QST 1915-12: Vol 1 Iss 1

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The American Radio Relay League =) yy eS SS Ss ae t= FOR THE MONTH OF DECEMBER NINETEEN HUNDRED AND FIFTEEN SSS SS 8 S880 (FORTIETH ANNIVERSARY REPRODUCTION, DECEMBER 1955)

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Two New Bunnell Specialties The Straight Line Renewable Contact Radio Hey By far the BEST and HANDSOMEST trans- mitter yet produced. Not only are the contacts renew- able, but they are kept in a straight line with perfect surface contact until completely work out, and the lever remains in its original horizontal position. Fading signals caused by varying resistance of con- tact points are entirely eliminated. Its binding posts automatically clamp the wires, making loose connections impossible. Net Price, $7.50 Send for descriptive circular. The Jove Detector Holder st perfect of crystal holders. e or two different crystals of t once without the use of a clamp- nsitive point of either crystal quickly found, the correct pressure held without moving a single screw or nut. fully finished and mounted on dark glazed porcelain. Net Price, $1.00 SEND FOR OUR NO. 36 WIRELESS CATALOG ——_ J. H. Bunnell @ Co., Incorporated 32 Park Place— Broadway Block New York

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DECEMBER, 1915 Q S | NUMBER 1 CONTENTS. December Radio Relay Bulletin Our Services Offered to Government Reliability and Celerity Regular Hours for Listening Radio Station of W. H. Carroll, Illustrated List of Stations Book Official League License Application for Membership Special Licenses First Issue of QST Nr. 1 Relay Station &. B. E., Illustrated Book Review Pictured Electro-Magnetic Waves, Illustrated By Clarence D. Tuska, Asso. I. R. E. Radio Station of Roy C. Burr, Illustrated Subscription Blank Latest List of Additions to League List of Stations List of Abbreviations used in Communication by Amateurs Detail of Roy C. Burr’s Sending Set, Illustrated Application Blank Arlington Notes Issued by Hiram Percy Maxim and Clarence D. Tuska Hartford, Conn

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ANNOUNCEMENT € Q S T is published by and at the expense of Hiram Percy Maxim and Clarence D. Tuska. € Its object is to help maintain the organization of the American Radio Relay League and to keep the Amateur Wireless Op- erators of the country in constant touch with each other. € Every Amateur will help himself and help his fellows by sending in 25 cents for a three months’ trial subscription. THE PUBLISHERS OF QST

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December Radio Relay Bulletin SEASON OPENING. The cool weather has arrived, “ static” is getting better every night, and the own- ers of relay stations are returning to their instruments. It is time to send out another official QST from headquarters. There is much to tell not only our membership, but also every amateur in the country. First of all, we are confronted with ex- tremely serious national questions. Our country has never before faced a more se- rious situation. National defense has be- come a question which every American realizes concerns him personally. The President is preparing plans and the Army and the Navy are both studying carefully every phase of the problem. One of the most important factors is Radio Communi- cation. The great possibilities of the Amer- ican Radio Relay League, with its organiza- tion of over six hundred relay stations in nearly every state of the Union are bound to attract prominent attention. The direc- tors of the League have anticipated this, as will be noted on another page. Of equal importance is the matter of RELIABILITY and CELEBRITY, as far as the transmission of messages by the League is concerned. We have had a year’s experi- ence and we have learned many things. We have found our membership enthusiastic and willing but we have not been efficient always in getting messages through. The directors have something to say on this point, which the membership should care- fully note. The matter of frequent issue of Bulle- tins to the membership has been something which has been given thought, and every amateur should think carefully about what the Directors say about this important sub- ject. N NATIONAL DEFENCE. OUR SERVICES OFFERED TO GOVERNMENT. When it became evident that our gov- ernment intended to seriously take up the question of improving our national defense, the following letter was prepared and sent to the Secretary of the Navy:— Secretary of the Navy, Washington, D. C. Sir:— In connection with your plans for national defense, it may be that the organization of the AMERICAN RADIO RELAY LEAGUE, INC. will be of service. We respectfully present the following information concern- ing this League. It has been in operation one year. Its membership consists of over six hundred amateur radio stations in thirty-eight states of the Union. Except for gaps in the southern tier of states, we are able to com- municate to all important points at the pres- ent time. A list of our official relay stations is given in the enclosed “LIST OF STATIONS.” There are over two hundred additional sta- tions which have been appointed and which are awaiting publication of the third edi- tion of our List. The development of this League of ama- teur wireless telegraph stations has been carried on under the full knowledge of the Bureau of Navigation, Department of Com- merce. Frequent conferences are held be- tween our Chairman and the Commissioner of Navigation, and his assisting District Radio Inspectors. The League is managed strictly in accordance with a spirit of co-operation with Government authority. Our influence in correcting small technical infractions of the radio laws has already been successfully exercised in several in- stances. In order to insure transmission along trunk line routes, the Bureau of Navigation have issued to certain stations indicated by this League, a Special License to use a transmitting wave length of 425 meters. The regular amateur is limited to 200 meters. Several of the Special, Licenses have already been issued where the geo- graphical location suggests their value. During the next sixty days, we hope that several new Special Licenses will be issued to stations in the Middle and Far West, which will be of great assistance to us in reaching Pacific Coast points with certainty and despatch.

