QST 1927-11: Vol 11 Iss 11

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DEVOTED ENTIRELY TO —e gg ~U BP 4 D IO 9UZ MADISON, WISCONSIN . Complete cription Tie | Qn this [ssue\)?) .

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a /j Ga WE hA/T ‘é es ‘mA Ags ‘ ” J lary af ‘ >? 5 are designed and built to combine all the qualities which 1927 broad- cast reception demands E. T. CUNNINGHAM, INC. NEW YORK CHICAGO SAN FRANCISCO

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cAnnouncing ARCTURUS A-C TUBES ; DETECTOR — AMPLIFIER — POWER Now to the convenience and economy of A-C operation is added unfailing quality reception with the reliable Arcturus A-C Tubes. All Arcturus tubes are of the heater type, em loying a negative temperature co-efficient eater that eliminates disastrous current surges. Unique features make possible un- failing reception of unusual tone quality throughoutalife wellin excess of 1000 hours. All leads, heater and elements, are brought down to a standard four prong base. Less changes need be made in adaptin D-C receivers to Arcturus operation than to any other A-C Tubes. We have prepared engineering and ser- vicing data on these tubes which we shall be pleased to send on request. ARCTURUS RADIO COMPANY Incorporated 261 Sherman Avenue, Newark, N. J. Say You Saw It In QST—It Identifies You and Helps QST

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Raytheon BA Chis 1s the Tube That Eliminates All Batteries R YTHEON TYPE BA—350 maa. is a remarkable example of what : he Raytheon Research Laboratories have accomplished through their f gaseous conduction. Again, the Raytheon ionized-helium principle tification shows its advantages over the old-fashioned filament. This be when used with the proper circuit produces from house-current a nt, noiseless flow of all radio power to receivers using the standard 1-A radio tubes in series. Several of the foremost receiving set facturers are employing the Raytheon Type BA tube with remarkable \ll batteries, chargers and outside power equipment being eliminated. ire considering light socket power for your receiver make it a point to a unit that has been especially designed to use the Raytheon Long Life fying Tube. Any one of the 40 Raytheon-equipped units can be identi- this green seal. Raytheon Manufacturing Company Cambridge, Massachusetts = Raytheon = THE HEART OF 1 Ae RADIO POWER Say You Saw It In QST—It Identifies You and Helps QST

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Section Communications Managers of THE COMMUNICATIONS DEPARTMENT, A. R. R. L. Eastern Pennsylvania 8BQ Maryland-Delaware-District of Columbia 3AB Southern New Jersey Western New York Western Pennsylvania Illinois Indiana Kentucky Michigan Ohio Wisconsin Dakota Dakota Minnesota Minnesota North South North South Arkansas Louisiana Mississippi Tennessee Eastern New York N. ¥. C. & Long Island North New Jersey Iowa Kansas Missouri Nebraska Connecticut Maine Eastern Massachusetts* Western Massachusetts New Hampshire Rhode Island Vermont Alaska* Idaho Montana® Oregon Washington*® Hawail Nevada Los Angeles Santa Clara Valley East Bay San Francisco Sacramento Valley Arizona Philippines* San Diego North Carolina Virginia West Virginia Colorado Utah-Wyoming Alabama Florida 4LK c Georgia-South Carolina-Cuba-Porto Rico-Isle of 4KU H Northern Texas Oklahoma Southern Texas Newfoundland New Brunswick Nova Scotia Prince Edward Island Ontario Quebec Alberta British Columbia Manitoba Saskatchewan ATLANTIC DIVISION H. M. Walleze 597 No. James St. ; B. Goodall 3EH W. Densham *. S&S. Taylor 8XE L. Crossley CENTRAL DIVISION E. Schweitzer 4264 Hazel Ave. J. Angus 310 N. Illinois A. Downard 116 No allas Wise 9187 Falcon Ave. C. Storck 694 Carpenter St. N. Crapo 443 Newton Ave. DAKOTA DIVISION R. Moir J. Beck L. Barker F. Cottam DELTA DIVISION 1824 Ingleside Terrace 140 Washington &t. 598 Masten St St 618 lith Street, South 3538 Third Ave. So 2408 North Pierce St 129 Camp St. 1708 23rd Ave. 4 Second St. eonard Clippard L C. A. Freitag 4. Ww L > Gullett Rush HUDSON DIVISION 2ADH-2AXR Earle 3 2CWR F. H 117-11 140th 8&t. 2wRk A. G Jr 50 Princeton St MIDWEST DIVISION SBKV A. W. Kruse Rt. 6, Box 19 SDNG F. S&S. MeKeever 1317 Mich. St L. B. Laisure 8010 Mercier 8&t. Cc. B. Deithi 5605 Cedar St. NEW ENGLAND DIVISION H. E. Nichols 82 Elmwood Ave. Frederick Best 13 E. Crescent St. E. 1345 Billings Rd., 30 Vassar St. 227 Main St. 2 Summer 8t. Peacox Box Mardon Wester, NORTHWESTERN DIVISION L. H. Machin Henry Fletcher 0. W. Viers R. H. Wright Otto Johnson PACIFIC DIVISION John A. Lucas B. Newcombe Wallace Quement Dann Patterson Mason Lamb Box 452 1610 N. 10th St 310 Ross St. 4340 30th Ave. W. Box 1142, Fort Shafter 109 W. Third St 252 Hanchett Av- 1821 Chestnut St 1338 Fell St 2530 N. St 220 W. First St . Jimenez 835 San Fernando St Sears 236 Bonair St ROANOKE DIVISION 4JR R. S&S. Morris 413 8S. Broad St SCA J. F. Wohlford 118 Cambridge Ave 8BSU -8HD Cc. 8. Hoffman 126 Chantal Court — MOUNTAIN DIVISION R. Stedman 1641 Don C. McRae 214 SOUTHEASTERN DIVISION 5AIP A. D. Trum 217 . E. Foulkes 502 Pine L. Reid ll WEST GULF DIVISION W. B. Forrest, Jr 502 Royal St K. M. Ehret 2904 N. Robinson E. A. Sahm 146 N. Academy MARITIME DIVISION — al Reid Avalon House B. Lacey e/o N. B. Power Co w C. Borrett 14 Sinclair 8&t. F. W. Hyndman 25 Fitzroy St ONTARIO DIVISION WwW. Y. Sloan 167 QUEBEC DIVISION Alex Reid 168 Logan Ave. VANALTA DIVISION A. H. Asmussen 10723 E. 8. Brooks PRAIRIE DIVISION F. E. Rutland, Jr. W. J. Pickering 6BDL 6vco Cc 6AM c 6NX I 6ZX w 6VR 6CBS 6ANO oplAT 6BQ Albion 8t CAA Belvedere 6RM Apts Catoma St Spearing St Shadowlawn Ave. St St. Close Ave llith Ave. 452 St. John Ave. 4DE 514 19th St. W. 4FC Longworth Ave e/o Forestry Dept. Radio Court House, Hazleton Washington, D. C. Collingswood Buffalo State College Chicago Indianapolis Louisville Detroit Columbus Milwaukee Fargo Milbank Henning Minneapolis Little Rock New Orleans Meridian Bemis Kansas City Omaha Bridgeport Augusta Norfolk Downs Worcester Claremont Westerly Poultney Cordova Boise Red Lodge Portland Seattle Oahu Yerington Long Beach Calif. San Jose Rerkeley San Francisco Sacramento Mesa Manila La Jolla Gastonia Roanoke Wheeling Denver Salt Lake City Montgomery Jacksonville Atlanta Waxahachie Oaklahoma New City Braunfels St. Johns St. John Dartmouth Charlottetown, P. E. 1 Toronto St. Lambert Edmonton Vancour+ Winnipeg Prince Albert “Temporary officials appointed to act until the membership ofthe Section concerned choose permanent SCMs by the nomination and election.

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yf YN E—Full, deep, resonant the Grebe Natural Speaker: A tone quality that is unrivaled for its naturalness, an ease of operation that is remarkable for its simplicity, and a refinement of appearance that harmonizes with any environment. Grebe Synchrophase Seven, $135; id all ; - Grebe Natural Speaker, $35. is what you enjoy with a Synchrophase Seven, Send for Booklet Q; then ask ticularly in combination with your dealer to demonstrate. « REB Q NCHROPHAS equaled in its natural- As the music is played, artist sings, so you ld hear it—true, rich, life so faithfully reproduced you forget you are listening ic aan 260 VE PALE RADIO I. Grebe © Company, Inc., 109 West 57th Street, New York City ond Hill, N. Y. Western Branch: 448 So. San Pedro St., Los Angeles, Ca! The oldest exclusive radio manufacturer Say You Saw It In QST—It Identifies You and Helps QST

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© e756499 ‘OT ¢ Jhe Official Organ of the ARR-L VOLUME X11" NOVEMBER, 1927: NUMBER 11 Editorials Weather Map Transmission and Reception édetans ....Thornton P. Dewhirst A Winder for Celluloid Supported Coils : , ... Porter T. Bennett “Motorboating” and Howling ne maetine ts Ok ...+eed. M, Thompson “My Phone Isn't Much—If Any—Broader Than C.W.”’ ; Robert S. Kruse The Long Way 'Reund cp ehudhbeShasidnanenes ae .G. C. Knight Fixed Transmitting Condensers Rotten Broadcasting Mounts for 250-Watters QSLL eebewee audits sant , . -«+++e++Harold P. Westman An Automatic Sender Full-Wave Self-R. ctification and Crystal Control The November Tests Amateur Radio and the Pacific Flichts J. Walter Grates and A. L. Budlong More About Clickless Keying ... ; ‘ ite «sess. .Blakely E. Cross Receiving Antenna Tuning Systems a ‘ |. H. Browning Experimenters’ Section Report lL. A. R. U. News Calls Heard Correspondence Department Northwestern Division Convention Statement of Own :rship The Rocky Mountain Division Convention Kansas State Convention Standard Frequency Signals From WWV Ham-Ads QRA'’s QST’s Index of Advertisers QST is published monthly by The American Radio Relay League, Inc., at Hartford, Conn., U. Official Organ of the A.R.R.L. and the International Amateur Radio Union Kenneth B. Warner (Secretary, A.R.R.L.), F. Cheyney Beekley, Editor-in-Chief and Business Manager Managing Editor and Advertising Manager Robert S. Kruse, Harold P. Westman, David H. Houghton, Technical Editor Assistant Technical Editor ba: Circulation Manager Subscription rate in United States and Possessions, Canada, and al! countriesin the American Postal Union. $2.50 per year, postpaid. Single copies, 25 cents. Foreign countries not in American Postal Union, $3.00 per year, postpaid Remittances should be by international! postal or express money order or bank draft negotiable in the U. 8. and for an equivalent amout 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 Accept- ance for mailjng at special rate of postage provided for in section 110%. Act of October 3, 1917, authorized Septem >er 9, 1922. Additional try as second-class matter, acceptable at special rate of postage provided for above, at Springfleld, Mass., authorized September 17, 1924. Copyright 1927 by the American Radio Relay League, Inc.’ Title registered at United States Patent Office. Member of the Badio Magazine Publishers’ Association. ae

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The American Radio Relay League The American Radio Relay League, Inc., is a non-commercial association of radio amateurs, bonded for the promotion of interest in amateur radio communication and experimentation, for the relay- ing of messages by radio, for the advancement of the radio art and of the public welfare, for the representation of the radio amateur in legislative matters, and for the maintenance of fraternalism and a high standard of conduct. It is an incorporated association without capital stock, chartered under the laws of Connecticut. Its affairs are governed by a Board of Directors, elected every two years by the general membership. The fficers are elected or appointed by the Directors. The League is non- commercial and no one commercially engaged in the manufacture, sale r rental of radio apparatus is eligible to membership on its board. “Of, by and for the amateur”, it numbers withiri its ranks prac- tically every worth-while amateur in the world and has a history of glorious achievement as the standard-bearer in amateur affairs. Inquiries regarding membership are solicited. A bona fide in- terest in amateur radio is the only essential qualification; ownership of a transmitting station and knowledge of the code are not prere- juisite. Correspondence should be addressed to the Secretary. Directors President Dakota Division Pacific Division AM PERCY MAXIM Cc. M. JANSKY, JR. ALLEN H. BABCOCK Drawer 2102, Dept. of Elec. Eng., U. of M., 65 Market St., Hartford, Conn. Minneapolis, Minn. Southern Pacific Co., San Francisce Delta Vice-President BENJ. F. PAINTER plas ARLES s 424 Hamilton Nat’] Bank Bldg.., Roanoke vision an te Ghattencesn, ‘enn. W. TREDWAY GRAVELY Box ° Danville, Va. Hudson Division se Gear Manager DE UREN gO Cc ae Broa se MRE Bi Toronto, Ont. Midwest Division c/o District Attorney PORTER H. bt tf West Side Court Bldg., 1034 Planters’ ilding, Denver, Colo. itlantic Divi St. Louis, Mo. UGENE C. WOODRUFF ee Southeastern Division : New England Division HARRY F. DOBBS W. Fairmount Ave., DR. ELLI ~ WHITE Ww Co. ate College, Pa. Da th College. c/o a = on ° Hanover, N. H. entral Division Northwestern Division West Gulf Division LYDE E. DARR K. W. WEINGARTEN FRANK M. CORLETT Ave., Highland Park, $219 No. 24th St., 2515 Catherine St., Detroit, Mich. Tacoma, Wash. Dallas, Tex. Officers President ... 4 - HrraM Percy Maxim, Hartford,Conn. Vice-President . .. . . . CHas. H. Stewart, St. David’s, Pa. Secretary . . . . . . . KENNETH B. WaRNeER, Hartford, Conn. Treasurer . . . . . . . ARTHUR A. Hepert, Hartford, Conn. ‘ommunications Manager . . F. Epwarp Hanpy, Hartford, Conn. idress General Correspondence to Executive Headquarters, Hartford, Conn. —

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EDITORIALS amateurs are probably the only group of people on earth which finds the size of the globe a real restriction upon its activities ? Can anybody think of any other group whose individual operations actually take in the whole globe and who can go no further because the world isn’t any bigger? We think our position is truly unique in this respect. If only we amateurs had a bigger world we could work farther, do more things, engage in more activities. We’re ab- solutely held down now to the dimensions of this pigmy planet. Now if only this earth were the size of that great star Betelgeuse, whose diameter is so large that it takes forty-five minutes for radio waves to traverse it as compared with one-seventh of a second on this Vale of Tears, we would have some new fields to conquer. Imagine sending out a CQ for the Antipodes, going out for a leisurely lunch, and finding the time just about right upon returning to slip on the cans and listen for a reply. Yes, that would be a new field with a vengeance! It not infrequently happens that in this particular little office we are quite con- vinced that the dimensions of our present earth are more than ample—that if there were any more problems to solve, any more business to handle, we would blow a con- denser somewhere and go up in smoke. But it is an interesting thought that only the dimensions of our globe prevent our DX from being greater. When we work our present Antipodes that’s all there is; there isn’t any more. LD = you ever stop to think that we N certain parts of the country it would appear that the insurance folks are putting on a campaign to inspect and in- vestigate radio installations and either eliminate those installations that they re- gard as a hazard or cancel the insurance. In the main, of course, such an effort is per- fectly proper but in recent weeks we have received letters from several amateurs who have encountered a local agent who has been entirely unaware of the existence of such a thing as a “transmitting rider” and has accordingly informed the policy-holder that transmitting equipment is “out.” Not so, not so. The ordinary rider ac- companying the usual form of policy gives permission to operate a receiving set when equipped with the usual lightning-arrester, etc., and says that transmitting equipment is prohibited. But don’t you remember all those provisions in an underwriters’ code about the dimensions of the blades in light- ning switches, the height of stand-off in- sulators, and how lead-in bushings have to extend beyond the wall so many inches on each side, and so on? Those are the regu- lations for transmitting stations, and ama- teur stations that comply with them and are satisfactorily passed by an inspector from the underwriters’ bureau can obtain an additional rider on their policy, permit- ting the operation of the amateur station, with no increase in rate. We know because we’ve got one. So the agent isn’t the final authority and he doesn’t always know what he’s talking about. Tell him about the existence of the special form to permit transmitting. In- cidentally, every amateur station ought to be installed in accordance with these regu- lations and it is particularly worth the while of an amateur who owns his own home to see that his installation is inspect- ed and passed and the necessary rider is- sued so that there will be no question about the validity of his insurance. A few of the regulations are a bit dizzy but in the main they are only sensible—requirements which every station should observe anyway—and in any event they are all easily attainable. NOTHER month passes and at this A writing we are on the very eve of the big radio pow-wow at Washington with all of its dangers of international re- strictions on amateur work and all of its glorious possibilities of an enlarged recog- nition and encouragement of amateur op- eration. The preliminaries are over, the main bout looms. One of the difficulties of writing about current news in a monthly magazine is that it is pretty certain to be “old stuff” by the time it reaches print. By the date that these engaging lines encounter the eye of the American amateur there may be per- fectly momentous news from Washington. It seems futile after a fashion to be en- gaged to-day in writing generalities and trivialities about this pending conference, but we do want to make the record com- plete and we believe that all the members

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OST are interested in the unfold- affair. ficant development during e American position, so far mateurs, has been a further intent of this Government amateurs and provide liber- und the specification of ama- meters and at 0.75 meter American waves. So far, nusual opportunity this past Canada and assist Canadian r Russell in his representa- e Canadian delegation on be- n amateur radio. In recent as always granted her ama- exactly the same privileges had in the States, so that uniformity on both sides Canadian amateurs desire of those privileges, so it l’s policy to urge his Gov- ipport the proposals of the lelegation. This he did most a reaction altogether favor- Canada is just as sold on her r country is. We feel sure may be relied upon to join United States in proposing t of the present North Amer- amateurs everywhere, and t she will see that her ama- juately protected. ere in Canada we had the ng the British delegation, embling there with the dele- the British dominions before Washington. They were meeting at which Mr. Rus- the Canadian delegates. They nterested in the amateur sit- ked many questions. They many amateurs there were ind were almost dumbfounded there were 16,000—they had r proportions. They wanted wavelengths our Govern- and did not know that and Canadian amateurs had 20-, 40- and 80-meter bands They wanted to know how r with our Governments. They iow what the United States attitude was towards us, and the opportunity to make a unded like a QST editorial. that our Government valued amateur because of his ad- ’ the radio art, because he was nself to be a skilled operator, stations formed a wonderful NOVEMBER, 1927 reserve communication net, and because he was doing much to advance world under- standing by his contacts. The gentlemen were not at all unfriendly. On the con- trary they were immensely interested. We consumed nearly an hour of their time with no sign of impatience on their part. We were particularly struck by the fact that the British representatives did not seem to know anything about amateur radio. How does it come, we wonder, that our amateurs over there have been so back- ward about introducing themselves to their officials? It seems that our amateurs over there are “scared to death” of their officials and have just about never made any clean- cut representation before them. We don’t know why this situation should exist. We thought them quite approachable and open- minded—they were not antagonistic, they were merely abysmally uninformed. They had no idea our Government regarded us favorably—they didn’t know! There is, we believe, a profound moral in this for the amateurs of all nations. We asked the British delegation for their favorable consideration of the United States proposal to make the 20-, 40- and 80-bands available for amateurs. Altho they were non-committal on this, they indicated that they were not at all opposed to the idea of short waves for their amateurs, and they did pledge themselves to see that their ama- teurs were given their own conception of adequate short-wave privileges. Compare that with their reputed attitude! And when we arose to leave, instead of having an opportunity to express our thanks for being heard, they thanked us for having spent so much time in coming to them and telling them this interesting story which would help them in their work as a delega- tion! This delegation consists largely of the folks who run radio in England. We hope that this account of our adventures with the delegation will simply make the hair stand straight up on the heads of British amateurs. Get onto yourselves, you fellows over there! One more item in closing: Italy, which originally proposed that no special services (including amateurs) should have any waves below 100 meters, has amended its proposals and now suggests a number of short-wave bands for amateurs. They aren’t our bands but that’s not the point: they are bands, and they are short-waves. That, and the opening wedge in the British situation, are good omens as the October conference dawns. K. B. W.

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NOVEMBER, 1927 Ost Weather Map Transmission and Reception By Thornton P. Dewhirst* T a conference held in the offices of the Jenkins’ Laboratories, during the latter part of last July, it was decided by those present (Professor Marvin, of the Weather Bureau, and Cap- tain McLean and Commander Hooper, of the Navy) to run a series of experiments to determine the feasibility of transmitting weather information in map form to the ships at sea. It was evident from the start that the simpler the machine the better, since it would be highly undesirable to produce a machine which could not readily be operated by Navy personnel. Of course, a compli- an oe TE St vee s spree Neate a cated photographic machine might give somewhat better re- sults, but the exact- necessary in good picture work is not required to put a map through the air to be received in ink aboard ship. Also, such a photo ma- chine would require the operator to at- tend a school of in- struction for a lengthy time, which again is unfavorable. Therefore, with simplicity as the main requirement, the machine about to be described was de- veloped from the many varieties of models to be found about the Labora- tory. It will be seen in the following de- scription that very little knowledge not already possessed by the average radio op- erator is needed. A small quantity of good horse-sense applied here and there is suf- ficient. The method of picture transmission has been described so many times that it is hardly fitting to go into details here. Let us say that fundamentally it consists in tak- ing the picture to pieces at the transmitter in a certain linear manner, and at the re- ceiver or receivers building it up again in the same manner. In this process it is ness JENKINS © SYSTEM on by radio. *428 Manor Place, N. W., Washington, D. C. necessary that the transmitter and receiver run in synchronism with each other. A more detailed explanation is given in QST for December, 1925. THE BASIS It was at once decided that a c.w. or i.c.w. transmitter would be the only practical transmitter to use since the machines were to operate over a considerable distance and in conjunction with the existing Navy radio stations. Therefore, both synchronizing signals and picture signals must be trans- mitted on the same wave. From the mere “Weather Map by Wadic ret j 7 19898 a 2% A WEATHER MAP AS RECEIVED The printed “base map” was placed on the receiving cylinder and only the actual weather information put fact that we are us- ing a c.w. or i.c.w. wave, it is almost out of the question (though not entire- ly) to send a given frequency as_ the synchronizing _ fre- quency. A_ straight c.W. or i.c.w. impulse bearing a definite re- lation to the trans- mitting driving mechanism is, there- fore sent, and the receiving machine’s driving mechan- ism is made _ to run slightly fast- er than the speed represented by this impulse. The _ im- pulse is caused to operate a_ device which momentarily stops the receiving cylinder (these ma- chines make use of the time-old cylinder idea), and releases it the instant the im- pulse is cut off at the transmitter. tion—that is, the transmitter and It will be seen that although the syn- chronization signal does not operate con- tinually, as it might be made to do, even though it is transmitted intermittently, it does correct the machine every revolu- tion—that is, thee transmitter and receiver always start each _ revolution at the same instant. The error is, therefore, not collective or accumulative, and the greatest error possible is the greatest error that can occur in one ¥ 258.\ 9~ \\\ NN

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Ost cylinder. Of course, this n each and every revolu- ruarded against by running chine at as nearly a con- ossible. It takes a rela- error to spoil a weather the machine operate as possible the motor is con- rnor. The method of con- ned a little further on. expedient that the trans- run at a very constant iin this speed the trans- either with a synchronous ng fork controlled motor. NCHRONIZING f controlling the speed of a ning fork is shown in Figs. follows: f a simple shunt feed d.c. a resistance which will » run at a speed greater In the armature circuit is sistance which will cause % Wound fotor | ahaa gs 60 Cycle Tung Fork — > NCHRONIZING DEVICE AT THE TRANSMITTER id normally tend te run a little above armature resistance R2 tends te wer. If the motor runs at 1800 r.p.m. ing fork contacts and the contacts nmutater will operate together, he resistamce R2 whenever the con- loeed. This speeds up the motor. If » go too fast the contacts do not M2 is always in the circuit and ine mn agam. the given field resistance still slower than 1800 r.p.m. this armature resistance is tact of a 60-cycle tuning fork, ontact of the tuning fork is side of a special commutator the shaft of the motor (this akes two contacts per revolu- vr), and the other contact of or is connected to the opposite nature resistance. We, there- he tuning fork and tail piece or nutator in series with each parallel with the armature re- s armature resistance is made NOVEMBER, 1927 variable so as to make it possible to adjust phase position of the motor, and for ease in starting. See Fig. 1. It will be apparent that if the motor runs at such a speed that the tuning fork and tail piece make contact at the same instant, the armature resistance is cut out and the motor will tend to run too fast. However, when it tries to run too fast the tail piece and tuning fork do not make contact at the same instant, and the only path for the armature THE 60-CYCLE SYNCHRONIZING FORK AND THE MOTOR WITH TIMING COMMUTATOR The fork is roughly adjusted to the desired frequency by means of the cylindrical sliding weights clamped on it near the bent end. Looking thru the eyepiece at the left of the fork the observer sights on the strip across the end of the motor shaft. He is looking thru a narrow slit which is open only dur- ing the midswing of the tuning fork ends. If the strip on the motor seems to stand still the motor is timed ph A if it seems to turn slowly the motor must be adjusted. current is thru the armature resistance. The motor, therefore, slows down and in doing so the fork and tail piece make contact simultaneously, and the motor again speeds up. It is, therefore, evident that in a short period of time the motor will be running in exact synchronism with the tuning fork. The special commutator or tail piece has on it a bar of polished brass which is observed through an eye-piece on the tuning fork. By stroboscoping this brass bar through the eye-piece of the fork, it is possible to detect synchronism between the two and by ad- justing the armature resistance at the same time, the correct phase relation may be established.’ The fact that this control works in the armature of the motor has several ad- vantages. In the first place, it is consider- ably faster in action than the same method would be if applied to the field. In the second place, the high inductive kick which is produced in the field coils when the con- trol functions there, is to be avoided, espe- cially if the apparatus is to be in operation near a high frequency receiver. To reduce the sparking at the special commutator a 12 yufd. condenser is placed across it, and across the condenser is placed a 400-chm potentiometer in series with a 2 ¢.p. lamp. By varying the potentiometer the lamp can be made to glow constantly 1. The meaning of this is explained in the label of the photographe of the tuning fork.—Tech. Ed.

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NOVEMBER, 1927 when the motor is under control and it, therefore, serves as a visible indicator of the control’s operation, and can be observed from any part of the room. [If the control drops out the lamp will immediately begin to blink. The lamp and resistance also serve to discharge the condenser. A slight modification of this device is made in the receiving machines. In place of the tuning fork and special commutaior, a governor is substituted. This governor acts in a manner similar to the above mechanism if the machine runs too slow it short- circuits the armature resistance and the motor speeds up. If the motor runs too fast the governor breaks contact and the current is fed the armature through the resistance and the machine slows down. (See Fig. 2.) This method is, of course, not so accurate as the control on the transmitter, but is sufficiently constant for the use to which it is applied since the cylinders are corrected each revolution by the synchronizing im- pulse from the transmitter. One more diversion before entering upon the machines proper, and that in regard to the photo-electric cell used. It was decided that although the distinction to be made was between complete black and complete white only—that is, the transmitter was simply to be keyed in picture units—it would be best to use some form of photo-electric cell and not rely on a straight contact de- vice. The cell, of course, would be far more reliable. THE PHOTO-ELECTRIC CELL The photo-electric cell used in the trans- mitter is called a “Thalofide Cell”. The ma- terial of which the cell compound is com- posed consists of thalium, oxygen, and sulphur. This compound is fused on a three- quarter inch quartz disc and the disc wov OC Supply Governor 4 Contact 200 ohms 250 4% FIG. 2. THE SYNCHRONIZING DEVICE AT THE RECEIVER The receiving motor simply runs under control of the governor which is set to give a siiall amount of overspeed. Once per revolution the receiving cylinder is halted for an instant until the proper received im- pulse releases it again in exact step with the trans- mitting cylinder. ’ mounted in a glass bulb, which is then placed under vacuum to prevent oxidation and increase the sensitivity of the photo- active material. In placing the cell in the amplifier circuit, the cell and an artificial resistance (grid leak) are balanced so as to establish an equalibrium when the light falls on the but- ost 11 A forty-five volt B battery (See ton of the cell. is used as the cell voltage source. Fig. 3A.) The potential of the battery is divided practically equally between the “Thalofide Cell” and the grid of the tube. The grid leak is made equal to the resistance of the cell when exposed to light. This gives a nega- r ieee TWO VIEWS OF THE TRANSMITTER A photographic film negative of the map or draw- ing to be sent is wrapped around the glass cylinder for transmission. A ray of light from the small lamp house at the right passes thru the motor driven slotted wheel which chops the light ray, thereby put- ting a tone on the signal. The light then proceeds along the axis of the cylinder until it meets the mirror or prism which sends it out radially thra the glass and the negative inte the photo-electric cell which is located in the small pillar box at the front of the machine. As the cyclinder revolves the lamp, chopper, mirror or prism and photo-electric cell are all moved endwise so that they take the picture apart inte successive strips and transmit corresponding im- pulses to the radio transmitting circuits. tive potential to the grid of the tube which reduces the normal plate current flow. When the light is cut off (by a light chopper to be explained later), the resistance of the cell rises immediately and the grid voltage drops to a very small value. THE TRANSMITTER In the map transmitter proper, a glass cylinder is mounted in a supporting frame and geared to the motor for rotation. Suit- able reduction gears are provided so as to make the time of transmission for the given area (in this case of the weather map 8” x 10”) either 25 or 50 minutes. One of these reduction gears is employed to rotate a threaded shaft upon which rides a half nut carrying the photo-electric cell. A shaft is connected between the cell carrier and a small truck. Upon the platform of this truck is mounted a light source and a small motor which drives a metal disc with holes in its periphery. This disc and motor serv- as a light chopper which gives the light

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Ost racteristic and produces a tone rs which is readily amplified transformer equipment. The ng through this chopper is tem of lenses to a point in- er just opposite the photo- \ mirror at 45 degrees, or a light at right angles here, through the glass cylinder ve of the map placed on the through a small aperture in \l which rides on the outside Here the light rays are electrical impulses and carried phic negative is used here in a positive because of the fact ng from a_positive, there are 12 J baseatit PRET iLL, 4| | +8- }__L sinjothajojelojole Cc D PUSH Pui STAGE ON CowrRrot THE TRANSMITTING Thalofide” photo-electric cell. anamitter. the lines to be transmitted are ith of the aperture and under the aperture is completely a small fraction of the time, h the use of a negative the cell r a considerably-longer and period. aperture is about 1/60” in ch makes the lines per inch was found to be sufficient for the average weather map. The poken of is so geared that the moves longitudinally 1/60” for 1 of the cylinder. THE RECEIVER the transmitter and jump to for a few minutes now. Tak- ted that we have taken the currents produced by the cell trolling by wire the 40 Kw. 36 tter at Radio (Arlington), Vir- desired fashion. ceiving end we have a 36 Ke. er of the conventional type, and the desired signals and ampli- ole NOVEMBER, 1927 fied them sufficiently so as to be able to con- vert them into d.c. “on” and “off” conditions capable of operating a stylus or relay. Never mind how we have done this, we will return to that shortly. Now for the map receiving machine proper. Here, again, as in the transmitter, we have a cylinder geared to the motor in the same fashion. We also find the threaded shaft, but instead of carrying a photo- electric cell this time, it carries a sty!us or pen box. The amplified signals from the receiver cause this pen arm to operate and the map is built up line by line as it is taken apart at the transmitter. The synchronizing signal which is transmitted every time the joint in the map negative passes the aperture in front of the photo- electric cell at the transmitter is automatically switched from the ink recording box to a syn- chronizing box which causes a lever to grip the cylinder and hold it for a short period until the signal terminates. The cyl- inder is thus brought into exact synchronism at the beginning abiatait 4 Bor4RoD CIRCUIT The current from asses thru the cell and the grid leak in series; as tance varies with the reteived light, seo the current in turn changes the voltage drop across the leak— e grid voltage of the tube. As the cell “explores” the slses thus started are sent thru the amplifier system of every revolution. The cylinder of the receiver when running uncontrolled will, of course, run slightly faster than: the cylinder of the transmitting machine. It should be understood from the foregoing that we now have the receiver or receivers running in synchronism with the trans- mitter, and that the map is be- ing torn down and built up piece by piece as the cylinders re- volve in synchronism and the cell on the transmitter and the pen box on the receiver move along their respective threaded shafts. SOME PRECAUTIONS At this point it may be well to say a few words in regard to the placing of the machine on board ship. Naturally, with the ship rolling 30 to 40 degrees as is often the case, some precaution not observed on land must be taken. The point to be remembered in locating the machine on the ship is to so place it that the roll of the ship does not affect the governor to any great degree. The axis of the governor should be paralle! with the length of the ship for best results. One effect to be on the guard for on high frequency was also noted. The map machine worked beautifully when an abundance of signal was at hand such as was generally the case in the laboratory. However, when the signals were weak, as is sometimes the case, especially at a good distance from the transmitter, the results were not so excellent. In order to bring the signals up to their maximum, it was, of

Page 15

NOVEMBER, 1927 course, necessary to turn the regeneration dial of the receiver down very close to the critical point. In doin* so you were greeted by a continuous chatter of the pen arm. Upon cutting off the motor of the map re- iver the noise disappeared. The disturb- ance was found to come from minute spark- ing occurring at the commutator of the motor. Although these sparks were not al- ways (in fact very seldom) visible, they were audible in the radio receiver. Re- member, this is at a frequency in the vicin- ity of the 6000 Ke. (50-meter) part of the radio spectrum. It seems possible that these sparks constitute very low power yet extremely high frequency spark transmit ters which by means of the capacity between the different parts of the motor and machine are passed to the leads connecting the map machine with the radio receiver, and using these leads as antennz proceed to oscillate and radiate their energy which modulates the incoming signal through the detector which is, of course, in an extremely sensi- tive condition when set so close to the critical point. Whether this is the case or not, small chokes consisting of about 10 turns %” in diameter placed at the point where the leads leave the map machine help the matter considerably. Also, two micro- farad condensers connected in series across the line and the mid tap grounded help mat- ters to a degree. A pair of 40-turn choke coils of No. 20 wire 2%” in diameter will also eliminate a large portion of this noise. No precaution in regard to the above needs to be taken as long as the wavelength ised is above 600 meters. While on the discussion of the effects at high and low frequency, it might be stated that at low frequency a straight c.w. wave is considered best because of its excellent carrying quality and the fact that the heterodyne note can be chosen to suit the conditions and passed through an audio tuning unit and a large portion of the static lost. Also, the receiver can be set once at this frequency and then almost entirely for- gotten. At high frequencies (short wave), however, it has been found that an i.c.w. note is more to be desired, since at high frequencies the general run of receivers cannot be set and left to function un- attended as in the former case, and the side bands produced by the modulating of the high frequency wave are helpful in the find- ing or locating of the signal, as well as in holding the signal during the reception of a complete map. Any variation in the transmitter or re- ceiver is somewhat counteracted by the wave being spread out in this fashion. As a general rule in the reception of maps the regeneration control of the receiver is placed as near the critical point as possible with- out causing the signal to become unsteady. OST This, of course, produces the loudest signal at the detector output. From the detector the signals are passed through a two-stage amplifier and then through an insulating stage. The purpose of this stage is to prevent squealing between the two- stag amplifier and the control board. (See Fig. 4B.) The receiving control board consists of two blocked tubes connected up in a push- pull fashion. This unit functions both as an amplifier and rectifier, and supplies d.c. to the pen box. A control tube of this E RECEIVING MACHINE ON WHICH A MAP IS SHOWN COMPLETE The small device at the extreme left is the belt-driven governor which operates as shown in Fig. 2. The mechanism at the left end of the cylinder is a com- bined clutch and switching mechanism which permits the stopping of the cylinder for a moment at the end of each revolution until the transmitting cylinder again releases it for another turn. nature was described in the article on Prac- tical Picture Transmission in the December, 1925 issue of QST, but it rectified only one half of the cycle. In the present control unit both halfs of the a.c. component from the amplifier are used. Two tubes are used and twice the amount of current is, there- fore, available. The double rectification, of course, produces a d.c. output which is much easier to smooth out than the single tube output. In the unit used, a 1 ufd. condenser serves the purpose admirably. (Note C of Fig. 4.) rHE TRANSMITTER CONTROL It looks somewhat as though we were ahead of ourselves, however, since we have gotten the signals through the amplifiers, and to the pen box before we have gotten them on the air. Let’s see, we left the cell feeding a vacuum tube pulsating current in picture units. The a.c. component of the plate circuit is now passed through an ordinary two-stage amplifier. We chopped the light up for this very purpose you will remember. I said ordinary two-stage ampli- fier, but perhaps I should modify that since it is a very well shielded amplifier, in fact

Page 16

OST fiers at the transmitter are hielded, including the A and B eads to each unit and the bat- lead-covered and grounded. two-stage amplifier they pass xtra stage similar to the one the receiver, only here, 1 B batteries are employed stage floats—that is, is not nnected to the ground. (See yf this stage passes to a con- milar again to the control unit r, except in this case there NOVEMBER, 1927 to operate. This type of relay is used on the transmitters at Bellevue. It is some- what more delicate of adjustment than the one referred to above. In the control of the transmitter, grid keying is employed for obvious reasons, also as a general thing the keying takes place in a master oscillator since it is desired to control considerable power. The three methods shown in Fig. 5 are fundamentally the same, varying only in slight detail. In Fig. 5A, we have the keying system employ- ed on the “Z” or 36-Ke. set at NAA. A tube supplying rectified 500-cycle as negative C at about 700 volts is connected to the grid of a 5 Kw. oscillator through a limiting resistance, con- denser and leak, and a resistance to prevent high frequency oscilla- tions. One side of the relay is con- nected between the limiting resist- ance and the leak and condenser and the other side of the relay oo ceeesdo ric. 4. THE RECEIVER SYSTEM uctance-capacity inter-stage coupling unit is » prevent squealing when the output of « « fed inte the control beard as shown. Such ve is frequently helpful wherever additional Note that the filament es are independent as shown here. A common with feed thru chekes might work satisfac- The push-pull output stage is keep the plate current out of the pen system. eges are te be used, 1 some cases. on each side of the cycle. The plate circuit of this unit relay of the set to be con- a relay which controls a line at the set. UX-171 tubes are und by paralleling them in this impedance of most relays can tched and enough current ob- lean and positive action of the the subject of relays, it might t we have found that a relay urm is very useful in this type if the transmitter itself lags - if the land lines are heavy up the difference by adjusting that the long arm will bow and ontact for a longer period of s actually actuated. This type essentially known as a high y and the long arm is generally ‘lite. It requires about 200 mils » operate effectively. This is relay employed at Arlington , 40-Kw. transmitter, and used Navy Department to control eading to Arlington and to igh-speed relays are also very juire considerably less current stctte. goes to ground through a resist- ance which supplies the normal negative C when the relay closes connecting the grid to the filament through the ground and resistance and the 5-Kw. M.O. tube oscillates. In Fig. 5B, we have the keying system used on the high frequency transmitters at Bellevue. In this method, the grid voltage is changed from a high blocking voltage to the operating voltage in a very similar manner. With the relay open, the negative C path is through the high resistance and _ its value is such as to completely block the tube. Little or no voltage drop is experi- THE PEN BOX OF THE RECEIVER The pen is fed with ink by the small siphon-wick and is operated by the electro-magnet in the housing. When used vertically the inkwell is naturally put in a different relative position. enced through the high resistance since the grid does not take any appreciable current. When the relay closes, the larger part of

Page 17

NOVEMBER, 1927 the negative C supply is shorted by the high resistance, and the grid connected to the re- maining C-voltage which is adjusted to the normal operating condition. Again, due to the high value of resistance, very little current flows through the resistance. The OST 15 proper condition it will follow extremely fast keying. The transmitter as a whole should possess the qualities required of any good commer- cial set which is to operate over a period of several hours. So-called key clicks and BRIA and Art ‘OseMater Re/a y > 6 Cc FIG. 5. CONTROL METHODS AT THE TRANSMITTER A is the keying system used on the “Z” set on 36 Ke. and with 40 Kw. at NAA, Radio, Va. Rectified 500-cycle supply is fed by transformer Tr and rectifier tube at left to the grid of the escillator at the right. The transformer Tr and the rectifier tube supply a high rectified grid-bias voltage to the oscillator thru the resistances R1, R2 and R3, thereby almost completely blecking the oscillator. When the relay contacts close this bias is practically removed and there remains the normal bias caused by C and R2. The rectifier is protected from overload by the limiting resistance R1. At B ia the scheme used on the high frequency sets at Bellevue Naval Research Laboratory where NKF is lecated. When closed, the relay shorts out part of the C bias, allowing the tube to oscillate. The C battery is shorted thru a resistance R and therefore is not injured. C is a keying system used on one of the r.f. amplifier tubes instead of the oscillator. high resistance also reduces the sparking of the contacts on the relay. In Fig. 5C we have the grid of the ampli- fier free with the relay open and the operat- ing -C voltage applied when the relay is closed. The grid is free to assume any volt- age, and for this reason the circuit is some- what delicate to handle, although in the Strays S5 . The gang at one of the High Schools in Whittier, Calif., had been missing QST for several months and to their surprise, dis- covered that the Physics Teacher had been taking it home and reading it through. He said it was a “wonderful book”. It sure must be to give a Physics Instructor such “taking ways”. Amateurs, both foraign and domestic, with new or reassigned calls are requested to send them in with the address and in- formation on them as below: Call 9HASH Name Will Q. R. Tee. Address Seekew, Il. Power one UV-202 Wavelength 76.5 meters This should be printed clearly so that no error will be made. A post card will do. Address it to the Information Service. Do not send this information in if your call is correctly listed in any present day call thumps are of necessity avoided. A sharp clean wave is, of course, desired. The above should furnish a broad gen- eral idea of the requirements for weather map transmission, and should also point out a few inferior details some of which are to be avoided, others to be employed. book. This has no connection with the QRA section in the Ham-Ads and does not re- place that service. Winthrop Bellamy, has a son, thirteen, who is getting acquainted with the code and who saw the issue with QRT on its back - cover. He looked worried and said, “Say Dad! Why did they send that to you? Do you think anybody heard me pounding brass without a license?” We are told by 7AIX-7AAY that after re- pairing his filament lighting transformer, he found that the note had a decided ripple in it that was not present before the trans- former needed fixing. He had no potentiom- eter at hand to shunt across the filament and obtain a center and thought of using a reactance to smooth out the fluctuations. He tried some coils and found the primary of a G.E., 12 volt, bell-ringing transformer to help considerably. The accompanying circuit shows just where it goes.

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OST NOVEMBER, 1927 . Winder for Celluloid-Supported Coils By Porter T. Bennett* HAS been said in the columns ST about coils, all kinds of oils full o’ dope and coils ire fair, but nary a word the making. Always we are e wound air core, air spaced, oils. lows, just keep your seats i how to rig up a gadget and these coils for less cost at have a form. Refer to gives the design and dimen- I obtained a 3%” x 28” square s — Big at this p Lene with - = 23 ne Soe —a Rud < 4———T 3 ain i sali A rN rHE FORM BEFORE TURNING

wood (sugar pine, birch, maple easily worked wood will do) n a fine saw as shown. Next, ountersunk and set as shown is in order to hold the piece together while working it on the. the work in the wood turning it down to 3” diameter. ng; remove and drill two 4” and insert therein two 3%” x necessary washers and wing ove the wood screws A A A. a mounting is shown in two 3%” automobile radi- imps and you are ready to wind pporting material on which the ind is common auto-curtain can be had in sheets about $1.00 to $1.50 per sheet and supply a whole bunch of support material. Place the

HE FINISHED PRODUCT end of the mandril and cut celluloid %” wide x 28” long nds under one clamp 60° from | set the clamp on them good Pull the other ends out tight me one to turn while you feed with a fish line spacer running St.. Dallas, Texas between, after the mandril is full, secure the end of the wire and unwind the string, you should now have a mandril full of the most beautiful spaced-wound wire. And right here fellows is where we fix ’em up big of gluing down the wire in a permanent and satisfactory manner. I read in QST that Doc Bidwell over at Washington recommends DuPont’s House _34'x4" Bolts

Auto Hose Clamps 2—THE FINISHED FORM WITH CLAMPS IN PLACE FIG. hold Cement for the job. You’re right Doc; I do too. We fellows here in Dallas have been using it for about two years now. Pro- cure a tube of the above cement, which is a good thick liquid celluloid and squirt a thin stream of it down the top of the wire form over each celluloid supporting strip. Presto! The cement enfolds each wire in a firm embrace, flows down onto the celluloid strip through the interstices of the space winding, softens the celluloid and forms a part of it. After about two minutes take a knife blade and trowel and spread the cement by running the blade down the form. This causes it to cover more of the support- ing strip and give a better bond. Use cau tion and don’t waste the cement as a thin — afin T |

Saar?

Mounting 3 “ll” attached under end bolts mth shalt ard crank extending att for bearmgs Same thong €83 crank oo other ond FIG. 3—A MOUNTING THAT MAY BE USED If THE LATHE IS NOT AVAILABLE WHEN THE WINDING IS TO BE MADE The rig may be carried in wooden bearings, or Babbitt metal bearings cast in wooden supports stream does the work as well as great gobs In about one hour the coil is ready to cut and use. I also find one may wind solid non-spaced forms and spaced and spread three lines of the cement on the outside 60° apart and cause the coils to hold very excellently. In order to remove the form lift it from the mountings, remove the end bolts and slip the two sections out of the coil at opposite ends, being, of course, gentle and easy in order not to tear up a nice piece ot work. Various sizes of mandrils may be made t« wind various coils and radio frequency chokes.

Page 19

NOVEMBER, 1927 OST ‘Motorboating” and Howling By J. M. Thomson* OTORBOATING” is the name given to the low frequency note or rattle which occurs in some receiving sets when used with certain B elim- “Motorboating” may also occur in some sets using B batteries. In the latter case the audible note is usually of greater frequency than an audio whistle or howl. To distinguish between these two cases, only the audible note obtained with B eliminators will be called “motor- boating” while that higher frequency note occasionally encountered with sets using B batteries will be called howling. “Motorhoating” is generally due to of two things: 1. Improper eliminator. 2. Back coupling in the output system of the B eliminator. The designs of filter systems have been improved so much in the last six months that motorboating from this cause has been very much reduced. The audio output system of the receiver is now usually the source of trouble when motorboating is present. Motorboating will occur in audio amplifiers with resistance, inators. one filter systems in the B "e ——#/o/s- 1" 4 S wei, _ + - Owe, Pewbevnmnrtanwnnnent ——- - — $ th} 4 >) “¥ bso FIGURE 1 DIAGRAM OF A TYPICAL DETECTOR TWO-STEP RECEIVER FOR ANALYSIS WITH REGARD TO TENDENCY TOWARD MOTORBOAT- ING AND HOWLING Because most such problems involve a B substitute the set is here shown with such equipment and is to be compared with Figure 7 which shows battery equip- ment. impedance and transformer coupling. The following discussion will apply particularly to transformer-coupled sets but will in gen- eral be applicable to resistance and im- pedance coupling. It should be made perfectly clear that *Ferranti Electric Limited, Toronto, Ontario, Canada. neither the B eliminator nor the set alone can be blamed for motorboating. If cer- tain relations between the circuit constants exist, motorboating will result and it will not stop until these relations are changed. No one expects anything but a squeal from a regenerative set when the coupling + — FIGURE 2. AN AMPLIFIER SYSTEM OF THREE STAGES WITH VERY SMALL TENDENCY TOWARD MOTORBOATING is made too tight. Motorboating in a set using a B eliminator is as normal a con- dition as squealing in a regenerative set. If the conditions are correct for it to motor- boat, the set will do so and nothing can stop it until the conditions are changed. Consider the connection in Figure 1. Z. Ze and Zs, are the equivalent primary impedances of the audio transformers in- cluding the plate impedances of the tubes. An alternating voltage impressed between points 1 and 2 is amplified by the tubes and transformers and is then impressed on the grid of the last tube. This voltage will cause an alternating current to flow in the plate circuit of the last tube. This current will flow in the path a-b-c-d-e-t-g-h. This alternating current flowing through the resistances c-d and b-d will cause an alternating voltage to be impressed back on the plate circuits c-d-e-k (tube 1) and b-d-e-] (tube no. 2). The alternating volt- ages Vie and Vea will depend on the cur- rents and the impedances between the points e-d and b-d. This small voltage is again amplified and fed back and if the phase angle of the fed back voltage Via and Vea is such that the original signal is increased by the feed back the alternating voltage will keep on increasing until the set breaks into oscillation and gives the characteristic motorboat sound. The frequency of this oscillation will generally be low because of the large inductances in the plate circuits.

