JANUARY 19 24 25 CENTS
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.features in this Issue The Big Chicago Radio Show AVAIVAW&VATIL A A A `New Wireless Age Receiver Push a button-that's all ! Jmertcas 9oremost Easily Constructed 'DX in the Grand Canyon zdiophone eview The Woman Listens In 1L NNING MPLIFIER TYPE C 3, PATENT
RADIO TUBES The Heart of your Receiving Set IN the case of all living things the heart is the most vital Laboratories of the General Electric Co., and are now being organ. Weaken, injure or destroy the heart and life is made in that company's modern and mammoth factories accordingly weakened, endangered or destroyed. under the supervision of highly skilled engineers. In a radio receiving set the tube is analogous to the Better tubes are not attainable. There is a model heart. Remove it entirely and the set will cease to function. specially adapted to every set, every circuit and every Use an inferior tube and the results will be inefficient and socket used today. Every radio dealer can supply you generally not pleasing to listen to. with Cunningham tubes. Buy them for replacements. In living things a perfect heart does not always insure Insist that they be included when purchasing a new set- a healthy body, but on the other hand it is indispensable. and you will know that your receiving set has a perfect The same is true of the radio receiving set. It may be heart. perfect in every detail but unless the best tubes are used The care and operation the results will not be perfect. of each model of Receiving Tube is fully explained in our new 40 -page "Radio Tube Data Book." Cunningham Radio Tubes were Copies may be obtained by sending ten Cunningham Radio Tubes developed in the great Research cents to our San Francisco office. C -30M-6 Volts 4 amp. PATENT NOTICE Amplifier $6.50 C-299-3 Volts .06 amp Cunningham tubes are co -er - Dry Battery Det. k ed by Patents dated 11-7.05, Amp 6.50 1-15-07, 2-18-08, and others C-300-6 Volta Gas Con- issued and pending. Licensed tent, Detector 5.00 C-11-1.1 Volta .25 amp for amateur, experimental Dry Battery Det. and and entertainment use in Amp. Special Base 6.50 radio communication. Any C-12-Similar to C-11 Home Office: 182 Second St. 154 West Lake Street 30 Church Street other use will be an infringe. with standard base 6.50 San Francisco, Calif. Chicago, Illinois New York City, N. Y. ment. JANUARY, 1924 THE WIRELESS AGE 1
OTLAND Yard, as well as our own Federal their lost hearing, depend upon the marvelous sound SCSeeret Service-for the capture and conviction of transmission of the DICTOGRAPH Acousticon. criminals, depend upon the marvelous sound Similarly, five hundred and forty prominent European transmission of the Detective DICTOGRAPH. amateurs taking part in the trans -Atlantic tests, as well as twznty-three hundred and fifty expert Ameri- The Embassy at Paris, as well as our od+n great cans also participating-for the reception of loud, clear General Electric Company-for the efficient operation signals from foreign shores, depend upon the marvelous of their organizations, depend upon the marvelous sound transmission of the DIC TOGRAPH Radio Headset. the DICTOGRAPH System of sound transmission of This superlative instrument represents the latest and Interior Telephones. greatest DICTOGRAPH achievement. The coils are Famous members of the European nobility as well rated at three thousand ohms resistance. The weight is as our own thankful citizens-for the restoration of to ounces. The price is eight dollars. If your dealer does not carry the "Aristocrat" write direct to this company, giving his name DICTOGRAPH 220 W. 42d ST. PRODUCTS CORPORATION NEW YORK CITY When writing to ae%ertisers please mention THE WIRELESS AGE Americas 9oremost Iadiòphone Jeview
January, 19241- Contents Tour Authors DX Reception in the Grand Canyon, By Max Abel 17 Pictorial Section - - - - - 19 R. H. G. MATHEWS (The Chi- Broadcasting Congress, By Otto cago Radio Show) is managerof the Wilson 23 Central Division of the A. R R. L. Mat- ty, as he The Chicago Radio Show, By R. G. is known to thousands of radio H. Mathews - - 24 bugs, operates under the call 9ZM, and is one of the best known of the old timers. Whoops of Wild Rodeo Warriors, By Stuart Hyde Hawkins 27 Radio de Luxe In the past he has been active in the - z8 promotion of the amateur radio shows in Chicago and in the starting of Radio The Woman Listens In, By Hortense Lee Topics which was formerly the official 30 organ of the The Navy's Radio Net, By 9th district Council. He is J. Farrell 32 now with Zenith. When Marine Radio Reports Were Tabooed, By Old Timer 34 nIIIIIIIONIiIll01101ililllliial Miles, Some Record! 4,500,000 35 Peeps into Broadcast Stations .DONALD GORDON WARD 36 (R. F. Amplification and Regener- The Personality of a Broadcasting ation) is the technical instructor in the Station, By Lloyd Jacquet 38 Radio Institute of America. He made a Broadcasting Station Directory receiver at the precocious age of io, and 39 was the seventh licensed amateur in the Afloat and Ashore with ist District. His course in electrical en- the Operator, By W. S. Fitzpatrick - 41 gineering brought him to í9i7 and the N. A. W. A. World War, in which he participated as a 46 member of the U. S. Army Signal Corps. Laughter on the Radio Wave He has been a Marconi man on several - 47 ships, and has had a wealth of operating " The Wireless Age " experience. Push Button Receiver, By John R. Meagher 48 Radio Frequency Amplification, Regeneration, and the Single Circuit Receiver, 11191111111111111111111111911111 11131 By Donald Gordon Ward 51 An Efficient Speech Amplifier, By K. M. Mcllwain rAfR. JOHN R. MEAGHER (Push 55 Button Receiver) designed The Test Table, By R. B. Clarkson Wireless Age 57 Uni-Control Receiver, de- Workshop and Laboratory scribed in the December issue, which won 58 immediate popularity. His chief joy in A Crystal Receiver - - - life seems to be, after getting through 59 with the construction of one set, to tum Information Desk - - ______6o impatiently to fresh experiments. He New Appliances wastes little time in enjoyment of the and Devices 62 fruits of his labor, and gets no thrill from State College Receives Gift of Radio Plant - - _ the fact that the completed set works. 63 "Of course it will work!" he exclaims Industrial Inklings - with asperity; and of course it does. 66 Stations Worked and Heard 86