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4 QST Tl n Radio Relay League is pure mateur organization. The ex- char ery of messages is abso- te mentary, and no consideration of a message is allowed mstances. Regular radio teleg ethods are employed. A m} ficial message blank is en- The hip consists of middle-aged mer men, and boys. There are mat ilth in the membership, and wl ( telegraphy a form of recré lany of our stations have had no ¢ ed upon them, and are equip} than most commercial sta- i cement of the League is in the | ness men. The writer is the f hairman. Sor tations have already been of 1 in establishing communi- cat loods have prostrated the reg and telephone lines. Our orgal nquestionably be of value in the milar disasters or invasion. A fire ppened to destroy the tele- phone ph central stations in a city v ommunication. Our or- gar this interval while re- pair Most of our membership is alot and the Pacific Coasts, It is 1 le that we might be of value t t standing off our coast in time We r y offer the services of our orgal its facilities. Respectfully, THI LICAN RADIO RELAY EAGUE, INC. HPM:P RAM PERCY MAXIM, Chairman. \ In re to this, we received from Secret the following :— Mr. H Maxim, Chair1 erican Radio Relay League, H nnecticut. Si I bes viedge your interesting letter of ith with inclosures, and to ex] eciation of your patriotic offer of of the League in con- yal defense. nectior The | t has a plan outlined for the em} the services of amateur statior war as may best serve the int country and the Office of the S endent of the Naval Radio Servics mediate charge of matters relative rdination of means of radio so far as the Navy is conce the event that the neces- sity aris¢ trolling and using stations other th inder naval jurisdiction. I should rlad to have you address the 1f Radio Service direct on Superinter December, 1915 this matter, stating as fully as possible what facilities in the way of personal and material you may have available and giv- ing in as much detail as is possible the character of the organization, especially as to the method employed for the interior control of the amateur stations constituting the League. Very respectfully, JOSEPHUS DANIELS. \ Upon receipt of this letter, we sent full information to the Superintendent of the Naval Radio Service, and he now has a list of all of our stations and will no doubt take them into consideration in planning Radio Communication from ships to shore. It is easy to imagine the importance of some of our coast relay stations in the event of anything happening to any of our big naval coastal stations or in the event of a warship wanting to communicate with low power so as not to be “overheard.” ‘\ A similar letter was written to the Sec- retary of War as follows:— Secretary of War, Washington, D. C. Sir:— In connection with your reported pros- pective program for increased National de- fense, your attention is respectfully di- rected to the existing organization of ama- teur wireless telegraph stations, known as The American Radio Relay League, Inc. This League has been in working order one year. It has over six hundred actual radio stations in thirty-eight states of the Union. Except for certain gaps in the south, it is at present possible to transmit messages from coast to coast, and from points in Canada to points as far south as Atlanta on the east, and Los Angeles on the west by several routes. A list of these stations appears in our official “LIST OF STATIONS,” copy of sec- ond edition of which is enclosed herewith. It may be that a record of these stations and the additional stations, which are awaiting publication in the third edition, may be of value to the War Department in any defensive program. The building up of this League has been carried on with the full knowledge of the 3ureau of Navigation, Department of Com- merce. Frequent conferences are held with the Commissioner of Navigation, and his assisting District Radio Inspectors. This has maintained the League on a proper legal and official plane, and insured avoiding in- terference with Government and Commer- cial Radio work. In order to insure relay work over iung yaps, the Bureau of Naviga- tion have issued Special Licenses to cer- tain stations indicated by this League. This

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December, 1915 Special License gives permission to use a wave length of 425 meters when conducting long distance relay work. Already several of these licenses have been issued to the better class of amateur stations, whose geographical location is such as to assist in trunk line relay work. Several new stations in the Middle and Far West, will probably be appointed in the next sixty days and communication with the Pacific Coast will be certain and quick. This League is a purely amateur organi- zation. The exchange and delivery of mes- sages is purely complimentary. A regular radio telegraphic methods and systems are employed, however. A sample of our official message blank is enclosed. Many of our stations have already been of service in establishing communication when flood has prostrated the telegraph and telephone lines. We believe we can be of service to the country under many con- ditions similar to flood, such as fire or the wrecking of the telephone and telegraph central stations in any city or town. Our membership is rapidly growing and we un- questionably will be in touch with a large proportion of most of the states of the Union by this time next year. Many of our stations are owned by men of wealth who have not hesitated at any expense in equipping themselves with the best ap- paratus obtainable. There are many mem- bers who are young men, and a few who are distinctly boys. The management of the League is in the hands of men. The writer is its founder. If we can be of any service to our coun- try, we shall be glad to serve in any capac- ity requested. We offer to you our complete organization and facilities. Respectfully, THE AMERICAN RADIO RELAY LEAGUE, INC. HPM:P Chairman. ‘\ This brought the following response from the U. S. Signal Corps:— From: Office Chief Signal Officer. To: Hiram Percy Maxim, Chairman, Ameri- can Radio Relay League, Hartford, Conn. Subject: Radio communication. 1. In reply to your letter of August 7, 1915, addressed to the Secretary of War and which has been referred to this office, you are advised that the Signal Corps is pleased to receive the information contained in your letter, also the list of stations operated by the American Radio Relay League. 2. Should at any time it be found that these stations will be of service to the War Department, you will be further communi- cated with. SAMUEL REBER, Lieut. Col., Signal Corps, Acting Chief Signal Officer. QST 5 From this it is evident that for land or interior service we would come in contact with the Signal Corps if the Government decided to avail itself of our assistance in time of war. In times of peace we also have confront- ing us sudden disasters, such as flood, fire or strike. Dayton, Ohio was an example of a disastrous flood, which destroyed tele- graphic and telephonic communications, and made it possible for the amateur wireless operator to render invaluable help. A fire which destroyed the central station of the telegraph and telephone Companies in a city, would also place that city in a very dangerous situation. The amateur wireless station would be the first place looked to in such an emergency. To sum up, the organization of our League, in efficient working form is a work which is of national importance, and we may have the knowledge that it represents a patriotic and a dignified effort. 7 RELIABILITY AND CELERITY. The words of the Radio Inspector of the First District, Mr. H. C. Gawler cover this point as well as it can be put. Mr. Gawler said:—‘It seems to me your work is pretty well cut out for you and is very clearly defined. The value of this organization would depend entirely on the volume of business which could be handled by your stations in a PRECISE, ORDERLY and EF- FICIENT manner. Few realize the amount of work involved in bringing this condi- tion about, and it is my opinion the more local aid you can enlist on your side, the bet- ter the results will be. It is not sufficient to have stations which merely could trans- mit and receive messages over certain dis- tances, but THEY MUST CONTINUALLY DO SO IN ORDER TO ASSURE GOOD COMMUNICATION BETWEEN THESE POINTS WHEN NECESSITY WOULD REQUIRE.” \ No one realizes the truth of the above better than those of our members who have handled any quantity of messages during the past year. Unless we can have some- thing approaching RELIABILITY and CER- TAINTY, all the hard work and money spent in getting our organization together is wasted. We must not let this good work go to waste. The hardest part was done when we got over 600 stations together. It only remains now to perfect some sys- tem whereby we can always be fairly sure of getting through. The Directors have given this a lot of hard study ever since last spring. This is what we have finally arrived at, and although it may not be per- fect, yet we want every station to follow the spirit of the idea even though they cannot follow it to the letter.

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REGUI HOURS FOR LISTENING. Our t difficulty in getting mes- sag because the other fellow is not Most of the stalling of mes- sage this one thing. What we must e regularly established and definit t which we will be on duty. Ther n Northampton has a mes- sage t and he knows just when the st suffalo or Waynesfield or ne e, is working he can work witl \s it is, he tries at any old less the other man is a res hawk and sits up half the night t in the week, he misses hin T etter, it is suggested that ¢ end out a QST followed QST December, 1915 by a QRU with his town or city at a definite hour every evening. This will indi- cate that this station is ready for anything coming his way. An example of what the plan is may be taken from the way we have begun to work it at headquarters. Between 8:45 and 9:15 p. m. every night, one of the Hartford sta- tions sends out the following at full power: QST QST QST de IZT QR Hartford ? QRU Hartford ? QRU Hart- ford ? de IZT .—.—.-—-. , This makes it known that Hartford. Connecticut, is ready to receive any mes- sages for or via it. If all other cities would agree among themselves to carry out this same plan, it would help get messages through without a doubt. ; ee ’ _ SapRADIO STATION, WA, H. CARROLL. =e ST, LOUIS, Mo, One of the best equipped Stations in the League THE LI kr STATIONS BOOK AND THE OF! LEAGUE LICENSE. Anot mportant factor in se- curing mission is the LIST OF STA This book must be at han nstant reference at any moment hundred stations are listed it ind it is the one which the Go | use in attempting to work mateur station in case help we Che book was distributed among ons late in the spring. The sum? came before many mem- bers h EVERY MEMBER OF THE \ND EVERY AMATEUR WHO H \TION OR EXPECTS TO HAVE 0} GHT TO ORDER THIS BOOK \TELY. It gives all the latest of relay stations, their address, the name of the owner and oper- ator, his transmitting power, what kind of a spark gap he has, how far he can send, the numer of words per minute he can receive. his usual listening in time, what kind of a license he holds from the Government, ani whether or not he has a telephone near at hand for delivering or receiving local mes- sages. The book also contains a lot of ex- tremely interesting letters from amateurs who are operating and covering long dis- tances. The book is sent to any one whether a member of the League or not, upon receipt of fifty cents in stamps or otherwise, which just covers the cost of printing and dis- tributing. Every one reading these lines is not doing his share unless he gets this book. If you have not sent in your order already, you ought to attend to it today.