Page 20

Ost t ways of reducing the motor- change the phase angles of Vie and V.«a. In transformer- the shift in the phase angle y reversing the primary or ads of one of the audio trans- three-stage resistance-coupled ase shift can only be obtained x to a combination of resistance ce coupling. One of the best to use is to make the first istance-impedance, of next re- stance and for the last stage pedance, as shown in Fig. 8. discussion the effect of the and the eondenser C. were or -we ae . Brsne Loe SEPARATE BYPASS CONDENSERS ECREASE LOSSES IN THE VOLTAGE RESISTANCES AND ALSO TO DE- HE TENDENCY TOWARD MOTOR- BOATING Che choke L, has usually a very ance to audio frequencies and ely block the alternating volt- e rest of the filter system. The acts as a by-pass and in addi- inction as part of the filter by me of the alternating current the resistance a-b-c-d reduces *k voltage. istances of the output system y the direct current voltage and iirements of the set, it is not make any great changes in this set. In order to keep the alter- age drop across these resistances ll be necessary to reduce the etween these points. This can t conveniently with condensers. the effect of the small leakage impedance of a condenser is ohms; f being the frequency per second and C the capacity As an example; a 1-ufd. con- an impedance of 6360 ohms at ind an impedance of 2550 ohms The condensers will be con- as shown in Fig. 3. to reduce effectively the im- tween the points c and d the im- f condenser C, in ohms should be \% of the resistance between c n some cases it may be necessary the impedance of condenser C, NOVEMBER, 1927 as small an 1/10 of the resistance between ce and d but this is an extreme case and it will usually be cheaper to adopt some method of shifting the phase angles by reversing the polarity of the transformer. The impedance of the condensers should be calculated at 25 cycles and the above ratio will hold for all taps. 25 cycles is chosen as the basis for calculation because it is assumed to be the lowest note to be transmitted. Another way to reduce the feed back is to use a number of separate resistances, one for each tap. The connection is shown in Fig. 4. In this way the feedback may be reduced and the motorboating stopped. It will usually be necessary to add some by- pass condensers. If the motorboating is very bad it may even be necessary to use iron core chokes in the B+ tap leads in order to keep the alternating current out of the resistances. The proper connection is given in Fig. 5. The inductance of the choke should be at- er than 10 henrys and the resistance should preferably be low. Usually only the de- tector lead will require the choke but oc- casionally every tap lead will require it. A little experimenting will soon show what is required to eliminate the trouble. On further analyzing of the output cir- cuits, mathematically it was found that the conditions for motorboating also depend on the amplification factors of the tubes. likewise the turn ratios, polarities and ef- ficiencies of the transformers. The rela- tions between these quantities and the plate and output impedances is very complicated and it requires a lot of laborious work be- fore any definite results can be obtained for a particular set of conditions. ; " = FIGURE 4. RESISTANCES MAY BE USED FOR PUT PANEL IN EXTREME CASES SEPARATE EACH OUT- These may have bypass condensers as indicated by the dotted line. The results are approximately as fol- lows: The greater the amplification factor of the tube and the greater the turn ratio of the transformer, the smaller must the output impedance be in order to eliminate motorboating. The polarity of the trans- former refers to the relative direction of the windings in the primary and secondary coils. It was found that in some cases. the easiest way to stop the motorboating

Page 21

NOVEMBER, 1927 was to change the polarity by reversing the secondary leads of one or both of the audio transformers. This is due to the shifting of the phase angle of the voltages Via and Vea. This is usually the best method of reducing motorboating and it should be tried before the changes shown in Figs. {and 5 are made. There is only one thing to watch when this change is made. Un- less the output impedances are small when we reverse the leads, the amplification at some frequencies will be reduced and dis- tortion will result. This can be made negligible if the output resistances are properly by-passed. Two yufds. on each tap will generally be sufficient. The more efficient the transformer the more likely the set is to motorboat but with proper care in the by-passing of the output resist- ances motorboating can be eliminated. As a general rule it will require less total capacity to eliminate motorboating if each tap is by-passed. For example, in one B eliminator 2 ufds. across the 22%, 90 and 180-V. taps stopped the motorboat- ing. It required, however, 8 yufds. across the 90-V. tap and 3 ufds. across the 180-V. tap to stop the motorboating when the 22%-V. top was not by-passed. These 11 ufds. were required to give the same results as 6 ufds. Fig. 6 shows the connections. The Papacy ve of motorboating is too com- plicated to lay down any hard and fast rules but usually a little experimenting along the above lines will soon show what AAA WY " td Lf * AAAAAAAMAA, a- FIGURE 5 WHEN OTHER REMEDIES FAIL MOTORBOATING MAY SOMETIMES BE STOPPED BY IRON CORE INDUCTANCES IN THE OUTPUT LEADS OF THE B SUPPLY The bypass condensers must naturally be on the set side of these coils. must be done to eliminate the trouble. If the output resistances of the B eliminator could be eliminated entirely there would be no feed back ‘and therefore no danger of motorboating. This being impossible it naturally follows that the set and the B eliminator must be adapted to each other and the constants of the output system of the B eliminator and of the set adjusted to reduce the feed back which is respon- sible for the motorboating. The term “output impedance” is used in this article when referring to the output system of the B eliminator. Ost HOWLING Whistling or howling is generally caused by feed back in the B batteries and in the wiring of the audio frequency end of the set. (It is assumed that, if more than one stage of radio frequency amplification is used, the set is properly neutralized in these stages.) Examine the connections in Fig. 7 and compare them with the connections of Fig. 1. If the batteries are replaced by their resistances and the filter system is neglected the two connections are the same. If the resistance of the batteries is such that the feed back is great enough and of the proper phase, howling will result. The J W bt * /nput from rec- tifter and fi/té: laput trom rec- ther end tiller A j A FIGURE 6. COMPARISON OF DIFFERENT BYPASS METHODS In the circuits shown just enough capacity was used at each point te stop motorboating in a particular set. Figure 6B requires a total of 11 microfarads while the same purpose is accomplished in Figure 6B with a total of 6 microfarads. In general it is best te bypass all taps. way, then, to stop the howling is to reduce the resistance in the B batteries or to change the phase angle of the feed back by re- versing the polarity of one or both of the audio transformers. The impedance of the B batteries can be reduced by connecting a one or two-ufd. condenser from each B+ lead to B minus. If howling develops after the set has been in operation for some time, it will generally be found that the B batteries have run down and the resistance per cell has increased to such a value that the feed back is enough to cause howling. Due to the high capacity and the low resistance of the storage B batteries howl- ing due to feed back in such batteries is not very common. The following results taken from a test on two stages of audio amplification may be of interest. The con- nections were made as per Fig. 8. The B blocks consisted of Exide storage batteries Type W.H. A resistance R and an in- ductance L were connected in series with the 24-V. block. The resistances of the batteries were assumed to be zero. The data in regard to the tubes and transform- ers were as follows: Tube No. 1, UX-201-A A= 5 B= = 2% C= 0 a = 75 Ee 22400 ohms

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OST NOVEMBER, 1927 UX-201-A to give an oscillation with reversed polarity. E B 96 C = 4% Theoretically if the self and mutual capa- 8.25 R, 9000 ohms cities of the coils are neglected there should ; be no howling with reversed polarity. Ap- ‘ 3% 2 parently these capacities in this case gave .1 Ferranti, AE3, T ratio a shift in phase sufficient to cause oscilla- 3% 2 Ferranti, AF3, —- ratio 1 and C. were of 2 ufds. capacity ity is marked by the arrows ndary of Transformer No. 1 when opposite polarity was mM connection is equivalent to 2 audio amplification with a ha a itput transformer and it was watet-oomg|at0|e0|t 4 FIGURE & TkES:iS CIRCUIIS TO SHOW THE a 7 EFFECT OF BATTERY RESISTANCE IN AGGRA- —_ VATING A TENDENCY TO HOWL OO ) : The resistance power was increased until the set -Y = broke into a howl. Figures given in the text herewith iE ro show that the amount of resistance necessary to create wr z a how! varied considerably depending upon the trans- — former polarity and the size of Cl and C2. a> of - ane o+ ewe Valet} lata} efapapal tion. In resistance coupled sets the phase shift of the feed back voltage is obtained TYPICAL DETECTOR TWO-STEP by using the resistance impedance combina- Mi Mh REGARD TO gaan in the section on motor- op 5 6 eee © If the wiring in the audio frequency end the calculated conditions for of the set is not done properly howling may results of the tests with the result due to the magnetic and electro-static ial to zero are tabulated be- coupling between the plate and grid wires. This can be eliminated occasionally by con- necting a one or two ufd. condenser in the rity Con- Cen- positions marked x, y and z in Fig 9. The rmer denser denser Oscil- result will depend on the relative values C C. lation of the impedance of the B battery circuits 0 0 No 0 0 Yes 2 0 Yes 0 2 Yes 2 2 Yes 0 0 No 0 0 No 0 0 Yes +] , 2 0 No 8 Seicer GF ane B+ pwR iy! } —— | 0 9 No ala jajalelal jajujalald|ejayejety 2 0 No FIGURE 9% TYPICAL DETECTOR TWO-STEP 0 9 No RECEIVER FOR ANALYSIS WITH REGARD TO _ . PREVENTION OF HOWLING BY USE OF BYPASS : ‘ CONDENSERS ation occurred the resistance Compare this with Figure 6. that which would just cause begin. For higher valves the | until such a high resistance and the condensers. If wet Bs are used as to reduce the plate voltage the condensers will have very little effect » greatly. and it may be necessary to rewire the set of reversed polarity the oscil- In wiring or rewiring a set the following ry weak and of a very high points must be kept in mind. Make th: Similar results were obtained grid and plate wires as short as possibl values of inductance and re- and keep them as far apart as possible If it is necessary to bring a plate wire nea! noted in the above results a-,grid wire, run the two wires at right large resistance was required angles to each other. If at all possille, do

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NOVEMBER, 1927 OST not run a grid wire parallel to a plate wire. Start with the radio frequency input at one end of the set and work straight through to the output jack at the other end. If the set is to be used in one room and the B batteries in another, connect a two pfd. condenser across each tap as in Fig. 9. This will help to reduce the magnetic coupling in the long plate wires by by-passing some of the signal current. If it is not possible to connect the condenser in the set itself, connect them across the terminals of the set. If the condensers are connected across the battery terminals in the other room it will reduce the feed back through the batteries but it will not reduce the magnetic coupling in the long lead wires. Occasionally a set will howl with one make of transformers and not howl with another make. This may be due to the different polarity of the transformers; or to the impedance of one set of transform- ers changing the phase angle of the feed back voltage enough to stop the howling. If the impedance of one transformer is very much lower than the other the set may be oscillating at a frequency that is above the audible range. In this case there will be no audible note but the quality of the reception will not be good. As a general rule, it is rather difficult to tell by examination what wire or wires are responsible for the feed back. A little care in laying out the wiring along the above lines will eliminate the danger of howling and is well worth the time spent in doing it. doing the same.” fundamentals every once in a while. and becoming lost. Representative Government By Hiram Percy Maxim, President, A.R.R.L. ASKED my father once why the Puritans left a perfectly comfortable country to come over to the New World with its savage Indians and hard life. His answer was, “In order that they might be able to worship God according to the dictates of their own conscience—and prevent others from I have thought about that many times in A.R.R.L. affairs. It gets one down to the fundamentals of government. It’s a good thing to get down to It keeps one from getting off the road Our A.R.R.L. government is strictly Representative. Every two years our Ol ce il I TO members in each of our fourteen divisions elect a man to represent them. These fourteen men are the directors of the A.R.R.L. What the majority of them vote to do is what the majority of the country thinks is best, and it is done. These men select a President, a Vice President, a Secretary, a Treasurer and a Communnications Manager. They allow the President to vote to break a tie and they allow the Vice President to vote. All the other officers are hired men and they have no vote. The directors may hire or fire them at will. In other words, the directors, representing the entire country, are the rulers of the A.R.R.L. It is typically American. The President may howl his head off for something. Unless he can con- vince a majority of the other fifteen directors that it is best for the A.R.R.L. as a whole, he is turned down. A director may argue and threaten for something that his Division wants. Unless he can convince a majority of the other fifteen directors that it is best for the A.R.R.L. as a whole, he and his Division get turned down. In other words, no man nor no local group of men can impose their will upon the whole. Nobody can “prevent others from doing the same.” That’s Representative Government. The history of human affairs has shown that it’s the kind of government that succeeds.

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E ost NOVEMBER, 1927 My Phone Isn’t Much, If Any, Broader Than C. W.” By Robert S. Kruse, Technical Editor the past four years that claim been on the increase—and the 1imers actually seem to be serious it, and to believe it. take the remark just as it is made, n't so, cannot hope to be so, and if king about amateur phones it isn’t a pair of Texas counties, which ame size as New England, reach for the asbestos paper and ik! In the first place we have Cw with key locked SOSKC M94m , « 000 Cyches ig HOWING HOW THE SIDE FREQUENCIES Ee BANDS CANNOT POSSIBLY ACCOUNT i= BROAD PHONE AND THE BROAD A.C. TELEGRAPH SIGNAL hat even the phene signal, the 30 times as the 60 cycle telegraph signal, is very sharp as te the “universal wave” signals we often which cover a large band on the tuner. k lining in the QST mailbox and econd place this particular letter mply burn itself up, for it hasn’t to attack but the truth, and the very hard to ruin permanently. with the stage all set for an argu- are going to drop the argument id reason. The whole reason for ng the argument was to make t what was to be talked about. WHAT IS C.W.? First of all—how many C.W. stations are there in the A.R.R.L.? Eight, isn’t it’ There were nine last week but Cushing is on a fishing trip and that makes it eight for the time being. What about the other thousands? All of them call themselves c.w. What are they? I don’t know what to call them. They use vacuum tube oscillators and they use telegraph keys and they turn out a signal that you must heterodyne or auto- dyne at the receiving end—but they are certainly not c.w. for that means “con- tinuous wave”, in fact it means a smooth continuous wave just as d.c. means a smooth continuous current. THE HARMLESS SIDE BANDS Let’s see how it is possible for the out- put of a vacuum tube to be something be- sides c.w. First, one may manufacture “side bands” and while this isn’t the thing that makes some phones very, very broad, it is worth mentioning. Looking at Figure 1 we have at A the “picture” of a c.w. carrier which means that the oscillator is operating on d.c. and that the key (if any) and the mi- crophone (if any) must not be working. We have set the carrier at 200 meters and for the sake of avoiding mussy figures we will say that is 1,500 Ke. If we put a.c. plate supply on the tube we will not have c.w. but will instead have, as shown at B, the 1,500 Ke. “carrier” with a “side fre- quency,” which we will call X, 60 cycles away from it on one side and another “side frequency” Y, 60 cycles away on the other side. With very careful tuning our auto- dyne receivers will just be able to make out that there are three waves. No—with most transmitters it will not be able to make out anything of the sort for the “wabbulation” will cover up the whole business. More of that later. Now if the owner of the station hap- pens to be rich and uses 500-cycle plate supply, the picture will change once more and becomes that of Fig. 1C. This wave is a little broader and if by any rare chance the station happens not to be wabbulated we can very easily tune into three suc- yy peaks of the signal. Try it on Finally, if we supply the oscillator with voice-modulated plate power we get a pic- ture like that of Fig. 1D. The “side fre- quencies” are now dancing about and have become a “sideband” on either side of the

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NOVEMBER, 1927 carrier. We will suppose that this par- ticular phone happens to have a good modu- lator system (most of them do not) and that it actually puts thru all the voice fre- quencies up to 3,000 cycles. Then we may expect some energy as far out as 3,000 cycles or 1/3 Ke. on each side of the 1,500 Ke. carrier. There will not be much energy that far out as the high pitches in the voice are weak but to give the phone as bad a name as possible we will say the side bands go out 1/3 Ke. as shown in Fig. 1D. What of it? We find that this excep- tionally broad phone is after all entirely contained within the region of 199.6 to 200.4 meters—there isn’t a sound outside that region. Even if we have the receiver os- cillating we will be able to get within 1 kiloeyele or so of those boundaries without getting a beat note with any “punch” to it. THEN WHAT DOES IT? Now you know perfectly well that not one phone in a hundred is as sharp as that —nor one telegraph station in a dozen. The sideband business utterly and entirely fails to explain the practical broadness of transmitters. For instance, we have 27 miles from us, broadcasting station WBZ which has lots of power and is therefore able to make one notice tuning effects. This station used to operate so that at Hartford one got the impression that a “universal wave” was being used. The broadness was simply incredible from the sideband standpoint. At the same time (this is the point) if the microphone was not being used the carrier wave was as sharp and steady as one could wish. At that time folks said—“That’s because they have so much power.” But it wasn’t. The station today uses more power than ever, and it is sharp. Again—it is possible when using 4a.c. plate supply to make two very simple shifts in the telegraph transmitter at 1OA which will cause it to be reasonably sharp at the receiving end—or to take in the whole neighborhood the working wave. Still again. any amateur with any ex- perience at all knows that there is a very great difference in the sharpness of sta- tions using 500-cycle plate supply, which means having the same sidebands. Quite certainly—the sidebands are not at fault. “WABBULATION” Very well—if 10A has the sidebands of Fig. 1B and can be either sharp or broad; NAA has the sidebands of 1C and is sharp but ean be made broad, and finally, WBZ’s announcer puts on the sidebands of 1D and used to be tremendously broad but now is Ost 23 sharp—then we simply must look to some- thing else besides the sidebands. This “something else” is our old friend “Wabbulation”—the shift in oscillator fre- quency when the plate voltage changes. For some reason or other this does not seem to impress either the telegraph or the phone fraternity, though it is often the thing that makes the difference between success and failure—between peace and war with the neighbors who would like to be able to listen to more than one station. Suppose we look at Fig..2. This is sup- posed to show what happens when the key is opened on a good oscillator and on a bad one. The good onc, A, simply dies on the spot—weakens gradually and stops. The exact scientist will take exception to that claim and prove that “transient sidebands” are formed. Very well—what of it? Or- dinary sidebands don’t cause anything like the broadness of the next effect we will touch on—so let the scientist have his transients. Meanwhole, look at Fig. 2B where we are opening the key on an ordinary run- of-mine amateur oscillator which is being asked to work on d.c. for the first time in its existence. You know what happens— but look at the picture just the same! The frequency takes a terriffic swoop—no mere 3 Ke., but far across the tuner—much further than merely out of hearing. Now suppose we used that sort of an os- cillator with 60-cycle supply at 10A. We would have the usual sidebands that we showed in Fig. 1B, but you would not be able to tune to three peaks, for both the carrier and the side frequencies would be diving around the tuned at the frantic rate of 120 times per second—in and out for each time the plate voltage went up and down. Perhavs Fie. 3 makes this clearer; at any rate it will show that such a sig- nal isn’t very effective. It is like the rifle and the shotgun. The shotgun may be good enough for a bum shot at close range but a little ways off the “scattergun” has no authority whatever. The rifle picks out one course and goes a long ways on that course. The shotgun attracts a lot more attention though! THE PRACTICAL TEST, AND A DEFINITION Further back I said that WBZ used to be broad at Hartford, and that now with more power it is not broad. The reason is a very definite one. These days the car- rier wave of WBZ is tied down by a master control and cannot wabble. It can sprout sidebands, but it must stay put. I do not know how the carrier is being steadied just now (both crystals and tuning forks have heen used at different times) but I do know that the change in the tuning of the sta-

Page 26

OST NOVEMBER, 1927 mmediate and startling when | was installed. at this point and drop the we have begun to get mixed tal-controlled broadcast sta- | drop both soon enough and amateur stations—without re leaving the crystal-con- BAD OSCILLATOR -B Thus oscillator will work a3 Shou /7 @ fig 3 obee an Telegraph Ore F THE BROADNESS COMES IN tuning fork controlled) WBZ ortant point that modulation t broad to anything like the “wabbulation”. The broad- nly due to side bands alone shifting of the carrier-wave the plate voltage changed. he microphone was idle, the was steady—therefore the still and tuned sharply. As nicrophone went to work the began to dodge up and down began to jump around—and come in over a much wider tuner. in the least matter if I am guess that WBZ happened to ng the plate voltage of the os- in those days. It probably same thing would have hap- ome extent with an ordinary the modulation had not been scillator at all but on one of because an unsteady oscil- ft if one leaves the plate volt- nd merely shifts the load—and hifting the oscillator load is to plifier plate voltage. By this time it isn’t necessary—but we may as well put down our definition and say that, “wabbulation is the variation of frequency which takes place in an unstable oscillator when the plate voltage is shifted by microphone modulation or by the use of a plate supply that is anything but d.c.” THE PURE AND HOLY D.C.C.W. All this time the d.c. telegrapher is quite likely to be feeling very pious because /: isn’t doing anything of this sort. In a way that is true; there isn’t anything like a real d.c. plate supply to show up a punk oscillator. The sort of foolishness that is cartooned in Fig. 2B can’t possibly be over- looked when one is using d.c. supply and therefore the owner of the station struggles with the thing and finally gets the fre- quency soldered down. Then his signa! starts to attract attention and he credits the d.c. supply with the results. My own notion is that the d.c. was useful mainly to make him steady the oscillator and that once it is steady the thing will be just as effective with “rectified and somewhat fil- tered” supply, which the operator on the other end will prefer to copy. RADIOPHONE DEPENDS ON C.W. For radiophone, the supply must be pure d.c. if it is to be any kind of a phone at all. Listen to some of the cheaper broadcasting stations and watch the way the generator hum chews the announcer’s voice. It isn’t hard for the operator to determine when he has a “pure d.c. note’—but how many times does he check up this wabbulation matter? Unless it is also a c.w. telegraph station it is a safe bet that he never does. That is why, in my estimation, no phone should be operated until it has been shown that the oscillator will stand up under the test of being keyed for telegraphy. If it does, then it is steady, and if 100% varia- tion in plate voltage by the key will not cause “wabbulation” it is a fair bet that 50% variation by the microphone and the modulator tube will not cause “wabbula- tion” either—and then we can hope for a radiophone that is really not much broader than c.w. DECENT TELEGRAPHY ALSO DEPENDS ON C.W At the same time—if the telegraph set will not stand the test of a d.c. plate supply (no matter what is ordinarily used) then it too is wasting power and creating in- terference. Try it on your set. Put th: set on reduced power if necessary but feed it whatever d.c. voltage may be available and try keying the thing. Better not cal! anyone but disconnect the antenna and listen with a receiver in the room. After listening to the wild shrieks and whoops you will be glad that the antenna is off.

Page 27

NOVEMBER, 1927 After that is cured—after you are able to make a c.w. signal, then there’s time enough to decide what sort of plate supply is to be used. No matter what it is, the set will now be more effective. AS TO CRYSTALS Unfortunately the crystal-controlled transmitter is not as cheap or simple as we might wish. At the same time, the com- parisons usually made are neither fair nor quite sensible. A crystal-controlled UX- ! y : Rittit hn Telephony Se) oe, Ses The st sgnal, that “hes @ rich © FIGURE 3 210 feeding the antenna is quite as likely to make a good signal at the far end as is a wabbly 50- or 75-watt oscillator whose plate supply has been roughened up to cover the wild wailings that d.c. would dis- close. In the same way, an 852 oscillator built with steadiness as the main objective will probably put less into the antenna—but more of it will get to the receiving headset. Figure 3 attempts to show this. If we tune in the signal at the left, all of the energy will be within hearing, but we cannot hope to accumulate all the energy that is spread around over that shoebrush effect—and most of it is wasted. Look at it this way— if we shoot a rifle at a rabbit 150 yards away we will either miss that rabbit or else stop him, but witha shotgun we will not do any more than burn the rabbit’s skin. Nearby the shotgun will be much more likely to hit the rabbit—also the neighbor’s pet collie, the family pig and the old gray mare—and all of them will kick up a rumpus. While the complete stability that can be gotten with crystal-control gives us the greatest possible effectiveness, we may find it desirable to approximate the thing in an- other way, and use a little extra power (and make a little extra local QRM) to make up the difference. THE OTHER POSSIBLE WAYS The other ways of steadying an oscillator have been referred to and are today about The “wabb lated” signal that Goesrt get out” but makes an awhs/ mess nearby re —— 77? Thousand Cycles ane Ost 25 the livest problems in amateur radio. in general one can think them out this way: The unsteadiness of an oscillator is occasioned by the capacity feedbacks in the tube and the fact that they vary with plate voltage and filament voltage. If we can shunt those capacities with large external capacities we may be able to swamp out the effect. In addition to this our tuned circuits must be so arranged as to be very determined in their frequency. This in general also calls for large capacity. Thus the best circuits will be those that have plenty of external capacity directly across the most trouble- some tube capacities and have those external capacities built into tuned circuits with very low re- sistance and small inductance, In practice this calls for Colpitts, Armstrong, Ultraudion or Hart- ley circuits with good big con- densers and good coils. If one is aiming at phone it might be a good idea to start out with the thought of working at 175 meters and to use a capacity of at least 500 uufds. If one is aiming at c.w. in the same band the ca- pacity will naturally be the same and in the lower bands propor- tionately as much—or more capacity. It does not hurt to have a capacity of 300 pufds. on a 40-meter set. Of course capacity isn’t all there is to it —but it is a good starter and the rest is mainly a matter of adjustment. Some of the adjustments that are of im- portance are suggested by H. P. Westman, \Y +++ Baw Waerae Resoor. ~ : \ g . . ‘a? 4 » « The rifle hits one thing a long ways off—the shot- gun hits a let of things nearby. (we edit each other’s writing) as follows. Do not overload the tubes as this will cause alternate heating and cooling which ma- terially changes the internal capacities and in that way causes wabbulation. In general, a high-resistance grid leak will help to steady the wave, partly by limiting the input so that at the maximum output adjustment the tube is still running cool. Too much grid feedback is a thing especial- ly to be avoided as even a high grid bias is not able to hold down the input—or steady the frequency—if the grid is too closely coupled to the plate.

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OST NOVEMBER, 1927 The Long Way ’Round By G. C. article, “How far is it?” which ap- in the April, QST there was a r’s error, the figures 410 and 730 ead of 41° and 73° respectively. ppose that anybody was confused had some correspondence and ission about this article, from appears that I did not make some ear enough. For example, the tance of both stations must be m the same pole, but it does not which. Thus, if A be in North lati- B in South, you may work on the in which case A’s polar distance 0 minus his latitude and B’s 0 titude; or you may work on the and A will be plus and B minus. t will be the same. juestion was, “How do you cal- long way around?” The easiest calculate the short way by the given, and before converting the listance c. into miles subtract it and convert the distance 360—c. this arose the question of which signals go. Since the direct route wo points is a straight line on the if both points are on the equator same meridian, it is just as im- tell the course by inspection of as to measure the distance, and le to claim a “long way ’round’ when the signals have really y short way. For example, 1 amateur near New York, say | 70° W, worked just after sunset nter with one in Japan, say 40° N Ee he might claim that as there ght between them over the west- rse of 150°, his signals had gone 10°. But in fact his signals gone North very near the pole larkness all the way, and quite way at that. So to show readers w to find the course of their own ind so avoid a similar error, I will this particular problem. find the distance by the formula This works out at 6586 miles; the being 95° 23’. Now look at the Fig. 1 represents the spherical s it is. A and B are the angles wo stations, C that at the pole; are the two polar distances, and ect line between A and B, whose have just caleulated. Now to ‘ourse of the line ¢ on the map Mayo 412, Concordia, Argentina. Knight* we must find the values of the angles A and B. The same formula turned inside out will do it, thus:— cos. a — cos. b cos.c Cos. A = Sin. b Sin. c cos. b — cos. a cos. € Cos. B sin.a sin.c From this we get in the case we ar working out A and B, both 24° 30’. (The; will not always be equal.) Now look at Fig. 2. This represents the same triangle, not as it is but as it would appear on the map. The lines CA and CB are meridians, straight down from the pole. Now if you mark off at A a straight line making an angle of 24° 30’ with AC and at B one mak ing the same angle with BC, you can draw by the eye a curve something like a para bola running into these two lines, and for Cc FIGURE 1 ordinary purposes this will be near enoug! to the true course of your signals. But to calculate the nearest approach to the pole marked D will help and fortunately this is easy. Calling the line CD in eithe: re 4 the formula is: sin.4 =sin.A sin.) which in the case under consideration make & = 17° 59’ or say 18°. As in mid-winte: the polar darkness extends 23° down from the pole it will be seen that as already stated these signals would have gone through darkness all the way. The exact eg of the point D has not been found ut only its distance from the pole, but still that will help in sketching in the curve. Further elaboration of this problem wil! probably not be of general interest, but i! any member of the A.R.R.L. is sufficient): interested to write to me I will show him

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NOVEMBER, 1927 how to calculate the whole course of the curve. However, it is not always necessary to calculate the course of your signals in order to be pretty sure of the way they have gone. If two stations are both in the dark FIGURE 2 or in the twilight, the short line between them is all in the dark, no matter how it looks, on the map, and you may be sure the signals go that way. If both are in the light, the short way is all in the light. The long way may be mostly dark, but it contains two bands of twilight, and I should think it doubtful if signals go that way. The only case in which any cal- culation of the course is necessary is when one is in the light and one in the dark. In this case either way around includes some daylight and a band of twilight, and if ever the signals go the long way round it would probably be in a case of that sort. . Strays *) - Extry! Static completely overcome— amateurs allowed all wavelengths—1 Kw. tubes for ten cents! We know all these oe must be true, for Don Mix is mar- ried! Don, “the sleepless wonder of 1TS”, the first operator of WNP, and more lately with the radio laboratory of the C. F. Bur- gess Laboratories at Madison (9EK-9XH and 4DM in Florida), was married on Sep- tember 3d to Miss Josephine A. Schaub, who up to about-that date was a stenog- rapher with the Burgess Battery Co. They reside at Madison. The QST Staff joins Mix’s many other — in congratulations and the best of wishes. By bending the tongue of a Fahnstock clip out, a temporary clip for round wire helices may be had.—5ACV =1- hy 27 Fixed Transmitting Condensers HE Sangamo Electric Company are now making a series of condensers having much higher resistance to a voltage break-down than the standard receiving con- densers. These are known as “Navy” type condensers and have the same physical di- mensions as the better known units. They come in three ratings according to the test voltages which they must with- stand. One type will withstand a 5,000- volt d.c. flash test and is made in the usual standard sizes up to and including .002ufds. A second type must hold up under a 3500- volt d.c. test for one minute. These may be had up to and including capacities of 0O05ufds. The third receives a 1500-volt d.c. test for one minute and these are ob- tainable up to and including .0lufds. ca- pacity. The amount of current a condenser will carry without undue heating depends, among other things, upon its capacity and the frequency. All of these types will earry the following currents with a temper- ature rise of less than 10 degrees centi- grade above room temperature at a fre- quency of 6,000 kes. (49.9 meters). .0002 to .00059 yfds. will carry 3 amperes. .0006 to .00099 ufds. will carry 4 amperes. .001 ufds. and larger will carry 5 amperes. The measured capacity will be within 10% of the rated value and after being held at a temperature of 65 degrees centigrade for two hours and then cooled, the capacity will be within 2% of the original value. When condensers are to be used for plate blocking, they should have a rated break- down voltage of over twice the working plate voltage. This is necessary because it is quite possible when using a rectifier for obtaining this high voltage to have the voltage across the transformer and rectifier rise considerably when the load is removed (key opened). It may jump to twice the normal voltage obtained when under load. It is also possible that the radio fre- quency voltages present in the oscillating circuit may at times be double the plate voltage when the key is down and the cir- cuit working normally. Therefore, for an ample factor of safety, pick a plate block- ing condenser having a voltage rating of at least 2% to 3 times the normal plate volt- age applied to the tube with key depressed. The grid condenser should be capable of withstanding at least twice the plate volt- age. —AH. P. W.

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Ost NOVEMBER, 1927 Rotten Broadcasting Not by The Old Man ; station Blah-Blue-Blah. Our ial Wednesday night program it to be played by Mr. Mac. A. whom everybody knows. Mac give his version of ‘Poppa’s Hot Daddy’ in a collodion solo. nows the difficulties of master- lion but Mac’s done it. Lawse incing.” nting a generous generator, ind flopped feebly. Then the tone of the collodion broke is the sort of thing that makes resistance-amplifiers and cone rs (advt.) only to discover that ‘'t any low notes except the hum anyhow. One expert sug- the trouble is that one can’t stance, but they put him in a Noise finished and they called He agreed to a return bout— is supposed to be a concert. ack at the mike. you all liked Mac, for he’s a this station. To accede to the equests that have come in, his er will be ‘Pilvor Treads Get This is dedicated to Jasper esident of the Pilvor Tire, Rub- topper Co., of Tobleedem, Ohio. play his faithful collodion and will accompany him on the » draw; Miss Anjul was bare- se present. I'll admit she put stiff fight but Mac led by some ynger than a nose—maybe his her behind than a protein chas- tron the harp plunked desperate- arely getting its last plunk in ah broke in again. !" he objected, “we had counted ighing Lizards Symphonic En- ght and at this moment; but are not here they must be late. erous audience” (here the fel- got up and left so that I had whole thing alone) “of station Blah will not mind a slight rder we will now answer the This will be done by our sta- Engineer, Mr. Ike N. Trigh.” ening. folks. The first question nan who asks that his real name tioned. He says, ‘I want a hook- rystal set to fit a cocoanut shell y cents.” We are very glad of tunity to serve a listener. An coanut—er, no, I mean a dia- sent for 50 cents which is less than the cost of printing. That concludes our questions. “My technical talk for this evening is ‘Shall I Use a Crystal or a Detector?’ This is a very important subject. A _ hurried thought might cause us to declare that there is no difference. More careful obser- vation of the engineering aspects brings different conclusions. We have to adjust the catwhisker on the crystal, it is exposed to the dust and inexpert determination of the sensitive point on the catwhisker wil! cause a heavy decrease in sensitivity. The OMPAH IS BACK AT THE MIKE detector on the contrary is a neat little cartridge, is not exposed to the air and the sensitive point is found in a highly equipped laboratory by expert lavatorians. It was received in excellent packing and—I beg your pardon—I mean that there is no com- parison and the detector is much to be pre- ferred. This will no doubt remove con- fusion from the minds of our large nightly audience.” Just then a whistle started and I mut- tered, “Well there’re two of us now.” Ompah was mumbling on. “....and since the efforts of Mr. Trigh are so greatly ap- preciated we will have another of his en- lightening talks on Wednesday at the same hour. Now at this time we will hear the Etube from Litzendraght, the famous com- position of Lemin Sherbit. The Etube tells in music the story of a blushing pink sun- set that accentuates to a deep and fiery red across which rushes a black and menacing cloud which settles the sunset as far as we are concerned. The Etube will be rendered by the Laughing Lizards who have finally appeared. Their Symphonic Ensemble is well known to our large audience.” “‘*Symphonic Ensemble!’ Every little jazz band with a one-lung violin and a 7- gallon bass drum thinks it is a ‘Symphonic Ensemble.’ Oh well, what matter? The 5-dollar loud-speakers will never notice the difference.” The Ensemble started—on the left foot The trombone mistook the carburetor for

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NOVEMBER, 1927 the starter and pulled out the choke. He did something to E flat that was positively mmodest, so I nonchalantly struck a match, showing that there’s a bit of cruelty in the est of us. From curiosity I stayed, nor was I dis- appointed. The only man that wasn’t note- worthily false was the bass-drummer; but | GOT UP AND WENT FOR A DRINK OF WATER he made up for that by producing strictly fresh samples of time—bed-time, dinner- time, breakfast-time, all sorts of plain and fancy time—but certainly not the correct time. It was an immoral exhibition and just as they were finishing, the cabriolet chased a half-note out from behind a clef and up a couple of staffs into the corner of the last measure. What it did there I will not hazard but the thin shriek that came out froze my blood and brought tears of sympathy to my eyes. “IT know you have enjoyed the excellent rendition of the Etube from Litzendraght by the Laughing Lizards Symphonic En- semble who will next play ‘I Dowanna Low Ohm’.” I got up and went for a drink of water. Nevertheless I still felt dirty—and inde- cent—after that Etube. I renewed my be- ief in capital punishment. Murder’s a medicine that should be tasted by its dis- penser—and too bad that he can’t be made to take it first. When I got back the jazz was whining its last, making two cruelties by that gang in the same evening. In view of these things why do people talk about the crime record of Milwaukee—or is it Chicago? No matter—it is some place ’way off in the West. “The next number on our program is tha—....Eh?....What? Migosh! Folks, something very serious has happened. Ac- cidentally some of our wires have got tangled. The cabriolet player of the Laughing Lizards has just been accidental- ly electrocuted. Two thousand ohms just flashed—...Eh?...What?...Wait a little, folks, until I get this straight—Two thou- sand five-hundred - Ost 29 I pulled the switch. That is one of the real beauties of radio—a little click and you have silence, in small or large amounts, or by the gross. Right now I yearned for a gross. Mounts for 250-Watters E are showing in the accompanying illustration a pair of mountings for the 204 and 204-A tubes. The bases are of machined bakelite and the plate one is somewhat thicker than the grid one to take care of the difference in the width of the tube prongs. The plate clip has a pair of lugs bent in toward the center to prevent the tube from being forced too far back. The grid clips are solid in construction and support most of the weight of that end of the tube which should insure good con- tact. The filament contacts are made of lighter material and have plenty of spring to them. They should, therefore, be able to take care of any irregularities in the filament contact pin’s position . All the various clips and springs are held in place by two machine screws, one of which extends far enough from the base to act as the terminal. They are deeply countersunk so as not to touch the ma- terial to which the base is fastened. The mounts may be fastened down by screws passing through two holes drilled for that purpose. As you have probably noted from the trademark, they are manufactured by the Radio Engineering Laboratories of Long Island City, N. Y. —H. P. W.

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oOsT NOVEMBER, 1927 QSLL By Harold P. Westman, Assistant Technical Editor of the QSL cards in circula- today are of the same type nsisting chiefly of the station l etters printed in red or ng up most of the available space The report on the other fel- and a description of the trans- ation are spattered around the t as background to the call let- deg ree to which they vary is s mostly in the type of lettering beir a li 1g set in a box or in some near arrangement. tation owners are also amateur hers who are used to doing their a ing. prin They are therefore in a t their own cards after they | \ VIEW OF THE STATION ack of t he card, (that portion reserved for ence) there appears a printed form te be ving the repert on the e iitable negative. This negative der part of the job and some sug- n its wing trove draw ; wa Why ll, a make-up will not be amiss. has been submitted by Mr. of nu7SM. a sketch and do whatever nted on a piece of drawing wrapping paper will not do graduate engineer may be plain.) After that, procure a racing cloth and fasten it t securely lrawi use This ti why ng. To follow engineering thumb tacks on a drawing me, the head cook will have the bread board will not do. border, sketch and lettering on r linen with India ink. the sketch is finished and dry, face up in a printing frame and, th photographic film, face down. ourse, room. will have to be done in Now, expose to an arti- ficial light. The correct time for a seventy- five watt bulb placed about ten feet from the frame, is approximately one-half second. Just about the time it takes to turn the light on and off as quickly as pos- sible. The length of the exposure is not at all critical and a good negative may be secured even though it be somewhat longer or shorter. “After the exposure, develop the film in the usual manner. If you have not the facilities for developing it yourself, wrap it in a light tight package and take it to the local photographer. Your cards may be printed from the negative thus secured. The expense will not be very great. 1 piece of tracing cloth 8” by 10” 1 (+7) 5” by 7” cut film Developing materials ‘ 1 gross double weight printing paper 1.50 Developing materials 25 Total $2.07 “It is suggested that if you have had no previous experience with this type of work, that a half-dozen or a dozen 5” by 7” cut films that are used in a Graflex camera be obtained. They are heavier and easier to handle than the ordinary roll film although the latter is somewhat less expensive. You will probably need more than one shot to get the negative you want.” On the matter of making cards bearing a photo of the station. these suggestions of Mr. J. M. Fox, nc3DG will be of consider- able help. “If you have a plate camera of post ecard size, the iob is a lead-pipe cinch. A sheet of drawing paper cut to suitable proportions is painted with whatever letter- ing you may fancy and hung up on the wall. The camera is loaded with a plate or cut film and masked with a piece of black paper at one end to allow a second ex- posure to make a picture of the trans- mitter. tower or what have vou? It is essential, of course, to mask the focusinz glass to the same size of the plate so that the image can be located correctly before making the exposure. “When the exposure is made, the plate holder is taken into the dark room and th- mask removed and replaced by another at the other side of the plate. This second mask must be equal in size to the part al- . ready exposed “If a post-card size camera is not avail able, the job can be done with a 3%” by 4%” size but it is not quite so simple. Cut

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NOVEMBER, 1927 film must be used, two pieces being trimmed to suitable sizes after development and joined together by passe partout strip stuck along the edges. “In photographing a set with shiny panels, it is best to use a large electric lamp for illumination as it can be placed in a position which does not show reflections and if the exposure is not right the first time, a second exposure can be made with- out any guess work due to changed lighting conditions. “If one has the patience, probably the best way to get a real contrast for black lettering would be to mount black cut-out letters on a white sheet and illuminate from behind, thus making a silhouette.” This type of card showing a view of the station is interesting to the other fellow who, after hearing your signal, would probably like to see what equipment you are using. It is much more desirable than the very common stereotyped phrasing concern- ing power, circuit arrangement and antenna dimensions which adorns most cards. We have heard those remarks so often that they hardly register as anything at all in- teresting or important but are viewed most- ly as so much background to the report on our own signals. They are like last year’s popular dance number, well worn out! Another type of card carries in addition to the report, a picture, sketch or design of some sort to break the “all print” appear- ance of the card. One version of this is shown in an illustration. That portion of it devoted to the sketch can be used for many purposes. It can show a snap of the station, the mast, some neighboring land- mark or anything else that may be fitting. Of the many humorous cards that one sees, some have a perfectly good reason for existence although a large number are only mediocre. The average chap, unless he really knows how to draw, had better leave the make-up of this type of card to some- one who knows how to do it. If yours is a traffic handling station, you may use a map of the surrounding state or, if in a big city, of the surrounding sec- tions showing the exact location of your station. This may be of help to the sta- tions with which you keep schedules. If you are fond of DX message handling you can expand the idea somewhat and show the location of your station in respect to the rest of the world. There can always be some artistic de- sign worked into a card. The amount of design may vary considerably from begin- ning just a border or to the point where it takes up most of the room. Both ex- tremes are interesting if well done. If you are not sure of your artistic ability it would probably be better to lean more toward the simplest of designs. Ost 31 Just what constitutes the necessities in a report, is opened to question. To start with, there should appear, the call letters of the station to which the card is sent and the date and time on which communication was established. It would be advisable to abbreviate the name of the month which can be followed by the day and year rather than writing the whole as a series of numerals. For instance, 8/1/27 will mean August first of 1927 to an inhabitant of these United States whereas our Australian friends would call that January eighth, 1927. Of course, we understand this when the card is received but we may not be so sure of it a year later. Better be safe. There seems little doubt but that the two most important reports are on the audibility and character of the note. Other reports are rarely given during the con- tact and mention of such things as QRM, QRN, QSS, etcetera may well be relegated to that line devoted to “remarks”. In- cidently, why does that line have to be labelled? One will read any written matter that appears on the card and the space taken up by the “label” is valuable. The most important reason why a re- port on the wave is not given is because the average receiver is not calibrated and it is a nuisance to have to drag out the wavemeter for each signal. After all, if the station is within the band, it is not so ARRIL-LeonC Grove-RCC ~ 8516 15th NE, Seattle. ANOTHER IDEA This card is distinctive and has a touch of scenery te brighten up one’s mail. important to give his exact wavelength. If, however, he is outside the band, this should be pointed out to him. It is not very difficult to remember or mark on the dial, the limits of the band. Needless and lengthy descriptions of your antenna system are not of prime interest to the other chap. Anyway, it will most likely be changed in a short time to try something different. Why not omit such details along with the type of receiver, audio amplifier, transmitting tube, rectifier, filter, antenna current, ad infinitum. If you must have a lot of printing these things may be included but its dollars to dough-

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Ost the “junk” would be more » you send a card to a sta- hear? That’s a sport that gone out of style but which, is left its mark on the card. the card read that the sta- worked and save a stroke of itching out the “heard” por- e thing applies to the c.w. signations. A mighty large the stations on the air are es and they usually confine to the working of other tations. Leave off the and save another stroke of uurse, if you are operating you will probably confine working other phone sta- these conditions, it would be ng on to it. g is but a number of sug- are many other ideas arried out. The use of a the country instead of the ediate helps make the card ng. The A.R.R.L. diamond rlooked, either. a good idea, before spend- for cards, to see your local mmerce. You may be able that these cards offer an tunity of spreading the ir city all over the country Quite a few of them have f this already. Such cards vs of the city, its slogan, its agricultural or other pos- ficial seal or many other ts about it. Its good adver- wn and cheap cards for you. there Strays gs the plate milliammeter in reuit, be sure it is inserted idio frequency choke and the nd not between the choke and t’s put next to the plate, it to the radio frequency cur- in the tube and will prob- ed or even completely burned iggestion is for those who positive plate voltage lead. a simple oscillator arrange- erentiate from oscillator-am- ) is used, the meter may be egative high voltage lead and to ground potential. This is particularly if one happens en the juice is on. Yr ca NOVEMBER, 1927 An Automatic Sender MACHINE for automatic code trans- mission, which apparently overcomes most of the shortcomings of other de- vices for the purpose, has been put out by the Teleplex Company of New York City. Its two principal virtues are its use of rec- ords which are too long to memorize and its ability to transmit at varying speeds with- out distortion of characters. The records are in the form of perforated tapes which are cut on.a machine which is controlled by hand sending. They are cut at various speeds and, while they may be run at any speed desired, they are beautifully like the sending of a good operator when run fairly close to the speed at which they were cut The result is that at all speeds the spacing and grouping are correct. The tape is used first in one direction and then reversed- two rows of perforations appearing on each tape. There are about 225 words on the tape in each direction making a total of 450 words per roll. Several rolls, cut at various speeds, are supplied with the machine and additional rolls may be had at any speed you wish. The fact that the tapes are so THE PORTABLE TELEPLEX long gives the machine quite a varied reper- toire; an advantage apparent to those who have used machines where the records are soon learned by heart. The Teleplex is supplied in a leatherette- covered case. It uses a regular phonograph motor for power and contains the neces- sary batteries for operation of the buzzer. We wish there had been some such de- vice available when we were learning the code!

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NOVEMBER, 1927 OST Full-Wave Self-Rectification and Crystal Control A Description of 9UZ-NRRL By F. H. HILE on the NRRL cruise I learned a great deal about signals as most of the operating was done under conditions that tended to submerge all but the best of them. It might, therefore, be expected that I had some well-formed Schnell* many faults, I decided to use none of these but instead to employ full-wave self-recti- fication. Yes, it requires additional tubes, but think of the simplicity. No thingama- bob to tip the mercury are to get it start- ed; no messy chemical jars to clean, and no synchronous con- ideas as to just what sort of a transmitter I should like to have when I arrived back n Hartford. This was the case; yut before I was ready to go ahead with the construc- tion of an outfit, I accepted a position with the surgess Laboratories Madison, Wiscon- sin, and consequent- ly planned to build after getting settled there. In my mind I had pictures of this transmitter, but when I saw the de- sign of a new trans- mitter at 9EK-9XH, which Hoffman had just completed, I got an assembly idea. A look at the photo shows the front of the panel and the full-view method of mounting the instru- ments. It is certain- ly a big advantage to be able to get at any part of the set without tearing the rest of it to pieces. While I should like to have a nice d.c. note, a generator is an item of consider- able expense and so t was necessary to fall back upon some method of full-wave rectification as the use of half-wave or “Taw a.c.” was out of the question. After thinking over the various types of recti- fers that are available and reviewing their 9UZ-NRRL, 1915 Photos, including cover Madison, Wisc. *Lieut.-Commander, U.S.N.R.;_ Sherman Ave., Madison, Wisc. THE TRANSMITTER AT 9UZ-NRRL Photo by A M. tact bother, not to mention the filter dif- ficulties that come after these other things. Close the switch, press. the key, and away she goes on all six (tubes). There were other things for decision. What about the note and what about keeping the frequency steady? Is it going to be one of the ether-hogs that eats out a hole in our limited band of fre- quencies and at the same time moves that hole up and down the _ scale? Full-wave rectifica- tion cannot be smoothed out readily and unless some- thing else is done the note and fre- quency may be as bad as some of the others and probably worse because of the power. What is the answer? Crystal that’s what So we with these transmitter of con- struction that en- tails simplicity and is easily accessible; has plenty of power, decent plate supply, a steady frequency and a good readable note. We must lay it out on paper first, being careful to design it so all parts will fit in their proper places when the time comes for assembly. The “bugs,” or as many as possible of them, should be taken two open control; it is! start off ideas: a Vinje,

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paper work. 20 inches wide and 36 inches of hard maple % of an is assembled with brass re ive rectification, we I in each cir- ai: 5 | 7 |} be 00s Hy |e wt 2005 mtd that when working hard be drilled The panel two horizontal pieces, one Each piece is Ww Ss hole has to rew soaped. tubes r UX-210, 2 203-A The 7.5 watters itors in the crystal watters will be the and the 250- the power ampli- tal-circuit mportant. ylers tubes. so important, to mention here some »f this circuit. t by which the plate and ar- (Figure 99 —_— OST NOVEMBER, 1927 radio-frequency-milliammeter is connected between the crystal and ground to meas ure this current. This is the governor. As long as the current stays at 100 m.a. (not above that) when using a 7.5-watt tube, there is little danger of destroying the crystal unless something else goes wrong Then, by using a voltage on the plate that is of the order of 400 to 500, fairly decent output can be obtained. It may be neces- sary to use a “C” bias with some crystals when using this voltage. In this particular case, the plate voltage is 350 to 400 with a plate current of 120 m.a. The oscillator plate inductance (L1) is 4 inches in diameter, wound with 16 turn of 1/16” x %” copper strip. The support ing strips are hard maple 4”“x%”"x7'”" These strips are secured to the bakelite tub- ing with 2-56 brass machine screws. The bakelite tube is 2%” in diameter and % wide. The assembly is shown in Figure 2 Turns are spaced 4%” with grooves cut into the maple strips to maintain the spacing The length of the winding is 6 inches. The inductance in the plate circuit of the 50-watt doublers is wound on the same siz« form—11 turns spaced 4”. Spiral or pan it crystal tubes may is provided, because of little importance mn N is 1 with the current flowing in cuit. It is far more im- ystal is to be operated DUCTANCE MOUNTING an excellent the crystal w the current in the crystal indication itself. A THE RECEIVER AT 9%UZ-NRRL cake inductances are used in the 250-watt amplifier circuit and the antenna coupling The first has an inside diameter of 4 inches, 11 turns, spaced 4%”. Antenna inductanc: has 9 turns, otherwise the same dimensions The crystal holder and mounting are a follows: A strip of hard rubber 3/16’x1"x 3%” is used to support two General Radi type 274P plugs, spaced 1%”. The crysta holder consists of a> round brass plat %”"x2%” with %” cut away and replaced by rubber, which acts as support for on terminal. Mounted on top of this brass plate is a round piece of hard rubber 3/16”x2%”, in the center of which is cut a hole 1 inch square to hold the crystal in place. The top plate, or other termina! of the crystal holder is 63/64” square an 1/16” thick. A small spring made of No

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NOVEMBER, 1927 26 copper wire is soldered to the top plate and the other end is soldered to the ter- minal support. General Radio type 274J jacks are used for terminals, spaced to fit the plugs’. See Figure 3. The crystal-holder plates should be plane, parallel surfaces. They can be ground with valve grinding compound and finished ff on a new Pike No. 60 oilstone. The rest of the parts are given in the list accompanying the complete circuit dia- gram. Most of them are standard on the with square Center oO rystal hohe in which » crystal fits. Aord Rubber te A. nsudoting OQ amu ul 7 Y piece ZZ “b 4 s St ae? US () GR. Sacks () Cw W7] i ; > CGR Plugs sad H Ht — m : Support for mounting nsulating protective plate Lower plale Word rubber Brass \ OST in diameter, No. 14 wire, is connected around a 3-volt flashlight bulb or a thermo- couple galvanometer. If the galvanometer is used, a condenser must be connected in series with the loop. A lamp is best as a starter—not so expensive per burn-out. However, with care, there will be no burn- outs. The crystal circuit is tuned up for maximum efficiency and the filaments of the 250-watt tubes are on, but their plate leads from the transformer are disconnect- ed. The amplifier is tuned to resonance— indicated by maximum brilliancy of the flashlight. Then the neutralizing condenser (C2) is adjusted (the tap Mard Rubber R) off the inductance being found by experiment) until the lamp shows a dead spot—it goes out completely, but will light on either side of this con- denser’ setting. For neutralizing 250-watt tubes (capacity about .000022 ufd.) the condenser has a maximum capacity of .000050 ufd. Then the plate leads are connected and while the key is left open, a final adjustment is made. The capacity of the transformer must be accounted for, and calls for a slight change. When this final adjustment is made, the key is closed and the plate volt- age increased until the desired input is obtained. If the set is not proper- ly neutralized it will show up in the crystal plate circuit, the current in- creasing with regeneration and de- creasing with “degeneration”—“de- generation” for lack of a better term. Plate ; 63° «5 2re 1 é4 Square Brass Top When making first adjustments, the lamp is held about 2 inches from the amplifier inductance, but close enough ‘oer a j thick ag ~ Se : cal 7 so indication is pronounced. Very a of i * fine adjustments may be made with 2 think a ck the thermo-couple galvanometer. CK . . It is unnecessary to neutralize the FIG.3 50-watt doubler circuit but when it is amateur market and you will find them ad- vertised among the pages of QST. The present crystal oscillates at a fre- quency of 3,976 Ke., (75.4 meters). When operating at the natural period of the crystal, the 50-watt doubler circuit is left out entirely by merely connecting the grid feed of the 250-watt amplifiers to the plate nductance of the crystal oscillator plate circuit. The amplifiers are neutralized, a most necessary thing, otherwise there would be regeneration or “degeneration” liable to cause trouble dn the crystal circuit, espe- cially if the amplifiers break into oscillation. Neutralizing is very simple when using the following method. A loop about 4 inches l An excellent crystal holder may be obtained rom the General Radio Co. if you are not particu- rly interested in building your own. used, the amplifier is neutralized the same way as when working at the crystal frequency. In passing, I wonder just what energy is dissipated in the filament of the flashlight bulb the very instant it goes west, which once happened when I closed the key after securing neutralization and neglecting to remove the loop and lamp. The assembly can be seen in the photo- graphs, details of which are of little im- portance. The only back panel mountings are a couple of chokes and plate condensers for the 250 watters. Transformers and batteries are on the table back of the panel. The rest of the table is used for a couple of keys, control switch and receiver. The receiver is the same as that described in QST, June, 1925. The Zepp-type antenna is a single No. 12 enameled copper wire 56 feet long, horizon- tal, 55 feet above ground. A 12-volt, 3 c.p. 35 +. ae oe am

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_— ~~ inches of the antenna at is used as a maximum cur- Feeders are 36 feet long es, also No. 12 e.c. wire. ird maple %” square. is made up of two pieces; OST NOVEMBER, 1927 schedules (except Wednesdays) have been kept with Warner, 1BHW, with only an occasional miss. 9UZ operates usually on 37.7 meters (7,952 ks.) during the summer months and the higher waves during the winter months. In either case “KB” re- FIGURE 4 Li, L2, L3, L4 are described in the article. Cl 0.00045 mfd. National Company transmitting condenser, " v. C2 0.000050 mfd. Specially double-spaced by National Company, 3,000 v. 0.00023 mfd. National Company, 3,000 v. 6.00015 mfd. National Company, 3,000 v. 0.0005 mfd. 2,000 v. Dubilier type 577A. 0.0005 mfd. 3,000 v. Dubilier type 577A. c3 c4 C5 0.002 mfd. 3,000 v. Dubilier type 580. cé C7 cr 0.000025 mfd. 10,000 v. Wireless Specialty Model UC-1803. C. 1, 135 turns No. 26 D.C.C on 2” bakelite tubing .C. 2, 135 turns No. 26 D.C.C. on 1” bakelite tubing used in doubler and amplifier circuits when operating on 37.7 meters (7,952 ks.) Mi 0-5 amperes (R.F.) Jewell pattern No. 64, flush mounting. M2 0-15 volts (A.C.) Jewell pattern No. 74, flush mounting. M3 0-10 amperes, otherwise same as M1. M4 06-1000 milliamperes. MS 0-1.5 amperes, otherwise same as M1. R1 1 ohm—2 Frost 2 ohm rheostats in parallel. R2 Radiccorp cost $5.00—you know the one. R3 Special James Biddle, 0.48 ohm. Thordarson 300-watt 12 volt center tap filament transformers. Therdarson special plate transformer, supplying 350, 1,000 and 2,500 volts on either side of the tap. x3”x28’ and the top section verlapped and bolted together, 55 feet high. Two sets of support it. Insulators break wires every 20 feet. The mast is 20 feet long, being 2”x2” of 4 guys. December, of last year, daily ports signals consistently R6, frequency steady as a rock and good readable QSB. Although I value the splendid (perhaps too enthusiastic) reports of hundreds of other amateurs, I must give more credence to the reports of “KB” since he has listened to these signals nearly every day for several months.

