to meet the demands of every amateur. The price including one set of plug-in coils for any of the three popular bands is $§6.00. (When ordering wecify for which band you desire the coils.) Additional coils to cover other bands may be purchased at 17.00 per set of three. 100% MODULATION for Phone Work REL No. 225 modulator and speech amplifier unit designed to operate in conjunction with Cat. No. 215 CW telegraph transmitter functions as 100% system modulator. When used with Cat. No. 215 unit will deliver 30 watts on modulation peaks into the antenna. The REL Cat. No. 225 modulator and speech amplifier itcomprises all apparatus necessary and also includes mtal cabinet and drilled and engraved aluminum front wnl. The cabinet has the same height and depth imensions as the transmitter. The modulator may be jlaceed directly alongside of the Cat. No. 215 thereby gving a very neat appearance. The same type of power supply may be used except iat the plate voltage necessary will be 550 to 600 nits. The UX-250 tube is employed as modulator and he UY-227 tube is employed as speech amplifier. The No. 225 modulator kit sells for "4a WXV transmits every Wednesday and Friday evenings between tnd 10 p. m. Eastern Standard Time on 8, 65 OKC. The amateur who desires a modern station should install both of these units. He will then have a perfect CW transmitter and a clear 100% modulated phone set. REL will be glad to forward you literature describing these two units KADIO ENGINEERING LABORATORIES, INC. 100 WILBUR AVENUE, LONG ISLAND CITY, N. Y. ONE , - ‘ Say You Saw It in QST — It Identifies You and Helps QST oO

Page 90

tained by using different loads across the output side of a full wave rectifier, as in the latter cage the load simply has a tube in series with the active half of the transformer winding. It comes down to this: A capacity of sufficiently high value whose losses are low will actually boost the voltage, but a condenser with considerable leakage and dj- VOLTS electric losses will not be as efiect ive as one of the = {5 150 300 750 same capacity of better construction. It is just as important that a good condenser be used as it jg mo © ? ° that a choke coil of low d.c. resistance be used. Since C. has a choke coil placed between it and the rectifier and therefore has a smoother voltage - Super te across its terminals, it is not possible for it to-ac- AKRA- OHM complish the same effect upon the final voltage — that C, is capable of. In fact, it will usually have the opposite effect that C, has. A specific case is A V oltage Multiplier one in which L, Fig. 1, was 30 henries, C, was - ound iitiien eamiaieitie pfd. and C,; was removed. The voltage avail- tage Multiplier as shown in the able to a 250-watt tube from a 2000-volt, I-k.va. lly designed to insure an accu- transformer was only 1650 volts at 190 milliam- t permanency of calibration. Its 7 . . ° nded for Laboratory Standards. peres. With replaced in the cireuit and equal a a rele- to .5 ufd., the plate voltage became 2250 with a : plate current of 230 milliamperes to the tube. In Ge eee Se Se ae ea the latter case the load presented to the trans §f eS Send for your copy today. Ther former was capacitative and not inductive, and Hf {se the output into the antenna was 40°, greater. The I all TOSS | Mla. Company ~~ e In conclusion, the amount of capacity which jo" can be placed directly across the rectifier output ee is limited by the current carrying capacity of the Bf an.) i ollingdale. Pa.: rectifier tubes and transformer and by the diffi- Hf Locat a culty they add to keying, and by the fact thata § poy capacity so placed may deliver too much voltage HH provid to the oscillator. If C. is too large, keving is im- — paired and the voltage suffers. Large capac- fj onthe tances are worse trouble makers than inductances 9 It capable of storing the same amount of energy, due Neutra to the high rate of change of current possible in Jf Tests ; Teaches condensers when they first begin to charge or a the discharge. Because of these facts, the use of #j "st ve more inductance and very little additional capac waite. ( Code! tance is recommended in amateur filters, regard- Hf rye less of the number of sections. } Univer H Therm Measur Official Frequency System Continued from page 41) tained constant. During each transmission by Jf Pduci WIXV-WIAXV the integral frequency nearest 9 Meese: , its exact frequency within 1/100 of 1°% will be HH tx. Learn announced for the benefit of those able to us 9H Bridges such accuracy, but for all general amateur pur JH Rejuver Teleg; aphy with i ELEPLE X poses the frequency of transmission of both sta- Jj Coatain tions may be assumed equal to the figures & 9 92 mi t practical code instructor. esting | phonograph. Waxed tape records herein given. While no responsibility, financial Detect an aanten Hae gl = or otherwise, is assumed for the accuracy of thes’ JJ without r code traffic like an expert transmissions, every effort will be made to have ~- schools E ndorsed by U o a : . by M4 . og p ( teed to “teach you the code or it costs it exceed the figure given Provide nothit ple, clear. Ideal for advanced stu- teports on Standard Frequency Transmissions = ~ are solicited from all who take advantage of thit JJ ‘lament FREE 10 DAYS TRIAL! * to By ba sex will be absolutely satisfied with service. No matter how far from or how near tte will let you try it in your own » tre r on you may be, your report The lab FREE TRIAL! You are the sole the transmitting station y r ill with a V match that astounding offer? ACT will be of value to us. Standard blanks which W the freq. xcts about Teleplex. No obli- facilitate your filling out and our handling of the Provides C t ails m request. All such reques® Dept. N-12, 76 Cortlandt St., New York, N. Y. reports are available on reques q - and reports should be addressed to: Experime Say You Saw It in QST — It Identifies You and Helps QST

Page 91

tput Case tive own hose but | di- the St as it is d. and tage D ac- tage have se is was Vail- Va jiam- qual : ’ ss ’ itha f| “Supreme” Features e. In The Supreme oscillation test gives the \rans- mly dependable test on tubes; tubes onl i tested under actual operating condi and # tions pT. i The Diagnometer tests all tubes, in- I ch duding grid Ven | Tests | plates of 80 type rectifier itput | ey provides bias emission tests on My m tubes f the f All tubs ted independent of radio. diffi- Lecates unbalanced secondaries hat 4 | Reads b positive or negative cath- de bias Itage | Provides D. C. continuity test without s im batteries : f Furishes modulated signal for testing /pact- | synchronizing, neutralizing, ete ances ft Aligning condensers by Thermo- ances | ouple 1 r or A.C. meter f due Neutralizing with tubes used in the set. nle in Tests gain of audio amplifiers f 3 precision meters; one 4 scale D.C. ge Of Bi Voltmeter 0/750/250/100/10 volts, » of resistan 1000 ohms per volt. One 4 is sale A.C. Voltmeter 0/750/150/16/4 ypacl- its. On cale Mil-ameter 0/125/25 mills. 0/2—-1/2 amps gard- External « Universal Thermo-co ' hms Makes all n by — ~arest ill be ie ches O use Bridges pur- Rejuvena h sta- es & ancial P these Without d have #@ Provia ssions yf this ear t0 report ‘h wil of the juests The laborat With a vari he frequen Provides and functions 30,000 ohms ynnection to all apparatus. nalyzer plug ple meter for varied uses. istances in three ranges, calibration curve 10 200 ohms .1 to 25 nalysis readings ! «ket analysis without illation a city of condensers .1 r output by meter n stages of audio for tests horiated filament tubes. 0.000 ohm variable re theostat and .001 mfd, 1 mfd condensers for i variable condensers nnecting r.f. col istance measurement taneous plate current Itage readings and the idings of A.( ind D.C rrid voltage, cathode rid voltage, line voltage, ry test panel is equipped ble condenser for varying ff the oscillator. ny other tests, readings Speed... Accuracy ... Skill... in trouble shooting “AMAZING!” That’s the way radio technical men speak of the SUPREME DIAGNOME- TER. Its numerous remarkable qualities have brought the complete facilities of the laboratory to the home of the set-owner — adding speed and accuracy to the skill of the service-man. No other device ap- proaches it in flexibility, completeness and range. Set testers check only 29°9%-40% efficient in comparison with its capacity. Comes in handy carrying case pro- viding compartments for all tools and spare tubes, or at the option of the purchaser, in an even smaller case, for the service-man who does not wish to carry tools and tubes in same unit. and, now, the most practical labo- ratory test panel In keeping with SUPREME standards, unques- tionably the most advanced test panel ever produced. Of heavy reinforced bakelite, it adds to the trim workmanlike appearance of laboratory or shop. Makes the DIAGNOMETER a dual purpose instru- ment — shop or portable service — instantly dis- connectable. Most good distributors stock the Supreme. If yours cannot supply you, address, for full information, without obligation, SUPREME INSTRUMENTS CORPORATION 351 Supreme Bldg. SUPREME Greenwood, Miss. Radio Diaquometer Makes every{\ test on any Radio Set- conceivable ment Say You Saw It in QST — It Identifies You and Helps QST