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December, 1915 OFFICIAL LEAGUE LICENSE. Arother important matter which will as- sist materially is the ordering of the offi- cial license certificate for Licensed Relay Stations. This certificate is issued only to members of the American Radio Relay Lea- gue who have qualified as owning and oper- ating a practical radio relay station. The certificate is similar to the United States Government certificate, and makes a digni- fied document which any radio operato) might well be proud of. It is sent upon paying the license fee of fifty cents, pro- vided of course the applicant is a member of the League. If you have not obtained your License, you ought to order it at once so as to have it framed and hanging up in your operating room when the time comes that you want your station to look well. Send a dollar, and we will send your Book, package of Official Message Blanks and your License all at the same time. ‘\ APPLICATION FOR MEMBERSHIP. Any owner of a wireless station may be- come a member of the American Radio Relay League by filling in an application blank and sending it in to headquarters for consideration. If the application blank in dicates that the operator has a practical working station, and can receive a message, he is made a member. No money is charg- ed, as the League is not a money making scheme in any sense of the word. Its single aim is to organize the different amateur wireless telegraph stations of the United States of America, so that we can relay messages between each other and thus reach any part of the country. The only money that is asked for, is to pay for the List of Stations book, and the License Cer- tificate which are charged at what they cost to print and distribute. An application blank can be obtained by dropping a postal to Headquarters, American Radio Relay League, Drawer 4, Hartford, Conn. All orders for books or License Certificates should be sent to this address. ~ SPECIAL LICENSES. As is well known among most amateurs by this time, we have secured the co-oper- ation of the Government to the extent that where it seems desirable for the purpose of relay work, a Special License will be grant- ed by the Bureau of Navigation, provided the applicant holds a First-Grade Commer- cial License, and provided he is favorably recommended by the League. This does not mean that everybody can secure a Special License. Distinctly the reverse is the case. No Special Licenses are issued except where it is very plain that the interests of the American Radio Relay : bulletin QST 7 League require it. Therefore, if you have a good station and hold a First Grade Commercial License and are located away from the sea coast, and absolutely require a transmitting wave length of 425 meters in order to be able to handle relay messages, there is a chance that you may secure a Special License. But, unless you can make it very plain that you meet every one of these conditions, it is a waste of time for you to think about a Special License. The program to follow, where a station is entitled to a Special License, is to write to the Radio Inspector of your District, and secure application blanks for Special License, and after filling these in, to send them to Headquarters for consideration. If it seems desirable that the station be granted a Special License, a favorable en- dorsement is made upon the application, and it is forwarded to the District Radio In- spector. It is then up to the District In- spector to either favorably or unfavorably endorse after which the application is sent to Washington where the Bureau of Navi- gation finally passes upon the matter. ~ First Issue of QST Nr. 1 December, 1915. After considering the matter for several months, it has finally been decided to issue regularly some kind of a bulletin to League members. During last winter, the need for this was very apparent. Many stations would have been brought together which never got together, if there had been a regular circular distributed which contained general information. The difficulty has al- ways been how to pay for it. The mem- bers did not order the new List of Stations book and License Certificates as fast as they ought to have, and the officers had to go down in their own pockets to pay the print- ers bill, clerical help, postage, supplies, etc. It did not seem wise to continue to spend money on circulars or bulletins unless the members indicated enough interest to at least get the List of Stations book. \ After obtaining the views of several mem- bers and thinking it over, the President and Secretary finally decided to risk a few more dollars on a different plan. This new plan was to make the circular or bulletin take the form of a magazine, which the membership would be willing to support. Enough money would have to be put in to distribute three or four issues of the maga- zine in order that the amateurs throughout the country could get acquainted with it and come to like it well enough to be willing to buy it. After much hard work, the President and Secretary out of their own pockets have produced QST Nr 1. It constitutes the first of general information on relay matters, and they hope to follow it each

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Leag at creep cisn QST December, 1915 one. At the end of three ident and Secretary hope e able to pay for itself, and * Books and Licenses will ugh money to pay back mentioned, the sums ivanced to print and dis- list of Stations Books, ense Certificates, etc. Relay Station Of course the success of this plan hinges upon whether the membership will send in their dollar right away for the List of Stations book and the License Certificate and also whether they will subscribe to QST. If they do, we are all right, and we have a fine’ future promised us. If they do not, then the President and Secretary will have lost their money and wasted a lot of hard work. SBE J. Lippert Book Review lition “List of Radio States” for July Ist, of the printer. The certain. Bulletin is issued au of Navigation. The latest alterations and f Radio Stations, and ineous radio matters. ription per year 25c. ent of Documents, Printing Office, m, D. C. \ illetin of the kind the Errors are sure to itor would consider it ned of all errors. Criti- e future editions, The next Book of Radio Telegraphy by R. Stanley is a new book which covers an ad- vanced up to date text, with simple mathe- matics, and clear explanations. We are all pleased to see the 1915 edition of the Year Book of Wireless Telegraphy and Telephony in the Market. This is a book most amateurs can not do without. Its list of radio stations of the world is in- valuable and its glossary contains very use- ful wireless data. It can be secured through the book department of the Marconi Pub- lishing Corporation, 450 Fourth Ave., New York City. ‘\ All amateurs are requested to send ar- ticles on radio matters. Contributions and pictures will help to make the bulletin a success. Send in yours today.