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ed hance of hearing some of the “2X—” sta- Electric Co. and the which have begun to tions of the General Radio Corporation DIVISION each sends \fo Ya hour NOVEMBER, 1927 S WAS announced in the September | issue, we are running a second In- ternational 5-Meter Test this month. The schedule is given below for those vho have not seen the September issue. In addition to our own stations we have a Ost The November Tests chance of arriving without encountering too many obstructions. It is at least hoped to reach those points that are high enough up to be reached by “straight line trans- mission”. One might suppose for instance that there would be a good chance of hit- ting the observation gallery of the Wool- worth building, though the chances of re- ceiving signals may not be very encouraging SCHEDULE A Starting Time and Day LOCAL CLOCK TIME AS GIVEN By . . NEW YORK WORLD ALMANAC See note os LONDON TIME Ey ON TIME i 7: NEW ZEALAND AUSTRALIA OCEANIA ricluding HAWAII ASIA 2 AFRICA ASIA MINOR 3 EUROPE | ALASKA LENINGRAD 4*® ATHENS 400 4 Af Sunday MELBOURNE 800AM Sunday | WELLINGTON 930 AM 0:00 PM Saturday) S00 PM. Saturday HONOLULU 30 AM + _ ———— ADEN 30 AM Sunday BOMBAY 4.00 AM Pm Sat | 030 Jal 5:3 M Sature HONKONG 6:30 AM x aturday | 5:30 P Sa addy YOKAHAMA 730 AM | PARIS 00 PA Saturday AMSTERDAM (1:20 P At . BERLIN. ROME STOCKHOLM. COPENHAGEN 00 PM Saturday| 6:00 PM Saturday /hdmght between Saturday and Sunday | MEXICO | DENVER 4 soum AMERICA MEXICO CENTRAL AMERICA! CHICAGO NORTH AMERICA | SANTIAGO DE CHILE e4a7Pm RIO DE JENEIRO 8.30 PM 4:30PM 4°54 PH" 5:30 PM | SAN FRANCISCO. USA 3°20 PA Saturday wo PM Saturday |\6°30 PM Saturday | + Fin eny doubt figure from New York or London Schedule B is the same except just 1/2 hours /ater make tests in the vicinity of the 5-meter band since the thing was stirred up by the Experimenters’ Section. One trans- REAR VIEW OF THE PARMATER 5-METER RECEIVER From left to right we have the filament rheostat, the tuning system and the regeneration control. mitter is rumored to be hung on one of WGY’s tall masts so as to have a chance of giving the waves a “clear start” with a fair if the present writer’s experience with the New York City 5-meter noise level is of any value. Regardless of the origin of the signals the reports on the 5-meter receptions should be made to Experimenters’ Section, A. R. R. L., 1711 Park Street, Hartford, Conn. The test is open to all, regardless of enroll- ment in the Experimenters’ Section. STATIONS TRANSMITTING As far as we know now it seems probable that there will be stations transmitting in all districts of the U. S. A., several of the Canadian districts, Australia, New Zealand, Japan and most of the countries of Europe and South America. As in the April tests it is expected that a number of other sta- tions will transmit without first notifying us. They should have a better chance this time as the 20-meter band seems to have returned to normal and semi-local 5-meter tests seem to suggest that this band is also back to normal. The chances are further improved by the fact that those reporting transmitters ready all say that the set is both better and more powerful than before. an

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EW OF Ost THE SCHEDULE transmissions on two week- nsmission being divided into urs apart so as to make the A OF THE PARMATER RECEIVER secondary and a tickler, the heing used. The two sets of coils meter band and a trifle more. has a es more equal. To give a bet- * signals to fade, larger groups vr longer periods than in iggested that where possible 2) THE PARMATER 5-METER INVERTED TO SHOW CHOKES ration control is at the right and op- ting series resistance in the positive ead of the detector. er be run by one man while the receiver out and listens e test. test, accordingly is as follows. > November 12-13, send sched- hours later same schedule known as schedule B. f November 19-20, same pro- schedule A as shown in table ime schedule 12 hours later. 19 NOVEMBER, 1927 The following conditions remain almost unchanged from the former tests. 1 Prizes will be given for the best DX in the way of reception, provided that the reception is fully confirmed by some copy of what was said and all other details that can possibly be thought of. 2 For the best two-way contact arising from these tests there will be a separate award, providing the distance is over 600 miles. “Best” here means both distance and goodness of communication. 3 If there is any doubt on the awards a committee will be chosen to decide. 4 Be sure to operate your transmitter between 4.9 and 5.1 meters, using the best standards you have. 5 Call CQ once, put your intermediate in once, then sign three times and repeat. If any code letters are added think them over to be sure they will not be confusing AUSTIN A BY LIDBURY OF 8BAG The condenser is a Cardwell li-plate reduced to 1 rotary and 2 stationary plates with triple spacing The extra plate B is supported adjustably by the screws A so that the condenser has a high but ad justable minimum, which prevents the usual diffi culty of an excessive range. The shaded parts of the drawing represent the hard rubber insulation The tuning range of the 4’ coil of No. 8 wire is from 58 to 64 megacycies with a rotation of 20 to 90 of the condenser. Two other coils are used for ranges above and below the band. 6 When you copy anything notify A.R.R.L. headquarters at once by radio and wire, confirming fully and in detail by mai! —R. S. K. TRANSMITTER SUGGESTIONS For those who still have not put a trans- mitter together it is suggested that first several hours be spent going thru the last 12 or 15 issues of QST. Next after this it will be well to keep in mind that if a transmitter is unsteady with d.c. supply th: thing will be very ineffective with a.c. sup ply because the wave slides back and forth with each half cycle and hence is “all ove

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NOVEMBER, 1927 he tuner’. This means that at any one ining the signal is effective only at the very ief moment when it is whizzing across the tune—and most of it is utterly wasted. An deal combination would be a battery or gen- rated-operated master oscillator not keyed ind feeding a small part of its power to an nplifier tube of the same size which cou!d be keyed and which might have either d.c. a.c. plate supply. Such a transmitter will be tried at both 2EB and 10A. Listening to the transmitter with one’s wn receiver is valuable but little is learned nless the receiver is so made that very radual tuning is possible. If the thing yvers the whole 5-meter band and does not lave an exceedingly high ratio vernier the hances are that even a terribly broad signal ill seem very sharp. Try it first with a nall d.c. oscillator, battery driven. If it TRANSMITTER MADE FOR USE AT IAHG, SEYMOUR, CONN., OPERATED BY C. J. WITYAK Though obviously built from what was at hand this set is sound electrically and mechanically and works well after much rough handling. It is semi- portable, not carrying a power supply but depending on picking this up at test points. The plug system at the right front provides for a 3-wire cable from the filament and plate supply. Since the circuit is the usual series-tuned Ultraudion the tuning con- denser is insulated from the base. To avoid a bulky resistor the water-resistance is used as a gridieak. A small hole in the screw top can be corked when the set is not in use. not possible to slide the note up and down gradually (just as with a 40-meter signal) then the receiver is no good for estimating ie operation of the transmitter—and not ery good for reception either. Naturally it is imperative that the tube in cool. If the plate glows the signal will lmost certainly be unsteady and consider- bly less effective than if less power were sed. Try this also with your receiver a alf mile away. There should be an automatic key by all neans, so that you can leave someone to OST 39 run the set and take the receiver out of your own interference zone, there to listen for other signals. RECEIVER SUGGESTIONS The receiver may be, as has been said be- fore, a detector-audio combination, a super- REAR VIEW OF THE I1AHG SET SHOWING THE ANTENNA FEED CONDENSER WHICH CONSISTS OF TWO DISCS CARRIED BY THREADED RODS The heavy lead at the right front goes to the antenna. regenerator or a superheterodyne, all of which have been described in past issues. The Parmater detector-one-step receiver is now regularly available and photos of it appear herewith. The receiver sent us for test seems to operate very nicely and carries with it a calibration sheet showing two curves, one for each coil. These curves check well with the wavemeter at 1711 Park Street and also with the one at 1OA—two independent tests having been made. This indicates that the antenna does not throw things out too badly. The Parmater receiver uses a curious form of series-tuned circuit which seems to be effective. There seems to be no reason why this is not a good receiver of its type. Where the noise-level becomes very annoying it may of course be necessary to resort to the superheterodyne which seems to offer no particular advantages except the one of supressing the noise somewhat as has been explained in past articles. WAVEMETERS The little General Radio wavemeter which originally “happened” because of our in- sistence that something of the sort was needed has become quite popular. A con- venient way to mount it is on one end of a sort of wooden paddle, the dial being (Continued on Page 78)

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NOVEMBER, 1927 Ost mateur Radio and the Pacific Flights By J. Walter Frates* and A. L. Budlongt ok is published chronicling ements of the amateur, no ling chapter will be found describing the participation embers in the communication for the recent Pacific flights, th the Honolulu-California nnection with the Dole race with the installation of an on Captain Erwin’s Dallas reception of its signals right of its tragic end. double triumph: first, for the rganized amateur radio, which . H. Eichwaldt, Navigator and H. MacLafferty, Jr.. 6RJ; Capt. : T. F. Babcock. 6APA. the Post-Enquirer, Oakland, Calif. ter service to the world than 1ercial companies, and second, endous effectiveness of short ng distances when used from first schedules in connec- lifornia-Hawaii flights were n station 6CZR at Oakland, \JL, at Lihue, Island of Kauai. schedule went Hawaii’s first arrival of Chamberlin and Byrd’s forced landing on the News dispatches and per- ages in connection with the flight of Richard Grace, the ked flyer”, were also passed 6CZR-6AJL tie-up, but no dope Vaitland-Hegenberger or Smith- s Ave., Oakland, Calif. Sec’y, A.R.R.L. Bronte hops could be handled, due to the untimely intervention of daylight. By this time, however, the preparations for the Dole race were well under way, and simultaneously the amateur group became extremely active. Ralph Heintz of Heintz and Kaufman, installed one of his beautiful jobs on the Pabco Pacific Flyer, piloted by Major Livingston Irving. The set was tuned to 33.1 meters, and it was expected that it would be operated continuously on the flight, thus. giving the world an hour-by- hour record of the race. Heintz also secured Fred Roebuck, 6AAK-exKFUH, and one of the best operators on the Coast, to man 6XBB-6GK, the Heintz-Kaufman station, for the purpose of keeping a con- tinuous watch on the plane’s signals. Roe- buck asked a group of San Francisco Bay amateurs to assist him in this work, and requests also went out from 6CZR to 6AJL and 6CLJ, both at Honolulu, to handle the Hawaii end. In the meantime, another group of ama- teurs, in codperation with the Oakland Post- Enquirer, put up a station at the Oakland Airport, Ronald Martin, 6AYC, vice-presi- dent of the Oakland Radio Club, loaned his T.P.-T.G. transmitter, and the station, operating under the call of 6NO, was soon in communication with 6BUC at Honolulu, which in turn was linked with the Naval radio stations by phone. With a number of Honolulu-California schedules working, and with a short-wave station on one of the racers, amateur radio was “sitting pretty” and ready to follow the race from start to finish. At this point, however, a severe disappointment came in the crash of Major Irving’s ship and short- wave contact with the racers themselves was eliminated. Nevertheless, 6NO went into action with a bang, and gave one of the prettiest exhibitions of amateur ca- pabilities seen on the Pacific Coast in years A watch was maintained on 600 meters for the signals from KGGI, Goebel’s Woola- roc, and for naval and marine reports on the flyers’ progress. On several occasions new developments in the race were announced to the press and wire services minutes ahead of the commercial companies’ an nouncements. A continuous twenty-fou! hour watch was maintained at the station by 6AYC, 6NO, 6RJ, GAPA, 6PR and Wa! lace Brainerd. Equipment was loaned by 6ARK, 6CCU and Leslie Joost. Traffic for the flyers was routed to Honolulu through 6BUC, where 6NL and 6DMM assisted, and was delivered by the operators of this station to Goebel and Jensen im-

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NOVEMBER, 1927 mediately upon their arrival. Reporters were on duty at the station constantly to get the news as it came through. With the disappearance of the Miss Doran and the Golden Eagle, the station ontinued its work, the operators giving up time, sleep and food to carry on the work. When the unconfirmed report of the finding of the Miss Doran eighty-five miles from Hawaii came over the Oet 41 mitter brought news of the progress of the plane, interspersed with the very human comments of Eichwaldt, the navigator and radio operator. For half an hour before the final crash, however, the note became unsteady, the frequency rising and falling at intervals, telling a tale of “bumpy” weather conditions and uneven speed. To those who could read the story of the vary- ing note this caused wire services, it was TINT hecked with Honolulu, Hy and found to be false, WA both through 6NO-6BUC 1] ind 6CZR-6SH. Captain Erwin’s an- nouncement that he would hop for Hawaii in an effort to locate the Viss Doran and _ the Golden Eagle, brought Ralph Heintz and Fred Roebuck into the flight again. These two, with the assistance of the gang at 6NO, persuaded Erwin that his best course was to install a short-wave transmitter, and the Heintz again installed the fifty-watt transmitter that had been on the Pabco, operating on 33.1 meters under the call of KGGA. The work on this installation yas pushed through at great speed. Preliminary tests gave excellent signals and when the Dallas Spirit winged its way past the Golden Gate was felt that it would be in contact with both ends of the course the entire dura- tion of the flight. As the plane passed the coastline the gang at 6NO, and Fred Roe- buck and Ralph Heintz at 6XBB, picked up the transmissions and prepared for the long watch. Prior to this, 6RJ had broadcast requests to all amateurs to stand by on KGGA’s wave and all up and down the oast amateurs were tuned to the signals. 6DOK, 6CLJ, 6DCR, 6NT, 6NI and F. L. Dewley, district manager for the Federal lelegraph Co. at Los Angeles, followed the signals easily, Mr. Dewley furnishing the local press with bulletins. 6CKC kept watch also, and in addition maintained regular schedules with TAAT and 6BAF with press announcements. 5ANC heard the signals, as did many other amateurs in the interior of the country, and 2U0Q, at New York City, copied the transmissions solid. The story of the Dallas Spirit is now a thing of the past, but the gang that fol lowed the signals up to the last SOS will never forget the drama and tragedy of that night. At no time were the signals of KGGA anything other than tremendously powerful. The strength even increased as the plane got further out over the Pacific. For hours the steady drone of the trans- considerable concern, which was only partially relieved by the jocular and unconcerned com- ments of Ejichwaldt. Then, at 9 p.m., came the first SOS! It was almost immediately fol- lowed by a terse “Belay that”, and the further announcement that the plane had been in a spin but had come out of it. Right on top of this news, however, came the second SOS and the announcement of the second spin, the rising and falling whine of the note telling its own story to those ashore. The second SOS was cut short by the crash, and al- though a continuous watch was kept from both the Honolulu and West Coast stations, no further signals came through. Here we must pause a moment to pay tribute to the cold nerve and supreme cour- age of Eichwaldt, the operator. During the half hour preceding the crash, when the plane was bucking squalls one after the« other, Eichwaldt continued with his uncon- cerned comments and jokes, although he could not have failed to realize the danger the plane was in. His first SOS, and the remarks immediately following it, were still in the same light vein, and showed no nervousness whatever. When the second spin came, and the plane started down to its end, Eichwaldt continued sending in the same even, unhurried manner that he had used during the flight. He stuck to his post to the end, sending calmly and evenly right up to the time the plane hit. With the note rising to a shrill shriek and fall- ing almost to zero—denoting violent move- ments of the ship—the dots and dashes came through like clockwork until they were actually heard sputtering out as the antenna hit the water. To know that he was heading for his death, and then to stick by the key telling the world just what was happening right up to the last second required courage of the hichest order. Eich- waldt preserved the highest traditions of the radio operating fraternity. From the flight we get one big lesson, which is that short-wave transmitters are highly feasible and especially valuable for (Continued on Page 80)

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ery on NOVEMBER, 1927 More About Clickless Keying By Blakely E. Cross* t reading the letter by M. W. ng on page 70 of the Septem- ue, I decided that it was the ut of my difficulties. Like umateur world, 8ANX-8QU is single circui. tuners, and rage battery plate supply of the aused no trouble to real re- round here, it kicks up an un- in these “dumb-bell” tuners. n of chokes and condensers n tried at the transmitter has t, either. ystem was built up according pecifications, but when I tried little 201-A’s handle poor + 4014 “te 2 lec a - : 5 ») (nid ais nj ngsten © y Wy i meV A + pe > —— 4 i + ee ft Ce Aabaak (ren ov! BE NOTICED THAT THERE ARE TWO KEYS erates the tube-keying system, but since faile when the 110-volt line fails, it is rovide another keying method, as 8ANX- to be an “emergency station.” A the relay filaments would take dificulty. Emergency keying is done by ich operates thru the same filter as key refore retains some of the same advan- keying filter is not necessary with the ystem, however. No switching is re- watts input, I ran into diffi- keying tubes would not light igh to pick up the dots properly, hes ended way up in the air. A ’ sufficient value to keep the varm, but just under the point began to pass current, caused pick up promptly, but the dashes plenty of sockets, so two more fted, and another 201-A pressed 8 Elm street, Gloversville, N. Y. into service. An old 200 tube, with a one- ampere tungsten filament, was placed in the remaining socket, the grid and plate ter- minals being insulated before insertion. The heavy tungsten filament of the 200 soaked up the current when the key was raised, causing the 201-A relay tubes to go out im- mediately, thus eliminating the tails on the signals. A fixed resistance of the proper value should work just as well. Still, the note of the transmitters were not the crystal-controlled notes 8ANX-8QU has been noted for, (if we may believe re- ports!), so it was evident that the relay tubes were overloaded. An increase in the grid bias on the keying tubes from 45 to about 70 volts cured this, causing the tubes to pass the full plate current immediately, instead of building up gradually. It is now possible to pass over 300 mils thru this system without any signs of heat in the plates of the 201-A’s. Of course, any such overload shortens their life. In this con- nection, I have found that tubes with the filaments patrially de-activated work quite as well as good ones, and in addition, have less tendency to leave tails on the signals. The grid bias must be higher on old tubes, however. (A single 22%-volt block is suffi cient for tubes which test 1.0 or better.) The diagram shows how it is done. I! welcome comments, for surely any method of keying which will do away with the clicks from a d.c. transmitter plate supply is badly needed, and others may discove: better methods of using this system. It works well here, for the neighbors don’t know when I’m home now. Hi! Buening asks us not to laugh at him, and I, for one won’t. He discovered something!

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NOVEMBER, 1927 OST Receiving Antenna Tuning Systems By G. H. Browning* A rather neglected problem is here attacked from the standpoint of the strength of the received sig nals. it of interest to investigate further with a view The author suggests further work for those experimentally inclined and readers may find to discovering other effects; especially that of the changes in selectivity when going from one system to another. —Technical Editor. S FAR as the writer has been able to determine, antenna tuning sys- tems have been neglected where exact measurements were concerned. Those designing sets have followed one of the conventional methods, as a general rule, vith very little experimenting as to the elative merits of the different systems. Because of difficulties encountered in tak- ng measurements, the data given in the following are far from complete bat some dea of the relative merits of the three mmon types of antenna tuning systems nay be obtained from the curves given. The voltage step-up of an antenna tuning device is a very appreciable quantity ranging from something less than 100 to as much as 00 in the case of a low resistance antenna ind an efficient tuning system. So important s this voltage amplification compared to the gain derived from a tuned radio frequency transformer, which gain is seldom ver 15, that efforts to use choke coils in the antenna and an additional stage of radio frequency amplification to secure single con- trol have frequently resulted in an appre- ciable loss in signal strength. Three common types of systems, shown Fig. 1, were chosen as most representative f present day practice. The old single ircuit with a condenser and a tapped coil n series with the antenna-ground system was not included for the reason that two idjustments are needed to tune it efficient- } Neither were loosely coupled systems ncluded for the same reason. It was thought at first that measurements uld be made by means of a signal induced n the receiving antenna-ground system, us- ng a shielded oscillator some distance away. rhe pick up as obtained in this manner was not satisfactory, however, due to the fact that a large percentage of the signal was not taken through the receiving antenna- sround system. The writer is almost certain that this method can be made to give satis- factory results by placing the oscillator a mile or so away instead of a few hundred yards. In the set of measurements taken, it was imperative that there be no delay. Day- time signals from four local broadcasting stations approximately six miles away were *President, Browning-Drake Corporation, 110 Brookline St., Cambridge, Mass. accordingly used, and the measurements are therefore shown for the broadcast wave- lengths. The method of measurement consisted of connecting a previously calibrated vacuum- tube voltmeter to points A and B in Fig. i. All of the systems were fixed so that the operator could change from one to the other with the least possible delay. Of course, one could not be sure of the degree to which the signals from any given station were constant, even in the daytime, so that com- parison between the systems for different broadcast signals had to be made. The ¥en. € SYSTEMS A FIG. 1. THE ANTENNA TUNING WHICH WERE COMPARED A is a combination of conductive coupling with a series condenser which drops out of reckoning as the antenna is made smaller and thereby leaves a circuit equivalent to that of C with the antenna tap moved to the top of the coil. B is close magnetic coupling. C is close conductive-magnetic coupling. modulation of the carrier in every case was such that the vacuum-tube voltmeter read- ings were not appreciably affected by changes from an unmodulated to a modu- lated signal at the broadcast station. This is probably the case with any station with high quality output. If the carrier is over- modulated, harmonic frequencies are in- troduced. Therefore, using this method an excellent comparison could be made, which seemed to be worth as much from the com- mercial standpoint as the exact voltage am- plification of each system taken individually. System No. 1 was chosen as the standard of comparison. Three different antennas (Fig. 2) were used, one 4 feet long, one ap- proximately 40 feet long and a third 75 feet long. The forty-foot antenna M had a ratio of about one-to-one vertical to horizontal component, the 75-foot antenna | was about 75 percent vertical and the 4-foot antenna § was entirely vertical.

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Ost NOVEMBER, 1927 were taken by reading the tmeter on systems A, B and recession aS was possible. » voltmeter, thus obtained, to actual voltage built up G 2. THE ANTENNAS SED IN THE COMPARISON. Note that the short antenna has a capacity small even as ympared to the series con- lenser of circuit 1A and a ength se short as not to load y of the circuits greatly. atory circuit and the ratio system B and system C the voltage across the oscil- n Figure 1, system A. Thus enal strength represented by B gave .15 volts, system B ng purposes, be represented ymparison was necessary in a graph representing signal e three systems inasmuch as stations were far from being | strength at the location used. ; the result of this comparison. onsidered as the standard of System B with the 40-foot an- med as B-40, with the 75-foot B 75 ete. System C with the na is designated as C-40, etc. ire interesting because some usions can be drawn. »ws up much better than any it short wavelengths.’ It was ore efficient than any of the the short antenna was used. rave more signal strength on velengths on both the 40-and 75-foot antennas. System B seems to be the least efficient of the three. In the case of the 40-foot antenna, the antenna-ground system together with the ten-turn primary seemed to have its natural period or a harmonic of the natural period in the broadcast range, for its response to 350-meter waves was con- siderably greater than that at other waves. It is hoped that in the Fall when the exigencies of commercial work are out of the way, a more compkete set of data can be wr wa S/6wal WocTAGE Commareo Wire CRC e $ ’ 400 WAVELENGTH (NW METERS FIG. 3. RESPONSE CURVES FOR THE THREE CIRCUITS OF FIG. 1 WITH THE THREE AN- TENNAS OF FIG. 2 The dots on the curves show the actual points found by ausing as drivers broadcasting stations on 250, 350, 430 and 520 meters wavelength. Since the sta- tions were not of the same strength the effect was as if the points X were obtained with a driver of one strength, the points Y with a driver of another strength, etc. The X points can be compared with each other, the Y points can be compared with each other, but there is no comparison between X and Y for the same curve even, not to mention other curves. It was therefore necessary to draw the curves as comparison curves, using the performance of the A circuit in each case. The curves therefore do not show the absolute performance of the cir- cuits but show how much B and C are better or worse than A. A does not give a flat response as a quick glance would suggest. Note that as the antenna is made shorter the curve for circuit C tends te parallel curve A, as suggested in Fig. 1. Note also that curve B-40 shows resonance, probably to some harmonic of the 350-meter wave. obtained. Because of the lack of informa- tion given, others who are equipped with a vacuum-tube voltmeter and a sufficient num- ber of local broadcast signals over the broad- cast range may be inspired to take a number of curves proving or disproving the con- clusions of the author as to the most efficient antenna system among the three types shown. 1. This does not necessarily mean that circuit A is the best for short waves; it may mean that system A is best for waves that are short as compared to the tuning range of the system being used. Thus with tuning systems ranging from 20-45 meters w« might find that system C was best at 40 meters but with tuning systems ranging from 40-90 meters w« might find that A was best at 40 meters. Note, how- ever that the comparison as made does not includ: selectivity against shock excitation such as that caused by power leaks and the like, in which the systems shown are known to differ noticeably —Tech. Ed

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NOVEMBER, 1927 Experimenters’ INCE inquiries are again appearing it S seems worth while to repeat that this Section is informal and has for its purpose nothing more than the _ ar- rangement of anything that may help read- ers of QST to work together on experi- nental work. More exactly, the Section keeps a list of nen interested in different problems so that any member may at will write to the thers working on the same problem. Out- lines are prepared and sent to those who prefer to work with a definite start in the shape of an outline, such advice and refer- ences as we can offer are available, and problems are suggested to those who care for such suggestions. Several engineers and scientists act as unofficial advisers in helping those who are “stuck” on .a prob- em. Transmission tests are arranged be- tween members or in codperation with other organizations, as for example the tests with the General Electric Co., which were re- ported in QST for November of last year. Various tests are now running—the 5-meter nternational, the observations on 2XS at 16 meters and several private inside the Section. tests Lately, at the suggestion of the member- ship we are reporting the results obtained in the partial solution of problems. Many omplete QST articles have been generated by the section and have appeared with credit to it. To do these things without an impossible amount of labor at the QST offices it is necessary to use a simple system, and those interested are accordingly asked to send for an enrollment blank, addressing the letter to “Experimenters’ Section A.R.R.L., 1711 Park Street, Hartford, Conn.” These blanks are received by Mr. Ross Hull who also writes the outlines and in general handles the activities of the Section. Please do not nix other things into a letter that concerns “X” Section activities as this causes delay and confusion. SPECIAL PROBLEM 66 UNDER WAY AT LAST After a great many unavoidable delays the special problem on the high-voltage aluminum rectifier for plate supply has at last overcome the several difficulties that stood in the way and has become active. Mr. Junius D. Edwards, Assistant Director of Research for the Aluminum Co. of America has gotten the material into shape and it has been distributed to those who are par- ticipating. This problem is one of the knottiest that we have at hand. ost Section Report CONCERNING THE 5-METER RECORD It is unfortunately necessary to state that the 5-meter record that was reported in September issue on p. 41 (last paragraph of EXPERIMENTER AS HIM THE ABSENT-MINDED RADIO REVISTA SEES column 1) has turned out to be the subject of a serious error. The following letter ex- plains itself. “September 19, 1927 40 Magnolia St. Suite 2, Boston, Mass. Mr. R. S. Kruse American Radio Relay League Hartford, Conn. Sir:- In reply to your letter of Sept. 16; I would state again that there was no two-way con- tact between myself and 9EHT. As stated in my former letter and report, my trans- mitter was never reported except by my own portable field set and was used only to check up on receiving conditions etc. I do not remember making any statement to the contrary in our conversation and I certainly had no ground on which to base such statement, however if I did make such a statement, or said anything at all that led you to believe that two-way contact

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OST ry sorry to have made it. h credit for anything I did was with that in mind that I soon as I had seen the last. heard several times, both on Lutesville (Mo.) and with eiver at different locations. sh to state that I am sorry vas made and that I assume all f the error and wish to offer es and regrets to yourself, to d to the entire ‘X’ section. Very truly yours, Herb Clark Jr.” that this letter will be re- same frank manner in which The Technical Editor also de- » the Section his apologies nintentionally made an _ in- It must be remembered also f Messrs. Clark and Douglas tand as excellent and in fact y best that has been done. NOVEMBER TESTS ynditions very much improved xcellent opportunity to check series of international tests » mysteriously. The schedule where in this issue and should with care. “BREEDS” OF CHOKES report on the choke coils suggested that the choke is very much the nsmission while the less ex- ls of the receiver can be sat- ugh by a multi-layer or pie- ke which will not be nearly the best one-layer choke but ere be good enough for receiv- Putting it differently, the hoke could be made to be ex- limited region though with yn might include our 20-, 40-, territory, which isn’t so small the other hand, such a choke pe of working from 15 to 200 we expect receiving chokes to from 15 to 600 as some of us r such a range the complex better since they do some almost any wavelength. These were discussed by Mr. Lidbury. 1 third distinct class of choke, t we call a “tuned trap.” Why ed is hard to say, for it also ance-capacity arrangement with e that the inductance is small pacity is large and lumped in a instead of being spread thru of a coil. Such a “condenser- has a tremendous impedance issue 7 NOVEMBER, 192 at some frequency—and almost disappears off that frequency. If one does not change wavelength too much or too often such an arrangement may be very useful. It is here discussed from the transmitter stand- point.—Tech. Ed. Condenser-Tuned Short-Wave R. F. Chokes By A. Binneweg, Jr.* XPERIMENTS with tuned r.f. choke E; coils have proved very successful and there is considerable advantage to be gained by the addition of one of them in the high voltage positive lead in any trans- mitter. The chokes used in most amateur nomen ay | CUntuned” | "RF Choke if desired A CONDENSER-TUNED CHOKE AS IT IN A SHUNT-FED HARTLEY OSCILLATOR. FIG. 1. WOULD BE USED The self-tuned or “untuned” choke behind the con- denser-tuned one handles affairs while the condenser- tuning is being attended to. stations are much too large for the purpose and are often so poor that their addition helps but little. A tuned choke can be made exceptionally effective and having its greatest blocking action at the particular frequency employed in the transmitter. A well-designed, properly operated, tuned choke will steady the signal, improve the note and often cut down harmonics. The results of experiments will be outlined. A typical oscillator with one of the chokes in position is shown in Fig. 1. In tests at 6BX and later at 6BAP, with a rather low-loss choke consisting of a Lorenz winding in parallel with a good variable condenser, it was found that the harmonics as heard in a nearby receiver were noticeably reduced by tuning the choke properly. In a 250-watt oscillator, in which the r.f. voltage is higher than usual, a very good spark could be obtained from A.R.R.L.., ex-6XAA. *Experimenter’s Section, University of California Radio Club, 6BX,

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NOVEMBER, 1927 the plate whereas on the other side of the tuned choke, sparking was hardly notice- able or was entirely absent. Try the choke you are now using with a wooden-handled screw driver, as suggested; you will be surprised. By listening to harmonics in both the 20- and 80-meter bands, first, with a typical “ham” choke and then with the tuned choke, it was noted that the har- monics were reduced in intensity. Tests on the air showed the same thing. With Jo Sek L__» Distributed Capacily FIG. 2. A TAPPED COIL MAY BE USED TEMPO- RARILY BUT THE UNUSED PART, WITH ITS DISTRIBUTED CAPACITY MAY RESONATE TO SOME HARMONIC OF THE WORKING WAVE, BY REASON OF THE EXTRA TUNED CIRCUIT SO FORMED is shown by the dotted lines. T ' ' ' ' == re ' ' ' 4 This extra circuit the poor chokes, good harmonics of the 250-watter were heard at 10 and at 5 meters at 6BX but with the tuned choke these were absent. The note of the main- wave was improved. These chokes act as wavetraps, excluding the frequency to which they are tuned and the theory of them demands a low-loss ar- rangement for best results. We found that an ordinary space-wound coil shunted with a double-spaced receiving condenser was just the thing. If in doubt as to the size of coil and condenser, about the same sizes as used in the receiver to cover the par- ticular wavelength-range is about right. Tune the choke until the plate current drops to a minimum and this tuning is not so sharp, allowing one to change the fre- quency of the transmitter without having oscillations cease. When the wave is once determined, the choke may be retuned. OST 47 When the condenser is set at a higher capacitance than necessary, it acts as a by-pass and if set at a lower value the r.f. finds its way through the inductance. When one of these chokes is used, no wavemeter is necessary for use with the transmitter as the scale of the condenser can be cali- brated for the range used. It is suggested that the transmitter be tuned in on the receiver and the choke be first adjusted by clicking with the receiver as an ordinary wavemeter. Then when in- serted in the plate lead, the setting will be correct. BEST” SCHEME THE “NEXT A tuned-choke can easily be made by us- ing a “tuning-coil” arrangement as shown in Fig. 2. Here, the distributed capacitance in conjunction with the inductance used de- termines a “parallel resonance” arrange- ment. It should be noted that the unused turns are in parallel with their distributed capacity and, should the natural frequency be near the frequency of the used portions, considerable energy would be absorbed giving an apparent increase in resistance (thus giving poorer blocking-action) and, of course, the resonant frequency of the used part would be somewhat different. The arrangement would act as two circuits closely coupled and there would result a response to two frequencies. Actual tests have shown the condenser- coil arrangement to act as a highly efficient choke. The amateur would do well to in- corporate one of these in his transmitter. The next-best arrangement would be a tapped-coil as described, w‘th relatively few unused turns. - VeStrays ; A QST advertiser who does a large mail- order business in radio apparatus has asked us to put a note in QST asking that people please use Money Orders or checks rather than send cash through the mail. Co- operation in this respect will prevent loss to either buyer or seller and will avoid the possibility of disagreement as to amount re- mitted. THERE'S 10c CALLING MK ssh KEEP oF = * 2 ae r FHA) TESTING OUT & PORTAGLE SAw RECEIVER UNDER SEVERE LOCAL INTERFERENCE CONDITIONS

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tation 17,1 which ilver plated and celluloid but- sed of two 110-volt, lamps in series. BELGIUM er holidays and a_ great QRN has somewhat slackened ties of our men but many essary additions and repairs ms in anticipation of the season. ntact between a Belgian and was recently made by was in communication for of an hour with oh6BDL. .. ile has been arranged be- | it is hoped they will be able h these contacts. Since last has been in communication U.S.A. seventh district sta- en in the sixth district. F.B! is our ‘master of traffic’ hed a month’s trip in the g visited the first, second, and ninth districts of the some parts of Canada. Un- was an organized tour which r a visit to Hartford or any nderful land with its many ateur radio is a very small st fetch a very long time New York or Chicago to buy ". It is also difficult to find h to purchase your big bottle tube, etc.). Inversely, the where, the same as the phono- trange enough, the latter has former. To the contrary we ression that the people are on broadcasting.” k, President, Reseau Belge, CHILE panying photo shows the 1CK located at Chuquicama- has been carefully construct- detail although several make- evidence of the dearth of ial. For instance, the grid 2 watt All fixed con- made as are the in- are of 3/8” edgewise home The transmitting circuit is 7 NOVEMBER, 192 the tuned grid, tuned plate arrangement. “The antenna and counterpoise are of %” copper tubing and are fed by means of a 12-foot, two-wire r.f. line, the spacing between wires being 6 inches. This line is of %” phosphor-bronze tubing anchored at the lead-in end to a pane of glass by heavy bronze bushings which are rubber washered. The antenna is vertical and thirty-two feet long while the counterpoise is hori- zontal, twenty-eight feet long and nine feet off the ground. Both lines are tuned by 350 uufd. receiving condensers. The heavy line is to prevent swinging and is stiff enough to accomplish its purpose even in a strong wind. No guys are used in any place.” —C. K. Topping. CHINA “Dr. Malcolm, Health Officer at Chefoo, N. China, has had a short-wave receiver for sclCK some months which had been built for him by our star performer, Edouard Foucret of Shanghai. He had no transmitter and to amuse himself and get some key practise, he inserted a key in the 45-volt plate sup- ply lead to the detector tube (201-A) and had some fun in working at anchor in Chefoo harbor. “On the evening of June 18th, he sent out a CQ and immediately got a reply from xep1MA which he believed to be some boat entering Chefoo. Imagine his excitement when it turned out to be the Portuguese cruiser, “Adamastor” then at anchor at Macau about 1200 miles distant. 3MA’s (Continued on Page 64)

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Sdid 8do 8ez abr Sade 9adk 9adn 9aeg Sack Sahq Yarn Yauu 9axq usc 9ben 9bdj 9bib 9blu S9bqe Ybuz Y9bwn Ybwo Ycaj ei 9che 9cia 9ck 9cces Ockf 9clr Yen! Bev Yecy Yexe 9cexz Sdaw 9day 9dbp 9dka 9dix 9dng 9drd 9dws 9dxm jeag Sefk 9ej Skb Bln 9xi oz-lay oz-4ao oz-lfe oz-3ac -4am oz-lfq oz-3ax oz-3au oz-2bx oz-lax oz-2bp w-2¢b oz-lfb oz-2ga oz-2g¢ oo--bam fs-kte od-pkl -pk9 ac-Sem bn-sk2 eg-2sh ne-5aj ne-3wah ne-4du ne-5gt ne-5bgo aj-Ism aj-lsk aj-jkzb ai-frj op-ldl -lay ef-Syor ef-Six eb-4ww nj-2pz es-2nm oc-Sxy p-lae x-cbz x-crlo oa-3es. oa-3ES, 13 Bedford Cres., Dulwich Hill, N. 8S. W., Australia labm ide l1fi Ixv 2all 2qs 3lw 4dar div 4rm 4tu Sain 5auz Sbze Set 5kj 5k! Sql Sua Gaak Gabg 6ajs 6am 6amn 6aof 6asi 6auw 6anj 6bhap 6bbv 6bde 6bec bev 6bhe 6bhi 6bhv 6bhz 6bia G6Gbis 6bsd 6byvm ébvy 6bwk 6bxe 6bxb 6cbhz 6cci 6ceco Gecr 6ceg Geec Scem 6chl 6chn 6csj 6cal 6ctd 6cuu 6ewl 6ezt Gerry fete 6dfe 6dfv Gdht 6Gdeb 6dp 6dxn 6ge Tabd Tabh Tem il 7km 7gi Tra 7tij 7ve Twu Txt Sajn Sbau Sbp! 9adk Sadn Sara 9cir 9bmp Yben YIcki Yekt BYexw Ykr 91k jekr Sow 9st 9xn ac-Shb af-S8fok af-hva aj-lsm aj-lsk 1j-jkzb eb-4dac ee-ear6 ef-Saro ef-8cl ef-Seo ef-Six ef-8jf ef-8jj ef-8ku ef-Sqrt ef-S8xo ef-8yor ef-ocdj g-2od eg-6og eg-6ta eg-gfy ei-luu ek-4yo el-lfe ep-lae s-2nn fe-b2 na-7kx nc-5¢o nj-2pz nm-In nm-1j nm-rx nm-9a nn-Inic nr-2fg ny-rxy oh-6amu oh-6buc oh-fcxy -6deu oh-6nl op-lau op-lbd op-lad op-lew op 3ac ank Szw. I. D. Miller, Forfar St., St. Albans, Christ- church, N. Z. 2awq 2byo 4rr 4tu 4ry 4hx 4pk 5k! 5zl 5re 6cu 6zd 6amu 6cua 6ezy 6bb 6buc xi 6akt Gafs 6czu Gayi 6esj 6cyu Ghu 6cco 6ahn 6ga 6cbhbz Gdhw 6G6dic 6dju Gbvi Gabe Gce 6mm esw 6cxi 6ey 6ceag Gbwk 6cae 6aes G6bxce Ghia 6bmo dgo Tsf Txf Tse Tab 8al 9cu 9pr 9dah Yekf Scuu ss-2bn oh-6nl ef-ub aj-jkzb jes ea-gp knt lie vis pio lidh jhl. G L. Hayman, Ixv laqt 5ql 5ai 5je 6re Neck, 312 rue Royale, Brussels, Belgium Ibhm lasu icjh icmf laxx ldm lajm ibkp Iry lvw lii laal 2aue 2agn ’evj Sad Saly Shox Sadg 8xan 9dws %ezv nec-lap c-lbr ne-lar ne-Jbi ne-2al sb-lad sc-2ah. ef-8RLD. R. Liebaut, Dameleirere, Meurthe et Moxelle, (mear Nancy) France lad! Imu 1bxn ibea iblw ibgq ibnu lbp lialw bus Ibms lawh laul led Imq lgo l1dq Iirp ixu lum lbw Ips lic ldms 2ase 2cp 2xaf 2qi 2ue 2ce 2um bif 2ld 2amj 2rn 2rr 2fs S3afu 3qt 3ae 3aef 3ajx Ssh Spf 3alq Swp Sbua 80q S3ajd 302 3id 3aim 4on eb-4UU, Paul de ldd laf ladm ibyv lbux fux 4oq dre 4hx 4co 4dair 5awr 5lu 5ux 5lr 5au 6am 6bau 6xn Tui Saul Sbm &8bpl Sbbr Scent 8iq &ecjb Sol 8exd Sbwa 8jq 9ads 9caj Sbbt 9ko 9mn. Conte, 24 Allee du Rocher, Clichy-sous- Bois, (S-et-O) France (20 to 44 meters) ef-ROSI, C. labd lads lamg lawm laxx iIbat Ibbe lIbhs Ibif lege lemf Iictm lIcue ldm Iff Imp Ipz lql lsz luz lvw 2abt 2afm 2afr 2ags 2agw 2aja 2ajb 2amy 2ate 2ats 2aue 2avr 2az 2bdn 2bdj 2bm 2gp 2gx 2ih 2mb 2qf Safu 3afw S8aiv 3bct 3bhd 3bjy 3bms Sbqj 3bsd Sbwt Scbht 3cef Scf 3ep 3ld 8lq Spf 3pr 3qe 3sh S8wj 4ei 4fe 4iz 4jw 4ik 41) 4no 4rn 4vh 4wa 4wo 5atp Snl Sux Swo Sabw Same Samt 8anc 8bic &bip Shox 9bpl Sbqj Sbup S8bwz Sbyn S8edf 8cke 8cl 8cxd Sexn Sdbe Sdea Sdgl Sdhx Sdpa Sdja Sim S8jr &kr Sit Swk S9adg 9amo QYaue Sbel B9beq Ybel Sbit Icke Bene 9cjr 9gx 9ke Yra Ysa Ylz ne-lbi ne-lbr ne-3dz nx-lxl nz-ez5. 26 Blenheim Park Rd., England eg-2BQH, G. G. E. Bennett, Croydon, Surrey, 20 meters) laba ladm laff lajm lakz lasu lawe lbat lIbbm lIbeb lbhm lIbux lbyv lbyx lecz Icjh lemf 1dl ldm lll lro Isz lvw 2aef 2agn 2agp 2alw 2amd 2aol 2avb 2Zawx 2bac 2bee 2cjj 2dr 2or 2tr 2xad 2xge 2xr S8bz¢g Sckl 3jx 3mv 3tn 4ft 4hx 4nj 4aqy 4tu bacl Sara 5ax 5mx Spt 6agr 6dcq Teb Trl Sacz Sadg Saly Sav! Sayo Shen Sbaf Sbtr Secs Scfa Scfl Scfr Scjv &ec!p Sdea Sdhx Sdid S8dod S8dsy 8ve S9biw 9bmx Sbay Y9bzi Y9cei lemv 9cso Sef keb kzet wbhu wtt ncn-cg ne-lap ne-lbr ne-3fe ne-9bz np-4pq np-4sa sb-spu sil-hjg su-lcd ai-vwz oa-3bd od-anf fd-crha fd-crhe fm-8mb. (40 meters) labs lafx lag laiq lamq lang lani lanv lare latu lavi lavj laxz lbat lbe Ilben lbdn lbeb lbgq lIbhs lIbko lbms libaq lbus_ Ibux lbvl Ieje lenz Ictu lcue Ide lem Ifi lfs like Iikf likh Imp Imv Inw lIpo Iiqi lql Iry lus luu luz Iixv 2aaw 2abt 2aby 2ad! 2aeb 2aes 2ab 2afm 2afx 2agb Zagp 2ags 2Zagw 2akv 2amc 2amh 2ang 2aqw 2arn 2asc 2ats 2aua 2Zaub 2auk 2avq 2Zavw 2axh 2ayj 2ayn 2az 2bac 2bad 2bbe 2bceb 2bco 2bdt 2bi 2bm 2bow 2bs 2bse 2bzj 2ea 2ci 2cjd 2cke 2ern 2Zewm 2cxl 2*y Zem 2fs 2gx 2ih 2iz 2jt 2kr 2kx 2mt 2nf 2nm 2or 2qf 2qah 2qv 2rs 2ub 2ul 2uo 2xaf 3afl 3afu S8ajt Sajx Saks 3alh 3auw S8bay 3bms 3bne 3baqp 3bqz 8bsb Shed Sbva Scab Scbht 3ced 3cfge 3cef 3ckl 3dw 3dz 3ec Sez Sck Sib Sku Sla 3ld 3mb 3mv 3nc Snr 83pf 3pr Sae 3sz 3tf 3tn 3uo 3ut Swf 3wj 4dabe 4ac 4cf 4cl 4dx dec 4ei 4fe 4ft 4fx 4hx 4hz 4iq 4iz 4jd 4jw 4lk 4ll tlp 4lq 4my 4nf 4nq 4ns 4ob 4oc 4ok 4pk 4qb 4ae drm 4rn 4drr 4sh 4to 4tp 4tu 4ux 4vs 4wj 4wo baf Bafk bame bamk bSamn Sauu 5Sdi 5ek bBhe 5jr 5ke 5k] 51f Smx 5nl 5qj Suk Sut 5ux bvwa bvx Swe 5bwo 5yb Szav 6xi 7Tfd Saaj Saec Sag Sagi Sagn Sagy Sahd Sahu Sako Sali Salo 8a’'u 8amb Samu S8anc S8asf Satq Sauq Savl Saze Sazh Sbad Sbal Shas Sbau Sbbd &bbs Rbek Shen 8bes Sbe Sbja 8bib 8blp Sbm 8bnf Sbou 8bpl Sbrf &bxe Sbyn Sbze Scau Sceq Scfr 8che S&chk Sciy Scjv Sent Scor Scpe Scepw Sctg Sctk &evs 8&exc S8exd S8daq 8dbm 8dem Sdef Sdex Sdhx 8djb Sdke S8dke Sdkt Sdlb Sdnf Sdnu Sdrv Sew 8gl Shx 8in 8jb 8jq Skf Smu &8pl 8re 8rh &rt &vj Swk QYadk Q9afx 9ak Sakt 9apv 9arr 9aue Yaxo 9bbk Sbel Sbew Sbeq 9bex Sbib Sbno 9bnp Y9bre Ybv!l Scep YIcfa Bcmj Iemq YIemv Yeng 9erd 9crj 9cu Y9cyw Ydah 9dds 9dea Sdga Ydgw Sdaqy 9dte 9dud Yeas Yebp Beey Yefk Yefo Yerh Yek Seky Seld Sep Ofi Sir Ske 9lz Imn Ypd Ysa Ysd Ys0 9wr nibvy wnp wobd aw5 ne-cf ne-vde ne-voq ne-lb! laao laba labd (Continued on Page 84)

