QST 1920-03: Vol 3 Iss 8

Page 1

(p —~juund (3) So oa d v € Ol

Page 2

Long Wave Reception! bl ; =: ESEGS SSRE¢ TOES SSaE Laogs SSE SEES Py Ie a4 ai " dose TERE aa a Our advertisement in the Jan- uary issue aroused so much interest that we are again bringing the performance of the long wave coil to your attention. The curve on the left shows the work done by an amateur station in Brookline, Mass. The hook-up used is the ordin- ary regenerative or “Tickler”’ arrangement, employing a .001 mfd. variable condenser in both the primary and secondary cir- cuit; grid condenser of .0005 mfd. capacity. The vacuum tube used was the regular Marconi Vacuum Tube--Class I. f these inductances. which will duplicate this result will be postpaid and insured for $6.60 “WViarconi” Vacuum T ubes-Class I and II-$7.00 each ENDEAVOR TO CARRY AT ALL TIMES A COMPLETE STOCK OF HIGH GRADE RADIO EQUIPMENT ATLANTIC RADIO CO., 34 Batterymarch Street Boston, 9, Mass. ALV

Page 3

Two Famous Radisco Specialties RADISCO COILS conceded by several well known Radio Men to be far superior to any similar type of Inductances: Made in seventeen sizes, tapped and plain, Wave length range from 200 to 20,000 meters. Priced from 60c to $4.85. Plentiful supply in stock at all Radisco Agencies.

RADISCO BETTER “B” BATTERY 7 ee is made according to Government specifications in two oe (2) sizes; 3% x2x2¥%" and 64%,x4x3”. A first OSUTNG COMM 3 class 15 cell, 5 group battery. VARIABLE VOLTAGE cous 'RADISCO <a (Pat App. For) is a — feature ~ this aadiery ne | 4 which enables you to provi critical voltage regulation — * for your Vacuum tube by means of a switch con- as * APPARATUS - nection with cells, taps of which have been taken off. I is all Very economical and convenient. If one cell goes bad BETTER ‘8’ BATTERY just test each group of 3 cells and short circuit the ED we naupeenmnens bad one. Price. Small size $1.40. Large size $2.40 RADIO DISTRIBUTING CO. at any agency—or if ordered by mail include postage enn 4 naw J for 2 pounds on small size and 5 pounds on large size.

RADISCO AGENTS carry only apparatus of proven merit. Look for the Radisco trade mark on all parts you buy and be sure of getting efficient apparatus. i Below are listed a few of the reliable firms who carry the RADISCO COILS, Better “B” Batteries, and are our Agents for all other standard apparatus of merit. Communicate your wants to them ALBANY, N. Y. E. L. Long, 21 Magnolia Terrace ATLANTIC CITY, N. J. Independent Radio Supply Co., 118 So. N. J. Ave. BIENVILLE, QUEBEC, CANADA, Canadian Radio Mfg. Co. BOSTON, MASS. Atlantic Radio Co., 34 Batterymarch St. BROOKLYN, N. Y. Kelly & Phillips Electric Co., 312 Flatbush Ave. BRONX, NEW YORK CITY, Amateur Wireless Equipment Co., 1390 Prospect Ave. CHICAGO, ILL. Chicago Radio Laboratories, 1316 Carmen Ave. EUREKA, ILL. Klaus Radio Apparatus HAMPTON, N. H. De Lancey Felch & Co. LOS ANGELES, CALIF., The Wireless Shop, 511 W. Washington St. McKEESPORT, PA. K & L Electric Co. 427 Olive St. NEW CASTLE, PA. Pennsylvania Wireless Mfg. Co., 507 Florence Ave. “SHA” RADIO DISTRIBUTING 3 COMPANY,

NEWARK, N. J. A. H. Corwin & Co. 4 West Park St. NEW ORLEANS, LA. L. A. Rose, 4323 Magnolia St. PITTSBURGH, PA. Radio Electric Co., 4521 Forbes St. PHILADELPHIA, PA., Phila. School of Wireless Tel. Broad & Cherry Sts. PROVIDENCE, R. I. Rhode Island Elec. Equip. Co., 45 Washington St. SPRINGFIELD, MASS., Electric Service Co., 585 Amory St. SCRANTON, PA. Shotton Radio Mfg. Co. P. O. Box 3, Branch at 8 Kingsbury St., Jamestown, N. Y. TORONTO, ONTARIO, CANADA, The Vimy Supply Co., 585 College St. WASHINGTON, D. C. National Radio Supply Co., 1405 U St., N. W. WICHITA, KANSAS, The Cosradio Co., 1725 Fairmount Ave. If none of the above agencies are in your vicinity, communicate with Newark, N. J.

ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 4

WE R EG RET pA Me Price pe “BROWN” oer Sensitive Radio Phones TO TAKE EFFECT APRIL FIRST LATEST IMPROVED ADJUSTABLE STEEL REED, CONE DIAPHRAGM TYPE IGHT WEIGHT, 10 OZ. THE MOST COMFORTABLE AND MOST SENSITIVE PHONE IN THE WORLD BRITISH ADMIRALTY STANDARD 4000 ohms - - Price $18.00, April 1, $20.00 8000 ohms - - Price $20.00, April 1, $22.00 Resistances from 5 ohms to 24,000 ohms, on special order. RAWSON ELECTRICAL INSTRUMENT CO. CAMBRIDGE 39, MASS. ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 5

‘i r ts ©cig455738 WWW” THE OFFICIAL ORGAN OF THE AR.RLL. Y YW MARCH, 1920 VOLUME Ill CONTENTS ‘F. H. Schnell] and Radio Club Organization {R. HG. Mathews 5 Rotten Hours The Old Man 7 Lifting of the Canadian Lid 8 Minimizing QRM The Editor 9 On the Use of Honey-Comb Coils A. L. Groves 10 Telephone Jacks in Amplifiers Benj. B. Skeete 14 A Little Journey J. O. Smith 15 A Dutch Amateur Valve 17 An Open Letter to Mars 18 A New Regenerative Receiver Wm. F. Diehl 19 Editorials 23 The Operating Department 26 Who’s Who in Amateur Wireless 35 The Junior Operator 36 With the Affiliated Clubs 38 Amateur Radio Stations 39 Calls Heard 41 Strays 44 Radio Communications by the Amateurs 46 QST Subscription Contest 51 va aay’ 8 is published gionthly by The American Radio Relay League, Inc., at Hartford, Conn. Kenneth B. Warner (Secretary, A.R.R.L.), Manager and Editor. Subscription price, $1.50 per year in the United States and possessions; Canada, $1.75; Foreign, $2.00. Single Copies, 15 Cents. Entered as gecond- class matter May 29, 1919, at the post — at Hartford, Connecticut, under the Act of March 3, 1879. Ce@pyright, 1920, by The American Radio Relay Loneen, Inc. ' Title registered at United States Patent Office. E AMERICAN RADIO RELAY LEAGUE, Inc. HARTFORD, CONN. “WWM Kk

Page 6

If Eventually, Why Not Now? EFORE the war radio amateurs and experimenters used practically every type mitting condenser manufactured. Many made their own condenser, using the lass plates, tinfoil and so on. t that was before the war—before many amateurs became acquainted with the ficiency of commercial apparatus. After the long-looked-for reopening of r and experimental stations many of the wise operators decided to discard their e condensers and replace them with a GENUINE DUBILIER MICA CON- ER, because of their experience with this condenser while in the Government hose long-distance stations you are hearing—stations that are breaking records equipped with Dubilier Condensers. Practically every U. S. Navy and Army tation on shore or afloat is so equipped. Why? Because of the Reliability, cy, High Efficiency, Ruggedness and Compactness of the Dubilier Condenser u will eventually use a Genuine Dubilier Mica Transmitting Condenser, so why ace your order now? There is a size and capacity for every station. For wave hs of 200 meters we recommend the use of a condenser with a maximum ty of 0.007 microfarad. For special stations using wave lengths of 260 to 425 s, we recommend a condenser with a maximum capacity of 0.01 microfarad. rYPE NO. POWER MAX. VOLTS CAPACITY PRICE 100 \%, K.W. 10,000 0.007 mfd. $17.00 101 le K.W. 14,000 0.007 mfd. 102 1 K.W. 21,000 0.007 mfd. 110 4, K.W. 10,000 0.01 mfd. 111 le K.W. 14,000 0.01 mfd. 112 1 K.W. 21,000 0.01 mfd. The above types are recommended for use with standard makes of transformers. pecial makes of transformers, the following types are recommended: D 103 Special 1 K.W. 25,000 0.007 mfd. $40.00 or D117 Special 1 K.W. 25,000 0.01 mfd. 45.00 For spark-coil sets of l-inch to 4-inch sizes, or up to 75-watt capacity, we amend the following: D 150 75 Watts 8,000 volts 0.0024 mfd. $5.00 Prices on other condensers and other capacities on application Dealers, Jobbers and Distributors—We have something interesting You. Exclusive Agents for Dubilier Condenser Company and others Pacent Electric Company, Inc. tilders and Specialists of Radio, Electricaland Laboratory Equipment 50 NASSAU STREET Bockate’ bate NEW YORK CITY ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS 7

Page 7

lt i a A Magazine Devoied Exclusively to the Radio Amateur Radio Club Organization By F. H. Schnell and R. H. G. Mathews OUTLINE. I. Reasons for local organization. (1) Educational] advantages. (a) Mutual benefits. (b) Increased operating ability. (2) Fraternal advantages. (a) Social benefits. (3) Material advantages. (a) Community operation of station. (b) Community ownership and use of measuring apparatus. Il. Reasons for national organization. ) Traffic handling. ) Co-operation. (a) With Radio Inspectors on interference control. (b) Between different sections of the country. (3) Legislation control. (a) Prevention of unfavorable legislation. (b) Promotion of favorable legislation. III. Methods of organization. ) Local club in small town. ) Local club in large city. (a) Community club. (b) School club (3) Affiliation of club in smal] town. (a) Regular method. (4) Affiliation of club in large city. (a) When club is only one in city. (b) When club is one of many in city. (A) Individual organizations. (B) Executive council under control of national or- ganization. ~we ( (: IV. Practical applications. (1) Instances of actual operation of plans as outlined in foregoing. N these days of supremacy of the labor union, it should not require much argu- ment to convince the most skeptical that there are advantages, to the par- ticipants at least, in organization. In any community, however small, there generally are a number of radio enthusi- asts, the radio bug being of such a nature that he cannot exist alone, but grows in a cluster, so to speak. There are many reasons why these “clusters” should actu- ally organize, elect officers in the usual manner and begin active participation in affairs of the radio game from the broad national standpoint. The educational advantages of such small local organizations are many. The associ- ation of a man with others interested i the same line as himself is bound to give him the benefits of the experience of his associates, and they, in turn, gain the benefit of his knowledge. Then, as the old saying has it, “Two heads are better than one’’, and certainly many heads are far better than one in thrashing out the many perplexing problems which confront the beginner in the radio game. In addition to the advantages of associ- ation with other radio men, the participa- tion in radio club activities will generally give a man considerable operating experi- ence, since most clubs have facilities for practice of the code. Aside from the purely technical side, the social end of radio club participation is worthy of consideration. We are never so much at ease as when in a gathering of men who are interested in the same things we are, and never do we have quite as much enjoyment as in such a meeting. We can look with much satisfaction to the heated argument in which we used to take part, and from the Old Man’s articles in the past, we would judge that our experi-

Page 8

QsT March, 1920 the rule rather than the this work, and of course to participate in such activities, affiliation with the League course, many material is concomitant. formation of local clubs. Aside from the foregoing reasons for do not care to invest in a nation-wide radio organization, there is ts as wavemeters, hot wire the primary purpose of such an association nd yet these instruments in the prevention of legislation unfair and necessary before intelligent unfavorable to the interests of amateur ration can be accomplished. radio. We have witnessed in the not of these things, to be used distant past several efforts to practically has solved the problem in’ eliminate the radio amateur. These efforts Club ownership of a good were well thought out and planned, and s also solved the problems would have succeeded, had it not been for irs who do not have the’ the influence brought to bear by the organ- h an installation at their ized amateurs of this country. Similar respect, of course, things efforts are now in preparation, and it is rranged incumbent upon us to ver the increase the effective- ership ness of our own de- “atus are THIS ARTICLE fenses so that future is not the kind which can be attempts will not be mation illustrated. Because it is solid more successful than zations, type, however, do not pass it have those in the past. desir- by. It is important, and fills The officers of the e affili- a long-felt want for informa- League are awake to e repre- tion on club organization and the dangers of this zation. control. unfavorable legislation, States The A.R.R.L. Secretary will | ut slone they can do ne na- - nothing. In order to = be glad to hear from clubs in- pete lich the desired — caas terested in becoming affiliated pee “og oe 1irements ein Lenmee-~iidites. result they must have freedom we s the backing, and the il in- : ACTIVE backing, of presents every radio amateur in in the affairs of amateur the country. eur radio alone. That one As a corollary to the prevention of un- of course, The American favorable legislation, there, of course, is rue. the promotion and preparation of favor- res of a national organiza- able regulation. This also requires the the A.R.R.L., are very active participation of every radio man in indling nation-wide traffic, the country in order to be successful. h traffic must be vested in : of such size, scope and LOCAL CLUBS IN SMALL TOWNS be able to really maintain coh- In forming a local club of any size in a ticability of such a scheme town of medium size, a certain regular e present efficient operation procedure may be followed. The first re- L. traffic routes. In order quirement for such action is one live radio 1 these activities it is neces- amateur, with at least one friend (strange vidual local clubs to attach as it may seem, radio men occasionally the A. R. R. L. have friends). This man can start a club traffic control, but allied on his own initiative by merely getting a sely, there is the problem number of his radio acquaintances to control and the enforce- attend a get-together meeting to plan the In order to prevent the organization. It is advisable in this respect more strict radio laws, which to get the aid of the District Superintend- innecessary, the existing regu- ent of the League for his particular terri- t be enforced to the letter, and tory, who can give him detailed advice as the duty of every good to the proper procedure in any particular who has the welfare of ama- instance. The usual officers may be elect- t heart, to assist in the en- ed and a brief constitution drawn up cover- ' these laws by the duly ing the primary purposes of the club. It representatives of the Depart- is not necessary to prepare any elaborate erce. This can best be done programs for meetings, though this can be e organized efforts of our nation- done if desired. Getting together and , and in fact is being done at talking over the radio happenings of the time. It should be the duty week will be found interesting. Com- rganized local club to assist in (Continued on page 21)

Page 9

a J a at March, 1920 QsT Rotten Hours By The Old Man w yarn which will find an answering ‘Aye!’ , T.O.M.’s with us again, and the rest seems to have done him good, for this is a deep from the heart of every y a good laugh in this but no doubt will continue to observe—Rotten Hours!—Editor. relay man. You'll get many to end?- Here I have sat up until gawdnose what hour in the morn- ing trying to clear my traffic, have grown dark circles under my eyes, have aroused the suspicion of our Chief of Police that I have a hidden stock Ss: Mister, where is this thing going of booze in my cellar, and I am just exactly a_ little worse off than when I started. For a fact, I began this week with six messages on my pin and this Saturday night I have nine. And one night I went to bed at one thirty, another at two fifteen, still another at three ten and on the others anywhere between twelve thirty and one thirty. At this date I have all the symptoms of having joined the wood alcohol brigade, when in reality it is two weeks come Tuesday since that last near- beer went the way of all things earthy. It’s fierce. I think it was Wednesday I got peeved and swore I would sit the gang out, by heck. I sent the little wife to bed, loaded all the corn cobs and put them in a row, called in the cat for reasons best known to myself, and went at it. I think it must have been along toward twelve that I got rid of two to a certain gent whose spark comes into my place like a machine gun gone amuck, and around one when I man- aged to push one more on a duck over East who managed to read me in a lull in the din. From then on it was rough going what with the roaring of 8JQ, the howling of 8CB, the booming of 9ZN, the hoarse fluttering of 8CC and the bawling of 8ER. Seems like the loud ones are the late sitters. After one thirty in the morning these strong-voiced ones are about all that are going and between them they certainly do set up a clatter. But Istuck. I CQed, and yelled myself black in the face, got cross, called ten times and signed in eleven, got answers which could not be read through the racket, got mad, spat on the cat again for luck, hollered some more and got all heated up and groggy, what with the tobacco smoke and all. But it was not to be. At three ten my stomach went back on me. When a man’s stomach begins to go back on him he reviews his past life and regards his future prospects from an ultra-conservative angle. He gets where he doesn’t much care whether the darned old message ever gets there or not, nor whether the other fellow sits up later than he does or not. That’s where I got at three ten A.M., and thinking kitty and I had both had about enough, and possibly that kitty might be taken sick during the night, I let her into the cellar, pushed most of the burned matches and the ashes under the rug where they wouldn’t show in the morning, and tired, discouraged and squiffy amidships, and more than half smoked to death, I hit the hay. Next morning the little wife, who had shot a couple of narrow ones at me, asked pointedly what time I had gone to bed, to which I replied lightly, “Oh, a little after twelve”.... “You look as though you had a sickness coming on.” That settled me. She could not have hit me harder, and she knew it. I had been arguing with myself that I felt and looked like a poisoned pup, and now knew it. But it would never do to weaken, so after toying with the break- fast for a while I beat it to the office, where I arrived on time and soon became lost in the snarl of business. Several times during the day I harked back to amateur radio and the night’s debauch, but as I began to brace up it didn’t seem such a nightmare. By five o’clock I was interest- ed again, and after supper all the fire re- turned and back at the old set I went, just as nutty as ever. Now, what I want to know is just this:— How do those other night-owls work it? Don’t their stomachs ever go back on them? They were still going in like mad when I bit the dust. How much later do they sit up? Do they never feel like a boiled owl when they get around in the morning? After a hearty mid-day dinner afid a pipe, don’t they feel like falling asleep at the switch, just for one sweet hour or so? Wouldn’t they also give freely ten years off their lives for one brief hour of delicious snooze? Can they read the paper after supper with- out falling off the chair? I’m blamed if I can. My eyes get swimmy in just five minutes, no matter how exciting the story. In the interests of science will not some of these young gentlemen write to QST and tell how they sit up all night and feel so grand the next day, and keep it up indefinitely? Take Mrs. 8ER for example. She interests me. Do she and Mr. 8ER

Page 10

Do they never sleep at a day and a night shift, the victuals while he operate while he feeds lo they work it? And ndo, 8CC up there in es he turn in at seven and ock at eleven and then s nightly programme of ‘in to make up for lost late bird for fair. No ontracted a swing to his rotten hours he does. nee before the War that cycle flutterer, old 2AGJ, after supper, sleep on a midnight and then get to pound the ether with four in the morning. That’s ft the pin, all right, but some time, as I regard it. ngs I hope to avoid, until the father of a respectable suestion, “WHY DO I DO er such a question truth- ise doubts to arise in the friends as to my sanity. It never do to say that I had of messages. They might y I had got off. I would iy four. What, sit up all <« my head off and only get ves! No, that wouldn’t do. Aleck might suggest that vere very, very important As two of the four were BY RADIO”, and the other MERRY XMAS AND HAPPY FROM ALL”, that would not the greetings could wait ly without anybody losing it and the Xmas business waited more than a month. ’s a case of SOL if any one stay up so late. I usually ntroduce a diverting element ‘sation when I think I smell a r, tell me. What is all this way? The whole blooming s fairly busting open at every essages every night. I never rid be so many greetings and ngs. The ether is so choked business that if many more vill be case of insect powder, ps or something. I seem to insulation already on my erever Igo. We cannot go on ns to two hundred meters in- There will come a time when | list to port, or settle down by - founder altogether. We sure to lose old 200 altogether. ere will come a down-slant in when the saturation point is The number of messages which QST

March, 1920

get through will be so small by comparison to the number of stations straining their

gullets trying to send them, that the curve will approach zero. Then what? Answer me that, Oh ye wise ones. Forget

the bulb business a moment and tell, Oh tell us, how to get more than four messages off a pin in seven and three-tenths man- hours.

LIFTING OF THE CANADIAN LID E have received the following from the Canadian Deputy Minister of the Naval Service at Ottawa:

Department of the Naval Service,

Ottawa. 30th December, 1919. Sir :— a I have the honour to advise that the ] Minister of the Naval Service has been

pleased to authorize all amateurs on the Great Lakes and River St. Lawrence from Port Arthur, Ont. to Quebec, P. Q. to use a transmitting wave-length of 200 meters r until the re-opening of navigation, approxi- . mately the 15th April 1920. The Department is anxious to accord to amateur stations every possible latitude compatible with the proper protection of Naval and Commercial services against interference, and the authorization of the use of 200 meters this winter is in the nature of an experiment. Should no interference result the De- partment is prepared to consider a per- manent amendment to the regulations re- garding wave-lengths, and it accordingly behooves every amateur to see that his transmitting apparatus is sharply tuned and its decrement reduced to a minimum. Your attention is particularly called to Radio telegraphy regulation No. 25, read- ing as follows: “*A distinctive call signa] wil] be allotted to each station commencing with a figure eg. 3A A etc. which signal must be sent not less than three times at the termina- tion of every transmission.” I am, Sir, Your obedient Servant, G. G. Desbarats, Deputy Minister.

This is the first step forward, and we believe a permanent amendment in Canadian wavelength regulations will soon

follow. Canadian operators are requested to see an Editorial in this issue on this subject.

Page 11

ee ee ne eee ) March, 1920 QSsT Minimizing QRM By the Editor HE circuit described below is one developed by the British navy dur- ing the war, and possesses very great selectivity. It was used ex- tensively during the transmission of broadcasts which were protected by inter- ference signals sent simultaneously on a wave so close as to make it impossible for the enemy, without this apparatus, to read the signals. Towards the end of the war every British and American vessel had this circuit, which was known as “the red plug” for the reason that the auxilliary apparatus comprising the QRM minimizer was con- nected in by inserting a red plug in a jack. RECE/VING SET =o a C) O # i? ¢ ~ — i: - Cae This type of circuit is known as an acceptor-rejector, or wave-trap, and con- sists essentially of a condenser and variable inductance in parallel across the main re- ceiving apparatus as shown in Figure 1. Such a circuit, as is well known in the- oretical electrical engineering, possesses infinite impedance to oscillations of its own natural frequency. When values of L and C are so chosen that a large C and a very small L are used, the impedance to resonant frequencies remains as before but to all other frequencies the high value of capacity and low inductance provide almost a direct short-circuit. The circuit employed on American vessels is shown in Figure 2. This apparatus had a wave length range of approximately 1500 to 5000 meters. The constants for this range were as follows: L, — 10,000 microhenries L, — .4 to .5 369 L, — -.09 to .5 L, — 1200 a L, — 6600 “ C, — 0.001 microfarads Cc, — 1.600 Cc, — 0.016 = Cc, — 0.016 a The inductances L, and L, with the capacity C, from the wave-trap, shunted The condenser must be of the utmost efficiency, across the main tuning circuit C,l,. with minimum resistance, leakage, and phase displacement. Ordinary “air’”’ con- densers are unsuitable because of com- paratively high losses thru the insulation material supporting the plates, etc., but. mica condensers are very satisfactory. The inductance must be of the lowest possible resistance, and minutely variable. Thus L, may be used for rough adjusi- ments and on the longer waves, while L, consists of a single turn of brass or copper tubing or 1% inch ribbon, 10 inches in diameter, with a roller contact very ac- curately adjustable by a rotating knob. To operate, the circuit should first be tuned with the rejector cut out by opening the switch as shown; the rejector then cut in and adjusted until the signals reappear. When this condition obtains, the rejector elements have.the same period as the de- sired wave, and the action is as follows: All incoming oscillations not in resonance with the rejector are shorted thru the small inductance of the latter direct to earth, instead of passing thru the higher impedance of the inductance L,. However, incoming oscillations of the same fre- quency as the rejector (the desired fre- quency), encounter very high impedance (theoretically infinite) in that circuit and so pass thru L, and induce an EMF in ly. FIG. 2 ) Ls _ i C4 = Ls A most amazing selectivity when work- ing among fairly sharp-tuned stations is claimed for this system. Signals differing from those desired by one percent are said to be entirely eliminated, and without re-

Page 12

th of the desired signals. The f considerable static is al the best of our knowledge tl now in regular use in al n. Our need for a QRM mit t distressing and we feel that offers possibilities. We ther« it in the hope that our seri ll take it up and develop its } r 200 meter work. It offer promise, yet we are not y hat it will be a success, a n: it does not eliminate t] nent on the desired wave ts the non-resonant fre- jammed by a strong sig- na t not identical frequency, roblem if the jammer is shal ise of broad-tuned ama- teur that component of the ener ned frequency will still be | we therefore question whe ve of much value in work- it nearby spark coil sets. For rk, however, it should sure- ly rticularly in one certain pr of the good long-distance oper late and dispatch their traf evening’s hubbub has died lov eless there may often be ’ on at the same time and their gnals jam each other thru act llations in these days of hig! There is generally an pp! ference in tunes in these r, and the rejector should nate this very troublesome QSsT March, 1920 This circuit is employed with a tuner using a series antenna capacity so as to accentuate the difference between the low C and high L path thru the tuner and the high C low L path thru the rejector. As to the constants for amateur work, LC in micro units for the lowest wave we will want is seen to be .01, and remembering that the inductance should be as small as possible the value of C for optimum results would seem to be about .1 mfd. with L variable from .1 mhy. to .4 mhy. This is a pretty large condenser and will be ex- pensive if made of mica. We understand that the U. S. Navy has used ordinary paper condensers for this purpose, adjust- able by S P.S.T. switches, and if this will work out it will simplify matters greatly. However, it seems fairly logical that good results should be obtainable with a con- denser as small as .01 mfd., with an in- ductance variable from 1 mhy. to 4 mhys. Rearing in mind that the latter must be of low resistance and delicately variable, it could consist of a single turn of copper tubing or wide ribbon, several inches in diameter, and with a sliding or roller con- tact; or a variometer of two turns of bus- bar copper, with small clearance, might be devised to most satisfactorily answer the purpose. We hope the scientists among us will see what can be accomplished with this device in amateur work. Its possibilities justify hard effort to adapt it to our uses. The Editor will be pleased to receive com- munications on the subject. On the Use of Honey-Comb Coils By A. Groves oves, an ardent A. R.R.L. enthusiast, is unfortunately so located that he can do no trans and so for many years has been obliged to confine his activities to efficient reception, in v work be has made a name for himself in amateur circles. He will be remembered by QST rea se the author of some excellent articles before the war on long-wave receiving apparatus, ha lays when —— loading inductances were the fashion. e has more than kept pace wit w developments in long wave reception, and in this article gives us what we can accept as e information on the use of the honeycomb coils, particularly on the correct sizes to ems ibject on which we have long needed accurate data.—Editor. is been written about the and demerits of different tus for the most efficient n; still I would like to my present opinion re- of the newer receiving the hope it may be of benefit ir readers. were closed up account of lt a receiving set for ranges of 8,000 meters of the very best des my several] years of experi- er var days had shown to be the best the word came to open up I strung the wires and tuned up, and the set met with my every expectation and more. I had several different bulbs and tubes, but only two that were really worth while, one an Audiotron and one a DeForest round bulb I had had “repaired” by the Scientific Laboratories. Both these were about the same sensitivity, the Audio- tron being probably slightly the better in actual signal strength but easier to “go dead” than the repaired round bulb. My first addition in the new line of apparatus was the DeForest amateur VT. This bulb showed a slight increase in signal — Ton meee a