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December, 1915 Pictured QST Electro-Magnetic Waves By Clarence D. Tuska, Assoc. I. R. E. Many amateurs are proficient operators, but have only a vague idea of the theory of electro-magnetic waves. For example, you continually transmit Hertzian waves, but have you ever pictured what happens when you send a dash? To explain the ether waves, sider a vertical aerial. let us con-

+ a ‘tie Pa ~~ mM re Ps . + ~~, . 4 ‘ ai? .» , ¢ . + ~ . ‘ s 7” e --a~- bat . 2 ‘ yo ” Ps -” i. /_ & © ‘ / - ,? - ” + . es \ ees th, s = %, . *% + er 2 @ ’ ‘ Pa 7 ~ " . ‘ ‘ Vy gee? 6 es ry 5 ~ +. kee / , ~ ‘ ‘\ i , £2 ’ ‘ +’ % ‘ \ Me cee gy 2 oe ee \% ‘ "ev ‘4 eS Te | . ees \ ’ tae? i vy qi ; \ ’ ' ‘4 ‘ ‘ a &.. ‘ !, . ) ‘4 , £2.49 pes ‘ -_ ‘ Lt. 626% ' i i a ‘ 1 ' s? ‘ ' s ' +8 pt ae @, tee Seeeeeta ' ‘ne ' ‘ ] i eee eee ‘ ee ee 2 Fig. 1 When the aerial is fully charged, the lines of strain leave the conductor at right angles to its surface. (Fig. 1.) Upon the discharge the upper ends of the strain lines rush down to meet the lower which move comparatively slowly as they pass along the earth. The earth offers more electrical resistance than the ether. When the upper ends of the strain lines reach the bottom of the aerial, the discharging current has reached its maximum, and as it reaches zero, it charges the aerial in the reverse direction as shown in Fig. 2. Therefore the new strains are formed with their feet on the earth. As the new strain reaches its maximum, the looped strain dies out, but loops are set up in the ether beyond. These loops are set up because when the electrical

on™ ons, 7 \ / ‘\ ’ SF ‘, i 7 ‘ e ‘Bt ‘ , / \ > "\ ’ -™~ ‘ G7, 4 ' / ‘ ‘ ‘ ‘ ‘ 1 , \ ‘ ‘ — a ‘4 oe ‘@¢ ar x oA ‘ - \ oA J Oo os tt pn 0 8 i Foe? Fae 6 ‘+f fe F 84 § Steet ue 4% Perr SAREE yvh : ‘ ‘ oP gy Pe} AVA TS 2 ' Ht FP#ada ghhhhhh vt , &* ~eeees veal ' te ei oe See t, eet a e ¢ i Pe FO, PETS tts ' ° ' -. ‘ ‘ eS ae eo ee rere Ee --- $+ $+44¢4¢ <—-=— strain dies out, it sets up a magnetic strain. Upon the collapse of a magnetic strain, an- other electrical strain is set up in the oppo- site direction to those existing before, as in Fig. 3. This action keeps repeating at its tremen- dous frequency and the waves are propa- gated at 300,000 kilometers per second. In practice we do not use the plain vertical aerial. The action being similar to Fig 4. (Figs. 4 and 5 here). Now we observe that the lead in is about the center of the wave action, showing the electro magnetic field is stronger on the lead in side. This gives us a theory for directive aerials. Upon the start of the waves, the peaks lean toward the aerial, but as the waves are propagated, their feet lag, owing to the resistance or impedence of the earth. The peaks advance and approach receiv- ing aerial as shown in Fig. 5. Now, if the transmitting aerial is slanting as shown in Fig. 4 with the lead at the higher end, the waves will point even more toward the sending aerial, but will reach the receiving aerial in a nearly vertical position. The nearer vertical, the waves reach the receiv- ing aerial, the more energy they will im- part to it. / taal \ ~ ‘ . ‘ -- ‘ ‘ / \ . . ‘ ~ ‘ * ‘ ( ~ . . ‘ e ‘ rn Fs ‘ ‘ * . ‘ ‘i . S an ‘ . . rm. \ \ % ‘ ‘ ‘ ‘ ‘ ‘ . ‘ ‘ ‘ ‘ . ‘ ‘ -- « - . \ ‘ . sa” \ » ‘ ‘ \ \ 4 ne S N \ Pa set ,°@ oO, .

? - heneteee @ehe's: Gu*e* "eo b&b & \ ! - ae = | eee ++ -_-—-—-- - oo @ 7-_-__lo +. —~ Fig. 3 By studying this important theéory,. we can see how mountains and oceans affect the waves. In crossing a mountain, the Waves must pass over more ground at their feet in comparison with the peaks passing through the ether. This causes more lag than on level ground, and the peaks ad- vance correspondingly. Naturally the waves reach the receiving antenna slanting more than if they had come over level ground and less energy is received. In pass- ing over the water, the waves are propa- gated in a nearly vertical direction, as the

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QST December, 1915 water nductor. It will be seen nor ey, from tion, that many factors Pid _ have ted, but enough has been Ss Pe give! isis of a more elaborate ) theor 4 4 a gue oe 4 tf £ 7 / l Pd 4 ‘ / / / V7. \ / f / / we ASS / / / ——— \ / 4 / . \ / / / } Ly Fig. 4 Fig. 5 Station of Roy G. Burr, Norwalk, Ohio A Typical League Station CUT OFF ON THIS LINE SUBSCRIPTION BLANK America idio Relay League Hartford, Conn. Gent closed find 25c (stamps, currency, check or money order); kind- ly send n »nuary, February and March numbers of QO S T. Name Street ar Town and State

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December, 1915 QST Latest list of Additions to American Radio Relay League List of Stations ALABAMA Huntsville Mobile CALIFORNIA Alameda Alhambra Berkeley Berkeley Oakland Pasadena Redlands San Bernardino San Francisco Sawtelle COLORADO Denver D. C. Washington FLORIDA Jacksonville Tampa GEORGIA Athens Savannah IDAHO Boise Pocatello ILLINOIS Carroliton Chicago Chicago IOWA Cresco Dubuque KANSAS Topeka Topeka MAINE Gardiner Gorham Portland Portland Sanford Westbrook Westbrook MARYLAND Baltimore Highlandtown Robert M. McLain Ernest M. Curtis F. Arnberger, Jr. { Frederick Gilstrap ) Charles Linville J. A. Forsburg Frank Seeley C. E. Cadwell Jerome Miley Howard Hamilton W. W. Gates Fred Neilsen Geo. E. Chamberlain W. F. Lapham E. F. Ramsey Thomas R. Dunk Patrick H. Wall W. B. Pope E. W. Steinhauser Car! Eichelberger P. C. Samms Stuart W. Pierson John A. Goorisich Harold H. Shotwell Will P. Rathert C. E. Fawkes Wm. McClintock Edison Pettit H. and J. Cusick Lawrence B. Robinson R. C. Carles J. H. Nicholson O. W. Brown W. P. Meggison Rahma W. Pratt C. H. Baxley G. L. Talbot 513 West Clinton St. 350 Selma St. 3230 Garfield Ave. 715 N. Curtis Ave. 1734 Sonowa Ave. 2615 Etna St. Monte Cresta Ave. 585 Bellefontaine St. 1218 Sixth St. 1075 Second St. 136 Caine Ave. 121 N. 6th St. 1545 Milwaukee St. 640 Irving St. 1424 Laura St. 258 Plant Ave. 197 Dearing St. 223 W. 40th St. 214 Maple Ave. 2316 Clybourn Ave. 446 W. 61st Place 316 5th Ave. W. 503 Hill St. 1257 Topeka Ave. Washburn College Ob. 21 Beech St. R. F. D. No. 2 66 Evans St. S. 119 Washington Ave. 12 Kimbal St. 13 Mechanics St. Longfellow St. 1126 W. North Ave. 516 14th St. 5BS 5BR 6FA 6AAH 6JF 6TF 7CE 7SP 9PY 9SR 9EF PR 9FP BM WZ HC 1FE 1FY 1FU 1AC 1FJ 1AM 3SK 30F