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OST NOVEMBER, 1927 Correspondence The Publishers of for statements T assume no responsibility herein by correspondents. A Visitor 26 Jamieson Street, Sydney, Australia pleased if you would put a 1 QST to the effect that I am extensive world tour October 1 would like to meet some of lifferent countries. to Cairo and then up the Nile Some r so till December fifth. From rseilles and will spend a few ns of Southern Europe; pos- tome, Naples, Venice and m Christmas ’till the end of will be in Saint Moritz, Swit- the winter sports. Most of April will be spent in Paris nd other continental cities. I will be in England and ibly go across to America and Sydney. dates cannot be fixed, but any io societies who wish to get me could address letters c/o and Sons, Marseilles, up to 1927, and Poste Restante, St. that date to the end of Feb- 0a2CM, lurcan, President, Vales Division, Wireless Insti- a. Real Traffic Keewatin, Minn. lay, we had some real traffic tourists, who had read the tourist camp came over to | their money, with a es, Iowa. found out just what had gone back home. hard-luck story and w if we could get a message We were glad to stated that they had been were broke and They spent their in sending telegrams asking from folks at home but these ently, hadn’t received the tele- left them rather out of luck. some messages for Iowa and to 9CIY, 9ADS and myself. when I got home, I CQed Des without results. After trying hie it for a long time without any results, I listened for nines and looked their QRAs up in the call book. I heard 9AEP at Fort Dodge, Iowa, called him and he came back. I gave him the story about the tourists and also the long message asking for aid 9AEP sure is a wonderful op and I gave him the message, or rather the letter, and he copied the whole thing single. FB! He got the message through and the tourists received their money via Western Union the next morning. They were so glad, they didn’t know how to thank us for doing the good work and stated they thought amateur radio to be a wonderful thing, particularly in time of need. 9LA, at Des Moines, helped us out after the money had been received by sending messages to the folks at home stating tha‘ everything was now all right and the hap- py tourists were on their way home. I wish there was more traffic of this im portance and not so much of the “73” type George Maki, 9CWA Directional CQs 34 Walnut Street, Gloversville, N. Y Editor, QST: Just a word about directional CQs. If my log could be likened to a ledger page, it would look something like this. Plain CQs sent Answered 286 232 Unanswered Directional CQs sent Answered Unanswered Now, I don’t like to think that any o the gang are passing up these directional! CQs but the above figures covering a period of eight months would make it look as though they were. I sure do enjoy rag-chewing and DX wor! but have always tried to answer direction! CQs that seem to fit skeds and location. but find in return that these same CQs ar of no use to me in traffic handling. While the above figures cover a period of eight months at my station, the log for over a period of two years, shows an aver age of about the same. Another thing that I notice about the gang in general, is that they all will take

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Dubilier- Veteran of Radio “Battles” Y HILE the master minds of radio have fought a hundred wars in their effort to prove the supremacy of one circuit over another, Dubilier has always been ready to meet each new theory and experiment with condensers of correct design, rugged construction and a dependably high factor of safety. These advantages are found today in every condenser marked—Dubilier. Dubilie Condemer ter we wat « The Official Condenser Block for Power Units One of the most important and expensive elements of battery eliminators are the condenser blocks. Play safe and use Dubilier—the blocks ap- proved by such well-known manufacturers as Raytheon, Acme, Thordar- son, General Radio, etc. Sold by all the better radio stores. Circuit dia- grams upon request. No More Outdoor Aerials Rely On Micadon Connect a Dubilier Light Socket Aerial to your A compact, handsome and efficient fixed con- et, plug in, and note the improved reception denser for all small capacities. Moulded Bake- Uses no current, requires no attention and lite case of modern design. Terminals adapted ompletely removes the lightning hazard to serewed or soldered connections. Price 45c¢ Price $1.50. to $1.50. TT aces, The Dubilier Metaleak A tubular grid leak you can bank on for accurate resistance value and noiseless operation. Your dealer has them in all values from 20,000 ohms to 5 meg. ohms. Prices 50c and 75c DUBILIER CONDENSER CORPORATION 4377 Bronx Blvd., New York Say You Saw It In QST—It Identifies You and Helps QST

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Air-Cooled Switching Rheostat combination for all modern eivers. Controls the switch- e set and at the same time uilding up of filament volt- nute increments and holding tly the right point for per- eption. Furnished complete ikelite knob. 2 to 100 ohms. wo Stage Switch Stage Filament Switch is ontrolling the filament, first nd audio stages, with one Turned to left, the switch is center position cuts in the st.ge. Turned to right, h cuts in the first and second tch is specified in many of ng hook-ups. [wo Stage Switch (Volt- Switch Frame _ as _illus- $1.50 get Yaxley Approved Radio at your dealer’s or jobber’s. for our House Wiring Bulletin r Radio Convenience Outlets. YAXLEY MFG. CO. Dept. QO, 9 So. Clinton St. Chicago, Il. from one to three messages and then find that conditions will not permit of the re- ception of any more and after you have a stack of messages and have worked some time trying to raise some one to take them, it sure gets your goat to have a fellow give you an “R8& FB” report, take one or two messages and then tell you, “Ur sigs QSS out OM sori bt nothing more doing CUL 73 NG SK”. On the other hand, it sure makes a fel- low feel good when a QSO such as the fol lowing takes place. “GE OB QSR 24 msgs ur section?” “OK OM oil ur bug es let’s go” The above has happened to me three times in two years and it sure made me think that some of the hams are real ops. Now I’ve recited all my woe for th present but don’t think that I am sore at the gang. Most of them are wonderful fel lows that it’s a pleasure to work. Here’s wishing the directional CQ a lo! of luck as in my opinion, it needs it. L. W. Matteson, 8BMJ-8CJC P.S. Mr. F. C. Dence of 8APK just happened in and read the above. He says, “OK, me too.” Another Suggestion on Keying 118 College Avenue, Northfield, Minn. Editor, QST: Some time ago, I found it was neces sary to change my keying method as m: clicks could be heard for ten blocks around on any broadcast receiver. I had been key ing in the so-called common lead, that lead between the center point of the filament by pass condensers and the filament tap on th: inductance. This is, of course, a place where there is a certain amount of radio frequency energy when the tube is oscillat ing and any small are in the circuit will send out a click. Now, I thought, why not put the key on the other side of the filament by-pass condensers where there should be no high frequency currents and thus eliminate that much cause of key clicks. After this was done, the cussing of the ops at 9AAV, on Key here J indtead ef the other side of the by - SS 7SCTS block away, stopped immediately. All that was left to bother anyone was a smal! thump which was audible on single-circuit tuners (yes, there are some left in this town) two blocks away at the most. In Say You Saw It In QST—It Identifies You and Helps QST

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“STANDING UP BEAUTIFULLY --AS USUAL! A.R.R.L. Radiogram from radio operator VacMillan Expedition. ginoe® opt: s ae . sa0 0%" - \ = ; \ pst= > A | “t= _ “Standing up beau- tifully on twenty meters”—That is what is expected of Cardwell Condens- ers. They are built to stand every strain that commercial or amateur use can produce. YOU CAN- NOT GET BETTER CONDENSERS than Cardwells, for there are none better. | Sent | __———_—_ There is one for every tube and purpose —send for complete specifications. SPECIFICATIONS Maximum 00025 00048 iL ee MIOLILILSISI 141B woecorocoooo Sesuwtwecee ~“ece2ee0c~-Co0c°o seeesseess | Aw Spacing (between Pilate | Number 1 = Depth Capacity | Gap ce Type Stator Plates) | Thickness of Plates | (back of Panel) 0253” | 245" 3" | is” “" 6%" 5%" 104" (Also made to special needs. Write for particulars. Made especially to your specifications. Write for full particulars. FIXED CONDENSERS APMIS Tin Condense “THE STANDARD OF COMPARISON’ Say You Saw It In QST—It Identifies You and Helps QST

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ays ere eee ftw ee te ne ACME CELATSITE BATTERY CABLE \ rayon-covered cable of 5, 6, 8 or 9 vari-colored Flexible elatsite wires for connecting itteries or eliminator to set. iinly tabbed; easy to connect. s set an orderly appearance. Stranded Enameled Antenna — Best outdoor antenna Tact you can buy. Seven tem strands of enameled _ ‘| copper wire. Presents = maximum surface for — reception, resists corro- a sion; this preaty improves the signal. Outside dia- equal to sizes 14 and 16. (We ffer solid and stranded bare, and ed tinned antenna.) Loop Antenna Wire rands of No. 38 bare copper wire exibility, 5 strands of No. Phos- bronze to prevent stretching. nor brown silk covering; best loop possible to make. Flexible Celatsite Wire e of fine, tinned copper * with non-inflammable einsulation. Ideal for nel or point-to- wiring. Strips solders readily. beautiful colors; nly in 25 ft. coils, rtons colored to match contents Acme Celatsite Wire mned copper bus bar hook-up wire th non-inflammable Celatiste in- ition, in 9 beautifulcolors. Strips ly, solders readily, won’t crack at nds. Sizes 14, 16, 18, 19; 30" lengths. Spaghetti Tubing ture, acid proof; highly dielectric eadingengineers. Ninecolors, for » 12 to 18; 30° lengths. (We also ned bus bar, round and square, in ft. lengths.) Send for folder ACME WIRE CO., Dept. S New Haven, Conn. order to overcome this, I shunted a forty watt lamp across the key and was rewarded with a better note and no trace of a key thump. The bulb burns at about half bril- liancy and I found that if I tuned up with it lit, I could tell when the oscillating cir cuit was in resonance with the antenna as this caused an increase in the plate cur rent which caused the bulb to light brighter It is a great help if one has neither a plat: milliammeter nor an antenna ammeter. | am using a 203-A and if a 210 were used the lamp should have a lower rating wit! its accompanying higher resistance. I have been working quite a lot on 2° meters and it certainly sounds funny ¢ hear stations from forty to two hundre: miles away come in with good audibilit: at midnight. oz2AC is a good R8 her most nights. —Paul E. Griffith, 9DBW. Punk Operating 80 Beaconsfield Road Blackheath London, S. E. 3 England Editor, QST: It seems that bum operating is by n means confined to the ranks of the ama teurs although it’s a dead certainty that al! QRM is immediately laid at the amateur’ door by BCL’s, and even by those in au thority connected with the control of th ether. The following are two “gems” picked up tonight over a period of two hours on the twenty-meter band alone. 1. A commercial station pumping out an interminable succession of code groups this in itself is pardonable. After all, busi ness is business. However, the statio had an i.c.w. note which occupied exactly) a band from 22.4 to 23.2 meters and this at DX range! So that everyone could en joy themselves, the designers of this sta tion had thought fit to key it by the spacer and marker wave method! 2. The second hound was a phone sta tion who started well apparently with several kilowatts, and managed to get out. “Hello” a few times. After this it seemed as if the OW got on his track and he went away, but juice must be cheap, because he left the carrier wave on and it’s been on for over half an hour without a break. Per haps, they’ve all been struck dumb, any- way, they deserve it. Yes, the ether sure does want clearing up a bit. Hi! —R. Bloxam, g5LS. Below the Band Dodge City, Kansas Editor, QST: I have been following all the schedules from 9XL this summer, on their Standar‘! Frequency Transmissions and wish to sa) that the number of ham stations below 37.5 Say You Saw It In QST—It Identifies You and Helps QST

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HIGH VOLTAGE FILTER CONDENSERS Manufactured by Dubilier Condenser & Radio Corp. 1% mfd. 1000 volts rated D.C. Working Voltage Extra Special at $1.35 each 7 mfd. 600 volts. rated D.C. Working Voltage Extra Special at $3.50 each | 3.9 mfd. 900 voits rated D. C. Working Voltage Extra Special at $2.70 each | Manufactured by Stromberg-Carlison Tel. Mfg. Co. 3% mfd. 600 voits rated D.C. Working Voltage Extra Special at $1.75 each All of these High Quality Filter Condensers, are brand new, and guaranteed as rated. They are excellent for use in your Trans- mitter, Eliminator or Experimental Work. FILTER CHOKES | ENOTRON RECTIFYING TUBES 50 Henrys—85 Mills. - MFD. BY GENERAL ELEC. CO. These are very efficient These rectifying tubes operate ‘ - on ae filament voltage from chokes for use in Filter 8 to 10 Volts and draw 1% Cirenite for y¥ > Trans. amps. They will safely stand ircults ior your rans % an A.C. input voltage up to mitters, A & B Elimi- - 750 Volts and pass plenty of Pa current and voltage for the nators or Power Packs. j plate of the Transmitting : . Tubes These Choke Coils are — : very well constructed and are made with They are also very efficient 7 . ‘ rectifiers for use in B” Bat- air gaps to prevent magnetic satura- cane fiiniinatenn tion from direct current. STANDARD BASE " ow a NEW IN ORIGINAL CARTONS SPECIAL AT $1.75 Each PRICE ONLY $1.25 Ea. (iy Western Flechtie V.T.2 Tubes (Rated at 5 Watts) Fine for C. W. and Phone transmitting also Power Amplifying tube. Filament 7% Volts. Normal Plate voltage, 350 volts. Oxide coated filament of pure platinum. New and standard base. SPECIAL at $4.50 Each | These Are First Grade Tubes, Not (2nd Grade) Yellow Capped G OUTPUT TRANSFORMERS (1-1 Ratio) MFD. BY GENERAL ELECTRIC Co. Matches Speaker to tubes giving clearer and improved reception and prevents Speaker from being burnt out or demagnetized from high plate voltage. New. List $13.50 Each SPECIAL AT $4.00 Each MESCO WIRELESS KEYS MFD. BY MANHATTAN ELEC. SUPPLY CO. These keys are well balanced, fully adjustable and mounted on wood base. New. List $2.00 each. SPECIAL AT 95> ¢c Each G. E. and Ward Leonard Resistors (Heavy Duty) Fine for Grid Leaks and for use in Eliminators. G.E—5000, 1600, 3200, 4000—(Tapped at 3380), 4000—(Tapped at 2600), 8500— (Tapped at 4250), 1100—(Tapped at 900), 1100—(Tapped at 700 and 800) ohms. W.L.—2600, 7000, 1100— (Tapped at 300 and 400) ohms. The General Electric wirewound resistors will carry 55 Wattsand the Ward Leonard Vitrohm resistors will carry 60 Watts in continuous duty. Your Choice at Special Price of 8c Each | A FEW LEFT iit Vice Finment to Volta.” New. List $2650 cach." ‘Special. $12.50 Ea. AMERICAN SALES CO. 21 WARREN ST., NEW YORK CITY | Say You Saw It In QST—It Identifies You and Helps QST

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PERFECT ley RESISTOR ‘tp Nn disc principle, utilized in the of Bradleyohm-E, assures tepless regulation of plate volt- used in B-Eliminator hook-ups. no tf he bakelite knob, the plate tput of the B-Eliminator can be le ithout steps or jumps, to the for maximum volume. That minent B-Eliminator manufac- idopted Bradleyohm-E. lealer for Bradleyohm-E in tne heckered carton. PERFECT FIXED RESISTOR t d, molded fixed resistor that nd upon hermetic sealing for [t is not affected by temperature > and can be soldered without ste ALO rating. -e-coupling, grid leaks, andothet Try y ELECTRIC eenfield Allen isk your dealer for Bradley: desired rating. “Bradley Co. CONTROLLING APPARATUS Ave. Ca) Milwaukee, Wis. Se meters is entirely too large. This not only spoils our foreign contacts but surely must react somewhat on the opinion of the ama teur outside of the United States, giving us “nu” amateurs something of a black eye Our 40-meter band covers enough ter ritory but these fellows take in even more. I’d like to suggest that all of the am ateurs in the U. S. check their receiver and at least mark the bottom end of th 40-meter band; the band stops at 37.5, no: at 36 or 35. When QSO with any station below our band kindly inform that ham of his fault { have found very few that do it deliber ately, each one makes a guess from the lo cation of the others. When told about it they usually ask me to QRX for a QSY up ward, which I am always glad to do. This is just a suggestion but if we put it into more general practice we will have very few U. S. stations below 37.5, clut- tering up foreign territory. —W. H. Balderston. QS D? 936 Fedora Street Los Angeles, Calif. Editor, QST: To me, one of the most unsatisfactory details in connection with QSL cards, is the failure of the time of QSO, as given on the card, to check with the time of QSO in my log. I, therefore, submit the following suggestion, hoping that it may result in greater uniformity along this line. The scheme is this: To record, at the time of QSO, the moment that the stations make contact. This moment of contact, being, of course, the moment at which the station called answers the station tha called him. When cards are exchanged be tween stations following this system, the dates on the cards and logs are bound to check after allowances have been made for differences in time. It cannot be said of this system that it requires more time or effort than any other method of recording, as every operator has or should have, a clock in his station and his log within reach of his hand. I hope that this suggestion may meet with favorable consideration on the part of other operators. —Charles A. Hill, 6BRO. QSLL 1411% Vista Bird., Hollywood, Calif. Editor, QST: It might interest you to know that after several months persuasion I have finally succeeded in getting the Los Angeles Chamber of Commerce to try the experi- ment of furnishing amateur radio oper- ators in Los Angeles County with free QSL cards. They have just placed an initia! Say You Saw It In QST—It Identifies You and Helps QsT

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AmerTran Push - Pull Transformers are avail- able in these types: Push-Pull Input Type 151 —$15.00 each Push-Pull Output 152 Impedance 4:1 for two UX-210's or similar power tubes —$15.00 each ust I Pull Output Type 271 (Impedance _ ratio 2:1 for tw UX-171 tubes connected push- pull—$15.00 each, Now! AmerTran Push-Pull Transformers STAGE of AmerTran Push-Pull with power tubes, following a first stage AmerTran DeLuxe, provides even greater energy output to the speaker with less dis- tortion than can be obtained with a single power tube. With push-pull amplification, tube distortion and harmonics are suppressed and the slight hum, caused by raw A C on the filaments of the power tubes, is eliminated. Che AmerTran Push-Pull Input and Output transform- ers use high permeability alloy cores with multiple windings so arranged and balanced as to give high inductive coupling and low capacity coupling. The Input transformer, which works out of the plate of one amplifying tube into the grids of two power tubes, has approximately the same primary impedance as the second stage AmerTran DeLuxe. It is suitable for use ahead of any pair of standard power tubes. The plate impedance of two tubes connected push-pull is double the impedance of a single tube. Since various types of power tubes have different values of plate impedance, this company provides out- put transformers of different types to correspond with the power tubes and the speakers which are in most general use. The im- pedance ratios are calculated for the greatest transfer of energy at frequencies from 60 to 100 cycles, because at these low frequencies more energy is required to drive the loud speaker mechanism. AMERICAN TRANSFORMER CO. 178 EMMET STREET NEWARK, N. J. “Transformer Builders for Over 26 Years’”’ Say You Saw It In QST—It Identifies You and Helps QST

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“BY” Eliminator TESTING Problem Solved full value from your “B” Elimi- must know that your “B” lelivering the right amount of letector, amplifier and power nee voltmeters suitable for tteries are worthless for test- minators. This specially de- Resistance Sterling is accu- ; voltmeter is used in your for your own set, it is essen- want the facts about any “B” It is the Universal Voltmeter for the Amateur R-415 voltmeter meets the special he amateur in a variety of testing the output of D. C. , and for every other purpose a high resistance voltmeter. ‘ore has a laboratory instru- available at a price so Sterli R-415 VOL \ laboratory meter at the markably low price of $8.50 lel R-417. A New 150v. Sterling A. C.- Testing A- C. line current and all sits oo eeeees ee THE STERLING MFG. CO. ’rospect Ave. Cleveland, O. order for 20,000 of them. These are not just the ordinary QSL cards but are th finest (and I also think the most expensive) type of QSL cards that will be in circu- lation. Each card is a genuine individual! photograph print. There are a series of five different cards and each card has six different typical views of life and interest- ing places in and around Los Angeles and Hollywood. Those operators in other sec- tions of the country who are QSL hounds will certainly want to push their sets and work a Los Angeles or Hollywood station to get one of the cards to add to their col lection once they see one of them, and then they will want to work several to get th entire series. The experiment is a new one with th Los Angeles Chamber of Commerce and whether they will continue it or not de pends entirely on whether the amateur will go to the trouble to get them and actually put them in circulation. The ecards are ready for distribution and are free for the asking to any licensed oper- ator living in Los Angeles County; they can be obtained from 6BKJ, 1411% Alta Vista Blvd., Hollywood, California, or the Los Angeles Chamber of Commerce. There is no advertising of any kind on the cards I hope when interested amateurs in other sections of the country get one of these cards they will take the matter up with their local business association or Cham- ber of Commerce and induce them to furnish similar cards to their local station oper- ators. —K. N. Ford, 6BKJ. It Is How Far? Goldfield, Iowa Editor, QST: Regarding the formula for calculating distances, which was given in April OST also in the Handbook and I believe it has appeared once or twice in earlier numbers Permit me to suggest a formula which I think is a decided improvement. tan N=cot b sec C tan C cos N tan B= ———_—_—__ cos (a+N) cot (a+N) cos B tan C in wnich a= co-latitude of the place whose distance we wish to measure. b= co-latitude of our own station C= longitude difference. c= the distance wanted in d grees. Now, that looks rather complicated, but really it isn’t if one goes about it right To use it, I first make up a supply of blank forms covering every step of the calculation Then when a distance is to be found, I sim ply take up one of these forms, fill in th Say You Saw It In QST—It Identifies You and Helps QST

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3 New AERO Products You Should Know About! Here are 3 new items recently added to the famous AERO line of transmitting and receiving inductances. Each is built up to the usual AERO high-quality standard and exactly fills an urgent existing need among radio amateurs. Read all about this new AERO equipment so that you can make sure of even better performance by building these new chokes and traus- mitting coils into your new set or substituting them in your present equipment. AERO Key 9018 Transmitter Kit This new AERO Interchangeable Transmitter Kit has a range of 90 to 180 meters. The kit includes two mounting bases ana two Aero Choke 248 coils. This new kit is designed for use in the popular AERO Trans- mitter and is completely interchangeable with the Key 2040 Kit and the Key 4080 Kit, using the same mounting bases and the same choke coils. Every amateur who has built the AERO Transmitter will appreciate the extra work- ing range offered by this new kit. SP SES cas be care tect ans tens Rieke +0ccacniie eeunaeeem ...-Price $12.00 The New AERO Choke 60 Modern circuits of high sensitivity demand the use of radio frequency chokes in certain parts of the circuit. The Aero Choke-60 is designed to have a uniform choking action over a wide range of wave lengths, in- eluding Broadcast bands and Amateur Short Wave bands as well. Many chokes employed on short waves have an unpleasant characteristic of showing so-called “holes” in the tuning range, which is present also on the broadcast band but in a minor degree. These faults are corrected in the Aero Choke-60. New AERO Choke 248 The Aero Choke 248 is especially designed for operation in Aero Trans- mitter kits 2040K, 4080K and 9018K, and other circuits. Aero Choke 248 presents a high impedance or choking action over the usual amateur wave lengths. It efficiently covers the entire transmitter band up to 190 me- ters. It is wound with a conductor sufficiently liberal to handle trans- mitters up to 100 Watts. DEE, CSS Wat hoe naka nce eee ced abe bak co bee cane beak adeeenl $1.50 A NEW SERVICE We are now able to furnish complete Foundation Unit for the Aero Short Wave Receiver, the improved Aero-Dyne 6, the Aero 7, the Aero 4 and the Chicago Daily News 4-Tube Receiver, drilled and engraved on Westinghouse Micarta, at a very reasonable price. These fully finished panels greatly simplify con- struction of these circuits and are a great convenience for the home set builder. Detailed blue print and wiring diagram for each circuit included with every Foundation Unit. Write for prices and complete information. You should be able to get any of the above Aero Coils and parts from your dealer. If he should be out of stock order direct from the factory. AERO PRODUCTS, Inc. Department 16 1772 Wilson Ave. Chicago, II. ! : ; A SAT Say You Saw It In QST—It Identifies You and Helps QST 59 f

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Compare! Model 6-A Browning-Drake tone that of any other pop- now the market. rs will at once appreci- of Browning- on eriority luction. has six tubes, Single ted drum control simpli- Conventional Browning- is used incorporating wning- Drake slot-wound rmer in latest and im- parts are completely binet is beautiful two- Length, 27 , 15 inches; height, 11 tubes and walnut. ‘rice without { Some of you amateurs are TODAY for about handling the e line of factory-built re- Browning-Drake line of not write BROWING-DRAKE CORPORATION IBRIDGE MASS. BROWNING DRAKE necessary figures from map and tables, per- form three simple additions and two sub- tractions and there’s the answer. Compare it with the old formula, where in getting the result as shown, you must multiply five times and add three times. When ore is using five place decimals, that multiplying is a tedious process. Here is what the form I use is like. It is filled out for the distance between Port- land, Oregon and Zanesville, Ohio. Co-latitude a—50° 3’ Co-latitude b—=45° 10’ log cot—9.99747 Longitude difference C—40° 37’ log sec—0.11971 Sum=log tan N=0.11718 N=52° 38’ log cos N=9.78313 log tan C—9.93329 Sum—9.71642 a+N=102° 41’ log cos=9.32902 Difference—log tan B=—0.38740 log cot (a+N)—9.33913 B=67° 43’ log cos B=9.57885 Difference—tan c=—9.7602s c—29° 51’—29.93 log c=1.47611 log 69.04—1.83910 Sum=log distance=3.31521 Distance in miles=2066 Two points in the problem may need ex- plaining. First, when one has found log tan N, he finds several angles having this same tangent. Which to use? Since for our purpose b is always less than 90 de- grees, N will be governed by C. If C is less than 90 degrees, then N is also less than 90 degrees; and if C is between 90 and 180 degrees, so also is N. If one is to apply this to general problems, we have another formula x sin N =cos b x cos N =cot b sec C from which the sign and quadrant of N may be told at a glance without calculation by anyone familiar with Trigonometry. However, one does not have to understand it in order to use the blank forms as shown. The other point is that in using logarith- mic functions, we are chiefly concerned with the decimal part of the log and we add or subtract ten from the integral part as we go along so as to keep the number some where between zero and ten and thus avoid negative logs. I have never seen this formula in a text- Say You Saw It In QST—It Identifies You and Helps QST

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USH-PULL AMPLIFICATION N a search for an amplifier combination which would give the maximum in quality and volume, the push-pull method has proved particularly satisfactory. While push-pull transformer coupling does not increase the amplification per stage, the maximum undistorted power output is greatly increased. The reason for this is that distortion due to tube overloading cancels out, permitting a greater output from each tube than would be possible if the tubes were used as in other methods of coupling. A further advantage of push-pull amplification when using an A. C. filament supply is that hum voltages also cancel out, rendering the amplifier very quiet. The type 441 unit with two type 17! power tubes having a plate voltage of 180 will give more volume and better quality than a single transformer coupled stage using the type 210 power tube with 400 volts on the plate. The General Radio Type 441 unit is completely wired and mounted (as illus- trated) on a brass base-board with conveniently located binding posts so that the unit may be built into a receiver or connected with an existing set as a separate unit. The type 441 may be used with either the UX-226, UX-326, or UX-171, CX-371 tubes. Type 441 Push-pul! amplifier $20.00 The type 441 unit is licensed by the Radio Corporation of America for radio amateur, experimental, and boadcast reception only, and under the terms of the R. C. A. license the unit may be sold only with tubes. Type UX-226 or CX-326 Amplifier Tube $3.00 Type UX-171!1 or CX-371 Amplifier Tube 4.59 GENERAL RADIO Parts and Accessories GENERAL RADIO CO. - - Cambridge, Mass. If you are not located within shopping distance of a dealer stocking G. R. parts, remember that we will ship post paid anywhere in the United States any standard G. R. item on receipt of list price. Say You Saw It In QST—It Identifies You and Helps QST

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Transformers Achieve- ment in A Ampili- fication Nn. Two additions to last year’s Radio Sensation s the most efficient Audio Trans- It carries signals at highest volume litude without blasting or developing erates with all power tubes as well as Output Transformer handles the t of power amplifying tubes, at the tches the impedance of the average tubes. Protects loud speaker unit g plate voltage. res of these two transformers are: nd treated to exclude moisture and electrical surges without breaking magnetic shielding to avoid inter- terminals brought out so as to in- SET BUILDERS! Write Us for the Name of Our Nearest Distributor HIGH FREQUENCY LABORATORIES 133R~—North Wells St., Chicago, UL ra book of mathematics and do not think it is very commonly known even to teachers. | hope it may prove of interest. —R. P. Griffith, 9EJQ Pse QSL 101 Morien Hill, Caledonia Mines, C.B. N. S. Editor, QST: The undersigned are four Canadian hams, who have come to look upon this QSL card business as a crime. We have no particular desire to victimize any nationality, but it is our experienc: that the Americans are the worst offenders in this respect. We liberally estimate that we only re- ceive about one card in return for three sent. This is nothing more or less than false pretense and as hams we strongly resent it. We feel sure that any real ham wil! QSL and others should do so, in order to preserve the high standing ani integrity of the fraternity. Some of the older hams and the high power birds probably don’t need any more cards as wall paper, but they must and should reflect that they were beginner once and cherished these cards and we fee! that they should extend to the newer hams and some of the older ones too, the courtesy of card for card. Trusting that we are not imposing on your time and space, we remain, —J. J. Holmes, nc1BT. —Archie McPhail, nc1DA. —Stanley H. Appleton, nc1DM. —Frank Miller, nc1BR, Backing 597 North James St., Hazelton, Penna. Editor, QST: I just have to write you regarding “Cor- respondence” of 8BMW and 8CBM in the June issue, page 58. This same thing has been in my mind for some time. All I wil! say is that I hope you will wholehearted|: push this to the limit. Amateur phones have their place in radio, but in fairnes to relay men, their place is most certain); not on 85 meters, let alone hashing up the entire band, as many of them insist in do- ing. DXing is on 20 and 40. Let us relay men have at least one band. Mr. F. T. McAllister is backing my sug gestion (re Oct., P. 49) on QSLL, so I must endorse it! I hope he starts it. Hi! I was both amused and surprised at Mr H. B. Richmond’s letter of “Grafting”. | will wager that not 1% of these “beggars” would personally walk in to Mr. Richmond and make these requests. Individual or or ganization, it is time to quit when it comes down to an alms proposition. —H. M. Walleze, 8BQ. gO Say You Saw It In QST—It Identifies You and Helps QST

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LRAT “ONE FIL ’ ase a KER PROTECTION A} i Ito AN ENTIRELY NEW AND UNIQUE HEAVY-DUTY BETTER-B Supplies | A Strictly Heavy-Duty Detector voltages, 22 to 45 adjustable; | Power Unit R. F. voltages from 50 to 75; | Output rating is 70 mils at 180 volts. A. F. voltages from 90 to 135; Uses R. C. A. UX-280 or Cunningham bd — VG THE ORIGINAL Power tube voltage 180 fixed. CX-380 Rectron AS os {VET VERNTER Diy | Licensed under patents of Radio Cor- An Exclusive Feature | poration of America and Associated Tubes and by-pass condensers are pro- Compantes. « . costed autiest enecetive nll iacesiel For 110-120 Volts, 50-60 cycles A. C. ov ay List price with cord switch and plug, $40. Kectifier tube, $5. Designed for lasting service with Write National Co., inc., W. A. Ready, lil 1 factors of safety. Malden, Mess., for new Bulletin 124. Type 7180 A “B’’ That’s Built for Service NATIONAL IMPEDAFORMERS, TUNING UNITS, VELVET VERNIER DIAL, CHARGERS, TONE FILTERS, TRANSFORMERS, FILTERS CHOKES, ETC, IONAL TUNING UNITS.— THE HEAVENLY TWIN ; Unis have been used by set builders chan all aches simular componenss com The OFFICIAL Dengan. BROWNING & eee Fo EVES ty es MAR Say You Saw It In QST—It Identifies You and Helps QST

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GRIDLEAKS tapped at 5,000 and 10,000 ohms watt capacity .. Price, $1.50 1s, 85 watts for UX852 -..-..-.-.---1.50 5 85 watts . nei. oom entadeebotas 1.00 20 watts for cone UX210 ..-.-...- -75 Postpaid 210 TRANSFORMERS ze—Plate winding for full wave rectification, its with center tap at 550 volts. Has two sapped filament windings for UX21!0 and | Wet. 14 lbs. Price $12.50 Plate w inding supplying 750 volts for bridge nter tap. Has two center tapped 7.5 vol UX210 and UX216 B tubes. Wet. 1! Ibs. Price $9.50 Filter Chokes milliampere filter choke, 4lbs. $5.50 milliampere filter choke, 4 lbs. $5.00 ,000 Volt Condensers 346 Double Tank Cond.,3 Ibs., $1.00 3 Single Tank Cond., 2 lbs., -50 Add for Postage TILITY RADIO CO. STREET EAST ORANGE, N. J. * JOM Ad @. I. A. R. U. News (Continued from Page 48) signals were reported R3 steady d.c. and not a single word was missed despite the usual China coast heartbreaking static condition. I have seen a letter from Gabriel Prior, radio officer aboard th Adamaston confirming the QSO. To show that it was not a freak, ac3MA called up xepl1MA again on the 20th of June and again QSOd until 1MA had to break off to keep his schedule with nu6CDK. “One would think that 3MA would glad to save himself the trouble of messing around with plate supply, filters, r.f. chokes, etc. Butno! Such is human nature! 3MA has tasted blood and his last letter to me says, ‘I had my two tube ten-watter going and worked op3AC but I am now setting up a fifty-watt outfit and hope we will be going in a couple of days’.” —G. W. Fisk, ac2FF. FRANCE We have received word from Mr. C. Conte whose lists of “Calls Heard” appear regu larly in QST and who does a great deal of listening in on short waves, states that re ception during the month of August has been deplorable and that he has known nothing like it since 1924. For ten days of the month, no American stations were heard at all while on the other days, signal strengths varied b tween R2 and R3 with the latter intensity as the maximum. The best results were obtained between the 14th and 18th when signal strengths of as high as R5 and R7 were had. All these remarks concern wavelengths between 30 and 44 meters. The 20-meter band is somewhat better and the QRK sticks around R4 to R6 fairly steadily. GERMANY “The main difficulty for the German ama- teurs is in obtaining new licenses. The Postmaster General will issue no new li- censes until he knows what new internation- al regulations concerning amateurs will be adopted at the Washington Conference in October. “In spite of this, hundreds of amateurs are on the air even though they are only using extremely low power (3 to 5 watts) with which they are able to work station all over Europe. Unfortunately, with th: exception of Southern Germany, conditions for DX transmission are very bad as com- pared with those in Holland and England. Some of the southern German stations hav: done excellent work, though. “The General Traffic Management of the D.A.S.D. (Deutscher Amateur-Sendedienst ) is now located in Berlin and after over- coming many difficulties is now operating in a smooth fashion. The publication of the official organ, CQ, which appears monthly is under a large handicap as the men who make it up do so in addition to their usual vocations. However, each issue is better than the last and those who are responsible for it deserves much credit for their efforts. Say You Saw It In QST—It Identifies You and Helps QST

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A

MERSHON CONDENSER Fills and important place in the Elimination of Batteries and the Improvement of Tone Quality A properly designed eliminator will improve any radio set—and can be built in one evening. Mershon condensers will lower the cost and im- prove the quality—as well as enormously simplifying the construction. Orif you buy an eliminator—look for one containing the MERSHON CONDENSER. Paper condensers are often affected by weather conditions, especially dampness and heat, while Mershon Condensers eliminate the hum in an 8 or 9 tube set, produced by an ordinary eliminator. a ; Th ' aa third MERSHO Mershons are not. ey are a : ; } e about one thirc ELECT RIG CONDENSER Mershon Condensers pre- . GaP tor the size of paper con- enor ac mavenrs = a 4 , | cr z vent thumping or > , < 20 wer sunt t ensers of equal capacity. | ee It is possible to connect he j Eliminat AMRAD iminators. << . ly hich DFORD HILLSIDE. MASS They will greatly prolong series for extremely Ss ' cs the life of ordinary B voltage. “motor-boating” of B- Mershon Condensers in ic batteries. Mershon Condensers are ‘%elf-healing, whereas when other forms of condensers are punctured they are useless and must be thrown away. Write today, addressing Desk ST for FULL information, prices, etc. The AM DA) coRPORATION Medford Hillside, Mass.

Say You Saw It In QST—It Identifies You and Helps QST

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“sw CHI-RAD Short Wave Coils 10—40—80 Meter Band -Rad engineers to meet the de- tremely efficient short wave coil. ounting, hardware and three plug-in coils to cover 20, 40 and ands. These coils are noteworthy ence in design, neatness in ap- turdiness in construction. All contact. t Wave Coils Complete for 20, 40 r barn $10.00 adcast band t-builders—write for Gusher ago Radio Apparatus Co. Dearborn St. Chicago, Ill. a HAMS or transmitting ~~ pramna . - $8.89 oupling rods, complete. each neter transmitting coil kits . * $9.70 tm. S. W. Receiving coils . each Sombined plate and fil. Mtr: .20 formers; 650 v. plate and 71!/ fil. winding, mid-tap . Sv. with midtap . and 650 v ~ and 1600 v. nid ten. sh mounting AC or DC voltmeters, $5.95 ammeters any tcale readings . meters, any sealereading . $9.80 New tvpe Condensers T 199 .00085 mfd cond. T 183 B _ . $g.90 7 B .00045 each re General Flectrie ease 1.45 Ward-Leonard Cent. tap'5000 ohm 245 Ward- eonard Cent. tap ste chen & 3s: so t Lavite 5000 ohm spec‘al ° 2.20 FIXED CONDENSEPS 62 mfd. 500 volt . 50 %, MWOvolt . . x 1.50 1., 6000volt . : , 75 fad 1000 volt ° fd 1000 volt nfd one) volt ° . mfd 20 0 volt . : imfd 2000 volt 6.95 ~ondensers are guaranteed against break ndenee rs will be promptly replaced without ARD SOCKETS For 202s, 2its, ete. GS TE TRANSMITTER KITS for beginners ete information on request. N ATIONAL- FLECHTHEIM- PARVOLT-HAMMAR- WE-PYREX - GENERAL RADIO-ALLEN-BRADLEY Money Bac »west Prices Ever Seld. k Guarantee. RADIO 2MA COMPANY hington St New York City “Unfortunately, the Berlin amateurs who all codperate in the running of the H.V.L. (General Traffic Management) have been so busy with ‘hat organization that they were unable to spend much time with their sets.”’ —Dr, Kofes, ek4 ADE, General Traffic Manager. AUSTRIA According to a decision of the Oester- reichischer Versuchssendererverband (Aus- trian Amateur-Transmitter League), all QSL cards for Austrian amateurs are to be sent only via Radiowelt, QSLL Bureau, Wien, III., Ruedengasse 11, Vienna, Austria This QSL address will be referred to over the air by the code lettters “RW”. It is re- quested that all take note of this and govern themselves accordingly. WAC It is most interesting to know where the “centers of population” of the membership of the club are located. An analysis of the list of the members as regards their geo- graphical location brings to light some facts that would be expected and also several that were unsuspected. As is expected, the United States cf America has approximately half the mem- bers within its boundaries. Of these fifty- six members, eighteen are in the sixth dis- trict; nine in the first; eight in the second; 6 WAC MEMBERS SP " 123456789 US Dustricts x BS & Mt districts Stuth Africa, jenn _ “ippunes — > a : seven in the ninth; six in the fifth; five in the seventh; two in the fourth; one in the eighth and none whatever to represent the third district. Why is the third district so backward in coming forward? Surely, at least one of the many active stations in that district must be interested enough in foreign DX to have made a try for mem- bership. And for that matter, the eighth district isn’t so far “out of the mud” that they can afford to do any loafing on the job. Looking at the other end of the line, we find the sixth district head and shoulders above its nearest competitor. One possible reason is that the most difficult contact Say You Saw It In QST—It Identifies You and Helps QST

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Transformer (Or RCA Tubes- S102] A at *~— — > & a - > ~~ =~ oo P-2D0 AMPLIFYING HeavyD Rectifier Supple s Cn i oo » T2445 Gi Patio. #44° 6 lRatia+4%¢ TRatio.* 42 &: I Ratiarx492 ‘TRatia*6 co 21 Batin #5% nin) Cy : mn, SS =F oa : —— SS m7 m — THORDARSON RADIO | a ERS Sup preme PLL LO) LU MMT Musical cDertor mance Ss Y FOR SALE AT VVOREDOULEOORE LOADED EUAN ORLUEAOU A CraatanE - 4 fou Saw It In QST—It Identifies You and Helps QST 5)

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1 ee oe ee GALVANOMETER of wae MINIATURE instrument, for use in bridge testers, vacuum tube volt- eflection of needle is obtained Type 510—$13.50. for table use, of polished nal strip and binding posts- HOYT catalogue—‘“Service Meters | | BURTON-ROGERS CO. co. Sole Selling Agents Boston, Mass. Send the EASY Way With The Improved ove VIBROPLEX For Continental or Morse Code Any speed from 10 words per minute-up d easy to operate. Simply press e V ihroplex does the rest. Adjustable mn 10 words per minute up. Saves cramp and improves sending 50 0,000 users. No station com- up-to-date BUG. | Special Radio Model | Extra Heavy, Specially Con- Points to break high current elay. Sent anywhere on receipt of rder or registered mail. $25 e on old Vibroplex. the Genuine Improved Martin The Vibroplex Nameplate is tion. Order NOW! V IBROPLEX CO.. Inc. )ADWAY NEW YORK iddvress: “VIBROPLEX” New York for the “6” is Europe which being well populated with amateur stations offers many possibilities for QSOs. On the other hand, the biggest jump for the eastern sta- tions is to Asia, a continent having com- paratively few stations and many troubles as far as getting QSL cards thru is con- cerned. After all, the much _belabored QSL card is the only means by which we can check up on claims of having worked all continents and even if a difficult con- tact is made, it doesn’t mean a thing to us unless the card is at hand to prove it. As “in betweens”, the first, second, ninth, fifth and seventh districts hang well to- gether and it would be expected that the fourth district being a small one would not be in a position above that which it holds. However, it cannot be denied that this list is somewhat of a “shock” to most of us. When viewing the location of those mem- bers not within the boundaries of the U.S.A. we run into some more “upsets”. Great Britain and Northern Ireland lead with a total of fifteen members. Second place is held by South Africa and (now for another upheavle) the Philippines who tie with five members each. We then find Uruguay with four and New Zealand, Chile and Belgium “neck and neck” with three members each. Then comes Italy with two members and (another surprise) Australia with only the same number. Those countries boasting of only one member each are Canada (don’t ask us why), Porto Rico, Straits Settlements, China, France (another mystery), Jamaica, B.W.I., Ger- many, India, Brazil, Argentina and Chile. If anyone asks us why the A, B, C States haven’t any more members, we'll bite! We really couldn’t refrain from making up one of those graffic charts showing the facts stated above. They show contrasts so well. The following is a complete list of mem- ber stations and if anyone has been omitted or any error of any sort made, it would be appreciated if it is called to our attention. nu6O0I, nu6HM, nulAAO, nce4GT, mnp4SA, nu9ZT-9XAX, eb4UZ nu9DNG, op3AA, nu2APV, oplAU, nu5- ACL, nu5JF, eg2IT, eg-gi5NJ, op1CW, fol- SR, nulCMP, nuICMX, eb4RS-3AA, nu7- IT, nulCH, sc9TC, nu5TW, nu6CTO, op1BD, nu9BSK, nu4SI-4TN, am-vs-ss2SE, eg5X Y, sc2LD, ef8CS, nu2CRB, oa2SH, nu- 7VH-7TM, nu2MK, nu2AHM, nu2CYX, su2- AK, sulBU, nu4BL, nu9BHT, nu6ZAT, eg5- SZ, nu5QL, nu8ALY, egiMA, foA5X, nul VC nu6VZ, nu6CCT, nu7EK, eg6TD, sc2AS, nj2PZ, nu6VC, nu9ARA, eg2QB, ek4U AH, nu5AQ, nulALR, oplHR, ai2BG, eg5BY, nu6CKV, foA3Z, eg2NH, eg5KU, ac8HB, nulPY, nu6NX, nu6CDW, oz4AO, oz3AR, nu7DF, nulAZD, foA3X, eg5UW, eilGW, nu7KB, oa2RC, eb4BC, sb2AS, saGA2, nu7- RL, nu9CCS, foA4L, nu6BUX, sulFB, eg5HS, nu2APD, eiIRM, nu6AZS nulON. eg6YD, eg5 YK, nu2GX, nu6BJL, nu5AUZ, nu2MD, nu6DFE, nu6AOI, sulCD, nu AEK, nu6CAE, nu6AM and 0z4AM. As may be noted, Don Wallace is th« Say You Saw It In QST—It Identifies You and Helps QST

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No. 524 Stromberg - Carlson A.C. Receiver. Art Console Coils shielded. Equi with new Audio-Power Unit con- taining audio-output system and supplying all “A,” ““B"’ and “C” voltages direct from house light- ing circuit. Operates from an- tenna. Equipped with Volet- meter. Jack in panel for magnetic phonograph pick-up. Mahogany. Price, with Audio-Power unit and 8 R.C. A. Tubes—but not including ConeSpeaker, East of Rockies . . . $425.00 Rockies and West . . 455.00 Eastern Canada . . . 565.00 No. $02 Stromberg - Carlson Universally Powered Receiver. Similar Cabinet. For use where 60-cycle current is not available. Price, including tubes, but noe including other accessories, East of Rockies . . $303.75 Rockies and West . . 328.75 Eastern Canada - « 355.25 \\ (S47 Nl Making Radio Simple and Sure baa batteries— without acids or liquids, the new A.C. Stromberg-Carlsons are utterly free from the need of attentién—always ready to be placed in use at the turn of a single switch. Having the unfailing power of the house lighting circuit to supply the “A,” “B” and “C” voltages, they operate at all times with maximum efficiency. Furthermore, every Stromberg-Carlson A.C. Re- ceiver has a wonderful new feature; note-worthy achievement of the Stromberg-Carlson Laboratories— it is arranged so that it may be used to play phonograph records through the audio system of the Receiver and the Cone Speaker. To be “up-to-date” in Radio you should get a Stromberg-Carlson A.C. Receiver. Stromberg-Carlson Telephone Mfg. Co. Rochester, N.Y. Stromberg-Carlson Makers of voice transmission and voice reception apparatus for more than 30 years Say You Saw It In QST—It Identifies You and Helps QST 69