PUBLISHED MONTHLY AT WIRELESS PRESS, INC., 326 BROADWAY, ANGELES, NEW YORK LOS CALIF., 958 So. Spring St. CHICAGO, ILL., Marquette Bldg. GREAT BRITAIN, Coast Publishers Co. Wheeler & Northrup AUSTRALIA, 12-13 Henrietta St., London. 97 Clarence St., Sydney, Yearly subscription in U. S. A., 32.50-Outside U. S. A., N. S. W. 53.00; Single Copies. 25 cents. Entered as second class matter Oct. 9, 1913. Post under the Act of March 3, 1879. Copyright, 1923, Wireless Press, Inc. When subscription expires you will find Office, New York, N. Y., a renewal blank enclosed. Return with remittance promptly. James G. Harberd, Pres. L. MacConnach, Secy. George S. DeSousa, Treas. H. L. Welker, Adv. Mgr. H. H. Reber, Bus. Mgr. Major Jerome W. Howe, Editor John R. Meagher, Technical Editor C. S. Anderson, Associate Editor Because certain statements and expressions of opinion from correspondents and others appearing in these columns from time to time may be found to be the of controversy in scientific circles and in the courts, either now or in the future and to sometimes involve subject merits of apparatus employed in wireless signaling, the owners questions of priority of invention and the comparative and publishers of this magazine positively and emphatically disclaim any for any statements of opinion or partisan expressions if such should at any time privity or responsibility sisear herein. Printed in U. S. A. THE WIRELESS AGE is a member of the Audit Bureau of Circulations AGE 3 I_\ \ \ 1924 THE WIRELESS You Young Men Who Want to Make Big Money ConsklerThese Slarllrirg Tads!
Are you ambitious? Are you looking for an opportunity for quick advancement? Here's a real "money -making tip"-sound, practical advice from a man who is qualified to give it. No matter what you are doing now-no matter what your experience in the past has been-if you are sincere in your desire to make big money and to achieve something really worth- while, you will read, carefully, every word of this message. nothing surprising about their might be The same story is true of electricity, the dio. There's Thousands of young men who the automobile and successes though. The opportunities are earning big money now-who might later be telephone, the telegraph, of them. Naturally the man to fail, many other fields. Each had its day, and there-thousands America's leaders-are doomed extraordinary opportunties to who is on the spot, who gets in at the begin- simply because they are not looking ahead each offered ning, is the one to profit by them. future. those who got in early. Radio. On and building for the ago, the field of greatest prom- Young men are needed now in In my own life -time, I've witnessed scores A few years on sea, there are opportunities- more pit- ise was advertising. And now-today-a new land and .of conspicuous successes-and even into existence which will and opportunities that offer greater promise And the striking fact is, that it industry is coming in other field. iful failures. in all probability offer more and better oppor- than those any isn't always the clever man who succeeds. in the history of his "grey matter" in tunities than any other field Men It's the man who uses RADIO ! My Advice To Ambitious who plans now for to- industry-and that field is selecting a life work, Here's the advice I want to give to you men morrow. are farsighted-you men who are hon- What field of endeavor offers YOU the More Money For YOU who Learn more for making good! chief in- estly anxious to make good. greatest chance It's been my good fortune as about the field of Radio. You will be amazed for the world's foremost radio school is. Your eyes will The Field In Which structor men for at what a huge industry it to have trained hundreds of young be opened to possibilities for advancement to Succeed radio profession and to have come into It's Easiest the fas- you never dreamed existed. In general, new fields offer by far the best contact with the developments of this Get the facts on Radio. You can easily advancement and big branch of science. I tell you that not obligation at all. opportunities for rapid cinating of the learn all this-without any success. In the old, well -established profes- one person in a thousand dreams In order to help the Radio Industry get the and busi- of this business as it is today. And a sions enormity limits it men it needs so badly, I have compiled nesses, the odds no one can possibly foretell to what wealth of interesting facts on this wonderful are against a man will grow in the future. new industry-facts on the amazing oppor- jumping ahead Take broadcasting alone. Most people helpful advice on just how connection. Hundreds tunities, and some unless `the think of radio in this to go about profiting by them. breaks" favor him of stations have come into ex- cost a penny to get broadcasting of equip- Remember-it doesn't to an unusual de- istence. Millions of dollars worth these facts. You're ambitious. You're on the gree or else he is has been sold, and like the automobile No matter ment this jump for any good opportunity. a genius and business, there will be almost no limit to whether you think you are going into this are -few of the radio business. it. there end of will field or not-get full details on them. But Radio's real growth in the future Simply mail the coupon for my free book But in new not be along the lines of pleasure. Radio Mail it now-while and eco- "Radio Your Career." lines of endeavor, has grown to be the most practical you think of it. it's different. I've nomical form of communication. It is being noticed it time used by every ship on sea. It has been and again. Take adopted by business houses, banks exchanges JAMES A. DOWIE t h e railroads and all progressive