Page 92

-- there's ,,, NO HUM ARCTURUS GLUE A-C LONG LIFE RADIO TUBES ARCTURUS RADIO TUBE COMPANY New ark, New Jersey _ WANTED — nitting tubes. “Types 204, 204A, Qc 860, 861 and W. E. 228 VACUUM TUBE EXCHANGE 954 SI " Ridgefield, N. J. — ——- —4 HILET POWER Pae tertns on oe ae AND CHOKES ach side, $40.00, 700 watts, 1000—- 15 $14.50. 250 wi atts, 500-750-1000 each AS $9.75. 100 watt 325 volts each side 100 watt filament any voltage $4 50. Chok 250 MA $7.50. 160 MA $6.00. 500 MA to order. Write for specifications HILET FE? co (One Day Delivery) ORANGE, N. J. MEN ARE IN DEMAND IN or RADIO utation large lormi- c I Service 20, 1930 ns Jan » Request ( ( YM MERCIAL RADIO INSTITUTE | 38 W. BIDDLE ST. BALTIMORE, MD. 78 ers’ Section, American Radio Relay League, 1711 Park St., Hartford, Conn. After your report has been checked and ae- knowledged, it will be forwarded to the Standard Frequency Station upon whose signals it com- | ments. OFFICIAL FREQUENCY STATIONS (Required accuracy 3-10 of 1%) WIAVW-WIZL, WIAWW, WIAXA, | W1BZQ, W1ICCW, WICK, W2BO, W2CDC, | W2CLA, W2DS, W2EF, W2MU, W2UV, W4BY, W4LK, W5EW, W50X, WS5SP, W4ZAV, W6AKW, W6AM, W6AYC, W6ACE, W6AVJ, W6BB, W6BGM-W6CVO, W6BMW, W6BRO, W5BZU, W6CAE, W6CDY-W6CPX, W6CMP, W6EC-W6XE, W6QL, W6QX, WOWN, W6ZV, WIBD, W7AAT, W7GQ, WSAQ, WSAPZ, WSBAV, WSBZT, WSEQ, WS8GZ-W8ZG, W9AHQ, W9ACG, W9BGH, WSBGK, W9BVC, W9CPM, W9EFO, W9EGU, W9IG, G2PD, G2NM, GSBY, | G5YK, GI5NJ, VE2BE, VE3CO, VES3FC, VE4BT, VIK5BG, VIKS5LF, VK7CW and ZL2AC. | STANDARD FREQUENCY TRANSMISSIONS OF WWY Schedules of standard frequency transmissions from WWYV, The Bureau of Standards, Wash- ington, D. C., will be found on page 19 of the | August issue of (ST. —J.J. L. The A.C. High- eee Receiver (Continued from page 14) grade to keep noise down to a minimum level, as otherwise the noise resulting from an inferior shunt resistor will outweigh the advantages gained. There is little that could happen to a correctly built receiver of the type shown to prevent its successful operation. The amateur is usually able | to remedy difficulties encountered in d.c. op erated receivers, so the only stumbling blocks he is likely to encounter are those due to the feature of a.c. operation. If it is found that the receiver has a decided hum when it is operated entirely from the 110- volt 60-cycle line, it is quite likely that the “B” battery substitute is the cause of the major portion of this hum. The use of an adequate filter | on “B” substitutes cannot be too urgently recommended. Doubt regarding the effectiveness of the substitute can be dispelled, however, by operating with “B” batteries. The total plate current of the receiver is only 4 milliamperes, and this is a sufficiently small drain to make the use of even the Leper st size “B” battery economical. With a ““B” battery plate supply the only possi- | ble source of hum is that due to the heater cit- cuits, and hum from this source will not ordi- narily be found objectionable. If hum is serious with the battery plate supply, it is quite possible that the heater circuit has not been grounded, that the heater voltage is not high enough, or that a0 | unusually bad tube has been encountered. Say You Saw It in QST — It Identifies You and Helps QST A shot design “Ham — detec type, cx covers I] the dial. List pric Sdecsal ( Thi Ti

Page 93

rd n- ons sh- the er i, as rior ages ctly L its able op- s he ture ided 110- the 1a jor filter ently Ness -, by plate and ise of nical. yOssi- r cit- ordi- rious ssible , that at aD

THORDARSON TRANSFORMER 150 watts, 400 volts each side of centre tap at 375 M. A. 5 , Volt filament, centre |, } tap. Fine for power » supply for 7'> wat- ~ ter or for crystal control power sup- ply. Specially priced for a short time only. Each $3.95

New York’s

Make your own transmitting and ceiving coils. ting inductance. Size of tubing Prices per turn Inside Dia. 3/16” 1/4” 5/16” 21/8” 9% 10c 12c* 23/8’ 9c 10c 15c* 31,8” 10c 12¢c 17c* re- Copper tubing transmit-

Ham Green, double silk covered, No. 16 receiving inductance. 2” diameter 30c per inch 3” diameter $5c per inch The Home of RADIO 45 VESEY STREET NEW YORK Headquarters for Transmitting Apparatus

THORDARSON B-Eliminator TRANSFORMER using the Raytheon B-H tube. Will carry the maximum current consumption without overheating. 285 volts) on each side of centre. |: Lower voltage may \_ be obtained if desired. Listed < $1.65

NOW only . When in Town Visit Our Store

ACME ELE(¢

GENERAL CARDWELL IN STOCK EVERYTHING IN JEWELL BRADLEY rHORDARSON rRAD LYNC FLECHTHEI NATIONAL KLERON GLOW LAMPS PYREX (@, NEO

Made by General Electric NATIONAL Co. type G. 10, standard : base 101 uses, as illustrated in SIGNAL OST May, 1928, issue page 17, M Price GORY. 2 ccccccscses 65c RECTOBULB RADIO Shield every description to order. Aluminum and panels of cans