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Have you seen the new Balkite “A”? ] es “A” batteries and sup- I lio current from the light & Itcontains no batteryinany form. It operates only during recep- t It is available either alone or c ned with Balkite “B” in a c te radio power unit. Ask y ealer. Fansteel Products ( y, Inc., North Chicago, Il. Balkite ‘Radio ‘Power Units ~ =~ SS 4 SILVERPLATED! now all SILVER PLATED—a ement. Silver has less than \4 nickle used in other inductances. i No increase in cost! Single Coupled Coil Unit {0-80-160 meters $5.50 $12.50 r 20-40-80 meters 11.00 ips EXTRA, each .... 20 rtant Announcement! f transmitting filter condensers is y rated at WORKING VOLTAGE, ltage, and priced as low as it is trietly first class condenser. [AMALOG is about ready. Get your free | Ham Catalog. JOHNSON COMPANY WASECA, MINNESOTA only one to have a membership for stations located in two U.S.A. districts. He first obtained one with 9ZT-9XAX and then later on the Pacific Coast with 6AM. Congrats and FB! QRA A few new QRAs have been received and are given herewith: ek4SAR—J. Kroom, Wackelberchtrasse 6, Saarbrucken, Germany. 33 meters, a.c. (by 2CUQ) fll1AB—Gov’t Station, Monrovia, Liberia West Africa, operated by Sydne McCaleb and Mr. Osier. 34 meters, d.c. (reported by 3MV, 4SH-4JV and 4SI-4TN) ngML—Guatemala, C. A., (by nulAJD) Any more information? xoa5MA—Barkentine E. R. Sterling, c/o Berry Barclay Co., 88A Leaden- hal St., London, England. 500 cycles, 32 meters. (by 3MV) XC51—Army station, Mexico City. (Aviation Dep’t.) XC52—Guadalajara, Jalisco, Mexico. XC55—Estacion Ortiz, Sonora, Mexico. XC61—Estacion Cajeme, Sonora, Mexi- co. XC66—Magdalena Bay, Lower Califor- nia, Mexico. XC67—Guaymas, Sonora, Mexico. XC68—Topic, Nayarit, Mexico. The abov “XC” stations are all of the Mexican Army. (by 6AM) QSL SECTIONS Austria—Radiowelt, QSLL Bureau, Wien, II, Rudengasse 11, Vienna, Austria. Belgium—Reseau Belge, QSL Section, 11 Rue du Congress, Bruxelles, Belgium. China—c/o H. B. Wilson, P. O. Box 266, Shanghai, China. (Under cover) Czechoslovakia—Ceskoslovensky Radioklub, Praha II, Slovansky ostrov 5, Czechoslavakia. (Under cover) Esthonia—Mr. Olof Leesment, Parnu, Aiatan 6, Esthonia. (Under cover) France—Robert Larcher, 17 Rue Fessart, Boulogne-Billancourt, (Seine) France. Germany—Deutscher Funktechnischer Ver- band, QSL Section, Berlin W. 57, Blumenthalstrasse 19, Ger- many. India—R. J. Drudge-Coates, Cambridge Barracks, Rawalpindi, India. Ireland—Irish Radio Transmitters Society, Solent Villa, Kimmage Road, Terenure Co., Dublin, Ireland. Italy—Associazione Radiotecnia Italiana, Viale Bianca Maria 224, Milano, Italy. Great Britain—Radio Society Great Brit- ain, QSL Section, 53 Victoria St., Westminster, London S.W.1, England. Say You Saw It In QST—It Identifies You and Helps QST

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“IT know because I use them” Men actively interested in Radio manufacture and trafic are familiar with the many applications of Faradon capacitors and know that the product of the Wireless Specialty Apparatus Company can be de- pended upon to give unvarying, long-lived service. They know that the twenty years of Radio Condenser experience has produced in Faradon a product they may specify and recommend with perfect confidence. Units in regular production will take care of most requirements. Our engineers will be glad to advise with you regarding any unusual condenser problem. WIRELESS SPECIALTY APPARATUS COMPANY Jamaica Plain : Boston, Mass., U.S.A. Established 1907 Electrostatic Condensers for All Purposes 1282 Say You Saw It In QST—It Identifies You and Helps QST 71

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NENTAL. The TELEPLEX is the only PRODUCES actual sending of expert *. radiograms, ete.—5 to 80 words Saves months of tiresome me as many words with one ment, and six are furnished. ‘ Used by U. 8S. Navy. Fully NOW for FREE literature Dealers Wanted rELEPLEX Co. Build this set 1 it at aaive thrill ’ at vmediatety sasisierage SS, to RADIART LABORATORIES alte Street company PACENT DUO-LATERAL COILS ACENT Duo-Lat- eral Inductance = Coils are specially de- | for laboratories, ineers, ex- enters, as well as for special are “Headquarters” for Duo-Lateral s and carry a complete line of all ndard turn ratios. » for information and prices. Pacent I hasta Corp., 91 Seventh Ave., N.Y.City Netherlands—I.A.R.U., Hoogduin, Noord- wijk, a/2, Netherlands. New Zealand—New Zealand Association Radio Transmitters, Box 733. Auckland, N. Z. Portugal— Rede Emissors Portugezes, Tenente Eugenio de Avillez, 15 Costa do Castello, Lisbon, Portu- gal. Spain—Association EAR, Mejia Lequerica 4, Madrid, Spain. Sweden—Foreningen Sveriges Sandara- matorer SSA, Svenska Radeao- klubben, Hamngatan 1 A, 3 tr., Stockholm, Sweden. Uruguay—Casilla de Correo 37, Montevi- deo, Uruguay. If those associations maintaining QSL sections which are not listed here will send us a card to that effect, their names will be included in the next list to appear. Notice concerning errors or changes in the status of any of the organizations listed above would also be appreciated. trays . A simple switching arrangement whereby the filaments of the tubes are turned on be- fore the plate voltage is — is given by George P. Taylor of 9BAN “The parts needed are a d.p.s.t. and a s.p.s.t. battery switch and two brass strips 3 3/8” by 3/8” by 1/16”. The switches must be of the type that have the movable blade held by a bolt rather than by a rivet. “The arm is taken off the s.p.s.t. switch and the contact posts turned around a one- quarter turn. The blades and handle are oO removed from the d.p.s.t. new brass strips are fashioned after the switch and the old ones. They are, of course, longer, and are bolted to the contact posts in place of the old ones. The handle is also bolted to them. The converted s.p.s.t. switch is placed in front of the d.p.s.t. one and with the switch closed, both are screwed to the table. The illustration shows the wiring arrangement.” Say You Saw It In QST—It Identifies You and Helps QST

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Warning! There is still a great deal of misleading adver- tising appearing in the public press’ on radio. Unscrupulous advertisers take advantage of the fact that the vast majority of the public is un- versed in the technical side of radio. Following the popularity of Battery Eliminators, manufacturers and dealers saw the advantage of selling sets complete with power units; then there are the new A C tube sets equipped for use with a B-Power Unit and a Transformer for the “A”’ side. Many advertisements of the above popular “All- Electric Radio Sets” carry such statements as: “No Batteries, No Eliminators, Your Light Socket Supplies All Power” Such statements are absolute falsehoods and are unfair to honest advertisers. No electric radio set has ever been built or marketed which does not require a so-called “B Battery Eliminator,” better termed a “B Current Supply” or “Power Unit.” The current as it comes from the light socket is totally unsuited to operate any radio set without the use of power units. Buy your new electric receiving set and power unit, therefore, from manufacturers and dealers who tell the truth. This advertisement printed in the interest of fair trade by GRIGSBY-GRUNOW-HINDS CO., Chicago, Manufacturers of Majestic Electric Power Units. Say You Saw It In QST—It Identifies You and Helps QST

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SANGAM 1\O TRANSFORMERS Ln rove the best receiver » Transformers give more realistic f bass notes than any other trans- o sacrifice in the highest tones or thin the musical range. ff above the musical range minimizes » oscillate at high frequencies. It f the acing —uhiethen, high fre- frequently encountered in radio nielded. Tested for breakdown at »00 volt d.c. Intended for use e in last stage. fet price, 7 o 1 ratio 10 neers are accurate and stay accurate. SMO ELECTRIC COMPANY RINGFIELD, ILLINOIS X-LProducts ccurately—eliminate noises Uation—with X-L vAMIO DENSERS in st and best circuits specify and endorse. sijustment easily made, assures exact ned radio frequency circuits, Neutrodyne, Drake Silver's Knockout. Capacity Price $1.00. pergrid capacity on Cockaday circuits, rency tuning in super-heterodyne and Capacity range, Mid. Model G-5 G-10 .0003 to .001 orid clips $1.50. o wn with your : ire, wire is will not loosen, re- each 15e k panel marked in x of wiring dia- mits in the new 0 upled dio fre- —~ 4 Tese-one. X-L PUSH Wr POST X-L RAT RATORIES, 2428 No. Lincele Ave., ve., Chicage, i. Genuine Bakelite Panels 6" Thick, Color Black ce $29.00, Special at $9.85 per pane -e $21.00, Special at $7.25 per panel Sales Go., 21 Warren St., HY. 6. 38x4 30x3 Americar Northwestern Division Conven- tion QO: September 2nd and 3rd Spokane was the center of ham activities in the Northwest. Every state in the Division was well-represented by delegates and there were a number of visitors from the out- side in addition. There was something doing every min- ute from start to finish. In between the interesting meetings and talks the gang operated local ham stations or visited the “shack” of the Radio Operators’ Club to operate or talk. There were trips to the Telephone and Telegraph building, to broad- casting station KGA, to the aviation field, and to the plants of the Washington Wate t Power Co. Features of the convention were an en- joyable traffic meeting, a red-hot business session (at which it was decided to have the next A.R.R.L. convention at Seattle), a showing of a movie of A.R.R.L. Eead- quarters, an interesting talk on radio inter- ference by T. W. MacLean of the Washing- ton Water Power Company, and a banquet with many unusual entertainment features and honored by the presence of Senator Dill, author of the Senate Radio Bill. Howard Mason’s first-hand story of radio work and adventure in the arctic was especially thrill- ing and interesting and will be long-remem- bered by all. After the distribution of prizes generously contributed by manufac- turers the gang were not ready to break up so a blackboard was obtained and follow- ing another technical session with a gen- eral discussion and talks by Mason and the writer the delegates bid each other good-bye until next year except for radio schedules. —F’, E. H. Strays *) 5ACL tells us that the Faradon, 1750- volt filter condensers are made in two sec- tions and that when one of these blows, the can may be ripped off and the bad sec- tion cut out of the circuit. By screwing General Radio plugs into the threaded inserts in the Sangamo con- densers, a good plug- in-grid-condenser may be had. A small piece of bakelite can hold the jacks for it and the grid leak mount ing clips. WHAT HAS EIGHT LEGS AND BROAOCASTS? 74 Say You Saw It In QST—It Identifies You and Helps QST

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Announcing ANOTHER REG. U.S. PAT. OFF IMPROVEMENT hk ELKON CHOKE COIL Plenty of reason for calling it an “improvement,” not just another choke coil, for it possesses substantial advantages you will be quick to recognize. For example, it is used, with its charger, ONLY DURING RE- CEPTION, having ample capacity for supplying undiminishing fila- ment “A” power up to full capacity of the charger. Here are both econ- omy and convenience. Connected up with full wave rec- tifier it will provide filament “A” power of uniform high quality with any good “A” battery. it’s new, and your dealer may not have it in stock, bat he will gladly order it for you, or we will send direct. The Elkon Choke Coil $6.00 made by the manufacturers of ELKON TRICKLE CHARGER The original silent bone dry Trickle Charger. 1 amp. ca- pacity. Tapers automatically. ELKON “A” POWER Flawless filament “A” Power Instantly. No liquids, tubes or moving parts. ELKON 3 AMPERE CHARGER The silent rugged rectifier. Bone Dry. Recommended for use with the Elkon Choke Coil. Say You Saw It In QST—It Identifies You and Helps QsT

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THE NEWEST ABC POWER SUPPLY UNIT used with RCA 226 and 227 AC tubes and the Ratheon BH tube No. 5552 $20.°° List This latest. develop- ment of the Don- gan laboratories combines in one small, compact case the essential trans- formers and chokes A 226 and 227 A C 30 X 171 power amplifier on BH Rectifier Tabe. Com- secured, eliminating the charger. RC A 226 and take the place of standard mation write to Dongan labora- ealer cannot supply you send ler direct. Electric Manufacturing Co. 1001 Franklin St., Detroit, Mich. BO this s famous Cabinet THE BLUE RIDGE your order or or ite te or Walnut Finish 7218x10'' Maboga: catalog and full information. y Co inc. I turers fackory N.C Improves Reception a table clamp s through the out- right into rneath—-you etal con- Price te any address in U Window Lead-tn, 25e today E. & M. Radio Supply Co. 3028 McKinley Bivd.. Milwaukee, Wis, 'SUPER-GROUND CLAMP STATEMENT OF THE OWNERSHIP, MANAGE- MENT, CIRCULATION, ETC., REQUIRED Ry THE ACT OF CONGRESS OF AUGUST 24, 1912 Of QST, published th cata ta monthly at Hartford, Conn., for County of Hartford ) State of Connecticut } _ Before me, a Notary Public in and for the State and county aforesaid, personally appeared K. B Warner, who, having been duly sworn according to law, deposes and says that he is the business mana- ger of QST and that the following is, to the best of his knowledge and belief, a true statement of the ownership, management (and if a daily paper, th circulation), etc., of the aforesaid publication for the date shown in the above caption, required by the Act of August 24, 1912, embodied in section 443, Postal Laws and Regulations, printed on the reverse of this form, to wit: 1. That the names and addresses of the publisher, editor, managing editor, and business managers are: Publisher, The American Radio Relay League, Inc., Hartford, Conn.; Editor, Kenneth B. Warner, Hart- ford, Conn.; Managing Editor, F. C. Beekley, Hart- ford, Conn.; Business Manager, Kenneth B. Warner, Hartford, Conn. 2. That the owners are: (Give names and ad- dresses of the individual owners, or if a corporation, give its name and the names and addresses of stock- holders owning or holding 1 per cent. or more of the total amount of stock.) The American Radio Relay League, Inc., an association without capita] stock, in- corporated under the laws of the State of Connec- ticut. President, Hiram Percy Maxim, Hartford, Conn.; Vice-President, Chas. H. Stewart, St. David's Pa.; Treasurer, A. A. Hebert, Hartford, Conn.; Communications Manager, F. E. Handy, Hartford, Conn. ; Secretary, K. B. Warner, Hartford, Conn. 3. That the known bondholders, mortgagees, and other security holders owning or holding 1 per cent or more of total amount of bends, mortgages, or other securities are: (If here are none, so state.) None. 4. That the two paragraphs next above, giving the names of the owners, stockholders, and security holders, if any, contain not only the list of stock- holders and security holders as they appear on the books of the company but also, in cases where the stockholder or security holder appears upon the books of the company as trustee or in any other fiduciary relation, the name of the person or corporation for whom such trustees is acting, is civen; also that the said two paragraphs contain statements, embracing affiant’s full knowledge and belief as to the circum- stances and conditions under which stockholders and security holders who do not appear upon the books of the company as trustees, hold stock and securities in a capacity other than that of a bona fide owner; and this affiant has no reason to believe that any other person, association or corporation has any in- terest direct, or indirect in the said stock, bonds, or other securities than as so stated by him. 5. That the average number of copies of each is- sue of this publication sold or distributed, through the mails or otherwise, to paid subscribers during the six months preceeding the date shown above is This information is required from daily publications only.) K. B. WARNER. Sworn to and subscribed before me this Ist day of October, 1927. Caroline S. Crisman, Notary Public. (My commission expires February, 1931.) Ww w WwW THE OLD SPARK SYSTEM WASN'T So BAD Say You Saw It In QST—It Identifies You and Helps QST

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5 Panels For Magnaformer and Other Kits Formica is supplying handsomely decorated and drilled front and sub panels for the Magnaformer Circuit ; also Tyrman front and sub panels, H.F.L. new hook-up; Karas new hook-up; World’s Record Ten, Cam- field Nine and Camfield Seven. Other kits for which Formica panels are available are Madison-Moore; Melo-Heald, Victoreen, St. James and Infradyne. These panels enable the home constructor to build a set equal in ap- pearance and efficiency to the best manufactured receivers. Sold by leading dealers and jobbers everywhere. The Formica Insulation Company 4620 Spring Grove Avenue Cincinnati, Ohio Formica has a come- Any parts dealer or plete service on insu- jobber can get Form- lating parts for the ica panels for you. radio manufacturer. é | | Say You Saw It In QST—It Identifies You and Helps QST

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wy nut The Rocky Mountain Division in — Convention

ITH “Roastmaster” Paul M. Segal in full charge the second annual con- vention of the Rocky Mountain Divi- sion was called to order at the Hotel Argonaut, Denver, Col., Friday, August 26th, : : and from then on till ‘the closing late Sat- Oscillation urday night every minute was filled with meetings or entertainments. — Forever! Ray Stedman, 9CAA presided over the Traffic Meeting, where good speeches were made by Communications Manager Handy from A.R.R.L. Headquarters, M. O. Davis, Pi ASATROLS 9CDE, of La Junta and T. A. La Croix, 9DKM, and the first day ended with a ahtert “Weenie Fry” way up in the mountains Patented 7-27-'26 which was much appreciated by all pres- ; ent, and especially the Y. L.’s. (Yes, Denver ee Se is a place where the Hams are not afraid ge ME to bring out the Y. L.’s and O. W.’s). eliminate the squeals of 7 ? S ations can you know what Good technical information was present- n is possible with your set. ed on Saturday by Glen Earnhart, 9CHV; R. F. oscillations, not H. M. Williams 9BXQ, Mr. Bonnelli of the > aa — <- ion Western Union and F. E. Handy and it was Ask your dealer. Price $2.75. one of the best meetings. for free heoh-up circular fer While this Division is not large numerical- any set or cireuit ly it has the proper spirit as was well demon- 17S Varick Street, New York, N. Y. strated by the good percentage in attend- ance and the whole hearted way in which = A 1D) the gang took part in the different contests, and after a real to-goodness-banquet for the closing event the dhegates! tin whistles were heard sending CUL next year.

DEPENDABLE! “B” BATTERY POWER! ——- The November Tests (Continued from Page 39)

turned by a small rubber friction disc on a separate shaft as shown in the Lidbury wavemeter shown in one of the illustrations. The paddle is held in one hand and the small knob on the extra shaft turned with the other. This is a convenient rig for any small wavemeter. ones call pupgnanes mae Se indicated by the usual 00 VOLT EDISON ELI A -DESTRUCTIVE “click” met when working on a receiver, Shea RGEABLE "'@ BATTERY Wits CHARGER by reaction on a meter when working with 140 VOI ITH CHARGER $17. a transmitter or by a small lamp soldered to a 100 Volt VER UNIT. with TUBE . 1” turn of wire, the whole thing being hung Ouush et by 3 threads inside the single-turn coil of the REDUCED PRICES wavemeter. Better make up several of these built to your specifications. indicators while the soldering copper is hot sO unented a6ta —also buy the lamps by the dozen. | BATTERY “COMPANY NEW YORK CITY HERCULES AERIAL MAST iup. We pay the freig All steelconstruction. 20 to 0 ft. bigh. Roof or earth \ type complete with guy . wires,mastheadpul- 4

P< ley ete. Write for full ‘ ==. details, $.W.HutiCe. Dest.6 ‘ ~ 2048 E 79th St., Cleveland, Ohie DRILLING YOUR PANELS Say You Saw It In QST—It Identifies You and Helps QST

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_ —— === BEGINNER'S TRANSMITTING oat TRANSMITTER INDUCTANCES - SOWATT SOCKET WAVEMETERS R.E.L’s. NEW Waa NOT TO BE HAD AT TRIPLE THE PRICE ELSEWHERE!! FOR AMATEUR AND BCL USES This is an ideal popularly priced wavemeter embodying the following exclusive features. . Handsomely finished, totally shielded metal cabinet that may be grounded. . Precision calibration from Quartz Crystal frequency standard. 3. Each instrument individually calibrated. . Neon tube gives sharp resonance indication. (Ordinary flashlight lamp not used) 5. Coils wound on grooved bakelite forms. . Dial scale engraved on panel. Indicator dial securely locked on condenser shaft to prevent possibility of loosening. . Large, very legible curve chart. Wavelength ranges:—Coil No. 1: 15-55 meters Coil No. 2: 45-160 meters Coil No. 3: 150-550 meters A real wavemeter built in a cabinet, always at your service, year in and year out. REL owns and operates experimental Station NU2XV on 15.1, 30.2, and 60.4 meters Radio Engineering Laboratories 100 Wilbur Avenue, Long Island City, N. Y. am, & BH t coum “wy rx TT . # 7? wave OE FOREST *# 0 WA UOX- P52 PECIAL SHOR REL CHOKE CO/L rons - COUPLED WARTLEY TUGE HOLDER Co/L AIT Say You Saw It In QST—It Identifies You and Helps QST 79

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DUO-POWER 6B Current Supply y higher west of the Rockies. i and dependable in operation t improvements in B Power eiver requiring up to 180 to install. Fixed resist- of proper voltages for ELECTRIC COMPANY Minneapolis, Minn. tnd Service men — User agents y attractive agency proposition. ITIN ORDERS FILLED PROMPTLY RNR THE FOLLOWING 1 M. F. Condensers. Tested for for B Eliminators and Filters, $2.00 11 Coils 750 to 1500 turns yuunted 50 Soldering Irons 95 1.25 Tested for 500 Volts 85 formers. Per pair 2.50 lransformers i wound tuning coils ransformers each—two for able Condensers Terms: with order, Balance C. O. D. r to be paid by customer. 57 Bowdoin Street, Dorchester, Mass. Quali ty Amateur Apparatus ory Products are Quality Built for Tr nd iesendiell We supply Trans- mitt ne or C. W. Receivers of the Thre e Designs with Wavelength Range f Our Speech Amplifiers are We also make fron Meters supI t or Remote Control. and meters, Inductances, Choke Coils, ete for Nationally known Microphones, Trar Reactors, Motor Generators, etc. We | ne your parts if desired. Prices ENSA RADIO LABORATORY 1708 Warren, Ohio Marine “Pione tullders of Shert Wave Apparatus” adview Ave. Amateur Broadcast Kansas State Midwest Division Convention NDEPENDENCE, Kansas was the meet- ing place for Kansas amateurs on Sep- tember 9 and 10 and again there were sev- eral delegates registered from Oklahoma and other points outside the Division. Ex- cellent talks were given, provoking a thor- ough discussion on the various points raised. Club organization, traffic handling and in- ternational communication, mercury-arc rectifiers, and constructing a crystal con- trolled transmitter were the subjects han- dled by Mr. J. H. Amis, 9CET; Mr. Fergus S. McKeever (S.C.M.), 9DNG; Mr. G. I. Jones, 9AEK; and Mr. J. B. Fronkier, 9DIH. Some important facts were brought out at the traffic and technical meetings conducted by the C.M. who was Headquarters’ repre- sentative. The International Radio Confer- ence and the Portland, Ore. and Wilmore, Ky. ordinances were discussed informally. After a roof-raising banquet and the dis- tribution of prizes won at the various con- tests the gang dispersed after another of those friendly get-togethers for which the Midwest is so well known. 9OW won the prize for YL’s showing how little call letters sometimes signify. 9JU and 9BUY, Presi- dent and Secretary of the Imperial Brass Pounders’ Club, were very much in evidence and a vote of thanks was given them and the Club for the fine time arnt > by all. —F. E. H. Amateur Radio and the Pacific Flights (Continued from Page 41) airplanes on long-distance flights. The sig- nals of KGGA were at all times easily readable. They were copied all up and down the West Coast, in Hawaii, generally throughout the United States, in New York City, and in Italy. The last- named, it is believed, establishes a record for radio transmission from _ airplanes. When it is remembered that only a single fifty-watt tube was employed, and that the plane most of the time was fairly close to the surface of the water, the work must be considered as phenomenal. The second lesson, and perhaps an equal- ly great one, is that of the value of the American amateur to the Government, to the public and the public services, and to whomever must rely on radio communica- tion for the carrying out of any hazardous venture. THE MIGHT BEFORE A COMMERCIAL Exam Say You Sew It In QST—It Identifies You and Helps QST

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THE SUPER SYNC The Synchronous Rectifier That Can Be Filtered If you want your ham transmitter to rival com- mercial performance with the power available, we recommend crystal control with super sync plate sup- ply. This combination gives you the ultimate in modern short wave trans- missien. By using such a method you obtain an out- put that only commercial apparatus can duplicate. Crystal control of your transmitter provided with super syne plate supply will materially reduce the PAT. PENDING Price Now $55 F.O.B. St. Louls, Mo. size and capacity of the high voltage filter. This is no small item when high power is used. The wave is of course steady to an unparalleled degree and the tone beyond com- parison. Another advan- tage of this system is that it can be applied to either low or high power transmission. In other words by installing a su- per you have prepared your station for the fu- ture should you desire to increase power. MARLO ELECTRIC CO., 5241 Botanical Ave., St. Louis, Mo., U.S.A. GROSS QUALITY APPARATUS Transmitter Kits Tuned Grid Tuned Plate Ty pe i Watt $47.50 75.00 Plug-In Transmitting Inductances airinsulated wound with heavy plated tubing set $6.75. No C.O.D. Shipments. QST—Listen for our Amateur station 2AUD operating on 39.5 meters. Code lessons for beginners trans- mitted on the Teleplex. Send stamp for sched- ules. Tests Invited. UX 852 tubes......$32.50 Gross Receivers 2 tunes .. —— BS GNSS cccccses $23.75 with any one plug-in coil you select, 20-40-80-200 meters Extra Coils $3.00 each Gross Plug-in Receiver Coils, per set, 20, 40, 80 meters . $11.50 GROSS WAVEMETERS A high grade precision instrument at 1/3 the usual market price. Built into compact carrying case of genuine solid oak, leather handle on top with re- movable cover Coils ex- tremely low loss making a very low resistance wave meter either the flash lamp or galvanometer type will easily respond to an oscil lator using 50 volts or less on the plate of the tube Coils fit Into holder In te cover, Calibration better than 1% guaranted Type 1—L—with flash lamp indicator for 20, 40, 80 meter hands .. $15.00 Type 2-—L—with flash lamp indicator for 20, 40, 80 and 200 meter bands $18.75 Type 1—G—with galvano Plate Transformers for Universal transmitter change from 7% watt to 75 meter indicator for 20, 40, the 75-watt UX-852 watt kit in few minutes. Plug in inductances for tube in stock, any wave length. 80 meter bands . .$30.00 Type 2—G—with galvano- meter indicator for 20. 40, 80 and 200 meter ere $33.75 75 watt, UX-852 Tubes $32.50 J. GROSS & COMPANY, 30 Park Place, N. Y. City Say You Saw It In QST—It Identifies You and Helps QST

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Standard Frequency Signals From WWV HE schedules for standard frequency transmissions of the Bureau of Stand- ards station WWV for the period of October 20 to April 20 were unfortunately received so late that it was not possible to announce the first schedule at all, nor to bring the schedule of November 21 to our more remote foreign readers in time. The precision of these standard fre- quencies is very high. The accidental changes in the ordinary wavemeter and the errors of reading the meter are greater than the inaccuracies in WWV’s transmissions. Quoting from the Bureau’s circular letter- . The unfaltering, “The transmissions are by continuous- true and powerfui j i Ne meee SS wave radio telegraphy. The signals have a BE Condensers and we have not slight modulation of high pitch which aids in of Delilah that will break their identification. A complete frequency n the orchestra plays Samesn end transmission includes a ‘general eall’ and cally of it will emg tomy one ‘standard frequency’ signal, and ‘announce- ower Amplifier, and tne ’ ‘ 3 : being just as good next year ments’. The ‘general call’ is given at the m the Semeon Block fer the beginning of the 8-minute period and con- Roberts Hi-Q . g1 g . P _ -< n seme tinues for about 2 minutes. This includes a ON B BLOCK No. 713 tat + of the The ‘standard Tl Power Tube statement o e frequency. e ‘standar: \M SON B . . . SON ee Pen Pen frequency signal’ is a series of very long \MSON B_BLOCK No. 310 dashes with the call letter (WWV) interven- wer Tubes in Push Pull . . . . A RLUND ROBERTS OFFICIAL ing. 7 signal continues for about 4 BLOCK for Hi-Q Se minutes. he ‘announcements’ are on the = Power Pamphiet a descriptions 6 od prices of TOBE. B BLOCKS. same frequency as the ‘standard frequency TOBE DEUTSCHMANN CO. Camb a M signal’ just transmitted and contain a state- » Cambridge, Mass. ment of the frequency. An announcement

of the next frequency to be transmitted is then given. There is then a 4-minute in- terval while the transmitting set is adjusted QS’ a. Oscillating Crystals for the next frequency. “The signals can be heard and utilized by stations equipped for continuous-wave = . : reception at distances up to about 500 to et tn cd ae Glee 1000 miles from the transmitting station. nt. All erystals guaranteed. Information on how to receive and utilize BROADCAST BAND the signals is given in Bureau of Standards re ek a Letter Circular No. 171, which may be ob- 7 at our POWER. type and is tained by applying to the Bureau of Stand- squency between 40 and 10,000 kilo- ards, Washington, D.C. Even though only s for your particular requirement. a few frequency points are received, persons e Crystal Specialists’’ yo he nee _ o Some — . calibration as desired by the met of gen- SCII riFIC RADIO SERVICE erator harmonics, information on which is P.O 36 Dept. P § Mount Rainier, Maryland given in the letter circular. The schedule of standard frequency signals is as fol- — lows:”

)WER crystals for the various Amateur band

Schedule of Frequencies in Kilocycles (Approximate wavelength in meters in parentheses) HORT WAVE Eastern Standard Nov. Dec. Jan. Feb. March Apri! H TL IPM EN | Time 222 2 2 2 #2 < 4 10:00 to 10:08 1500 3000 550 125 300 3000 grees p.m. (200) (100) (545) (2400) (999) (100) ; _¥ 10:12 to 10: 1650 3300 650 150 325 3300 mitting and Receiving mn. (382) (91) (461) (1999) (923) (91) 10: : 1800 3600 750 175 $50 3600 _m. (167) (83) (400) (1713) (857) (83) SEND FOR LIST 10: : 2000 4000 900 200 375 4000 p.m. (150) (75) (383) (1499) (75) 10: : 4400 1050 225 4400 (68) (286) (1333) (68) p.m. LADIO & : : 13 \DIO & ELECTRIC CO. ul ge (61) p.m. (61) EUREKA, ILLINOIS ll: g 5400 1350 275 5400 p.m. (56) (222) (1090) (56) ll: : 6000 1500 300 6000 (50) (200) (999) (645) (50) Say You Saw It In QST—It Identifies You and Helps QST i le

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a

ITROHM Transmitting Grid Leaks and Rheostats now cover the entire line of transmitting tube circuits.) The prices on these amateur products are reduced materially. ‘Your dealer should stock Vitrohm Transmitting Products. If you have difficulty in obtaining them, W rite us direct. CATALOGUE — 1 5 "WAX. TUBE reer NUMBER — PRODUCT RESISTANCE DISSIPATION CURRENT RATING PRICE ; Grid Le ak* 5000 ohms 44 watts 90 m.a. 100 watts $2.00 Grid Leak* 5000 ohms 200 watts 200 m.a. 1000 watts 2.80 Grid Leakt 50,000 ohms 200 watts 60 m.a. 1000 watts 6.50 Grid Leakt 20,000 ohms 200 watts 100 m.a. 1000 watts 4.25 Grid Leak* 10,000 ohms 200 watts 135 m.a. 1000 watts 4.00 Grid Leak** | 15,000 ohms 200 watts 120 m.a. 1000 watts 6.00 ~~ Rheostatt* — ~~ 50 ohms 50 watts 1 amp. 5.50 7-5 ___ Rheostat*t 20 ohms 80 watts" 2 amp. Geir

07-83 Rheostat*t = 12.5ohms 60 watts 2.2 2 amp. 5.50

! ter-tapy red Steps at 5M—10M—15M Forest P or R. C. A. 852 Tube for R. C. A. 852 or DeForest P Tube e Forest H Tube t* For Primary Control *t Filament and Primary Control Ward Leonard(tectric Company 37-41 South Street Mount Vernon, N. Y.

=) A. C. 3% inch diam. A. C. 2 inch diam. S17 This model, together if ' This complete 2" di- withID.C. Model 301 ameter line, com- and Model 425 Ther- , panionto D.C. Model mo couple instruments, : 506 and 507 Thermo offers a complete and instruments, are also uniform line for panel } guaranteed for 2% ac- use. Scale length, 2.35". : ~ curacy. Ideal for small Guaranteed 2% accura- . panel use. Scale length1.5*. cy on any commercial : ‘ May be left in circuit con- frequency. May be left tinuously. All are uniform in circutt continuously. in size and appearance.

Write for Circular J When leading radio engineers choose are now offered in completely matched lines, Westons for important laboratory and com- redesigned in small diameters for amateur mercial uses, the small operator can cer- use on A.C. panels. Flush type cases, tainly profit by following their lead. Espec- metal or Bakelite, in all required ranges. ially since these same superior instruments Priced from $8.00 to $12.00. WESTON ELECTRICAL INSTRUMENT CORPORATION 158 Weston Ave. < =, * \ Newark, N. J,

PIONEERS™ SINCE 1888

Say You Saw It In QST—It Identifies You and Helps QST

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Calls Heard (Continued from Page 49) ne-2bw ne-3wab ne-5go ne-Saf nj-2pz nm-5e nm-9a nm-laa nn-lnic nq-2cf nr-2fg nx-lxl fm-8ma fq-pm oa-2at oa-2jw oa-2no oa-2re oa-2ro oa-2ss oa-3am oa-3x0 oa-4bd oabax oa-5bg oa-5he oa-Tew oa-Th! od-anf oo-9aa oz-lao oz-2al oz-2bg oz-2br oz-2ga oz-2xa oz-3ai oz-3aj oz-3ap oz-3ar oz-3au oz-4aa oz-4ad oz-4ae sa-fh4 sb-ptp sb2ag sb-2ax sc-2bl se-lfg su-loa. eg-2XV, G. A. Jeapes, “Chandos,” Great Shelford, Cambs, England (20 meters) lbux lbat lbyv lii laal lvw ibig irr lajm laep lbeb inx 2amd 2or 2nm 2cvj 2ayp 2aib 2tp 3baqz 5agq 5mx 5dq Sadg Sahc Saxa Srh Saly ne-lbt np-4pq Improved Positive Voltage Control for se-2ah sb-2ar wnp. “B” Eliminators eg-5HS, M. F. J. Samuel, 16 Blenheim Rd., Lendon, NW8, England Duty Potentiometer is all wire 2 the entire. output of any “B” ladm laff lajm lasu laxa layg ibkv icmf idm nusually high margin of safety lii 2agn 2aib 2aiu 2alw 2bg 3ads 3bgg¢ 3hs 3mw 3nr ant at any knob setting so that 3tn dio 4nh 4rr Sac] Safb Saga Sagq Savs Sbh 5mx othe in volts. A single turn of 5sh 5wz 6Gagr 6azs 6bam 6beq 6bjf 6bj] 6bux 6bxi 6ec! rrying capacity to permit shunting Geuc 6ezq 6dfe 6gw Ghm Grf 6vz 6zat 6zi Tde Tgb Tkf ross the “B" power unit to obtain 7tm Tuq Tvh Sagh S8aro Satv Sben 8ve Yanz Yara f A sufficient current load is Mase Yask S9ayr 9bmx Ybay Ycei Yedw Yemv Ycuy Ydb a 4 a —F 9dbz 9dce Sdke 9ef ne-Zal ne-3bt ne-3fe ne-3jm even oug se 8 ot col "ted, w ia tad patna Bao By Bay ne-4du ne-4fv ne-5au. details of this circuit. eg-5MQ, E. Menzies, School House, Faakerley, 5,000 8,000, 10,000, ee 20,000, Liverpool, Eng. you dealer's, c 0. D ee = lry lbql lzw lon ive ifs imv lic lamu Ibat CENTRAL RADIO LABORATORIES laci Igh lbqd ibke lalr lbms lag latv lenz ladm . . lare lcjp lxm laur Irf 2iz 2ewm 2fg 2tp 2ats 2agn 20 KEEFE AVI MILWAUKEE, WIS | 2cuq 2awu 2cyx 2mz 2czr 2qf 2ard 2bbx 2erb 2bad 2azk 2bqh 2g¢x 2amf 2he 2cvj 2gp 2Zayj 2ajm 3ank Saef 3mv 3sz 3qe 3tn 3sh 3jt She 3ceb 3pf 3bva 3tm Sbn 4hx 4dx 4af daar drr diz 8jq 8cxe Spl Sut Szae a Sdrj Saks Saxn 8box Sajn S8djp S8cnh Salv Sanc Sdjg 9za ne-lad ne-lbr ne-2bg ne-3ae nr-2fg np-4pq nz-ez5 sa-cb8 sa-fc6 sc-2be sc-2ar sb-lam_ sb-lao sb-lel sb-lar sb-lcg sb-laj sb-lbr sb-lic sb-lag sb-2ax sb-2as sb-2ag sb-2af su-2ak sh-bz!l ardi. a nd GUARANTEED Miss B, gay — Seong England a . 7 Ke : : lads laff lajm lare laur laxx lbeb lbyv Iicjh Iemf 16 watt, 7.5v with midtap Idm lia lii ~~ lry lvw 2alm 2avb 2bal 2bg 2cvj ‘ J 2sy 2xad 2xr 3afl 3cec 3mv 4pi 4ay Tsw Sadg 8aj 150 watt, 10v with midtap Saly 8dgx Sdhx 9dke nuw ne-cf np-4sa ef-8sis eu-4qy sb-2ar od-anc od-and. tandard sockets, 3 for $1.00. (40 meters) phones, $1.50 pe. lbze Icje lql Ixv 2aod 2cyx 2vd 2xaf 3cbt 3rf 3qe ndensers $2.00 ea. Swj 4ll 4xe Ske Sajn ed-7lk ek-aeq ek-dep el-lala htning Switches, $1.50 ea. ep-3¢b et-jach et-pbn eu-lkp eu-rkv eu-4qy eu-lora fm-8ju sa-cb8 sb-lao sb-4as nm-S8a ss-2bn oz-lac with C. O. D. oz-lax oz-2ar oz-3aj oz-4aa ea-Omp ee-ear70 ej-7xo ew-ki xel-tsb hzal suc2 Ixr pjd xkp. \TE RADIO COMPANY H. and W. Haseldene, 23. Barry Rd., E. Dulwich, London, Eng >t Roslindale, Mass. laac labd laci lacv lafa laiq lakm laks lalr lamu lani lanv lanz laoh laoi laor lapu lapv laqt —— lare lasi latr latv — ae layl — ag — } ; . Ibbe 1lbb] lben Iibeb 1 Ibft lbge lbje Ibif Iblw Quality Fixed Electrical Condensers lbqm lbvr 1bx]l lbym lbyx lcax Icbh lcep lces Icfr Fast Hi-Test extra-capacity Condensers for lecjj Ickj leng lcom ictm If] lic liu llw Imp Imt ee ae faye Re —- Inf lom lav isk ivr lvw 2abf 2abp 2aby 2acd 2ach ing impervious & chimatic changes. 2ad] 2afr 2afx 2agn 2agp 2agr 2agw 2ahb 2ahf Labor moisture content , assures depend 2ahg 2ahi 2aib 2aiw 2alj 2alm 2alw 2amf 2amj 2amy able ns in use sincel919. Fit all units. 2ang 2aow 2ape 2aqo 2asb 2atk 2ats 2aun 2avk 2ava Write for 3982 Barry Ave. 2awq 2axg 2ayn 2azk 2bad 2bbe 2be 2bcb 2bck 2bco free | Dept. HH 2bep 2bev 2bdj 2bgz 2bmj 2bmr 2bs 2bse 2bur 2bvd attract Q)OHN “ USA 2bxj 2cc 2cjx Zens 2cs 2esh 2etm Zewm 2ex 2cy book let Chicago. U. 2di 2du 2dy 2ea 2ez 2fm 2fp 2fs 2ha. 2hr 2ih 2iz

Get the ADVANCE ‘“‘Sync’”’? RECTIFIER (= this improved ‘“‘Sync’’ Rectifier. Su- Speedy a Rr no attention—always th J periority proven by its prevailing use in ready , H.P. Westinghouse motor, international transmitting. Lower in price in $55.00 complete. spite of higher quality. Get the best. Write now for free descriptive Advance Syne _ --¥ — all 7 fotder wirements for heaviest duty. mproves a teonemiesten giving clearer "ene and better ADVANCE\ ELECTRIC COMPANY volume. Can be easily and quickly filtered. 1260-1262 West Second St.. Los Angeles, Calif.

Say You Saw It In QST—It Identifies You and Helps QST

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wow! 2 TUBE KIT $9.95 Panel Drillea Drilled Variable Front Sub-panel 2 Cardwell Jensers Dials Rheostat Jack 2 Sub-panel ) Sockets Audio Transformer Grid Condenser (Mould. ed Bakelite Pair Grid Clips Binding Posts Primary Coil Coil 1 40 Meter coil Coil (Plag-in-Type R.F. Choke Con- Brackets Spec (Antenna (Secondary "SAVE MONEY. BUILD YOUR OWN | WHAT A BUY! 3 TUBE KIT $12.75 Panel Drillea Drilled Variable Con- Front Sub-panel Cardwell densers Dials Rheostat Jae Sub-panel Brackets Audio Transform- Condenser (Mould- ed Bakelite) Pair Grid Clips Binding Posts Filament Switch Filament Resistor Primary Coil (Antenna Coil) 10 Meter Coil (Secondary) (Plug-in Type) Choke You can now buy a short wave kit at less than wholesale prices and still get a receiver equal to any on the market, consisting of high grade parts as listed. break in at at this price. Here’s your chance to than $10.00. EXTRA COILS FOR 20-80-200 METERS BAND, AT $2.50 EACH EXTRA. ABOVE KITS ASSEMBLED AND Foreign Shipments $3.50 Extra. now on the air. No C. O. D. Shipments. as represented. SHORT WAVE 15 Park Row, to be (PLUG-IN TYPE) WIRED TO Just the thing for Receiving No Discounts Never before the game for less short wave AND SPECIAL COIL FOR BROADCAST ORDER 2 Tube Kit $3.50—EXTRA 3 Tube Kit $4.25—EXTRA numerous short-wave broadcast stations, High grade parts used throughout. Guaranteed KIT COMPANY New York City RADIO OPERATORS WANTED THE EASTERN RADIO INSTITUTE can train you quickly and thoroughly because: MODERN AND EFFICIENT METHODS THOROUGH INSTRUCTION under staff of LICENSED COMMERCIAL OPERATORS MODERN APPARATUS including SHORT WAVE TRANSMITTER FIFTEEN years a RADIO SCHOOL THE OLDEST, LARGEST and MOST SUCCESSFUL school in New England. : % “aeeeeres BY THE A. R. x Day or Evening Fant Start Every Monday. SPECIAL CODE CLASSES Write for Illustrated Prospectus EASTERN RADIO INSTITUTE 899 BOYLSTON STREET BOSTON, MASS. FREE—NEW CATALOG DEALERS & SET BUILDERS .. . Write for our new 1928 Catalog. Its FREE. Shows latest and best nationally advertised radio equipment. Com- plete Kits as specified in articles in leading radio magazines now ready for shipment. No delays in filling orders. Best Prices. Miller-Welles Co., 20-0, W. Kinzie Street, Chicago RADIO THEORY AND OPERATING 3rd Edition, Revised-886 Pages—700 Illustrations—Price $3.50 By Mary Texanna Loomis Loomis Radio College; Member Radio Engineers Ar nerica’s standard radio book. Used by Dept. of Commerce, S. Radio Schools, practically all Radio Schools throughout U. 8. and Canada, Universities, Colleges and High Schools Buy of your bookstore or order direct. Postage paid LOOMIS PUBLISHING CO.. T-405 9th St., Washington, President Institute of Dept. D. C. 16 inch MUSICONE $12.75 12 inch MUSICONE $9.75 Since Crosley is portant radio patents and experience naturally produced an amazing Bandbox’’ AC model using the new R.C.A. AC tubes working directly from electric Power Converter, $65. Power Converter $60 extra If you cannot locate a Crosley dealer write Dept name and literature radio Powel Crosley, Jr., Pres. Crosley Corporation of America and associate companies, also He-eltine Corporation and Latour Corporation anly Radio Amateur, Experimental and Broadcast Reception. GROSLEY Montana, Wyom- ing, Colorado, New Mexico and West prices ahead higher $55 The BANDBOX licensed to manufacture under nearly all this combination with Crosley leadership -the and light socket through the Crosley 18 for his The Crosley Radio Corporation Cincinnati, Ohio is licensed to manufacture under patents of the Radio the for RADT© tm Say You Saw It In QST—It Identifies You and Helps QST 85

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As Accurate as Plus or Minus 1% T! iE r » engineer, alter all, has only one guage for selecting the resistors his com; uses. Simply stated, it is: “| ate is the resistor, and how long t maintain that accuracy un aC load conditions?” Harfel can be supplied to you as ac- curate r minus 1%. Moreover, they are abs aranteed to maintain accuracy under a 1 conditions. Tell usa e resistor you want and let us send youas le to your specifications. Write HARDWICK, FIELD, Inc. 215 Em: : t - Newark, N. J. ry W/RE-WOUND RESISTORS a | a a a 4 RELIABLE Transmitting Condensers OB-124 2 0 volte D.C. working OB-144 im 1000 volte D.C. OB-212 1 MI 000 volts D.C. OB-224 2 MI 2000 volts D.C. OB-475 4 MI 00 volts D.C. OB-1420 2 M 6 volts D.C. OB-1440 4 M 0 volts D.C. B. & O. Condensers are guaranteed BRIMBERG & ORTH 277 Broadway New York City Our 1928 catalog is jammed full of the newest off stionally known radio kits, sets, = ble and console cabinets, ete. Whatever y ed may be it’s in our 1928 catalog. Als Short Wave Section show- ing the fin« g and tranemitting appar- atus. Writ w catalog—a for our mmediately. confidentia 5 t—bot write i SHURE RADIO 339-H Madison St., Chicago, Il. ————— Learn the Code at Home Withthe Omnigraph Morse and Wireless—taught at home half usual time at trifling ZA, Omnigraph Automatic Trans- e tter will send, om Sounder or Buz- nliimited messages, any speed, as expert operator would. Adopted U. S& Govt. and used by leading ersities. Colleges, Technical and Telegraph Schools throughout U. 8. Send 6e for catalog MNIGRAPH MFG. CO., 19M Hudsen St.. New York 2je 2jx 2kn 2kr 2mu 2ns 2ow 2pp 2px 2af 2qh 2sb 2sz 2tf 2ty 2ub 2vb 2vd 2vq 2wd Sach 3add 3aef Safl Sag 3agc Sahf 3aim 3ais 3ajx 3aks 3alh 3amc Sank Sauw 3baq 3bco 3bdi 3bgj 3bgs 3bjy 3bms 3bn Sbqp 3bsd 3bz Schl 3cch 3ceg 3cef 3ckj 3fh 3ga 3ge Sib 3jx 3ku 31ib Sip 3lq 3mb 3mi 3nc 30w 3qi 3qm Sqw 3sh 3sz 3te 3wq 3wj 3xan 3yh 4aae 4aao dat 4af 4daba 4abe 4bp 4dbr 4cj 4cl 4co 4dd 4dl 4dx 4eg 4ei 4fe 4fg 4fi 4fu 4fv 4fx 4fy 4gl 4h] 4io 4jd 4li 4ik 411 4nq 4oc 4ok 4on 4oy 4pf 4aqa 4qb 4rm 4rn 4si 4sp 4to 4tu 4vh 4wa 4we 4wo Sadz Sae baip 5ajr Sala Sanc 5ao 5aq Saqf Sarf Sasc Satf Satp Sauu Sav Saxp Say Sbe Sck 5di 5d] Seb Sek Seq She 5Shz 5ja 5jd 5jm Sir Sjiy 5k! Sif Slu 5mx nj 5nl 5Spq 5qj Sre Sry Sth Suk Sut 5va Svf Svx Swo 6bjl 6chs 6cqz 6cyd 6ec 6nw 7fd Saaj Sabw Saec Saef Sagy Saha Sair 8aju Salg Salo Salu Samt 8anx Sapo Saqgh S8arm Sasf Sam Sayf Saye Sazg Sazh Sbay 8bb! Sbee Sbct Shep 8bgh Sben Sbew 8b! Sblp 8bm S8bnh Sbno Sboz Sbpa Sbrf Sbru Srx Sbsu Sbwa Sbwz 8bxe Sbyp s8bzz Scai 8ce Seco Sedf Sefl &cfr Sciy Scjb Bejv S8cke Scks Scnh 8coa 8con Scpe Scpw Screg Scrp Scvs 8ewt Sexh Sczk Sdbe Sdbe Sdbg 8dbj 8dbm S8deh Sdgp Sdia Sdjf S8djp Sdke Sdkk 8dmm Sdne 8dpa Sdqz 8eh Sey Shb Shi Shx 8im 8iu 8ks 8li 8mq 80q 8p! 8rh &sf Sabr 9aco Yakt 9agh Sarh SYaue 9auu Yavz Yaxb Yaxz Sazp 9ben Sbdt Sbeu Obff 9bfy Bbhi 9bk! 9bmm Ybaqc 9bu 9bwn Ycet Ycix 9emj Yemq Yemy Yene Ycon Ydah 9dbi 9dce 9dr Seas Seds Seev Yefo Yege Bele Yell Of! 9qd 9qi Orf 9sa Osx Suz Oza 9zd. S.S. Wray Castle at Alexandria, Egypt. QSL to H. Edmonds, 27 Victoria Street, Newark Notts, England laae laya ibea libep ibms iccx Icjh ifbp Ifl lgk lgp ga likh Imp iInx Ipa ivw 2aas 2abt 2agn 2ahi ahp 2ame 2av! 2az 2bur 2ca 2ex 2ie 2kr 2qf 2uo 2uz 3aef Sag 3alq 3am 3auv Sbms 3bqj 3cab Scbt Sec Sia 3id Ssh 3aj 4abe 4fa 4g! 4jz 4ka 4)k 4ll 4nq 4to 4wo Sac! 5adz 5ck 5d] Sez 5mx 5nl 5oe re Swe Swo Saaj Sac Saey Sanc Sary Savz S8aze Sbno Sbox Sbqm 8bsu Secs Sced Schk Scng Sexd Sdem Sey 8jb 8lj 8zi 9adg 9bhi Yash Ycrj 9k¢. sa-FC6, Dr. Julio J. Hiver, San Martin 3169, Argentina (20-meter band) lakz lahi lanu lasu laep laff lbyx lbyv lbux Ibbj lemx laur icmf icm idm lio Inv Isw lii iIxv lxm 2aol 2atk Zahm 2alw 2agn 2cxl 2cjj 2ece 2gx 2vg 3ag Sbtq Shs 3no 4au 5ac! Sbf 5dq Sie 5mx 5w! Gari Gann 6am Gagr Gbux 6bdj 6bf 6bil 6bq Gbzf Gczy 6Geck 6eyg 6ckv 6csj 6dfv 6dch 6daq 6dck 6dhq 6dhj 6fr Sih 6rn Grr 6tx 6zat Saj Satv Sadg Saly Sba 8Scmb Sees Scau 8cfr 8csj Sdem Sdsy Sdjv Ses Sahe 9anz Sara 9bjip Ybpm Bbzi Sewn Ycei Sdb Sdws S9dgex Y9dod ef-8cl ef-Six ef-8jm ef-8jt ef-8jf ef-Syor ei-2it ei-lay np-4sa eb-4ww eb-4zz ne-lar ne-3ecs ne-3gg¢ oh-6dbl sb-laa sb-lad sb-lib sb-2ab sb-2ar sb-2ig sc-2as sc-3ag su-2ar. sb-SQAX, Radio Sociedade do Rio de Janeiro, Pavilhao Tchecoslovaco, Av, das Nacoes, Rio de Janeiro, Brazil 2iz thbe 2cuz 3pr 4ea 9act Sig Sefo sb-5aa sb-sqmk su-leg. Alois Weirauch, Mestec Kralove, Czechoslovakia laao ibze 2ahg 2ang 2ayj 2czr 3ep 3sh 3ae 4ll aq-Imdz eu-l0ra @u-l5ra eu-ra58 eu-lnn fm-Say fm-8ip fm-8ju fm-S8kr fm-8wx nj-2pz nr-2fg sa-cb8 sb-lah sb-law sb-lea sb-lic sb-2af sb-2ag sb-2ap sb-2ax se-2ah su-2ak dnse gkt glyk hbe nkp opq vwz wpo wse wit. (20-meter band) 2amd 2ahm Sahy 2xad 2xr. 8.8. Leerdam, J. Arends, operator. QSL c/o Radio Wereld, 250 NZ Voorburgwal, Amsterdam, Holland (Between Antwerp and the Azores) (20 meters) nulach laci laep lafi lakz lamd lamz lawe layg Ibbm ibeb ibjk ibr libvl lbw lIbyv ickk Idm ligr lii 1k] Imv Inv Iisz lvm ivw iz! 2ab 2agn 2ahm 2aol 2ard 2ary 2ayj 2bac 2ceub 2evj 2dr 2mb 2mn 2nm 2rd 4tu 7sw Sadg Salv Saly S8aro 8ecq Scfr 8cjv S8dme 8jq Sbov Scrv 9dqu Sik 9sk 9za nec-lbt ne-Sae np-4wrh sa-da9 sb-lac sb-law anf hig. (40 meters) nulabd lag lamd lazd lbwe lej img lic lle Iilx iIrf 2amj 2aun 2ayj 2bbb 2bdn 2beo 2bxu 2erb 2cugq 2hr 2mb 2tm S3aef Saio Sauv 3cx Shs 3pf 3rf 4af dap Say You Saw It In QST—It Identifies You and Helps QST

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“SS Se —_, co (Fer

This is Item #26 used as a Plate Power Supply for a 204-A Tube. Bulletin 237 lists over 300 other Generators, Motor- Generators and Dynamotors for Radio purpose. If you haven’t your copy, write for it today! ELECTRIC SPECIALTY COMPANY Mark “ESCO” Trade 522 South Street Stamford, Conn., U. S. A. Manufacturers of Motors, Generators, Motor-Generators Dynamotors and Rotary Converters, for Radio and Other Purposes

For Your “B” Battery Eliminator, Ask Your Dealer for Guaranteed Q:%'S | Gaseous Rectifier Tubes ARE BETTER 60 Milliamperes 400 Milliamperes $ 4 5 With lonizer — 300 Volts = for A, Band C Eliminators 85 Milliamperes with Charts and Diagrams $4.50 $7.00 Manufactured by THE Q +. R°S COMPANY Est. 1900 CHICAGO PRAGUE MIDGETS are built to carry maximum loads. A new SPECIAL FREE RADIO GUIDE process of triple impregnation and a a BA

Sannethntededl special waterproof asphalt wrapper amateur de pt. Sree en tees + ag new. ff insures constant capacities. i ——s est developments in come at startlingly / The new .1 M. F. D. is truly a con- jlow prices. e ‘0 |de sire. Thejand save up to 60%. The best in parte, denser revelation. Order it from your Barawik Radio| kits, complete factory-built sets and <8 dealer or send one dollar for sample Guide gives fuil/S¥pplies._ Orders filled same day re- . ved. Write for free 1#4-page copy NOW; complete with mounting bushings. : ce . details, SendiW i lesale prices to dealers. for it. ___BARAWIK CO., 129%. JEFFERSON, DEPT. 411, CHICAGO, U.S. A esti diane -T MASSACHUSETTS RADIO i — ‘ AND TELEGRAPH SCHOOL incy, Massachusetts Trains for the Merchant Marine and positions of importance in Radio WRITE FOR CATALOGUE 18 Boylston St., Boston, Mass.