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12 M (Ss MICHI VISSI>S MISSO NEBRA NEW NEW NEW } N« ETTS HIRE Leon C. Runey Fred F. Flanders Lane Andonegui Harold F. Hill Stanley Marshall H. G. Campbell Cc. V. Purssell L. S. Bennett D. J. O’Brien R. A. Scott R. A. Snow M. A. Baylies W. R. Black H. D. Copeland Fred J. Cosgrove M. C. Wood O. C. Klager Forrest Phippeny P. E. Diederich L. M. Ilgenpritz R. J. Fowler H. W. Livinggood S. J. Miner G. H. Norris L. N. Goodman Harmon Deal A. Il. Graham Guy E. Wilson W. H. Carroll W. C. Reinhardt R. F. Howe 1. B. Worth Chas. Murray \. L. Pfieil W. N. Baker Karl G. Krech D. N. Corson V. F. Pennell E. R. Bourgeois H. B. Day Samuel S. P. B. Collison Charles Hallenbeck George Kirch, Jr. E. C. Hoemer, Jr. W. L. Hoyt G. H. Scharrenbeck George T. Droste George Holmes J. E. Johnston G. C. Meder J. T. Smith Barriette 19 Fairmont St. ® Norway St. 1010 Mass. Ave. 102 Trowbridge St. 1 Hobart St. 86 Kenwood St. 1257 Morton St. 2 Lawrence St. 152 Bridge St. 952 Franklin St. 19 Gage St. 111 Grinnell St. 32 Jefferson St. 12 Huron Ave. 57 Cedar St. 14 Armory St. 611 S. Main St. R. F. D. 4 915 E. Grd Blvd. 2 Forest Ave. E. 1209 E. Kearsley St. 1825 Mich Ave. 2253 Jeff. Ave. 77 Melbourne Ave. 6 S. Fountain St. 3033 Park Ave. 3922 Flora Ave. 6334 McPherson 3437 Taylor St. 94 School St. Madison Ave. 242 Cottage St. 881 Montgomery St. 316 Godwin Ave. 51 Berkeley Ave. 15 Baldwin St. 901 Central Ave. 555 Mountain Ave. 311 Macon St. 172 Maple St. 1150 54th St. 364 75th St. 74 Spring St. 14 Hilton Ave. 126 W. ist St. 1309 Pugsley Ave. 164 West 146th St. 1379 Clay Ave. 990 First Ave. 126 E. 114th St. Ave. December, 1915 1LS 1OH INA FV ING INU 1 MP 1HY 1QJ 1LT IRT IMC 1QK 10S IMM SRA RC X\ RII SON SSF SMR SBR RID 5bAS INN 9MQ “ieP CW oOBW

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December, 1915 New York City Roselyn Heights White Plains NORTH DAKOTA Pembina OHIO Cincinnati Cincinnati Cincinnati Cincinnati Cincinnati Bucyrus Cleveland Cleveland Cleveland Euclid Hamilton Lakewood Lakewood North Fairfield Oberlin Springfield Waynesfield Youngstown OREGON Portland PENNSYLVANIA Easton Edgewood Park Crreensburg Meady ille Ovontz Philadelphia Philadelphia Philadelphia Philadelphia Pittsburg Pittsburg Pittsburg Pottsville Wayne York RHODE ISLAND Newport SOUTH CAROLINA Summerville TEXAS Dallas Georgetown VIRGINIA Portsmouth WEST VIRGINIA Martinsburg WASHINGTON N. Yakima Seattle Seattle WISCONSIN Sheboygan Sheboygan CANADA Moosomin, Sask. QST John Vegessy 437 6th St. R. G. B. Lee H. E. Dickenson 91 Greenridge Ave. C. D. Curtis Henry M. Rubel, Jr. J. M. Schaaf Carl P. Goetz, Jr. G. H. Kroeger Fred W. Stern A. C. Wiesemann John P. Lippert Myron R. Pesek 920 Burton Ave. 322 East St. 1518 Knowlton Ave. 1837 Clarion Ave. 835 Glenwood Ave. 933 Bank St. 4 Stanwood Rd. E. 3288 Fulton Road Robert G. Sidnell 1268 W. 115th St. Edward R. Williams Stop 133% Shore Line Doron Bros. Elec. Co. 329 N. C. St. George E. Grostick 1605 Wagar Ave. Grant D. Rogers 2065 McKinkey Ave. Hoyt S. Scott Ross Gunn Wm. Haynes James M. Day, M. D. T. J. Bray, Jr. 369 W. Lorain St. 102 Florence St. Wick Ave. George C. Henny 530 Heights Terrace Paul F. Miller Harold Knapp Frank G. Beck Walter Baird David B. Fell 38 S. 5th St. 224 Elm St. 122 N. Maple Ave. 674 E. Arch St. 19 Park Ave. W. N. Deerham 4618 Spruce St. J. C. Van Horn 5127 Arch St. Emil J. Meyer, Jr. 1919 Green St. Ernani Rancetelli 1435 S. Broad St. Jack O. Kleber 1135 Murray Hill Ralph C. Powell, Jr. 5236 Westminster PI. J. Lauer Stauft 347 Oakland Ave. Cotesworth M. Jackson State Police C. Walton Hale 107 Aberdeen Ave. Harry G. Miller 1526 2nd Ave. Francis Horgan 239 Broadway Mayrant Simons Box 175 1101 East 8th St. 233 Orchard St. Frank M. Corlett Robert P. Ward Vincent Tabb 26 Court St. W. A. West 617 W. King St. Albert Baker Howard S. Pyle Chas. E. Williams Box 33, R. F. D. No. 2 3376 York Road 8326 13th Ave. N. W. Chas. T. Schrage 517 Wash. Ct. Palmer Leberman [Jpper Falls Road John Wells P. O. Box 488 2GT 2TU 2TC 9GN 8ADB 7GC 3AGN 8RB 8NS WB 3TR 3VA 3CM 3PD 3VC 8GV 8QP 8LH 8JK 3AIG 3TD 1TI 4BK 5BJ 5BU 3TH 8ADQ VT ING 7BW 9SS 9LX JW 13