SHORT WAVE NEW 1930

SHORT WAVE

RECEIVER

mechanical as the design and “Hams” finest everywhere

audio, using three — detector 2 t yus range 15 to 100 type, continuc the dial. List price $60. Special Offer, net . material for the ‘‘Ham" Bros (en greatest 201- shor 4 4

meters; covers Ham bands 20-40-80 meters with generous s This department under the supervision of the Short 2xdcasting statk \ tubes The LEEDS 1930 SPECIAL A short wave receiver that's got them all beat. construction. Best circuit Praised by t wave receiver ever made. What some prominent users ay ‘More than delighted ape its per- ormance.’’ 4P D. “Far ex- ceded expecta- tions 2AFS. Oscillation ind tuning con- trol far best I nav ¢ ver seen.”” “Signal strength amaz- ngly loud and response very clear In use by a con- tant host of Ilams from coast to coast. 3-tube Receiver Universal imateur type pre id on $37.50*

Wave Specialist Jerome Gross. We mor laboratory

hands of High-C Employ with cx Write X-MITTER The LEEDS High-C 75 Watter

A real X-mitter for those who are satisfied only with the best. Incorporates all the latest de velopme nts of the past year, insur- ing highest efficiency. and operation very simple. Size 10” x 14” x 17” overall; adjustments Finest re suite are possible even in the yeeede “N EL PT) | | an . , a_ comparatively Hartley circuit employed, s one UXN852 tube inexperienced operator. insuring constant frequency stability. as an oscillator; wired almost entirely »pper tubing, still further adding to its electrical efficiency. LEEDS RADIO LABORATORIES Precision Custom Built Short Wave Receivers and Transmitters design, construct and advise on any Jerry Gross for advice on 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% Must Accompany All Orders

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

Page 94

Moanaters York. SY + equipped ally export civing itting radio

Massachusetts Radio and lelegraph School 8 Boylston Street, Boston Send for Catalogue Tel. H k 8184 Established 1905

TRANSFORMERS — Mounted — Complete wes 60 .. $17.00 70) side conse BOO 1}— 750— 1000 each side $9.75; mounted $11.50 hokes, Polyphase and 25-cycle Add $2.00 for fil. winding ICES FRANK GRE 1927 S treet, Pilsen Sta. Chicago, Il.

Oscillating Quartz Crystals Cate” llators, carefully selected for groun 1 to your approximate ed accurately to within one- nd $12.50 t 17.50 nks . 5.00 VERTYPE" crystals to broadcast y for literature in Piezo Supply Company luilding Kansas City, Kansas ists in frequency precision 1101 I

Say You Saw It in QST

The filament transformer might be the cause of some hum if it is unshielded or poorly constructed. A transformer with loose laminations is almost certain to give trouble due to mechanical vibra- tion of the core. An unshielded transformer is not so desirable as a transformer which is shielded with an iron case, for it is often desirable to ground the iron case. To further reduce any trace of residual hum which might be present, the filament transformer should be several feet from the receiver; it should not be mounted on the operating table. The same precautions are of course applicable to the ‘‘B”’ battery substitute, if one is used. The experimenter should realize that this receiver is but a forerunner of the more im- proved models which amateur ingenuity will bring into being. Countless improvements and modifications in design can and will be made by those who put themselves to it. Improvement in regeneration control, modifications in tuning arrangements, increased audio frequency selec- tivity and desirable features as yet unforseen “an be forthcoming. Many hands and minds applied to the problem will do the trick and the results will be chronicled in QST7 as the contribu- tions are sent in. The a.c. receiver has come to amateur radio to stay. G5BY Wins 1929 Station Description Contest Cup (Continued from page 17 Read over the suggestions given in the March, 1929, issue of (ST and the winning station de- scriptions. Compare your own station with those which were judged the best. Take advan- tage of the good features they contain in im- proving your equipment. Add to these the more recent developments together with those your own ingenuity can devise. The resulting station description, incorporating the necessary photo- graphic illustrations, will surely mean a better “Amateur Radio Stations” section for the 1930 issues of OST. — J.J L. Trophies and Certificates for the January and February Contests (Continued from page 16 in many respects to our previous international tests in which many readers have taken part. We believe that a thorough study of the announce- ment in last QST and the rules of either or both contests will enable anyone to take part intelli- gently in January and February. If there is the slightest doubt in anyone’s mind on any points in connection with these activities, we shall be pleased to straighten the matter out if that ama- teur will write us. A few questions have come up on the subject of the January All-Section Sweep- It Identifies You and Helps QST

Page 95

of “dl. st ra- 10t led to ace the om the of ite, his im- will and by t in ing lec- een nds the ibu- 0 to ion rch, di - with van- im- more your ition hoto- etter 1930 L. 1¢€ ional t. We unce- - both ntelli- is the nts in ill be ama- me up weep- MMM gy OOO av rN f its vadio news.. its in RADIO NEWS —so eee = tien | 1 The NEW RADIO NEWS ! Dept. 3801, 1 381 Fourth Avenue 7 New York, N. Y. | Gentlemen: Please send me the next 9 Issues of the NEW ! RADIO NEWS at your spe- | cial introductory offer of 1 only $1, which I enclose. ! (Regular newsstand | price is $2.25 for 9 issues, or $2.50 a year by subscrip- tion.) I understand that you will cheerfully return | my dollar if | am not perfectly satisfied after reading | the first issue. | I Vame | , | Street Address i City State CCASIONALLY a man gets so close to 0 radio that he doesn’t see the broader aspects of the industry. Certainly it is all right.to know about the newest receivers, and how to build them. Certainly the newest discoveries in servicing and han- dling radio parts and sets should be told clearly and at length in the magazine he reads. The NEW RADIO NEWS brings you all this every month. But it brings you much more than this. It provides you with the vital radio news of the whole world in a terse, business-like way that demands reading by every man whose inter- est lies in radio. Beyond the fact that the NEW RADIO NEWS is actually new from cover to cover, you begin to realize that RADIO NEWS has grown up. It sees with modern vision the trends and developments in the radio industry. If a new discovery in television occurs in Greece or even Patagonia, you'll find all you want to know about it in the NEW RADIO NEWS. If the Federal Radio Commission makes some new ruling, you can count on RADIO NEWS for the complete story of it. If an Austrian inventor designs a new improved radio tube, you'll be sure to find it all explained in RADIO NEWS. That is why we say with emphasis — if it’s radio news, it is in RADIO NEWS. And if you are the sort of man whose mind seeks an executive’s viewpoint of radio’s rapid prog- ress, you'll want the NEW RADIO NEWS delivered to you every month. A Special Offer to Radio Men To introduce the NEW RADIO NEWS to those in the industry, we offer to send you the next 9 Big Numbers for a single $1! On the newsstands you would have to pay $2.25 for these same 9 issues, or $2.50 a year by subscription. We make this exceedingly low offer, because we know that once you see the NEW RADIO NEWS, you will continue to read it in the years to come. Simply fill out and mail the coupon at the left. It brings you the Big New RADIO NEWS at a jobber’s discount. Say You Saw It in QST — It Identifies You and Helps QST 81