Say You Saw It In QST—It Identifies You and Helps QSsT

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KNICKERBOCKER 4 THE WONDER SET 2-DIAL KARAS EQUAMATIC 5S Tube Receiver The s f the Knickerbocker 4 and of tl Karas Equamatic have beer neous. Thousands of dis- crin lilders have built or are build r the other of these great Kara r Karas Condensers, Tra ilters, Coils and Dials for ckerbocker 4 or the 2- Dia] iamatic now are stocked by de ywhere. See your dealer toda equest we will send you free | ts, Wiring Diagrams, In- struct | our complete catalog of all Ka Write for them NOW. ARAS ELECTRIC COMPANY 4030-5 North Rockwell St., Chicago BECOME A RADIO OPERATOR ~ Vorid. Earn a Good Income Light and Fascinating. LEARN IN THE SECOND PORT U.S.A. here. New Orleans supplies oper- f ports. Most logical location in training operators graduating on the years trained by MR. CLEM ction All graduates secure Call “5 G R” Enroll anytime—Write for cir GULF RADIO SCHOOL 844 Howard Ave. New Orleans, La. . Vlatora Prod © Distocdontess Amplification rt “H’* tube $3.50. Copaiate don bakelite and connected in tar « for DeForest * { your ““H"’ tube requires 60, smateur apparatus instock. Let ce san Jamaica. N.Y. 166-32 Jamaica Ave.. DON’T STRANGLE » high resistance rectifier. Avail- but 15 volts drop—irrespective of » flock of 204As with equal 6000 volts Filters perfectly stal control purity Full wave hash. You want @ mercury arc D solved FIER ENGINEERING ‘837 Rockweed Read, SERVICE Cleveland, Ohie od-IGR, Paml M. Hargis, Dolok Merangir, Sumatra, Dutch East Indies 6am 6azs 6bda 6bjx 6che 6cqj 6hm 6pv 6jc 6zi op-ld] op-lhr op-lbd op-lat op-lfr op-lah op-Ire op-xc3 oa-4ea ac-2ff ac-Shb vs-lab vs-lac vs-3ab aj-2bjk aj-jkzb a-—2kx ailbk xac-lje ae-lhh sb-lap sb-lar od-pa2 ep-lma fm-tun2 gi-6mu eb-4au anc anf and acg agb hva hzal hvn hvee idx pkp vps jyz ocdj olq di4 ixr lbk 2bk 2xt 5Sby Seb wuay wuk. ss2BN, QSL via nc2BN lavj latv lazd ibhs Ibjk Iicje 1dl Imv lve ixv 2aeh 2aes 2ag 2amj 2and 2asf 2bo 2bs 2cty 2ezr 2f¢ 2gx 2ty Safu Saih 3bms 3che 3ckj 3¢i S3hw Ssh 3tf 4ac 4af 4gp 4hl 4hx 4js 4km 4kz 4pi 4ut 5ae 5baj 5ao Sav Sagu Satf bce 5fs Shz Sie Ske Sok 5qj 5aq Suk Svx Swz Gaaf 6Gaak Gadk G6Gagr Gahn 6aiv 6aiw 6ala Galz 6Gamn 6ato 6Gaqx 6awy 6bam 6bap 6bax 6bdn 6beb 6bgo 6bhv 6bik 6bis 6bjd 6bjv 6blw 6bmw 6bob 6bq 6bts 6bvh G6bvm 6bwk G6Gbws 6bxc 6bxd 6bxi 6byz 6bxe G6bxd 6bxi Gbyz 6bzce Gcae Gcbz Gedy 6cej 6chl 6chs 6cenx 6cgh 6cqm 6csj 6csw 6Geua 6cub 6ecur 6ezk 6cezu 6dbh 6dceu 6dfr 6dh 6dhr 6dht 6djw 6dkd 6dkj 6dlj G6dqh Getw 6fh 6jn 6js 6ju 6kn 6ks G6pv 6rn 6ta 6ve Tabh Tadd Tadr Talk 7bb 7fh 7jv 7mf Tmh Tok Tpv 7tl 7tj 7vq Sajn Sakv Saly Sauc Sauq 8bbw 8bja 8bki 8brf Sbsu Sben Sblp 8bth Sbxi 8ced 8cjv 8epq 8ced Serp Scwt S8dbm S8dem 8djf 8djp Sey 8! 8jq Spl 8vx 9adm 9adn 9aeb Sarr Yajv Japa Yavz Yaxo 9baz Iben 9beq 9bmm Ybpm Ybae Ybtb Ybwj Mbwil Yecv IYcei 9cks 9emq 9ecrj 9evn 9exg~ Yexq Yezh Sdah 9dcb Y9des 9dfz 9dma 9dud 9dpw 9dr Sdxg Yecs Yehn Yefk ek Sekf S9ekw Off 9fs Ink 9pc Ipu 9wj 9wk Ywr Y9xn oa-2uk oa-2hh of&-2re oa-2yj oa-2ss oa-3jk oa-3jw oa-3vp oa-3x0 oa-5be oa-5bx oa-5by oa-5dx oa-5if oh-6deu oh-6dju oh-6dv o2-2bg o2-2bp oz-2br oz-2ga oz-2rx oz-3ap o#-3ar oz-4aa oz-4ac na-7kn ne-2be ne-2al ne-2bg ne-3hp ne-4bt ne-4fv ne-4fy ne-4et ne-5ad ne-5 aj ne-bgo nm-lj ns-lfmh nr-cto ef-8aro wnp whbny. ed-OIK, S.S. Lituania, QSL Wireless Operators, SS Lituania, Holbergsgade 2, Copenhagen, Denmerk laot laci lang laep lasy lanv lauk lbw iba lbeg lbzq leon legz Icd lef 1ff kh Imo inf Ipo Iisz luz lzd 2amj 2avl 2ami 2az 2aby 2agn 2abt 2avb 2apa 2bo 2bhe 2bfw Zdau 2cvj * 2md 2qs 2rs 2uo 3adm Safx Saio Sais 3bei 3bwt yo Scaq 3pr 4af 4io 4)jI 4kf 4kd 4ll Bee: 4rp 7 afb 5atf Same Sbh 5ba 5jp Sif Sms Swz 6amn 6aaz 6aek 6bjt 6bq 6cjs 6cww tdha 6pv Saks 8axa Salu Saov Shaw Sbpd Sbxr 8bpz Sabor Sent Semb S8cau Sdia Sdjv Sdid Sia Sim Sqv Yafa Yavy Yafi 9ajj Yaex Y%adq 9bki 9bkn Bbbt Ibvh Ibdw Ybmw Ybeq Ybwn Ief Gerd 9ckv Yenq Yeld Bday 9dqu 9dsh Sdpb Sdr Yecl Seey 9ecs 9hm 9b 9rf 9wo ea-ky eb-tar eb-4bdf eb-tuu eb-4ww ed-7hm ed-7jo ee-ear7o ef-8nn ef-8fbm ef-8fr ef-Ser ef-Smaud ef-8mmp ef-8kp ef-8vvd eg-2nk eg-20q eg-Sby eg-bdh eg-5ku eg-imq eg-6ia eg-6cl eg-G6hp eg-6mu eg-6ms eg-6yd ex-Gyv eg-6za ei-lcr ei-lcy ei-lau ei-lno ek-4ade ek-4dbs ek-4kbl ek-4uz ek-4uf ek-4vr ek-4xf ek-4xz em-smua em-smzf em-smuk en-0be en-Oga et-pao ew-aa oz-2ac oz-3aj oz-3ap oz-3bq oa-7h! sa-feb sb-laa sb-lad sb-lah sb-law sb-lax sb-lbr sb-2ar sb-2ay sb-2ax sc-3ag su-loa sad sgt scp sfv sab sjb ate gkt ocxs wnp wvr vde bo. 8.8. Charles Christenson, operator, Aleck Sienkowski, 65 Geer Ave., Norwich, Conn. Aug. 16-29 lare lbez lenz laci 1ql 2az 2ayv 22! 2arx 2abt 2jx Safi 3bms 3lq 3mb 6cem 6ceww 6chs 6dbe G6bhv 8dhx Sasm 8did Sctk 8dfo 8wd Samb Sbwn S8cau 8dbm Sdnu 8jq S8asm Q9ada 9bea 9dej 9dma YIf Yaio Sbeq 9bpd 9bvp Icxe 9dud Yefo 9ju Ylz Ybof Icemaq Bec! ef-8cep eg-5mq eg-5Sby ss-2bn oo-kflf ek-4uah eb-4ww sc-2bl oz-2ac oz-lao oz-3ap oa-2jw. KDRX, Joseph Kazokas, c/o Independent Wireless Tel. Co., Box 66, Wall Street, New York City lag lals lanw latv lawm laxa lazd ibat ibea lbch lbhs ibke l1bvl Ibyv Ich lecz liecdp ickk icr leue 1fi igh lic 1lv Imf lmo Iimv Isz luz ixv lizz Gaal 6Gagd G6Gagg 6Gahm 6ajl 6akm G6akx 6amm 6bau 6bb 6bhj 6bhv 6biv 6bmo 6bts 6bxj 6bxn G6cae Gedy 6emw 6cpy 6csj 6ctd G6euw Gewk G6dag 6dap 6dha 6djw 6dkj 6dkx 6dlj 6dow 6gw 6hj 6rb 6rj 6ve Thm Tic 7ij 7mf Tmy Tpo Tti eb-4ww eg-2xy ek-4abe ne-lar ne-leo ne-ldd ne-2al ne-3cs ne-3dz ne-4cem ne-4fv ne-5go ne-voqg nd-hik nm-9a np-4ach nq-2cf nr-2fg nz-ez5 oa-2yj oa-4by oa-4yn oa-5hg oh-6dba oz-2gce oz-B3aj oz-4ac sa-cb8 sb-lao sb-lcg sb-2ay sf-dez ss-2bn oic oik sjb wel wnbt xam. Say You Saw It In QST—It Identifies You and Helps QST

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oak r+ 1 ] , Eterna If é > cannot guarantee eternal life,b arantee the AER INDENSER when pr ast ali the other equipment us weeledi tie wmelelem sicem is WHY??? Because IECCAUSE eacn section of ndividually sealed and Pye Dis. meeslell atic 26 lel el gala: the safety factor used bear tattie (matia mee letal i eali@tale aelatic rated workin Was s Out we Are You Properly Keeping Your 1927 Copies of OST As Issued? Note the wire fasteners Unnecessary to mutilate copies. Opens and lies flat in any position. A binder will keep your QS Ts always together and protect them for future use. And it’s a good-looking binder, too. QOsT 1711 Park St., Hartford, Conn. It has become standard practice " PARVOLT WOUND CONDENSERS in circuits that break down ordinary by-pass condensers. You will find that the same charac- teristics of accuracy, high direct- current resistance, and ability to give continuous duty at full rated voltage, make them desirable in cir- cuits where even a poor condenser might “get by.” THE ACME WIRE CO. New Haven Connecticut Say You Saw It In QST—It Identifies You and Helps QST

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& FROST-RA® = =—s—s—=“) FPROST-RADIO FROST-RADIO FROST- _ | FROST-RADIO ve ae APPARATUS Smoother Than Silk That best describes the operation of FROST-RADIO Vari- able High Resistance i} Units. Jumpless, step- J less, noiseless opera- tion, with continuous- ly variable resistance over the entire range of the resistance ele- ment, Non-wearing roller contact arm entirely eliminates any frictior sce of element. These units are lished black Bakelite shell, Bak« engraved pointer knob, and transpa te dust cover. Two or three termir ther type, less switch, $1.75. With ne filament switch, $2.10. De- mand ible High Resistance Units from Lier HERBERT H. FROST, Inc. M | OFFICE and FACTORY ELKHART, IND. feage St. Paut ae York > New Orleans Buenos Aires Reston . a, D.¢ Los Angeles Argentina ‘rom the “*Big. Friendly Radice House’’ 28 Book offers finest, t well-known sets: parts, accessories at lowest Dealers. set-builders, agents & for this CATALOG! western RadioMfg Co. 124 West Lake Street Dept. 68 CHICAGO, {LL 4it 4js 4mi 4ob 4rn bajk Sav 5ql Suk Szav Sagi Sbbs 8bxr Scbd 8cjv 8cxi 8deb 8dem Bin &jq S8pk 9beq 9cn Serj 9dzl 9wr eb-4ck eb-4ww eb-4zz ed-7zm eg-imq ei-ldy ei-lno en-Owj ep-lae ne-Srg¢ nq-2cf nq-7Tcx nq-8kp fi-lab sb-lah sb-lar sb-law sb-2ib sb-5aa ss-2bn oa-2no arcx ign vyg. (Between Bermuda Ids. and the Azores) (20 meters) laal laav lanw lavy Inx ixv 2aue 2bdk 2cx] 4tu 5aoct Ssh Sabw Saj Sbpq Sbre 9baz Ybsk Ybxi Ycei 9dka 9dws Qin ne-lbr nelbt ne-3fce sb-2ar eb-4zz en-ovn wnp. (40 meters) nu-laci Ibux Ickp Iclf 2amh 2ago 2avr 2bad 2beu 2bow 2fs 2ub 2xi 3sh Swf 4rr 4ut Sav 5ke 5sh 6am S8asf Sbno S8cko Scrp &8rt Swk Sbig Ycye Y9ek na-7kx ne-lar ne-2bg nn-lnic nq-2cf nr-cto nr-2fg sb-lar sblaw sb-2as eb-4ac ef-Scp ef-Seo ef-Shu ef-8ijf ef-80e0 ef-Sxix eg-buw eg-6og ei-ldm ei-lno ei-luu ek-4af ek-4oa ek-4uah ek-4dyo ep-3fz oa-2ij oa-2jw oa-2yi oa-3vp oz-2ac oz-2ae oz-2bg oz-2xg oz-3ar oz-4aa nezb ocly voq wnp wuwr wyj. (Between Azores and Bermuda Ids.) (20 meters) nulad laiq lame lamu lawe ibjk Ibux ibyv lihh lii lvw 2amd 2ary 2jn 2md 2nm 2vs S3akw Sank S8chge 4km 4nh 4qb 4rn 4wh 5aot Swz 6cct Sail Saly Saro Saxa Sbdp 8bju 8cfr Scke Scug Sdds 8did 8ijq Gaz 9bay 9bsk Scrii Scrv 9cu Ycug Sdmb Sdpw 9duw S9dws 9%ef 9mo ne-2al ne-Sae eb-irs eb-4ww sb-law oa-2me sc-3ag. (40 meters) nulabo lacg labd laiq lamu lanz lare lasu laxx layl lbkv lbqs lccz lIcub letj lic lim Ifi ifs lle Imp lvw 2aed 2agu 2agw 2ahi 2ajb 2asi 2avb 2Zauh 2awi 2bdj 2bm 2bxu 2cty 2cyx 2dp 2fg 2fs 2fx ex 2md 2nf 2qh 2qu 2wj 3afi 3afu 3afv 3ag 3alq 3ank Sapn 3baqj 3cab Schg 3ec Shs 3lz 3qe 3su 3sz daba 4ac 4af 4co 4ec 4li 4tk Sahm Same bay). (40 meters) nubdki 5qj 5ql 5wo 6adm 6bijv S8aje Sagy Sauc S8bbe Sbbo Sbep Sbhz 8bjb Sbju S8bir S8bnh Sbyh 8cxd 8dgl Sdhu 8gn Sho 8jq 9as Yavg Ybaz 9bbs Ybeq Ybeq Ybhi 9bsy Scya Sdeb 9cerd Ycrj Ycue 9dkk 9dma 9dqn Sday Sdvw 9ekt 9ff nq-2cf naq-7cx nq-2ro nr-2fg ne-lak ne-lar ne-lbr ne-2be nd-hik nz-5ez ef-Scf ef-8jf ef-8wz ek-4dbs en-O0qq sb-lah sb-2al sb-snni oz-lfb oz-3ap oz-4ac oz-4ae oz-4am oa-2sh oa-2yi oa-3es ftj knux xwab glky. — td. ng _...“ 6RJ “A LITTLE UNSTEADY, BUT EASY TO FOLLOW’ Parco S. W. Transmitter A SHORT WAVE TRANSMITTER THAT WORKS! 2AQE says, “With unlimited time and money, I could not build better transmitter.” WIRED & TESTED for 20 or 40 meters only $20.00. Guaran- teed to perk! Order Now. Parmater Products-8NX-Lansing, Mich. — = Say You Saw It In QST—It Identifies You and Helps QST

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Seventh Edition Just Off the Press ROBISON’S MANUAL OF RADIO TELEGRAPHY AND TELEPHONY Completely Revised and Up-to-Date Of the 6th edition of this book reviewed by QST it was said this is perhaps ‘“‘The Best Radio Book That Ever Came To This Desk’’ The standard Navy book on radio originally prepared in 1907 by Lieutenant (last year Admiral and C-in-C of U. S. Fleet) S. S. Robison. The 6th edition and the present edition revised by Commander S. C Hooper, U. S. Navy, late Radio Officer, U. S. Fleet. Price $5.50 postpaid (former edition sold for $8.00) Address: Secretary-Treasurer, U. S. Naval Institute, Annapolis, Md., U. S. A. JACOBS ANTENNA SPREADER WHOLESALE DRICES Patented Sept. 6, 1925; Sept. 7, 1926 Both 5 in. and 7 in. diameters A universal device made of metal [ quick and efficient erection of 4, * wire Cage antenna or counterpoise $6 My Big 1928 Radio Book containe lat- developments in short wave per dozen; $3.25 for a half dozen | eee See CHARLES F. JACOBS, (2EM) P Brerytbing for ““Hame”’ at mhstesate 279 Park Place, Brooklyn, N.Y. AMERICAN AUTO & RADIO MFG. co. FREE Bept. 189 Americas Radio Bidg.. Kanses City, Me. To Our Readers Who Are Not A. R. R. L. Members Wouldn’t you like to become a member of the American Radio Relay League? We need you in this big organization of radio amateurs, the only amateur association that does things. From your reading of QST you have gained a knowledge of the nature of the League and what it does, and you have read its purposes as set forth on page 6 of every issue. We would like to have you become a full-fledged member and add your strength to ours in the things we are undertaking for Amateur Radio, and incidentally you will have the membership edition of QST delivered at your door each month. A convenient application form is printed below—clip it out and mail it today. American Radio Relay League, Hartford, Conn., U. S. A. Being genuinely interested in Amateur Radio, I hereby apply for membership in the American Radio Relay League, and enclose $2.50 ($3 in foreign countries) in pay- ment of one year’s dues. This entitles me to receive QST for the same period. Please begin my subscription with the issue. Mail my Certificate of Membership and send QST to the following name and address. Grade Operator’s license, if any Radio Clubs of which a member . Say You Saw It In QST—It Identifies You and Helps QST

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HAM-ADS sho you fect aer that Murph; TO $8.13 ing-Dr $51.06 Compact Disco Benjar Daver Silver-M former week ly zines two rm Luther PURI brass 1% "x6" $ lead $ stee! Ib. 35 2.7” w Jan. Q Air Pp path Schulz FIRST inquiries WANTEI! tion for St. Ia ESCO Norris meter $4.00 e 4014 A FOR HAMS made Wells TWO erating 92 Pr WESTON 34 NOTICE issue of QST the policy of the was altered to conform more iginally intended that this de will be conducted strictly as f the American Radio Relay will be accepted under ng will be accepted only rican Radio Relay League the advertisement must be the ber or his officially assigned ment from an individual can f QST, and the advertise words e of a nature of interest to nters in their pursuance of character will be accepted, arrangement, such as all or ed which would tend to make t from the others is Te per word accompany copy th of second month preced- Remit- AC. Motor generators any capacity to 5KW. Navy portable transmitters complete with power units, Navy Wavemeters $45.00 Sangamo Ampere meters designed for battery use $10.00 CN 240 1,000-10,000 meters $45. Ws inghouse 27.5-350 volts .08 amperes $18.00 % KW 5 eycle transformers $12.50 Henry Kienzle 501 East 84t! Street New York. FOR sale—GE 24/1500 and Esco 12/500 25 watt dyna- motors and also GE 8/600 double current generator. A in good condition. Cheap. K. P. Chai, P. O. Box 199, Kohala, Hawaii DODGE Radio Shortkut fixes signals in mind to stick Users report rapid advance to 25 per. Also state Intensive Speed Practice (as follow up) most efficient speed booster known and Morse Shortkut eliminates code mixup, 8BEO Kinnan “Shortkut best and easiest method known. Had previously tried phonograph records, automatic senders also buzzer without success.” 6BTY Cacho “Shortkut produced license for me in two weeks—present speed 2 per.” Reports on request. Radio with Appendix and Better Key Work $3.50. Speed Practice $2.50. — $2.50. Money Order. Foreign add fifty cents. No C. O. D C. K. Dodge, Mamaroneck, = “S” Tubes, Omnigraphs, Vibroplexes, Teleplexes, Natro- meters, Transmitters, Receivers, Chokes, Meters, ee formers, 50 watters, Motor Generators, Bought, sold, « changed. L. J. Ryan, 9CNS, Hannibal, Missouri. BARGAIN—Short wave transmitting and receiving ap- paratus. Send for list. B. L. Hinnant, Wilson, N. C 1000 WATT 40 volt generator, perfect, ring oiled, $40 1500 volt dynamotor, extension shaft, new $40; Jewel! filament voltmeter; 2 mike condensers 75c; microphone $1.50. E. W. Reiss, O’Fallon, Illinois. plate power. Powerful per- r to dry cells, lead-acid, Bs, B rugged, abuse proof, that’s an rage, B-battery. Upset elec- kel connectors insure absolute solution (that’s no lye). Com- parts, chargers. Glass tubes, elements, pure nickel, anything pper enameled permanently per- ft. Silicon steel laminations for Details, full price list. Frank ’ Rockwood Rd., Cleveland, Ohio. vly—Aero Short Wave Kit, audios, $7.80: $25.00 Brown- : $85.10 Loftin-White Kit, sone kit, $6.68; $31.00 Modern Latest, original packages, AmerTran, Jewell, Thordarson, i-Leonard, 35%. On Sangamo, o, Hammarlund, Acme, Kodel, Camfield, Abox, Bodine, Magna- Ceco, 40%. Prepaid, Our more dope than all radio maga- $1.00; 52 weeks, $2.50. Over ta, circuits, prepaid, 25c. Fred ead rectifier elements holes drilled pair 1/16”, 1"x4” 18¢, 1”°x6” 15c, Sheet aluminum 1/16” $1.00, prepaid, Silicon transformer Ib. 25c, 5 Ib. 30c, less than 5 k 5e less per Ib., Not cut, strips nd copper ribbon, 7 sizes, see . minimum 10 Ibs. Postage extra. xe glazed porcelain 8” leakage r. 4 for $1.00 prepaid. Geo. graph No. 2, 15 dial new. All N tor generator in good condi- ibe. SBWD, 2131 Fair Ave., new sell or trade for dynamotor. ng. Mo. Ammeter $6.00. 0-100 milliam- A.C. volts $4.50, Two CX310s 0. All new never used. 8BET, Ohio. Edison transmitting cells. L[AWW. ind prices on printed call cards them. 9APY, Hinds, 19 S. gasoline engine power units gen- atts DC also 500 watts 500 cycles POSTPAID to licensed hams, set builders, and A.R.R.L members. General Radio 358 Wavemeters—14 to 224 meters —extra special $18.25, Aero 20-40 or 40-80 meter trans- mitting kits $9.20, Aero shortwave receiving kits 4.50 Jewell flush mounting for 3” hole alternating or direct current voltmeters up to 50 volts $5.80, thermo coupled ammeters, any size, $9.50, Abox “A” eliminators $24.25 Majestic “B” eliminators any type 30% off list price Special prices on Thordarson, Acme, Cardwell or any- thing you want at greatly reduced prices. M. L. Potter -9DMI—4410% Drexel Blvd., Chicago, Illinois. SELL—-Parts of transmitter. Write for list. 3812 Waldo Ave., New York, N. Y HAMS—Discount 25% to 40% on parts, sets, and tubes Myron Martien. Galion, Ohio. BRAND new $6.00 Pyrex insulated .0005 General Instru- ment SLF condensers easily double spaced $1.25. New R.C.A. UV202 fivers now $2.25. James Marinell, 725 Oak Street. Youngstown, Ohio, 8BEP POWER transformers—100 watt 350-500 each side $8.25 250 watt 550-700 each side $10.25. 700 watt 1000-150: each side $14.25. 700 watt 2000-2500 each side $18.00. | kw 2000-2500 each side $30.00. 150 watt filament trans- former for 50 or 7% watters $8.00. Guaranteed. C.O.D or cash. 9CES, F. Greben, 1927 S. Peoria St., Chicar: Til. . QSL cards, two colors, government post cards $1.90 per hundred, white cards $1.00. Real ham stationary at $1.40 per hundred sheets and envelopes, pad form. Postage 10c. Free samples. S8DTY, 257 Parker Ave., Buffalo, N 2BAV TESTED Stromberg-Carlson 3%, MFD. “B” eliminator filter condensers. $1.25 each. Fred Neuhardt, 208 Union St,, Schenectady, New York. JEWELL Meters, new, 25% discount. We stock Acme, Thurdarson, National, Cardwell, General Radio, Nathan- iel Baldwin, Crescent Lavite, Lynch, Tobe Deutschmann R. E. L., Allen Bradley, Yaxley, Philco, Signal, Bakelite Samson, Raytheon, CeCo, Pyrex, R. C. Grimes RGS Browning-Drake, Fleron, Branston, All-American, Fer- ranti. Aero Products, Acme Wire Products, Ward Leonard, Westinghouse, Eby, Victoreen, Lincoln, Precis¢ Hammarlund, and many others. We allow discounts to Hams, custom set builders and dealers only. Tell us what you want. A complete line of Ham and BCL ap- paratus. Specializing in the best parts only. No junk Roy C. Stage, Montgomery & Burt Sts., Syracuse, N. Y 1000 V. 300 W. Esco motor 110 V. single phase $95.00, 400 V. 100 W. Esco coupled to 220 V. 3 phase A.C. motor $25.00 400 V. 100 W. Generator only $8.50. 1500 V_ 100 W Western Electric motor generator. 2500 V. 2 kilowatt Generator double commutator, coupled to three phase 22! V. 1750 speed motor. 2500 V. 600 W. double commutator generator coupled to 110-220 V. 60 cycle single phase motor 1759 speed, Also many others. 1 mfd. Western Electric condensers 50c. New % H.P. 110 Volt 3500 Say You Saw It In QST—It Identifies You and Helps QST

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Radio Curtis, 5-A-Q-C, ind Inductance 6-inch turn 12c; h Te. Aluminum square foot 85c; UX-852 75-watters $32.50. “Ham- 1109 Eighth Texas hams :—dmmediate deliveries on it tubes 5.00. RCA 5-watters raphs $20.00. UV-208A $15.00. Aero- mfd Condensers $1.75. Citizens Potter 2000-volt 1-mfd Conden- l-mfd $3.25. Robert Curtis, 1109 Worth, Texas. R A SECTION copy in following address form only: ys Oriole Ave., Pawtucket, R. 1. 40 Norfolk Road, Brookline, Mass. Austin, 967 Columbus Ave., New t, Jr., Box 404, 3t., Brooklyn, 38s N. Prospect Park i Grove Street, East Street, Washington, D. C. eet, Atlanta, Ga. St reet, Miami, Fla. if, 2 W. Drachman St., Tucson, Brown, 6511 Romaine Street, Holly- 915 Hyde Park Blvd., Inglewood, i59 S. El Molino Ave., Pasadena, 63 W. Main Street, Massillon, Ohio, Packard Motor Speedway, Utica, Golden City, Mo. belong to members of the rs gang. Mail for them should be R.L.. Hartford, Conn. When oper- personal sines as indicated. 1BUD A. L. Budlong “bud” 1ES A. A. Hebert “ah” 1GO L. A. Jones “lj” 1KP F. C. Beekley “beek” 10A R. S. Kruse “lq” 1SZ C. C. Redimon “cr” itions RYTHING FOR ™ HOLSON ELECTRIC CoO. SYRACUSE, THE HAM nd for Catalogue.) FIRST NORTH ST. N. Y. TY © telegraph desk switch; $1.25 lower $3.50 Airplane flame roof key with coni transformer; 500 cycle type 426, ington Airplane quenched spark trans Batteries, 10 volts, 8 twin cells in Largest stock Government Radio in U. S. Send 2c stamp price lis’. SHOP. 20 South 2nd St., Philadelphia, Pa. $5 00 g material reduced FOR YOUR CONVENIENCE QST’S INDEX OF ADVER. TISERS IN THIS ISSUE Acme Wire Company Advance Electric Aero Products, Aerovox Wireless Allen.Bragiey American Auto American Sales Company American Transformer Amrad Corporation ave . Arcturus Radio Company, Inc. Application Blank @ Handbook, Auriema, Inc., Ad. Barawik Company Boutin Electric Company Brimberg & Orth Browning Drake Corp Burgess Battery Company Burton-Rogers Company Cardwell Mfg Cntral Radio Labs Chicago Radio Apparatus Co Cresradio Corporation Crosley Radio Corporation Cunningham, Inc., E. T. Cussen, J. E. Corp., Allen D Deutschmann Company, Tobe Dongan Electric Mfg Co Dubilier Condenser Co Eastern Radie Electrad, Ine Electric Specialty Co Elkon Works Inc E. & M. Radio Supply Co Ensall Radio Laboratory Fansteel Products Co Fast Company. John E Formica Insulation (€» Frost. Inc.. Herbert H General Radio Company Grebe & Company A jrishby-Grunow-Hinds (Co Gross & Company J Gulf Radio School Hardwick, Field High Frequency Hull & Company, Chas F Electrical Company Institute Tacobs, Jewell Instrument Johnson . F Electric Radio & Publishing Co Karas Klaus Loomis Marlo Electric Massachusettes Miller- Welles Company Electric ( Company Radio & Telegraph Company School Carbon Company National National Nicholson Electri Omnigraph Company Pacent Electric Company Parmater Products Company QR.S. Music QST Binders Radiart Company Company Company Laboratories Radio 2MA Company Radio Engineering Laboratories Raytheon Mfg Company Rectifier Engineering Service Sangamo Electric Company Scientific Radio Service See Jay Battery Company Short Wave Kit Company Shure Radio Company Southern Toy Company Sprague Specialties Company State Radio Company : Sterling Mfg. Company Stromberg-Carison Telephone Mfc Teleplex Company Thordarson Electric United States Naval Institute Utility Radio Company Vibroplex Company Ward Leonard Electric Co Weil's Curiosity Shop Western Radio Mfg. Company Weston Electrical Instrument Corp Wireless Specialty Apparatus Co. X-L Radio Labs Yaxley Mfg. Company Mfg. Co Say You Saw It In QST—It Identifies You and Helps QST

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And to keep the grid bias constant You’vE heard a lot lately about the use of the Eveready Layerbilt “B” Battery No. 486 as a source of power for short-wave, low-power trans- mitters. Here’s another way in which the Layerbilt makes transmitters more reliable, more economical, and helps make better DX records—as a “C” battery. Harry F. Dobbs, Director Southeastern Division, A.R. R. L., operating 4ZA at Atlanta, Ga., uses two Eveready Layerbilts on his transmitter, to put 22% volts bias on the grid of the oscillator, and 90 volts on the ampli- fier. “The ruggedness of construc- tion, compactness of size, and long life make Eveready Batteries partic- ularly adaptable for this installa- tion,” says Dobbs. “The batteries shown in the illustration have been in use more than six months and show no drop in voltage.” For amateur radio, as well as broadcast reception, Eveready Lay- erbilt can’t be beat. It is, as ama- teurs the country over tell us, the longest-lasting, most economical of “B” batteries. NATIONAL CARBON CO., Ine. New York San Francisco Unit of Union Carbide and Carbon Corporation Tuesday night is Eveready Hour Night—9 P. M., Eastern Standard Time, through the WEAF network. Radio Batteries ~they last longer Say You Saw It In QST—It Identifies You and Helps QST

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Quality Product Pattern No. I I7 lio Service Set Superior Service e men, equipped with Jewell radio service sets Pattern No.117, red to render superior service. They go out on a call with the that they can do a complete job of servicing. batteries do not prevent determination of tube or circuit trouble rvice men can carry a complete set of A, B and C Test batteries in ection of the Pattern 117. Pattern No. 117 is portable, compact and professional-appearing in two parts—-the lower having room for a complete set of test ind the upper containing a four-scale, high resistance B-eliminator tmeter and a three-scale milliammeter. The two instruments are nected, forming a first class tube tester, but either may be used alone t continuity and battery tests. possibilities of this set for service work are practically without for descriptive circular No. 1117. “27 Years Making Good Instruments” Jewell Electrical Instrument Co. 1650 WALNUT ST., - - CHICAGO Say You Saw It In QST—It Identifies You and Helps QST

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About Non-Delivery and ‘“Rub- ber Stamp” Messages By Blakeley E. Cross, 8ANX-8QU MESSAGE might better never be originated than A lie on the hook or go wandering around thé try like a “weary Willie’ for months. Per- s more attention should be paid to deliveries and to the quantity handled \ ease which seems to afflict some stations is the t or unwillingness of the operators to pay age for message deliveryin their vicinity but out of al or phone delivery range, and which for var r cannot be forwarded by radio. 8AN X-SQ' les a lot of these, especially late at night, Some about three states away willcall me with a _ nicé report (R9 plus wid FB DC OM!) to get me feeling when I know very well he’s lying—not beca r get a good report but because I’ve been work- mat v ity a night and know what to expect The he will proceed to unload messages for points within a shouting distance of his station. I hate think these ops are all tight-wads unwilling to finish a job after accepting a message for delivery it it looks peculiar to say the least There have been bright spots to be sure. The other ght 8SCFV at Gouverneur, N. Y. asked me to QSR Buffalo. However, on learning my location and find- r that he was as near as I he told me that he would get them off nearer their destination. May his tribe increase! The notation of good percentages of lelivery in the B.P.L. comments is FB. Why not give much credit for fifty deliveries as now for one hundred total, tho? Wouldn't it speed delivery? (We hope so and shall try it. Note change of B.P.I policy announced elsewhere in this issue.—Ed_) 8ANX-8QU is always ready to handle messages and accordance with the requirements of an O.R.S. If is not possible to relay effectively in quick time messages are promptly mailed. So far this month my score is one originated, two relayed and thirteen delivered Not a fine score or anything like it, but enough to illustrate my point. From time to time I have noticed suggestions for eliminating “rubber stamp” traffic Contrary to the general belief it has been my experience that many f these messages originate with the operators of ome of our best stations. Invariably the text con- sists of such hogw-wash as. “Did you get letter. Hope QSO soon. 73” with slight variations to several addresses. Far be it from me to how! about friendly messages but why not put some “meat” in "em. Then we wouldn’t need editorials on the subject of non- delivery, and that’s. not a rap at them either Let’s all see if we can improve our practises and is improve general conditions. In the case of a fragmentary message it often requires less transmission to ask for a fill on a sub- tantial part of the mesage instead of asking for several very short fills. It may also be pointed out that there is less possibility for misunderstand- ngs between operators in getting substantial fills. 3QM brings this point out and adds also. “On this much-discussed subject of using CQ let me say that I get as many answers to a short call as I do when [ serd a gross or more. I have, therefore, adopted a policy of never sending or answering an unduly ong call.” QS T FOR NOVEMBER 1927 P. E. Handy, Communications Manager 1711 Park St., Hartford, Conn. About Expeditions around. The Radio, WOBD has returned from the North. Additional reports on her sigs were received from KFZQ, nbBEM, nu9CCH and J. Bern- field, London, Eng The Morrissey, VOQ, has also returned, arriving at Sydney N. 8S. Oct. 1 The Bowdoin, WNP, will remain in winter quarters and inue to need amateur contact for many months A NOTHER month of good contacts has rolled WNP Hr msg fm Anatalok Bay Labrador WNP nr. 633 O 1 (via 1SZ) to A.R.R.L., Hartford, Conn. ring September the Bowdoin has ridden peace- illy at anchor here in Bowdoin Harbor, northern Labrador, known to the Esquimos as Anatalok Bay, while work was carried forward on the scientific ta ashore In a few more weeks, our station Ww b ompleted and we will be living snug and varm in our double walled house waiting for the big winter snows The Bowdoin will freeze in the ice about a quarter mile from the scientific station Radio WNP will remain set up on board ship all winter, making a hike through the snow and across the ice necessary to reach the main transmitter “Expect to have receiving equipment for all waves between 15, and 25,000 meters and a low power battery twenty meter transmitter, also under call letters WNP. The main transmitter aboard ship will be op- erated all winter in daylight on twenty meters with occasional evenings on 36 meters. I expect twenty meters to be a big help in making night operation unnecessary. As the Bowdoin will be practically un- heated, the gang need not expect to hear WNP often in the wee smal! hours. “September traffic moved largely through schedules with 1SZ, 1FL and 9AFA. These three stations did excellent work taking our traffic and keeping the members of the expedition in touch with folks at. home. I1KL also was a great help with New Enginad traffic until he took a job with WCSH and had to eancell schedule. Traffic totals for September: Sent 1143, Received 106, Total 249, all on twenty meters. “I would like to take this opportunity to thank he gang for their fine cooperation and many offers to make schedules for QSR of traffic. The policy at WNP has been to route all messages via schedules in order to receive answers with minimum delay and I am sorry that more schedules cannot be kept. At present schedules are daily with 1FL, 1SZ, 9ADG, SAFA, eb4WW and weekly with ICKP, nc8AZS, nclDD. “Operations of WNP this winter will be primarily to move traffic. Many QSO’s in the past have not been very social and this winter they must be made even more brief. WNP will gladly answer all calls and give QRK but then I will QSU if no traffic. This policy is necessary only because a radio transmitter burns up oil and our oil has to last during eleven months more of operation. “In arranging future schedules, only stations will be considered that can handle traffic smoothly without unnecessary signals. S8BFA’s article on traffic pro- cedure which led the Communications Department of September QST is a peach, I’m with him heart and soul on this QSZ business. A suggestion I would like to make from commercial practice is the use of AA for ‘all after’ and AB for ‘all before’, in asking for a fill. ‘Aa John’ meaning ‘please repeat all after the word John’.

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d during September on 20 meters: lacp laff laiq lajm lakz laqt lasu ibjk lbkp lbw lbyv lecz licfo lclm i! ifh 1ff lkj ikl Inv lqv iry Isz lvw : 2amh 2aol 2bac 2bev 2cvj 2gp 2md tbeg Sbaqz 38caq Shg 3jm 4qb 4rn 5apo Sake Sale Sayo Sben Sbfa 8bgn Sbkm Sees Scfr 8ejv Semb S8cpq 8cvj S8dea Siq Sve Sadg 9adn 9aex Yamv Yant ; Sve Sadg Sadn 9aex Yafa Vamv Yant bai Sef 9efh 9lb 9pe 9ux 9za ne-ldd idw ne-4fv ef-Ship eg-2nh eg-5ml -6td eg-6vp gi-2it eb-4ww eb-irs led ickp Imv 8cjv 9baz eb-4zz t regards to all. sig) Himoe WNP.” working WNP thru bad QRM. eg (gi) BRS42 gFNB, efR390, nu6BZS, (Springfield, Mass.) and Edwin i, Ore.) add reports on WNP’s A.R.R.L. Headquarters in addition reports—one from nearly every sta- as “worked”. Orel VoRQ to 8DME for the fairly complete mmunication during September which eard from Sept. 4 to Sept. 11. On ter contact was too poor for traffic m. VOQ hooked 2UO on 33 meters relaying was put through. Manley words of press fast, single and with UO got it all. M es were handled m the 18th, 14th, 15th, 16th and ving Heiser at the key on the 14th. OQ and 2U0 again clicked for a traffic ights at times cut sigs from R6 or was the banner night of the messages going through fast and nty of rag chewing on the side. Good jione on the 25th and 26th while the xchored in the Strait of Belle Isle gal On Sept. 28th some rush mes- lled by 8DME while VOQ was under- wildly in heavy seas, The next messages were handled on 20 meters hat answers could be sent through neter 6 p.m. schedule. One reporter nterview members of the expedition o” through 8DME had to be turned New York Times contract for all radio—a good stunt and too bad it en pulled off. A solid QSO for made at this time. »s a lot of credit for hard work in ugh to VOQ as the Morrissey neared N. S. It is believed that he finally » time of arrival there by copying that the information could be Putnam awaiting the Morrissey there. 1M and nu4RN report good QSO's and th VOQ during September. 3JM took word messages and the RS he got on gnal proves pretty conclusively that always necessary to do good work— UX210. SAQH, 6BFP, 9CCH and VOQ and forwarded cards thru Ha. | traffie on “20” including a message nuSAVY worked VOQ on Oct. 3. Manley has been taking a much shore (at Sydney) after one of the and interesting trips ever made by an have greatly enjoyed my trip (by proxy) ond sure will be glad to greet my xpedition when they return.” go to press a message direct from When the Morrissey was five hours she lost her propeller so it was neces- to Sydney for repairs. Suppose this » the middle of Fox Channel? The en below as received. Vorriesey (in dry dock at Sydney, N. S.) ME Nr 416, Oct. 6. Hartford, Conn. I am writing this re- n the warm sunlight with the tem- t's a great change for us after the its & clear days in the 60 we spent Chidley and its day in and day out f 32 to 40. this last month has taken us from our to Sydney, N. S. We left Fury and Sept MI 80 Hecla Strait the 3ilst of August, reached Cape Dorchester Sept. 3 and Cape Dorset, entrance to Hudson Strait, Sept. 5. We spent Sept. the 7th to the 18th in Chorkbok Inlet, Baffin Island and left the Strait the 16th. Belle Isle came into sight on the 24th and Sydney was reached Oct. Ist. “September showed a continuation of the bad weather of the last half of August, on the second I finally cleared the last of Captain Bartlett's press telling of our reaching Fury and Hecla Strait. The next day we picked up the whaleboat at Cape Dorchester with over 1300 words on the hook. It was impossible to even send out a position report until 9BEQ took a short message on the tenth. On the eleventh and twelfth the story of the whaleboat party went to 2U0; over 1000 words were cleared on the twelfth, this was in middle Hudson Strait, the latter part of the 14th and the 18th were no good but otherwise the nights have been satisfactory for communication. “South of Mugford, Northern Labrador, signals in- creased greatly in strength. I can appreciate now what a difficult place Fox Channel was for radio and how much weaker all signals were in that region. Contact with 8DME was kept up and a great many personal messages were handled by the faithful Heiser. He took a 700-word message sent by Don Cadzow, the anthropologist, on Sept. 25th, with only one word re- peated. “Twenty meters was used and considerable traffic sent on that wave even when the ship was rolling heavily. The effect that blanketed signals on 40 meters extended to 20 and no signals were heard even in the daytime. I want to thank all stations handling traffic for me. We are nearly home now so 73 fm VOQ (sig) Manley.” KFLF The Ripple is expected to return to Los Angeles in mid-October, Operator L. Elden Smith, (6BUR) sends word that a list of calls heard will be forth- coming for the gang next month. He reports com- munication with the U. S. A. perfect from Papete, Tahiti thru regular schedules. nulABA copied KFLF 500 cycles, R5, 40-meters, in early September. 4SL took a msg for Hq. reporting KFLF on 33.5 meters 8CQU and 9AUE report contact with the Motor Yacht Robador KFZQ which uses a wave of 37 meters with 500 cycle plate supply. QSL’s to the Robador should be add to the yacht’s base care Indian Harbor Yacht Club, Greenwich, Conn. 9BLD tells us by radiogram (thru 1LX and 1AUB) of working the whaler Hazan, VNK, Aug. 25. VNK was then 300 miles east of Japan bound northwest with a steady 32-meter signal. 9AUE worked the Sumanco, KDDH, first on August 11 and kept two daily schedules with her until she docked at San Diego. The Sumanco uses 40-meters and plies between California ports and the Canal Zone 8DLD reports another new one. xoaSMA is the barkantine E. R. Sterling. She left Australia three and one half months ago and is now along the coast of Africa near the Cape Verde Islands. Cards should be addressed to E. R. Sterling, care of the Berry Barclay Co., 88A Leadenhal St., London, Eng. A 500 volt dynamotor with one UX210 is used on 32.5 meters 8DLD says most of the traffic is for Seattle, Wash- ington. He has kept a nightly schedule with xoa5MA and says the traffic is in code groups of ten letters each, four groups to a message. xoaSMA usually comes on about 0400 Greenwich TAAT has been QSO consistently with WXR, the U. S. Cableship, Dellwood, which left Seattle, Wash., for Skagway, a while ago. Mr. Henderson, operator of WXR gave 7AAT the following in- formation: “We will be in Skagway 12 weeks. We are to repair a break in a submarine cable off coast of Skagway in 1200 fathoms of water.” WXR oper- ates on 42-43 meters, and has m.g. plate supply. WOBZ, the yacht Mimi, cruising in and around the waters of the Gulf of Mexico, will CQ from time to time on 111 meters, and listen for answers on 40 meters. The station is experimental, and wishes to communicate with amateurs. QRA is B. S&S. wa ex5AJJ, 207 City Hall Annex, New Orleans, QST FOR NOVEMBER, 1927

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CONVENTIONS AND HAMFESTS At the quarterly meeting of the Los Angeles Ses- ion, A.R.R.L. (Sept. 18) about sixty amateurs were in attendance. Carl Zint, operator of KNT, Zane Grey’s yacht Fisherman, gave a very interest- ing account of fishing for half-ton swordfish as well as telling about other incidents and features of his trip. Mr. George Wilson, owner of the Ripple, KFLF, gave a fine talk about yachts and their doings 6BJX and 6CMS gave a report of the work at the 4 R.R.L. booth at the Radio Show. Over 1800 mes- sages were filed at the booth. 500 were cleared from the booth station and amateurs needing a boost for the B.P.L. were given 100 messages from the show. Other interesting talks were given by 2AKO, 6CHZ, and oz8AI. 6AM functioned as chairman and is indebted to 6AVJ, 6BJX and 6CHZ who planned and srranged the program. The next A.R.R.L. meeting is to be arranged by the Pasadena Short Wave Club and the succeeding meeting has been turned over the Whittier gang who asked for the opportunity D. C. W. Staging one of the most successful hamfests of its career, the Santa Clara County Amateur Radio Ass'n was host to nearly 130 amateurs from the East Bay Section on Sept. 29. A program of entertainment which started with six professional acts was ar- ranged by 6BHY. Talks by Supervisor of Radio Bernard H. Linden and by Ralph Heintz proved of great interest to every man there. P.W.D. The biggest event in the Illinois Section in August was the ham-fest conducted by 9EAI at Kankakee. A rip roaring good time was had by the 123 who uttended. Governor Small personally welcomed the gang and the entire town was turned over for the event. These get-togethers are held several times each summer for the purpose of promoting good fellowship and are non-technical. White (9EAI) is to be complimented for the 100% way he put this meeting across. The gang all want to thank him. Incidentally, this is a good suggestion for other Sec- tions—hamfests and social get-togethers go well at time cf year NEW B. P. L. POLICY With the good traffic season here and many more stations on the job than before it becomes necessary to raise the requirements for the Brass Pounders’ League. Plentiful traffic makes it just as easy to make the B.P.L. as ever, particularly if you go about by establishing a few regular schedules with the most reliable stations that you hear. Effective with December, QST the B.P.L. will be made up of stations whose message totale equal or exceed 200 OR whose deliveries made either in person by phone or mail within 48 hours equal or exceed 50 Note that.either a total of 200 or proof of 50 de- livered messages is sufficient to rate the B.P.L_ It is necessary to keep the message file ready for cal! by the S.C.M. at any time but not necessary to send messages » him unless called for. Please remember that mes- sages held at your station for more than 48 hours jon’t count in the total at all. All set for some snappy work? Let’s go! CLUB ACTIVITIES Full information on what the active radio clubs are doing is sent in bulletin form regularly to the affiliated clubs—or to any members interested in club work on request. Club secretaries are requested to send in any material they would like to see in the bulletin. Here is a chance for a discussion of your club problems and a good medium for the exchange of ideas between clubs. Another thing before we get off the subject, articles f general interest about clubs are wanted for QST. Finding a Concealed Transmitter” appearing on page III of September, 1926, QST, and “Some Con- sideration in Organizing a Radio Club” on page 51 of July, 1927, QST are good examples of what is needed. What is your organization doing that is new and dif- ferent and interesting? Information for both our new club bulletin and for QST is needed so that all our clubs can grow and profit by each other’s experience QST FOR NOVEMBER 1927 BRASS POUNDERS’ LEAGUE Call Orig. Del. Rel. Total 6CVE 1842 -= — 1842 6AVW 825 — _ 825 6AJM 121 7 646 774 8EU 38 66 346 450 6BHI 110 50 266 426 8AVK 31 35 350 416 6BZC 14 23 301 338 6RJ 20 44 262 326 sDHX 96 16 194 306 9AAU 294 — — 294 6ZBJ 6 9 252 267 2CEP 47 26 192 265 8CMO 26 23 216 265 6BIX 94 103 60 257 sCDC 7 7 198 232 oh6BDL 47 12 167 225 6BZN 2 6 216 224 3QY 78 33 113 224 8AKC 73 7 143 223 8SDNE 90 15 105 216 8CGZ 2 4 202 208 7U0 10 9 184 203 &8DME 31 68 102 201 8GI 13 33 142 188 &sCDB 47 18 118 183 2AMJ — — 178 178 9ZK 7 12 124 173 6CMQ 3 11 158 172 6CAG 12 22 134 168 8sCEO 13 30 111 154 6QL 9 4 134 147 6DAU 10 5 130 145 sDO0Q 23 16 104 143 9CEI 11 117 13 141 S9CIA 12 31 94 137 8RQ 30 11 96 137 1IP 28 22 4 134 7BB 10 123 — 133 7AM 57 48 24 129 sDED 65 7 44 128 1ACH 21 13 93 127 IFL 14 30 74 118 6RFP 7 2 48 117 SDKK 38 42 34 114 SRAT 7 2 41 113 6ALZ 10 9 94 113 S9AEG 16 do 50 112 spDLD 19 19 72 110 sDUD 50 20 40 110 SBAU 21 14 74 109 SDXZ 12 21 76 109 SADE 7 5 76 108 6DKX 7 6 28 105 6BQ 5 ad 98 103 sDBM 24 59 19 102 6AM 5 3 94 102 9DBZ-DZI 28 10 63 101 9PU 27 9 65 161 6BXN 19 4 78 101 IKL 5 95 — 100 SBEQ 10 6 94 100 Some of the “Radio Show” stations take the honors this month. You can tell "em by a look at the huge number of originated mes- sages handled. More about A.R.R.L. booth- stations will appear in these columns next month, The “regulars” are all on deck as usual and the “whopping big list” we asked for last month seems to have arrived. FB! Note elsewhere the new requirements to “make” the B.P.L. With the abundance of traffic and good fall conditions most of us can easily keep up our B.P.L. membership in spite of the higher total of 200 or 50 de- liveries necessary. We are thinking of listing the stations consistently in the B.P.L. sep- arately also—to give credit to those who keep up the good work 3 months and more at a stretch. How about it? Anyway, leis see you here next month, OM. Schedules will do it!