firms. The. Government Radio Engineer years ago. I re- now uses Radio in its police service, in the call many of my postal department and almost every other RADIO Dept. 46A VIRGINIA boyhood friends department. who went in "the Already we have classrooms being taught game." Almost every day we hear of some JAMES A. DOWIE railroad by Radio. is Today many of new use for this wonder science. Radio Radio Engineer these ambitious one of our greatest industries today, but as Dept. 46A men, who started yet it has only started to grow. It is the one without any spe- great field of promise of the future! Radio, Virginia cial experience or Please send me without cost or obligation education, n o w Men Wanted In This Field your free book entitled "Radio Your Career" are high execu- on how I can make the biggest is tremendous industry came into ex- and advice en land and sea hundreds tives one This fortunes money in this new industry. (Please write are president of an istence almost over night. Already of big money positions by the most wide-awake am- plainly). men. important road. have been made .calling for trained There's only one bitous men-many of them who seem to me Name explanation f o r to be nothing more than boys, they are so in on the young. their swift progress. They got me to give Address ground floor where there was plenty of elbow I wish that space would permit to hold just a of how younges men, room-and nothing at all was there ahead in Ra- City State them back. So they jumped ahead rapidly. former fstudentss,h, ave jumped When writing to advertisers please mention THE WIRELESS AGE 4 THE WIRELESS AGE JANUARY, 1924
A
$125, MODEL V fully equipped A New and Radical Radi® Achievement
This new Kennedy Model V is one of the The cabinet is built of mahogany foremost and fol- contributions ever made to the lows dignified, harmonious lines that give radio art. It was developed by the Ken- it a pleasing appearance and make it an nedy Engineering Staff to meet a definite attractive addition to any home. The ar- .demand for a receiver with greatly simpli- rangement of the panel is the result of con- fied control-but with the same high stand- siderable study-it is placed at a height ards of selectivity and mechanical excel- and angle that are new and provide an lence that have always distinguished unusual degree of ease, comfort and pre- Kennedy radio equipment. cision in tuning. Dials, knobs and tubes The most striking individual feature of this are symmetrically arranged and tend to new Kennedy Model V is its utter sim- enhance the already attractive appearance plicity of operation. After a single initial of the receiver as a whole. setting is made, only one dial is used to Model V is an entirely new development control all tuning. And with this sim- in radio science-it is unusually simple to plicity of tuning comes the positive assur- operate, ance very selective, has high electrical that, night after night, a given sta- efficiency, presents a pleasing tion will "come in" at its own particular appearance and sells for only $125.00, completely setting-even though the receiver i.e tuned on equipped with all different antennae. tubes, dry batteries, Kennedy 3,000 -ohm phones, with plug. Model V is very selective. For instance, This unquestionably stamps it as the one in New York one of these receivers located striking value in the radio field. in the Belmont Hotel "tuned out" station Ask your dealer to show you the new Kennedy WEAF, only two blocks away, and "brought Radio Model V- or write us direct for fully in" out-of-town stations. It is stable in illustrated literature. Other Kennedy models operation, reproduces music and voice with in periodfurniture designs range up to $825.00 unusual fidelity and is credited with re- fully equipped, including built-in loud speaker. markable distance records. "Re -radiation" THE COLIN B. KENNEDY COMPANY is practically eliminated. Responds to all SAINT LOUIS SAN FRANCISCO broadcast wave-lengths-operates on any All Kennedy receiving sets are regenerative. ordinary antenna, outside type preferred. Licensed under Armstrong U. S. Patent No. 1.113,149.
KENNEDY '23 o c/`,adi,o
When writing to advertisers please mention THE WIRELESS AGE THE WIRELESS AGE 5 JANUARY, 1924 randes -Talker 'TableTRADEMARK REG. U.S. PAl. UrF.
-- When writing to advertisers please mention THE WÍRELESS AGE (-) THE WIRELESS AGE JANUARY, 1924 What you have been waiting for HERE are two rugged little storage batteries niceties designed of adjustment that make radio receiving particularly for low -voltage tubes. an unalloyed pleasure. Although they weigh only 5 and 6 pounds, they are of true Exide quality. Highly efficient The Exide A Battery for six -volt tubes has and with ample power for long-distance receiv- extra -heavy plates, assuring constant potential ing, these batteries will give you a type of and uniform current overalongperiodofdischarge. service that you would find it hard to duplicate. Like all Exide Batteries, These sturdy it embodies the finest little batteries are neat and com- materials available. pact. They were specially designed for WD -11 and UV -199 vacuum tubes, but can be used with any low -voltage tube. The two -volt Exide A In marine and Battery consists of a single cell. It will heat the commercial wireless filament of a WD -11 or other quarter -ampere tube for approximately 96 hours. On sea and on land the The four -volt Exide Exide B Batteries A battery, having two cells, will light the filament plays an important role in the industrial life give noiseless, full -pow- of a UV -199 tube for 200 ered service over a long hours. of the nation. In marine period of discharge. De- signed throughout to pre- wireless, Exide Batteries vent electrical leakage. provide an indispensable Capacity, 3 ampere hours. Service you will store appreciate of emergency cur- rent. A majority of all government and com- mercial Exide Radio Batteries are wireless plants are equipped with Exides. carefully constructed on Exide Radio Batteries are sold by radio deal- sound engineering princi- ers