Page 96

BUILT BETTER CONDENSERS AND RESISTORS Takes Out the Hum In Any Dynamic N spite of the many methods utilized to eliminate the hum in A. C. dynamic speakers, many of the best dynamics still have a hum which is sufficiently pronounced to be objectionable. You be surprised at the completeness with which an Aerovox 1500 mfd. “A” con- denser, comnected across the field coil or across the rectifier output will eliminate the hum and increase the sensitivity of the speaker, Complete details and comparative data showing the results of using an “A” con- denser eliminate hum will be furnished on requ A complete catalog of all Aerovox con- densers and resistors will be sent free on request, AEROVOX WIRELESS CORP 782 Washington St., Bklyn., N. Y ‘PRODUCTS THAT ENDURE [HALLMARK OF EXCELLENCE : ¥ for ILTER CONDENSERS, BY-PASS 1 DENSERS, RADIO INTER- RENCE FILTERS AND POWER / C TOR CORRECTION BANKS \ sa r mplete catalog of Cornell Products, uding our new “Cub” Condenser. CORNELL ELECTRIC MFG. CO. na Island City New York QUARTZ OSCILLATING CRYSTALS Scientifica r Maximum Power and Unconditionally Guaranteed 1 in 7 your approximate specified frequency, supplied at the f CS + kw 0406060400608 0000ennbeReERS $12.50 Se re aera 10.00 CO, ...1t0i56te¢nehetakerewecenewkh 15.00 1 in. Test lanks, 200-400, 400-600 meters. .... 5.00 Dustproof Bakelite mounts ’ coe aaa . ections, above prices are doubled. Sections of a able dimensions made to order. Prompt Delivery J. T. Roon 1. Se., 4 Calumet Bidg., Buffalo, New York s’ crystallographic experience BECOME A RADIO OPERATOR See the World, Earn a Good Income, Duties Light and Fascinating LEARN THE SECOND PORT U.S.A. R ted here. New Orleans supplies oper Gulf ports. Most logical location in t to tor training Oo lify for the various branches of radio A ry graduate placed. Runs to all parts spe nd Night classes. Enrollany time. oO Radio School South, rature on request. GULF RADIO SCHOOL 844 Howard Ave. New Orleans, La. Say You Saw It in QST — It Identifies You and Helps VST stakes Contest. To insure a general understanding of the points involved, some questions and answers follow: Suppose WSDSP QSO’s with W8ARX and takes from WSARX a message originated at W2MA and addressed to an individual in Chicago. “Can this count as a contest message?” asks WSDSP. Yes, providing the message is handled during the period of the January contest, provided that W8DSP turns in a copy of the message to the contest committee with information on station, date, time, ete., according to Rule 3 and provided that WSDSP also gives WSARKX a bona fide message sometime during the two weeks of the competition similarly making a record of this occurrence for the contest judges. This may be either a special message which he originates for WSARX (orto befurther relayed by WSARX) or a message WSDSP has received in the course of regular relaying for W8ARX or some point beyond. VE3ZZ asks what type of message texts should be ex- changed in verification of a QSO, if the following examples would do, or if these would be considered “ rubber stamp” texts: Do you think we could keep a regular schedule question, How many points has your station acquired in these national tests query. The texts are O.K. as they differ materially from each other. Many other questions or facts pertinent to the ap- paratus in stations, localities, opinions regarding conditions, DX, traffic or radiophone operation, comments on the characteristics of different amateur frequencies, off-fre- quency operation, regulations, the interference question, high quality signals, beginners, broadcast or ship operating, organization work, Army or Navy Net operation, station descriptions, QST articles, message procedure, laws, ete., would make excellent texts for messages to be originated in the contest, not to mention the variety of non-radio subjects that could be called upon when operators in remote districts may find themselves short of regular traffic. Is it necessary when sending a message which you origi- nate for delivery at astation which you contact, to put in the name, street address, etc., or will the call signal, city and state suffice? As a general rule, the more complete the address the better. Far too many messages on A.R.R.L. message blanks are returned here by the post office department daily be cause they lacked a sufficient address to insure delivery. In the course of a year we wear out several call books trying to complete the addresses on such communications. Every message to be relayed through even one station should have the name as well as street and number and all other possible information. However, in the case of messages going direct from originator to addressee the call signal, city and state will be deemed adequate. Participants may guide themselves accordingly. Is the following form and order the correct A.R.R.L. form to be used in contest messages, or if not, what is the right form? See the example of proper message form and order in the Fourteenth edition of the Rules and Regulations of the Communications Department (November 1929) sent free on request. If you haven't this useful pamphlet drop us a postal today. Only messages complete and correct in every respect will count in our January competition. The proper order follows: City and state of origin, station of origin, number, date, check (unless omitted), complete address, text and signature. How should messages complete in other respects but bearing no signature be sent? With the words “no sig" after a double dash at the end of the text. . > . Experimenters’ Section (Continued from page 48) emission current is greater than the plate current with normal grid bias and as a result, a less sensi- tive relay is required than would be the case if the grid were brought back to the cathode.