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-Meter Reports about 8.30 Ind.), “After a year on 20 meters e definite conclusion that this is r intermediate and long distances er had. On 40 meters it was pe, but now on 20 it is common worked five continents on ef, ei, en, fm, sb, su, sc, oa, oz, nh besides many ships. It is nsgs at a sitting from oh6BDL ip all night. The majority of of the gang notice seem to me und 12 p.m. I have seen few not come thru. Local weather make no difference, At any rate rang may look forward to a very ) meter band.” n.), “Twenty meters was much ber—not a single day but what hru. Signals from Europe are Worked twelve eg’s on one keeping daily sked with WNP show that 20-meter European 1d at 1300 GCT as six hours re eg’s come on the air at that have f.), “Am on ‘20’ entirely now the gang it is sure FB. ebiww, *’. CR10, ne4CP, saDA9S, oh6BDL, all districts any night.” For a month 20-meter signals stations few. Since Sept. 19 it and I have worked saDA&8, giving 2AC the dope on get- nf, mr, np, sa, sb, sc, eb, ef, eg, me of my DX on ‘20’.” alis, N. Y¥.), “Re the reports in to tell eb4RS that he doesn't s on ‘20° in the morning (0600 h of the poor beggars as are me haven't tumbled to the fact be as good QSO on 20 with ght-dark line is between us as ne is between us. When the early to realize this there will be 2). “Twenty is sure FB for good take it from the Ist dist. and early any time of day between CST. Have worked France and as 12.10 p.m. All stations are r than a month ago. ‘20’ is the es are getting more steady and Yours for 20 meters!” lowa), “Have noticed the same Z refers to. Jsually, East coast p.m. C.S.T. and Western up. During fair weather the later while in or just before a Notice the same on 40 meters in a ts not count our successes on ‘20’ ires and find out why they are me ham Center, Mass.), “After 10 p.m. graveyard until oh, oz and oa sta- pound thru fine at this time. That me fine traffic schedules with 20R FB! Have worked 24 different stations. Have had good sport our 9th district stations between S.T. and fail to hook *em. Some ever worked a foreigner and get a te! them about it later on. Hi! Most t know there was anything above resent the eg’s work between WIK YX tells me that the Post Office will go back up to 23 meters. QSO’s » due to fewer harmonics and mush ed gwi8B Oct. 4 thru bad QRM from IAI heard down on 21.5 meters the are all coming down slowly but BROADCASTING STATION nges and Additions al Standard Time) Sun. Tues. Fri. (18.97) Sat.; 5YD 3 pm Sun., pm 8 pm Wed., QN (41) 9:30 pm.; 8EQ (38.75) 6 pm NOTICE This month we are sorry to have to mention resignation of the S.C.M. of the Philippine Sectic of the Pacific Division. Mr, Felizardo, oplAU, | left the Philippines to attend Cornell University a Ithaca, New York appointing Mr. Jose E. Jimen oplAT, 835 San Fernando St., Manila, P. las A ing S. C. M. until members of the Section choose successor by nomination and election. Good rem are coming regularly by radio from the Philippir and all active stations there are requested to coo] ate with Mr. Jimenez in keeping the Section at front in A.R.R.L. affairs. All good wishes fr “the gang” attend Mr. Felizardo in his post graduat work at Ithaca, Due to this resignation line-up previously existing, Section Communications Managers are hereby solicit from the following Sections: Petitions to be valid, must be fil on or before Noon, January 7, 1928 > vacancies in our petitions and to nominating Philippine Section East. Mass. Hawaii Del.-Md.-D. of C. Eastern New York Montana Washington Alaska Manitoba The closing dates for receipt tions in the Sections listed is previously announced or extended when to the failure of members in filing petitions in certa Sections. Petitions must be filed at A-R.R.L. He quarters on or before the time announced to be val The proper form for nomination was shown on pas 45 of April 1926 QST. The candidate and five signer of a nominating petition for Section Communicati Manager must be members of the A.R.R.L. in go standing and the signatures on the petition must authentic or the petition will be thrown out as valid. Members are urged to take initiative imme- diately, filing petitions for the officials of each S« tion now operating under temporary officials, so t! the work of organizations can go forward everywher without further delay. F. E. HANDY, Communications Manager November 5, November November November November November ! Noon, November Noon, November | of nominating pe given above either necessary d Noon, Noon, Noon, Noon, Noon, Noon, With the Route Managers By Lawrence A. Jones* VER since this Route Manager business started E we've been plotting and scheming to beat t! in which tt column could be arranged in order to give the traffic- handlers at large the benefit of knowing our schedules band, trying to figure some way It’s a mighty hard job, because our space is 60 ' limited, and there are so many schedules, but at we have hit upon an idea. How good it is remains be seen, Here’s the idea. All schedules, of course, are valu- able, but there is nothing like a daily one for clearing traffic in the most efficient manner possible. And s daily schedules are the ones that are going to be shown here in the magazine each month. In order to make things a bit easier, we will defin« daily schedules as schedules kept at least five time per week, thus allowing two free days to those w! need them. The five days must always be regular though. Now here’s what we have this month:— 80 meter band Pa. 8EU with 8GI Ellwood Cy. Pa. 8RQ Hazleton Pa. 8CGZ Wmsprt. Pa. S9BWT Washn. D. C. SDHX Deposit N. Y. 8CMO Wmsprt, Pa. Pa. 8CMO with 8AVK Montoursville Pa 3LC Phila. Pa. 1KY Cambridge, Mass. 8DOQ Huntington Pa. SEU Wmsprt. Pa. Pa. 8AVK with 8RQ Hazleton Pa. 8CMO Wmasprt. Pa. 8CFG Cranbury N. J. 8AWT Phila. Pa. to the Communications Manager. QST FOR NOVEMBER, 1927 ‘ Williamsport, Williamsport, Montoursville, * Assistant

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wood Cy., Pa. 8GI with SEU Wmsprt. Pa. remont, N. H. 1ATJ with 1LM Chelmsford, Mass 9LV Milwaukee, Wis. 9DBZ Rapid Cy. S. D Wis. 9DLD with Huron, S. D. 9DGR with fferson Ss. D. SDWN with 9DBZ Rapid Cy. S. D 9DGR Huron 8S. D 9BKV Akron, Ia. S9BVF Jamestown N. D 9CZC Blencoe Ia 9CEH Chicago I S. D. 9DB witt 9DBZ Rapid Cy. 8S. D 10 n er ban R. I. 1BQD with BVB Westerly, R. I AZW Pittsfield, Mas e, Fla. 4DU with nq5AZ Matanzas, ‘ a iNE witl »AZ Matanzas, Cuba 41VH Concord, N. C {AAO Homeste Fla {RK Miami, rk UO Atlanta, Ga Fla. 4CK nr2FG San Jose, C. R nqg5BY Matanzas, {BN Tampa, Fla iRK with iNE Jax, Fla Fla. 4BN with 4CK Miami, Fla iRK Miami, Fla 4AV Atlanta, Ga Wise, 9DLQ with 9BJY Racine, Wis lie, Kans. 9CWW with nniINIC Managua, Ni Dies Calif. 6AJM w 6RJ Oakland, Cal 6JZ Santa Barbara, Ca all that have been reported this time. You e that parts of the country are very covered, and that other parts are not even picture If you are in a part that is n ed as well as it should be, get busy and mak« » daily skeds, reporting them to your RM as soor uu have kept them for a week or two, to be sure are reliable. certain Last month we announced that 4NE was forced n his position as RM, due to illness. It’s a easure to be able to tell you now that Webb is yugh better that he will be able to carry on his ex- ent work, and Florida will] therefore continue t ve an active RM. In a recent letter, he says Another thing I have been trying to push, is the int of swapping messages locally, so as to speed very My idea is to use the other fellows’ sk« vhere they will speed up QSR.” It’s a good ice d it does work Ask 8EU! SDED tells us, “80 meters surely has a bunch of is working Every night I hear 10 or more in 0 Very FB.” Yes, 80 meters is probably abou he best sked wave there is, although 40 has advan- v4 when comparatively great distances are to be« ered. However, 80 is the least tricky and freakis! and of any of ‘em. and deserves to be the most opular for schedules Those of you who have beer forty and twenty exclusively for quite a while hav . surprise in store for you if you will try eighty for hour or so in the early evenings. Believe us, the inds as busy as a W. U. office IDLD seconds this motion with, f traffic on eighty, and it is an short-distance skeds 4 I “There is pler y excellent wave for Many fellows are talking about keds on 40, but I don’t hear much traffic there Other fellows say that 40 still is no place for the traffic handler.” We are inclined to believe the other fellow” !—except, of course, n the case of oreign skeds. IBQD, together with his SCM, 1BVB, has been sending some FB mimeographed letters to his ORS each ' ‘ mth, trying to pep them up More power to you He is of the opinion that both 40 and 80 meters should stressed over 20 as traffic and sked waves, as 20 is dit too unreliable Those of you who have worked twenty for any time know that a few dead days the fun every now and then. 8CEB says that he is going to run all his sk« meters as usual, and try to sé an example for on the rest of the Va. traffic handlers. Guess that ends things for now Take some of hese suggestions to heart,—and remember that this mn is not only for the RMs, it’s for everyone. 73 QS T FOR NOVEMBER 1927 ARMY-AMATEUR NOTES CORPS AREA—2SC, the CANCS re- The NCS of the SECOND sumed its schedules on Sept. 26. various Nets are: West N. Y., 8HJ;: East "NN, Y.,. 2ASE; Bronx, 2CYX; Manhattan, 2EV; Brooklyn, 2PF:L. L, 2AVB;N.J.,20U; NING, 3HW. Anyone who has constructed a short-wave receiver and trans- mitter for use on airplanes is requested to communi- cate with 2PF to arrange a test of same. THIRD CORPS AREA—3DBT is a new AA station in this area. Schedules were kept during month between 83SN, the Signal Corps station, and 3AHJ, SBPD, and 3HI 8SN is glad to communicate with any A.R.R.L. members calling them between the hours of 7 and 11 P.M. FOURTH CORPS AREA—tThe following stations ly been designated AA stations: 4TX, 5AX 4KZ, 4EI, 5AEN, have recetT t y hes iLX iGS, 4GI iBU, 5TX, 5TC 6ATN, 4SJ, 4HM, 4EA, and 40C EIGHTH CORPS AREA—The NCS, 5AIN, has been moved to a new location 5ZAE, the AA Repre- expects to get some kind « a Net organized entative state of Colorado TRAFFIC BRIEFS graph and radio op for the Humble wires cover several of the big cities Texas He sez when he gets an important h ham message he can shoot it over the com- any wires and get the telegraph op at the other end to deliver. Nice for deliveries, eh? You fellows who allow your schedules to misfire occasionally, read this: 8BNW recently kept all his skeds while having his eyes treated. His eyes were n such condition that he could not distinguish writ- ng. but he got his mother to read the messages while he hammered the key. Where there a will there is a way, in most cases. to him The Chicago Radio Traffic Association Cup and a pri of two sets of Chi-Rad coils will go to the amateurs handling the first, second and third highest number of messages for three consecutive months. The contest is open to all Illinois amateurs who are A.R.R.L. members. Get busy, gang. Also remem- ber that Nov. 5 is the date of the annual C.R.T.A. anniversary banquet with an elaborate entertainment program and speakers that no ham will want to 23C, the ib station of the Bloomfield Radio Club, was tr first U S. station to establish communica- on with f1-1AB in Liberia, having worked this station on Aug. 7 and 8 Seven messages were handled 1AB is being operated by Archie Hosier McCaleb, two Americans who are doing rad work for the Liberian Government Mr. Me- Caleb will be remembered as one of the ops with the R xpedition to South America 1d Sidney have probably worked ne-8AE ntly The QRA of this station has been the Grenfell Mission, located at St. Anthony, Newfound- land The operator, Fred Dearlove, moved, however, » Northwest River, Labrador, where he will soon station neSWG on 46 meters, 4 number of you be operating his new d also in the 20-meter band. Thanks are due 2HV 1 8AG for this information 8XAM During its flight with the National Reliability Air Tour, the Ford plane, 8SXAM, was worked by 5ACL, ‘SSI, SALK, SCAU, 8KS, and 9CKV, according to reports we have received. 8BQM and 9CJT report ‘opying signals from SXAM, but no QSO Although the plane passed through their cities, SBI-CXL, and SAXS say they were unable to hear any of its trans- missions A messages from the plane sent soon f Dallas, Texas, was received at HQ throurh 8AHC. 8ALK, 5ACL, and 5SI each handled a number of messages for 8XAM, and kept good contact for quite a time 5SI established communi- ‘ation with the plane when it was 50 miles from his of Pine Bluff, Ark., and relayed all dope by to the flying field where it was posted on a n board for the benefit of the waiting crowd. rk on the part of everyone deserves thanks and ngratulations after leaving v

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Our Section Managers Ww. J. PICKERING SCM Saskatchewan, en- tered the game in 1918. He at present operates and owns nefFC, and is mainly out for traffic. Mr. Pickering was born in England, and is 22 years old. He works in the Dominion Lands Branch of ROBERT S. MORRIS SCM North Carolina, en- tered amateur radio in 1921, and holds the call 4JR. 4J3R has participated in practical- ly all Traffic Department tests. Bob is 23 years old, and is bookkeeper in a music the Department of the In- store. terior, DEAN F. COTTAM SCM Se. Minn., first en- tered amateur radie in 1914 under the instruction of Dr. A. Hoyt Tagler. During the war Dean acted as instructor at the U.S. Navy Radio School, Cambridge, Mass. He has operated at WLP, has held pre-war DCL and post- war 9MX, and now has 9BYA on the air, His age is just 30. and he is mighty proud of his two youngsters. Dean is a dispatcher in _ the Northern State Power Co. AMB had the 19, and en- die in 1921, ve been the onal station. read and buat- Projector,” give this up radio before ears of age. F. J. QUEMENT SCM Santa Clara Valley Section, first became inter- ested in amateur radio way E. A. SAHM back in 1914, when he was coaxed by a friend to listen te time signals from NPG. His station, 6NX, was one of the first USA stations to be heard across the Pacific, and has been very active since its beginning. Mr. Quement has held various A.R.R.L. offices previous to his present one. He is 27 years old, and became a married man the early part SCM of So. Texas, is 32 years old, and a graduate of Southwest Texas Teachers’ College, and the University of Texas. He first en this game of ours in 1919, has held 5YK and 5XAV, and now owns and operates 5GW. Mr. Sahm is very active in lecal civic and social organ- izations, and is Principal of High Schools. He has held several A.R.R.L. offices be- of this year. He works in fore his present one. the Sales Department of the Standard Oil Co. MOIR lakota, entered in 1916 with k outfit. He nd )6€6thhe «same Rafe” does work for the ment Corp., and holds a Ist grade er’s license. He he alee has a which he FERGUS 8S. McKEEVER SCM Kansas, is well-known through his call of 9DNG. S9DNG came on the air in 1923, and has never been off for more than a month at a time since then. DX traffic the main interest. McKeever is a _ radio salesman for the RCA. en s¢ » for 16 years, RICHARD 8S. BRIGGS Former SCM East Mass., has just resigned his posi- tion and is operating at sea. He got the wireless bug back in 1916, but did not receive his first license un- til 1921. He owns and op- erates IBVL, and has oper- ated IXM at M_ I. T. He is a graduate Mass. Tech., with a B. S. degree in Elec- trical Engineering. D. J. ANGUS SCM Indiana, has been in the radio game since 1907, and joined the ham ranks in 1920. 9CYQ, his present station, is on the air for traffic and experimental work. Mr. Angus is Chief Engineer and Treasurer of the Esterline Angus Co. QST FOR NOVEMBER, 1927

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ATLANTIC DIVISION ESTERN NEW YORK—SCM, C. S. Taylor, W &8PJ—The reports this month show a decided increase over last month. 8CPC has a class for beginners and things are beginning to sizzle all around. 8UL, 8DE, 8NT, 8BAG, 8PB and others have pledged themselves for the coming year to make ama- teur radio more interesting than ever before. Ama- teurs in Niagara, Erie, Chataqua Counties are re- quested to get in touch with SUL for membership. The Rochester gang with its RCTA have also been busy and things around Monroe County look very bright. 8KS has been experimenting with a portable set. SABX will be in Rochester soon. The Mohawk Valley Brass Pounders are busy lining up new mem- bers so things down state will soon be buzzing in that direction. 8BQK handles traffic. 8CVJ and 8DME handled a load of messages. SDME says VOQ is near home again. 8CVJ handles traffic with WNP and VOQ and starts Army schedules this month. 8BYE says business is dull. 8TH, 8CPC, 8AOM, 8UL, 8GJ, 8ADE and 8NT are keeping Buffalo 8CDC makes the BPL this month. FB. 8DHX 8BCM handles many too. 8CNT is also busy with traffic. 8ANX and 8BMJ are work- ing tooth and nail to get in the BPL again. 8SAYU should get a RCC certificate, having worked 12 sta- tions holding communication one hour at a time with each station. Herkimer has been kept on the map by 8AIL, 8BLI, and 8CNH. Hudson Falls still has 8BIW whose efforts have come to the front SBAG and S8DKQ are very active. SABX, 8BLP, SDDL, and 8KS reported. 8BZP is back again. He is going to start a class for beginners so we can ex- pect radical changes. 8BFG works Australia with R6 audibility. SCNX and 8CDB are very active, the latter making the BPL this month. SAHC has kept Union Springs alive throughout the season. 8AKC and 8DNE have both hit the BPL this month. alive has a good total Traffic: 8AHC 6, 8AIL 1, 8AKC 223, 8ANX 29, 8AYU 52, 8BAG 8, 8AOM 43, 8BCM 69, 8BFG 6, 8BIW 10, 8BLI 30, 8BLP 18, 8BMJ 36, 8DQK 14, 8CDB 183, 8CDC 232, 8CNX 86, 8CNT 23, 8CPC 13, 8CVJ 8, 8DDL 35, 8DHX 306, 8SDME 201, 8DNE 210, &PJ 14, 8UL 12, 8TH 4. EASTERN PENNSYLVANIA—SCM, H. M Walleze, 8BQ—Well, men, we were THE traffic push- ers last month. Fine work and many thanks. Keep it up, but be careful of bum tfe. The Phila. gang is coming to the top fast. Don’t forget we have two good RMs trying to serve you on lining up skeds 3ADE came back strong and works 20 on the side 8BQE is busy with his books again but keeps on the air too. A 5& and 10 cent “tank” condenser keeps 8CGZ's QSB good when better ones chew it up. Tfc sure picked up nicely for 83BFL. College don't slow 3NP much. 3ZM has his 80 m. xtal rig perking again. Our new ORS, 8RQ, starts in with BPL credits. 3KN is a newcomer on 40. 3QM sticks to 40, too. 8AVK built a new ham a receiver. The new are is work- ing at last at 8CMO’s. SEU put an auto starter on his. 3QP deserted 40 and is out for an ORS on 80. 8CCQ@ is back at 8XE for the winter. Break-in is FB for 3QY and traffic better. 3AKW handled a load of them with WNP. A 50 watter is popping off on 40 FB for 3BVZ. 8AWT says he will be in the BPL next time. A new Oakland roadster has 35M’'s time taken up now. 20 was bum for 3BGG until the last of the month. College is taking most of 3NF's time again. 3HD still has to work too darned hard at work. Tuff, OM. 8BLP blossomed out with his xtal rig rebuilt in FB shape. 3HH is doing hi-speed work with 3QY SAVL is building a 100 watter for 5 meter work exclusively. 83AKB is a new one report- ing and did nice work. 3CDS is trying hard to get lined up on 80. 3NJ popped his Tobe 2000 volt con- densers on 1000. 8WJ was off awhile due to the death of his father. Sorry, OM. 8AFR is coming back after a long vacation. Trouble troubles 8ADQ again. This time his platexformer blew up. 8WH lost his nice call and had 8BYZ wished on him. 3LQ is working for a WAC on 40. 8CW is back at college and works WJBU-8DQG. Business kept SBIR off the air most of the month (YLs I guess—SCM) A raft of skeds is doing wonders for 3AFJ. 3AIY almost forgot to report. 3AFA has some very good skeds working, he says. 38LC is doing his part and 8BMS is QSO VOQ on 40 handling traffic. 3AFX is active. 8CBT wins the booby prize with his failure to report on time. Traffic: 8EU 450, 8AVK 416, 8CMO 265, 3QY 224, QST FOR NOVEMBER 1927 DIVISIONAL REPORTS 8CGZ 208, 8RQ 187, 8ADE 108, 8DQE 98, 8BQ 71, 3QP 54, 3SM 46, 8AFJ 43, 3BSM 37, 8CCQ 34, 3AKB 31, 83BFL 29, 3AKW 27, 3AIY 25, 3HH 23, 8LC 20, 3BVZ 20, 83HD 19, 3NP 17, 8CW 17, 3AFA 15, 3QM 15, 3BLP 13, 3NF 12, 83AWT 11, 8BIR 10, 8BYZ 9, 3BGG 8, 83ZM 7, 3CDS 6, 8AVL 5. WESTERN PENNSYLVANIA — SCM, G. L. Crossley, 8XE—A number of the stations being re- built will be in operation near the end of the month or by the time this report is in print. All of the ORS in this Section will have received a letter from the SCM and RM and it is hoped that all will do what they can to get the necessary information to the RM so he can get these schedules fixed up and the maps made up as well, so we can get going by early fall. 8AGO has been doing his bit of good work on 20 and sent in a complete scheduled list to the SCM for use of the RM. 8AMU has been QSO South America. 8VE is QRW at the Medical School but is all set for 20 over the weekends, 8DFY and 8APC have new transmitters on the air. 8CRK, 8DNO, 8CES and 8GI are rebuilding. 8GI never leaves the air during this work. SARC has a blown transformer and sync, both being repaired. 8CWT is helping newcomers to get started. 80J blew his filter. 8CYP says QRW and no DX. 8CFR has plenty of DX and fair traffic. 8BGW is one of 4 live hams at New Castle. 8DOQ has a number of good schedules. 8GK is on 20 meters. 8AGQ wants to arrange schedules with other High schools. 8DBL will be on the air soon. 8CEO has a schedule that he has had for nearly four years with 4JR. 8XE has prospects for a very good year with a number of operators back from last year and with a num- ber of freshmen here that were amateurs at home. Traffic: 8GI 188, 8CEO 14, 8DOQ 143, 8AMU 43, 8SCWT 42, 8CFR 42, SDFY 35, 9XE 23, 8DKS 20, 8AGO 19, 8VE 18, 8CYP 13, 8GK 10, 8BGW 10, 80J 8, 8CRK 8, 8DNO 4, 8APC 8, 8DIP 2. YOUTHERN NEW JERSEY—SCM, H. W. Densham, S 8EH—Only three men reported their traffic and operation this month—3ZI, 8CO and 3SJ, Listen. fellows, let’s get on the job. We can’t let our per- centage get a kick like this Every man make it a point to have a report in to the SCM by Oct. 26. 3ZI has two complete transmitters working now, one on 20 meters and one on 38.5 meters. Separate antenna are used on these sets. 3SJ is temporarily off the air due to transformer and rectifier trouble. 8CO’s signals are welcome on the air again after a dull summer. Traffic: 3ZI 6, 3CO 2. MD-DEL-D. of C.—SCM, A. B. Goodall, 3AB—3ALF is still using low power and is kicking out FB. Heexperi- ments some with fone. $3CAB has a pretty good total. Why not make the BPL, OM? 38CFG reported via radio Good work and keep it up! 83CFX is changing his plate supply to raw AC. 38ASO says his xtal transmitter is the berries. 3CGC has been off the air the past month but expects to be on in the early even- ings now. 38CE has been doing some good work on 20 meters Is QRW school now, tho. 3BK is now on the steamer “Chilore’, KFIW, and listens in whenever possible for the gang. Give him a call, fellows. Traffic: 83CAB 62, 3CFX 12, 3ASO 382, 8CGC 6, 3CE 7. CENTRAL DIVISION NDIANA—SCM, D. J. Angus, 9CYQ—9EGE, RM | for the 5th Dist., has his District reporting a higher percentage of his stations than any other in the state. It is up to all the RMs to wake up the stations that are lagging and to get new ones started as well as to insist on reports from all that are in rerular operation. 9BZZ is on 88 meters with two 310s in parallel. 9EJU is on regularly and reports that SAA of Lima, Ohio has moved to Muncie and put in a 50 watter. 9AYO is going to install a 50 watter soon. 9DPJ returned from a trip to NYC and is on regularly now. 9CNC has a new Zeppelin antenna and is getting out better than ever. 9CVX is back from Calif. and on again regularly. 9EEY has a new transmitter but blew the transformer. His YL is winding a new one for him. 9EKW has installed a new 852. 9AIN has two regular ops on duty now. 9AGW has rebuilt and is getting out fine now. 9CMQ is using a new 852 and reports fine work. 9AEB is going to put in a mercury arc rectifier. 9DBA is now vil

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watt DeForest tube. 9EAA for ORS. 9CSP has applica- i is getting his share of traffic on s on 20 hunting DX. 9CLO has arding grinding crystals and is itting them into effect. 9CYQ sontrol on his set. 9DSC is ex- w power. 1EJU 16, 9AYO 5, 9DPJ 21, /EEY 3, 9EKW 21, 9EGE 33, 1CMQ 18, 9AEB 1, 9DBA 22, 9ASX 8 9DSC 10, 9CRV 10, CYQ 34. M. D. A. Downard, 9ARU-—9BAN ORS. 9KZ is all set to work aving finished rebuilding his a new 60 foot mast. 90X- rk outside the U. S, with und a current feed Hertz. 93BWJ h oz-3AP on the night of the the results. FB, OM. 9ABR ORS note change of location. m France. The size of this reporting of ORS not men- the same ORS to report next ex-ORS. BAZ 30, 9WR 20, 9MN 10, Dallas Wise, 8CEP—8ZZ has stems for crystal control sets » ideal one as yet. SDED made nd is our star performer when CSI is using a 7% watter in 1it on 20 meters and says He was also QSO WNP. 9ANT He was QSO WNP using a he tunes by the burns. 8SY his 7% watter having been QSO spent part of his time as one Camp Grayling 8ACU was not e warm weather but wants the okout for him now. The warm in Pontiac, 8DIV being QRW wy helping a new station, 8CYT fall rush. 8AUB is busy again is at M. S. C. and pounds the and SAUB held a, meeting at all the Grand Rapids hams and have a real live outfit on the hat you will hear much of G.R. V is selling out as he is leaving NC is busy fiying and stirs the it The Detroit gang are busy nd had a nice exhibit. The old was much in evidence but was hy tone, the famous 375 meter 8SY 21, 8ZZ 24, 8AUB 26, 8BRS 8CEP 13, 8DED 115. Stork, 8BYN—As announced in g to have a traffic contest of veing donated by 8ALU, our own ‘hio said prize being a UX852 but strict. All ORS in Ohio are an ORS. Consequently, you ORS and have put off getting a nce This is not only to stimulate on the map for good ORS. There Ohio who would make good ORS ed so hurry up. The messages na-fide messages—all with a sem- amp type will be discounted. rned in at time of report each 8ALU, Dr. J. A. Carnes, 515 Ohio for check while reports All messages to be handled in sedure and marked from whom sent, dates, etc. Messages held count. Every message origin- ed, sent, or mailed will count as contest ONLY. Don’t turn your monthly report to the rinated that bear the stamp of ted in order to pad the total will only good messages. The Ohio the highest total for three con- the Traffic prize. Any of the may be used but any ORS re- nds or for any misdemeanor will that month. S8BAU has kindly ‘ompete because of unfairness to time on the air than he, because of his illness. A very FB spirit, OM. The SCM and the RM, 8ALU are not going to compete either but all are going to do our best to get all the traffic we can. LET’S GO and may the best traffic man win!!! S8BAU comes highest this month in traffic handled. 8DBM comes next making the BPL after a year’s absence. 8CQU did good work with Europe. 8SBNW comes next but is going to school now, 8DJV, a non-ORS, handled 67. 80Q handled much traffic west from the Buffalo Radio Show. 8CMB blew his plate transformer and is getting out with 4 watts input to a 350. 8ALU wants you fellows to co- operate with him in the RM work. 8CAU is surely going FB for traffic and is looking for more. 8AKO is QRV for traffic at SHB. 8ATL delivered a message personally to a YL, hoping to get a kick out of it He did—she was ‘cullud’. Hi! S8DSSY was on only two days but handled 27 msgs. S8AEU is too modest to say anything about himself. 8DJG traded his 210 for 8BTH’s 50 and BTH made him trade back. SAVB is QRW college 8CNO, our own OW, opera- tor, is now on with an 852. SAPB is runner-up for ORS. We are sorry to lose 8BEV, another good ORS He will op at 1YS for a while. S8CFL doesn’t say anything about his station. The gang have crowned 8BHZ as the “CQ King of Columbus”. 8AVX wasn’t on much because of moving. 8SBSR handled 8 on 20 meters on an 852 with indoor antenna. 8PL is most- ly after ‘furriners’. 8GL only says QRU. 8AQU has been vacationing but has his set going again now 8DQZ is back again but will be QRW school. 8ARW has been having tough luck but will be on consistently soon. S8DIA is on with an 852 now. 8BKM blew his 50 and is on with two 5 watters. The SCM is going to follow the rule of no traffic no mention in report but don’t forget to report if you don’t want your ORS cancelled. 8RN will be with us again this winter. 8AGS is also leaving us. Sorry to see you go, OM. Traffic: SBAU 109, 8DBM 102, 8CQU 86, 8BNW 7 8DJV 67, 8BYN 64, 80Q 51, 8CMB 42, 8ALU 8CAU 38, 8AKO 29, 8DSY 27, 8AEU 22, 8DJG 8AVB 18, 8CNO 15, 8APB 15, 8BEV 11, 8CFL SAVX 9, 8BSR 8, 8PL 8, 8GL 8, 8AQU 7, 8DQZ 6, 8SARW 6, 8DIA 4, 8BKM 4, 8ABK 1. WISCONSIN—SCM, C. N. Crapo, 9VD—9LV is still Milwaukee's best traffic handler, 9DLD now uses a UX852 and keeps nine schedules. 9BPW reports things picking up now. He has a sked with 9DLD and one with 9DES. 9BWZ keeps schedules and keeps traffic moving through his district. 9SO is now using voltage feed Hertz. 9SO is getting ready for a big winter. 9EK-XH has skeds with 9DLD and sce-3AG. 9EFC has been on for about three months now with a new set. 9EMD had RM 9DLD for a visitor at his station Sept. 25. Ex9ACM is on the air again with the call 9DHH on 160 meters. 9BWO worked ef-8ER, nq-2RO, nn-INIC and others in the U. S. and Canada. 9EHD has skeds with 9EMD and 9ABM. 9ABM, ex9AGV expects to be on more steady now. 9AFZ is on 40 as often as he can get on. 9EEF has a new pole up and is building a new xmitter for winter, 9BJY has just made some skeds. 9EGW has a low report due to moving the set. Will be on again soon with an 852. Traffic: 9LV 73, 9DLD 110, 9BPW 61, 9BWZ 54, 9SO 40, 9EK-XH 30, 9EFC 21, 9EMD 20, 9BWO 17, 9EHD 14, 9ABM 13, 9AFZ 11, 9EEF 8, 9BJY 6, 9EGW 5. ILLINOIS—SCM, W. E. Schweitzer—9AAW—This is Illinois’ largest traffic report to date. Congrats, gang, and keep up the good work. 9AEU is on the air now as power mains have been installed. The station was formerly using B batteries. 9AEG is us- ing a full wave rectifier using 2 216B tubes. 9AFB has been traveling through the country visiting the gang along the line. The YL at 9AFF has the call 9QV. 9AHJ was not in operation this month. 9ALK blew his transformer again so will be off the air for awhile. 9ALW had the station work- ing nicely when school started. He will pound the key at 9NV. SAMO is a new station reporting. 9ANQ promises to handle lots of traffic next month. 9APY reports his schedules going to pieces because many of the operators are going to school. 9AQA had a total of 33 msgs this month. 9AVP reported the owner of his plate transformer wanted it more than he did. 9AWX will be operating on 40 meters now. 9AXZ reports 20 meters FB for the west coast in the afternoon. 9BBA is on in the afternoon and attends the Friday and Saturday nite ham tours. 9BNA will operate 9NV this winter. 9BPX has schedules with 9BQH, 9HL, 90Q and 9EGE. 9BPX will attend Armour Institute this year. SBVP operating on 38 and 85 meters. 9BWL finished a RF QST FOR NOVEMBER, 1927

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amplifier set and promptly burned up the tubes. 9CCZ s operating on 80 meters. This is his first report. CEC will be on soon having moved to a new location s00 ft. above sea level. 9CEH has schedules with BQH and 9LV, 9SIA handled the most traffic r Illinois this month. 9CN was on but little. 9CNB has been too warm to pound brass. 9CNY reports easier to QSR west and south because of new tations coming on. 9CSB had empty socket trouble. CUH is a new station in Waukegan. He attended a umfest in Kenosha with 9CHS 9UY l off. is still BBR is not on much. 9CWC has been away most e month. 9CYN is going to change his QRA, but g a little operating at 91Z. 9CZL is going full now S9CZT is using a Hertz and tickling it a lone 210. 9DAF only started again this month. BI using AC but is building a chem rectifier DE is attending Northwestern Univ. 9DGA re- gs pounding in FB during daytime on 20 KK is back from his vacation and is amus a antenna with a 210 9DOX is regaining his th and will be on soon 9DSO is operating or vith two 210’s. 9DSU has skeds with 9CFN and MU 9DWP is pulling in big DX 9DXG is back hool again 9DXZ holds schedules with 8DRM ‘YY, 9SBWN and 9CYQ. 9DYD says his new mast ire worth waiting for /EAI suffered from the weather S9EDS had trouble with his re fier C is off the air. 9EGX blew his 210 and is on r with a 201A tube. 9EHK is busy getting back air. 9EJO is working all districts consist ntly oing out for a commercial ticket. 9LL gets DC on 20 with a chem rectifier 9PU has 9MI air at U. of Ill. 9MR is also at Illinois U is temporarily closed down but did very fine during the summer 9QD has been inactive rectifier : 9WJ sent his report by it was delivered to the SCM by two different » CRTA is going to hold its annual banquet Sat Get in touch with 9DYD who has the reserva- in charge Be there, gang, for a grand and ~ time Traffic: 9CIA 137, 9DKK 114, 9AEG 112, 9DXZ 109, Ty 101, 9APY 88, 9CEH 76, 9AWX 61, SEAT 61, AMO 57, 9WJ 55, 9CSB 45. 9AXZ 42, 9DSU 40, ACU 40, 9AQA 33, S9CNY 28, 9CNB 26, 9UX 23 DGA 22, 9DDE 17, 9BNA 17, 9LL 17, 9CUH 17, 9MI 5, 9EJO 15. 9EDS 15. 9BVP 14, 9CN 14, SDBI 13, AFB 11, 9BBA 10, 9IZ 10, 9DXG 9, 9ALK 6, 9EGX CZT 5. 9CCZ 4, 9ANQ 4, 9SAFF 8, 9DYD 3, 9DWP BPX 2. 9CWC 2, 9RWI, 2. 9DOX 1 DAKOTA DIVISION UTH DAKOTA—SCM, F. J. Beck, 9DB—9DZI- 9DBZ made the BPL in one week’s operation using separate transmitters in the 20, 40 and 80 meter and S9DWN is back in Pierre and keeps a bunch f skeds on 80 meters. 9BQV finds 80 meters fine i turned in a nice traffic report, 9DES is on stently. 9AJP nearly has his new xmitter go- S9DGR did some good relaying when his Dad went to Chicago. 9ADG, a new station at Yankton has put in a fine message report and is in line for ORS. 9DB put a gutter pipe antenna up on top f his house and FB on 80. 9CJS has a TP TG layout now. Also has 3 stages audio so he in hear DX 9DIY is on early in the morning. BKB is at school of Mines with 9DBZ and DZI. The IDWN-DBZ-GR-DR combination is working nicely 80 but can use more stations to complete our te net. Write 9DWN and he will arrange times. gets out I ns are being made for our annual convention now. Traffic: 9DBZ-9DZI 101, 9DWN 70, 9BQV 40, 9DGR 9ADG 24, 9DB 22, 9CJS 18, 9DIY 1. SOUTHERN MINNESOTA—SCM, D. F. Cottam, S9BYA (9EFK Acting)—This has been another month for tourist hams, many having visited the Twin City i surrounding stations. Hamfests at 9AJU, 9CYA, DGE, S9EFK an@ 9AIR have been the order of the vf past month. 9DGE had nec-4BT, 9AFEX. 9AM ard BW visit his station. 9BIY has left for school. FO sends two reports and will be QRW school. EFK’s op, Bob Thornton, is now RD, Wauban Plant, Schriever, La. 9DBC will be on consistently next month. Jr aay A-9BTW have incorporated at 6 ® \ Ss Minneapolis and are both going to the U. of M. 9BYA reports business QRM severe. 9BHZ turned BCL repairman. 9AIR is going to in- ta'l a 500 watt, 500 cycle transmitter, 9DBW has | ‘ rone to college. SDMA worked 275 stations ring vacation on 7.5 watts. 9DHP wants a 20 neter schedule with a 2, 5, or 6 at 7:30 am CST. 28ST FOR NOVEMBER 1927 9CBE will be on the 9CMB has left for Dartmouth College. beck with high power and a new 9DSH is back in Minneapolis. air again soon. ex9ELJ will be call. ex9DUL is now 9RB. are all inactive. Traffic: 9DGE 35, 9BIY 25, S9DBC 19, 9ELA-9BTW 12, 9BHZ 6, 9BXV, 9BZP and 9AUT 9EFO 25, 9EFK 19, 9DBW 6, 9AIR 6, 9DMA 3, 9DHP 1, 9BYA 8. NORTHERN MINNESOTA—SCM, C. L. Barker, 9EGU—9AOK is back on regularly and is knocking them dead with his new 75 watter. 9ABV has re- turned to the ether after a summer of considerable ND and promises great work for this winter sea- son. 9EGU finally got started back on the air by rebuilding S9CWA has been monkeying a lot with 180 meter phone but has had hard luck. 9CIY is also trying 180 meter phone. 9AKM, our northern-most ORS has got new fall _ sched- ules perking again and shows up fine as usual! 9EGN says he is going to the U and to Dunwoody Inst. so will be more or less QRW t will be on the air whenever he can. 9CTW blew fallen back on the old faithful 210 9BBT has just got on the air again after bt an 852 but has and DC a summer of working S9BMR says he is dusting off the old transmitter and intends to make things hum th fall and winter. 9EGF is doing his usual fall mates fidiene Incidentally. a lot of us are doing this same thine and no doubt, it would be a very good idea for all of us to take a day off and spend it things off and getting all set for real con- sistent QSO’s throughout the winter months without troubl Traffic: 9AOK 10 NORTH dusting 9ABV 31, 9CWA 16. 9CTY 14, 9EGN 3, 9EHO 2. Moir, 9EFN 9AOK 33. 9AKM 9, 9CIY 7, DAKOTA—SCM, G. R The SCM is planning to visit most of the amateur sta- ons soor 9CDO has been QRW for the last two month Has rebuilt his transmitter. 9DKQ is QRW keeps lots of schedules on both 40 and 80 meters. 9DYA is going back to 80 meters as QRM on 40 is terrible. 9BJV has been off quite a bit but promises to get going soon. He W i like a sked with a Canadian 4th dist. station as he has quite a bit Canadian traffic. 9CEI will be off the air for the next month or so while the ywwner goes east to get a degree, law this time. Traffic: 9BJV 5, 9BVF 40, 9DKQ 3, 9CET 141. and not on much S9BVF DELTA DIVISION RKANSAS—SCM, W. L. Clippard, 5AIP—The A Little Rock fellows enjoyed the recent visit from our CM, Mr. Handy but due to the SCM’s absence from the city until his arrival, I was unable to notify out of town members. Sure regret it, fel- lows, but hope we can make better connections next Our RM had a bad spell of malaria and consequently has been inactive 5JK is hich point man and going strong. 5ABI had his vacation and time went home 5CK worked Australia but handled no msgs. 5AVA, 5AJY and 5SS are three new ORS and are very proud of their certificates. 5AFR is months. 5AKF must have had What have the YLs done with 5ABD well leaving us for a few some more bad luck 5AQM and 5ER. The school marms have inder foot 5PX worked Honolulu and a ship in one evening on a lone 5 watter Let’s start in earnest this month, OMs, and see if we can’t lead our Division again Traffic: 5JK 40, 5AVA 29, 5AJY 17, 5AIP 4, 5SS 2. LOUISIANA—SCM, C. A. Freitag, 5UK—5AQF ys that his messages were few due to his being t of town most of the time. 5ABT is reported away on his vacation while 5WG has returned from pound- r brass on the SS Roanoke but has left again for hool SAQF has arranged skeds with him. 5EB avs he has changed his Hartley circuit to a TP-TG nd gnals are very much steadier 5NS reports } 852 getting out fairly well 540Z says things at h station have been slow until some excitement ed by his 5 watter going west It has been replaced, however SL is a new ham just getting urted ‘KH has been down on 20 meters with two 5WY is - d River operating aboard the SS 5UK is still handling nicht- watters Hustler on the y press schedu with SS Wawa of the Standard Fruit and oe hip Line 5QJ seems to have a hard time iding whether he will use a motor- nerator this winter or stick to the old slop jars. into shape for the for ORS. 5FX is x station applied tting his 5LV has SUT is coming now ge season