Page 13

i . ale a a March, 1920 strength over any of the others, consumed only about one-half the current and never goes dead. This, together with the fact that it does not require fine adjustments of the A and B Battery, caused me to like it better than anything I have yet seen. Whether they are all alike or not, as claimed by the manufacturers, I do not know; but this one of mine operates on three 22% volt batteries for plate poten- tial and two volts filament current for maximum strength signals. That is, 2 to 3% volts filament current operate it at the same efficiency. Below 2 volts and over 3% volts it shows a decrease in sensitivity. It also operates on one 22% volt battery, but not so well. After experimenting with different cur- rent values in both plate and filament I decided to take the filament rheostat out and operate it on two dry cells (3 volts when new), which I am now doing; or, rather, am using 4 dry cells connected in series-paralle] to prolong the life of the batteries, but this has no effect on the sensitivity of the bulb. The genera] impression seems to be the VT is not as good as the old style bulbs, but if one wants a better operating bulb than this one, he is a hard nut to please, is all I have to say. The little boys on 200 or the big ones on the longest waves are all the same to it, which cannot be said of the old style bulbs, as some would work extra well on short waves and poorly on long waves, while others would work well on long waves and not so well on short waves. Even two filaments in the same bulb would show these undesirable features to a marked extent quite often. My next addition was the purchase of a few Honeycomb Coils and a mounting. At first I did not like the operation of these coils, as signals could not be tuned in quite as loud as with my old set. Still I kept plugging at them until one night while listening to POZ I pulled the right “string” and POZ jumped up at me like he had suddenly moved a thousand or so miles nearer. I hung the phones up and went in the other room and still he could be heard pounding away, so I switched over to the old set to see what was doing there and, work over him all I could, I could only get him with the usual strength, which was about three feet from phones. I then commenced work on the other stations and soon had several of them amplified to an extent impossible with any- thing else I have ever seen. I must admit it takes time, study and patience to get these coils working best over the entire range of waves, and even for a few stations, but once the problem is worked out I feel that no one will be willing to go back to the old style couplers or any other form of tuners that were considered QsT “the best” in pre-war days. There seems to be a misunderstanding among most amateurs as to the wave length ranges of the various coils, and they do not seem to understand why so many coils are necessary when one coil is advertised to cover an extremely wide range of wavelengths. In this connection it may be well to point out that although the coils advertised will respond to approx- imately the wavelength range as adver- tised (in the secondary circuit only), the greatest efficiency cannot be obtained from any vacuum tube where large values of capacity are shunted across the secondary coil. Hence, to get the greatest signal strength from a station it is absolutely necessary to use as little capacity of the secondary condenser as possible. For in- stance, suppose we wish to tune to NAA spark on 2500 meters; we can use coil L-300 as secondary with about 60 degrees of a .001 Murdock Condenser in shunt, or we can use coil L-500 with about 15 V ss. roinco. -i aa ay. —. 1 ~e omg 2 | Set Sel & 8 ETEIE el S | La =" Afafafefalels Bs Fig. 1 degrees of the same condenser in shunt, or we can use coil L-50 with about 15 degrees of the same condenser in shunt, or we can use coil L-600 with about 6 or 7 degrees of the same in shunt. Now coil L-600 will give the loudest signals from NAA owing to the small capacity used in shunt with it and the other coils will give a corresponding decrease in signal strength owing to the increased capacity necessary. As maximum strength signals are not always desirable, where interference pre- vails, greater selectivity can be obtained by using the smaller coils and higher capacity of the condenser, but for ordinary work, tuning will be much easier and sig- nal strength greater if the largest possible coil and the smallest possible capacity of condenser is used in the secondary circuit The impression prevails that the L-25 coils are the proper size for 200 meter work and many an amateur has been sadly

Page 14

QSsT his “short wave ese coils shows L-50 ise for the secondary ze for the plate or 0 as the secondary, irs will come in with yut 8 to 15 degrees meter stations will lenser about 38 to L-75 with condenser better signals from le coil L-50 is cor- espond to 400 meters ; at or near zero, so ed for all waves from to 550 meters. Coil ised as the plate coil. r wave, nothing could L-150 coil using the to 5 or 6 degrees and L-100 as the plate r somewhat greater may be used as the increase in the con- signal strength will respond to about 800 lary circuit with the and as this is the Compass Stations use t, 1920, it will be well March, 1920 for the amateur to have a set of coils for this wave. Coil L-100 will be correct for the plate. This set of coils will also effectively cover the naval calling tune “MVy’’. Coils L-250 and L-300 will respond to a minimum wave of about 1000 and 1200 meters respectively with the condenser at or near zero. Coil L-300 will respond to the stations using about 1500 meters with the condenser between 15 and 20 degrees, and as men- tioned before, will respond to NAA’s wave with condenser at about 60 degrees. Coil L-100 may still be used for the plate coil on any of the waves from 800 to 1500 meters. Coil L-400 gives the greatest signal strength from the 1500 meter stations as the condenser ranges from zero to 5 degrees to tune them in. This coil may also be used to cover waves of 2400 meters with about 20 to 25 degrees of condenser in shunt, where selectivity is desired But Coil L-600 will give greatest strength signals from the 2400 meter stations as they will then tune in with condenser at near zero capacity. Coil L-500 may also be used for the 2400 meter wave with condenser at about 12 to 14 degrees. Coil L-100 or L-150 may be used for the plate coil. Coil L-750 will respond to a wave of

Page 15

March, 1920 about 3000 meters with condenser at zero, to the 4000 meter calling wave with con- denser about 16, and to 4,800 meters with condenser about 20, so this coil can be used nicely for all waves between 3,000 and 4,800 meters. L-200 or L-250 may be used as the plate coil for these ranges of waves. Coil L-1000 will respond to 4,800 meters with condenser about zero and to 7,000 meters with condenser about 32 to 34 degrees, so this coil will respond to a great number of stations, including the British “BZ—” stations, NPG, NAW, NAU, WU, NWO, NPZ, NAR, NBA and many others of similar wave lengths. Now this coil ean be used up to the wave of POZ on about 12,600 meters by using the conden- ser at about 115 degrees, but except for extreme selectivity I do not advise any such capacities being used. Coil L-250 or L-300 may be used for the above range of waves, 4,800 to 7,000 meters, in the plate circuit. Coil L-1250 will re- QsT 13 station in the condenser has to be at near 85 degrees, using L-1500 as the secondary. However, by using two L-1500 coils in series (one as the secondary and another as a loading coil) somewhat better results can be obtained on waves of 12,600 meters and over, and to tune in NSS with the two coils requires the condenser at about 40 degrees, but as these coils are not de- signed to be used as loading coils no big advantage is gained by this arrangement— nothing like what would be gained if we had one single eoil of near like inductive value. Coil L-300, L-400 or L-500 may be used for the plate coil over the range of waves covered by the L-1500 coil. No mention has been made here of the primary coil, as these will vary with every aerial, but knowing the secondary coil to use for any given wave or station is the most essential part, as it is then com- paratively easy to find the proper coil for primary, and except for the short waves (200 to 1000 meters) spond to a minimum wave of about 5000 meters with the con- denser near zero, but this coil is not at all necessary for either secondary or plate type. TUBE CONSTANTS The deForest tube used by Mr. Groves is the Marconi-Moorhead plate and secondary VT Class I]—the high vacuum j In this connection data on almost anything can be used for the plate coil, provided the coupling between the is properly adjusted. As to the efficiency of these coils and the purposes. Coil L-1500 is called upon to cover a much wider range than any other coil, entirely too much range, and it would be much better if there were another coil, say one L-2500 to cover the waves from about 12,000 meters up. However, we haven’t got it so have to make the best of the L-1500. Seeing that coil L-1000 will respond efficiently to 7,000 comparative tests of modern tubes made by the Bureau of Standards will be interesting. The values given below (averages for a large number of tubes) indicate the relative merit of the tubes as detectors and as amplifiers com- pared with an arbitrarily chosen standard tube in a test set de- signed to operate the tubes under conditions most favorable to the VT-1. Type Detector Amplifier VT-1 56.5 26.5 VT-3 54.0 25.0 VT-11 55.0 22.0 VT-13 50.0 22.0 VT-21 53.0 23.0 Moorhead 54.0 22.0 VT, I will leave it to your own judgment by quoting a few stations heard on an aerial composed of four No 16 wires 30 feet high, with them and ai single VT. POZ and LCM are often easily read 25 to 30 feet from phones, while NBA, about 2,000 miles away, is often so loud it is really disagree- able to keep the phones on. IDO and NPM, which are over meters, the lowest wave to which coil 4,500 miles distant, L-1500 is called to re- spond is this tune. This it will do with the condenser about 8 or 10 degrees, while it will respond to POZ on about 12,600 meters with the condenser at about 46 or 48 degrees. This should be the extreme range of this coil, 7000 to 12,600 meters, but fortunately there are very few stations that use waves longer than POZ and most of these are in the U. S. so we can get along nicely with it, although maximum signal strength cannot be had on the long- est wave. NSS uses the longest wave of any station at present, which is officially said to be 16,900 meters and to tune this come in good and readable all day long, except in cases of heavy static, and they are often loud enough to be copied several feet from the phones. It is useless to attempt to give a further list of arc stations heard as I hear about all of them worth while, and the strength of those mentioned above will suffice to give you an idea as to how the others come through, so will take up the medium wave spark stations, where my greatest surprise came. On the wave of 1500 meters, stations down to and including NAU, a (Concluded on page 20)

Page 16

March, 1920 QSsT lelephone Jacks in Amplifiers By Benj. B. Skeete H QST, who are identi- we will see that when the phone plug is est in wireless, will removed from the jack, the amplifier trans- the method here former is connected in series in the plate necting the phones circuit. On inserting the plug, the outer f the detector or arms of the jack J J’ are forced away from amplif erely inserting a the inner arms K K’, cutting out the tele} proper jack. This amplifying transformer and connecting the will illy to those who phones into the circuit by the contacts are r the construction of made by the arms J J’ with the plug terminals T T’. r m" 4ieltleleletelelaihe I egenerative two-stage- The plugs and jacks used above are of amplif plete except that the the “two circuit” type. A simple “open conne plate circuit are not circuit” jack is used at 3 in Figure 1 with comple lettered in groups, 1, its terminals connected to X and Y. 2 and manner of connecting Normally open, the ciregit is completed to th ( xplained. Aand A” thru the phones when the plug is inserted. are | plate, B and B” are Jacks and plugs can be secured from QST contir path to the positive advertisers. of tl nd C, D, C” and D” , are t) f the primary windings A~ 2 of the ransformers. c = sto O) With the exercise of a little ingenuity Os ne the builder can make use of a more com- An oe © 4 plex jack in a similar manner but employ- ing an extra pair of contacts in the fila- ment circuits in such a manner that in- sertion of the plug in any given jack will extinguish the filament in the unused stages. HEARD AT SEA by operator of S. S. “Curlew” while 500 Figu the jacks and plug, with miles east of New York, between Feb. 3d the fi inals (A’, BY, C’, and and 7th: 1AE, 1AW, 1CM, 1EA, 1FN, D’) | rly to the terminals in 1GP, 1JG, 1RN, 1UE, 1XE, 2AN. 2AR, Figur } illustrates the method o2BB, 2BN, 2CB, 2DA, 2IE, 21R, 2JE, 2JU, of « the jack to the appar- 2NB, 2BV, 2NM, 2QV, 2QR, 2QM, 2SH. atus 1 nd because of the similar 27J, 27S, 3AN, 4AT, 8AU, 8CX, 8DA, letter yn will be avoided. 8EN, 8ER, 8NO, 8F0, 8FP, 8US, 8JQ, If 1 e the circuit in Figure 3 gUJ, 9BP, 9HW, 9QW, 9ZL.

Page 17

av —: - — } March, 1920 QSsST 15 A Little Journey By J. O. Smith, Traffic Manager, American Radio Relay League Radio from the Control of Naval Autocracy,” I embarked upon a little journey that took me through the many cities, real and alleged, of twenty States, as follows: New Jersey, Penn- sylvannia, Delaware, Maryland, Virginia, North Carolina, South Carolina, Georgia, Florida, Alabama, Mississippi, Texas, Okla- homa, Arkansas, Missouri, [llinois, Indiana, Ohio, and New York. (V’ll bet that nine out of ten people who read this article will count ’em up to see if they total twenty). j During the course of my wanderings, I had the good fortune to be able to meet personally many well-known radio ama- teurs, and the misfortune to look over many amateur stations, and while I have only pleasant memories of the personal element in my visits I can truthfully say that it will take me a long time to recover from the shock I received when I looked over the equipment of some of the amateur radio stations of the South and Southwest. How some of those stations can possibly work over long distances, as they do, or, in fact, how they work aft all, is beyond me. Many of these stations were well set up in many respects, but poorly con- structed in some one or two important details. Im one case, I had the pleasure of listening in on a home-made regener- ative receiving set, that really worked as well as a Paragon or a Grebe, but when I got into the details of the transmitting side of the outfit, I saw something that made me sad. The ground system for this 1 K.W. transmitter consisted of a No. 14 wire soldered to a washboiler, six inches under ground. The argument was that in the case of a telegraph line the ground consisted of only a single pipe driven into the ground, consequently, as a washboiler offered so much more surface, it certainly must be adequate. The owner admitted that he heard all sorts of long-distance stuff, but could never “raise” anybody. When I finally felt able to talk. without hurting the young gentleman’s feelings, I laid out a comprehensive ground system consisting of a 1 inch copper strip to a distributing centre, ten pipes, 2 inches in diameter and 8 feet long driven into the ground about 15 feet apart, 1,000 square feet of chicken netting under the antenna and the washboiler. After the noble effort that washboiler had made to hold up the ground end of the outfit, I didn’t have the heart to leave it out of the scheme. N the 28th day of October, in the “Year of Liberation of Amateur One of the first stations I heard after returning to Rockville Centre was this self-same station, and it is over 500 miles away. The owner has since written me that he is amazed at the difference in his transmitting range. He says he never thought the ground end was so important. The owner of another 1 K.W. station that I visited pointed with pride to his hot-wire ammeter, which registered about 8 amperes. That had me puzzled until I looked at the oscillation transformer and found that the primary and secondary were jammed tight together, the owner explain- ing that he had set them tight together, of course, because the hot-wire ammeter showed the highest reading with them in that position. I guess he must have detected a look of sadness in my face, for he asked me, after a few minutes if I had lost any relatives lately, or if I had other troubles of any kind. I replied that I felt sad only because of all the rotten radio stuff I had run across. After an argument lasting two hours he finally agreed to separate the coils by about six inches and try it, but he certain- ly was impatient and sceptical about it. However, he is now cured. The fellow who recently wrote me that a friend had told him that his station did not carry because his oscillation trans- former was full of ohms, and who wanted to know how to get them out, had nothing on the fellow whom I ran across who attempted to reduce the wave length of his station by cutting out one of his six leads to the antenna. When we found that the wave length of the station was about 350 meters and I had told him he was likely to interfere with commercial traffic, his face immediately brightened and he started to eliminate one of the six leads when he asked me how much differ- ence [I thought it would make in the wave length and I said about 1 2/3 meters, he looked pained. I could see he felt sorry for me. The next day, however he trans- formed the L antenna into a T, and to his surprise, the station still works well and on a wave length within reason. In another town I ran across one of those fast-sending birds. A vibroplex had nothing on him. The only difference was that it might be possible to read a vibroplex, but I don’t know of anybody outside of a clairvoyant that could ever determine what this fellow sent. He ripped out a long discourse to another station nearby about my being there and invited the owner of the station to come

Page 18

After considerable on came back made V’s and wound up by signals are strong and i later.”” I told him not the invitation. I tried matter of slow steady but I don’t know advice or not. But be a good guesser to west there is a station ble work. This partic- heard on both coasts. ns, however, that the tation misses the first [t had occurred so often by other operators iys happened at the ges. When I visited l why. from transmitting to operation was to throw switch. Then it was or close seven other the filament current suld be heard. Every ; necessary that oper- man in seven states. a simple, effiicient th him that will cut out and went my way. I itcome. He seemed to sure in playing with he did in getting a a distant station. If s, and happens to need for earthly sins, I am the Boss of the Lower him in a room with f switches, handles, ers, meters, etc., but the whole works by lass partition. e I visited I discovered f that QRM we are all The operator of this fflicted with “keyitis”’. was suffering from ment which had affected sed hallucinations. He it unless he transmitted terrible fate would over- nations, arguments, etc., and had no effect. As ut his left hand, said ind kept right on trans- tor I listened to was s”. This fellow had a distant stations. As tant stations would ride of a wave this fellow em. To the best of my elief he called stations in rict in the United States When he had finished QSsT calling a station so distant as to make the effort appear ridiculous the operator of the station where I was visiting broke in and called 10—XYZ, 10—XYZ, 10—XYZ, ete. After a minute the bird afflicted with “callitis” came back with “Say bo, QRA 10—X YZ, I can’t find it on my list?” It is true however, that while I ran across many things on my trip that made me sad, I also ran across many interesting and pleasant things, and one of the most interesting was my visit with Mr. John M. Clayton, 5ZL, Little Rock, Ark. During the evening in the latter part of November that I was there, it was a real pleasure to listen and witness some re- markable amateur relay work. Mr. Clay- ton took a message for the Coast direct from 9ZN, at Chicago, and passed it on to Station LF, operated by Mr. Louis Falconi at Roswell New Mexico. The air line distance between Chicago and Little Rock is approximately 550 miles. Little Rock to Roswell is 800 miles. At the time this message was given to Mr. Falconi, he was attempting to get in touch with 6EA, at Los Angeles. He was hearing 6EA very well, but couldn’t raise him. No doubt that gap has been closed by now, making a quick relay from the Middle West to the Pacific Coast a_ certainty. As more stations begin operation from time to time, making the jumps shorter, a reliable relay route to the Coast particularly by means of Trunk Line C, will be assured. It is a fact that the middle section of the country is far more favorable territory for amateur radio work than the east or west. Here in the east New England is shut off from New York as by a barrier. It is true that it is possible to work across the barrier at times, but the work is always difficult and uncertain owing to fading, etc. The air line distance between Hartford and Rockville Centre is 75 miles, and yet signals fade badly in both ways, and the two points, so far as radio is concerned, might just as well be a thousand miles apart. In fact, LAW can work stations in the eighth and ninth districts much easier than second district stations. It frequently happens that an eighth district station will tell 1AW that signals are strong and have no trouble at all in working the station, and at the same time the signals of 1AW will be very weak, sometimes inaudable, at Rockville Centre. These conditions are true between many sections in the east and radio communica- tion is made very difficult because of them, as compared to the good parts of the Middle West. However, it is true that there are localities in the west that offer the same problems as in the case of Hartford and New York, but as a rule these areas of the (Continued on page 18) March, 1920 ii

Page 19

se be De eee en RET ous Davai Si AD a tats eas Sli a March, 1920 QSsST 17 A Dutch Amateur Valve [tees or the kindness of Mr. G. Roes, of Dordrecht, Holland, QST obtained from Mr. C. W. Ridderhof, agent for the Philips Lamp Works, at IJsselstein, Holland, a specimen of the Philips Receiving Lamp, which is the first Dutch-made amateur tube. As will be noted in the photograph, the Philips Lamp is a tubular valve, construct- ed internally in a fashion similar to the old round DeForest audion but having two candelabra base connec- tions, one at either end, one for filament current and the other for plate and grid connections. The ele- ments are smaller than in the ordin- ary tube, the plates being %-inch square. Two plates and two grids are used, with a single V-shaped tungsten filament in the center. QST is indebted to Mr. Mathews and Mr. Hassel for the characteristic curves secured in testing this tube at 9ZN. Altho rated by the maker at 0.25 ampere norma] filament current, our specimen obtained normal brill- iancy on 0.125 ampere, at a potential of 4 volts. This is interesting, as the tube would work quite satis- factorily on dry cells with this low current consumption. The character- istic curves are what might be ex- pected. The normal plate voltage is 24, and the specimen tested ionized at slightly under 30 volts, and was found to function best as a detector with 19 volts, at which value the plate current with free grid was approximately 400 microamperes. The vacuum is quite low, and as was to be expected, the tube proved a very fair detector, tho unstable in its action and not as sensitive as our American tubes, par- ticularly the AudioTron. No data on its average life is available, but it is believed this con not be very great because of the brilliancy of the filament and the low vacuum. The one tested could not be made to oscillate under any conditions, nor would it function as a radiofrequency amplifier. Mr. Ridderhof reports that on his 150-foot aerial the daylight signals of NWW, NSS, and NFF can be read on one tube. The use of the candelabra bases for the terminals is most convenient. Unfortunately both threads are right- hand. If one were right-hand and the other left-hand, a mounting con- sisting of the respective sockets at- tached to spring metal arms would make possible the insertion of a tube by simply rotating it, turn-buckle fashion. As it is, however, it offers a suggestion to our American manu- facturers of tubular valves. A_Dutcd BMareve Pee > ~ an i + i si a = Pre se Rely ae e Se SeeeeeD: rT Sal ane 125, dmp| | an oS “a (9 valts| 7 | cs an" Tel | Le HH +++ TR > OE ee j 2 | Be! . 3s ott j 3 iv ae 4 a , Se

Page 20

QsT March, 1920 An Open Letter to Mars By ? ? of the funniest contributions which ever drifted into the QST Factory, and we've s. This is supposed to be anonymous, but we've a sneaking idea who wrote it. “The Earth” Feb 5th, 1920. ir sixty-five mile wave we’re very glad to hear you haven’t been calling years, ‘cause your sigs | I'm afraid you’ve been p, we've been busy down ix years trying to make ‘or the Democrats and it t we kill off a few million shed our end. Things vn a little now so we just en up on the sixty-five of something to do. 1 were poking the letter is warn you right now, ised that letter when he Pond and he may have a this time like he has on though sent act patent DeFore The f t of it is, Charlie, we’ve been | for a helluva while and we just e it was you. Gee, we though tatic and strays and we’ve been b kinds of jiggers to tune you ou wise now that those X’s were fr \re on your key, Harmonics etc to pardon the delay and our st not tuning up on that wave. You pardon us for writing in- stead ring by Radio. You see, we go down here, and they’re peeved ve know how to send the Intern de while they themselves know is the letter “J. When Peace ed we'll send you a few V's « meters. Plea but +h have t answer are y sions a without about a toy our abrupt manner etc., few important things we u before we close. Please What kind of a Rotary make, etc..—also dimen- be heard in the next room tagraph? Have you heard lerson’s alternator? uite | Are you using a Mars ground or a counterpoise and if so why? Do you get POZ up there? What’s Venus’ cal] and her first name? Does she os- cillate? Know anything about jazz? What’s her wave like? Is it a long train, damped or just moist? How long have you known her? Are there any Red Heads there? Does Venus work after Arlington sends his press to her? Is there anyone there that can do my washing; we can’t find a dam soul in Marion. Do you know who W. J. Bryan is? Has Billy Sunday been there yet? What’s the price of Booze? Can you get it without having the Flu? Have you heard of the American Radio Relay League? Can we handle any traffic for you? Do you hear 2ZS? How many amps do you put in your aerial? Was the meter made in Germany? Does your key ever stick? Where do you put that key? Who operates it? Did he go to the Eastern Radio Institute? Do you get the Boston Post up there? Will you tell us a good answer for Limerick No. 23? How may kilowatts do you use? Is it right your aerial is seven miles long? Do you want to buy a Marconi Spark Dis- charger? Do you want it with or without bearings? Do you know A. C. Forbes? Did he sell his coughdrop? Do you know who hit Billy Paterson? “Ask dad—he knows.” Last of all, Bo, Gawler says you've gotta cut your decrement down. Lord, but its broad—something fierce. You know the air ain’t free like it used to be—we’re running it down here to suit ourselves and what Gawler says goes. Get down to two tenths or he’ll be up in that enclosed auto after you. Yours truly, The Gang. A LITTLE JOURNEY (Concluded from page 16) west are not as small or confined, as is true in the east. Why these things should be so, or what makes them so, are questions that, so far as I know, have never been satisfactorily and definitely answered. The ways of radio are dark and mysterious.

Page 21

March, 1920 QST A New Regenerative Receiver for Relay Wave Lengths By William F. Diehl ODERN Short Wave Receiver de- sign having resolved itself into the employment of the Armstrong Cir- cuits, it remains for the Radio Engineer to design apparatus in which full advantage is taken of the possibilities of these circuits. Although there are several methods of using them for short wave lengths, there is one which is pre-eminently adapted to the require- ments of Relay Communication. This is the tuned grid and plate circuit, employing continuously variable inductances. The service in which a Relay Receiver is used and the conditions under which this service must be maintained demand the ’ fulfillment of the following requirements: 1. Selectivity 2. Amplification 3. Flexibility 4. Rapid adjusment. In the Grebe type CR-3, maximum selectivity is obtained by the use of a variometer for tuning the grid circuit, thus eliminating shunt and stray capacities. A high degree of amplification is accomplish- ed by tuning the plate circujt with a second variometer. The comparatively small wave length range (150-375 meters) assures great flexibility, inasmuch as the change in wave length approximates 2 meters per scale division. Rapid adjust- ment is made possible by the reduction to a minimum of the tuning elements. Figure 1 shows the front of the Receiver. From left to right will be seen the control dials for the grid variometer, coupler and plate variometer. The two binding posts at the extreme left are for antenna and ground connections. Terminals for the vacuum tube detector unit are at the extreme right. Figure 2 shows the interior of the set. The general construction of the Type CR-3 is along standardized lines. e panel, which is made of Bakelite Dilecto, 6%” x 19%”, supports the entire assembly. The coupler unit is mounted on a shelf, which extends from the back of the panel. The primary is wound on a cylindrical Formica tube and is divided into sections, from which leads are brought to the selector switches operating from the front of the panel. The coupler secondary is rotatable through an angle of 90 degrees, and its position with relation to the primary is indicated by the beveled dial directly above the switches. The grid and plate variometers are of the familiar Grebe design but have been specially wound for the wavelength range mentioned above. The positions of the dials indicate respectively the wave length and the point of maximum amplification. The use of large knobs assures easy and accurate operating contro] and the beveled and carefully graduated dials make the original adjustments and subsequent re- settings absolute. Rigid and direct wiring results from the use of heavy nickel-plated copper bus, supplemented by flexible connections, which latter are covered with varnished tubing. The cabinet is constructed of quartered oak, stained and wax finished. Its hinged cover permits of instant inspection of all parts of the set. The operation of the CR-3 consists essentially of bringing three circuits into resonance—Primary, or antenna circuit,

Page 22

20 QsT March, 1920 than compensates for the reduced tuning limits. Furthermore, the agitation in favor of using wave lengths below 200 meters in order to improve traffic conditions justifies the sacrifice of the higher wave lengths in order to include the lower. However, as there are often occasions when it is desirable to tune in wave lengths in- cluding 600 meters, provision is made with this set to change its normal wave length range of 150-375 meters to 250-680 meters. This is done by the addition of a very small, low resistance mica condenser, which is placed in shunt with the secondary cir- cuit. The capacity of this condenser is so small, compared with the value of second- ary inductance, that the working efficiency of the set on the upper range is unimpaired. Secor reuit, and Oscillating or plats ‘or t 1 given wave length (assur the Grid Variometer is adju setting corresponding to this A curve furnished with ea ; the correct settings for the var ngths. It may be noted that rresponds to a setting of 25 t the Grid Variometer in this po the Plate Variometer to the ere the oscillating con- dition hed. This is indicated by a f llowed by a soft hissing sound phone. The grid and plate cit w in resonance, and it remains the Primary to the same period vith the switches in the zero turns of primary in- ductat resonant point is reach- ed At t the hissing sound in the telep! lecrease and may be elimir by a final adjustment of the he may only be obtained when t tube detector is operating at m ficiency, which depends largely correct values of plate voltages ent current, as well as the us¢ per grid condenser and leak Ther i difference of opinion among 1s to the most effective method he Primary circuit; i.e., by var apacity or by fine in- ductar In the Grebe Type CR-3 may be employed, as the * switch makes possible the the series condenser. Howe ictance value of the Primar ntly large to allow the use of yndenser, when desired It 1 r that the wave length range is inadequate, but when it is that the vast majority of amat ; are transmitting on a narrow wave lengths, the great increa bility afforded by this wave lengths more instru! hese A number of these receivers are now in active service in some of the most prom- inent Relay Stations, and from reports thus far received, it is believed that this re- ceiver will play an important part in American Relay service. USE OF HONEYCOMB COILS (Concluded from page 13) distance of about 1640 miles, are heard throughout the day nicely. Other spark stations on these short waves are NJK, 950 miles; VPN, 1000 miles; NAR, 1050 miles; M, 1150 miles; NAW, 1350 miles; NSC, 1500 miles; US, 1540 miles; NJG, 1550 miles; together with all others be- tween NBD and NJK and several of the Texas Forts whose exact location I do not know, but all of which are well over a thousand miles. This is all absolutely day- light work, and I think speaks wonders for the efficiency of the honeycombs and single VT. On the 600 meter wave the com- bination is equally as effective as on other waves, and as I note “One Dee Eye”, on page 28 of your December issue, asks some one to shoot at his range, will say his long distance station, BZL located at Demerara, British Guiana, is heard here almost every night strong enough to copy nicely with