and Exide Service Stations everywhere. ples. Ask For six -volt tubes They give the kind your dealer for booklets describing in detail the Like all Exide Storage of service every radio Batteries, fan complete line of Exide Radio Batteries. Or write the Exide A would like to get from Battery for six - volt his direct to us. tubes is dependable and storage battery. long-lasting. It is made in four sizes, of 25, 50, As you know, any varia- 100, and 150 ampere tion of current in hour the plate capacities. circuit produces weird sounds in your phones. With an Exide B Battery hooked up to your set, static is the only undesirable sound you will have to contend with. The Exide B Battery supplies steady, xiôe noiseless current. It permits the RADIO BATTERIES THE ELECTRIC STORAGE BATTERY COMPANY, PHILADELPHIA Oldest and largest manufacturers in the Service Stations Everywhere world of storage batteries for every purpose Branches in Seventeen Cities When writing to advertisers please mention THE WIRELESS AGE AGE 7 JANUARY, 1924 THE WIRELESS Licensed under Armstrong U. S. Patent No. 1.113,149 A,TeTH THE -.. ^.^THE AMERICAN RADIO RELAY LEAGUE ILASo LE RADIOGRAM etn vuer.. nAmt. -nor_...urr.w.,e ...... _...... if4-_. _.._ ...... w.-...<. e.ur m,.No.eew.uo. OM uno a,u,erm.nu -J uam TILT ems -mamarme. wade mamma w ALL mar re urn. rem dc,aea ow.rw,.rm.wrn.raaw«w+ Inside the Arctic Circle, nine degrees a little 89 -foot schooner is from the North Pole, Model 4R-The new Zenith 4R "Long -Distance" in the ice of Smith Sound. Aboard comprises a complete three - frozen fast enduring, Receiver -Amplifier type. this schooner a group of brave men are circuit regenerative receiver of the feed-back of the Arctic- the Zenith regenerative circuit in they can, the desperate cold It employs three - as best below zero. combination with an audion detector and cold that often drops to 60 degrees amplifier, all in one cabinet. field of ice! stage audio -frequency unusual Human atoms in a boundless Because of the unique Zenith "selector," terrible is the is accomplished without complication of Cold is hard to endure, but far more selectivity oppressive. Radio, at adjustment. any Arctic solitude-unbelievably The Zenith 4R may be connected directly to this spell forever! without the use of other amplification length, has broken loud-speaker may be for full phonograph volume, and reception Concerts from Honolulu! satisfactorily accomplished over distances means of powerful sending and receiv- of more than 2,000 miles $85 Daily, by are in ing apparatus, the crew of the "Bowdoin" with relatives and friends in the communication as far far-off States. Daily they listen to concerts away as Chicago, Dallas, and Honolulu! the very lives of one's shipmates When the sanity, world, may depend upon contact with the outside none but the best is good enough. Zenith Dr. MacMillan's Choice-the -Distance" Dr. Model 3R-The new Zenith 3R "Long Out of all the radio sets on the market, combines a specially designed Receiver -Amplifier with the super- MacMillan selected the Zenith exclusively-because distortionless three -stage amplifier selectivity, three -circuit regenerative tuner. of its flawless construction, its unusual efficient Zenith with the tremendous reach. Fine vernier adjustments-in connection its dependability and its aperiodic or non -resonant "selector" in unique Zenith selectivity. his operator, on board the "Bowdoin" primary circuit-make possible extreme Already hundred -Speaker Northern Greenland, has tuned in several 2,000 to 3,000 Miles with Any Loud who brag a little has broken all records, even stations. You along th : Atlantic The new Zenith 3R line. would you by its famous predecessors of the Zenith you tune in Catalina Island-what those set 2,000 to 3,000 when Satisfactory reception over distances of if you tuned in Hawaii from the Arctic Circle? accomplished say miles, and over,a is readily Nll The set that Dr. MacMillan has is a standard volume, using any y loud-speaker. And you can do all that special skill is required. Zenith receiving set. set built which is capable of more, with either of the two The Zenith is the only as MacMillan does, and used with all present-day tubes as well right. Their moderate being in the future. new models shown at the with any tubes that may be brought out easily within is compact,graceful in line ,and price brings them The Model 3R cabinet $160 your reach. Write today for \ built in a highly finished mahogany G full particulars. 11. Dept. ZENITH RADIO CORPORATION. Illinois Zenith 328 South Michigan Avenue, Chicago, IGentlemen:- on Zenith Radio. Radio Corporation Please send me illustrated literature McCormick Building CHICAGO WIRELESS AGE When writing to advertisers please mention THE 8 THE WIRELESS AGE JANUARY, 1924 Ken nllllll ...... Illau'II' v ul III iV DlllnIrI I II, IItlll9 111!1,1,11,11t II1 III111111111111111111111111hIIIIiII IIII !1I 10.. .11.11 "DyIIIIUdlllll IIIII IIII Obi 1111111111111hI IIIIII' IIIICIUIIIII ,Il l, Illlllul' .dIIIIsllllll II!IIIII II l.I rI IIIIIIIIIIIh II IU' ' IIIIII IIIIII ulll I-1.1uwIIIIII , IIIIIIIIiIr "I TileThe World's Standard Loud Speaker 'IWI1,1b' 'I illlll 11 11100,0IIDIIUIIWuu' IIIIIII l' Il l 11 11141 II III'I uIIIU ; II)I, II ,'I A Few Ilill1'.., Rubber Busg Irl¡ Insulating - Wooden Horn Practical from Metal Sound Points About Conduitfr Amphon Supremacy The Amplion requires no power Metal amplifier-no battery. Sound You simply attach it to regular head phone Conduit Rubber Bush- connections. Highly ing Insulating The diaphragm is made Finished Sound Conduit of a special alloy, found to have from Reproducer no equal after years of experiment with all other materials. The electro -acoustical device is insulated entirely Nickel Plated from the horn to eliminate distortion, Hinged Stand for ring or resonance. LoweringorEleeat. Its Non -vibrating ing Horn wood horn surpasses all other materials for true tone and clearness. Spewrew for adjusting diaphragm to meet all conditions of Rec. Sets An Adjustable feature makes the Amplion sound true Amplion Deagon AR -19 with any make of receiving set, and ensures faithful $40.00 reproduction. The Amplion mechanism is not new- it has not hurriedly been devised to meet the radio boom. Rather, it is a development, for radio purposes, of a loud speaking device used for years by leading Navies of the world. The Amplion is manufactured by the oldest manu- Phonograph UnitAR.35 facturer of loud speakers in the world. $24.00 The Mahogany horn-the enameled sound conduit- the highly polished nickeled base - the reproducing mechanism-all are of the highest quality. Ask your dealer for a demonstration. Patentees: ALFRED GRAHAM & CO. Beauty SIGNAL ELECTRIC MFG. COMPANY AR -15 Sole United States Distributors Menominee, Michigan $46.00 BURNDEPT OF CANADA. LTD.