Page 97

to est on, ng, ion te., lin cts icts igi the and the nks In z to ery ave ible rect ate ..L. the the the 2 on sa ery yper xin, text but e nd ent 1si- p if Keys, transmitting, Airplane tacts, double skirt knob Western Electric Dynamotor C.W. 927. Two 32/250 volt dynamotors in shock-proof hanger. Used in parallel give 160 mils. at 350 volts, in series, give 80 mils. at 700 volts. Can be used to operate transmitters to 50 watts from 32 volt D.C. 1.5 amp. input. Two dyna motors in hanger Single dynamotor without hanger West. Elec. Switchbd. C.W. 928. Control for Dynamotor C.W. 927. Has starting switches, fuses, 0-50—-500 voltmeter, switches for testing main lines and output Also complete filter system. Special Dynamotor, West. Elec. 12/350 volts, C.W. 1056 on heavy Bakelite base, with filter. 80 mil. output Dynamotor, G.E. Navy. Airplane, 24/1500 volts, 350 watt. Specially priced Dynamotor armatures, General Electric triple commu tators, two sizes. D.C. 24/750 volt and 24/1500 volt, complete with ball bearings (build field and save $30) $10.00 and Ammeter, Westinghouse, type C.A., either 0-1, 2 or 3 amps., zero adjustment, flush mounting State size Ampere hour meter, Sangamo, battery charge and dis charge, type MS, 2 sizes, 0-300 and 0-500. List $50.00 Milliammeter, Westinghouse type C.A. 0-500, zero adjustment, flush mounting Voltmeter, Westinghous« type C.A ment, flush mounting Voltmeter, Westinghouse, A.C. 8” resistance 0-175 volt Voltmeter, Westinghouse model Pl 3 scale, 0-5, O-7.5, 0-150 for measuring A, B and C voltages, portabk Bakelite case. Special Motor generator, Crocker Wheeler, 110 D.C. 220 A.t 500 watt, 500 cycle. Ball bearing Complete line 500 cycle motor generators Prices on request flameproof, silver 4" con 0-25, zero adjust diameter with external . 60 cycle power house type ; toS K.W Transformers, Peerless, 120 input, 5-10-15 volt output, iy K.W., 60 cyclk Iransformers General Electric, 125 to 2500, with center ycle, 200 watt Simon, 220 to 11500 closed core, 4 K.W pancake’ secondary Kellogg, Model 1 , 600 R.PLM tap, OU « Transformers, 500 cycle, Air compressors, weight 6 Ibs : be « ft. per min 125-lb. pressure. Require My ha Condensers, West. Elec. 21AA, 1000 volt A.C. test, 1 mfd Condensers, Dubilier, mica, working volts 12,000, capac ity .0004 Condenser Dubilier, mica,'40,000)volt, .0012—-.001—.0008 or .0O3 mtd Condensers, Dubilier, mica, working volts 3,600, capac ity .3 Condensers, Wireles 10,000 working voltage Dubilier, mica, Specialty, copper glass leyden jar, 002 mid Condensers, transmitting, 8500 working voltage .004 mfd Condensers, Dubilier, mica, transmitting, 12,500 working voltage .004 mfd. Prices on request. Transmitter, telephone, Holtzer Cabot, carbon granular Western Electric Radiophone transmitter unit 326 W. Regular price $12.00. Special Headphone, double Holtzer Cabot, U. S. Navy Headphone, Army, with strap, 120 ohm Headphone, Radio School, leather headband, 75 ohm Keys, transmitting, Army practice, silver contacts Keys, transmitting, Airplane flameproof, silver 3° con tacts, with blinker light mounted on Bakelite base List $7.50. Special Largest Radio and Electric Supply House in U. Write us your particular requirements. a Ss BARGAIN 50 00 OU OU OU 00 oOo Oo 00 OU 00 Telegraph and busser portable sets, Keys Relays Filters ARMY AND NAVY RADIO SURPLUS case, 2 tone mahogan specializing on Army and Navy Surplus. Sufficient postage and deposit of 20% required on C.O.D. orders. NO C.0.D. ON CANADIAN ORDERS. 4 contact platinum contact high frequency buzzer, 2 telephone loggte wicne potentiometer sending key, 3 mfl. condenser transformer and 2 choke coils, receiver, $30. valuc 5.00 transmitting, Navy % K.W., “Mesco” silver contacts 2.00 Buzzers, Century & Mesco high freq., 2 coils 1.50 Buzzers, Western Electric, Extra quality, high frequency 1.50 Receivers, Signal Corps type, B. 14A, 200-600 meters, with cry. det. and Century buzzer in portable case 7.50 Receivers, Navy, C.N. 113, 300-2500 meters, crystals 7.50 Receivers, Navy, C.N. 240, 1000—-10,000 meters, original cost $500 50.00 Receivers, S.E. 143 and I.P. 500. Prices on request. Insulators, Electrose, Navy receiving strain, 7’°— per doz. 1.25 Heterodyne, Signal Corps, type B.C. 104. 1000 to 3000 meters, with detector 15.00 oils, Choke, Western Electric Co. 57C, 83 ohm, 2 windings. Fine for filter 1.00 oudspeaker Unit, Western Electric, 193 W. Ideal for monitoring your transmitter. Without cord 3.00 Magnetos, Army mine and ringer type, has 4 large fixed magnets. Good valuc 1.00 Battery, U. S. Army, lead-acid type, 10 volt, 20 ampere hour. Consisting of 5 individual 2 volt cells in carry ing Cast 5.00 Individual 2 volt cells, minus electrolyte 1.00 Generator, airplane, Signal Corps, with shaft, can be used as motor or bat. charger, 12 volts, 33.6 amp. 10.00 Sounders Signal Corps 120 ohms, with adjustable magnet 2.50 Generators, Westinghouse 110 volt, A.C. 900 cycles, 200 watts, self excited 15.00 reneral Radio Variable Inductor, type 190, 150 M.H. or 650 M.H 6.50 Western Flectric 122 AB, double pole, double throw, 350 ohms, operates on 20 mils. 6 volts, handle > amps. per contact. Reg. price $17.00 2.50 Storage batteries, Edison Nickel Alkali 225 amp. hr. type A-—6 1.2 volts per cell, weight each 20 Ibs 4.00 Voltmeters, D.C. portable new Weston model 45, 3 scale 0—3-—15-—150 guaranteed ‘4 of 1% accurat« 40.00 Ammeters, D.C. portable, new Weston model 45, 3 scale ( 5—15-150 with 3 scale external shunt and leads 4, of 1% accurat 40.00 Generators, 12 volt, 60 amp. has automatic controls 20.00 heavy duty, West. Elec. 936 in steel cabinet, made for gasoline engines, fine for motors, high fre quency apparatus, etc. Has large inductance, high imp. chokes, low imp. hi cap. condensers 7.50 Motor generator, R & M, 110 D.C. 34% h.p. to kw. 20 volt 80 amp. Great for large station filament supply. Price on request. SPECIAI U. S. Army instruction books on elemen- tary and advanced telephony and telegraphy. Hun- dreds of pictures and diagrams MANHATTAN ELECTRIC BARGAIN HOUSE, Dept. Q, 105-7 Fulton St., New York City Say You Saw It in QST It Identifies You and Helps QST 83

Page 98

| AUDIO FREQUENCY SELECTIVITY The number of amateurs on the air together FROST” DIO | with the narrow widths of the frequency bands | assigned to amateur services results in our present bands being highly congested. There are several methods of obtaining the proper selectivity to separate the desired transmitting station from the myriads of undesired signals. The coils and tuning condensers may be constructed so the amateur band is effectively spread over 90 divisions or more of the tuning dial. Tuned radio frequency wid’s largest man 1cturers of high gerade variable resistors. we are sin- ular well equipped to piy your re- quirements, no mat- No. 890. Double amplificat ion may be used as an aid to selectivity, tery ttheymaybe, @erth metal shell unit | but this is not desirable since it complicates the W, aE fe detail tometer type: Rotors operation of a receiver and may be more trouble . nection. Composition | than good. A good method of obtaining selectivity regarding your varia- clemcats, 5.000 ohms for telegraph communication is to employ an bie resistor problems, unit Diaqneter, 17/8 audio amplifier which has its response curve and e us submit Me | peaked at approximately 1 kilocycle. Regardless samy] to meet your specifications. of the manner in which such an amplifier distorts the received signal this appears to be the only practical solution to successful amateur telegraph HERBERT H. FROST, Inc. ; — : communication free from QRM. The use o Main ¢ and Factory: ELKHART, IND. es f a & @ of al QST References a A Tuned Audio Transformer, Braden, page 43, March, 1925. The McCaa Anti-Static Devices, Kruse, page 29, COIL > April, 1926. High Ratio and High Amplification, Kruse, page 27, September, 1925 A Simple Audio Oscillator, Halstead, page 25, September, 1925. Measurements of the Voltage Ratio of Audio and

ratios leadi:

ond « eT ag el oy Transformers, Ramsey, page 24, August, tion and prices 1925 PACENT ELECTRIC CoO., Inc. Peaked Audio Amplifiers, Kruse, page 29, April, 91-7th Avenue New York City 1926.