Page 23

-— e March, 1920 Q phones held at full arm’s length. While this station is about 125 miles closer to me than to 1DI, the little difference doesn’t amount to much, considering the total distance covered. Mr. Gisburne is doing fine work, of which he has a just right to be proud, and in his article on page 17 “On Handling Traffic’ I heartily agree with his remarks about “phoney” hook-ups and a multiplicity of tuning devices which tend to decrease rather than increase the everyday working efficiency of a set. The enclosed hookup is without doubt one of the most simple and efficient ones for all around work for use with the Honeycombs. It is nothing new, but one of great merit and the same as used by me in obtaining the results previously described. ADDENDUM The curve of Figure 2 shows the tuning of the Honeycomb Coil No. L-1500 and Murdock 43-plate variable as used in my set. While not correct in all details, this curve represents the exact condenser settings for the different stations, and the approximate waves correspond very closely to the waves said to be used by those stations. Differing lengths of secondary leads will give variations from the curve, but they will be slight, and it will answer the burning question of where to locate a station. RADIO CLUB ORGANIZATION (Continued from page 6) parisons of experiences and results of experiments on the part of the members are always of interest. Radio men of prominence from neighboring towns may be invited to address the club, and it will be found that they very seldom refuse, since radio men are always glad to talk before an interested audience, in common with the rest of humanity. CLUBS IN LARGE CITIES The formation of a club in a large city presents more complicated problems than does that in a small town, inasmuch as relations must be made and kept with other clubs, and individuals. There are two classes of clubs in large cities, namely community clubs and school organizations. It is an unfortunate fact that more or less unpleasant friction is usually existant be- tween such associations. A method of organization will be discussed later in this article by which such friction may be eliminated. A community club should be organized in almost the same manner in which the club in a small town was formed. However, the membership should not be subject to any iron-clad restrictions as to membership being limited to any certain locality. The community club should be ST 21 representative of the locality in which it is located, but members living in other parts of the city should not be excluded, as such action leads to sectional feeling, which is undesirable. It will usually be found that a city park or other civic organ- ization is willing to assist in the provision of meeting places and other such facilities, if the club members show themselves to be in earnest. It is suggested that there be two classes of memberships to such clubs, senior and junior, the boundary lines be- tween the two being age and ability of the members. This provides an incentive to- ward the improvement of the ability of members who are not the equal of the rest of the club, and also keeps the executive control in the hands of the older and more experienced members, if the junior mem- berships do not carry with them the right to a vote. SCHOOL CLUBS School clubs are formed at the instiga- tion or with the assistance of the faculty of the sehool and are usually organized primarily for the education of the mem- bers. The other activities are suberdin- ated to this, especially if the faculty mem- ber behind the club is strong-minded. In these clubs, of course, membership is limited to the students at the school, and their organization is considerably simpler than that of the community associations. School clubs have the advantage of the co-operation of the school laboratory de- partments in providing apparatus, and ac- cordingly there should be no difficulty in sustaining interest in such organizations. There should be no restrictions on the members of these clubs affecting their membership in other organizations, such as community clubs. The actual organ- ization of community, school, and small town clubs is the same in each case. AFFILIATING SMALL TOWN CLUBS The affiliation of local clubs with the League requires different handling for different cases. In the case of the small town club, the affiliation should be ac- complished in the regular way, by applica- tion to the Board of Direction of the League, through a local traffic department representative, or through the Secretary of the League, at Hartford. A point often not appreciated in this respect is the fact that it is not necessary that every member of a club be also a member of the League in order to effect the affiliation of the Club. All that is necessary is that the resolution of affiliation as given on page 7 of the August issue of QST magazine, be passed by a majority vote of the membership, or in some cases a plurality vote will be sufficient, depending on the constitution of the club. This resolution should be duly

Page 24

signed Directior channels applicat ment of then be r for final then rec admitted of the L« AFF I The af is hand that in only on other ex formed in the ‘ it has | Plan”’. tween closely clubs n done | compost and Secr Council League, it be Manager Council terferen minister Meetings often as not inte dividual! dividual hold their the only actions | traffic re It is extr tion me all the month. directio1 be held operatio! member In the operatin should Council The api body be As fast affiliate be giv: Council ministra

rded to the Board of League through the above, after which the to the Traffic Depart- 1e for approval and will to the Board of Direction The affiliated club will icial charter and will be rticipation in the affairs ING CITY CLUBS f a club in a large town y the same manner as n, when the club is the ity. When there are a better plan has been rganization now exists go, and for this reason name of the “Chicago » eliminate friction be- 1s individual clubs, a association of these ed. This Gam best be an Executive Council President, Vice-Presifent isurer of each club. This nder the control of the extremely advisable that e control of the City city in question. This trol local traffic and in- hould in general ad- radio affairs in the city. yuncil should be held as Its activities should any way with the in- activities of the in- These separate clubs may whenever they wish and ence with any of their incil will be in regard to and interference control. visable to hold combina- the entire membership of at intervals of about a etings will be under the <ecutive Council and will irpose of promoting co- xd feeling between the ndividual organizations. ss being formed in cities such a plan, application through the Executive ition with the League. il be approved by that forwarded to the League. in any given city are ficers should automatically ership in the Executive ild take part in the ad- ocal affairs. This plan QsT

March, 1920

gives every club an equal voice in the action taken about all local radio matters and has been found to be the most equit- able method of handling the complicated situation that exists in most of our larger cities. Few cities have a more effective organ- ization of this type than does Chicago. In this city there are four existing clubs, each of considerable size, the officers of which form the Executive Council as out- lined in the foregoing paragraph. Radio matters are handled efficiently by this body, under the direction of the Chicago City Manager, who is Chairman of the Council. Very close co-operation is effected with the local Radio Inspector and on this ac- count excellent regulation of traffic and interference is secured. This plan can be heartily recommended to all cities of size comparable with” that of Chicago. In Indianapolis we have a very efficient ex- ample of a large city with but one radio club under the direction of the District Superintendent of Southern Indiana, Mr. F. H. Hamilton, who has administered the affairs of the city in excellent fashion. St. Louis is another example of this type of organization. In most large cities the formation of one single club with all the local amateurs as members is not possible, because of the existence of high school and college clubs which cannot of necessity abandon or merge their individuality. The use of the “Chicago Plan” is recommended in such cases. Whichever plan is followed, it is certain that the radio art in general will be im- proved by the formation of local clubs in every community in the country and their affiliation with the League, and we look forward to the time when we have an organization representative of every radio man in the United States.

I went To SEE THE eo APO THIS 6 HOW I FOUND Hw

i

Page 25

March, 1920 QST ss Editorialy dat Celt AMBRICAN Rapio RELAY LEAGUE OUR NEW DIRECTORS UST as this QST goes to press our Board of Direction has had a meeting at which a new Board for the coming two years was elected. For the most part the names are the same, but there are a few new faces. Because the A.R.R.L. is wholly non-commercial and must never be in a position where it can be criticized from that standpoint, our constitution provides that no person engaged in the manufacture or sale of amateur apparatus is eligible to mem- bership on our Board. Through that provision, wise as it doubtless is, we lose with deep regret the services of two old and tried members who have entered the amateur apparatus field: Mr. Clarence D. Tuska, of the C. D. Tuska Co., and Mr. R. H. G. Mathews, of the Chicago Radio Laboratory. These men are well-known to all of us— they have helped in glorious fashion to make amateur radio what it is today. Our best wishes go with them in their new work—but may they ever be Amateurs at heart! Filling these places and two other vacancies on our Board are four new men, Messrs. John M. Clayton, Francis H. Hamilton, A. E. Bessey, and M. B. West. Mr. Clayton’s photograph appears elsewhere in this issue, so we won’t say much about him here. We all know 5BV-AF-ZL anyway. Mr. Hamilton is that live-wire organizer you’ve heard about in Indiana; the A.R.R.L. District Superintendent for the southern end of the state, in other words. He is the proud possessor of what has been called the prettiest amateur tone—FH, now 9ZJ, Indianapolis. Mr. Bessey is a new-comer in our ranks but his present rate of spee a promises to make up for lost time, and he has been working hard for the A.R.R.L. organization in his territory. He’s 6BR, of Sunnyvale, California, with an efficient station (hears 9ZN) and the keenest interest in League affairs—which are the main essentials, nesspah? Introduction of Mr. West is wholly unnecessary. As old 8AEZ of pre-war days he acquired everlasting amateur fame beyond the need of.our poor boosting. His present location at Waukegan within the shadow of NAJ has kept him from the enjoyment of a station this season, but he’s there with the knowledge and the ideas. These four men we welcome to our Board with the old A.R.R.L. spirit. We're glad to have you with us, and know that the strength and inspiration you bring to us will do much in furthering the onward march of Amateur Radio. We've never had a meeting at which all the members of our Board could be present, for it takes considerably longer than the speed of radio waves to get up this way from Texas or Florida or California. But don’t you know, fellows, sometimes when we lean back in this old bow-legged chair and refill our pipe, we get all enthused over the idea of an A. R. R. L. convention. It may be this new jar of Prince Albert, or it may be the general state of happiness induced by this letter we’ve just got from our girl, but we do like to think of all the fun we would have when we can succeed in rounding up all our

Page 26

organ some of al ating and ha ‘Really And we legisla prepar not Th toatl legge H" bers! the I has print and That for t me With 1 of Qs we'll h rate bersl start differir scT pt we our T the tions, the supp gettir in!), doll iT can we for A.! do course the n« ly defer mvention to be held in such as Chicago. Think ers and all of our oper- meeting face to face ce to ask the question, lo my signals come in?” e the ability to adequate- es against unfavorable tter we must always be because our enemies are y means. lows. That’s what comes leans back in an old bow- e-fills his pipe. Announcement tE QST always has been non-members of our 1.50 a year, the $2 mem- neluding it. Now that owns QST that policy inconsistent, and we it a test which con- expiration notices we ne for straight renewal for joining the League. has been almost solid rate subscription arrange- the board as outgrown. ber the newsstand price twenty cents—meaning ter QST—and the yearly lollars, including mem- eague just as before. To system and reconcile the membership and sub- ns now on our books, mbership certificates to member subscribers up to ration of their subscrip- arge, so that thereafter pire simultaneously. spread this news. We next five years we'll be le red coupons (remember n 1917?—they still come be some time before the f stop reaching us; so you nwhile whatever amounts be credited for as many they will cover. ler who is not enthusiastic ranization and what we can vork is a rare bird. Of be available separately on but we’d like to have him nd make a believer out of | up our membership. The H-T-L Club it walked into our sanctum lay with a new one. Like - efforts it is based upon a etter results and have a QsT March, 1920 little more fun. This time it is a new Club. It is to be formed from among the members of the A.R.R.L. who GO HOME TO LUNCH. That’s where it gets its name—THE HOME-TO-LUNCH CLUB. Anybody in the A.R.R.L. is eligible if he goes home to lunch and therefore is in a position to work his station between 12:30 and 1:30 mid-day. Of course everybody is not able to go home to lunch and in con- sequence only a limited number can work, and hence down goes QRM. In other words, an automatic method of reducing inter- ference so traffic can be cleared which hangs up at night. In addition to its limiting the number of stations which will be in the air it will also have the beneficial effects of cutting down long distance QRM because day-light will attend to that. Strikes us as quite an idea. It strongly suggests Mr. Hebert’s “EARLY BIRD CLUB” of pre-war days. In Mr. Hebert’s case, however, one had to get up at 5 A.M. This is not as easy as it sounds and prob- ably would make for still greater exclusive- ness. One dislikes to miss the fun that goes on late at night, but one simply must in order to get up at five in the morning. So, it looks as though the HOME-TO- LUNCH outfit would be an improvement because one can enjoy both the night life effect and also take in the mid-day work- ing—provided always, that one goes home to lunch. Join up, you chaps who are fortunate enough to have a business which enables you to go home at noon. It is already in working operation and all you have to do is to send out a CQ between 12:30 and 1:30 any mid-day to become a member. Next, please. The Canadian Lid T’S our time to congratulate you, Canadians, and it gives us lots of pleasure to do it. Canadian stations along the Great Lakes and St. Lawrence River have been author- ized to use the 200 meter wave until the opening of navigation as per the copy of order appearing elsewhere in this issue. This is splendid, and it comes most opportunely, with the opening of A.R.R.L. activities in the newly-formed Canadian Divisions. Now for some good work, and again our best wishes! But let us say a word of warning. The opening order makes it plain that you are on your good behavior. The consensus of Canadian opinion is that if the law is respected and no trouble is caused, the privilege of using 200 meters during the winter months—the relay reason, when ability to work is most needed—will be made a permanent one. We _ therefore urge upon you the greatest care in seeing that you do not exceed 200 meters and a lt ls

Page 27

+: li ll ec. © ly ee ee ee tow - March, 1920 that your tune is sharp. Don’t let this permit be rescinded because of someone’s carelessness—let your authorities see that their trust was well-founded, that the feature may be extended to the rest of the country and made permanent. We’re for you, and want to help. Patience! at having trouble getting hold of the equipment and materials you ordered? Patience! So are we, and our neighbor, and your neighbor, and everybody else The stuff doesn’t exist—tthat’s the reason for the delay. Can you visualize the amount of business which was heaped upon our manufacturers and dealers when we opened up in October? Just think of the hundreds of thousands of dollars worth which it totals—the accumulated needs of a nation of amateurs. The logical happened; the surplus was immediately ex- hausted and the factories struggle vainly to keep up with the demand. But now they’re catching up, slowly but surely. We know one factory which a month ago was three months behind in its order; now it’s only two months behind. We know all our manufacturers and dealers are honest and that they’re doing their best for us. The rush has just been too much for any business which did not have vast reserve stocks of everything from solder to pliotrons. Soon things will be normal again. Until then, patience! The Sixth District S the Sixth District backward? We hope not, and really we do not believe it is. In pre-war days the amateur activity there was remarkable, and every- body knows the good work which was accomplished The Pacific Slope is very important territory, containing the terminals of all our coast to coast routes, and it must not drop behind But something seems to be the matter. Several good A.R.R.L. men n the Ninth District are weeping bitter tears because they hear sixes but can get no response to their calls. And the sixes don’t seem to hear any nines at all. Right there seems to be the trouble. Our West Coast correspondent tells us that one-and two stage amplifiers are just coming into adoption among the Pacificers! 6EA is heard in St. Louis, 9BT reports sixes regularly, and other stations in the Valley hear them. Doesn’t it seem logical that if the standard of equipment there were as high as in the other districts, some nines would percolate thru and communi- QsT 25 cation have been’ established across the Rockies long ago? Give it a thought, West Cost Amateurs. Fix up your amplifiers and let’s get thru to you. QRM—and QRM HERE is no use fooling around with it; we must take up the question of QRM. We do not mean the old pre- war variety of QRM. We mean that which comes legitimately from stations which are working and have a perfectly good right to work. It is like the commercial brand. And like the commercia] it is gettrng worse every night. Of course we can reduce it by improving the operation of certain of our members Some of them certainly need a gentle hint about calling too many times, repeating too many times and hold- ing the air too long on a stretch. This is especially bad when it comes from some of the very loud amateurs, because actually the whole country East of the River has to stand by when they work. An example is that we here at Headquarters in Hart- ford often cannot work Springfield, Mass., only 25 miles away, when 8ER is going or 8CC either. We suppose 1AW causes similar trouble. This can be improved by being economical of signals and of time also. But the real solution is in SELEC- TIVITY. We amateurs have always been away ahead of the commercials in _ sen- sitiveness of our receiving sets. The rea- son is that we are perfectly willing to put up with little troubles and to struggle to get signals. Little matters like instability of a bulb do not bother us. We go ahead and put up with them. But now we must go up to the head of the class in other things too. We must exceed general practice in sharpness of transmitting wave and in selectivity of receiving. Only then can a large number of us hope to work on a narrow band of wave lengths. In theory we really have no chance at all, because if the whole bunch of us were right on 200 meters it would be some thick. But in practice we are not all on 200. Some are below and some are above. But the variation is small, or should be, and this is where we must apply our superior patience, skill and brains and secure super-sensitive selectivity. Our manufacturers can afford to consider this fact. We will buy all right. We listened in on a set the other evening which promises big things. Stations which ordinarily would absolutely kill work- ing were tuned down so that the weak one could be read easily. The laws governing selectivity have not been ventilated very much. It is the big question of the im- mediate future in amateur radio in our opinion. Let the scientific ones among us come forward and tell the rest of use what we can do and how to do it.

Page 28

Tt The I agers gradual on the genera to say, separat Mountai than tl York a1 The 1 traffic w regul ir England York a some tr over irregular There traffic relays commul Ther: of the | mind, some successf jumps And fre Of c¢ distar station during station it is pr certain! the oth going work 4.988 eo be for The part of by cor relays, r approx full po present caused distanc handica! time The amateu! :f DEPARTMENT J. O. SMITH ville Centre, L. I. MANAGER various division man- department show a of pre-war activities iteur radio stations in lition, however, strange true of isolated, widely such as the Rocky and Pacific Division, territory, between New that we cannot handle nty of promptness or New York and New is true between New and west. Of course r handled at intervals only at infrequent, to successfully handle , and that is in short make possible reliable ler daylight conditions. tation owners, members i fellows, and of sound but who will not, for ntent to be part of a of relaying in short 1,000 miles, or bust. r bust. emptation to work long but the real test of any , to give regular service er 75 or 100 miles. If ll once try this method, to become a habit. It more satisfactory. On a dozen stations are to handle all the relay rue, what are the other ’ What reason will there nopolizing traffic on the ns is wrong and is here- raffic should go by short nly the use of low power of the time instead of of the time as under The unnecessary QRM ual attempts at long- one of the greatest eur radio at the present al report of Canadian es is included in this QST )DERATING March, 1920 Y month’s report. The new manager of the Ontario Division, Mr. A. H. K. Russell, 353 Markham St., Toronto, Ontario, reports that the amateur wave length in Canada, from the Gulf to the Lakes, has been raised to 200 meters, until opening of navigation in the spring. There is a possibility that it may be allowed permanently. Mr. Albert J. Lorimer, 243 Mackay St., Montreal, Quebec, has been appointed manager of the St. Lawrence Division. It was hoped that appointments of managers for the other Canadian divisions could be made in time to announce them in this issue, but this was not possible. The managers of the, Atlantic, Central, Rocky Mountain and Pacific Divisions re- port, however, that considerable traffic is now being handled across the border. In connection with this, all members of the traffic department are requested to note that all messages to or from Canadian points are properly dated or addressed, that is, that the address contains a town, Province and specifies Canada, and that messages from Canada carry the town, Province, and word Canada, in every case, as point of origin. All members of the Operating Depart- ment are requested to carefully observe the Traffic Rules and Regulations, as printed in the February issue. In order to maintain an efficient and orderly organ- ization, it is necessary that definite rules of conduct be followed, and the Traffic Rules and Regulations as adopted by the League provide the foundation for a successful organization, if observed at all times by the individual members of the Operating Department. Another enlargement of the League’s traffic department has been made. When our cousins up in our territory of the Midnight Sun read of our expansion and the creation of our four Canadian divisions, they immediately requested recognition, with the result that a new division, em- bracing Alaska, and called the Alaskan Divisio:-. has been created. It is hoped that it vill be possible to announce a manager for this new division in the next issue. The reports of the Division Managers in detail follow:

Page 29

March, 1920 ATLANTIC DIVISION. Mr. C. A. Service, Jr., Manager, Bala, Penna. At the writing of this report, relay con- ditions in the Atlantic Division have taken a considerable stride forward over those reported in last month’s, reliability of transmission between large centres is fair- ly well assured, the Canadian amateurs are being heard from and are included in the present scheme of our League Operating Department, and all other conditions in- dicate that we have a real live organization of stations working in this Division. Each section will be taken up and reported on separately. Reports from our New England Assistant are very encouraging, as usual, and show he is getting the best work and co- operation from his District Superintend- ents in keeping them constantly on watch to place new stations. Much attention is being directed toward the development of Branch Lines into out- lying districts of New England, now that through lines are in fairly satisfactory operation. We note with pleasure that the Canadian government has temporarily allowed its amateurs the use of a 200 meter wave in all places and if no interference is experi- enced by commercial stations, it will be- come a permanent institution and ama- teur relay work in Canada should experi- ence a decided boom. Mr. Entwistle’s report also shows all sections in the central part of New England are wideawake to handle relay work with the best dispatch. As regards the Middle Section of the Division, Mr. McIntire’s report shows con- ditions between large centres satisfactory but the outlying districts are still sluggish = need constant pushing to get them in ine. The route to Buffalo is working well and a letter from the new Ontario Division Manager states that he hears Buffalo stations in Toronto without trouble; he is particularly anxious to connect with the Buffalo stations and amateurs in the ad- pacent part of the Atlantic Division should communicate with Mr. Fraser, the District Superintendent for Western New York, if they want to get in on this work. The appointment of Mr. Frye of Vine- and, N. J. should result in increased activity among amateurs in South Jersey. A seacoast branch is badly needed, and organization of it now will assure its satis- factory working during the summer months when traffic will be heavy. Mr. Frye has been working on a route from Vineland to Washington and it may be possible to use him as an alternate route to Trunk Line “D” from Philadelphia to Washington. QSsT 27 The Division Manager has accepted with regret the resignation of Mr. McIntire as Assistant Division Manager for the Middle Section of the Atlantic Division. His successor will be appointed in the course of a few weeks. Relay conditions over the Southern Section are not as satisfactory as could be wished; the route from Philadelphia to Washington and Danville is still in- operative, notwithstanding the efforts of the Assistant Division Manager, Mr. Stewart, and his District Superintendents. Mr. Gravely, 3BZ of Danville Va., is wait- ing to connect up with this line and for- ward traffic southward into the East Gulf Division but so far has confined himself to long distance work in other directions. Stations through Pennsylvania are slow- ly opening up and getting in touch with their District Superintendents, which latter should be able to report the satisfactory operation of Trunk Line “B” and Branch Lines as shown in Mr. Stewart’s report of last month. Amateurs in Baltimore seem to be de- voting much time to the study of amplifiers and short wave reception so we will hope for the fruits of their labors to ripen into a real live relay route before the advent of the summer months. ATLANTIC DIVISION (Northern Section) Guy R. Entwistle, Ass’t Division Mgr. 136 Sutherland Road, Brookline, Mass. Latest reports from the office of the Radio Inspector show an increase in the number of second grade amateur licenses, or out of town radio stations. This is encouraging insomuch as our long distance relay men are included in this division. Vermont is gradually coming to the front. Mr. Sanford C. Lyons of Bennington, Vt., has offered his services to the league. Several others appearing on the call list have approached but as yet nothing has been heard in these cases. We are looking for some live wires around the Canadian border to assist Mr. Lorimer in breaking thru to New England. Lorimer writes, “From Montreal, Mr. Milette (Can. 2AI), has established day- light communication with Three Rivers and Farnam, Que., the latter being 40 miles east of Montreal and 25 miles north of the Vermont border, our stations there sign- ing 3Z. The former is 90 miles northeast of Montreal. There are many other stations that are copied 60 miles east at 2AS, Cowansville. “Station 3Z has been called by someone signing 2BN or 1BN whose sigs were QSA. Also heard in Montreal. No answer to our calls to him. May be man in St. Johnsbury using pre-war call. The Jesuit College in Montreal have been using 600

Page 30

QST March, 1920 XAA: now 2BC. He Pray, of Somerville, is also one of the CW is QSA Government permits short wavers. wavi here until April 15th That amateur activity is increasing in as al If satisfactory, wil] be this district is evident from the number of mad calls assigned up to date. Mr. Gawler has “AY rthern New England started in with 1CAA in the latest list of shoul h communication with calls. This is in the third alphabet of the 2Al, (( He has no difficulty in second series. : pickir New York stations and Pulley reports some interesting obser- 1AW idian stations around vations on.swinging. He finds that on the Montr ming along are 2AW, evenings that the western stations come 2AK, Several stations around QSA the 3’s are weak while when the 3’s Nicol Rivers with special come strong the 8’s fade. Amateurs should licens f, 9AA, 9AB, 9AC.” try and complete data on the subject of 1IBH S.) reports as follows: fading or swinging and send it in to Editor Statior n appointed at Essex, QST for tabulation. What have been your Lyn ind. I have been co- observations? 1AW swings in Boston. : operat ir. Ham for tests thru to The condition of the atmosphere along Scar tbrook, Me. via Water- the coast as compared with that inland has ville, B nd Bangor, where D. F. probably something to do with it. The Alexa Northern Dist. Supt., is writer has had much experience with locat (r. Ricker of Essex, wil] swinging in commercial work around Long alterr BH in handling relay Island Sound which is as erratic a section trafl rict. Stations located in a8 any, from reports. New | nd Vermont are request- Why was the ether so quiet on Feb. 12th ed 1 Hardy, 776 Hale St., in New England? We were all at the ban- Bever Mass.. for tests. A direct quet! Turkey, entertainment, speakers and line everly, Greenfield and everything. Hope to see you again next Bratt! operation. Assistant year. ‘ Rad t District, Mr. Walter ATLANTIC DIVISION (Middle Section) J. But obtai fron - Mey po one M. A. McIntire, Ass’t Division Manager, r = “ptt . : 1127 Ave. G., Brooklyn, N. Y. Low n. The Lowell Radio + Ro ye : _ : esult of his efforts to The holidays being over, we start upon best 1 th ee into “the 4 new year in radio, and upon one which sa rn ona Me eaartess undoubtedly will be one of the best.” New . 1K) “ stall : with te t. stations are springing up everywhere, the iT] -% = BUCK Pe — old ones again getting back on the job in The Dy “hi ‘+i members. real earnest and with the publication of Bat ret se lation. QST’s Directory of Call Letters, we are . oa er has at last won out again able to know whom we are working with | ht people and should be with. Se aol a . =_ _ From the reports of the District Super- tiie n ne ORM. St Mon ng intendents, we find that things are moving Fitch! yay Millbury Atel di along in fairly good style. As before the eee . al ; yi dis an war, we have a number of long jumps to anion OSA. t tay ong distance account for, and this makes it difficult to ; is ~ al ; 6 d ; get “rush” messages through, and traffic is Souths Soe ne ne down In _ subject to delay. ' a. oh ny Th sitter — see 2ZM reports that things in New Jersey oa 6 ee. ° 30 a8 Be Ae are coming around in good shape. Traffic St afi AW. 20, 1 oy —_ south has been handled mostly by 2RE, Ae he — working 2CB, 2L0, and 3CS. 3CS is in almost (TA Ci e iith. every night and has no trouble in working Fe aaa Se recently through to Philadelphia. There being a a i a tnd has been laid up number of good stations around Newark, o. : +i hs al Hospital. His Paterson and the Oranges; delivery is very OM : ‘all im agam. prompt in this section. Most of the eastern = oe excellent work west and traffic is being sent direct to 2JU or 2ZS ~ =. em to unload his traffic with an occassional few to 1AW when sigs a ons here report him get through. Traffic direct north to Buffalo ap is being handled via 8CC and 8AD. When Stu and Fred Bowditch of possible traffic west of Pennsylvania is sent Broo} tims of the undamped_ direct to 8ER. trans! n be heard most any No reports have been received from Mr. afterr ng testing out. Both Runyon or Mr. Fraser; hence we cannot are o| W.A. members. Francis report anything for their Districts. We

Page 31

— igre = 9.2. Cer en eee RT March, 1920 have heard Mr. Runyon working a number of long distance stations and know that he is in touch with almost everybody that shoots a spark; however, we would like to hear from him. The Hudson River Valley is being well covered by the following stations: E. M. Williams of Troy, N. Y., 2EH; Troy YMCA Radio Club, Troy, N. Y., 2SZ; 2BM at Hudson, N. Y.; 2FG at Albany (old 2AGJ’s set); 200 at Poughkeepsie, N. Y.; 2DA at Poughkeepsie, N. Y., and several others. Things up Connecticut way seem to be more or less at a standstill as far as trunk lines is concerned. We have not heard from Friend Nichols in some little time, and with the exception of 1AW and 1AS have heard very few fellows sign off from that section. 2JU reports that things are in good shape around Brooklyn and Long Island. The following stations have done. consider- able work in getting traffic through: 2CS; 20W; 2QA; 2PF; 2WO; 2EC; ete. We have heard from a few Long Island Stations and expect to have them lined up in the near future. We want to get the line out on Long Island in the shape we had it at one time before, when we could get stuff into Connecticut without much trouble. As most of us are near a good sized city, where QRM is abundant, it is urged that we all comply strictly to the rule of using minimum power in transmitting to nearby stations. As we well know, this is one of the Ratlio Laws and we should comply with it. ATLANTIC DIVISION (Southern Section) Chas. H. Stewarg, Ass’t Division Manager, St. David's Pa. Reports received from the various District Superintendents indicate that relay con- ditions in this Section of the Division are not improving to the extent that we had been looking forward to. There has been some long distance work accomplished on the part of stations located in this Section with stations in the Middle Section and stations in the Central Division, but the present state of organization of the Trunk Lines through this territory can by no means be considered satisfactory. On Trunk Line D, for messages between New York and Philadelphia, conditions may be looked upon as reasonably satis- factory, but the situation south of Wilming- ton, Del., remains as yet unsolved. As regards the work on Trunk Line B, while no satisfactory results have yet been attained, the situation is a much more encouraging one, and stations are being located which we believe will later fit to- gether into a working organization. Since the last report Mr. Malcolm Ferris, 3409 Baring Street, Philadelphia, has been QsT 29 appointed District Superintendent for the Eastern Penna. District, and entered upon his duties with a supply of enthusiasm and energy that is most encouraging. Mr. Ferris is an old-timer in radio, and should have the hearty support of station owners in his District, who are urged to get into communication with him as promptly as possible. It is especially desired to hear from stations in the vicinity of West Chester, Coatesville, York, Gettysburg, Pottstown, Reading and Pottsville. With good stations at some of these points, re- liable communication ought to be had as far west as Milton, Pa. in the Central Penna. District. Mr. Ferris reports that outside of stations at St. David’s, Pa. (83ZS) and Norristown, Pa., (3BH), no. stations have been definitely located on Trunk Line B but that efforts are being made to locate additional stations on this Line. On Trunk Line D, he states that traffic is being handled in large volume between 3CS, Trenton, N. J., and 3CC, Abington, Pa. (Philadelphia District) and that 3CE at Norwood, Pa., can connect with the Philadelphia stations and also work reliably with 8BE at Wil- mington, Del. The report from the Central Penna. District Superintendent, Mr. Cawley, of Milton, Pa., indicates lack of known stations between that point and Curwens- ville, Pa. to connect up Trunk Line B. He has hoped that the station of Mr. Irvin at the latter named point could be depend- ed upon, but no communication has yet been had with Curwensville. Regarding Branch Line No. 3, Mr. Cawley would like to locate stations in the vicinity of Towanda or Sayre, Pa. Mr. Cawley, in connection with his Assistant, Mr. Walleze, is expect- ing to get a reliable station working in Milton within a very short time. Mr. Devinney, Superintendent Western Penna. District, reports that he has not yet been able to get sufficiently in touch with operations in his District to make what he considered a satisfactory report. He states that the station of the Alexander Brothers (8JQ) at Washington, Pa., has handled about 150 messages; also that the station of B. P. Williams (8EN) in Pitts- burgh, has handled about 100 messages. The report of Mr. Horn, Superintendent for Delaware, is to the effect that con- ditions appear to be more encouraging, and he is hoping to be able to locate a station to the south of Wilmington soon, to con- nect up with Baltimore stations. Mr. Duvall,. Superintendent Eastern Maryland District, reports that radio activities in the Baltimore District have increased during the past month, and that the Baltimore Radio Association has been devoting considerable attention to the study of amplifiers and short wave re-