- Canadian Distributors - 172 King St. W., Toronto Amplios Junior AR -39 $26.00 $18.00 II' lllllhml,l,,,. Amplion Portable AR-61 II' l'°IIIIIIIIIII!nlllhl $50.00 \l'Immi- II 111,,,1.,...,;.11,lunllU ,.IIUI,r;;;r!IIIIIII I IIII°1111 yll,1 ., l ulul'I;,..I" I 7QUALITY SOCKET plus A QUALITY TRANSFORMER PLUS A QUALITY AMPLIFICATION RHEOSTAT by General Radio amplifying units saves time, money and patience. They give satisfactory, distortionless volume and a lifetime service. Guaranteed MAKES A QUALITY Types Prices AMPLIFIER 300C for U V 199 tube - $7.75 300D for U V 201A tube - 8.25 Write for free descriptive bulletin 916W AND MADE GENERAL RADIO CO. BY Manufacturers of Electrical and Laboratory Apparatus MASSACHUSETTS AVE. and WINDSOR ST. CAMBRIDGE, - - MASS. When writing to advertisers please mention THE WIRELESS AGF: 10 THE WIRELESS AGE JANUARY, 1924 r iW+1+W1tl+1+ll1+1+W+11t111911+1+11111i011111TllTllil cZ Ati as LOUD SPEAKER tia tu.al Re?Pi&ìction N pp1iK1T :.+;W.. 1j25 ,aet, celxroºN1^ oowyer'00. swN ee yrodnRePr°jeit5 N altlºlueyqerB cel $ g3 o spot' tc is =or °tsó 9 ó ára° ' lntereyona giAnB= tie 55sÓ. r0i Centle SW tles et etor9 eb°rnr ete 1t51n.altn,SW ¡v5 ºrt °c°oWéa ° oº' ntei é é e ° ie e oo t f ÿps °pe lree ea gnfd SnaH ° 5ht laee l ptie ts cs= `né s -ºt°9)St Dpe bot Yre°e°^ 1°°déonN 5tñ5T tn ºt S°: ' aº l; erslltto °Dula Se %T°0.n° tb^ ºl°N 'T 1 S É15a1} Se °nanr teb°tt°r190°tlte°lttb n°,yc ea N e C90L tu trn14 L4º5tn5 aerJ ea Ye°r5 A Record TRADE MARK gIVANIVAVVAUVAIVAWIWAIMAIINIANIMINAMAINIJAVIIMUVAYMAJUA NTHUSIASTIC TESTIMONY straight c from an impartial authority. Re -Production 3:E is a fact. The delicate overtones which give ie music its roundness, resonance and timbre, are faith - e fully re -born through the modern magic of the pat- 3 ented "double diaphragm." This extremely respon- device is adjustable to the exact requirements Ask Your Dealer jsive for a of your set and individual receiving conditions. Demonstration Write for Illustrated Booklet "C." List Price Atlas Loud Speaker Unit Complete c With Phonograph Attachment $13.50 Without Phonograph Attachment $12.50 Letters from Users Requested What have you accomplished with your Atlas - Amplitone? Tell us about it. c Sole Canadian Distributors The Marconi Wireless Telegraph Company of Canada, Ltd., Montreal, Canada X25, Multiple Electric Products Co. Inc. ORANGE ST., RADIO DIVISION NEWARK,N.J. u, V u, u u u u u ;l10.1111.1 11111.111 ull u rIaau11nunNIIN1111u11aua11uIIMAauaau11 0au1111unau11auaaua11uaaunnunauaau1auaaunau11auAaur11un ' When writing to advertisers please mention THE WIRELESS AGE 11 JANUARY, 1924 THE WIRELESS AGE RAecimAY LEAGUE Aura äls !Ili TOO.,.,.. EXECUTIVE HEADQUARTERS HARTFORD. CONNECTICUT 9BP Radio Station Experimental Canada. Rupert, B C Prince 1923. September 26th, Morgan Company, Messrs. Adams J. Upper Montclair, N. with the Dear Sirs:- am very pleased before that I another victory s advised you but here is to MacMillan' I have be interested "PARAGON APPARATUS" you will of my which I feel results APPARATUS " Link with for "PARAGON know. which left Wiacassett, Expedition Schooner "Bowdoin" Arctic equipped radio. The June 23rn the odiw by amateur 23rd. on board outside world Civilization on June with the or y Da Maine in touch heardr to do until thtoinD erepable to theátgotint at the A Paragon Radio Receiver This they North of After going dabecamebworried s thisr dependable link And all interested is the most expedition. aboard the The apparatuspp cour- apparentxp silence.s the receiving into and between MacMillan's acship's o'n duplicate of amateur to gethave offereße the first I had a civili- account, to This prize ageous explorers and adpp edition. RÁ_10 Regener- the "Btidoin"Arctic PARAGON Typefist. hear of their with aid pof my zation eager to honor withrthec Detector -Ample ati honor toDA-2Type PARAGON doings. Receiver and the "Bowdoin" ative with Oin" communicationcolmn Refuge Har- Read this letter from Jack getting into arisnn in at Since first g ,inter quartersNorth,Latitude whose Paragon Re- hich are of Greenland working8.W Barnsley bour, ten miilesmiles North 78and one which is September 600 ao d ceiver has been picking up bour, West) on copied onev World' 72.30 and have the New York Longitude the oPoperator to and these vitally important mes- withre them addressed the expedition schedule oe from from wordpith private messages of sages, picking up every one, dozens (a total forward- with r calls heard 546 caa)b together of amateurat to 20 gettingevery word clearly. complete list 28th September and a from July destinations. the ^Boodoih" their Receiver could these messages hundreds A Radio ed all of has heard the expeditionexpo stationhs1ea have no higher recommen- consider that ma When you Arctic but to in have beenocommunicate,able and glad dation. of theyt APPARATUS"Teoviag onetihnawith whomrd for "PARAGON aamarlads the onlynyur a am of my Bulletins on ParagonRadio quites proud I Illustrated conaidablehto dvise q ourehow Products are yours for the asking. to be yours very ern ADAMS-MORGAN CO., 8 Alvin Avenue, Upper Montclair, N. J. When writing to advertisers please mention THE WIRELESS AGE -' THE WIRELESS AGE JANUARY, 1924 THE BURGESS "A" BATTERY Introduces a New Silent Partner 111A3111121I II Notice that: he's exactly BURGESS my size-same