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14 QTA QST December, 1915 List of Abbreviations used by Amateurs lo you receive me? —t my | hed (or: at Question t ship or coast station is i receiving badly? 1 20? being interfered with? atmospherics strong? increase power? lecrease power? send faster? send slower? top sending? 1 anything for me? ready ? 9 1 busy? tand by? ll be my turn? ignals weak? ignals strong? ne bad? acing bad? your time? nform ¢ him? illing me? forward the radiogram ? received the general Shall that you are you have o'clock) ? me when Answer or Notice This is I am receiving well. I am receiving badly. Please send 20. I am being interfered with. Atmospherics are very strong. Increase power. Decrease power. Send faster. Send slower. Stop sending. I have nothing for you. I am ready. All right now. I am busy (or: I am busy with ) Please do not interfere. Stand by. I wil! call you when required. Your turn will be No. Your signals are weak. Your signals are strong. The tone is bad. Your spacing is bad. My time is Inform that I am calling him. You are being called by I will forward the radiogram. General call to all stations. Will call when I have finished. I have difficulty in Send each word twice. receiving you. Repeat the last radiogram. bbreviation is followed by a mirk of interrogation, it refers to the question indicated for that interrogation. Detail of Roy C, Burr’s Sending Set

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APPLICATION BLANK American Radio Relay League Incorporated Hartford, Connecticut Your Name Address (Street, City and State.) Your Age Your Station Cal! Letters Are you a member of any Radio or Wireless Club, and if so give its name and address: Length of your Aerial Height above ground Number of wires in Aerial and space between SENDING EQUIPMENT Do you obtain your power from Batteries or City Current? Do you use a Spark Coil or a Transformer? What is your Power Input? Is your Spark Gap Rotary, Fixed or Quenched ? What Tone has your Spark? Approximate Wave Length FIVE most distant stations you communicate with: Give names and addresses of the State distance in miles (OVER)

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RECEIVING EQUIPMENT eiving Set mat eceiving range in miles? é ence ning hours and how many evenings a week do you average at nection in your house, or convenient practically constantly in running order? per minute can vou receive with certainty? Commercial or Government Station to you? cense, and if so what Grade and No emarks or comments which you think will be of help in per- \mateur Radio Relay Stations throughout the country. The strictly confined to facilitating the relaying of radio messages OFFER TO RELAY OR DELIVER ANY AMATEUR RADiO ARE SENT TO ME Date

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Try This Head Set for Ten Days and see for yourself how clearly you can get stations that are barely audible with your present head set. If it does not prove to be all that we claim for it, well gladly refund The your money. Stromberg-Carlson Radio Head Set is noted for its extreme sensitiveness. The tone is soft and beautifully distinct, which greatly reduces static interferences but brings in weak signals clear and strong. Furnished with concealed cord connec- tions, universal ball joint adjustment, six foot waterproof cord, laminated pole pieces, etc. Standard A-9723 Radio Head Set wound to 2000 ohms sent for $8.25. Priv- ilege of return in 10 days if receiving efficiency is not increased. Bulletin No. 1006 which describes the general construction and “What Some of the Users Say” is free for the asking. Stromberg-Carlson Telephone Mfg. Company Rochester, N. Y. Chicago, Ill. Toronto, Can. Arlington Notes. Shortly after the 10:00 p. m. time signals, NAA sends weather bulletins in code let- ters and figures to express weather condi- tions along the eastern coast of the United States and the Great Lakes. In case you have lost the key used they are given below:— letters U.S. W. B. United States Weather Bureau S Sydney T Nantucket DB Delaware Breakwater H Hatteras C Charleston K Key West P Pensacola B Bermuda Du Duluth M Marquette U Sault Ste. Marie G Green Bay Ch Chicago L Alpena D Detroit V Cleveland F Buffalo The first three figures denote the baro- metric pressure in inches as (001—30.01) or 959—29.59). The fourth figure represents the direction of the wind: 1 North 5 South 2 Northeast 6 Southwest 3 East 7 West 4 Southeast 8 Northwest 0 Calm. The last figure gives the force of the wind on the Beaufort Scale. Beaufort Scale of Wind Force. Number and designation. Miles per hour. 0 Calm 0—3 1 Light air 8 2 Light breeze 13 3 Gentle breeze 18 Examples of Code:— U. S. W. B. S 00355 T 93472 United States Weather Bureau Sydney, 30.03, south, fresh breeze, 28 miles per hour; tucket, 29.34, west, light breeze, 13 per 4 c Aa x 1( 11 1 — ‘ i t hour. Moderate breeze Fresh breeze Strong breeze Moderate gale Fresh gale Strong gale Whole gale Storm Hurricane Nan- miles 23 28 34 40 48 56 65 75 90 and over Wind force greater than 9 is given by a word instead of figures.

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*AQUSIOIZJO pue APAIJOIIVG ssousaryisues UI. TIAN VW,, 4.1 ‘snjyeredde NON “)IW,, 41°94} AeAO UOJIOHON] pue oytAdeg svoy 0} o[qe Zuleq ul pe4ysyep sie suoijed party “sizes ano jo Auew ‘sn Aq Alot “SNJOXS pesinjoejnueuw ‘joyJeW oy} Uo sodA} 8} Jo puly ATUO Soy} ‘uorjoOns}su0d pue uUsIsop yeulst Fe es ft Ajeynjosqe jo aie snjeledar 7 «NONDINWN,,?°4L iNOLLNAILYV ‘AN ‘CsIU[y "dio SSajattM UOUSIP SLNZULAzI]T 403 OIIAM snjeseddy oipey Url PAO A 387] SUL

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Brandes Radio No. 5 Model Headsets Loose Coupler This instrument is made of the best material obtainable, is very hand- some and accurately made. Will tune up to 3,500 meters on a fair size Antenna. . Price, $15.00 I also stock the finest line of Switch Points, Knobs, Cabinets and Access- ories on the market. The Great Favorite with both Professionals and Amateurs Send Stamp for Our Catalogue F C. BRANDES, INC. * bide: — ” Room 821, 32 Union Square NEW YORK New York City Send 2c for complete literature. Chambers Rotary ? Spark Gaps Have you used the subscrip- tion blank on page 10? If you have not, turn back . | 0, Mahowany Base; $13.50, Marble Base, run perfectly steady. Gives a tone similar to a Flute, on 60 Cyeles. Runs on 110 D.C., or A.C., and is suit- now; it is never too ahte for , to 1 K.W. Motors, have 1,” Shaft. Run about 6,400 R. P. M. with load on, . ave slower Motor, at $11.50 on mahogany base, ‘ 712.50 o Marble. late to mend sth sepeeinleoietge , ' xc. in Stamps brines our new illustrated Cataloguc. l’ositively none sent otherwise, 9 F. B. CHAMBERS & CO. 2046 Arch Street . Philadelphia, Pa.