Page 32

ped that this will result in it ng ranges in stations in th fe calls attention to the fact \N) has done some excell nee work. Duvall calls that Yearly will be on ul very night for relay irranging for a watch aft wrder to avoid local QRM tates that his call is 3EM that anyone who hears him, e Philadelphia District, n received from the Su; District of Columbia, nor y, of Danville, Super- in 1, but it is hoped that a ll be forthcoming next \ULF DIVISION er, Jr.. Manager, " National Bank Bldg., ksonville, Fla. De regular relay lines thr ry is still not as fast as but progress is being m Pope, Assistant Division Mar Eastern Section of this Divis yng other things, the foll , is getting his station rnals seem to be cover- 4AE at Jackson, mto ing nge. Ga., parently, of covering longet 4AT of Ft. Pierce, Flor od transmitting work and ean get an efficient re- ceive | be of great assistance in |} res into South Florida. 5BXA, hniec Institute, Auburn, Ala., heir station into shape and ¥ ry apparatus have com- mul AC, 5AU, 5AG, all of whor QSA. Ni port from Atlanta this understood that radio are being carried on tl endent Rice, at Jackson- vill t gotten his transmitter int to condenser troubles, re has heard, at his station AO ng: 1AW, 2CS, 2CX, OFT) 1:AX, 4AN, 8ER, 8JQ, ; ntea teler S T been unfavorable for section for some shone erable static and signals an this Mr ton, Assistant Division Mar Western Section, at Little Ros now 5ZL. He reports that temporarily down and has | mission for three weeks but t tion is about ready for is been pouring through Mexico, and out to the oper t to R QsT March, 1920 Pacific Coast. Most of the messages have passed through 9BT, 9BR, 5ZC, 5AC or from Mr. Clayton’s station direct to Roswell. Mr. Clayton reports that on Christmas Eve he handled 34 messages and cleared every one. This is certainly an excellent record. Mr. Greenlaw, now 5ZK, has his station in operation again and is doing splendid work; this also applies to Mr. deBen, City Manager at New Orleans. Mr. Greenlaw is getting the Louisiana situation into much better shape than it ever was before. Mr. W. L. Barrow, 918 Convention St., Baton Rouge, La., has been appointed official relay station in that city and is combining his efforts in Baton Rouge with Mr. Raymond. Mr. Arthur H. Kopper, United States Radio Inspector, at New Orleans, is giving his most hearty co- operation to the members of the league. The “Nola Radio Club” of New Orleans has just been formed and has applied for affiliation with the A.R.R.L.; its officers are as follows: Prof. Auguste J. Tete, President (Tulane University); Arthur H. Kopper, Vice President (U.S. Radio In- spector); Hubert R. deBen, Secretary- Treasurer (City Manager, A.R.R.L.). At a recent meeting of the Club, Mr. deBen gave a short talk on the A.R.R.L. and Mr. Kopper, the Radio Inspector, voluntarily spoke on the recognition the Government gave the members of the A.R.R.L. At last the Division Manager -has a license and almost a station. If you happen to hear the signals of 4BL hesitating in the ether you will recognize that the Division Manager is again learning to operate. However, befofe hot weather sets in it is hoped that at least one message will travel from Jacksonville to the Pacific - Coast and from Jacksonville to Head- quarters, at Hartford, Connecticut. ROCKY MOUNTAIN DIVISION M. S. Andelin, Manager, 21 N. W. Temple St., Salt Lake City, Utah. The lack of a Rocky Mountain Division report in last QST was due to the fact that conditions in this division had changed very little during that month. But now we have some things to report that will be very much of interest. We have our official A.R.R.L. station at Richfield, Utah, in operation at last, and Mr. Salisbury, the operator, has been working successfully and has accomplished results that are satisfactory. Messages have already been handled between 9JE, Colorado Springs, and 5ZA, Roswell, N. M., thru this station. 6EA and 6BQ report sigs QSA. Salt Lake City has always been a dead zone as far as long distance was concerned, except in a few cases. I have noticed,

Page 33

EE. March, 1920 however, that the farther south in the city we go, the better are the results; so I am erecting a station in the southern end of the city near where old 6ZV was located in the pre-war days. 6ZV was the old stand-by station of Salt Lake City and did some real good work. The call of my new station is 6JT. Mr. Kaar, 6ZA, was in communication with Colorado Springs for a time but it did not hold out long. The station is now being remodeled in an attempt to gain more efficiency. Colorado Springs has been in the game for a long time and has worked 6ZA, 6AL, LB, 9BT, and 5ZA. It also has been heard at Bear Creek, Mont., and El Paso, Tex. Mr. Reynolds has put forth every effort to put Trunk Line B on a working basis east and west of him. We have a new station in Idaho who has done very good work, having worked over 500 miles. This station is located at Moscow and will probably be the gateway to Portland, Ore., on Line G. Mr. Dawes, Superintendent for Montana, reports that he has been very busy lately getting the radio game in that state lined up. He has sent out circular letters to possible stations and is getting a few re- plies. He has located promising stations in Helena, Butte, Havre, Jordan, and several other places, and has been in mail communication with 9EE at Valley City, N. D. He has received a special license, new call 7ZD. The Rocky Mountain Division has been very slow to progress in some parts, due to scarcity of amateur stations, so that long distances have to be covered to bridge gaps. In addition, the topography is such that it interferes with long distance work, and is a great handicap to amateur relay work. PACIFIC DIVISION Seefred Bros., Division Managers 343 So. Fremont Ave., Los Angeles, Calif. Well, fellow relayers, at last the west coast is “booming-up” in “L.D.” amateur relaying. Relay traffic can be relayed from the east coast via 5ZA, 6GQ (ex-61Z), 6EB or 6EA or 6JD or 6TX (license pending) and severa] others in or near Los Angeles, 6VS (license pending) of San Fernando, Calif., 6CS, 6BR, 6AT, 6CO, 6BZ, 6AE, 6AM, 6CI, 6CL, 6AK or 6EJ, 6BQ, 6FE, 7ZB or 7DK, 7YS, 7CE, 7AU, 7AK, 7BF, 7AN, 7AD, and from there to 7CH, at Lewiston, Montana (license pending), ex- 6AL of Richfield, Utah, to the east. About a dozen messages have been handled with 5ZA direct from 6EA or 6EB at Los Angeles. Also about the same amount have been handled with Portland, Ore., direct. Fresno is now strong on the relay map with three good relay stations, 6CS, 6DK, and 6DH. QsT 31 Our test messages were started on Mon- day, January 12, 1920. Station 6EB broadcasted them and they were received direct by 7ZB at Portland; Oregon, who in turn, relayed to 7YS. On Thursday, January 15, 1920, station 6EA, broad- casted another test message which was re- ceived by 7YS, 7CR, 7DK, George Cameron, 7ZB, 6AK or 6EJ, 6BR, 6CO, and 6CS direct. Hereafter, stations 6EB or 6EA will broadcast test messages every Thurs- day night at 10 P.M. for all relayers of the League. Mr. J. L. Webster, Dist. Supt. at Seattle, Washington, reports the following: The amateurs around Seattle are just beginning to see what they can accomplish in long distance work. So far it has not been very successful, due, I think, to inefficient receiving apparatus. So far, 7AD has made the best record by working 6FE, and was heard by 7CH at Boise, Idaho. The amateurs with fairly good sets that ought to be able to do good work, and are in most every night are, 7AU, 7AK, and 7BF. TAN is also in sometimes and has been heard by Portland, Ore. 7CE is about the only Tacoma amateur that has been heard in Seattle to date. Mr. L. E. O’Brien, Dist. Supt. of Tacoma, Washington, reports the following: “The relay fever is taking hold in the west and we are hearing sigs from al] over the Pacific Coast. Trunk Line F has been completed thru Washington extending from Tacoma to Portland. The line thru Oregon is covered with a few long jumps. Wash- ington line is as follows: (Seattle, 7AU, Louis Webster, 2568 12 Avenue W,) (Tacoma, 7CE, Howard Riechart, 917 N. L. Street,) (Lacey, 7YS, St. Martins College,) (Portland, Oregon, 7ZB, 63 E. 68th Street, John D. Hertz.) “In Tacoma we have reorganized the Tacoma Radio Club, of which I was elected President. We have 40 members, a Wave Meter and a Wave Meter Squad, also an Interference Committee. Local QRM ceases at 9:00 P.M. We run out a test message for the Beginners to practice on at a speed of 5, 10 and 15 words per minute. The club has practically every amateur in town, so the contro] will be an easy matter. The club has taken up the educational side of radio and at present is negotiating with the City School Board to give a free radio course to our members and the public at large during night school period. This will secure additional mem- bers as well. The club is intending to affiliate with the A.R.R.L. shortly. “No word from Eastern Washington. Will have to work that end thru efforts of 7CH of Boise, Idaho. I can’t get in touch with anyone to take over the work. “Mr. Louis Webster 2568 12th Ave. W., will act as Dist. Supt. for Northern Wash-

Page 34

in ar to D mer Supt Trafl nm © best 7CH by I stat son abl let kne gut also ana do T nig! Mont agaltl fine the LAG that and 7YS to Ww ler con Mr ford { Distri fact mplating relay work ton, will please write neton, for appoint- ger and Asst. Dist. ne work for City lay and let someone ork before you do. e good trunk lines » act. ends a weather report 375 meters. He sincerely hope to okane along Trunk Portland, Oregon, to us that he has res transmitted and ed to date. He has the north with 7AK work 7YS the next icecess working with 6FE seems to come in is not much on the nk he would be just Francisco and Port- ZB and could handle next best of the york. Seldom have Portland, but he h QRM from the tation at Corvallis, y have a receiving and from what he th.a transmitter of Also there is a southern Oregon but have not been yet, and 6FE in a 1ys that he doesn’t 7CC has all of us by 6BQ and TYS, times there. George 1 half K.W. Packard a few days. He is eceiving. The other . working Lewistown, her night heard him s city is progressing ts regular meeting ng with the American was discussed. ns here at Portland the relay game. 7CR communication with e busy making efforts ire several others r sets so that before of at least a couple ht Some of the promising, too. Dist. Supt. for Stan- of the San Francisco following: progressing very satis- with the possible ex- QsT March, 1920 ception of the route north. Stations 6AT, 6BR, and 6AE have been handling practi- cally all the long distance work of the district. One or more of these stations is operating every night, and barring unusual circumstances, is able to carry on successful relay work with 6BQ at Reno, Nevada, and the Los Angeles amateurs. 6AT and 6AE have handied relay work very successfully with 7DK of Portland, Oregon upon a number of occasions, and at times relay work is carried on between 6AE and 7ZB, but not so easily. 2. Mr. Wise and Mr. Mealer of Walnut Grove, Calif., have been appointed as assistants in the Sacramento Valley, and are attempting to improve the situation in that region. Mr. Mealer, formerly 6KU, expects to have his station in operation February ist, and will run his set and 6EJ’s together, with Mr. Wise’s assistance. At present 6EJ is the only station operating in the valley doing any long distance work. 3. No success has attended efforts to to obtain a route north that divides the 600 mile jump, although a possibility has opened up in the station 6FE, in Shasta County, who seems to communicate with the 7 stations at times, and reports 6AE as “QSA”. However, he has not been operating long enough to have heard from him as to the possibilities. 4. At present there is a dearth of local stations in the cities. Most messages going to Oakland, Alameda, and Berkeley, are distributed by 6AN, while 6AM handles most of the San Francisco work, but as yet there are no well defined relay stations in these cities, although many stations at times help in relaying messages. 5. Routing of messages for most effi- cient transmission: All messages which require long distance transmission should be given to 6BR, 6AT, or 6AE. (a) All messages for bay regions should be given to anyone who can be raised in this region, but this will ordinarily consist of 6BR, 6AT, and ‘AE as mentioned be- fore. Ordinarily, messages should not be given 6EJ, as for some reason communi- cation as yet between him and the bay is slow and difficult. (b) All messages from the bay regions should be given these three stations direct- ly, if possible, and also before ten P. M., if they are on file at that time. Stations that cannot work these stations directly should have another station relay for them, preferably 6AN, 6FN, 6AM, etc. (c) Messages for Portland will be sent either directly to Portland by 6AT, 6BR, and 6AE, or will be sent by way of Reno, 6BQ, the latter route being usually slightly quicker, under present conditions. Mes- sages for points south and east are to be sent by way of Los Angeles, while those for the valley are sent to 6EJ or 6AK. il ie mathe tenn ste cnn A. ES i Itt

Page 35

ae a eee ot Ne ca ll March, 1920 6. Points for which messages are accepted: (a) All points around the bay, including San Jose, Napa, and San Rafael, including intermediate points. (b) Reno, Nevada. (c) Portland, Oregon, with messages to other parts of the northwest doubtful of transmission, but perhaps possible to some points, since 7YS is now on the job. (d) The following points in the Sacra- mento Valley, as reported by 6EJ: Sacra- mento, Isleton, Ryde, Courtland, and Wal- nut Grove, while not to Lodi, Davis, Stock- ton, Rio Vista, Folsom, Lockford, and Acampo, until] further notice. (e) Los Angeles, and vicinity, but not for San Diego, or Phoenix, Arizona. (f) Points east of the Rocky Mountains. Messages that come under this class will be slow in transmission, as they all have to go through 5ZA in New Mexico, and this long jump is not working too smoothly as yet. 7. In conclusion I wish to state that we have lost one good relay man in 6BA, who has moved, to Los Angeles, where he is in the radio manufacturing business with another amateur from his home town, and gained another, in ex-6SI, now 6FN, who for a time was Pacific Coast Manager, and is now back at Hayward, after some time in Seattle. ONTARIO DIVISION (Canada) A. H. K. Russell, Manager, 353 Markham St., Toronto, Ontario. Relay business is still very backward in this division, owing to the lack of high powered amateur stations in Southern Ontario, except in the immediate vicinity of Toronto. No regular communication has yet established with the other side of the border, though it is hoped that this may be achieved very shortly. The most news from Canadian amateurs comes in a rather unexpected communica- tion from the Naval Department, who advise all Canadian.“amateurs from the Gulf to the end of the Gosat Lakes are to be allowed to transmit with 200 meters wave length all during the Winter, until the opening of navigation in the spring. The Naval Department also says that this is in the nature of an experiment, and if there is no trouble from this extension there is a probability that 200 meters will be the permanent wave length for the Canadian Amateur as well as the American. This fact should stimulate long distance work by Canadian amateurs more than any- thing else. Before the war there were at least half a dozen Toronto amateurs who could be counted on to work Buffalo com- fortably in the day time, and that was in 1913. Judging by the receiving results of these same men now, the same work should be easy. QSsT 33 The Manager has been endeavoring to get a trunk line which will work around the shore of Lake Ontario and connect up with the American amateurs at Niagara Falls, N. Y., or Buffalo, but so far without success, principally owing to the backward state of the smaller Canadian towns in wireless matters, and partly to the fact that we have been unable as yet to get in touch with a good Buffalo station. The proposed route at present is from Toronto to Hamilton, then branching into two routes, one to St. Catharine’s or Niagara Falls, Ontario, and the other to Brantford, where there are several experienced men with good receiving gear; but as yet they have not been heard from in the sending end of the game. It is hoped that any amateur who has a good transmitter and who is situated either east or west of Toronto will write and let us know what he has, and how we may connect up with him. So far as the Toronto amateurs are con- cerned they are nearly all members of that very much alive orgaization, the Wireless Association of Ontario, now over eight years old, and a very flourishing club. The Association holds meetings every three weeks, generally in the Central Y.M.C.A. at Toronto. In concluding this, the first report from the Ontario Division, we wish to convey our 73’s to our cousins across the “line” and hope before the next report to be able to send them via radio. WEST GULF DIVISION, F. M. Corlett, Manager, 1101 East Eighth Street, Dallas, Texas. Traffic in this Division in most cases is getting thru OK. Line “F’’, Grand Forks, N. D. to Dallas, Texas, is working OK in this Division, connecting with the. Central Division via 9BT at Topeka, Kans. As QRM and QRN will no doubt be on the increase from now on we should have at least two stations in Oklahoma to shorten this jump and insure reliable communica- tion. Line “F” can now be extended on south to Houston, Texas, in fact traffic is being handled regularly from Dallas to - Houston via Waco, 5BG, and Austin, 5AS or 5BO. No appointments of traffic officers have been made this month. Mr. William Wol- over, 5DO, at Perry, Okla., is heard QSA in Dallas at times and so far is the only station in Oklahoma that Texas stations have been able to handle traffic with. As a gentle hint to the rest of the Oklahoma station owners—it is going to be a question of merit that will determine who our Oklahoma District Superintendent is to be. Therefore interested station owners are advised to get busy and handle traffic, and show what they can do.

Page 36

Arizor intendent homa is;

It is r has not that he h East an hasn’t h has been That how terested necting last new only a d was not Coast as west of graduall; as sumnr that is : fine our the habit worth f Our al of the N lively rey Mr. F

just as s cularly ir at Trinit W. E. Br Antonio Texas D Branch there as Butcher and is « teresting handling the pows municati Roswell, other po The W the front moment of Waco * Waco R interest Dist that rel carried parts of San Ant il Od ia uw Houston Houston impossib] Division

ary line \

one locat handling t Fuller of transmitt« will make with the | Southern |! thout a District Super- e reason that Okla- doesn’t seem to be any- who is capable of t Mr. Falconi’s report ed but it is supposed » busy trying to get the ists together that he for anything else. He ellent work out there. District we are all in- ms to be our only con- Pacific Coast. The vas via radio from 5ZA ro and at that time he ny traffic for the West k was rather uncertain Conditions will become rable for the long jumps nd QRN approach and on why we should con- short sure jumps. If formed it will prove its | relay work. t Superintendent White, xas District sends in a District. | and Mr. George W. Texas, will be with us r complete Thordarson White seems parti- . getting a station going ty at Waxahachie. Mr. * Ennis, has moved to San s where the Southern rains a good prospect. ised us a good station ssible. Asst. Dist. Supt. ville, is right on the job » good work, both in in- rs in the League and in Ty rié has recently increased \L and maintains com- lopeka, Kans., St. Louis, rt, La., and numerous <as Territory is coming to and let us pause here a Asst. Dist Supt. Harris, redit, as he organized the ib and otherwise created again. The Waco Club application for affiliation this week. itry of Houston reports in his District is bein essfully in practically al nee with the exception of h continues silent. Route well to 5ZA, via 5AC at nd 5BO at Austin. Both tin report that it is almost rk East to the East Gulf Some good stations in na near the Texas bound- this condition. A route QsT March, 1920

to Eagle Pass is complete except for San Antonio. The route now goes via Houston, Austin and Eagle Pass. We are glad to have our old timer Ed. Nettelton, 5ZN, formerly of Beeville, Texas, now located at Eagle Pass, Texas, with us again. Carl E. Noll of El Paso has installed a % K.W. set there. Just a word to you fellows right here that are located close to the Naval or Army stations; be sure of your wave length, and keep your decrement low and watch your step. Don’t give the Naval or Army stations a chance to complain of inter- ference. Just a few nights ago a Naval Gulf Coast station told a Fifth District station to get down on 200 meters or he would report him. Be sure that your station is on 200 meters and don’t wait for some Naval or Army station to tell you about it. CENTRAL DIVISION, R. H. G. Mathews, Manager, 1316 Carmen Ave., Chicago, Ill. Because of the failure of practically all the District Superintendents of the Central Division to make their reports covering the month of January, a long report for the Central Division in not practical. Attach- ed hereto, however is an interesting report from Mr. Larson, 9KG, District Superin- tendent of South Dakota: Mr. A. J. Ball, District Superintendent of Eastern Ohio reports that he has success- fully organized a daylight route through his territory, connecting with 8AA at Defiance. Since we are able to work with 8AA and 8ER in daylight we therefore have a route which is workable at all times a Chicago to the Western boundary of io. Mr. Larson and Mr. Ball have done some excellent work in their respective territor- ies and the former has had to work under the great disadvantage of a large territory with a comparatively smal] number of stations. The Routes in the Central Division have reached such a state of organization that regular message work is possible to practically all points of the Division, al- though the contemplated short distance daylight routes are not yet formed. Mr. Harold Larson, District Superin- tendent for South Dakota, writes that up to the present time there has been very little to report for the district of South Dakota. In fact the only stations or prospective stations within the district to inquire by letter regarding activities of the league or otherwise have been the following: Edward Isaac, Eureka, S. D.; Charles Norton, Sioux Falls, S. D.; and F. D. Steadman, Beresford, S. Dak. (Concluded on page 52)

Page 37

ee March, 1920 JOHN M. CLAYTON Here’s a fellow whose call we all know, old 5BV of pre-war days, 5AF since we re-opened, and now 5ZL—John M. Clayton, of Little Rock, Arkansas, Assistant Mana- ger of the East Gulf Division. Mr. Clayton was born in Little Rock in May, 1899. One of the most persistent hams in the 5th District, he had reached the stage of a full big quarter kilowatt in late 1914, and started 5BV with a “1” in 1916, doing splendid relay work on old trunk line E during 1916-17. When the gang quit for the Navy, he tried three times but was “too blind” and finally wound up at Cornell late in 1917 where he worked what was left of 8XU—a buzzer table full of punks. Going back to Ar- kansas in March, 1918, he became radio instructor for the University of Arkansas, until the S.A. T. C. broke out in the said school. Had the bad taste to try the (Concluded on page 45) GUY R. ENTWISTLE Mr. Entwistle, Assistant Manager of the Atlantic Division and in charge of the New England Section, is a man of many titles, being also President of the New England Amateur Wireless Assn. and QST’s business representative in Greater Boston. He was born pn Feb. 21, 1893 in Somer- ville, Mass., and got his electrica] engineer- ing education at Tufts College, where for two years he was president of the Tufts Wireless Society. His interest in radio dates from 1907, having started with a 15-foot aerial and the proverbial tuner back in the days of no books and no radio schools. Neighbor’s hen-coops and nearby billboards were raided for lumber for his first shack, where with his first call of EH he achieved a quarter-mile range and claims to have sat up twenty-four hours chewing the rag with another fellow, when he first connected up over this famous distance, (Concluded on page 38)

Page 38

the ma at a lem is spoker room voices istics, apparat render selectir In two m energy, This e1 magnet cult wi a state In ord to anot be ( place slide they as be | Ther the k dicates This separat the pr Bef 5 es up ef ~ Conducted by Guy R. Entwistle LOOSE COUPLER beginner has used his le tuner a while and a multitude of stations, to wonder whether there e easy way to weed out them and obtain but one some extent this is ac- lern practice. The prob- trying to pick out the yne person in a crowded veryone is talking. The differ in their character- signals coming in on our the proper design we can ng apparatus much more s receiving set we have ts. In the primary the accepted wave, oscillates. passed over by electro- yn into a secondary cir- detector converts it into t can affect the telephones. s energy from one circuit his, the two circuits must 3 POINTS 6 POsMTS

That is, they must be *h other. In our double- ng parts of the same coil, lose and we speak of them ELY COUPLED. ther style of tuner, called ler which, as its name in- s us to use “loose” coupling. providing a means of coils which form part of | secondary circuits. ribing such a tuner it is

important to understand a very important relation existing between the kind of coupling used and the character of the resulting wave on our instruments. At this early stage of the game we can not go too deeply into the reasons for things but will have to state certain facts helpful in the understanding of the various pieces of apparatus. Briefly, close coupling permits the transfer of energy from primary to secondary to occur very quickly and this has the very bad affect of producing “broad tuning’”’—the signals come in all over the tuner and one cannot be picked out from the others. This situation corresponds to con- ditions when using the double-slide tuner. On the other hand, if we have a means of loosening the coupling between the coils (that is, separating them from each other), we can vary the rate at which the energy is extracted from the primary by the secondary and will notice that the looser the coupling the “sharper” will be the tuning of any particular wave. This is because the energy is extracted more slowly. It is a little hard to understand but we may say that when the energy is & Pe@InTs

os \ | | rS) extracted more slowly, the primary gets to oscillate more times and so is able to more exactly define its frequency of vibration, and the result is that we are able to pick out one station from a maze if it has slightly different characteristics. Connect up in your mind this relation between the rate at which the energy is withdrawn and the resulting wave characteristic in the detector circuit. The same idea holds for transmitting and shows us why we should use loose coupling for sharp tunes. —=

eee PS ps pee ae

Page 39

a ee ES ee oe oe ry ae «le March, 1920 Boiled down to simple language, a loose coupler is a piece of apparatus having two coils whose number of turns can be varied but having no electrical connection with each other, and having a means of varying the distance between the coils by some convenient mechanical mounting. Each coil alone provides the necessary inductance for its own circuit, while the two together provide a means of transferring energy from one circuit to another. So much for theory. Regarding actual construction, the questions from most ama- teurs are what tubes to get, size of wire, number of turns, taps ete. The dimensions of any tuner depend on the range of wave lengths desired. We will confine ourselves to those between 150 and 3000 meters (Arlington’s wave is 2500 meters.) As- suming that the amateur has one 0.001 mfd. variable condenser for the secondary, in order to get a wave of 3000 meters we must have a total of 2,570,000 units of what is called Inductance. Our problem now is just what is the best way to wind our coils to obtain this. We will hold thruout to the following dimensions: Primary tube diameter, 4 inches Secondary tube diameter, 3% inches Wire for primary, No. 24 D.S.C. Wire for secondary, No. 28 S.C.C. The only remaining item is the length of winding, or the number of turns. It is found that four inches of winding will be sufficient for the secondary. The tube will have to be slightly longer, allowing say % inch space at each end. We will let the secondary dimensions govern the length of the primary, i.e., tut the two tubes the same length, 4% inches, and wind the primary for four inches. The following table gives the data for our secondary winding, of the dimensions given above, and with the variable con- denser across it,the maximum wave length being obtained when all the capacity is used and the minimum when the capacity is reduced to 0.0001 mfd., which would be 20 degrees on an ordinary 43-plate variable. Length of winding Turns QST Inductance 37 For the primary, altho a slider can be used we will describe one to be tapped in units and tens of turns, by which careful tuning of the primary circuit can be ob- tained. See Figure 6. Starting on that end of the winding which will be adjacent to the secondary, bring out a tap from every turn for the first ten turns, and then a tap every ten turns the rest of the wind- ing. There will be about 140 turns, with 10 for single taps, leaving 130, or 12 “tens” taps. Thus we will need 11 points on the unit switch and 13 on the tens switch, as FIG. 7 A 2 2d i == °° oo a till oo L “= /6” shown in the diagram, which will be under- stood with a little study. This makes it possible to get one-turn variation of the winding. Note how the increases of primary and secondary turns progress each from the adjacent edges of the coils. The ends and supports will be left to the taste of the constructor, but we show some ideas in Figure 7. The base may be about 16” long, with a square piece up- right on one end, to which should be screwed a circular disc of wood about 4%” thick and just small enough to go inside the primary. With glue and brads the primary may then be mounted and will be supported satisfactorily by just this one Maximum Minimum Inches in Cms. Wave Length Wave Length 4 216 2,570,000 3000 950 2 108 1,005,000 1900 600 1 54 348,000 1100 350 % 41 227,000 900 280 ly 27 121,600 600 200 From this table we can pick out ranges of wave length and dimensions of winding to correspond, can make a tuner for short waves, for long waves, or for both. The taps on the secondary can be determined by the table. Punch holes in your tube before beginning the winding, starting a quarter-inch from the end, at %”, %”, 1”, 2”, 3”, and 4”, giving six taps. end. The secondary should have wood ends, on one of tvhich the secondary switch is mounted. This coil should slide on two brass rods as shown. Do not attempt to make sliding contacts to the rods for the connections. Instead use a flexible double- lead of lamp-cord or phone-cord as shown. The primary may be housed in, but the (Concluded on next page) a

Page 40

In t in the not ex ready attent affiliat take desiral The legislat close ¢ drawil panel vert the t for | The For i to us¢ audio! by usiz er wit in De 8 SU conne to tl added organiz offic ais apparer! a certall is obt LIT March, 1920 THE AFFILIATED CLUB: oF r x is % — R.L. takes pleasure in the affiliation of the ,dditional societies: ey Radio Assn., Pawtucket, R. I. Radio Club, San Antonio, Texas. Assn., Duluth, Minn. lio Assn., Anderson, Ind. Radio Assn., Indianapolis. Assn., Kokomo, Ind. \mateur Radio Assn., Philadelphia. ppears an article on club hoped will be helpful of clubs where they do the conduct of clubs al- ! A. R.R.L. traffic are urged to give matter and invite the clubs, and to under- of new clubs where f national affiliation are |. We may have more -in fact it looks like will—and we will need And in our daily affairs NIOR OPERATOR i from page 37) simpler design where a od or fibre is mounted the primary and bears s well as binding-posts in depart from this data. ors he can and is advised on the secondary, as er when the wave length ng more wire rather than yndenser across a small- small antenna described ised with this coupler, it 001 mfd. condenser be he primary when tuning ives, and in series (with turns) for shorter waves. @ —'¥ “Give Wir.» Al Radio Club ‘ en | Arruuareo = wee =6AR-R-L: we can not successfully work our stations without complication in any community where there is more than one station, with- out that same quality of co-operation. The Secretary will be glad to hear from the officers of clubs on this subject. Now that A.R.R.L. activities have spread to Canada, this invitation expressly includes the Canadian clubs. The Ravenswood Radio Assn., 1917 War- ner., Avenue., Chicago, an organization originally composed purely of commercially licensed operators, has created a Junior Membership with reduced admission fee and dues—a step which will no doubt materially strengthen their club. This society is one of the foremost and stablest organizations in Chicago. Its Secretary, Mr. W. E. Wunderlick, will be pleased to hear from interested parties. The Secretary invites items of interest from the affiliated clubs. Information which will be of assistance in strengthen- ing organization, overcoming club prob- lems, and resulting in more complete harmony in local operating conditions is particularly desired, rather than the here- tofore customary notices of meetings, etc. Let us make the club news in QST some- thing more vital than mere “gossip.” Use as little capacity across the secondary as possible, especially when using an audion. C.W. reception next month. GUY R. ENTWISTLE (Concluded from page 35) until his batteries ran down. In 1909 he took a course in radio at the Bverett Evening School and taught there for six years following. He has operated on ship- board during summer vacations the last eight years and has covered 100,000 miles on everything from an ocean liner to a coal barge. His commercial experience also includes research work with the American Radio & Research Corpn., where he was later in charge of the testing laboratory. His present station is 1AL, located in Brookline.