height- BURLES I A same width same ßATmY - BATTERY rov NPY cus V12=11011111 VACUUM Tuees weight. We look like RADIO II SERVICE WNSli8 11[RY twins. (He's good look - i ing, too.) Look us over. r, BURGESS is a big family. Your radio set is no better I have a lot of brothers. than your batteries. Without Perhaps the most famous of them would be like having a them is BIG BROTHER "B." marriage license and no bride. He had the field to himself One is no good without the until Burgess introduced other. VERTICAL "B." Try it tonight. I'll heat your Now comes my new partner. tube filament while my twin He is VERTICAL "B" partner takes care of the plate JUNIOR. He has the same 221 circuit. volts of pep as the rest of the A Laboratory Product Burgess "B" family. He is quiet never talks to himself, and - BURGESS BATTERY COMPANY he never lays down on the job. ENGINEERS - DRY BATTERIES MANUFACTURERS FLASHLIGHT - - RADIO - IGNITION - TELEPHONE GENERAL SALES OFFICE. HARDIS TRUST BLDG., CHICAGO Burgess calls us "Work - LABORATORIES AND WORKS: MADISON. WISCONSIN BRANCHES Mates." He ought to know. We NEW YORK BOSTON KANSAS CITY MINNEAPOLIS WASHINGTON PITTSBURGH ST. LOUIS NEW ORLEANS are silent partners in your IN CANADA PLANTS: NIAGARA FALLS AND WINNIPEG BRANCHES radio entertainment. TORONTO MONTREAL ST JOHN 'ASK ANY RADIO ENGINEER' urtGEssr y, RADIO BATTERIE" When writing to advertisers please mention THE \CIRS;LESS Mir I.> JANUARY, 1924 . THE WIRELESS AGE CI an easy chair at home MAGNAVOX gives you the melody of concert and opera NAVOX adio ,Reproducers and Amplifiers ?: - c_,..f c THE secret of the marvelous results ob- tained with Magnavox Reproducers does not lie in any one feature (such as the shape or material of the horn) but in the correct working out, in all features, of correct scien- tific principles. No receiving set is really complete without Magnavox. Magnavox Reproducers horn and 1 stage of amplification $59.00 R2 with 18 -inch curvex horn $60.00 of electro -dynamic R3 with 14-inch curvex horn $35.00 A2 -R consisting with 14 -inch curvex 14 curvex horn. Reproducer M1 with -inch horn and 2 stages of amplification Requires no battery for the field. $85.00 $35.00 Magnavox Power Amplifiers Combination Sets Magnavox Al-new 1 -stage . . . . $27.50 Al -R consising of electro -dynamic AC -2 -C -2 -stage . . . . $55.00 Reproducer with 14 -inch curvex AC -3 -C -3 -stage . . . . $75.00 Magnavox Products are for sale at Registered Magnavox Dealers everywhere. Write for new 32 -page Magnavox Radio Catalogue. THE MAGNAVOX CO., Oakland, Calif. or every New York Office: 370 Seventh Avenue Receiving Set Perkins Electric Co., Ltd., Toronto, Montreal, Winnipeg, Canadian Distributors 1R there is a MAGNAVOX When writing to advertisers please mention THE WIRELESS AGE 14 THE WIRELESS AGE JANUARY, 1924 h'avt AY, Bill! Go to the HY continue to preach to a handful Show?" V V of people when by advertising and "Chicago? Bet- modern business method you can get chalif e. Everybody went. a crowd?" So a divine is reported to have ex- Great stuff. Best radio claimed in an address at the New York City show ever." Club recently. Why go to such length to col- That seems to be the lect a crowd in the name of religion and for the common assent; best radio show ever. The exercise of its various forms, when broadcasting great middle west is thoroughly responsive to- will send into the homes of the land, where day to the appeal they of radio, and the Chicago will be received by the callous- and worldly - Show must be taken full stock of in all its in- minded as well as by the bedridden and helpless, teresting incidents, as an index of radio progress. messages of faith and hope and charity straight * * * from the finest religious minds? WITH Radio Broadcasting already de- Many churches are broadcasting their services veloped into a mighty nation-wide as a regular institution, and even a report has agency, we are approaching close to an reached us of one small rural parish which has important political campaign in the course of dispensed with the service of a preacher and which the political possibilities of broadcasting gathers together in its church building to listen will be surely exploited to the utmost. Who can to the service of a metropolitan church. Only guess what the ultimate result on our political very recently a Bible Service bureau was incor- machinery and our national character will be? porated at Columbus for the purpose of giving The political strength of the Roman Empire to the world a daily scriptural message by Ra- was cemented in its splendid system of com- dio. munications. It is many removes from the re- Radio is no more commercial than the ser- lays of runners on the Roman roads to the vice in which it is employed. It is the newest broadcasting of a President's Message. hand -maiden of Civilization and its service will be spiritual as well as material. * * * * * * HELP Wanted: Licensed radio operator by X Y Z Airline Co. AREADER of THE Shall we see columns of this adver- WIRELESS AGE tisement in the newspapers of tomorrow? writes that he con- When industry takes a leap ahead of prog- curs heartily in the hope re- ress it is time to hot -foot for a telescope with cently expressed in our edi- its focus set on the future. An Akron company torial columns that B. C. has purchased all rights and patents to manu- L.'s would come across facture Zeppelin dirigibles. Back of this bold more generously and graciously with bouquets. venture lies a confident belief in the future of He says, "I for one feel profoundly grateful for the dirigible as a commercial practicality. Ra- the joy and instruction that radio has brought dio lends a two -fold factor of probability to the to my home," and goes on to state that "rather success of the enterprise. The safety of air than miss telling of my thankfulness I have travel will probably be largely dependent upon placed near my set some personal postcards, on radio reports of prevailing weather conditions. which is printed the form inclosed herewith, Furthermore, regular travel