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2RM 5APA has a wonderful radio mograph party surveying geologically pi coast. SKH lacks only one more WAC certificate. 5WY and 5ML are 5NS 43, SEB 40, 5UK 25, 5KH 12, SCM, J. W. Gullett, 5AKP—5FQ from Chicago and he said that the large he didn’t find a ham there. ntry boys should stay away from big AIQ and 5AQU are freshmen at Miss. now. 5AGV and 5TC are seniors old timers who have operated 5YD years. 5AFV and 5KR are on the has moved, rebuilt and is going threatens to turn in a real report YD says he moved the set over to the and operated a few days but the wer have been condemned so he is for another place now. 5QQ will ‘YD for the next nine months. for an ORS certificate and sent in SCM. 6AKP has finally finished his eption of a little painting. API 5, 5ANP 4, 5FQ 9, 5QQ 15, HUDSON DIVISION K CITY AND LONG ISLAND—SCM, ion, 2CWR—Manhattan: 2KR is kept y between business and his YL but time with her to good advantage, de and a YL will soon be second ,AWU keeps the station going at on KGDC. 2EV has been at the Y. helping the rest of the gang from 2AMJ’s transmitter out of Garden which is an all steel bidg. me again and going strong. 2ANX e, rebuilding slightly. 2AMJ was show. < still gets along on the same 210s. from 2BBX. 2CYX is going strong back after a visit to the 3id dist. re sure was a sudden spurt in this in the number of stations report- back after a vacation but doesn't much this winter on account of manages to let us hear from him 2APB is going strong, 2AMI has all month but will be with us again been very busy handling tfe with f S. of N.B.A. 2PF has been very mateur end of it, at the Radio Show. e and going strong. 2CTY is trying vut all he gets is QRU. 2ADZ got | set and used brute force on it all over the adjoining lots. 2ABP is seashore and says he was really home- wsspounding. 2BAZ has had a very but is going to get at it again now. w station in these parts but an old alls of 4DX, 3PS-3AHE and several BDA, a new station, is now reporting a real live wire. I guess this will be the last month be heard from under that call. He ORS and going to school in Ohio. OM and the best of luck. 2ADA is motto “traffic first.” 2AGU has W work but manages to get on the air \We is still alive and making himself recently worked 225 miles with 22% » with his portable station. 2AYS watter. CEP has rebuilt the whole outfit ex- er. 2ABO is after an ORS and I get one with the new batch that will t three weeks now. 2AKR is home till likes to pound brass with the ham. hattan: 2ANX 9, 2BCB 17, 2EV 62, KR 33, 2AMJ 178. Bronx: 2CYX 42, rl. Brooklyn: 2BO 74, 2PF 2, 2CRB 2BRB 2, 2AVR 8, 2APB 8. Long 7, 2ATZ 65, 2AWQ 12, 2AWX 2, 2AGU Richmond: 2ABO 8, 2CEP 265, 2AKR NEW JERSEY—SCM, A. G. Wester, nth of Sept. was the poorest in traffic recorded in this Section and the SCM greater increase in traffic and number of stations reporting, Next month will find a few ORS missing their certificates for non-reporting. 2CW keeps things active in Caldwell and reports on al! amateurs in his territory. 2JC handles traffic with WNP. 2KA is the proud father of a new YL in his family. 2ASZ gets fine reports on his new 50 watter which steps out FB. 2ALM fools around circuits but likes TP-TG best. 2ANB attended the CMTC ani had a great time. 2CQZ helped WEAF get their new super-power station in action and in his spare moments, talks with oz-4AC. 2CTQ pushes signals to all remote points on 20 with a 210. 2CJX has the misfortune to blow his tubes. 2GV is now in a new QRA at 94 Mountainview Place, Newark which will be his permanent QRA. 2BIR has a new 203A and will be heard more often. 2AVK blew up his transformers when trying to use 500 cycles on 60 cycle transformers. 2QI had the power company fix up a leak transformer which made reception impos- sible. 2ADL is back from Atlanta and started off by working three continents on 38 meters. 2JX is very QRW BCL work. 2A0OP is attending the Radio Inst. of America to obtain a commercial ticket, 2BY is a new YL station located at Ridgewood, N. J. wh is on with a 201A. 2AAT works his Hertz on 4! with a 210 which steps out FB. 2CJD handled some traffic for WGY, reporting the Tunney fight R8 i: England on the 24 meter band. 2ARC has left th: ranks to attend college. 2AUH has a 250 watter perk- ing on 40 and 80 but will not be on much due t college work. 2AGN received a report from ai-2KT on 20 meters. Traffic: 2CW 11, 2EY 3, 2JC 4, 2KA 2, 2ASZ !1 2ALM 9, 2ANB 1, 2CQZ 6, 2CJX 6, 2AVK 13, 2QI 2 2ADL 12, 2JX 7, 2AOP 15, 2AGN 14, 2CJD 1 2AAT 2. EASTERN NEW YORK—SCM, Earle Peacox, 2ADH —2APD is the only station reporting. What is th: matter with the rest of E. N. Y.? Let’s see tome action, fellows! Traffic: 2APD 97. MIDWEST DIVISION OWA—SCM, A. W. Kurse, 9BK V—tTraffic has in- I creased considerably this month and the SCM certainly appreciates your fine cooperation, fe!- lows. Next month will find Iowa a well organized traffic state and going strong. Let's keep up th« good work, gang. It is with deep regret that we announce the death of Donald Shoen, 9GU (ex9CNB formerly of Goldfield, Iowa. He was killed in an air- plane accident near Goldfield Sept. 14. 9BAT is do ing excellent work on all bands. 9BWN will be go- ing stronger than ever this winter. 9DZL visited the SCM recently, and found the junk heap at 9BK\ scattered all over the house. 9BKV has been rebuilt and is now handling traffic on 76 meters as usual 9CVU is doing nice work on 40. 20 meters is used a lot at 9BZI and he reports a good total and some nic« DX. 9CZC is QRW arranging schedules by radio FB. 9DEA is back with us again after a long vaca- tion. 9EHN and 9AED continue to hammer away on 40 and 80. 9DOA left for school Sept. 12 and won’t be on much until Xmas vacation. 9AMG sports a new Hertz antenna. 9DPL says his tuners never work. Better build a Schnell tuner, OM. They never fail. Traffic: 9BAT 113, 9BWN 50, 9DZL 46, 9BKV 45 9CVU 27, 9BZI 20, 9CZC 19, 9DEA 18, 9EHN 12 9AED 11, 9DOA 6, 9AMG 2, 9DPL 1. KANSAS—SCM, F. S. McKeever, 9DNG—Quit« a few ORS and many other Kansas hams were pres ent at the state convention at Independence Sept. and 10 which was the big affair of the month. Severa! new ORS are on the way as a result of this conven- tion. Among them are 9BPL, 9DUG, and 9EFE 9CFN leads in traffic this month. 9CKV, 9CNT and 9CFW are all finding traffic scarce on 40. The latter is very QRW at college. 9BGX gives another plead for cooperation from the gang. How about it, fel- lows? 9BUY is still hitting it hard. He reports a new ham in the making. 9JU was on little due to moving his @RA. He managed to work Australia and be reported in England. 9CET has prospects for : replacement on his burned-out 250. Good luck. 9CLE has returned from a trip to sea. 9LN is going o' 20 and 40 as usual. 9DNG is to rebuild soon and have higher power and a couple extra operators. Traffic: 9HL 8, 9BII 6, 9CFN 56, 9DNG 11, 9LN 12, 9CKV 19, 9CNT 14, 9BUY 7, 9JU 2, 9BGX 7 9CFW 3. MISSOURI—SCM, L.B. Laizure, 9RR— St. Louis hams reported in fine style this month with 9AAU, QST FOR NOVEMBER, 1927

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9ZK, 9DUD aad 9BEQ making the BPL. Director Quinby’s station is going at least and he is QRV schedules. A big radio show accompanied by the usual St. Louis style ham participation boosted traffic totals remarkably. 9DOE reports he is still on board WNX on the Lakes and will stay until navigation closes in Dec. 9DAE is again on the air on 40, and is arranging some skeds. 9DHT has been shifting his hook up and getting started on 40. 9LJ is back on 40 and handling what traffic he can rake in. 9ARA is working all three bands. 9BQS just got back on the air with a new xmitter and receiver. We welcome another addition to our shut-in fraternity in the person of 9ASV of Jopline, Mo. who is working a 5 watter. He is confined to a wheel chair and would like to QSO the gang, requesting QSLs and QSOs. 9WV in Kansas City is also a member of the shut-in gang. 9LI arranged a sked with 9CNY and will be an ORS next month. 9BUL applied for an ORS and has BPL intentions. He has a sked with 9DKG of Columbia. The Kansas City gang held a hamfest and banquet at the City Club on the night of Oct. Ist. Capt. Birkhard of WVC, Fort Leaven- worth, 9DXY, our Director, 9ZD, the master of Ceremonies and a number of others spoke to the gang. Traffic: 9AAU 294, 9ZK 173, 9DUD 110, 9BEQ 100, 9DXY 25, 9BUL 12, 9DKG 11, 9LI 10, 9ARA 7, 9LJ 17, 9DAE 34, 9DQN 7. > NEBRASKA—SCM, C. B. Diehl, 9BYG—9CJT is still tinkering and not doing much traffic work except RCC. 9CNN plans to increase his power. YY says since his crops are all harvested, he has no ambish 9EEW is having his busy season on the railroad and not much time for radio after a session in the office. 9BYG is pounding his flatirons quite a bit and steps out occasionally. 9EHW has a dandy BCL business worked up and also QRW with his music 9BOQ is installing a new dynamotor and says that when it gets going, it will knock our ears out 9DAC is putting up the stick again and will be QRV in a short while. 9DUB has now been on for a month but expects to bust out shortly. 9BBS is experimenting with ORS rectifier tubes. 9BQR says the extreme heat of August, overtime on account of vacations at the office cause him to be QRW but to look out soon. 9CJI also blames the dent in his traffic total to the August heat. 9CDB sent us a nice report this month. Traffic: 9QY 4, 9EEW 2, 9BYG 5, 9BQR 1, 9CDB 6, 9CJI 3 NEW ENGLAND DIVISION HODE ISLAND—D. B. Fancher, SCM, 1B VD— R Not much to report this month again. We have a new ORS this month in the person of 1AQP. He keeps a schedule with 9CMI and has all the “ear marks” of a good relay man. Providence & Pawtucket:—IAMU is QRW at a BCL store and at WFCI but sends in a good total it the same. 1AQP, our new ORS, sends in a fair total for a starter. IAWE is still on 20 and says that he can’t find any traffic. 1MO is sure get- ting out but has been busy so hasn’t handled much traffic. Westerly:—IBVB has built a new rectifier and overhauled the junk heap for the winter and repor‘s are much better now. LAAP is going to devote most of his time this winter to experimenting. Good Luck, OM. Newport :—Activity seems to be increasing in New- port. Several new stations are being constructed and it keeps 1BQD busy coaching them all. Hi! Traffic: 1BVB 69, 1BQD 32, 1AMU 31, 1MO 13, 1AQP 11, 1AWE 5. Eastern Massachusetts, E. L. Battey, LUE, Acting SCM—This writing finds the gang getting down to business, making preparations for the coming cold weather. Nearly all O.R.S. reported this month— that’s what we want fellows! Traffic figures are rather low, probably due to rebuilding and overhaul- ing. l1ACH and I1FL lead in traffic. 1ACH, INV, IRY and 1ABA all worked WNP. I1RY reports sev- eral new hams in Taunton. RS8 to R10 reports from nines’ are something freaky sez INV (but he con- tinues to get ‘em). 10G says no traffic from 12:30 to 6. A.M. Any of you W. U. men want schedules with him? 1ADM is on 80 handling traffic and ex- perimenting with fone. 1LM promises to increase speed of his activities as wx gets cooler. The Eastern Mass. Amateurs Radio Asso. opened the season's meet- ings at 1KY’s shack—she served watermelon, cake and drinks. 1RF’s C.C. set still going strong. INK and 1YC are rebuilding. 1BDV is back at M.I.T. for the QST FOR NOVEMBER 1927 winter. 1GP is back on the air with a 75 watt outfit. 1ACH kept a fine list of schedules. 1AGS installed a 2200 volt pole transformer and is putting 2000 RAC on a 208A. 1APK has moved but is still in Melrose. 1ACA says he nearly lost interest last month in the ham game—don’t do that, OM, we need good tfe men. 1AKS of Chatham is attending Mass. Radio School. He lives near LAHV now and they YX together at night. What? 1FL says that 1BYV has a YL at last, and he adds that that is real news. 1WV is kicking out FB. The Boston Radio Show is in full swing. The amateur booth run by members of the E.M.A.R.A. and furnished by the Boston American is keeping the gang busy. The traffic totals next month should be very large at the rate the BCLs are sending “free radiograms”. Hi! I1FL, 1ALW, ISL, IRF, 1AHV and the rest of the fellows will be glad when it’s over. FL says if some pretty nice YLs do not appear at the booth he will be mighty disappointed. Cheer up, Don, there will be plenty. 1BVL left for southern waters on a United Fruit boat. We all wish him luck as commercial op and hope he is back with us soon. 1RL of Wollaston is getting ready for active winter. He joined U. S. N. R. F. and will take part in the drills during the coming months. Well, gang, let’s all send in our reports next month and make this the star section. Traffic: 1ACH 127, 1FL 118, 1KY 85, 1UE 18, 1LM 66, LADM 28, IRY 26, 1ACA 23, INV 22, 1AHV 8, LRF 7, 1WV 8, 1ABA 4, 1APK 4, 1GP 3, IBDV 3, IPB 8, 10G 3, INK 2, 10N 2, 1AIR 8, 1ASI 9. Vermont :—C. T. Kerr, 1AJG—Things are opening up fine boys as we have three new stations in opera- tion. There are now two of them going in the southern part of the State, 1EZ and 1NH of Pownal. Welcome fellows and thanks for writing me. 1BEB is on early evenings. 1BBJ sez good report will follow next month, fb. 1IT, our CRM, sez that he is going to start something PDQ. 1BJP gets the star with 34 messages, FB. OM. 1AC and I1AEY of Poultney are now on the air working together at exlAEY’s home. 1AJG is on now for the winter. Let’s hear from you other boys who are not men- tioned in this report. Traffic: 1BJP 34, 1IT 4, 1BEB 6, 1EZ 22. Connecticut—H. E. Nichols, SCM, 1BM—I1CTI worked overtime to keep up the work of the southern part of the state and leads the list for this month. 1ADW has been exceptionally active with schedule work and in spare time, he worked three Australians and Belgium within a short time of each other which is quite an enviable record. 1BHM has returned from his vacation and is planning to operate regularly on the 80 meter band and hopes to get everything run- ning smoothly before the winter season gets here. 1ACH kept a fine list of schedules. 1AGS installed a work and are very anxious to get some good stations lined up for this work. 1AOI and 1ALF have been very active in keeping schedules and have been a most reliable outlet for their section and are to be con- gratulated on their fine spirit of co-operation. Both will be ORS men before our next report and it is a real pleasure to welcome them to our operating staff. 1QV at Mystic, has promised to get things going up his way. 1ATG had the pleasure of a Navy cruise on board a ship equipped with a 2KW set that radiated 35 amperes of current into the antenna. I1ZL re- ports doing considerable foreign work and handled some traffic with WNP recently. 1CJX and 1BCA re- port that school qrw is putting them out of business and we shall miss your traffic totals. Can you not recommend someone to fill up the gap, OM, as it would be a real service and help us to keep your ection active? Traffic: 1CTI 86, IADW 75, 1BCA 36, 1ZL 36, 1BM 28, 1QV 22, 1MK 16, 1ATG 12, IBJK 9, 1AOX 10, 1ACD 8, 10S 4, 1BGC 2, 1TD 4, 1BHM 2, 1BQH 2, IBCG 62, 1VB 56, 1ALF 651, 1AMC 14, 1AEB 8, LBWM 6, 1ASD 6, 1VE 4. Maine—Frederick Best, SCM, 1BIG—IBIG was ex- tremely busy for the better part of the month paint- ing up the house and getting everything ready for a busy winter. As a result he did not make the BPL. 1AIT says the Maine gang have vanished from the 80 meter band, and that he has gone to 40 for a while so as to keep in practice. 1FP worked entirely on forty meters. He has been very busy, but hopes to be on more during the Fall and Winter. 1AQL reports working 9BQH on 80 metres, handling traffic. 1COM reports a new schedule with ICBH. He worked WNP, and his transmitter is now going full blast on 20, 40 and 80 meter bands. 1QY of Auburn, is sponsoring a Maine Ham Get-together and is hard at work at the present time clearing up the tangle in- XI tes a

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the thing across in good shape. BNL sent in a report via radio uppreciated. One does not have port, OM, so send us a report ST! 1KL is now operating at saken the ham game. I1ATV is has had to be-off most of the his business in shape. 1AUF t, and is working a little traffic X reperts traffic picking up in joining the Naval Reserve in FZ 77, 1BIC 50, 1AIT 33, 1FP IBNL 18, 1CDX 8. M, V. W. Hodge, LATJ—Traffic rease this month, perhaps due QRM Mr. Louis Jacob, 1IP, Manchester, has been appointed ts the aid of the gang in iles 1AOV, sent in his first a good total but didn’t have YRM cut 1A0Q’s traffic. 1JN hange in QRA. 10C is on in a big total. He has an wing a 210 and “B” batts. 1IP with a 201 A. \EF 84, 1ANS 51, 1AOV 27, 10C l, 1JN 4. HUSETTS—SCM, A. H. Carr, introduce to the gang two Worcester who gets the good hedules and a “(fine message nth and 1AQF of Spring- is in a good total. 1AGA with typhoid for quite a w and will soon be pounding reester bunch did not forget hospital. Worcester is going good hamfests, on Sat. Nov he Hotel Warren. All who are get in on a real live A.R.R.L. too busy with school to think much of radio now but will pound from the SCM’s station, when he has the 7QV has moved to Washington to attend the U. so asked tc have his newly won ORS ticket eancelled. Sorry OM. 7CK seems to be losing in- terest and has some apparatus for sale. TAAT-QT has been going strong with the 5@ and has been work- ing nearly every thing hearable. He had the pleas- ure of meeting Mr. Handy, Labor Day. Traffic: TAAT-QT 82, 7DD 14. OREGON—R. H. Wright, SCM, 7PP—Those who didn’t take in the Spokane 7th District Convention certainly missed the time of their lives. From ail appearances, fall activities have started in earnest. Many of the boys have rebuilt entirely, others have increased power, and improved their sets in general. 7AEK is celebrating the first anniversary of his 250. He sez shi’s still faithful altho’ most of the boys want her. 7ABH has been on regularly and in addi- tion is experimenting with directional effects of zep and fundamental antennas. 7GQ, an old timer, has returned from Alaska and will blossom out soon on all Ham bands with crystal control] (FB, OM!). 7MF works OA, OZ and OH regularly, and will, in all probability, this Fall handle traffic through his portable at Corvallis. We lose a good Ham in 7JC who is going East to be a nine, however, ex9GI has moved to Portland and has taken out the call letters 7AHS. He will combine stations with ncSBF and be on with 150 w. TAIX is. going back to O.A.C. and will have his set in operation there. 7VP has been very QRW YLs until school started, but between he and 7TACG keep the latter's station open for traffic. 7MO is installing a new 1000 V. M. G. T7FE has been on occasionally and will have 50 w. going soon. 7MV is going to install two 852’s (if the wallet holds out) using 3000 to 4000 on the pair, 7AEJ is a new station using M. G. 7ND is back on the air. 7MH has gone to college but will run his portable. 7TAJN is on regularly with a new rectifier system. 7YG, the O.1.T. school, was represented at the recent radio show and cleared traffic for the patrons. 7PF is a new ham and wants traffic. Although new at traffic handling, 7LT will do his best with his 50 watter. TOI used a 25-20 rifle to drill a hole for an antenna lead, he sez it’s fb, Hi! Traffic: 7YG 75; 7LT 26; TMV 16; 9. 7ABH 8, 7PP 8, 7FE 6, 7NP 2, 7™MO 10. WASHINGTON can be procured from A. W St., Worcester who is Secy. of Assn. under whose auspices the 1LAAC informs us that the old that he is trying to do busi- 0 meters. IAAL has got his . on 38.6 and 77.2 meters. 1AJM raffic with WNP. 1AKZ says ») meters better now than last hat 10S AE in Pitts- Three of t AMZ is A gh moony A will be 7BB and 7AM being the high men. Active stations sional week-end. 1AOF is going are on the increase throughout the state. Every- r a month in N. B. as a guest body evidently is bent on making the winter of 1927- be off the air 6 weeks. 1APL 28 the best yet. The number of new stations coming stion so was off the air a week. on the air are showing a welcome increase. Many untiring interest in all things hams are now at WSC and the U. of W. and get- m 1LC handled 4 msgs for ting xmitters going. The fellows are all enthused, 0 meter set going and says he is due perhaps to the annual get-together at the Spokane 1UM just got back from Ger- Convention. A reorganization in the ranks of ORS fine things about the hospitality is now under way and all dead material is being He has written an article for weeded out and live stations put on the list. Fel- hope all read it. 1WQ says he ‘ows who have been lax in getting reports in, please th the Army junk at Fort Mon- take note! Traffic: 7TUO 203, 7BB 133, 7AM 129, TACA 44, 1AJM 63, 1AKZ 3, 1AMS 2, 7AFU 44, TTX 30, 7MG 27, 7MZ 18, 7ACB 16, TAEV ‘1. IAPL 70, 1ASU 1, 1AWW 12, 14, 7FD 8, TVL 4, 7DT 38. M 5. 1WQ 21, 1ANI 52, 1AQF 18, 7AEK 9; 7TACG TAIX 1, 7MF 7, SCM, Otto Johnson, 7FD— the boys made the BPL this month, TUO, PACIFIC DIVISION rHWESTERN DIVISION Henry H. Fletcher, 7ST—Our old ck and is coming on with a new ef RM now so line your skids with retting lined up for tfe. 7TGW re- ) bt doesn’t like it. Hi! T7ACN noney to install 75 watter. 6AKM 7QA moved back to Nampa. 7ABB 7QP is op at TYA. TIW eg to ends. All you fellows who the SCM please do so at once dope. We have a lot of stations > ever heard of. iGW 3. W. Viers, SCM, TAAT—7FL arose Fever” and reported just in time ticket. He and 7ZU at the State report that they are going to watter on 40 meters using the call is requested to report their sig- still up in the Beartooth mall portable set. He will be on in this winter with a 7% watter HG the new Red Lodge station is HILIPPINES—SCM, (acting), J. E. Jimenez, op1AT—This report by radio from oplAT via nu- 6ANO nu-6BJX—1HR leads again as usual with reg- ular skeds north, south and east. He put up a new transmitter with lots more punch. IDR is second best traffic handler. He was QSO fo and eg. 1DL tries hard to keep skeds with 6BVY left by oplAU. Also has skeds with ac-ICRS. 1AT has not done much as he is very QRW. 1GZ sent a 250 watter west so is silent at present. Traffic: 1HR 436, 1DR 220, IDL 88, 1AT 31, 1GZ 10. HAWAITI—SCM, John A. Lucas, oh6BDL—This re port by radio via oh6BDL, 9CEI and 1KO—4DJU says his rectifier rectifies as he is getting DC reports from Nu. 6DCU is QRW school again but is going to get around that by using 20 in the afternoons. 2CFQ re- ports having had a nice time on the coast and having met a lot of the Bay district gang. 6BDL worked Op stations while nu6BJX was on vacation so has a big total. Traffic: 6BDL 226, 6DJU 87, 6DCU 13. LOS ANGELES—SCM, D. C. Wallace, 6AM— Thirteen stations made the BPL this month, with 6CVE, the Los Angeles Radio Show A.R.R.L. Booth in the lead with a total of 1842. 6BHI was kept busy QST FOR NOVEMBER, 1927 AFP is

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OA i. Ac nin A with traffic this month and his total shows it. 6BZC tried to drill some glass for his xmitter, but broke every piece. 6ZBJ handled a gob of traffic for the L. A. Radio Show, the San Diego County Fair and the State Fair. 6BJX QSO’d KFLF several times. His YL, on account of college QRM, was forced to choose between giving up radio and him, and she chose to give up radio. 6BZR rebuilt his receiver and got in the way of the Radio Show traffic. 6CMQ’s total was high this month due to Radio Show and Fairs School has started in and he can’t devote so much time to radio from now on. 6BHI says that 6CMQ is a real fellow ham and traffic man who knows what good operating means. He got great pleasure from a recent QSO. 6CAG had oh-6DBA for a visitor 6QL is going to be OP in the local BC station but will be on 40 and 20 same as usual. 6BFP tried 20 but NG. 6ALZ has moved back .to Whittier for the winter. 6DKX had a very bad power leak at his location for three weeks of this month and finally ran it down with a portable set in his car and had it cleared. 6AM has a good total, 6CTO is wing 7% watts now and is instaling a new super 50 watt station. 6BXD put in some very good work the L. A. Radio Show 6BTS was QSO nin Australians, 4 Zedders, also six Hawaiians and gav« Alaskan KHT the latest news on the Fight 6BVM bas some skeds with OA and OZ. 6CQM increased power to 75 watts and had sked with 6ZI it had break it. 6CQP denies the fact that he is some kind of a movie actor, he’s just a camera man 6AGR helped out with the Radio Show messages 6CLK says his best report was R7 in Australia. 6BRO operated 6WH at the Radio Show and is planning to attend the San Diego Convention. 6AI0O tried to QR1 the game but after three weeks, was ready to con back 6NW spent most of his time locating power leaks and having them fixed 6CXT would e t arrange a sked with someone in Chicago. 6AKW « take care of any experimental traffic to Aust. and New Zealand, routed his way 6BHR rebuilt h re- ceiver and it sure works hot now 6CHT had his Ford stolen but recovered it He had a visit from o23AlI at his station 6BGC is installing a 250 WE tube and with his Marlo Super Sync, it should be QSA in Mars. 6OR is back for the winter 6RF is taking his transmitter up to Stanford 6PY is be- ing transferred around a good deal. 6BUX has moved to Napa County. The quarterly meeting of the Los Angeles Section took place on Sept. 13 at the Elk’s club and began with a very fine banquet Director Babcock was not ab’e to be present as he is on a ruise to Mexico and possibly South America Car! Zint, operator of KNT, gave an interesting account of their trip to Tahiti. George Wilson, owner of the Yacht Ripple, on which L. E. Smith, former SCM, is now operator, gave an interesting talk about yachts and their doings 6AVJ, 6BJX and 6CHZ planned and arranged for the program. The Los Angeles Radio Show, was very fine and the A.R.R.L. booth, station 6CVE, was operated by ORS 6BJX and 6BXD and other operators for short shifts Approximately 500 msgs were cleared over the air. 6ALH won first prize for the best knowledge of CW theory, for the best bug fist and for the fastest copying in head and on paper at the recent Amer- ican Commercial Operator’s Union contest 6AM has received his WAC certificates—the only station having held that certificate in two districts Traffic: 6CVE 1842, 6BHI 426, 6BZC 338, 6ZBJ 267, 6BJX 257, 6BZR 224, 6CMQ 172, 6CAG 168, 6QL 147 6BFP 117, 6ALZ 113, 6DKX 105, 6AM 102, 6CTO 75, 6BXD 67, 6BTS 62, 6BVM 52, 6CQM 50, 6CQP 47, 6AGR 45, 6CLK 31, 6BRO 29. 6AIO 22, 6NW 18, 6CZT 14, 6AKW 10, 6BHR 6, 6CHT 5, 6BGC 5, 6OR 4, 6RF 3, 6PY 2. SANTA CLARA VALLEY—SCM, F. J. Quement, 6NX—Letters have been sent to all stations not re- porting regularly and unless each and every station reports, the district cannot function as it should Let's have* 100% cooperation next month. 6BMW with xtal control and water cooler rec- tifiers led the Section this month 6CLP, the old reliable, is leaving for Chicago and closing his station Good luck to you, OM. 6BNH is another station using TPTG with good results. 6AMM started the new month by taking 100 msgs from 6BVY for P. I. route. 6BYH had to resign as OO This job is open to anyone who can qualify. 6AZS finally re- ceived his WAC certificate. Traffic: 6BMW 62, 6CLP 6, 6BNH 2. SAN DIEGO—SCM, G. A. Sears, 6BQ—During the past month, the Silver Gate Radio Assn, installed a QST FOR NOVEMBER 1927 crystal controlled transmitter in the main building at the San Diego County Fair and handled traffic for any wishing to send msgs to any part of the world. The transmitter was built and installed by Wm. Burnett, 6BAS and made use of one of his own crystals. 6AJM has had his hands more than full with the program for the coming Convention. It’s to be the best ever! 6AVW, the County Fair, led in traffic, about 20 of the gang helping out. 6AJM handled the bulk of traffic this month. 6DAU is back again and piled up a nice total. 6BXN made the BPL for the first time. 6BXI is QRW at 6AAP’s radio shop. 6DCT is trying out ultra audion circuit, 6FP is on a three weeks vacation visiting 6AWQ. 6BAS is snowed under with traffic this month. 6BWI is bothered with QRM. 6QY works regular skeds with op38AC. 6BFE says no circuit works—is now trying MO 6BAM shot his last fiver and is QRV for a fifty now. 6CNK works late nights since 60P went college. 6SJ moved to 3605 Utah St., San Diego and is working in L. A. 6AKZ is still busy with BCL sets. 6CTP promises a good total for next re- port. Traffic: 6AVW 825, 6AJM 774, 6DAU 145, 6BQ 8, 6BXN 101, 6BXI 67, 6DCT 63, 6FP 31, 6BAS 26, 6BWI 16, 6QY 12, 6BFE 10, 6BAM 9, 6CTP 8, 6CNK 4, 68J 2. SAN FRANCISCO—SCM, J. W. Patterson, 6VR 6CCR finds little time to be on the air these days since he has entered the business world 6DAM is a onverted TPTG fan now. 6ASI has his 852 working th only 33 watts input. 6PN is a hard man to ocate, one month he is here and the next—where? 6CXI is still knocking holes in the other. 6WS is back in college again and boasts of a Zep antenna Many a YLs heart has fluttered since 6PW has been on with voice—let us in on the secret, OM. Old 6BUF himself is back again for good, we hope. 6DDN is rebuilding for the winter work—what’s the idea, Bill, Woolworth selling 50’s now? Hi. 6BIA seriously planning on a second op. We wonder? 6HH has five ops; the school station is to be opera- ed daily. 6GW is an aviator—just ride with him once and watch the telephone poles fly by. 6VR is building for the winter. 6DDN take note. Traffic: 6ADM 86, 6CCR 78, 6PW 68, 6GW 47, 6WS 19, 6CXI 15, 6BIA 11, 6VR 10, 6BUF 10, 6DDN 10, 6ASI 8, 6HH 4, 6PN 2. EAST BAY—SCM, P. W. Dann, 6ZX—Well, fel- OV only six cards received this month, perhaps he- ause some of you didn’t know that the SCM has take on his duties again. Kindly make all reports to P. W. Dann, 1821 Chestnut St., Berkeley, Calif. He wishes to thank J. H. MacLafferty, 6RJ for the tance lent him as Assist. SCM, during Apr., May, and July. He did a splendid job. 6APA, due o ill health and other duties, has resigned as Chief RM but says he will keep things going until a new ne has been appointed. There will be another A.R.R.L. meeting at the Alden Branch Library, 52nd & Telegraph Ave., Oakland on Oct. 27, Nov. 17 and Dec. 29, 1927. Those who missed the meeting of Sept. 22 sure missed some meeting. You can’t expect the SCM to manufacture news so send in your reports, OM. Some of the old timers are coming back again such as 6IP, who has a new Jr. op three weeks old. 6ALV reports very QRW with speed-boat but is going to try 20 soon. 6APA has a 20 meter sked with oh6BDL. 6AKC has 20, 40, 80 and 5 meter sets and carries on experiments on all waves. 6CTX has the new set now perking at his new address in Berekley and has worked eb-4WW. 6CZR says traffic down this month due to bad QRN and construction work. 6RJ says QRW traffic San Diego Fair from A.R.R.L. booth. Traffic: 6RJ 326, 6APA 55, 6CZR 22, 6ALV 138, 6CKC 12, 6CTX 8. ARIZONA—SCM, 6BWS lost a dollar to 6BTS on the Dempsey-Tunney fight. 6BJF reports a new ham inder 6CXW going on the air soon with 7.5 watts. 6BJF has been working good DX. 6CDU had to grind the valves in his gas engine which he is using with a generator for supply. 6CBJ reports a new ham, 6DLE with an H tube. 6CBJ is sorry to quit the ham game now. (YLs have sent many a good ham west—SCM). 6AZM just put MOPA on the air and reports indicate very steady RAC. 6ANO built a new receiver which is working FB. 6YB will soon be on the air again now that School has opened. 6DIB is doing good work with the 7.5 watter. 6DIE was in L. A. for the Radio Show. 6BJI is still off due to change in QRA. 6CAP is heard occasionally. XIII

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; ne on a new 75 watter. 6CUW’s ORS ed. 6DCQ is heard on 40 and 20 every O 71, 6BJF 36, 6CDU 60, 6AZM 3, O VALLEY—SCM, C. F. Mason, the State Fair Grounds, handled 387 week. 6FR is on the World Cruise. 87, GER 97, 6CKA 62, 6CDK 58. CM, C. B. Newcombe, 6UO—6ABM He has been away for some time some skeds working soon. 6BTJ m. sked at 7:30 pm. M 7, 6BTJ 7. ROANOKE DIVISION CAROLINA—SCM, R. S. Morris, 4JR— e ORS reported this month. Something »b . fellows—watch your step. cooperation, gang or somebody clse ‘OH is still off the air most of the time nth. 4SJ has been appointed Army- 40C has added another stage to trol set and reports it FB. 4AB is Christmas holidays. 4HV has been with low power on 20 meters. 4JR e between his crystal control and the Just now, the crystal has it. i, 4SJ 19, 4JR 17, 40C 10, 40H 5. cM, J. F. Wohlford, 3CA—3CEB ties getting ever summer slump waking up. He has been changing e amateurs who attended the Huntington nee. Middle row: Freemont Purdy, 8VJ; vids. CM t te right, back row: C. N. Lawter, Young, Jr.. 8DJN; E. L, Murrill, 80K; ogo, SAWM; Andy Timberiok, &8LI; 8VZ: C. 8S. Hoffman, Jr., 8BSU, Beyd, 8AFRB; Cecil Lamont, 8EL; Jack srranging for some skeds this winter. t the rectifier and receiver after get- the old shack from IT is now a Papa—says the new one summer vacation QSA 3WM worked ei-1IZA. 3TN SWS is using two 210s with 150 is still making alleged music for BCLs. S3UX is working on a new 1 receiver. 3AG was QSO naq-5RY, ef-8LMS, ne-S8AE. 8GX has just the old shack and expects to have the short order now. 3% is using He has written a bunch of fellows expects to make a big showing this he just missed the BPL by one hun- on the air again on 40 meters. 3KG ffer from YLitis. 3BGS uses a five s on as often as possible. 3BZ was and didnt get a chance to work the reaches out and is trying out xtal SAG 19, 3BGS 6, 3RL 2. AT WEST VIRGINIA—SCM, C. S. Hoffman, 8BSU— Although summer still seems to have gang, a few DX QSO’s have been hooked and still less traffic. SAUL is trying out Zeppelin antennas. 8CDV is working with a 202 on 80. S8BSU’s antenna blew down so he will be off for a while. 8AGO visited the Wheeling gang. 8DPO with a 5 watter works su-1CD and every U. S. and Canadian district. He is very anxious for an ORS appointment. 8ADI is a new ORS in Wheeling. 8SAWV gave up his ORS on account of school. 8BJG is going to the University of Cincinnati, 8CAU. 8CNZ keeps fine schedules with a number of stations. 8DCM is on daily at 6 p.m on 37.7. 8BJB has a new 50 watt set. Parkersburg hams are quite broken up over the death of 8CUP 8DNN of that city is quite active using two 201A’s. Traffic: 8DCM 20, 8BJB 18, 8CDV 4, 8AWV 1, 8CNZ 29, 8BBM 1. ROCKY MOUNTAIN DIVISION OLORADO—SCM, C. R. Stedman, 9CAA—This report goes to Headquarters by air mail. The SCM held it as long as he dared with the re- sult that several reports were received that otherwise would not have made it. Let’s get them in a little earlier, hereafter, fellows. 9CNL has resigned as RM in favor of 9BQO who resumes the duties at once. 9CAA has a regular schedule with 9CZC in Blencoe, Iowa, which is continuous to the east coast. The schedule with 6CLQ will be resumed as soon as Sted- man rebuilds the high voltage xformer that went west a short time ago. 9DSY works 9ENM, a new station in Pueblo, every Sun. morning on schedule 9CAA works 9BYC in Boulder at the same time. 9DWZ and 9DED have requested their ORS cancelled as school work keeps them too busy. 9DWZ has also resigned as OO. 9DQD is on regularly and desires schedules. 9BNB is a new station in Durango. 9CAT moved his station to the State Fair grounds and handled a lot of traffic but forgot to tell how much. The Pueblo fellows have started a radio club and report about 5 prospective hams there besides the ones already licensed. Pueblo promises to be a live man center. 9DGJ is QRW at college but gets in a little radio on the side. 9EAM is getting started again. 9CCM, the YL, handled a little traffic for a change and got quite a thrill out of it. 9CDE is on as usual. 9EJW is QRW school. Traffic: 9CAA 52, 9EJW 49, 9CJY 18, 9EAM 10, 9DGJ 7, 9DQD 6, 9CCM 4, 9DSY 20, 9CDE 12. UTAH-WYOMING—SCM, D. C. McRae, 6RM— Everything in this Section is coming along nicely and more interest is being shown all the time. More of the gang were able to be on the air this month and we expect to make a good showing for the coming winter. The radio club is putting on an exhibition booth at the state fair which should create a good deal of interest. The SCM’s station 6RM will be used with that of 6RR and other members of the gang. 6RM will be signed. 6BTX did the best work in pushing the traffic thru this month and reports good results with his two 210s. 6CL@ also did good work keeping schedules with 9CAA, 6CDU and 6BWT. 6RV is working on the 40 meter band and managed to put thru a few. 6BAJ has a new 203A. 6AIK put thru a few and continues to hold Ogden down 6CQL had the misfortune of stepping in front of a car and getting layed up for a while. 7DA has been put on the inactive list for the present as he has gone to Nebraska to school. No other Wyoming sta- tions reported. 7GR has applied for ORS and will make another new station for Wyo. Let's keep stepping on it, fellows. Traffic: 6BTX 55, 6CLQ 25, 6RV 16, GAIK 5, 6RM SOUTHEASTERN DIVISION LORIDA—SCM, C. E. Ffoulkes, 4LK—Traffic in Fla, was very light this month but the SCM is glad to see the way the fellows are keeping up their reports. He would like to hear some sugges- tions in regard to a Fila. Hamfest. 4CK is the ‘oscillating thing’ in traffic this month. 4NE has had to cancel all of his skeds by the Doc’s orders. 4BN has a hot sked with 4AV-Ga. Tech. 4TK is very conversant with Latin. 4DU kept a sked with oa5HG. 4RK is in the radio business and is very QRW. 4AAO has had a quiet month this time. 40B has worked 34 different Aussies. 4HY'’s UV852 eats 300 volts and likes it. FB, OM. 4MS is coaching a football team in his spare time. 4LK blew his 560 so no QST FOR NOVEMBER, 1927

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ee ras “VEs". trafic. 4TR has been on 5 meters and would ap- preciate reports on his sigs. The members of the Fla. Section extend their sympathy to 4CJ in the death of his wife. 4FM handled Paris-Miami traffic for Am. Legion with his 852. Traffic: 4CK 83, 4NE 28, 4BN 27, 4TK 22, 4DU 16, 4RK 16, 4AAO 9, 40B 8, 4HY 5, 4MS 56, 4LK 56, 4FM 24 GA-SC-Cuba-Isle of Pines-Porto Rico—SCM, H. L. Reid, 4KU. So. Calif.—4EI lost his 203A and claims that the 852 is some tuber. 4KZ is doing nice work and sends in a good traffic report. 4AAM has been troubled with his set so is buying a new outfit, Porto Rico: OM 4KD as usual looks after the PR gang. 4JE burned out Gen armature and is on with RAC and an 852. 4KT lost his H tube due to hen trying to lay in the transmitter. 4O0I is busy burning vuut AF transformers. 4SA is going full blast. 4JA turned commercial and installed WGI in San Juan. ‘RJ is busy fishing. 4UR is waiting for new arma- ture. 4RL YLe 999999999. Mayagues gang al! on 20 now and 4KD same as usual. Georgia: 4UO in Atlanta is hot after things and is going to make us a nice addition to the gang. 4GY is the most re- liable station now for traffic for Atlanta. 4RN has his set in tune with the lights and claim it takes all hie DX power. 4NQ is hot after Atlanta and Macon fellows for not being on for short traffic jumps. Traffic: 4EI 8, 4KD 5, 4U0 25, 4RN 3, 4GY 17, INQ 28, 4KZ 19, 4AAM 92. ALABAMA—SCM, A. D. Trum, 5AJP—5JY is pounding the ether every nite for several hours and is very consistent with foreign DX. 5AJP is on the air again and is stepping out fine. 5ADA saved up enough for a 6/400 V_ dynamotor plate supply and you ought to listen to his pure DC sigs. 5NL has one of the prettiest transmitters and re- ceivers in the South which perks just as well as it looks. 5ABS has been having plenty of trouble with YLs, BCLS, and his xmitter and says that he doesn’t get on as often as he would like to. 5ANE left for Ga. Tech. on the 20th but turned in a good report, anyway. 5DI also left for Auburn. This leaves Selma short two good ops but 5AV and 5VX will keep up the good work. 5AV is on regularly, work- ng consistently and handling traffic galore. 5VX s on most of the time but is having some trouble n getting out. 5AQW is now at Auburn and says that he will be on the air there soon. 4AQW states that the most active stations in Birmingham now are 5ARG, 5AXN, 5WQ, 5DT, 5MI and 5AX. 5ARG is an old ship op who is on with a 210 and a good RAC note. 5AXN is on now with a good DC supply and a 210 bottle. 5DT is on once or twice a week with his old 204 and still going strong. 5PD is a Jonah on bottles, having sent West half a dozen 210’s and several H tubes. He is now on with an old 202. 5MI is now finding more time for hammer- ing the key now as WBRC is settled in the Temple Theatre, Well, fellows, this is all this month and I hope that all the hams in Ala. will cooperate with me and send me a fine report the 25th of next month. Traffic: 5ADA 10, 5AJP 11, SANE 16, 5ABS 15, 5AV 12, 5AX 24, 5NL 45, 5JY 58, 5VX 6. WEST GULF DIVISION OUTHERN TEXAS—SCM, E. A. Sahm, 5YK— Reports are rather meagre this month. School . has opened and the summer slump is still with us just a little. Fellows, let’s all get our reports in next month and make a better showing. Remember your column in QST is going to contain just as much as you send to your SCM. He has not the ability to manufacture news. 5MS worked 15 Australians this month as well as OZ, EF, EB and Dutch and Danish ships. Anderson handled some Mexican Army mes- sages. 5AMG-of Houston asks to transfer his ORS to this Section. Send me your reports, OM, and your certificate and I will ask Forrest to make the transfer. 5ALA is inactive at present. 5EW says school QRM will keep him away from Radio some but his report is very good just the same. He still has his 250 going. 5AHP reported via WU. He reports 50X at Houston back from Europe and that 5AJS has gone back to the West Indies. There is little from San Antonio this month. 5WP moved to Amarillo and 5RR is in New Orleans in radio school. 5HS who is reporting this says that as soon as parts arrive, he will be back. Traffic: 5AHP 6, SEW 24, SARF-5AVI 82, 5MS 34. QST FOR NOVEMBER 1927 OKLAHOMA—SCM, K. M. Ehret, 5APG—Route Manager 5FJ is back with us ready to do his share. 5AMO says 12 bucks per day looks good to him and that he will stay in the oil fields until Jan. 1st but expects to have a set going there. 5VH reports that his QSO with nc-4CU is his first foreign DX. 5ABO is still working 180 meter fone at Tonkawa and says the Mayor, 5AS, has a 50 watt fone on 80 and 170 meters. 5ANT rebuilt his transmitter but since order- ing a 50, will have to rebuild the 7% watt trans- mitter for 20 meters and put the 50 on 40. 5AAV is getting out good with third harmonic on 40 meters. 5AFX is distributing the ether with 5APG’s 500 cycle. 5QL is still doing good DX when little 5QL doesn’t keep him awake nights too much. 5MV is ready to go on the air with 15 watts using Esco on 40, 80 and 180. 5AHT, formerly of Breckenridge, Tex. has 2200 volts mercury are RAC on two DeForest RO tubes using TP TG circuit and operating on 40 and 80 meters. 5ANI is completing a splendid station but the lattice tower is not up yet. 5BF is rebuilding his outfit. He has been working splendid DX on 20 meters. 5AQE is the only station in town in the UX210 class but gets out with the best of them. In 25 consecutive mornings, he worked 18 Aussies, 4 Zedders and 1 Hawaiian. Traffic: 5AAV 13, 5AFX 9, 9APG 7, SANT 40, 5ABO 7, 5VH 15, 5ZAV 4, 5SW 7. NORTHERN TEXAS—SCM, W. B. Forrest, 5AJT— 5AIV, 5SX, and 5PN have “phones.” 50E and 5KI are two new and active stations at Ennis, Texas. 5AXQ is a new station for Comanche, Tex. 5AHU of the same place will be off for a while due to college work. 5AYD and 5RO are active now in this Sec- tion, also. 5RG just returned from a trip to the west coast, visiting several 6’s and 9’s enroute, also, he had the pleasure of meeting 6AM and pounding the brass at his station. 5AXO is back with the gang again, located in Dallas. 5JD is active now with a 250 watter. 5ADT handled his two msgs. in 15 minutes. 5AMK is with us from Beeville, Texas. 5AQ is in California on vacation. 5ACL was QSO with 5RG while latter was in Frisco and Salt Lake City on his vacation trip. 5AXF formerly 5AO of Hamilton, is now with the Dallas gang. 5AMY, 5QS and 5IP are also on the map at Dallas now. 5AXO reports a new station being organized at Southern methodist Univ. at Dallas by the classes in E.E. at the Engineering School. FB, 8. Traffic: 5ACL 6, 5RG 21, 5AHU 3, 5HY 15, 5SH 13, 5JD 5, 5AXO 8, 5ADT 2, 5AMK 12,, 5ATR 37, 5ACL 4, 5KI 29, 50E 6 CANADA MARITIME DIVISION EWFOUNDLAND—SCM, Loyal Reid, 8AR— N (Via radio from 8AL) 8BZ has changed lo- eation and thinks he will get out better now. SBC ‘s plugging away but has made no DX yet. SMC reports being heard in Belgium with new trens- mitter. 8RG is also getting good distance. 8AR reports coming back on the air soon. SAW is build- ing a new transmitter for 20 meters. 8AE is reach- ing out also, as is SBD. S8AF is the star station this month with a good total. Traffic: 8AF 22. PRINCE EDWARD ISLAND—SCM, F. W. Hynd- man, 1BZ—1CO reports schedules with Brazil and has worked Argentina and Italy as well on 20 meters. 1AP is also on 20 and reports working eg-20Q on a bed spring for a counterpoise. He has a daily sched- ule with 2BR in Montreal. Traffic: 1CO 13, 1AP 28. NOVA SCOTIA—SCM, W. C. Borrett, 1DD—I1CC, who made a start two months ago in Dartmouth, has been transferred to Truro, N. S. where he expects to start up again soon. 1AR who has been the main relay station for VDE spends most of his time on top of the 40 meter band at 9 pm. 1DD has been QSO WOBD on 37.5 and handled quite a few msgs from him. He has a sked on 20 with WNP every Sun. at 4 p.m. 1DD has just returned from a trip to Montreal where he has arranged with some of the 2’s for skeds and visited the Montreal Radio Show. Halifax is talking of a radio show—if it comes off, the SCM will write all Maritime hams personally. xv

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~~ FO Hem - VANALTA DIVISION LUMBIA—SCM, E. S. Brooks, 5BJ— H er activities this fall, gang, so fix up th i let’s hear what you can do. Your SC) ry station to send in a report each n han the 15th. 5AV is closing down ar coast to attend school. 5BR says Ql ep him off the air. 5CT still has the 5GO sends in a good traffic total, r t being down and has to use funda- m ends in the report for the Victoria ga ne to N. Y. 5CE sold his MG to 5¢ heard in Bermuda on 40, hooked « \7) but QSS too bad to copy. 5AR i Camp. 5CC is too Q@RW to pound br newcomer. 5GF is testing with a 4 AL keeps the BCARA station, 9AJ, fellows, when you send the SCM forward, don’t forget the stamp, Hil ICT 3, 5CO 1. A. H. Asmussen, 4GT—DX con- oving and the contest is now on t and North halves of this Section. 4 ii taking a msg that originated in ( mack attending university and we b xe the splendid DX and experi- r ted last season. 4BC is busy on ed Hawaii again—what will he do " tles? 4FF sure is stepping out, } waii iGT is now on with a hay- a e AREA is doing good work. 4AG is getting active. 410 has power loing his stuff at Nanton. 4DQ is ) going strong soon. 4AF is looking ‘ half and wires in the report. 4BV nd is doing nice work. {HA 7, 4GT 3, 4FF 1. ONTARIO DIVISION M. W. Y¥. Sloan, 9BJ—A general evidenced this month by the : mus ORS and others in the way Many of the stations are attending sin on 52.5 meters each Wed. night ye very good work has been There are some new stations coming this vicinity and activity is bound ' the advent of Fall and cooler a orts that 8XI is back again and is t on with a new set. 83MM is now in 5 sbout ready to sit up all night and his new QRA. 8CS says there has joing in his shack lately. 8DH and says that he will not be on six months. 3IA forwards the re- it does not say anything about his 8CB has been on the air and The winter DX season was started f 24 of the gang at 9BJ’s summer Island for our annual get-together. » gang gathered on the beach and marshmallow roast over a roaring way home on the Ferry, the, fellows lea that a CQ would sound delightful the Bay if the ship’s whistle were daring member executed the idea \Z has returned from his sojourn in 1s op of one of the stations of the f Service but as yet, we have not had a i report from him. 3CJ and 3DY re- t vacation and installed and oper- , transmitter and receiver at the school’s Exhibit at the Canadian Nat'l 30 msgs were handled from 3ED, ed nu-8DRQ visited 3CJ not long here hooked nu-8BHZ who proved to 1 two-hour rag-chew was held. This work some of the Canadian sta- SEL has been using 20 meters and * * in Moose Jaw, Sask. on that wave " DB has been very busy earning a liv- : time to work DX occasionally. 3BK the air and works an odd nu-5 and handles some traffic. 3CC is in Toronto from Hanover and intends staying there. 8BT rebuilt his receiv: and it’s worse than ever now. 3CT, 3DV and 31x are active but there are no details. 9BJ is stil] of the air as Bill is still at the Island. 9BZ is again active and doing great work on 20, 40 and 52.5. 9BZ hooked the first OZ station this season on 2 9AL has his generator again in commission and has been working hard to make up for lost time. 3F( spends every available moment on 20 meters. Northern Dist.: 3NI, the pioneer station in this district, is going to Montreal where the owner an operator is being moved by his employers. 3HP } had an active month and has also had several visits from other amateurs. Traffic: 9AL 13, 3HP 48, 3EL 5, 3DB 1, 3BK 8DY 10, 3CJ 18, 83ED 30, 3CB 5, 3CS 4, 3DH 1, 3BL 16, 3FC 20. QUEBEC DIVISION Quebec—SCM, Alex Reid, 2BE—Attention ti month is focussed on the coming radio show to held in Montreal. The Division will have a booth as usual where they will have a modern and anci« transmitting set in operation. Messages will also b accepted for transmission. We also hope to incre: QST’s subscription list at the show. 2AX sugge that during the coming winter, we hold a competit open to.all members of the Division. The contest is t see which station can work the greatest number miles in two months. All stations stand an eq chance, it simply means that the fellow with low power will have to stick to the key longer th the fellow with greater power who occasionally wor foreigners. Each one hundred miles will count f one point. The SCM will mail a circular to ea station with full details. 2BR, one of our new st tions, is the star for the month. 2AR is also doi some real fine DX. 2AX is home from the country and has the old crystal working again. 2HV has ke; a weekly sked all summer with Pro. Smitz, C. A. S Canary Islands carrying on many experiments. Als handling traffic. 2HV reports perfect contact except during a thunder storm. 9AM kept a perfect sked with VYG. 2AL and 2BE have worked mar foreigners on 20 meters. Nu-2BEN called on 2BI during the month. Traffic: 2AL 9, 2BR 37, 2BE 4, 2BB 10. PRAIRIE DIVISION SASKATCHEWAN—SCM, W. J. Pickering, 4FC SCM Pickering is on his vacation now so the report was forwarded by Hartt, of x4DGEX. 4CB is the only station reporting. 4FA is now working for the D. o C. Forestry Branch and is stationed north of Princ: Albert. Please report any QSO’s with him to the SCM. MANITOBA—nc4BT handled two. SCM Rutland has resigned and reports go to C. G. M. Russell. See notice. “DO YOU LOVE ME, DASH ?” “rll SAY | DO, DOT /” QST FOR NOVEMBER, 1927 -_ — ——— ~

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’ THE RADIO AMATEUR’S HANDBOOK | has been completely rewritten. Many important additions have been made, descriptions ampli- fied, information brought thor- oughly up to date, and new illustrations added. You need the new one now just as much as you needed the previous edition —maybe more. | eT tn e | The American Radio Relay League, Hartford, Conn. |

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