Page 41

March, 1920 Our photograph illustrates the receiving set of Mr. Harry A. Mackley, Radio 9AJ, at Peoria, Ills., embodying a number of novel features, and from which we all can take suggestions. Note the mounting in a desk. What could be more convenient? The key is there, and the white push-buttons oper- ating the distant-control relay. The set can be locked up for protection from dust during the day, and the neatness of the installation and its total freedom from un- sightly wiring enable it to pass the censor- ship of a critical housekeeper and secure room in the house. Note the Audiotron as detector, and higher vacuum tubes for the three stages of amplification. The large separation be- tween units should prevent audio squealing between tubes. DeForest coils are used for receiving but a Paragon had just been received for installation when this picture was made. The transmitter is a hundred feet away, in the garage. No noise, no building fires. Just slide into your slippers, light your pipe, and sit in. Unfortunately the trans- mitter is so located that a photograph was not obtainable, but our diagram illustrates the hookup of the control apparatus in even better style. Briefly, it is a magnetic switch consisting of double iron plungers, working in both directions in double solenoids, operating on 220 v. A. C., which is controlled by the local battery and push- buttons. A magnetic key is also used, and thus there is no induction in the re- ceiving set. The control wires to the trans- mitter are in the form of a buried cable. The operation will be understood from a

Page 42

40 study mitting A to Er Vv. cir mitting iron | carry now at D, supply subje which operate operatior receiving ergized QsT March, 1920 Pushing the trans- current from Battery No. 3, closing the 220 lenoids on the trans- ind thus drawing the tion. These plungers with contacts which | to the transmitter to the solenoids on the receiving side, No. 2, pulling the plungers to the opposite side and connecting the aerial to the receiver at D and opening contacts B and C. 9AJ also has an experimental under- ground antenna running east and west, consisting of an extra wire in the buried cable for the distant control. Consider- soes o4—_+ enog We 4 et LS ee L in cS we: motor M at B, and transformer at C, »f the magnetic key, return is made to \ also. The reverse upon pushing the lay No. 1 being en- e the 220 v. current leans / FTE PECL/IVER able amplification is necessary, of course, but Mr. Mackley says it is justified, for atmospherics are reduced and interference from stations to the north and south is nil. Amateurs as far east as 1AW have been read on this underground antenna. An aerial of conventional design is used for regular work, however. These views are of Mr. Louis Falconi’s station at Roswell, N. M., now our most important link in transcontinental relaying. First acquiring fame under the call of LF, while awaiting his license, he has done very consistent work between Chicago, St. Louis, etc., and 6EA in Los Angeles and has been heard in many states. It is now operating under special license with the call 5ZA, and is one of those stations deserving a Z call. The transmitter is mounted on a shelf in the corner above the receiving appar- atus—an arrangement many amateurs find very convenient. Note especially the en- closed rotary with glass front, and the hinge-type oscillation transformer.

Page 43

March, 1920 5AC This is Mr. C. W. Vick, of 1918 Smith St., Houston, Texas, “CV” of pre-war days but now 5AC, at his station where he has recently done some remarkable and commendable work, both during the Gulf storm as recently mentioned in QST and with the NC-4 on her recent flight from New Orleans to Galveston. 5AC is heard regularly in Chicago, and the remarkable feature is that all this work has been done on a temporary single-wire aerial. CALLS HEARD Such a volume of “Calls Heard” is re- ported that we are obliged to ask your help in the following respects: (1) List the calls on a separate sheet of paper—do not embody them in a letter. (2) Arrange by districts from 1 to 9, and alphabetically thru each district; and run them across the page, not down a column. (3) Put parentheses around calls of stations also worked. (4) Omit initial or other unauthorized calls. HEARD AT 9EQ, ST. LOUIS, MO. 1AW, 1AG, 1AJ, 1IR, 2DA, 3BZ, 3NN, 4AA, 4AE, 4AG, 4BC, 5AA, 5AF, 5AG, 5AH, 5AI, 5AS, 5BK, 5BO, 5AL, 5AQ, 5LA, 5DO, 5ZA, 5ZS, 5LO, 5ZL, 8AA, 8AD, 8ADX, 8AM, 8BA, 8CB, 8CN, 8DM, 8DR, 8DW, 8EG, 8ER, 8EX, 8EZ, 8ES, 8GA, 8G5, 8GB, 8GN, 8IK, 8JZ, 8JQ, 8JJ, 8FP, 8HG, 8NF, SALE, 8ASF, 8LF, 8WZ, 9AA, 9AJ, 9AH, QAP, 9AU, 9AIK, 9AW, 9AD, SAG, SBT, 9BP, 9ADM, 9CS, 9CE, 9CF, 9CH, 9EE, 9EF, 9EG, 9ET, 9EX, 9EY, 9EP, 9GA, 9HR, 9HC, 9IT, 9FI, 9J0, 9JT, 9JW, 9KF, 9LN, 9NE, 9VY, 9MK, 9ZN, 9WU, 9XR, 9GX, 9I1G, 9YL. HEARD AT 5AA, NEW ORLEANS. 1AW, 2BZ, 2DA, 2IN, 2ZM, 2ZS, 3AN, 3BZ, 4AA, 4BC, 5AB, 5AC, 5AU, 5AF, 5AG, 5BB, 5BK, 5BO, S5BY, 8AA, 8AMN, 8BT, 8CC, 8CD, 8DA, 8EC, 8ER, 8EZ, 8EF, 8EX, 8FP, 8NF, 8RQ, 8JZ, 9AD, 9AH, 9AJ, 9AP, 9AU, 9AW, OBR, SBT, 9CS, 9JW, 9MK, 9PF, 9PO, 9VP, 9VY, 9WJ, 9WQ, 9WW, 9BY. HEARD AT 9AU, CHICAGO. 1AW, 2BM, 2ZL, 2ZS, 5AC, 5AF, 5AL, 5BO, 5ZL, 8AA, 8AE, 8AH, 8CB, 8CC, 8CF, 8ER, 8DA, 8JJ, 8JQ, 8NF, 9AJ, 9AK, 9AP, 9BR, 9BT, 9CA, 9CW, 9CS, 9EG, 9GS, 9HD, 9HG, 9HN, 9HS, 9HT, 9IP, 9IT, 9JT, 9NE, 9PF, 9PQ, 9VP, SYA.

Page 44

QsT March, 1920 HARTFORD, CONN. HEARD BY 6BS, SAN FRANCISCO Jan 6th to Feb. 5th. 5EM, 6AT, 6BR, 6BQ, 6CS, 6EB, 6EA, 6EJ, 6FF, LAY), (LANW), (1AZ), 6TX, 7CH, 7ZB. LEN, 1EK, (1FQ), 1GJ, ee ‘), (AKT), IMP, 1NO, HEARD AT 3NB, M. FRYE, VINELAND, N. J. (1RN), IRV, (18Z), 1AE, (1AW), 1CM, IDL, (1KT), 1PG, (1PY), ‘K), 2BK, 2BM, 2BT, (2BM), (2CS), (2DA), (2FG), (2GR), . V, 2CY, (2DA), 2DV, 2FG, (2JU), 2KM, 2RG, 2SH, 2SL, 2TX, (2ZM), E), (2JU), 2JV, (2KN), 3BZ, 3GO, 3ZS, 8ZW, 3ZX, 5AF, (8AA), (2SH), (2ZL), (2ZM), (8AK), (8AKM), (SAKY), 8AOM, (SAY), :CC), 8CV, 8EZ, 38GO, 8SCB, (8CC), (8DA), (SDV), 8DW, (8ER), (8FD), NN, 3WA, (3ZW), 4AE, 8GB, 8HG, 8IB, (8JQ), 8KP, 8LW, 8MZ, 2AKY, 8AGO, 8AUX, 8BD, 8XU, (ex-8ZW), 9AP, 9EG, (FH), (9HD), (9IT), DY. &8DE, 8DG, 8DW, 8EC, 9KG, 9KV, 9LQ, 9YA, (9ZN). SEV, 8FF, 8FK, 8FH, ae ag eree SHI, 8HF, 8HM, (S8IB), HEARD AT 3EN, NORFOLK, VA. IQ), 8JJ, 8LH, 8LS, 8LJ, 1AW, 2DA, 2JE, 2JU, 2LM, 2L0O, 2ZM, 2ZS, RR. 9CC, (9CW), 9DQ, 3BZ, 3CC, 3NB, 3NC, 3NN, 3QM, 4BC, 5DA, HD). 9HN. 9HR, 9HY, 8EF, 8ER, 8JQ, 9EN, 9HD, 9ZN. 9KO, 9LQ, (9NL), 9VP, a . HEARD AT 5BC, NEW ORLEANS : 1AW, 2IR, 2ZS8, 3BZ, 4BC, 5AC, 5ZL, 8AA, . 8CB, 8DA, 8ER, 8EZ, 8HO, 9AF, 9AU, 9BR, ZC, DALLAS, ee anc 9CR, 9DC, 9EZ, 9FO, 9HS, 9MK, 9XS, anuary. ouy, . , _—__ AL, »AO, SAP, 5AO, 5AU, ADDITIONAL CALLS HEARD AT BM, 5BO, 5BG, 5BJ, 5BK, CANADIAN 3AB, TORONTO 5ZL, 61Z calling 2ZM, 5ZC, 8AV, 8CB, 8DR, 8EN, 8GB, 8HA, 8HG, svt. em soe. SJ, 839. SMS, 8NF, 9ER, 9HA, 9HD, 9KF, 9KO, A, 9AJ, 9AK, 9AP, 9LQ, 9ZN. 9CJ, 9CN, 9CS, 9CW, - semaines time, 9EQ, 9EX, HEARD AT 8DA, SALEM, OHIO 9GA, 9GR, 9GS, (1AW), 1BG, 1KT, 1PM, IRN, 2BM, (2CS), (2CC), , 9IB, 9IK, 9IT, (2DA), 2FG, 2GO, (2IR), daylight), (2JZ), (2KX), 9KR, 9KT, 9KU, 210, (25U), (2PL), 2GR, (2XG, phone and ew , 9LQ, 9NE, ONY, set), (2YM), (2ZM), (2ZL), (2ZS), (2ZV), 3AN, , 9YJ, 9ZN, 9ZS, (3BZ), (38CC), (8CH), 8DZ, 3EN, 3JM, 3NC, (83NB), (3ZS), 4AE, (4AG), 5AF, 5AL, (5BV), a 5ZL, 8JJ, (8CB), (8CC), (8ER), SASF, 8FI, » ¢ . (SNF), (8MC), 8XU, 8XA, 8BP, (9ADL), (9AU), B, ST. anes, Cae 9AD, 9AP, 9AJ, 9AK, 9BM, (9BT), 9CA, 9CS, 9CN, iDL. 1KT. (1RN), 2BM (9CW), 9DF, 9DC, 9DT, 9DX, OEE, OEG, SEY, DS. 2EH. (2FG). (2TR). 9FP, 9FA, 9FC, 9HA, 9HD, 9HN, 9HR, 9HS, 9HT, XG). 29YH 2ZH. #ZL. 9Il, _ (8X), (9IT), (9KV), 9KF, 9KO, (9NT), CC. 3CH (3CV). 3EZ,. (9LC), 9LP, 9OY, 9PF, 9PQ, 9RD, (9VP), (9ZN), ZS. ex-3AMO, (4AE). (9BR). Also work regularly UM, Mr. Carter, ‘EJ. 5AC. 5AD, 5AE. Cleveland on his CW set, one bulb using 20 watts. BG. SRO. iSBZ). 5DA. Distance 60 miles. Z 5ZC 5ZL), 5Z5 oo » Eee ee, Oe’ Ga REPORTED BY 3BZ, DANVILLE, VA., CC), &CE. 8CJ aco. 8CP. during January. (1AW), 1AE, (1CM), I1KT, (3DW). (SEC), (SEF), (1RN), 12M, 2AR, (2BB), 2BG, 2BZ, 2BM, 2CB, H. &FL 8FO, SER. sFs. 2° H. 2CS, (2DA), (2TR), (2JE), 2JU, 2LK, 2L0, N. 8GS. 8GW,. 8HA, 8HF. 2PL, (2SH), 2ZM, 2ZS, 2XG, (3AA), 3AMO, SIK). SIN. (8JJ), 8JN. (3CC), (3CE), (3FG), (3GO), (3GX), (3NB), & SMF, (8XA), (ex-9ABD) 8LW, 3XC, 4AE, 4AN, 4AT, 4BC, 4GX, 5AL, ex-9AOR. 9AP. (9AU). (5DA), 5EX, 5ZC, (8ALE), (8AA), 8AB, 8AF, .BP. (9BR). (9BT), 9BW (SASF ), SAE, 8AH, SAPU, 8AO, 8AUM, SAL, 8BR, (9GN). 9CR. 9Cs. (9cw),. SBP, 8CC, 8CB, (8DR), (8DW), (SDA), 8DD, 8D4J, EC). 9EE, 9EQ, 9ER 9EV. 8DY, 8DE, (SEF), 8EN, (8ER), 8EG, 8EC, 8EZ, (SEC), — + +4 OFZ’ SEQ, 8FD, SFG, SFP, SFA, 8FO, 8FH, 8FI, 8FW, 9GW. 9GX. 9HA 9TIL 8GA, 8GH, 8GR, 8GN, 8GH, 8HD, 8IX, 8IQ, (SIF), oHW. 9IL. oLJ ” (9IR) (SIL), 8IB, (8JQ), 8JY, 8KG, 8LN, 8LL, 8LH, OKF. 9KL ‘OKO. (9KV). 8 LQ, 8MB, 8NL, 8RS, (9AJ), 9AD, 9AU, 9BR, ‘ME. (9MK). 90B, 9PQ, %BA. 9CJ, 9CC, (9CS), 9EM, 9EG, 9ER, 9ET, 9EQ, 9QT), 9RO, (9ZC) "(9ZJ) SEE, 9FD, 9FK, 9FM, 9FU, 9GS, 9GC, 9GX, 9GS, » Ta , ; (9HD), (HA), 9HP, 9HB, 9HR, 9HS, 9HN, (9HJ), 9HI, 9IT, 9IJ, 9IX, OI, 9JT, 9KF, (9KV)_ 9LA, 9L 9sMC ZN. 1AR, BELMONT, MASS. a ciieitiediincall A, 2DI, 2JU, 2ZS, 3BZ, 3CH, HEARD AT 6EA, LOS ANGELES, CALIF. As, 8AD, 8AE, 8CB, 8CC, (5ZA), (6AE), (6AK), 6AL, 6AM, (6AT), (6BJ), SER, SHF, 8HG, 8IL, (6BQ), 6BR, (6BZ), 6CI, 6CL, (6CO), 6CP, 6CQ, 8ASF, 9EP, 9HD. (6c), 6DK, (6EJ), 6FE, 6GL, (ex-6KL), (7DK), 7ZB). sFC, ROCHESTER, N. Y. ' tatoos IDL, 1RN, 2BM, 2CB, 2CR, SO RN OOM, ee ce 6S ss Ss«HEARD AT 6EB, LOS ANGELES GO. 3NB 3NC 8ZM 4AE. (5ZA). (6AE), ex-6AL, 6AM, GAT. 6BA. 6BB, eAK. &BV. 8CB. 8CD. SCH BJ, (6BQ), 6BR, 6BZ, 6CE, 6CI, 6CL, 6CO, 6CQ, DV SEC, SED, SEF, 8EG, °CS, 6DK, 6DY, (6EJ), 6FE, 6GQ, 6GL, ex-6RN, SFO, 8FR, 8GA, 8GE, sGq, ‘728), 7CR, 7DK. SIL, 810, 8IQ, SIX, 8JJ, , sNO, 8RS, 8XA. 8ADX, HEARD AT 9PI, EUREKA, SO. DAKOTA )AH. 9AJ. 9AK, 9AP, 9AU, 5AC, 5AF, 5AL, 5AY, 5CD, 5DO, 5EH, 5EX, 5MH, IDL. 9EG..9ER, 9EV, 9FD, 5YA, (5ZA), 5ZC, 6AL, 8AA, 8AK, 8BO, 8BP, 8CB, HP, 9JE, 9JW, 9KF, 9KO, SDA, SER, 8EX, 8FA, 8FI, 8GQ, 8HG, 8JQ, 8NF, 9VD, 9VP, 9VY, 9YA, 9ZL, 8XA, 9ABD, 9AHW, 9AJ, 9AK, 9AO, 9AOR, 9ASP, 9AU, 9BP, 9BR, SBT, 9BU, 9BY, 9CA, (9CN),

Page 45

March, 1920 9CK, 9CL, 9CO, 9CR, 9CS, 9CW, 9DC, 9DE, (9DH), 9DR, 9DT, 9DU, 9DV, 9DX, 9EA, 9EB, (9EE, 120 miles, using Ford spark coil), 9EG, 9ER, 9ET, 9EX, (9EY), 9FA, 9FB, (9FI), 9FL, 9FM, 9FN, OFP, 9FR, 9FT, 9FU, 9FW, 9FZ, 9GC, 9GK, 9GS5, (9GT, 180 miles, using 2” spark coil), 9GV, 9HA, 9HD, 9HN, 9HS, 9HT, 9HU, (9IF), 91J, SIT, 9IX, 9JB, 9JD, (9JE), 9JW, 9KF, (9KI), 9KT, 9KV, 9LC, 9LN, 9LP, 9LQ, 9MK, 9NT, 9OB, 90G, (90T), 9PF, 9PQ, 9VF,. 9VT, 9WH, 9WU, 9XT, (9YA), (9YB), 9YI, 9YV, 9ZC, 9ZL, 9ZN, 9ZT. HEARD AT STATION 3AI, PHILADELPHIA, PA., during the month of January. 1AW, 10W, IRN, 2BM, 2CS, 2FG, 2IR, 2PB, 2RO, 2XG, 2YH, 2YM, 2ZH, 2ZM, 2ZS, 3BZ, 3DH, 3ZW, 4AE, 8AG, 9AR, SBP, 8CB, 8DA, 8DW, 8DV, 8ER, 8ES, 8GC, 8JQ, 8XA, 8XE, 9AJ, 9FH, 9HJ, 9ZN. HEARD AT 7YS, LACEY, WASH. 6AT, 6BA, 6BR, 6CL, 6CO, 6CP, 6CS, 6DK, 6EJ, 6FE, ex-6RK, ex-6RN, 7AR, 7BK, 7BP, 7CH, 7CR, 7CW, and 7DE. Worked 6BQ, 7AK, TAN, 7BA, 7CE, 7BC, 7CB, 7ZB. HEARD AT 7ZB, PORTLAND, OREG. 6ACC, 6AE, 6AG, 6AJ, 6AN, GAT, 6BA, 6BB, 6BR, 6CO, 6EA, 6EB, 6EJ, 6FE, 6KL, 6RN, 6DY, (JN), 6UD, 6CI, 6BX, 6AM, 6VS, 6DK, 7AD, 7AK, 7CC, 7CE, 7CW, 7CH, 7BF, 7DJ, (JBM), 7YS. Worked 6AE, 6AT, 6BQ, 6EA, 6TX, 7AD, 7AK, 7YS, 7CW, 7CH, and (JN). HEARD AT 7CH, BOISE, IDAHO 6BP, 6AT, 6AR, 6QQ, 6AZ, 6XW, 6EA, 6AG, 6AX, 6AJ, 6SX, 6AU, 6AN, 6TX, 6CO, 6DR, 6AM, 6EJ, 6BO, 61Z, 6CQ, 5ZA, 7GR, TYS, 7RB, TAD, (LY), (CA), 6FH, 6EB, 6AL, 6FE, 7BQ, 6BT, 7CC. 6AE, 6EA, 7BC, 7AD, and 6AA, 6BQ, 6TX, 6CS, 7ZH, 6EJ, 6WR, 6CE, 6AE, 7ZB, (JN), 6BA, 6AC, 6CC, (PNB), 9WH, 7DK, 6UD, HEARD AT 6DH, FRESNO, CALIF. 6EJ, 6AB, 6YA, 6FE, 6BS, 6HH, 61H, 6BH, 6BR, 6ER, 6ED, 6AC, 6AD, 6VC, 6EB, 6EA, 7ZB, 7CH, 5ZA, 6BQ, and 6AE. HEARD AT 6AE, STANFORD UNIVERSITY, CALIF. 6AY, GEL, 6ER, and (CA). Worked 6BQ, 6EA, 6EB, 6FE, 6MG, 6TX, 6UD, (PZ), TDK, and 7ZB. HEARD AT 6CS, FRESNO, CALIF. 6ER, and worked 6BQ, 6EA, 5ZA, 7ZB, also exchanged signals with 7YS. HEARD AT 6DK, FRESNO, CALIF. 6EA, 6EB, 6EJ, 6TX, and 7ZB HEARD AT 9CS, CLINTON, IOWA 2ZS, 4AE, 5ZC, 5BO, 5ZA, 5DO, 5BK, 5AC, 5AL, 8DO, 8IK, 9JQ, 8AB, 8HG, ex-8XA, 8DA, 8FH, SAA, 9EX, 9KV, 9HJ, 9LH, 9EZ, 9AV, 9HW, 9CW, 9ST, 9LM, 9HT, 9IT, 9EE, 9GK, 9AT, 9DH, 9GX, ex-9AOR, 9NV, 9LC, 9AU, 9NO, 9AK, 9HI, 9GS, 9DU, 9OL HEARD AT 2FG, ALBANY, N. Y. 1AL, 1RN, 1SZ, 2AR, 2AS, 2BB, (2BM), 2CC, (2DA), (2EH), (2IR), (2JU), 2KM, 2LE, 2LN, 2LP, 2PH, 2XG, (2ZS), 3BC, 3BP, 3CV, 3ZS, 3ZW, 4CH, 8AA, 8AD, 8ADX, 8AH, 8AK, 8ALE, 8ARJ, 8BV, 8CB, (8CH), (8CC), 8DA, 8DE,- (SER), 8FV, 8GK, 8HD, 8HG, 8JJ, (8JQ), 9RS, 9AJ, 9AU, 9BG, 9EG, 9HN, 9KF, 9RT, 9ZN. HEARD ABOARD S. S. COSKATO, ANCHORED NEW YORK HARBOR, by E. Frey ex-3JQ. 2JZ, 2WB, 2AV, 3CV, 1AW, 1KJ. HEARD AT 9EY, OELWEIN, IOWA 1AW, 2ZS, 4AE, 5AL, 5AM, 5AS, 5DO, 5ZA, 8AK, (8CB), 8CC, 8DA, 8ER, 8FI, 8FP, 8HP, 8IB, 8IK, 8IX, 8JQ, (8JJ), (SNF), 8XA, (9AOB), 9BT, 9CA, 9CH. (9CW), (9DR), 9DV, 9DX, 9EE, 9EG, 9ER, (9EX), 9FG, (9FU). 9GK, 9GV, 9GX, 9HA, 9HN, 9HP, 9HD, 9HR, 9HW, YIP, 9IT, 9JE, 9JQ, 9JT, 9KO, 9KV, (9LC), 9LO, 9LQ, 9LR, 9ST. QsT 43 HEARD AT 4AI, ATLANTA, GA. 2ZS, 3AMG, 3GO, 4AN, 4AT, 5AC, 5AF, 5AL, 8AE, SAL, 8AS, 8CC, 8DA, 8DO, 8ER, 8FA, 8FD, 8FN, 8FP, 8FS, 8JQ, 8NF, 8ZM, 9AR, 9AJ, 9AU, 9AW, 9ABD, 9BA, 9BR, 9CW, 9DF, 9DO, 9DR, 9EG, 9EJ, 9EY, 9FD, 9FU, 9GS, 9HN, 9JQ, 9VY. HEARD BY JOHN L. GATES, CINCINNATI 2CB, 2XG, 5ZA, 5ZC, 8JQ, 8EN, 8HU, 8IA, 8IE, 8NR, 8HU, 9DG, 91J, 9KO, 9HU, 9GQ, 9IR, 9HN. HEARD AT CANADIAN 3Z, FARNHAM, QUE., (Eric W. Farmer, Box 403). 1AW, 1SZ, 2AW, 2DA, 2SH, 2ZM, 2ZS, 8CD, 8CF, 8ER, 8MP. HEARD AT 9KV, ST. LOUIS, MO. 1AW, 2CS, 2NB, (2ZS), 8BZ, (4AG), 5AA, 5AB, 5AC, (5AF), (5AG), (5AL), 5AQ, (5AU), 52ZC, 6EA, (8AA), (8AB), (8DW), (8ER), (8FI), (8HG), (8IK), (8JJ), (8JQ), (8VP), 8XA, 9AD, 9AH, 9AR, (9AU), 9BG, (9BT), (9CA), (9EE), (9HQ), (9IT), OIF, (9JT), (9KX), (9ZN). HEARD AT 9EE (ex-LXA), VALLEY CITY, NO. DAK. 2ZM, 6AA, 5AL, 5BG, 5DO, (5ZA), 5ZC, 5ZL, 8AA, 8AB, 8BP, 8CB, 8DA, 8ER, 8FM, 8FI, (8GQ), 8GW, 8HG, 8HR, 8IK, 8JJ, 8RS, 8SM, 8XA, 9ARD, 9AD, 9AJ, 9AK, 9AM, 9AOB, 9AOR, 9AP, 9ASF, 9AU, 9AV, (9BR, 9BT, 9BW, 9CA, 9CE, 9CG, 9CK, (9CS), 9CW, 9DA, (9DH), 9DR, 9DT, 9DU, (9DV), 9DX, 9EA, 9EO, 9ER, 9EX, 9EY, 9FA, 9FC, 9FI, 9FL, 9FM, 9FQ, 9FR, OFS, 9FT, 9FZ, 9GC, 9GN, 9GQ, 9GR, 9GS, 9GV, 9HA, 9HD, 9HG, 9HJ, 9HK, 9HN, 9HT, 9HU, QSIF, SII, 9IK, 9IT, (9IX), 9JA, 9JB, (9JE), 9KF, (9KI), 9KU, 9KV, 9LC, 9PQ, 9SK, 9TA, 9WH, 9WJ, 9YA, 9YN, 9YV, (9ZN). HEARD AT 9KG, VIBORG, S. D. 5BG, 5DO, 5HN, 5LA, 5ZA, 6ZN_ 8ER, 9AJ, 9AK, 9CH, 9EE, 9EK, 9FR, 9GK, 9HJ, 9HN, 9IF, 9IX, 9JE, 9KI, 9KU_ 9KV. HEARD AT 3ZS, ST. DAVID’S, PA. 1AW (regularly), 1AZ, 1CM, 1KT, 2BM, 2BK, 2CT, 2DA, 2IR, 2JU, 2LO? 2ZM_ 2ZS, 3BZ, 3KE, 3NB, SAA, SAKY, 8ASD, 8CB, 8CC, 8CH, 8DA, 8DW, SEF, 8ER, 8GA, 8IB_ 8IK, 8JQ, 8NO, 9AJ, 9CW, 9EG, 9HA, 9HN, SIT, 9KF, 9QH, 9VY, 9ZJ, 9ZN. HEARD BY SAS, TILLEY, AUSTIN, TEX. 5AA, (5AL)_ (5AC), (5CD), (5ZA), 5BZ, (5ZC), (5BG), 5DO, (5ZL), (5ZN), 5BT, (5AG), (5YA), 8GQ, 8ER, 8HB, 8AA, 61Z, (9HT), 9AJ, 9BR_ 9FA, 9GR, 9GO, 9HB, 9JB, 9FL, (9AOB), 9ZN, (9BT). (9JE), 9IT, 9KV, 9GL, 9AHI, 9EX, 9HR, 9HN, 9AP, (9HS) 9FU, 9IN, 9AK, 9CA, 9IX, 9GY, 9LC, 9DF, 9BG, (9EL). Can hear 9ZN and FH in the aren 4 of the day loud enuf to copy without trouble. HEARD BY L. P. WOOD Brantford, Ont., Canada, 100 miles northwest of Buffalo. 1AE, 1AK, 1AW, 2BB, 2JU, 2ZS, 8CB, SDA, SER 8IL, 8XA, 8gU, 9AJ, 9CW, 9LQ, 9ZN. REPORT FROM 4AG, ATHENS, GA. 2AW, 2JU, 2ZM, 2DA, 2CS, 2BM, 3NB, 3BZ, 3CH, 3AMO, 3GO, (4AN), 4ET, (4AE). 4AT, (5AF), 5AC, 5BG, 5DO, 5ZL, 5DO, 5BB, (5EX), 5BZ, 8LQ, 8ADX, (8JQ), 8FT, 8AA. 8JZ, 8ER, 8FR, 8AUM, 8EX, 8FP, 8AH, 8DA, 8EX, 8FS, 8EN, SAAR, 8I1Q, 8EC, 8IX, 8JJ. 8ASF, 8CB, 8IB, 8FI., 9CW, 9HJ, 9CS, (9KV), 9AG, 9PO, 9HN, 9AP, 9AJ, 9AU, (9BR), 9CB, 9ZN. (9BT), 9VP, (9GS), 9FU, 9ER, 9HH, 9GY, 9KF, 9IT, 9HD, 9GX, 9FD, 9KO HEARD AT SFM, COLLEGEVILLE, MINN. 5BT, 5DO_. 7KN, 8DA, 8JJ, 9AJ, 9AP, 9CN, 9CS, 9DK, 9DS, 9DU, 9EL, 9EO, 9FA, 9FU, 9FZ, 9GK, 9GS, 9HI, 9HW, 9KI, 9KV, 9LN, 9LO_ 9PI, 9ZC, 9ZA, 9ZJ, 9ZL, 9ZN. HEARD AT SEL, COUNCIL GROVE, KANSAS 5AC, 5AG, 5AL, 5AS, 5BT. 5DO, 8ER, 9AK, 9AL, 9BR, 9NE, 9NO, 9HI, 9HT, 9JE, 9LC, 9ZN. (Concluded on page 45)