Short Wave Receiving Sets, Hatry, page 21, July, re — . 1926. : m. D A Device for Limiting Signal and Static Intensity, P ** ° > el + *- White, page 36, June, 1927. fi rRI-STATE HEADQUARTERS 7 —_ iy veer Omg hort Waves . PENNSYLVANIA — OHIO— WEST VA. nm pd any 2 my on : — te . — 1e Helpful Audio Filter, page o/, Jan. 1925. . VHOLESALE RADIO Practical Audio Filters, Hatry, page 19, May, bs SET BUILDERS we offer the 1928 ficient service. We handle only — . _ : . e and give MAXIMUM DIS- Acoustic Wave Filters and Audio Frequency — Selectivity, Bourne, page 23, August, 1928. GET OUR A D * . _ . A Proc. IRE. me The Determination of the Audibility Current of a U. Telephone Receiver with the Aid of a Wheat- St 430 waa AD stone Bridge, Washburn, page 99, April, 1928. Ri at Diamond St. | Distortion Free Telephone Receiver, Bethenod, PITTSBVROGOH PA. | page 163, April, 1923. — Say You Saw It in QS7 — It Identifies You and Helps QST

Page 99

to the ing eur or Ley itv, the ble ‘ity an rve less rts nly uph ot arp ese erl- fre- oW- ay, ney of a »at- y28. t vd,

OST Oscillating Crystals

AMATEUR BANDS: temperature. All crystals absolutely guaranteed (New prices effective October Ist 1929) regards t output and frequency and delivery can int is coming and no doubt you are going be made within two days after receipt of your order. ov" trans er removing those weak link CONSTANT TEMPERATURE HEATER UNITS: SO as to get the most possible efficiency trom your a Wi supply heater units guaranteed to keep O aati ; . ’ , = the tel rature of the crystals constant to better nem © aay ey gy aD SRE OOPMENEY than a tenth of 1 degree centigrade for $250.00. psebilé your set. Does it a on one frequency [Two matched crystals, ground to your assigned mot. our power crystals will solve that problem freque 1 the 550-1500 Ke band with the heater SCIENTIFIC RADIO SERVICE Crystals are Buowe ¢ t « $360.00. More detailed description be t yest obtainable, having ONE single frequen of this nt upon request and highest output. With each crystal is furnished ; P ‘ an accurate calibration guaranteed to beller tha» ATTENTION AIRCRAFT AND COMMERCIAL a tent f 1°... New prices for grinding power RADIO CORPORATIONS: crystals in the amateur bands are as tollows : We invite your inquiries regards your crystal 1715 to 2000 Ke band Tre $18.00 (unmou d) eds for Radio use. We will be glad to quote 3500 to 4000 Ke band....... $25.00 (unmounted) special pricestor POWER crystals in quantity lots. 7000 to 7300 Ke band. ......$45.00 (unmounted We have been grinding power crystals for over — ive years, being pioneers in this specialized field, BROADCAST BAND: we feel we can be of real service to you. We can / er crystals ground in the 550-1500 Ke band grind po tals to your specified frequency accurate to plus or minus 500 cycles of your spec cel or minus .03°,. All crystals guaran- tied freq ully mounted for $55.00. In ordering teed deliveries can be mad 1 trial please s \ tube, plate voltage and operating wil

SCIENTIFIC RADIO SERVICE “THE CRYSTAL SPECIALISTS” P. O. Box 86 Dept. P3 Mount Rainier, Maryland

At Last! —« book containing all the rules of com- mercial and government radio traffic—and operating regulations. Radio Traffic Manual and Operating Regulations By R. L. DUNCAN and C, E. DREW R. ©. A. Institutes, Inc.

THE ONLY BOOK OF ITS KIND! @ At last here is a book for students, amateurs, or radio operators who contemplate entering the commercial field. With the help of this litthe book — the only complete one of its kind — you may learn quickly and easily all the government and ¢ sreial traflic rule s and operating regulations. @ Duncan and Drew, the two well- known authors of **Radio aphy . set forth clearly ate ely in 181 pages all the information on the subject that you will want. ’ from Morse Code an on Issuance of Radio Operators’ Licenses is included in detail. An excellent index in the back of the book ——

every topic easy to locate. 2. ON APPROVAL COUPON CHAPTER HEADINGS | John Wiley and Sons, Inc. Acquiring the Code , 440 ng et: or York - ; Operating Rules and Regulations of the Radio Marine Corporation | . ve ~ es aay H heer wy Sent ae Be ——— International Radio Telegraph Convention ; Or. s | agree to remit $2.00 or return the book U. S. Radio Act of 1927 | < to SS eee ree ome Ship Act of July 23rd, 1912 | nies Regulations Governing the Issuance of Radio Operators’ Licenses i i Reference . ‘ OST-1-30

Say You Saw It in GST — It Identities You and Helps QST S45

Page 100

PRODUCT RECOMMENDED FOR AMPLIFIER \ND SERVICE ENGINEERS implifier Parts r use with 245 Tubes No r Amplifier Transformer 2.00 Fit ) Push Pull Output Trans- 2.00 No Pull Input Transformer $4.50 ‘ N ht Output Transformer , $ 5s » Transformer........ $4.50 D Condenser Unit... . $22.50 N Choke (use in Filter Cir- aan $11.00 N ransformer (Radio and Phono- tion ' ee S noney order for prompt delivery Dongan Electric Manufacturing Co. 2999-3001 Franklin St., Detroit, Mich. , f MERIT for FIFTEEN YEARS” == EASTERN AMATEUR™ HEADQUARTERS NEW NATIONAL Short-Wave Thrill Box in Stock High Voltage Condensers Jewell TRIO in Stock Lewest Prices on Aero and Thordarson Parts send for our Special Amateur Catalog SPORTING GOODS CO. M. & H » Market St., Phila., Pa. — RADIO TONIC! » matter what skill; no matter%what hat trouble—there is just one way | CLAROSTAT WRITE coin » Clarostat line or ask your dealer Better still, send 25c in stamps or » Better Radio.” CLAROSTAT MFG. CO., INC. Specialists in Radio Aids 283 N. 61! reet Brooklyn, New York Say You Saw It in QST — It Identifies You and Helps QST Radio Transmission Measurements, by Bown; Englund, and Friis, page 115, April, 1923. The Testing of Audio Frequency Transformer Coupled Amplifiers, Diamond and Webb, page 767, September, 1927. Notes on the Testing of Audio Frequency Ampli- fiers, Dickey, page 687, August, 1928. Books Principles of Radio Communication, Morecroft. (Second Edition, page 971-981, also pages 905- 921.) Peaked Audio Amplifier, page 66, fifth edition, Radio Amateur’s Handbook. The I.R.E. references deal principally with meth- ods of audio frequency measurements. Book Reviews By James J. Lamb, Tech. Ed. Elements of Radio Communication, by John H. Morecroft. Published by John Wiley & Sons, Inc., New York (Chapman «& Hall, Ltd., London). 269 pages and 170 figures, including cireuit dia- grams and photographic illustrations. Price,$3.00. This book is not an abridgement of the same author's comprehensive Principles of Radio Communication, but is intended as an introduction to the latter. While it is an admirable “ first-year’’ textbook for the student of radio engineering, it is just as well suited to the requirements of the out-of-school student. The theory is aptly tied to the practical. Mathematical knowledge beyond simple algebra is unnecessary for its complete understanding and the simple, concise style of the author permits a pleasingly graphic mental picture of the material presented. To the transmitting amateur, the chapters, The Vacuum Tube and Its Uses, Radio Telegraphy, Radio Telephony, and Receiv- ing Sets have the greatest appeal. The volume concludes with 117 practical problems whose solution will assist the student in crystallizing the knowledge gained from his read- ing, and these are followed by a well-chosen alphabetical index. Morecroft’s Elements should be on the book-shelf of every student of the art. Radio Telegraphy and Telephony, by Rudolph L. Duncan and Charles E. Drew. Published by John Wiley & Sons, Inc., New York (Chapman & Hall, Ltd., London). 950 pages, 468 illustrations. Price, $7.50. This is perhaps the most ambitious practical textbook on radio to come to our attention. The fundamental theory is explained in a fashion obviously intended for the tyro, although in the effort to attain simplicity slight inexacti- tudes are occasionally introduced. The material on commer- cial telegraph and broadcasting equipment is useful to operators handling RCA transmitters as well as to those preparing for commercial operators’ license examinations. The chapter on short-wave transmitters and receivers con- tains examples of amateur equipment. Unfortunately, a decidedly 1928-type transmitter is erroneously captioned “1929 QST type.’’ An appendix of handy tables and the schematic circuit of a complete ship-board installation with instructions for operating the transmitter is followed by a voluminous alphabetically arranged index. How To Pass U.S. Government Radio License Examinations, by Rudolph L. Duncan and Charles E. Drew. Published by John Wiley & Sons, New York (Chapman & Hall, Ltd., Lon- don). 169 pages, 92 illustrations. Price, $2.00. 1