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YOU WILL FIND the audion detector in the best amateur wireless stations. A combination audion detector and amplifier set will assure you of results which are impossible with any other detector. Its superiority over anything else to be had is easily proven to your own satisfaction, and its extreme sensitiveness will delight you. There is great satisfaction in know- ing that each time you are through transmitting you will hear the distant station with the same intensity—by merely moving a switch. , We have a booklet which explains the audion amplifiers which we would like to send you. If you will send us your name and address we will forward a copy to you at once. We carry in stock at all times a complete line of audion detectors, renewal bulbs, etc., and can usually make shipments the same day your order is received. We manufacture many other good instruments, and full information and literature will be sent anyone upon request. The Wireless Mfg. Company, Canton, Ohio Duck's New BIG NO. 9 312 Page Electrical and Wireless Catalog More than ever justifies your verdict that it is the one catalog worth while Everything Electrical For the Boy, Home or Store 0 | H n stamps will bring this unrivalled catalog to your home. The great n y C cost of catalog and the exceptionally low prices (oftentimes fully y _ 25°~ below usual retail price) prohipits its distribution otherwise. the 8c on first dollar purchase. Our rds show that 70°: of our catalogs produce us patrons. Many of our t the waste of 90°. of their catalogs. Who pays for them? This is reason why you should have our catalog, backed by a great selling wer, before even thinking of buying elsewhere. anda | Only Ac n stamps will bring to you our complete wireless ‘catalog ef 128 pares. Over 40 New Pages of Wireless Instruments | substantial reductions on many popular wire- instruments and standard electrical supplies. \ FEW OF THE ARTICLES IN OUR CATALOG: 129 Instruments (129 pages) magnet wire of all kinds, raw material, storage telegraph instruments, battery motors, commercial motors and r machine motors, telephones, step-down transformers, massage vi- rene! brat h buttons, auto accessories, flash lights, hand lanterns, auto and miniat Xmas tree outfits, voltmeters, ammeters, lighting plants, Victrolas, air rifle planes, model builders, electric railways, electrical and mechanical book electrical supplies. The William B. Duck Co., 229-231 Superior St., Toledo, Ohio

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Multi-Audi-Phone New wonder in the wireless world. _Increases the audibility 1,500 times Are You from Missouri? Then Read These Letters F. B. Chambers & Co., Wireless Engineers, 2046 Arch St., Philadelphia, Pa., write: “On Tuesday evening we gave a demonstration of the Multi-Audi-Fone, to about 300 men; Technical and experimenters. The hall in which the demonstration was held is about 75 by 150 feet, and the signals from all stations working at the time, could be heard all over the hall; and the louder ones could be heard in another room back of the main hall. Even the Amateurs came in “howling,” and the aerial used was only 3 wires, and about 40 feet high. Everyone was more than surprised at the results, and before us when we say—that it surely was some amplifying; and there is nothing that can anywhere near touch the Multi-Audi-Fone.” Jeffries-Young Antenna Co., of Atlantic City, N. J., write: ‘The Amplifier and Multum in Parvo Set received from you are giving wonderful results, and come to the mark on every claim made. The Arlington Signals before audible with the Phones 12 inches away, can now be copied in nearly every room in our house, on St. Charles Place, where our winter station is located.” W. O. Horner, of Cleveland, Tennessee, says: “I have been trying your Multi-Audi-Fone out as an Amplifier. . . I was more than surprised at its sensitiveness. . . . It is certainly wonderful.” Again he writes: “Yours of the 28th at hand. I! use a Triple Valve Station of highest class and thought I had the best on the market, but when | hooked your Multi-Audi-Fone to the third Audion I was astonished at its Amplification. “I laid your Phones on the table and walked one hundred and twenty-five feet to the rear of my store and copied Arlington and Key West at 9:30 P. M. Many 600 Meter stations I also copied at this same distance. I also hooked your Multi-Audi-Fone to a single Audion and signa!s were much louder than all three of my Amplifiers.” S. Kruse, of Halstead, Kansas, writes: ‘“‘Multum in Parvo is a wonder.” M. B. Schwartz, of Brooklyn, N. Y., writes: ‘“‘With regard to results obtained on connecting the Multi- Audi-Fone in my Radio receiving set as an Amplifier, I am glad to say that I was astonished by the roaring and whistling of myriads of stations, near and far, many of which I never heard before; the small amateur stations coming in so loud that they were heard all over the room—it was like opening up a new region, fertile with activity and life, heretofore unknown. It may also probably be of interest to you to know that I heard the SS Brazos every evening from the time she left San Juan, P. R., Oct. 20th, until she reached N. Y., during the run she came in with remarkable audibility. “The above is precisely what happened after including the Multi-Audi-Fone. Signals were heard all over the house for a distance of from 50 to 100 feet from Phones.” F. S. Hammond, of St. Marys, Pa., writes: ‘‘With Amplifier, my Tuner Galena and small horn attached to one of your Phones, Arlington can exactly be read in any part of room. Substituting Audion for Galena nearly doubles strength of signals, making them readable in hall downstairs.” . Glenn Sabin & Co., Wireless Engineers, of Northampton, Mass., write: ‘‘We have demonstrated your Multi-Audi-Fone, to a number of experimenters and the results were surprisingly satisfactory. “We have picked up stations with a single Multi-Audi-Fone, coupled to a single Audion, which we have been unable to get with a double Audion.” “For getting Arlington time there is nothing that can touch it. “On our aerial we can pick up fellows fifty and sixty miles away operating on half and three-quarter inch spark coils, which is excellent work to say the least and proves without a doubt that the Multi- Audi-Fone is an Amplifier that cannot be beaten.” We guarantee the Multi-Audi-Phone for three years. With fair treat- ment it ought to last one hundred years REMEMBER THESE FACTS: That the Multi-Audi-Fone works equally well with damped and undamped circuits and will work equally well with any Detector or Receiving Set, and that it will cost you more for batteries than . ‘ - we ... TEN CENTS A MONTH Our regular orders have already increased to such an extent that we are now compelled to withdraw our ten-day trial offer. Everybody will EVENTUALLY buy a Multi-Audi-Fone. Why don’t you buy yours now and GET THE PLEASURE OUT OF IT? Multum in Parvo Receiver, including Crystaloi Detector and Buzzer , pees -+» $20.00 If you prefer to use your own Detector and not buy the Crystaloi and Buzzer ci ere -. 15.00 Multi-Audi-Fone, including our specially wound Head Set ................ re --- 306.00 OUR COMPLETE WIRELESS SET . anes at cea wicwine mone ...» $45.00 or $50.00 The Christmas present of ALL Christmas presents, our complete Wireless Set, $45.00 or $50.00 Send for circular today. Ask your dealer tomorrow Multi-Audi-Phone *;"°"" Elizabeth, N. J.