Page 46

RR.L. letter-head will be | t a price everyone intil then, you chaps We |} e it next month. Hear O is an ex-amateur, now a ship i his identity must re- main ut ’s had a lot of fun hammir n the coast, and some remark have been covered with ¥ | amateur stations. While | ff the south-east end of Cuba, was had over the follow T IB miles “e 6 [ai ~ 7 5 “ these distances can r work. The remark- ) says his input during 0 w&tts. - a home-made adapter bs, contributed by Mr. ——N LNo1NG POSTS n “~ SthRD RYBPER DIAMETER To FUT SNUG IN Soc«a F- "VO PLACES St THAT THEY NGS MW SOCKET. BORE S LECT WOT LAO PalTs f St. Joseph Mo. The planatory. drawing March, 1920 Cs Did you ever hear of an oscillating crystal? Mr. G. W. Pickard, of the Wire- has done it, The secret is the less Specialty Apparatus Co., and here’s the hook-up. POTENTIOMETER “ nine volts at the potentiometer. CW is received by heterodyne beats in the usual manner. The Editor would like to know what results are had with this hookup. Some operators have the bad habit of “coming back” at a station calling them and shooting a message without finding out whether their own signals are loud enough to copy. This makes untold confusion. Messages should not be transmitted without a GA from the listening station, and it would be well to inquire first QRK? Repeating words when the other fellow tells you your signals swing is worse than useless. If he says you are too fast, slow down; if he says QRM, QTA for him; if he says QRN, then to QSZ is very desirable; but if the trouble is fading and nothing more, try it again the same as the first transmission. Nothing is so exasperating as to tell a fader to QTA and have him consume priceless time while his sigs are “in” in calling and repeating each word, only to fade out again when he did before, when if only he’d gone ahead in proper style you’d have had it. It’s no crime to ask for QRS. If a man comes at you too fast, tell him that rather than trying to guess at the message. We have some “Lake Erie swings” in our midst, too, who can’t be read until they drop

Page 47

nie ek ee) March, 1920 down to so low a cadence that it just naturally can’t be jazzed. So ask ’em. George Howsare, of 8EZ, old 8ASG, Dayton, Ohio, died on December 30th at the home of his parents, Rev. and Mrs. McD. Howsare, after a week’s illness of bronchial pneumonia. He had been attend- ing college at Defiance where he was the operator at Defiance College Station, DC, late 8GQ, and was home for the holidays at the time of his death. As 8ASG he acquired many friends among the A.R.R.L. fraternity, with whom he was an active worker, and we will all miss his spark. Our sincere sympathies are extended his parents in the loss which is ours as much as theirs. A number of new publications have appeared in the radio field. The “Radio Review,” published in London by the Wire- less Press under the editorship of Prof. G. W. O. Howe, is a highly technical monthly dealing mostly with the work of leading British physicists but containing reviews and abstracts of all advanced radio work, covering in general about the same ground as our own Proceedings of Institute of Radio Engineers. The advanced student will find it of considerable interest. Rupert Stanley’s book known as the “Text Book on Wireless Telegraphy,” pub- lished in England, has been revised and republished in two volumes. Volume II, entitled “Valves and Valve Apparatus”, is a splendid exposition of modern practice in the use of vacuum tubes, theoretically and practically, as detectors, amplifiers and oscillators. It deals largely with the work of Round, Ferrie, and other British and French experts in their wartime develop- ments, and presents many features new to American readers. The best theoretical radio text we have seen for a long time in “Radio Engineering Principles,” by Lauer and Brown, formerly Signal Corps officers, and published by McGraw-Hill. This book completely covers the American developments in radio com- munication made during the war, and in a lucid manner. QST readers will find it of much value in gaining an understanding of the electrical design of modern apparatus. QST Book Dept. has it, at $3.50, p.p. See this tiny tuner? It is only five inches in diameter, yet it tunes to 20,000 meters with a couple of shunt vari- ables. This is the big Tresco tuner, one of which we have been using thru the _ kind- ness of Mr. Kirwan. It has two involute-wound coils, with five taps on each, and the circuit QsT 45 is the ordinary straight audion with an additional variable from plate to antenna connection to produce the local oscillations. LCM, POZ, GB, IDO, OUI, MUU, NBA, NPL, XDA, and the eastern U.S. arcs have been heard, and tho perhaps not as loud as on more complicated sets, the Tresco tuner certainly has the advantages of com- pactness, ease of manipulation, and low cost. Erratum: Mr. Brown reports an error in the hookup shown on page 30 of the December QST, wherein the A battery is _|. JIS 13 THE SECRET ~ = /T INCREASES JIGS. ” JEN FOLD AND THE — C.wW.comME inBY = TWE DOZENS shorted thru the phones and secondary. It should be as in the drawing herewith. JOHN M. CLAYTON (Concluded from page 35) S. A. T. C. and got in, and then sat around until December praying to be transferred to a radio outfit. Favorite pastime: blowing condensers; next favorite, fixing them. When he dies he hopes to have engrossed on his tombstone “Here lies a ham—he did and died.” CALLS HEARD (Concluded from page 43) HEARD AT 8AA, DEFIANCE, O. 1AE, (1AW), 1RN, 1SZ, (2BM), 2BZ, 2CB_ 2CS, (2DA), 2FG, 21R, 2JE, (2JU), 2LO, 2PL, 2SH, 2SZ. 2WB (2ZS), (3BZ), 3CC, (3CH), 3GO, 3ZS, 3ZW. 4AI, 4AN, 5AA, 5AG, 5AL, 5BC, 5BE (5BO), 5BR, 5BZ, 5DO, 5EX, 50U, 5ZA, 5ZL, 5ZC_ 5XA, 8AVD, 8AKY, 8AB, 8AD, 8AE, 8AN, 8AL, 8BO, 8CB, (8CC) 8CJ, 8DA,. 8DB, 8DE, 8DR, 8DW, (8EC), 8EF, (8EN), 8EV, 8EZ, 8FA, (8FI), 8FT, SFH, 8FD, 8GZ, 8GI, 8HB, 8HG, 8HR, 8GJ, (8IB), SIF, SIK, 8JB, (8JJ), 8JQ, 8JV, 8KK, 8KW, (SNF), 8NG, 8NL, 8RS, 8US, 9AOB, 9AOR, 9AD, 9AF, (9AJ), 9AS, (9AU), 9BM, 9BP, 9BR, (9BT), 9BW. 9CA, 9CH, 9CS, 9CW, (9DU), 9EG, 9EL, 9EX, 9EV, SEY, 9FE, 9FG. 9FM, 9FR, (9FU), (9GC), 9GS, 9GV, 9HI, 9HN, 9HR, SHY, QIF, (9IT), 9IX, (9JT), 9KI, (9KF), (9KM), 9KO, (9KV), (9LC), (9LQ), 9LR, 9MK, 9NE, (9NQ), 90G, 90V, 9OY, 9PQ, (9ZN). HEARD AT 8EU, TOLEDO. OHIO 2PL, 3NB, 4AE, 5AF, 5ZL, 8AO, 8BR, 8BS, 8DA, SDC, 8DO, 8EF, 8FB, 8GJ, 8GK_ 8GH, 8GR, 8GX, SHI, 8IN, 9AD, 9AF, 9AJ, 9AO0, 9BR, 9BT, 9BU, 9CS, 9DU_ 9EG, 9ER, 9FD, 9FC, 9FU, 9GH, 9HA, 9KF, 9LC, 9LQ, 9LR, 9LN, 9PQ, 9ZN.

Page 48

QsT March, 1920 ‘0 Communieations _ oy the cAmateurs—_ QSsT ASSUME NO RESPONSIBILITY FOR THE EIN BY CORRESPONDENTS ® . e NG S Dear Mr: Have time to an Fr per Cana way offer fron are f read) betw Divis It obsta Pe r Inter the sar hood TI ‘anal year We |} Milett pron miles amats miles I find 1 been ferenc: has n meter We amate 2ZS8 we oft W The meters are ol calling very espec work car country F Nov ACCOUNT OF THE IN QUEBEC 243 Mackay St., Montreal, Que., Jan. 15, 1920. handicapped for no definite attempt 13th before. [ wish to extend my the thanks of many for the truly splendid nd the AR.R.L. have ng hand.” Judging n the subject, you rht course. There al- a little competition Division and this in the limelight.” vill serve to overcome f closer co-operation. er the A.R.RL. an what eur Brotherhood, much other joint brother- ni progressing remarkably to make up for five r radio development. tations already, Mr. (2AI), being the most gs reported QSA 60 worked with another Rivers, a distance of 85 I might add here that mateurs are and have ters provided no inter- vever, the Government rmit for use of the 200 April 15th. f the leading U. S. n on crystal receiver, most prominent, tho IZM, 2JU. e here is using 600 ng (call XAA) and il license. XAA was her night but doubt would be picked up, QRM experienced on ist District. His sigs QSA at Quebec, 172 rs to me that very good n 200 meters in this nges are nothing extra- ordinary but there seems to be nothing freakish about the ranges covered in day- light. We have several spark coil stations in Farnham, Que. 2AS, (Corvans- ville, Que.) 16 miles ease, picks up these stations every time they open up, using one valve for reception. .2AS’s sigs reported at XAA last Sunday afternoon, 60 miles with 4% KW. The Marconi Co. in this country have thrown a few legends to the winds and are now in the amateur game making appar- atus. The Radio Elec. & Supply Co. have been taken over by them and now the Scientific Experimenter Co., shares report- ed as 100,000. The Marconi stations now send out press daily for the amateurs. You readily understand that we Canadians are “up against it” when purchasing from the U. S. manufacturers now. After pay- ing 35 to 50% duty, there is an additional 10% on money. I have had a % KW transformer on order since Nov. 15th, not received to date. There seems to be no rush to filling orders from Canada. Must QRT now, OM. More later. Sincerely, Albert J. Lorimer. ” lo EXIT QRM IN ST. LOUIE 3424 Olive St., St. Louis, Mo., Jan. 21, 1920. Dear Eddy: Want to congratulate you on January QST as it certainly is a pippin. Was just reading the letter of John Clayton wherein he states that so much QRM prevails here in St. Louis that it’s NG when it comes to getting a MSG thru. Well, let me tell you something, Eddy; 5AF was right, as this was exactly the case here six weeks ago, but not now. BIll Woods and I took it upon ourselves to go around and see every ham in the city with a one inch spark coil up to a ten KW. Well, after putting in a lot of the good ole amateur pep we succeeded in getting ’em together one fine evening at what is now known as the St. Louis Radio Assn., and let me tell you, Eddy, they were there from ten years old up to fifty. Well, as Bill Woods had the best line

Page 49

March, 1920 it was decided that he start the thing off—and he did as follows: “Well, fellows, glad to see yer all here. I see a lot of old faces but the majority are new. Now the first thing we’re going to do is to find out who some of these lids are who cause all the QRM..... All right, Mr. Jones, step to the board and put down the calls which are reported..... LR. .HF .9— (Etc., ad inf.) Now then, is this Mr. LR in the crowd? (LRrises.) Well! So this is Mr. LR, fellows! (Just about this time LR sits down but is called upon to stand up again.) Now Mr. LR, you have a spark coil, have you not? (apologies!) Last. “sen. Bill: “And you have it connected across the aerial and ground, have you not? Lae “xen”. Bill: “Well, this is against the law and you'll have to get an oscillation trans former, condenser, etc.” LR: “What is an oscillation trans- former?” Bill: “Can any kind gentleman tel] the ” man what an oscillation transformer is? Bright lad in the rear rises: “Yes, an oscillation transformer is a hunkus you put in the aerial circuit to keep yer wave on 200 meters.” Bill: “Fine! to insert one aerial circuit pipe down.” Just at this stage LR gets sore, and with a great outburst says: “Why do you all pick me out? I hear a guy whose call is Now Mr. LR, you'll have of these hunkuses in yer or we'll have to ask you to CQ that’s always causing QRM. Why don’t you get him? (Laughter from crowd.) Bill: “Come to order, fellows. Now who is this next bird on the QRM list? Ah! Mr. 9— testy So they were all given the third degree and some awfully rash promises were made that it wouldn’t happen again. Rules were laid out to call a distant station three times, sign three times, repeat and then pipe down. To send a Morse “C’’, mean- ing “clear?”, and if no one is QRW two dots are given meaning “GA. And I want to tell you we got every lid in town down to those rules and our QRM-knock session takes place every two weeks, when all offenders are given the third degree. However, we still have a few outlaws, as they paid Bill Woods a visit one night last week and cut down his aerial, also stamping out in the snow a skull and cross- bones. But we’re laying for ’em with 45’s now. Hi! Well, Eddy, guess I’ve taken up a lot of yer valuable time but want to let you know what’s going on in this neck of the woods, so will QRX till we find out who cut Bill’s aerial down. Bennie (9KV, ex-9VP) QsT 47 IT’S A GREAT LIFE Del Mar, Calif., Dec. 8, 1919. Editor, QST: The following actually happened, and I repeat it just as it took place: Time: 10:30 p.m. Scene: 600 meters. The audion lights up slowly (we also use it for a desk light) and discloses our trusty pence il writing the following: .to my unc les for Christmas how do you get me now? “BU and FA de NPL QRT” “FA de NPL QRA?” “NPL de FA San Pedro I live here” “FA de NPL are you amateur?” (Silence) “NPL de BU “Are you amatur” “NPL de BU QRS” “Are you amat ure?” (NPL) “FA de BU ? ? QRM” “BU de FA what did NPL say?” “FA de BU don’t know he sent to fast” “NPL de FA QRS” (Silence. NPL may have fainted.) “BU de FA QRM will call again some don’t send so fast” (NPL) time GN GN” (1000 times) “FA de BU a trolley car just past and made QRM” (More silence.) Have you any hams in the East who can beat it? Yours truly, John F. Gray. ea, Bo, beat iteasy. Howzis?: de 1— my mamma says tell your mamma Mrs. Murphy says Mrs. Jones husband has lost his job and what does she know about that and if I come over ean she loan her a cup of flour until to- morrow morning?’’—Ed.) (J. F. G.: sa) FROM A QST ADVERTISER Davenport, Iowa., 1-20-20. Editor, QST: I was in the Navy in 1897. When Mar- coni started his wireless tricks we boys were on the job. I have been on the job but I have never seen such blamed since, headlong strides, in this or any game, that can come up to QST. Since advertising in QST, have had the opportunity to check up our answers and sales from eight wide- ly circulating wireless and electrical mag- azines and can say truthfully that in our opinion QST is the leader, at least for our class of mail-order business. Have sold tuners from answers to your ads in China, Mexico, Canada, Alaska, Honolulu, Santo Domingo, Porto Rico, and today we re- ceived a letter from ICELAND which we

Page 50

QSsST ewith. With the temper- ten below zero, we * Iceland Radio Worker m for his picture. Am t kind of a bird can live keep his mind on his Ve are going to send him r so he can hear at least s country and perhaps of your long distance rsonal regards and re- page for your next lially, TRESCO Kirwan, Sales Manager. 200 METERS! 107 McDaniel St., Dayton, Ohio., Jan. 20, 1920. teurs, readers of QST, in knowing of their mething of the wave » transmitting on. regulation Army short McCooks Aviation Field last evening, January he following stations. Decremeter in con- ed wave lengths at the 330; FH—410; 8AHT 1AE—220; HE—465; 55; 3CZ—235; 9FR— 2CC—320; 2ZM—340 will be taken as a favor Far be it from me to amateur myself—ex- r 8IX and 8EZ. I hope eyes of some of the robably think they were ngth, and keep them from nspector—please explain nateur friend, Roy Stanley Copp Radio Div., Civil Service.) ire that we are all highly s valuable information. e-opener, and the stations e outside the pale should thereof and govern them- y.) March, 1920 DX RECEPTION 1918 Smith St., Houston, Tex., Jan. 9, 1920. Editor, QST: Here’s “one better” on short wave DX receiving, asked for by Mr. Gisburne in December issue. On Nov. 25, 1919, at 11:50 p. m. I heard a faint station on 300 meters calling NAU. Realizing that NAU is over 2000 miles from here, I listened closely and got call letters KKT signed in. He was giving his TR and this is what I copied: “Arrive Barbados Thursday arrange 500 tons coal 19 r 21 north 52 degrees west 8 pm sig S Morris QSL on 600 pse K”’. Referring to your map and measuring the position given, you will find it to be approximately 2800 miles. 300 meters can’t carry? I have written the naval station operators at NAU telling them of the record. Very truly yours, C. W. Vick (5AC) PAGE DIOGENES! Kernersville, N. C. Jan. 23, 1920. Editor, QST: There’s no use of going any further— I have the record for wireless transmission. This thing of “‘one hundred and fifty miles with a Ford spark coil in daylight on a summer day” can’t touch me. ‘Tis said I did seven or eight hundred miles via radio when I haven’t even had a set in operation. Anyway, that’s what 5AF and half a dozen others said in the last QST. Yes, I ’spose it is about time for this super-prevarication to come to a halt, so I’ll explain. 4AA is reported as having been heard by a number of stations. That is my call, but honestly I haven’t done any transmitting this season. I guess our good friend Pope, of Atlanta, was using that before he was assigned his new call-4AG. The idea is this: I don’t want any credit that is due someone else, presumably new 4AG. I haven’t swam in yet, due to the fact that I have been away from home practically all the time. I hope soon to be able to remedy this sad state of affairs. (No kidding, it makes a fellow feel like “a man without a country” to read about the great things others are doing, and not be able to help). But just wait, I'll be “there” some of these days—even tho it’s with the characteristic slowness a Souther- ner is said to possess. Well, OM, this is my last until I am stripped and in action. CUL 73. W. M. Nelson.

Page 51

March, 1920 NEWS FROM NORTH CAROLINA Coast Guard Cutter “Seminole”, Wilmington, N. C., January 30, 1920. Editor, QST: Since sending in our last list of calls heard, sigs have just been pounding in here on board this vessel. We are very anxious to have the fellows know just how far their sigs are going. After making the rounds of the local amateur stations we find they are “undamped” enthusiasts without the proper apparatus for receiving long dis- tance sigs. We claim to be the only operators who are receiving long distance fellows in this vicinity and since no reports come from here it is well that we advise you of the calls heard. The following were heard within the past two nights: 2ZM, 2ZS, 3NC, 3KH, 3XC, 4AE, 5ZC, SBD, 8HG, 8IK, 8XK, 9AJ, 9HJ, 9ZN. The field is wide open for an American Radio Relay station in this town and when old 3AOW is released he anticipates taking full charge of all relaying in this locality. Many times long distance sigs are heard but the operator fails to sign off, thereby losing his call. Even if it is only sent once at the end there is a chance it may be picked up in some part of the country. Would like to hear from some of the fellows who have had success with the Amrad quenched gap. Let us all hear what it can do. The above calls are in addition to those already sent in and hope to see them in an early issue of QST. Coils designed by Mr. Bates were used throughout the entire receiving and believe me they “SURE DO WORK”. Success to all amateurs and QST, Sincerely yours, James F. Rau, C. A. Roethlinger. P.S. Why do all sailors know the moon is NOT made of green cheese; well they all went to C! INTERESTING RADIO JOBS OPEN NVH, 19 January, 1920. Dear KB— Here’s a little dope that may imterest some of the more adventurous among the League members. I know there was a time when I’d liked to have had a line on something like this. About April, there will be a demand for operators around Seattle, to come to Alaska for the summer season, from about April to September, to take the wireless job at various canneries. These require in most cases, first com- mercial licenses, although in some in- stances, men with second grade commer- cials, can get in. Now a little about the QSsT jobs themselves. In almost every instance they are what in known as ‘combinations’, that is, wire- less and storekeeper, or some similar com- bination. The wireless job amounts to half or three quarters of an hour a day, gener- ally, consisting in clearing with the near- est Naval station. The salmon canneries are so located, that they get mail only about once a week, and wireless therefore handles considerable business to and from each cannery. An op takes the job, acting as, say store- keeper, for six or seven hours a day, and clears perhaps twice a day on a regular schedule with his nearest naval station. His day’s work is completed then, but as the radio quarters are in most cases right with the instruments, there’s all kinds of oppor- tunity for experimenting in the evenings, particularly as the operator reigns supreme, in so far as the apparatus is concerned. The majority of installations are of half kilowatt 500 cycle capacity, although some run up to one KW, depending on distance from naval station. The combination jobs pay from $125 to $175 a month, with board and quarters and in a season a fellow can lay up $500 anyway to come out with in the fall. He gets a good vacation too, and has some good experience. An opportunity is offered also to make considerable overtime money, when ships arrive to load cased salmon. Stick this in some corner of QST, and if any of the boys are interested, let ’em write me direct, and I’ll give ’em dope on where to file their applications etc. It will be necessary for them to pay their own fare to Seattle, but from Seattle to Alaska, first class transportation and ex- penses are furnished, fare also being paid back to Seattle at close of season. Sincerely yours, H. 8S. Pyle. CE (ro) USN Navy Radio, Ketchikan, Address me: Alaska. —GOOD WORK— 1625 Locust St., Philadelphia, Pa., Feb. 4, 1920. To Editor of QST: I would like to report to you what I think is a new record for long distance spark coil transmission, and possibly a new record for miles per watt input. During January, I have been heard several times by 9AJ, H. A. Mackley, Peoria, Illinois; in the neighborhood of nine hundred fifty miles from here. Mr. Mackley reports that my signals are so strong at times that he cannot work local stations. Here is a brief description of my transmitter. “Ford” spark coil which gives a high

Page 52

Editor Er dues Whil enthu enter opport | ‘ which each thoug! I am over smalls for \ nize | outsia The | as I the I It wi stem would be s« have f the plate backer “ARRI is re whicl extra from buttor not to Th device for “ in pre some I first when a QsT March, 1920 similar to a five hundred nser .0017 mfd. capacity. n of oscillation trans- straight semi-quenched one hundred feet high, f, eighty feet long, six and a half feet. Input irk coil, forty five watts. nna circuit, two amperes. a remarkable distance These statements will borated by Mr. Mackley will also see my call iry QST as being heard N. ¥. I would like to who has a better record wants more information tter, Does anyone hear Well, 73 for now. Bayard P. Fonda. YORD “AMATEUR” Box 33, Tallman, N. Y., Jan. 15, 1920. is an application and nip in the A. R. R. L. ember, I have been an reader since before we and I am taking this press some of my views. ir idea of an emblem by members can recognize excellent one. I have time that one was needed. 1 small lapel button not nch in diameter. The neonspicuous, the better, bers would easily recog- lesign at a distance and be interested anyhow. leration is not important, that an advertisement of ntended in this manner. thin, threaded shank or er of the back, which he cloth of the lapel and nut on the other side. I method of fastening to be tory. It would be gold ld center on a blue enamel 1is background contains letters. The gold center the wearer’s call letters eferably be engraved at order, when purchased The cost of a neat vily gold plated, ought an 50c, I should think. to mind two of the friend of mine used to use low amateurs in a crowd They may be useful to re collecting subscriptions. acquaintance on a train, ng fellow sauntered slowly up the aisle, regarded my youthful appear- ance with a speculative eye, and dropped into the empty seat beside me, withdrawing a QST from his pocket as he did so. I had heard of QST and I immediately rose to the bait and introduced myself as a a fellow amateur. After a few minutes of conversation, he invited me to inspect his issue, remarking as he did so, that he would be pleased to accept my subscription —which he later did; also that of a friend of mine thru me. Thus also, was I first introduced to QST, which, I am glad to say, I have never regretted. This, my friend later told me, was his favorite method. He would also whistle the code when in a crowd, which occasionally brought results. I should like very much to reply thru you, to Mr. W. L. Matteson, who in the December QST, voices his disapproval of the designation “Amateur’’, as applied to us. To begin with, Mr. Matteson is under a very great misapprehension as to the meaning of the term. The name “Amateur” is no indication of, or reflection upon, the ability of a person in his chosen line of endeavor; it merely means one who is a non-professional. Any dictionary will verify the above statement. The fact that the average professional operator is as far above the average “Ham”’, as the advanced amateur is above the average professional, does not alter the case. I, for one, am very proud of my status as an amateur, for it means that in the Radio Art, instead of being employed for money and under the authority of my employer, I am a free agent, pursuing the game for the love of it. In closing, Mr. Editor, I should like to express my appreciation of the obviously genuine Amateur Spirit of the League and of your magazine. Very truly yours, Dundas P. Tucker. SPARK COIL TRANSMISSION 593 Cass St., Milwaukee, Wis., 1/12/20. Editor, QST: It might be interesting to a few spark coil enthusiasts to know that I have been heard by 9BT at Topeka, Kans., approxi- mately 400 miles, on a 2 inch spark coil, operated on 110 v. D. C. with an inter- rupter, and a 4-lug rotary gap going at 8000 r.p.m. The tone produced is exact- ly like a 240 cycle synchronous set, such as VBB, VBA, etc. 8AH at Youngstown, O., and 8DA at Salem, also report QSA, so for the love uv Mike, fellows, if you hear 9HW please write and tell me about it, because I don’t believe there are very many fellows getting results like that with a spark coil. 73. Yours truly, Clarence F. Bates.