Page 101

ner ge rli- ft. 5- mn, th-

— NI A T ] © NI A LL We announce two new series of 5000 Volt New Series TMU and 7500 Volt Trans- Transmitting Condensers mitting Condensers, the NATIONAL Model TMU. These embody all the very latest features for efficiency, steadi- ness of signal and rig- idity of construction. Capacities: 5000 V. Series, up to .0005 Mfd; 7500 V. Series, up to 00025 Mfd. All plates have

National Co. still makes a full line of special, trans- mitting condeasers to order rounded edges. National Transmitting Con- } densers are widely used by : NATIONAL COMPANY INC. the U. S. Government, broadcasting stations ENGINEERS AND MANUFACTURERS and members of the ARRL, everywhere Made by the makers of the famous NA- 61 SHERMAN wae MALDEN, MASS. TIONAL Velvet Vernier Dials. . yr pi sesomal ony Est. 1914 W. A. Ready, Pres. Write for full information, mentioning QST

Just Published! LE

A Sure Way of Passing Your Government Examinations! Here Are All the Questions—Completely Answered IN How to Pass U. S. Government Radio License Examinations By R. L. Duncan and C. E. Drew R. C. A. Institutes, Inc.

Don’t take any chances with your examinations. Caretul question and answer method used in the text, will teach study of this book will insure success in obtaining your you how best to express yourself and put that knowledge Government Radio License, because it contains full par nto words ticulars, questions and answers, on the latest radio exam- 259 questions with complete answers show you just what inations by the government will be expected of you. Order a copy now and start It will not only give you all the data, but through the studying! $2.00 CONTENTS ON APPROVAL COUPON Foreword John Wiley and Sons, Inc. 440 Fourth Avenue, New York Gentlemen: Kindly send me on approval Duncan and Drew's “‘How to Pass.” At the expiration of ten days, I agree to remit $2.00 or return the book, postpaid Regulations Governing the Issuance of Radio Operators | | Licenses | Commercial and Broadcast Transmitters | Radio Receiving Apparatus Motors and Generators | | i I I Name. . , heneeeesene ; Storage Batteries and Auxiliary Apparatus Radio Laws and Regulations Address Appendix Reference OST-1-30

=

Say You Saw It in GST — It Identities You and Helps QST Si

Page 102

DOUBLE YOUR SPEED

Make MORE MONEY Throu e CANDLER SYSTEM irees in Speed- hand Speed Tele- grap lelearaph Tous itires Watter H. Candler Snecdh — Former World's Cham ; ystem Operator and Au- l. In hor of The Candier 50% in System Courses instead nd for Speedhand-code operators. High ledraphing the only recognized *‘short r in telegraphing. Gives you alert, well-trained and perfectly Co- pag faculties necessary to highest degree of Skill. De- lot xl world’s fastest opera- ‘ - tors. Doubles speed of beginners . tors Faster. Strengthens Weak + \RMS relegraph Touch-Typewrit- ing the only typing course teaching the correct use of the il in telegraphy. Doubles typing speed in few days. Makes receiving easy Write for full particulars of il «* the Courses. Learn what they ! what they are doing for 2 radio operators, and what they S * will do for You, Write now! A 4" ud will do. Say if inter ‘ in combined or separate > rst rHE CANDLER SYSTEMCO. 6343 S. Kedzie Ave., Dept. RL Chicago, iil. ————

for AMATEUR Specialists RADIO EQUIPMENT Shor eters — $12.50 I r for laboratory testing . 17.50 St t to order. Either to our design hcations. WIRELESS EGERT ENGINEERING, Inc. 179 Greenwich Street New York

New Book on POW ER AMPLIFIERS sted in Power Amplifiers sed and up-to-date treatise . how to secure true em . a range trom 25 to 8000 match impedances mendous power. 10 different plifiers with diagrams and t postpaid for 15c, coin. RRANTI, INC. 130 W Desk 81 New York, N. Y.

Say You Saw It in QST -

It Identifies You and Helps QST This catechism of radio questions and answers, reminjs- cent of Bucher’s book of the same title of which this is aps parently a revision, will be welcomed by those preparing for any grade and class of U. S. Government radio operator's license. The chapter arrangement follows that of the sections of the commercial theoretical examination, each being made up of typical examination questions and concise answers, The book should be studied in conjunction with a good text and is not, in itself, intended as a complete preparatory text, The questions and answers are prefaced by a chapter on the requirements for and authority of the various licenses, and are followed by a handy appendix of formulas, symbols, international abbreviations and code chart. English and Science, by Philip B. McDonald. Published by D. Van Nostrand Company, Inc., New York. 186 pages. Price, $2.00. It is difficult to conceive that two such prosaic subjects as English and Science could be interestingly and enter- tainingly treated in a practical text intended to assist the technical writer in doing accurately and concisely until such time as an opportunity of browsing through this book is offered the fortunate reader. Its attractiveness is such that the first reading is from cover to cover; its practicality requires that it be kept on the book- shelf of the technical writer for ready reference. Would that every QST contributor had a copy and used it. ABC of Yates. Published by Publishing Co., New trations. Price, $3.00. his job more Francis Henley 78 illus- Television, by Raymond The Norman W. York. 205 pages, A practical treatment of the elements of television with particularly chapters or. photo-electric cells, amplifiers and scanning methods. Still picture transmission is not neglected, and descriptions of the Siemens-Karolus, Bell Telephone, Cooley Ranger systems are given Television systems covered are the Baird, Jenkins, Alexan- derson and Bell Telephone Laboratories. Through codpera- tion of the latter, the author has been enabled to give con- siderable data on the experimental equipment developed by that organization. The volume concludes with a chapter in which detailed instructions for the construction of an experimental television receiver are given. Radio Traffic Manual and Operating Regula- tions, by Rudolph L. Duncan and Charles E. Drew. Published by John Wiley & Sons, Inc., New York (Chapman «& Hall, Ltd., London). 187 pages. Price, $2.00. An operating manual for the commercial man giving the regulations of the U. S. Department of Commerce and the Radiomarine Corporation. complete and

Silent Keys It is with deep regret that we record the passing of these amateurs: Gordon Jeffries, WSCZJ, Cleveland, Ohio. Hugo Anderson, W9BKN, lronwood, Michigan. Clyde Cunningham, WIAEW, West- field, Mass. Edwin H. Poad, WSUK, Cleveland, Ohio.