by air is inconceiv- which can be mailed at once and their presence able without perfect control communication, means that there is no delay or failure in at- which radio alone can furnish. tending to this duty." The lack of natural obstacles away from the Thank you very much for the privilege of surface of the globe, if only the difficulties rep- hearing you on the radio from station resented by wind and weather can be overcome, at p m. Eastern gives possibilities of a mode of travel untram- Standard Time. meled by expensive installation. Compare the We especially enjoyed limitations of the highway, continually being Address. worn away by the stream of traffic jammed un- Such a little thing to do! Yet how perfectly comfortably within its narrow pavement-with fine! Better get into line and get some post- the wide avenues of the air! Think of the ad- cards printed. vantage of traveling above the pounding waves A couple of our readers have protested-and through which the vessel must plow her way doubtless others have the same thought-that with the expenditure of tremendous power. Once after mailing one's bit of enthusiastic apprecia- we grant that air travel on regular schedules is tion to the broadcast station it comes rather assured-and we are promised by this Akron as a freezing douche to receive in reply the for- enterprise that it is-there is no limit to the mal and stereotyped: "We are glad to receive evolution which will ensue-an evolution which your comments and wish you would write us will involve undreamed-of changes in human often, giving suggestions, etc." or perhaps no institutions and modes of life. acknowledgment at all. We will ask such dis- Railway systems are dependent upon their couraged persons to try to picture the inside perfect and elaborate signal control. When the of a broadcast station with a very limited staff day shall come that will see trains of air -cars trying to bestow as much as possible of its traveling at great speed on established routes budget into effective service and better pro- and schedules, Radio, furnishing the control, grams and trying to keep from closing down will be called into a new task and a new oppor- and the reason for lack of individual replies will tunity. be apparent. 1: :r JANUARY, 1924 THE WIRELESS AGE 15 Specialists In Moulded from BAKELITE "SHAWLAC" In Appreciation BEFORE starting what unquestionably will be the biggest year in Radio, we want to thank our friends for their loyal support during 1923. We realize our indebtedness to them. TRANSCENDING in importance our large modern plant, unexcelled equip- ment and the finest kind of a working force, our relations with those who buy our goods are the very foundation of our business. And so on the threshold of 1924 we pause to wish you all A Most Happy and Prosperous New Year 1924 holds out wonderful promise to us all. RADIO is growing-it is estimated that there are between four and five mil- lion sets in this country already. And the farm field is only scratched-when it really opens up-look out. Be ready for sales-bigger than you have ever had. THE manufacturer of today should be planning ahead. His sales and produc- tion should be all laid out. Raw materials should be purchased, new machin- ery-new dies ordered and installed. Peaks and valleys of production and sales must be flattened out We earnestly urge the necessity of all these things so as to prevent a repetition of delayed production and the resultant loss of sales. OUR Sales Engineers are at your service. A card will bring one of them to your plant to talk over your problems and entails no obligation to you. SHAW INSULATOR COMPANY FOUNDED 1892 Works and Office HENRY M. SHAW, 150 Coit St. President Irvington - Newark FRANK H. SHAW N. J. U. S. A. flee Pres. & General Mgr. When writing to advertisers please mention THE WIRELESS AGE 16 THE WIRELESS AGE JANUARY, 1924 Tye de % `eNNNc et{ t Teh ,,oST {%f r Mak g it Easy to sell Crosley Produc Back of the proven quality of Crosley Radio Receivers and parts From the two -tube Crosley Model VI at $30 to the beautiful Con - is the consistent Crosley advertising which is educating the public solette Model X -L at $140, we believe the Crosley receivers are the to the merits of these instruments and creating an ever increasing most remarkable sets ever offered to the public regardless of cost. demand for them. Above is reproduced a full page advertisement The Model X (ten) -J illustrated above is a 4 -tube set combining that appeared in December in the Saturday Evening Post, one stage of radio frequency, detector and two stages of audio Country Gentleman, Popular Mechanics, and all the leading frequency amplification. radio publications. It is the first of a new series Write for Complete Crosley Catalog, sending us that is bound to bring big results. ellaStry the name of your Jobber. If you handle the Crosley line, you are offering to An Enlarged Reproduction of the Page Advertise - your customers the best known, most successful Better Cost Less ment Pictured above will be sent on request. line of radio products ever produced. Radio Products It makes a very attractive Window Poster. CROSLEY MANUFACTURING COMPANY POWEL CROSLEY, JR., President 128 Alfred Street, Cincinnati, Ohio When writing to advertisers please mention THE WIRELESS AGE THE WIR. LESS AGE Americú Foremost Radiophone Review" 4 VOLUME XI JANUARY, 1924 NUMBER e.fflmeeK.95 Colonel Birdseye's Exploring Party Keeps Radio Contact With the World While Thousands of Feet Down in the Canyon By Max Abel RADIO fans who sometimes com- In addition to the usual instruments plain of the difficulty of rigging used by engineers and geologists the an aerial on the top of a dwell- party had a radio -receiving outfit- ing or even in the woods about camp by Aeriola, Sr.