Page 53

‘EE ein

vy +~t HNN WW II ni mT LIM y#2 iy I] I} (] } I \ 1H tH MH! j HW HHH Ht i Hill HI HI Hh I! | Il MH + el > |

an

MM Hii i} | | /

\Zlost SUBSCRIPTION CONTEST February 11, 1920. Well, she’s over, and I’ve been figuring up scores all morning. Yes, there was a whirlwindy finish all right, and one chap pulled me out of bed at 11:59 last night to register the fruits of his labor at a nearby radio club meeting. The prize winners are as follows: ee te, TW, Bee, Bes TD... 5.6 0'b: ait ein 60.0.0. 0n6idene weinic as 6h eee 2d Prize, Jno. L. Reinartz, South Manchester, Ct................... 480 Points ee eee, See. es og ee, Cee. Cee ae chkiscchoneases 420 Points i ee ee rr ee 402 Points 5th Prize, Herbert Richter, Collegeville, Minn....................... 382 Points 6th Prize, K. E. Hiorns, Librarian, Attleboro, Mass..................336 Points Te ee, Wha as, ees en, See MUO Te, nw ack cn nwcess 60 Ob ha 270 Points 8th Prize, R. D. McCommon, East Palestine, O...................... 252 Points 9th Prize, H. J. Burhop, Manitowoc, Wisc...........cccccccsccccvces 216 Points 10th Prize, Walter Kolb, Pelham, N. Y... Portland, Ore... 12th Prize, Thos. F. Hunter, Elizabeth, N. Anderson, Ridgewood, llth Prize, J. D. Hertz, E. E. 120 Points — Ss ee ee 120 Points a ae eee 120 Points We’re going to have another contest soon and then we hope that those who were not winners in this contest will qualify for a prize. To all you we give our hearty thanks for your work. The Contest Manager. in on the key as soon as he was thru and had a ham fest with Mrs. C. and ever since then I’ve been mentally hopeless. And then yesterday that blamed little tempter of a QST showed up and -------- . But why talk about it? Suffice it to say that today I was sitting in the library trying to assimilate a lot of bul] having to do with the government, Congress and a lot of other unnecessary evils of this country but the whole time I was wishing I had three hundred bones or thereabouts, lots of space and the permission of my landlady to do my worst. Aw h--ell! Hastily, Kern.

Page 54

CLASSIFIE! Five cents p: and address by the 10th FOR SALI former and hot wire met WANTED—S kast 71 St., FOR SALE ed condenser Key. Al co hiach. FOR SALI 3.6. Al con indsana FOR SALE weil-known material is condition, ha 1 KW Hyton panei and wu Clapp-tastha piete, with Bo Blitzen Tun« each; 1 Birt $3.00; 1 Blitz $2.00; 3 5B mounted, $1 on Italian Detectors, §$ $2.50; 1 Pair 1 Two-Step speaking ho pancake typ« Transmitter Mesco Prima 1 No. 496, 4 telegraph so 85 cents; 2 Low Frequen Telegraph Key $1.50; 1 Geis 4 volt type ‘ meters, $1.75 $0.50 each; 4 mounted $0.3 switch, $3.00 Terms cash w Chas. Coultas Ave., St. Lot FOR SALE Fone. H. S FOR SALI new Grebe CR N. E.. Washin FOR SALE Unit Set with E. Edson, Ha two stage vT P. A. Stover FOR SALI 36-gauge sh Bridge; and No. 7, Box 2 FOR SALI Motor generat RPM Indu« generator, Write for Pine, St. Lo

ADVERTISEMENTS insertion, in advance. Name ted. Copy must be received succeeding month's issue. = sl switch, oscillation trans- ondensers. Clapp-Eastham ‘avy phones—good cond.tion. al switch. Dr. Cyriax, 219 ty ordarson, 4 sections. Mould- Transtormer, Heavy duty J. K. BrookerpCass City, Packard transformer, Mounted, <well Hutchinson, Middlebury, « Radio Apparatus from the o Station of OLR. This st @erade stuff, in first-class y little use. 1 Clapp-Eastham 220 volts, compiete with new, $400.00; One ¥, KW ansmutter, 110 volts, com- w, $150.00; 2 Clapp-Eastham type, 1500 meters, $7.00 ndenser in gtass case, new, idenser, without glass case, Condensers, assemoled, un- spp-Eastham Ferron Detector $3.00; 2 Murdock Silicon Murdeck Variable Condenser, ot Phones, 3000 ohms, $5.00; phone Amplifier, with loud Muiti Auditone loose coupler, veters, $10.00; 1 Telephone telephone work, $2.00; 1 No. 439, plug type, $2.00; »ark Coil, $6.00; Two 5 ohm each; 1 Crystaloi Detector, ancy Buzzers, $1.00 each; 2 cents each; 1 Nickel Plated $1.20; One ¥g KW Spark Gap, 0; 1 Battery Motor, Knapp Double Slide Tuner, 1500 ockets with short brackets, I nickel plated switches, un- ‘T 100 amp. 500 volt ground Switch on wood base, $1.25. Particulars given on request. f Station 9LR, 950 Beach pay postage. anemitter, 2 step Multi-Audi- 1 Maple Ave., St. Louis Mo. order for $55.00 takes brand W. A. Parks, 1220 Jackson, »nna Switch, $3.00; DeForest d V.T. Tube, $60.00. Robert Short wave regenerative net in case. WANT one or nplete. All letters answe wa |, mercury interrupter; two snometer; 1 Wheatstone H atus A. ind. ew a udiotrons, ndamped work, L ect connected to ty First $75.00 takes it. atus. WwW. E. Woods, 1106 FOR SALE: Undamped wave coupler, 20,000 Meters, Navy- cy ee Murdock Coupler No. 344, $6.00. Holtzer t—3000 ohm phones, new $10.00. Elmer G. Baier, 253 Ninth St., Brooklyn, N. Y. FOR La Blitzen Tuner, Three Murdock Variables and loa coil, loose coupler. B. Weed, 224 Saint Ronan Street, New Haven, Conn. CASH: 1 K.W. Thordarson Transformer, $19.50; 1% K.W. Packard Transformer, oil immersed, $8.00; Pair my Brandes Phones, $11.00. B. Wendeln, St. Marys, Ohio. FOR SALE: One No. 2 Jr. Omnigraph, with six sets of records, $12.00. Maurice E. Kimmel, DuQuoin, Uinels. : . i FOR SALE: DeForest Honeycomb mounting, seven assorted coils, all NEW. Cost $23.10. First MO for $18.00 takes them. E. C. Jones, Jr., Fairmont, W. Va. WANTED: Several General Electric VT-11 tubes, if cheap. Edit Editor, _ QsT. ei THE AUDION. its early history and development, Electron Theory and Trigger Action, compiled by a Chief Electrican Radio who was stationed at the Naval School as Instructor for two years, written by an old amateur for the amateurs in words that they can understand. Alsc blue print diagrams for hook ups for receiving damped signals, using both air exhausted and gas bubs. Receiving undamped signals and re- generative circuits. Two-step amplifier, using same (A) and (B) batteries for both steps. Wireless telephony with power bulb. Working biue prints on how to build a “One to One” transformer for use with Audion Amplifier. All for $2.00. Address T. O. McKeazie, 104 Warburtes Ave., Yonkers, N. Y. THE OPERATING DEPARTMENT (Concluded from page 34) A The station of Mr. Isaac is going again. It is a very elaborate station and is quite prominent in relay work. It works 9EE Valley City, N. D, regularly, as well as a number of more distant points. Mr. Isaac reports some excellent pre-war records and ought to make a good relay station for the district. A communication was recently received from the North Dakota District Superin- tendent, 9EE, Russell Pray, Valley City, N. D. He reports very few stations going in his district, and wishes to get in touch with some good stations outside of his district. He is well able to hold down his end of the line as will be noticed by his list of stations heard and worked. His relay operations may be heard any where in the S. D. district nearly every night. The district of South Dakota may be a little slower in getting started than some eastern districts which are more populated and which have all their supplies at their door. This, however, does not alter the fact that we have some station owners who are good operators and once they get start- ed will add considerable strength to the League’s traffic routes. Harold Larson, South Dakota District Superintendent.

SEND 50 CENTS at once for special Three Months’ Subscription Yearly subscription $2.00 or 20c a copy at newstands. Internat’! Society of Radioists Executive Headquarters OMAHA, U.

ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 55

This space reserved for Radio Equipment Co. 1525 North Fawn St. Philadelphia, Pa. CHICAGO AMATEURS and others in the Middle West, send us your orders and secure immediate shipment. We carry DeForest, Brandes, Acme and Federal Amplifying Transformers, Burgess “B” Batter- ies, Honeycomb Coils, Marconi Tubes, Sockets, etc. Order direct from DeForest catalog or send 10c for new one and a number of other interesting bulletins. Lists of Vacuum Tube Apparatus and bulletins free upon request. Order anything in the DeForest catalog and see what “immediate shipment” means. Chicago Radio Apparatus Company “Dependable Radio Apparatus’”’ 3400 Michigan Ave., Chicago, Ill. Stromberg- Carlson RADIO HEAD SET A set that com- bines your ideal of extreme sen- sitiveness with a strong, durable construction that stands the gaff of continuous ser- vice ashore or aboard ship. All operating parts housed in dust-proof and moisture-proof aluminum cases. The diaphragm is mounted metal-to-metal in such a way that temperature variation will not disturb the air- gap adjustments. Non-conducting spool heads and slotted pole tips eliminate 90 per cent of the eddy current losses that are found in other head sets. Each set is wound to a resistance of 2,000 ohms with pure copper wire and furnished complete with 6-foot moisture-proof cord attached. Tested for matched diaphragm tuning and operating qualities in actual service before shipment. Send $12.00 for sample set for trial in your own station—satisfaction guaranteed or your money refunded upon return of set. Write for Bulletin 1106 giving f full particulars. Stromberg-Carlson Telephone Mfg. Co. Rochester, N. Y. Chicago,, Ill. Kansas City, Me. Toronto Ont. School established 45 years. LEARN WIRELESS TELEGRAPHY]| Fascinating and Educational Work--Big Salaries Prepare Now The United States Shipping Board is making heavy demands upon us for Dodge-trained wireless oper- ators. Travel all over the world, secure, free, unsurpassed living We Also Teach Morse Wire) Telegraphy and Railway Accounting Endorsed by wireless, railway and telegraph officials. Low rates. Students can earn living expenses while attending school. Dodge’s Telegraph and Wireless Institute accommodations and earn a bigsalary, Catalog Free. Write Today, 27th St. Valparaiso, Indiana ATTENTION! lowa and Central States Amateurs You will get most prompt service by purchasing your apparatus from a dealer in your territory. I handle all leading makes. Immediate deliveries on AudioTrons and B Batteries. Send for new bulle- tin of VACUUM TUBE EQUIPMENT. Arthur B. Church, Wireless Specialist LAMONI, IOWA. “Distributor of high grade redio equipment since 19/4" Loose Couplers Aadion Detectors Parts and Accessories ARNO Send 4c stamps for literature which is sure to interest you J_F._ARNOLD 20° tescista Toto —_—_——_—_——— LEUMITE The Ultra-sensitive DETECTOR CRYSTAL Marvelous for fine adjustment, clearness of signals and stability. . Guaranteed crystal, 25c coin. LEUMAS LABORATORIES 1304 Park Ave., New York City RADIO TRAFFIC ASSOCIATION An organization devoted to the improve- ment of Amateur Radio Traffic conditions. Brooklyn, New York AFFILIATED WITH THE A. R. R. L. NEW ORLEANS WIRELESS SUPPLIES AND MINERALS OF ALL DESCRIPTIONS A. ROSE 4323 MAGNOLIA STREET NEW ORLEANS, LA. SEND 6 CENTS FOR CATALOG DE FOREST APPARATUS & SUPPLIES GOUSE & LORENSON HUDSON, N. Y. Consolidated Radio Call Book $1.00 ALWAYS MENTION QS T WHEN WRITING TO ADVERTISERS ee ee ER

Page 56

suring WITH A BIG IDEA, WE ARE GROWING ALT K @ the great need of a single supply house that could furnish all make ,dio apparatus, the National Radio Supply Company was organized in M )19. When our Bulletin No. 1 was issued, on April 15th, we had the ,cy for 40 different concerns. When Catalog No. 2, issued in July, this | grown to 62 Companies. Today there are 91 firms whose radio appa e handle. Those companies whose goods we do not sell can be coun he fingers of your right hand. Think of the convenience this means to y | page Catalog No. 2 shows more radio apparatus than any other heret ublished. Ten cents in stamps will bring it to your door. New price tin “D” forwarded upon request to those who already have this wonds book. lio expert will answer your questions without charge, if a stamped and a ed envelope is included with your queries. NATIONAL RADIO SUPPLY CO., “The Nation’s Clearing House” Dept. 120, 808 Ninth St., N. W., Washington, D. C. Look for our announcement in April issue. Se The Bigcest, Busiest and Best Radio Supply Store in New England Our expert advice is yours for the asking. We can give you prompt and courteous attention. Our stock is complete from the “Tower to the Key”’. RCHANT CO. 9 Avery Street, Boston — Free Apparatus For every subscription that you secure for “Pacific Radio News” we will award a coupon valued at fifty cents that is redeemable at the leading radio supply houses in the United States. THE “ILLIN ’ ARIABLE CONDENSER Enter the contest at once to get a : Aluminum Plates Three St nel, No. 2. Open Type as good start. shown, N seed, Anti Profiteer. Less : k : Se ae tasted. Your own subscription counts— $ | Money back if not Subscribe today. tisfied. Just ret condones? @tihia 38 15¢c per copy. $1.50 per year. 00 days by insured P. P. ade 2 — ~~ —— = aE kmans hip. erso y we «fe . . . to Amateurs who have Pacific Radio Publishing Co. and “weather” from 9ZS. } Black Ave., Springfield, Il. 50 Main St., San Francisco, Cal. ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 57

Audictron Adapter Honey Comb Coil Adapter yO Stop-Look-Listen ! The TeCo Specialists enter the wireless field with pro- ducts not known to the Amateurs.

is tou make the present more appar- Our aim flexible atus.

The cuts here show how they can be applied. any standard 4-point socket.

Let us supply your wireless Are You Listening to Norway? wants at a moderate price. Will fit 200 to 20,000 Meters Price $1.50 per pair. Post Paid. Dealers write us for propo- sition. Patent Applied For. Price $1.75 Post Paid. The TeCo Radio Co., P. O. Box No. 3362, Boston, Mass.

PAPER TUBES For constructing loose couplers, loading coils, variometers, etc., smooth, round, gray, seamless, tubes. FOR 3500 METER COUPLER Laboratory Signs Attractive 8” x 10” signs printed on high quality coated white cardboard in selected wordings for the electrical experimenter. Primary 3%” outside dia. 7” long—25c Secondary 3%” outside dia. 6” long—20c FOR VARIOMETERS 4%” outside dia. 2%” long—12c 3%” outside dia. 2” long—10c FOR LOADING COILS 3%" Outside Dia. 14” long—40c % ” Outside Dia. 14” long—50c Special ne 8” bm Order To 15” long 34 ia.—4c per in. 3 % ” dia.—5e per in. 4%” dia.—6c per in. 15c¢ EACH, ANY TWO FOR 25c All tubes have %” wall. ALL 5 FOR 50c IMMEDIATE SHIPMENTS, POSTPAID. THE TAYLOR COMPANY, BOX 1043C, DANGER! HIGH VOLTAGE EXPERIMENTAL RADIO LABORATORY NO ADMITTANCE GOVERNMENT LICENSED RADIO STATION DO NOT TOUCH THE INSTRUMENTS PLEASE BE QUIET WHILE THE OPERATOR IS RECEIVING Primary Secondary LOWELL, MASS.

The B & H Mounting for Radisco, DeForest and other coils THE single support allows easy change of coils with ample length of rod to allow very loose coupling. The square rod prevents coils from Turning. Special Stands and Centers Made to Order. THE MOST EFFICIENT STAND ON THE MARKET Pat. Applied For. Radisco DeForest Special No. 1R Complete with 6 Binding posts, flexible leads and 3 Coil centers, $6.00 $6.50 $7.00 No. 2R Complete with 3 Coil centers, flexible leads but without Binding posts . = << = No. 3R Extra Coil Centers, ore, size) FINISHED IN WEATHERED OAK HIGH FREQUENCY CABLE (LITZ) 10-38 20-38 16-2-38 16-3-38 DSC, Enameled—any other size and covering to Order. Send Sc stamp for further particulars. A. T. HOVEY Dept. B,

SUPPLIES BOSTON-17-MASS. WIRELESS 61 BELVIDERE STREET, ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 58

The Klitzen Rotary Gap offer st efficient progressive 2” of cur- ns a saving eters in the the closed cooling rement. 522.00 catalogue listribution. KLITZEN RADIO MFG CO., 1501 Flett Ave., Racine, Wis.

ee

“COSRADIO” < of Quality YOUR ENERGY— Bakelite supports— Guaranteed—$12.00 THE COSRADIO CO. KANSAS

UP—DOWN OR—SIDEWAYS £ ACE E No matter how you want to look at “Ace” instruments, they are ideal for an up-to-date radio installation. Doctor “ACE” has tonic for weak signals that give them kick and on transmitting apparatus he sure has the dope. Better get acquainted with “Doc.” You may pay more, but you can’t buy better. The Precision Equipment Co. ., Inc. Manufacturing Engineers. 2437 Gilbert Ave., Dept. D, Cincinnati, Ohio.

ALWAYS MENTION QS T WHEN WRITING TO ADVERTISERS

Page 59

G. A. STANDARIZED SUPPLIES STANDARD BAKELITE PANELS. The highest grade of insulating material obtainable. The use of standard sizes of panels makes possible the interchangeable design of equipment. Size 1/8 in. Thick Weight 3/16 in. Thick Weight 1/4 in. Thick — 5x 5 ins. $0.60 $0.88 1 Ib. $1.16 5x10 ins. \. \. 2.30 2 ib. 10x10 ins. bi . r » 4.60 2 ib. 10x15 ins. 3.50 Ib. \. 6.85 3 Ib. Accurately cut, always kept in stock. Shipping charges extra. G. A. STANDARDIZED B BATTERIES, 22.5 VOLTS Built to specifications of U. S. Signal Corps and Bureau of Steam Engineering. Made by the formula used for 90% of the B batteries by the Government. G. A. batteries last longer and are cheaper than flashlight cells, Made for V.T.’s and Audiotrons. Need no voltage adjustment tho they can be u with a potentiometer. Two Navy type batteries with one V.T. will transmit 2 to 5 miles telephone, or 4 to 10 miles telegraph. Three or four will give much greater range. SIGNAL CORPS TYPE, 3%” 1 , 2” wide, 2%,” high, operates one V.T. 250 hours continually average life 3 months, $1 50, weig t 1 pound. Mailing extra. NAVY TYPE, 6%” long, 4” wide, 3” high, operates one V.T. 1,000 hours continually, average life 10 months, $2.50, weight 5 pounds. Matline extra. G. A. STANDARD H. F. CABLE FOR RECEIVERS AND V. T. TRANSMITTERS 10 No. 38 cable, D.S. covered, for receiving coils. Good for 2-bank winding. 40 turns per inch. Price per 100 feet $0.60. 20 No. 38 cable, D.S. covered. Gives greater signal strength and sharper tuning than solid wire, 35 turns per in., 100 feet $0.95. 3x16 No. 38 cable, D.S. covered. Must be used for V.T. efficiency 17 t.p.i, 100 feet $2.00. N . wire, ¥% Ib., $0.50—¥, Ib., $1.00—1 Ib., $2.00 . wire, % Ib. 0.60—', Ib. 1.20—1 Ib., 2.40 . — ¥%, ib, 0.75—%¥, Ib., 1.50—1 Ib., = ire, % Ib. 0.90—%, Ib. 1.80—1 lb. G. A. SUPPLIES ARE. ‘SOLD Y MAIL ONLY. NO GOODS SOLD AT THE ‘NEW YORK OFFICE. Cw wn The General Apparatus Company 15-T West 45th Street, New York City transmitting inductances for maximum QUICK SERVICE ABSOLUTE RELIABILITY MONEY BACK GUARANTEE ON EVERY ORDER State size : > SS Size 5 1g ne a , Complete ~ $4.50 Size 4%” Complete $4.00 Size 3%” Complete $2.85 No. 1031 Spark Gap 75 cents. 5% &% &% & Inch 7138 6647 7282 7127 $1.40 $1.25 $2.50 $1.40 % No. 7160 $1.90 Per 100. For polished nickel add ic each. Continental Electric Company 117 East 129th St. N., New York, N. Y. Get illustrated folder on Binding Posts. 3 Inch Dial Indicator FINE BLACK COMPOSITION DIAL No. 66 without Knob $0.75 postpaid No. 67 with Bakelite Knob $1.30 postpaid FOR SALE AT ALL RADISCO AGENCIES NEW 30 page catalog just out. Send 10c stamps or coin A. H. CORWIN & CO. 4 West Park Street, Newark, N. J. ALWAYS MENTION QS T WHEN WRITING TO ADVERTISERS 57

Page 60

a WIRELESS SPECIAL Comfortable Soft Tone DHE pms" § HEADSET $6.00 WE CARRY A COMPLETE LINE OF rTANDARD HIGH GRADE RADIO APPARATUS Our Radio Catalog has been Delayed neement will be made when it is ready for distribution UBLEDAY-HILL ELECTRIC CO. RADIO DEPT.—DESK A \ve., PITTSBURGH, PA. 715 12th St. WASHINGTON, D.C | | YOUR GOOD MONEY SAVED |! | |The Man |Who Builds His $10 Postpaid Qwn Wireless Apparatus Are you one of the men who takes more interest in constructing his own wireless apparatus than in purchasing the complete set from the manufacturer? Our price lists save for you— | stam oroves i y You have thousands of fellow enthusiasts all over : . at NOW | this country. There surely is heaps of satisfaction in “making your own” apparatus and knowing exactly the kind and quantity of material that goes into each working unit. Your insulation may be good or bad according to the material used. Ask any of the former amateurs and experimenters what satisfaction they secured from genuine BAKELITE-DILECTO then ask the modern wireless man what he thinks of this insulation. You will find BAKELITE-DILECTO used wherever insulation is needed in the better types of modern apparatus. It’s so convenient to use because it is furnished in Sheets, Rods and Tubes. Waterproof, permanent and strong. We manufacture Vulcanized Fibre, Conite and MIGNON RECEIVING CABINRT Continental Bakelite. mas ; Let us show you how our Standard Products SPECIAI r amateurs, commercial can be made to solve your insulating problems. and ship nstruction, Guaranteed. THE CONTINENTAL FIBRE CO. NEWARK, DELAWARE 233 Broadway, 332 S. Michigan Ave., New York City Chicago, Il. 525 Market St., 411 S. Main St., — San Francisco, Cal. Los Angeles, Cal. ~ =e 301 Fifth Ave., Pittsburgh, Pa. “& SUPPLY COMPANY FOR THE RADIO AMATEUR Canadian Office Cor. King and Yonge Streets, Toronto, Ont., Canada 2 ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 61

NAUEN, GERMANY COPIED IN THE DAYTIME on 90 foot Antenna with one DeForest “Honey Comb” Inductance Coil and one V.T. Freak work? Not at all! Try it yourself on your own Antenna. Here is The Formula— if fixed Grid Condenser is used, Grid VARIABLE GRIOLEAR leak must be adjusted very 2 carefully. Wave length range, 7375 to 17,500 meters with average Antenna of .0007 mfds. - “Bhs capacity. This circuit works wonseveome con | Lie equally well on short waves, OOS eros sHiitit— «vest regenerating the spark signals asy "Went to a remarkable degree. Mere- ol ly plug in a No. L-100 “Honey Comb” Coil in place of the No. L-1500 and listen to the 600 meter traffic pound in. Wave length with No. L-100 Coil, 430 to 1010 meters. IMPORTANT NOTICE Our production of DeForest “Honey Comb” Inductance Coils has finally equalled the demand. From now on the genuine DeForest “Honey Comb” Coils can be supplied Unmounted for 50 cents less than the list prices for mounted Coils. Send for the DeForest Catalog C Contains complete details regarding “Honey Comb” Coils, and gives des- criptions and prices on many articles of Receiving Apparatus, with valuable hook-ups and other information. Sent postpaid for 10 cents in stamps. Send for yours today. De Forest Radio Tel. and Tel. Co. Inventors and Manufacturers of Amateur and Commercial Radio Apparatus of Highest Grade 1407 Sedgwick Avenue New York City ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 62

OVER 200 MILES Is the distance that has been covered by our 4 K.W. Special wireless transformer. Has any A. R. R. L. amateur transmitted a greater distance with this transformer ? Let us hear of your records. Power Factor 91% WRITE FOR OUR NEW CATALOG “T-21” Thordarson Electric Manufacturing Co. 501 S. JEFFERSON STREET CHICAGO, ILL. “GET THEM-RIGHT NOW | | AWireless Message In or troduce the quality from Detroit of “M \pparatus and Ac- Licensed Radio Operators are in constant : ar demand by the Commercial Land Radio Service, cesst future patronizers, Telegraph Companies, Merchant Marine, Lake we a ng for a period of and Ocean Steamship Lines, etc., ONE MONTH ONLY Our Minimum Salary of $125 per Month, Plus Board and Room Per} ey B 9 Battery is now being paid. Many operators are receiving i 1: : j : | much more than that. i . Our course in Radio Telegraphy, under the ¢ ) at e ostpaid to any direction of S. W. Edwards, U. S. Radio In- part U. S. or Canada. spector, offers the highest class instruction fer closes at available. New, complete equipment. Day or ‘ evening classes. Opportunity to earn expenses e O’clock noon while here. RIL 1, 1920. Our day class prepares for First-Class Radio Operator's examination in three months, Orde neh today. orders night class in 18 weeks. filled tole ° Before deciding where to get your Radio ied g to rotation. training, write for our Free Illustrated Booklet. a ere enna : Detroit MERCUI RADIO APPLIANCE CO. Institute of Technology 672 Br Brooklyn, New York 303 Y.M.C.A. Bldg Detroit ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 63

~ ] ! Get That Clean-Cut Musical Note ! Our Hy-Rad rotary gap will give it to you. Used by 9ZN, 9EE, 9EY, 81K, 9ZL, and many other prominent long distance stations Immediate shipment can be made of discs to fit 1/4”, 5/16”, and 3/8” shafts. Other sizes furnished at no increase in price, but with ten days shipping delay. Discs are 9” in diameter, and 1” thick, of special long-wearing aluminum alloy, with Bakelite center. Teeth are our famous “‘saw-wheel” type, giving excellent mechanical quenching as well as constructional strength. Every disc carefully balanced on knife edges before shipment, thus eliminating all rattling and vibration. Hy-Rad disc, 8 point, as illustrated $10.50 | - CHICAGO RADIO LABORATORY 1316 CARMEN AVENUE 5525 SHERIDAN ROAD CHICAGO, ILLINOIS THE BENWOOD BATTERY CHARGER Keeps your “A” battery always ready. As essential as the battery itself. Especially so if you use an amplifier. Charges battery over night. Pays for itself in one season. Brings your station up-to-date. Connects to any 60 cycle 110 volt current supply. Designed for 4 to 6 volt battery. No external con- trols necessary. Already used by many leading | amateurs. Price $20.00 BENWOOD SPECIALTY CO., 3424 Olive Street, _St. Louis, Mo. “P.W.” HAS THE LATEST RADIO APPARATUS IN PHILA. We have the “Radisco” agency for Philadelphia and vicinity; also distributors for Clapp-Eastham, Murdock, DeForest, Acme Ap- paratus, International Radio, Kilbourne and Clark, Benwood Rotary Quenched, Perfection Variables and Tuners, Universal Wound In- ductances, and Better “B” Batteries. Est. 1911. Radio Call “3PW” PHILA. SCHOOL OF WIRELESS TELEGRAPHY Parkway Bldg., Broad Street near Arch WORCEST VV A ER RADIO LABORATORIES ALWAYS MENTION QS T WHEN WRITING TO ADVERTISERS

Page 64

Mignon “RW4” Undamped Wave Receptors LOOSE COUPLERS LOADING COILS VARIOMETERS AMPLIFIERS Strongest, most distinct signals IZE 12” x9//x6%/" — IMPORTANT NOTICE — Mignon, Inventor of the famous disc-core Undamped Wave Receptor, is no longer vith the Mignon Wireless Corporation of Elmira, N. Y. or their successors, tadio Manufacturing Corporation. Address all communications for Mignon Apparatus to MIGNON MFG. CORP., NEWARK, N. J. and undamped wave apparatus for all purposes ality . rsed by Radio Dept. of D. L. & W. Ry. Co. [Wicnox STEM WRITE FOR LITERATURE (DEPT. Q) MIGNON MANUFACTURING CORPORATION, Newark, N. J. “2,4iX* “ASK ANYONE WHO HAS USED IT’ WHAT OUR PATRONS SAY “T can hear the signals three times as loud and clear as I could with my old receivers.” (Name on Request) BRANDES . a ortunity ee oe es Genera! Radio Co. Type 127A HOT WIRE AMMETER ‘Superior’ 2000 ohms $7 Special P $5.00—Regularly $10.00 TRIAL a ying hy we aed A portion e meters are 0-1 ampere and clearness and distance. If within ten days a portion peres. They are mounted in OFFER you're not only satisfied but enthusiastic over flush cas w, im good a, were them — back comes your money without a question. left on o by termination o war. ‘ Exactly | e number supplied by us to wee Te ee ee the f= gut a Pi the U. 5S ont the signals and prevent blurring. Use ma €. S. end for proposition. Government experts, and experts abroad ; by coll and technical schools; and by professionals and amateurs Have y ed our new Bulletin 9017 everywhere. SEND 4c. FOR CATALOGUE F General Radio Co. C. BRANDES, Ine. NDSOR STREET , Room 821, 32 Union Square, New York Cambrid 39 Massachusetts WIRELESS RECEIVER SPECIALISTS 62 ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 65