S@e Strays “is An excellent article on “Single Wire Trans- mission Lines for Short-Wave Antennas” by Everitt and Bryne was published in the October, 1929 Proceedings of the I.R.E. This is essentially

TAL RR Repor Over THRE|

Page 103

rts er- he nd ng Its to »k- at cis ley us- ith lls, 10D lus, en an- pra- ‘oOn- | by pter ila- E. nec., yn). r the | the rans ’ ober, tially Condensers you'll be proud to own These condensers are planned to meet the demand of discriminating purchasers who wish precision built instruments of fine appearance and highest efficiency. They should not be confused, because of their low price, with made-over receiving condensers or other makeshifts. They are super-station type instruments and adequate to take their place in the amateur station of today and tomorrow. Buy these condensers for the future. TANK CONDENSER MODEL 3 Follow best practice and give your transmitter that super station effect in appearance and performance with this unit. Same efficiency and con- struction as Model 2 but adjustable only by removal of plates. Size 434" x 34" x 1114”. Capacity .0002 mfd. Price $12.00 THE GENERAL ENGINEERING CORPORATION . VARIABLE TYPE MODEL 2 Electrical features of this condenser are its high conductivity, its hard rubber insulation in a very weak field, and its 14” spacing of heavy, rounded corner, aluminum plates. Its sturdiness is shown in its heavy truss type cast alum- inum ends, its over-size bearings and large tie rods. Overall length 11 in. Capacity .000175 mfd. Price $13.50 A We also manufacture power supplies and other amateur F’ and laboratory apparatus. Send dime for bulletins Charlotte, Mich. TALKS TO LONDON | FROM PLANE IN AIR, Reporter in Craft anneal “ESCO” Airplane Generators power for this remarkable achievement provided the Over City Has Conversation Across the Ocean, THREE CALLS ARE MADE Werde Understood Clearly In Spite of Static—Electrico Experts Pleased With Results. Two “ESCO” Airplane Generators (wind driven) were mounted on the Bell Telephone Airplane. One sup- plied power to the transmitter and the other to the receiver. Both were of standard *‘ESCO"’ design which Special to The New York Times. HADLEY FIELD, N. J., June 25.- Pying at ninety miles an hour today Wha thick fog blanket blotting out earth below him, W. W Chap ® Associated Press reporter, cas- wily turned to a microphone and ued for the London office of the | wwe association. The request. re wed through the laboratories of the Mi Telephone Company, passed on © the radio ocean radio telephone ‘ition at Belfast. Me , and then car The connection was made quickly wd Chaplin asked that Miss Martha Tarymple of the London office be fied to the phone. The conversa- 225 SOUTH ST. insures reliable service under the severe operating conditions common to aviation. Low wind resistance, light weight, non-corroding parts, ball bearings, tool steel shafts, steel shells, cast steel pole pieces, weather proof construction, many sizes to choose from, high voltage and low voltage windings to suit individual require- ments, are a few of the many reasons for ‘‘ESCO"’’ generators being the first choice. == RICE COMPANY Manufacturers of motors, generators, dynamotors and rotary converters PECiAny STAMFORD, CONN. Say You Saw It in QST — It Identifies You and Helps QST

Page 104

A New RECTOBULB Type R81 ney in — RECT TION LOAD CAPACITY REG! »N FILTERING To place of any Type 281 Rectifier Tube hat's all. I 7.5 Fil. Cur ; 1.25 | : so Plate Mils 150 Y¥ 10 VOLTS DROP IN TUBE Price $7.00 each : § with order — Immediate delivery ~ ME" as 3000-volt — 250 Mil Rectifier ask the “HAM” Price $10 each CHIRAD — Chicago — | | range Dist. Co., Albany, Bas Be | l'ype R3 RECTOBULBS | , Rect histributors Guaranteed Repairs $16.50 . >) Seer $16.50 rit eee eee $19.00 $60.00 WEE 6 evenves $40.00 | NATIONAL RADIO TUBE CO. 3420 reet San Francisco, Calif. 4 HAM INSTITUTION” VU believe our latest model micro- ne is the best value obtaina- ble. | mexcelled in workmanship, tty e in appearance and superb in performance, yet it is lower in price thar other. List 7 $67.50 Usual discounts Fr. JOHNSON CO. WASI MINNESOTA GET MUCH BETTER RESULTS! LAD the new aerial wire with its low- rface. A real help to transmission and n shortwaves. Many fail to realize etter than the condition of its aerial m aren't getting DX ! repiacing your old, corroded aerial ) today it ts best for picking up the 100-foot length only $2.00 postpaid. RADIO LABORATORIES P.O lakley Cincinnati, Ohio a more detailed description of the tests described by Windom under “Notes on Etheral Adorn- ments”’ and while of little interest to the traffic man, is a worthwhile paper for the engineer or experimenter. A device which enables a pilot to switch on airport lights from the air by pressing a button has been perfected recently. It consists of a min- iature radio transmitting set, effective over a twenty-mile radius, which controls the airport lights through a radio control system. The trans- mitter uses modulated waves. H. Barkhausen, of Dresden, Germany, and J. C. Bird, G2JB, of Wembly, Middlesex, Eng- land, were among those who attended the meet- ing of the Institute of Radio Engineers at New York City on October 2. The meetings are getting international. The following quotations are taken from an advertising pamphlet of radio tubes, picked up at the New York Radio Show: ‘*Radio Tubes make any set better.” “The less the air, the higher the vacuum, the clearer will be the resulting tones.”’ The last night of the New York radio show, six amateurs had dinner together in one of New York's restaurants. As one of them remarked, ‘Of the six amateurs, none are from the state of New York, and each one is a native of a different state.” The gang was composed of: W1A0Z, Waterford, Conn., WIFL, Hudson, Mass. W3BVA, York, Penn., W9BR, Chicago, II. W9CEI, Michigan, N. Dak., and W9I1G, Min- neapolis, Minn. Then, too, another reason the average ham is “broke” is because he has so many convention and hamfest pictures to buy. The New York radio show was an excellent furniture exhibit! A.R.R.L. Election Results (Continued from page 38) of them for the information of the membership In bidding au revoir to the retiring directors let remember that each of them for long years serve his division faithfully and to the very best of hi ability. They did their part in making A.R.R. what it is today. | BRUTE FORCE For that steam roller signal that crashes thru, gets there by flattenii every obstacle. A signal backed by that most powerful of rectifiers the mercury arc. Long, trouble-free life, full wave, instantaneous aut matic starting, current and voltage ratings far above any transmittel demand. Put in an arc and operate. RECTIFIER ENGINEERING SERVICE “5, 2 LR¢8"cnio"™ SE Say You Saw It in QST — It Identifies You and Helps QST