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The Next Issue issue of “QST” will be a wonder. There will be an article on the ) n, and it will be written in language which no one can misunderstand. Cor peration, what stations can be heard with one, and theory will be 0 ef and crisp manner. The amateur will understand this newest radio e) hen he reads this article. Nauen and Hanover, Germany, are read fifty-foot high aerial, using an oscillating audion. feature of the next issue worth watching for will be on the matter of \ Radio Corps. It is being suggested by the officers of the League and that the better amateur radio stations of the country will be recog- vernment. Big things are certainly coming for the up-to-date amateur. nge so that yor will not overlook the next issue. Ie rang m of testing among amateurs, will be described also in the next number. We a w difficult it is sometimes to pick up a distant amateur station which we re ld be able to easily work. In the next issue a plan is suggested which wi Miscellaneous please note that we are always giad to welcome contributions from wireless subject. Send us your ideas or photographs or long anything in the freak line you have noticed. Never mind if you irself to your satisfaction. Write it out any oki way, and we will if it should need any. verybody, that we will print free of charge for sale and want ads. for sé pparatus up to any reasonable number of words. Practically the entire amate yntingent of the country will see QS T and there is always some hat you have to sell or exchange. FOR QST SUBSCRIPTIONS. We will have a lot of people who want t 5 T but who have not the necessary personal snap to arrange for a rezvular tion unless some one makes it easy for them. The agent has a good opportu! We will send one extra copy whenever an agent sends in subscrip- tion for If an agent sells eight, he receives ten from us. He can sell these and get h mmission.

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The Secretary of the American Radio Relay League Offers a Reward! Hé wants an Answer to One of the Many Curious Letters He has Received The American Radio Relay League like to read it and suggest an has grown very famous and, as this answer. The Secretary has decided fame has extended all over the wire- to pay $5.00 for the best answer. less world, it is not unusual that The answers must be received by many curious letters are received by Dec. 30th, and will be judged from the Secretary. The following letter either their funny side or technical is so interesting that it seems cer- value. tain the readers of QS T would Hynacus, Japan To Honorable Mr. Radio Secretary Tuska, Honorable Relay League, America I ask to know. When condenser made separators of glass we know dialectrics much pressed by electricity. This much sure, why, tests made show it. Honorable writ- ers of English make tests and demonstration that metal can be vanished and all the same when new metal comes to con- denser, yet discharge comes too the same. Why thus we see plain that dialectric heart of condenser. Then now. I ask to know if air | use no glass for important dialectric does it obtain pressed? Like glass? Honorable American teachers tell me yes. Air—glass—mica all same without difference among them. | Then now again how? Suppose | have air variable condenser and | the air vanish blowing by breath. Goes away quickly the air. How goes my electricity charge? Goes ? | think me not. Then how charge gets back? Explanation me Honorable Radio Secretary for it too which accept my assurances most distinguished consideration. KATHIS KATHKAN, Japanese Radio Student, . P. O. Box 1155, Hynacus, Japan S. P. Why this write typewriter, you Japanese write mostly not know. K. K. \

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Notice to All League Relay Stations — Headquarters, Hartford, Oct. 20, 1915 At a meeting of the Directors of the American Radio Relay League held at Headquarters, Oct. 20, it was voted supply for the remainder of the year the List of Stations Book, one pad of Message Blanks and 1915 Station Appointment Certificate to all Relay Stations in good inding who send in their station dues of ) cents before Dec. 6. Viembers who have not yet secured ir List of Stations book, message blanks d station appointment certificate should take advantage of this opportunity and t their orders in immediately. Clarence D. TusKa, Secretary

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The List of Stations Book COMPLETE LIST OF RELAY STATIONS OF THE AMERICAN RADIO RELAY LEAGUE INC. Shows what Relay Stations are within your Range Gives name of owner. Complete address. Call letters. Sending power. Kind of gap used. Number of words can receive per minute. _Lis- tening in hours. What license is held. Tele- phone connection or not. Best list of Amateur Radio Stations in existence Indispensable to every amateur whether in Relay League or not Sent postpaid to anyone upon receipt of 35 cents in stamps, currency, check or post office money order THE AMERICAN RADIO RELAY LEAGUE Incorporated HARTFORD, CONN.

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New Mesco Radio Apparatus ROTARY SPARK GAP Spark Gap is required in eyery transmitting station by the Federal authorities, that this type of ga produces a pure wave of low damping decrement. It ficiency of any transmitting station from 20 to 30 per cent . This Rotary Spark Gap emits a hig musical note, more audible to the hu- man ear, can be heard at greater dis- tances than the note from the station- ary type, and cannot be mistaken for static or other atmospheri distur- bances, a fault common with the sta- tionary vap due to its low frequency note. The rotating member has _ twelve sparking points mounted on a hard rubber disk and is carried on the motor shaft. Also fitted with two stationary elec- trodes with special adjusting devices. The Gap can be successfully used on any of our spark coils or transformers up to and including 1 K. W. capacity. Our standard Globe Motor is used, which will operate on 110 A. C. or D. C. circuits and attains a speed of 1500 R.P.M. Also made with our which can be operated on a six-volt circuit. Price y Spark Gap, 6 volt ... ; - bier . ‘ 6 $12.00 Spark Gap, 110 v., A. C. or D. C, ‘ ' ‘ 13.00 nly, with two Stationary Electrodes, 1 3 , .§ ee ry , 5.00 UNIVERSAL DETECTOR STAND heavy brass cup, with four binding screws, capable of holding crystals up to diameter. i encloses a brass ball. Through an opening in the wall, a brass arm with is secured fast to the ball, ocket joint, allowing it to en angle or used in any pori- . ; } S&S ol s = troduction of different size xh the arm. A set screw irm binds the wire. binding posts. All mount- ne hard rubber base 24x parts nickel plated. A ball in the hollow stand- cup under the adjust- arying pressures can be require. Remains per- nt under jars and vibra- ption Price ees Bice cnncs nb ddiredat owes s ‘ we $3.00 SEND FOR OUR NEW CATALOG H28 inches, contains 248 pages, with over 1,100 illustrations, and de- ucuvage all about Kells, Push Buttons, Batteries, Telephone :; rele- oys, Burglar and rire Alarm Contrivances, Electric Call Bells, Electric ; fatteries, Motor Bout Horns, Electrically Heated Apparatus, Battery Battery Gauges, Wireless Telegraph Instruments, Ignition Supplies, Et thousand and one ways where electrical devices may be used, and to know ir purpose you need this catalog. It costs you nothing. ND FOR OUR NO. 17 MANUAL WIRELESS TELEGRAPHY even if only superfic ally interested. Around about you every day you eccurrance in which wireless played a distinguished part. t may not The Manual will explain it. To the student of Wireless Telewraphy that is indispensable to a proper understanding of the art. \ good uublished for the first time. Ve ask ten cents ($.10) for it— give you a coupon receipt which can any order amounting to One Dollar ($1) or more. | addre now, and et one of the most complete, comprehensive ets published. Vianhattan Electrical Supply Co. CHICAGO ST. LOUIS 114 S. Sth Ave. 1106 Pine St. SAN FRANCISCO 604 Mission Street

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