A Good Wavemeter AT A MODERATE PRICE is accurate simple and rugged. Comprises a portable oak case 534” x84” x6,” with hinged cover, bakelite panel, balanced condenser, buzzer, detector, switch, binding posts, and two 2 unit inductance windings, range 200 to 2000 meters. Price $27.50 These meters are in stock for im- mediate delivery and are carried in stock by most good dealers. TYPE B. OQ. WAVEMETER Bulletins Z and F sent for 4c Stamps list our complete line of high grade, moderately priced apparatus for the radio laboratory. Bulletin R lists the Cambridge Rectifier for Storage Battery Charging. CLAPP-EASTHAM CO., 114 Main St., Cambridge, Mass. MADE GOOD The Acme Audio Frequency Amplifying Transformers have certainly made good. They are being used by at least three of the foremost manufacturers of high grade Amplifying Units. These manufacturers choose the Acme Transformer after thorough tests have shown it to be the proper design for the Marconi V.T. Thousands of amateurs throughout the country are enthusiastic over its performance. Many of whom use it with other tubes. Take no chances—get Acme Transformers for that new two step Amplifier you are building. Most dealers have them, but if yours does not just write us and send his name. BULLETIN ON REQUEST ACME APPARATUS CO., No. 26 Windsor St., Cambridge 39, Mass. RADISCO COILS Cat. No. and turns Apx. Inductance in Wavelength Range Millihenries with .001 Variable 40 d 225 100 d 460 175 d 750 325 . 1375 550 J 2250 750 35. 3000 ¢ 1200 . 6000 7 Radisco Coils may be obtained with taps, which allow them to be used for a larger wavelength range. Cat. No. and turns Taps taken off at Price LRD 325-3 40 - 100 - 175 $1.50 LRD 750-3 175 - 325 - 550 2.10 LRD 1200-3 325 - 550 - 750 2.70 Inside Diameter of all coils, 1% inches; Width, % inch. Wooden centers for mounting coils per pair $0.25 Murdock Variable .001 for use with above coils $4.75 Radisco B Battery No. 1, $1.40. No. 5, $2.40. Postage extra. 21 Magnolia Terrace E. L. LONG Albany, N. Y. ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 66

Another New Wilcox Switch TYPE 103 Two double blades on one knob, yet carefully insulated from each other. May be used for changing variable condenser from series to parallel with primary, for changing from crystal to audion detector and many similar purposes. 1%” Radius. Polished Brass Finish, 75¢; Nickle Finish, 85c, Postpaid. BUILD YOUR OWN APPARATUS It will not be difficult and your work will have a uniform and —— appearance if you use WILCOX STANDARDIZED A . Our switches have highly polished genuine hard rubber knobs, large brass bearings, shafts and adjustable tension springs. OUR NEW LOOSE LEAF CAT describes our complete line of switches, panels, knobs, binding posts. various parts, etc. Sent for 5c in stamps. RELIABLE DEALERS WANTED OTHER WILCOX SWITCHES TY Not Illustrated) A beautit tandardized switch for genera } n two sizes. 1” Radius, | nish, 40c Nickel finish, 50c 1%” Radius me ish, 50c Nickel finish, 60c 2 (Ilhustrated) A comp ecially suitable for the primary 1%” outside radius. Brass finish : ») Nickel finish $s -ostpaid VARIOMETER PARTS Turned from hardwood. Set as shown consisting of stator (two part), rotor and form for winding coils. Postpaid $2.50 -_ Size of stator 5%” square. Other sizes made to order. SET NO. TWO contains all parts for the variometer THE WILCOX LABORATORIES including the above and knob., scale, pointer, shaft, bind- PT LANSING. H. MICHIGAN ing posts, wire and wereld 95.00 assembly. LTI-FLEX RADIO O west product, Multi-flex Radio Ribbon, is an absolute neces r the efficiency and safety of your radio station. It is wove! ire Lake Superior Copper Wire No. 17 B. & S. gauge with- out si rns; each wire makes a very slight bend every eight inches. It is 1 f continuous wires, not made of scrap or coil ends. ven of wires heavy enough to withstand the weather when used al, lead-in or ground. It is substantial enough to hold its shap* formed into edgewise wound coils for your oscillation trans! lex Radio Ribbon No. 31 is only 7-8 inch wide but has the skin « e capacity of 4.4 inches. We also carry special connectors for t) n. Samples will be mailed on receipt of ten cents. M ex Radio Ribbon is sold only for use in the art of ras nmunication. JENSEN ELECTRIC CO. 1949 HURON STREET, CHICAGO, ILL. CAN W ‘HIP YOU C.O.D. A GENUINE TWO FILAMENT AUDIO TRON VA M TUBE, POSTPAID, $6.00? SATISFACTION GUARANTEED. I under DeForest Pats. Nos. 841387 and 87953 for use in Amateur Radio amplifying audio- fre circuits. ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 67

BLL ILI MMIII IL MMMM ITN LIU LU LLL LLL LLL LLL Thermo-Ammeters, Milliammeters and Current-Squared Meters PA OP e Tee cone UIP Model 425 Miniature Size Instruments for Radio Service are the ideal instrument for the amateur. They are provided as back-connected or front-connected instruments, and can be mounted on small panels or be used as portable instruments. Their characteristics of accuracy, large overload capacity, small current consumption and small size make them particu- larly desirable for use on amateur and other low-power outfits. Complete information will be furnished upon request. Weston Electrical Instrument Company 158 Weston Avenue, Newark, N. J. Branches in all Principal Cities. z = = = Z : TL mn mm mm mmm nn MMMM ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS fr)

Page 68

IT TALKS FOR ITSELF Do You Need a Good Detector ? Here is Your Ideal. Use it in Your Regenerative Circuits. Get Thunder- bolt Radio Telegraph and Telephone Sigs. Tracolite Insulation Panel. Beautiful Mahogany Finished Cabinet. Including a High Grade Traco “B” Battery. THE RADIO APPARATUS COMPANY POTTSTOWN, PENNA., U. S. A. BUNNELL "aes Reliable THE JOVE DETECTOR HANDIEST, HANDSOMEST AND BEST Sample by Mail, $1.80 Tested Galena Crystal 25c. Ghegan Patent) Bunnel! Keys, Transformers, Condensers, Spark-Gaps, Receivers, etc. are High Grade but Inexpensive. Send Stamp for New Edition, 42 Q Catalog. J. H. BUNNELL & CO. 32 Park Place, New York Stetetets’ ? BIG 300 PP. D U C K Wireless and Electrical Catalog Is now as it always has been, the largest and most complete and dependable Wireless Catalog published. Mailed for 12c. in stamps or coin which may be deducted on first order of one dollar. Catalog not sent otherwise. This catalog costs us twice the price of other catalogs. Everything wireless worth while is listed in this catalog. The experierced amateur will tell you to se stalogue before buying. You are thereby insured against an unwise purchase. It is the Beacon Light to guide you right in the selection of your wireless apparatus. No bigger or better va re obtainable elsewhere. Send for revised price list. It is yours for the asking. THE WILLIAM B. DUCK CO. 243-245 Superior St., Toledo, Ohio ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 69

aay , PLOT ICE . | ‘4 ft. = 4) ? i i u ill pi AUTON Have You Kept Pace With The Times? Are you still operating the old style non-sensitive, poorly designed receiving apparatus? Or are you equipped with one of the new com- plete Gilbert Radio Outfits designed by an expert who was a Radio Officer in the U. S. Army during the war and who has incorporated all of the latest Army improvements in these new outfits. Gilbert Radio Outfits are complete in every respect for trans- mitting, receiving or both. They are without doubt the latest and most scientific outfits. Each piece of apparatus is designed to operate in close harmony with every other part of the set. The Loose Coupler used in the receiving sets is not the old Obsolete type that pulls out of the box but the new enclosed panel type. A highly sensitive instrument designed particularly to minimize distri- buted capacity and to eliminate dead-end losses. It is a very compact instrument in a quartered oak cabinet and is included in all Gilbert Radio Receiving Outfits. These outfits can be purchased complete or each part separately. Our new Radio catalog No. 50 describes each one in detail. Write for it today. | Ss THE A. C. GILBERT COMPANY 317 Blatchley Ave., New Haven, Conn. IN CANADA THE A. C. GILBERT-MENZIES CO., Limited Toronto ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 70

MURDOCK NO. 55 M DOUBLE SET $4.50 iM DOUBLE SET $5.50 long and rvice in tions where their le and sensitive makes them the those who OOD ’phones. OUR SET NOW— out thoroughly. /ESN’T SUIT, SEND K AND GET YOUR MONEY shows a splendid ype of apparatus Send for a copy. |. MURDOCK CO. 5 Carter St. SEA MASS. SAN FRANCISCO, CALIF SPECIAL BARGAIN Genuine GENERAL RADIO hot-wire radiation meters. Ranges 0-2 and 0-24 amps. Regular list price $10.00—our price $5.00 each. Our Latest type loose-coupler with seif-supporting bank wound secondary range 180-3000 meters with- out condensers. The same high quality material and workmanship at the same old price of $18.00 2nd edition Consolidated Radio Call Books $1.00 ea. 2 ee TeCo AudioTron Adapter $1.75 Our $25.00 2 step amplifier to go up soon. Get yours now. We have a new socket with positive contacts. $1.00 Postpaid A NEW FILAMENT RHEOSTAT RUGGED—COMPACT—GOOD LOOKING 6 OHM Resistance—2',” dia. Made of heat-proof condensite, for back or front mounting, $1.75 postpaid. RADIO EQUIPMENT CO. 630 WASHINGTON STREET BOSTON, MASS. SERVICE PROMPT SHIPMENTS ——— —_—_— ORDER from any of the following catalogues—DeForest, Murdock, Acme, General Radio, Bunnell, Thordarson, Clapp-Eastham, Weston Elec. Inst. Co., Wireless Press. __ JAMES W. POOLE, Inc. 64 Kingston St., Boston, Mass. Established 1887 ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 71

Fitiinate That Noise Get That Long Distance Kick With the BENWOOD SILENT ROTARY Combines all the advantages of large sparking surface wonderful quenching quali- ties straight edge electrodes and a beautiful clear tone, USED BY 8ER, 9CA, 9HW, 9BR, 9KV, 9LC, 9ZJ and many others that are heard every night. BeENWUOD GAP-OPEN Absolutely Airtight Practically Noiseless Cannot be heard outside of the room it is operated in. Bakelite Insulated Pulley driven or direct coupled to any motor. Price with 8-10 or 14 point disc - $27.50 Discs Separate . BENWOOD GAP-CLOSED BENWOOD SP ECIALTY | ¥ C0, 3 3424 Olive St., St. Louis, Mo. ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 72

—} = ee ee ee ee ee ee TMM Man LETT HUDHTATE “MODERN” AMPLIFIERS (IMPROVED MULTI-AUDI-FONE) e-Step Amplifier. Two-Step Amplifier and Horn. nplifier for all. Case is of moulded bakelite and all metal parts are specially ted. The interior construction is of the best. All insulated parts are of iry cell is used with the one-step amplifier at a cost of about 5¢ a month and only e Two-Step at a cost of about 12c a month. Batteries last from 7 to 12 months. p amplifier is equipped with a loud speaking horn which shouts the signals out Horns can be had for the one-step amplifiers also. amplifiers can be had at all “Modern” agencies at— NE-STEP AMPLIFIER less headset .....- - + + + $18.00 ud Speaking Horn for one-step i 12.50 WO-STEP AMPLIFIER WITH “Loup” SPEAKING HORN . . 75.00 Bulletin Al describes fully our amplifiers etc. MODERN RADIO EQUIPMENT COMPANY 27 So. Broad St., Elizabeth, N. J. . iit 0c HUOVNEULASUOOAONEOOUAANAN NANA LOAEROUOOALUUOAALEE AAA LAONOLOUOUOEOOUGOOOEnOOTESOOOOOONAEOOOOSD MANOS EUEAEOU UENO OAR =| This is the most convenient device on the market for using a tubular bulb in a standard socket. Dealers write for price schedule. PRICE $1.50 POSTPAID. THE RADIO ELECTRIC COMPANY 4614 HENRY STREET PITTSBURGH, PA. “ We make or sell everything Radio” S TANDARD—-WHEREVER “BP BATTERIES ARE USED. FFICIENT use by leading turers, dealers onstitutes their ‘e is the “VARI- ANDARD VT hich will interest the use of the _ Single cell vari- lished by mere- Pacent Electric Co., Sole Eastern Saks 150 Nassau Street, New York City, N. Y. MAXIMUM OPERATING LIFE ly inserting a resilient brass plug into receptacles on the top of the battery. It is truly a convenient and efficient vari- able voltage battery. Send for descriptive literature, and give us your dealer’s name if he doesn’t handle STAND- ARD VT BATTERIES. RICHTER & BYRNE, New York Manufacturers ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 73

RADIO APPARATUS Distributors of reliable experimental and Laboratory Radio apparatus for High Schools, Colleges and individuals Grebe Vacuum-tube detector and two-stage audio-frequency amplifier Type RORF Grebe Detector and two-stage amplifier. . $65.00 Shipping weight 14 lbs. Type RORB Grebe Two-stage amplifier with cam-switch control Shipping weight 11 Ibs. Type RORE Grebe Single stage amplifier Shipping weight 6 lbs. Type RORH Grebe Vacuum-tube unit (Audion control panel) with 40 volt “B” Battery Shipping weight 15 lbs. Type RORA Grebe Vacuum-tube unit (Audion control panel) without “B” Battery Shipping weight 9 Ibs. Type CR-3 Latest Grebe Receiver Wiring diagrams and instructions accompany each unit. SPECIFICATIONS Panel: Bakelite Dilecto, hand rubbed finish. Cabinet: Quarter- ed Oak, weathered oak finish, with hinged top. Vacuum tube sockets: Standard, four prong type. Amplifying Transformers: Closed core type designed for highest efficiency. Filament and circuit control: Grebe telephone jack and plug system. Wiring: Grebe standard bus wiring. Binding Posts: Grebe standard with bevelled gripping edges. Nomenclature: Finest pantograph engraving. Immediate delivery! Send us your orders at once. Exclusive distributors in New England for A. H. Grebe & Co. Dealers will find it profitable to stock this reliable high-grade apparatus. Send 6 cents for new catalog. F. D. PITTS CO., INC. 12 PARK SQUARE, Dept. A, BOSTON, MASS. ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 74

“SHRAMCO” MAKE R SET UP-TO-DATE AND EFFICIENT. OUR PARTS AND I MENTS ARE STANDARD. NEW CATALOG H CON- TAINS ‘LETE LINE, INCLUDING MATERIAL LISTED BELOW, NECES FOR A MODERN WIRELESS STATION. Styles Switch Points, Plugs and Jacks ss and Nickel KD Variable Condensers ypes Composition Knobs “B” Batteries | Binding Posts and Switches “Radisco” Coils er Terminals Switches Indicators Meters » and Threaded Brass Rod VT Tubes and Sockets ps today for your copy and we will place your name on mailing list for tins without charge. SHOTTON RADIO MFG. CO., P.O. Box 3, Scranton, Pa. BRANCH: 8 Kingsbury St., JAMESTOWN, N. Y. FOR CLEAR RECEIVING |,5°3- THE SATI SFACTORY SEVERAL BURGESS BATTERY COMPANY HARRIS TRUST GLDG. CHICAGO AMATEURS! Here is a Regenerative Re- ceiver that can't be beat. Price is very reasonable for the re- sults obtained. All of the long distance amateurs come in very QSA. Shipment can be made in two weeks. Williams Radio Supply Co., Successors to Gerkey- Williams Co, $46.00. Shipping Weight 21 lbs. 905 Monroe St., N.W., Washington, D.C. ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 75

Hook ’er to yer bulb any single wire aerial 25x40 feet will do anywhere. A C/W-20000 meter tuner for only $8.00. Wound with the celebrated INVOLUTE coils. The only tuner in the world for amateur use, licensed under the Marconi Patent No. 763772, that gets all the European stations with one bulb and one wire aerial anywhere, using no tickler coil. No movable coils, no loose connections, no trouble. Condensers help the tuning but are not needed to get the arc stations. Only one tuner of each kind sold at this price in each city. Act quick and if you are the second or third we will give the names of those ahead of you. WE SELL THE COILS SEPARATELY FOR PANELS. Coils for any of our tuners boxed in small container, waxed, tapped, marked and with wiring diagram, for only $6.00. THIS OFFER HOLDS GOOD FOR MARCH ONLY. Now throw all your troublesome basket full of funny-wound coils in the heap and close your panel up after installing our water, dust, and fool-proof coils. Our tuners are in use in Alaska, Honolulu, Porto Rico, Cuba, Mexico, Canada, and REKJAVIK, ICELAND. NAA tuner and 200M regenerative tuners at the same low price. One to each city. The second order will cost $10.00, third $12.50, and the rest $15.00, our regular selling price. Our Arlington tuner is the only one made that gets and holds NAA all year round. Static is nearly all absorbed by the wax we use. Our 200M tuner has help- ed us to work a ship at sea 1300 miles from here and the air sounds like a nest of bees when using it—but you can get very selective tuning. PANEL MOUNTING RHEOSTAT only $1.50. A high grade combination switch and rheostat with formica disc, having an auto- matic stop that absolutely prevents burning - out the filament accidentally. ALL PRO- retil a MAMAN AALEM TD DPR ia Tikit \ DUCTS LICENSED BY THE RADIO CORP. of AMERICA. a PERFECTION BINDING POSTS. te Use them on your panels, nickel plated 6 f for $0.75—$1.25 doz. Every dealer in the country of any importance handles our goods. KNOCKED DOWN CONDENSERS. Assemble and save money. 41 plate-$2.75; 21-$2.25; 11-$1.75. Made by Perfection Radio Laboratory, Clinton. Sold only by TRESCO, Davenport, lowa OR THEIR DEALERS. ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 76

AAA AAA AS A AAA SSS Sy S SMA SAA ASA © A ile INEna oul TRANSFORMER Type TXL-101 A Price $16.75 f. o. b. Factory A standard Transformer modified and redesigned for amateur use. Coils are 1/16” copper, edgewise wound on bakelite supports. Assembly secured to end plate by bakelite nuts. Secondary slides on bakelite rods. This elimination of metal through- out results in maximum efficiency. PRIMARY INDUCTANCE 8 micro henrys SECONDARY INDUCTANCE 44 micro henrys The Transformer illustrated above is only one of many newly designed radio specialties which we have ready for you. Write us for descriptive bulletins which are being issued covering all International Radio Products. Address Department No. 23. , ddd ddd dddddddiliahatddddddadéaddidiadidddadiddddddiddissdtda international Radio Telegraph Co., Newyork city PAPO MOAN = ee. - ~ SSS NM WAMAMBAIHN SIT =~ VACUUM TUBES REPAIRED ' We re] he filaments and other elements in all types of vacuum tubes and g e them to operate equally as well as a new tube. In most cases t perate better. We produce wonderful oscillators, detectors and a! MARCONI VT DE FOREST VT MOORHEAD TUBES WESTERN ELECTRIC REPAIRED AT FOUR DOLLARS AND FIFTY CENTS EACH. ELECTRON RELAYS OSCILLAUDIONS AND ALL OTHER TUBULAR TYPES REPAIRED AT FOUR DOLLARS EACH. All fo. made receiving tubes repaired at SIX FIFTY and power tubes d nding upon size. WE HAVE PURCHASED A LARGE QUANTITY OF BURNED OUT MARCONI VTs AND ELECTRON RELAYS WHICH WE OFFER FOR SALE AT FIVE DOLLARS. REMEMBER THESE TUBES ARE GUARANTEED GOOD AS NEW. DEALERS WRITE US THE VACUUM TUBE REPAIR COMPANY 511 Perry Building OAKLAND, CALIFORNIA. | ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS ! | h

Page 77

899 BOYLSTON ST. INSTITU BOSTON, MASS. RADA Learn Wireless !!! Under former U. S. Government and Marconi Experts; men who have spent years in the SUCCESSFUL training of THOUSANDS of Wireless operators. OUR GRADUATES now in all parts of the world as Instructors, Radio Inspectors, Engineers, Operators, etc., etc. Interesting and fascinating work! Splendid opportunities now in the Merchant Marine! For years the EASTERN RADIO INSTITUTE has trained Wireless operators, placing them in good positions on land and sea. In that time they have placed every graduate and have kept them employed. Moreover, every graduate is NOW guaranteed a good position operating on ships sailing to all parts of the world. When you realize that our Day or Evening school prepares you quickly and efficiently for position paying from $100 to $150 per month, food and quarters included, and that the entire expense of the course can be more than returned to you in one month’s salary, does not this appeal to you? REMEMBER: We are the OLDEST, LARGEST, and BEST EQUIPPED school of its kind and already have THOUSANDS of satisfied graduates to our credit. LAST YEAR ALONE WE GAVE INSTRUCTION TO MORE STUDENTS THAN ALL OTHER SCHOOLS IN NEW ENGLAND COMBINED!! THIS SPEAKS FOR ITSELF. OUR YEARS OF EXPERIENCE AND RESULTS ARE AT YOUR DISPOSAL. _ Send in your enroll- ment today. DAY AND EVENING CLASSES. ADVANCED CLASSES IN RADIO THEORY OR CODE. SPECIAL AMATEUR CLASSES. Start any Monday. Our prospectus for the asking. ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 78

The Latedl Pee Control Cabinet | compact and highly efficient unit that may be used with any and all Price, $17.00 Without Tube Aud Control Cabinet ype RORH contai1 | condenser, grid leak, filament rheostat and two 20-volt dry batteries. Socket lates the standard 4-prong tube. There are binding posts for second r, phones and filament battery. | | | | | | | nd simple connections may be made to all types of receivers. tin R-117 describes this unit. Complete ectangee 10 cents. A. H. GREBE & CO., Inc., 74 Van Wyck Blvd., Richmond Hill, N. Y. YOU CAN BECOME A WIRELESS OPERATOR IN FOUR MONTHS turning out qualified men every week in this time, who earn from $100 to $150 per od and quarters. When you stop to consider that every additional month spent in suivalent loss of $200 to you, economy should suggest your taking a course at this t of tuition will be more than returned to you in your first month's salary a complete 500 cycle Marconi ship installation. Theory under direct supervision Radio Inspector, Dept. of Commerce. Daily practice on Omnigraph. Positions »» and terms reasonable. No entrance fee. Write, phone or call for literature. teach Telegraphy. MASSACHUSETTS RADIO & TELEGRAPH SCHOOL. 18 Boyls treet, Telephone Beach 7168, Boston, 11, Mass. ARTHUR HELLER (Lt.) R. F. TROP G. R. ENTWISTLE | | Tt ie Largest Radio Sunely. Stock In The South COMMERCIAL AND AMATEUR WIRELESS APPARATUS OF ALL KINDS Holl ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 79

IMMEDIATE DELIVERY Western Electric V T-2 POWER TUBES PRICE $18.00 For measurements in a laboratory these tubes are unequalled by any others. They are the only tubes having oxide-coated filaments, insuring greatest emission of electrons and longest filament life. They are sold only for uses other than the transmission or reception of messages. Rawson Electrical Instrument Co. CAMBRIDGE, 39, MASS. “JUPITER” aeRrat wire One year of experimenting has produced a stranded copper wire, ideal for aerials, drawn for the particular requirements of the Aerial Radiator.. .Com- posed of seven strands of full size No. 22 solid copper. Very strong and 100% Radiation. Large surface and low high-frequency skin resistance. Special Price 1 Cent roor $9.00 THOUSAND Shipping weight, 15 Ibs. per 1000 ft. Send postage. No C.O.D’s. Immediate delivery anywhere. LEE A. BATES, itt" 8 Moen St., Worcester, Mass. GALENA Unmounted Navy Regulation Size Guaranteed 25c Each Postpaid 5 for $1.00 My vast practice in all detector minerals enables the Amateur to come in direct con- tact with Real Galena. This material is personally selected at the mines, every piece cut and tested out on Arlington Signals. Former mineral cutter and selector for the Wireless Specialty Apparatus Co. Fusible Metal Sufficient Quantity for Mounting 25c 27 Oakland Ave., R. BROWNLIE Everett, Mass. ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS 77

Page 80

mu 20000 NEE A= A WARNING to Manufacturers Agents Importers Amateurs Dealers Purchasers Jobbers Users of VACUUM TUBES The Marconi V.T. Patent is Basic United States Letters Patent to Fleming, No. 803,684, November 7, 1905, has been held to be valid by Judge Mayer of the United States District Court for the Southern District of New York, and by the United States Circuit Court of Appeals for the Second Circuit. It is a basic patent and controls broadly all vacuum tubes used as detectors, amplifiers or oscillions in radio work. No one is authorized to make, sell, import or use such 803,684 tubes for radio purposes, other than the owners of the 57-879,582 »atent and licensees thereunder. Any others making, or using them alone or in combination with other devices, infringe patent and are liable to a suit for injunction, damages and profits. prosecuted. — AUDIOTRON AND THE LIBERTY VALVE ARE NOT LICENSED UNDER THE FLEMING PATENT The p: of the genuine Marconi Do not take chances by making, V.T. delivered is $7.00 each. importing, selling, purchasing or ; . using vacuum tubes for radio The standardized socket is $1.50 purposes not licensed under the addition The standard resist- Fleming patent. By selling, pur- ance, complete, costs $1.00 and is rg ay using licensed tubes * | : Ra or radio purposes you secure made it following sizes: protection under the Fleming megohm, 1 megohm, 2 megohms, patent and avoid the risk of liti- 4 megohms, 6 megohms. gation for infringement thereof. This warning is given so that the trade and public may know the facts and be governed accordingly. | remittances with order to COMMERCIAL DEPARTMENT RADIO CORPORATION OF AMERICA MARCONI WIRELESS TELEGRAPH CO. OF AMERICA 227 Broadway New York e Distribators for De Forest Radio Telephone & Telegraph Co. Retail Office and Exhibition Rooms, 25 Elm St., New York Schofield B leveland, Ohio 136 Federal =, poe Boston, Mass. American Baltimore, Ma 301 Commerc n Philodelphin Fe. Orleans, La. Insurance FE» Bidg., San Francisco, Cal. 108 South 2nd St., Philadelp uaa svn © 11 TTEUUEESUERSASSEDCEREET TOPE ERR 78 ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS Mie = — = => = = = — => = = => = = a => = = E => => = > = = => = => = => = => = = = = = = = = => = = = = = => => = = = = => = = = = => = = = = = => = = F«AMQQNNNN00UOLDEOLULUUELEEOOOEOLEOONLO}OOOOOOOUOO OLA TULANE

Page 81

Licensed by DeForest AUDIOTRON The Original Tubular Vacuum Amplifier The AudioTron vacuum tube is now manu- factured and sold as a genuine audion licensed under DeForest Patents Nos. 841387 and 879532 to be used only for amplification in radio com- munication and only for experimental and amateur purposes and only in audio frequency circuits. The Audiotron has a double filament of special thorium tungsten and the operating life is over 2000 hours. No special socket is required. The electrical and mechanical dimensions result in a heavy plate cur- rent and corresponding signal strength. Plate voltage under 40. Our guaranty insures satisfaction. PRICE $6.00 EACH If your local dealer cannot supply you we will ship postpaid when cash accompanies order. The AudioTron Exclusive Guaranty: Each and every Audiotron is guaranteed to arrive in good condition and to prove fully satisfactory. Replacement of unsatisfactory tubes will be made free of charge. AUDIOTRON AUDIO-FREQUENCY TRANSFORMER Laminated closed core, two coil type. DEALERS:—Write for our attractive trade Proposition. AUDIOTRON SALES CO. Lick Bldg., San Francisco, Calif. ALWAYS MENTION QST WHEN WRITING TO ADVERTISERS

Page 82

Telemegafone ficient Telephone Receiver and Loud Speaker The most rugged, simple and reliable instrument yet pro- duced for the reproduction of radio signals and sound. It is not only a most sensi- tive receiver when used with the head-set, but is also the most powerful loud speaker. The Magnavox Telemegafone fills the long felt need of both commercialand amateur radio stations. By using this instrument in connection with your vacuum tube amplifier, signals will be reproduced with great vol- ume. For weak and ordinary signals use the head-set. Strong signals can be heard a great distance from the horn. PRICE $75.00 ur receiving set where your present ead-set is connected BB to a 6-volt storage battery Delivery—Order Eariy 759 East Fourteenth Street, Oakland, Cali fornia ALWAYS MENTION QST WHEN WRITING TO ADVERTISER>