-which was modified for using tree tops as masts for the pleas- the trip by R. L. Atkinson, the expert ure of picking up broadcasting, should mechanician of the Geological Survey. listen to the story of DX reception in On July 18 the party left Flagstaff, the Grand Canyon of the Colorado as Arizona, the railroad station nearest told by Col. C. H. Birdseye, of the to the point of departure, for Lees United States Geological Survey, who Ferry, 140 miles away. Here they re- has just returned to Washington, mained, under stress and distress of a D. C., after a trip of 300 miles through temperature that reached 110 degrees the roughest waters in that mighty in the shade nearly every day, putting chasm. The dominant purpose of the the boats and equipment in order. trip was to make an accurate survey On August 1 the party left Lees of the canyon and to locate sites at Ferry and camped that night at the which dams could be built to utilize the head of Badger Creek Rapids, 7/ wasting waters for flood prevention, miles below Lees Ferry. Here the power development, and irrigation. radio set was tried out, and in spite of Colonel Birdseye tells a graphic adverse prophecies, some of them story of the trip down the canyon, widely circulated in print, that a radio which was made in four wooden boats, set could get nothing in the depths of supplemented by a canvas canoe. the canyon, KHJ, at Los Angeles, was although the canyon here These boats carried all the supplies and heard plainly, Colonel C. E. Birdaeye, Chief of the U. S. instruments of the party and also, ex- is narrow and nearly a thousand feet Geological Survey Grand Canyon Exploration cept at portages, the men themselves. deep. From this point down the party 17 18 THE WIRELESS AGE JANUARY, 1924 at the mouth of Kwagunt Creek the men thus camped in the depths of the canyon heard and enjoyed, the items of the daily news and the baseball scores, as well as the fine concerts broadcast from Los Angeles. At this point the top of the canyon is 5,000 feet high. VISITORS CAUSE COOK TO WALK OUT On the evening of August 29, the party camped at the mouth of Hermit Creek where a good flow of drinking water was found, and was joined by Colonel Crosby, Superintendent of Grand Canyon National Park, and a large party that had been made up to see the boats run Hermit Creek Rapids, the roughest kind of a stretch of water. The influx of so many visitors threw the cook "up in the air" and he threatened to leave the party at Bass Trail, the next stop. The party had The been receiving radio Grand Canyon Survey Party. Colonel Birdseye in center of picture messages about the impending coal strike, a threat- canyon the radio outfit was set up ceived from KHJ at Los Angeles, ened industrial and domestic calamity, from place to place and received mes- though not without great static inter- and some of its members had vivid sages from Los Angeles, Salt Lake ference. recollections of domestic trouble about City, San Francisco, and on one occa- August 12, the party reached Nank- cooks, but here was a "labor situa- sion from Colorado Springs. oweap Creek and found a small tion" right in the canyon that looked The radio outfit which enabled the stream of clear water-a decided lux - bad, and culinary service at once as- party to keep in touch with civiliza- sumed a high value. However, as he tion consisted of an Aeriola was evidently Sr., with FOR three months the intrepid Geo- to be lost to the party, two steps of amplification, using U.V. logical Survey Party, conducting a new cook was sent for. 201-A tubes throughout, which had their own 300-mile survey through the For a number of days the radio tortuous depths out- been modified in the instrument shop of the Grand Canyon, fit was out of commission due to a of the Geological were able to keep continuously in touch broken Survey to meet con- with the civilized world through their "pig -tail" connection on one of ditions which were to be expected in radio apparatus. Three thousand feet the rotors, but on the evening of Sep- the canyon. This set, together with below the canyon rim and hundreds of tember 8 at the mouth of Tapeats A and B batteries, was placed miles from the news centers, they Creek, the radio in a learned outfit was again in use waterproof box, so that in of the death of President Hard- and KHJ came the event ing three-quarters of an hour after the in clear. The party of the overturning of the craft in occurrence, probably before the ma- then heard that a serious earthquake which it was carried, there would be jority of the people in the big cities had occurred in Japan and that the knew no danger to the instrument. The an- of it. A mile deep in the great Washington baseball club had won a tenna wire, 150 feet in length, chasm they heard the news of the ter- game. Here, too, was rible earthquake in Japan. And finally, the walls are nearly carried on a small reel to facilitate after months of trying adventures, they a mile high. winding on moving camp. had the Prior to unique experience of hearing NEWSPAPERS TELL OF DISASTER TO breaking camp arrangements had been a broadcast announcement of the safety of their party. THE PARTY made with the Los Angeles Times On October 2, after running many (KHJ) and Desert News (Salt. Lake small rapids and escaping ury to men who had a 20-foot City) (KZN) to broadcast items of been drinking the rise in the river, the party reached interest to the party. water of the ever muddy river for Diamond Creek, nearly 164 miles below the At Soap Creek Rapids, about 11 two weeks. In camp that night (Continued on page 78) miles below Lees Ferry, camp was made where the party learned by radio of the death of President Harding, three-quarters of an hour after it oc- curred-probably before the majority of people of the United States had learned of it. Here the rim of the canyon is 3,000 feet above the floor. On August 8, the boats passed Vasey's Paradise, 31 miles below Lees Ferry, so named by Maj. J. W. Powell, the first explorer of the Canyon, in honor of George Vasey, a botanist, who would have found the numerous ferns, mosses, and other plants here a very interesting study. The party filled their canteens, ex- plored..a large cave, made surveys of a possible dam site, and camped on the limestone ledges at the head of another rapids, where radio messages were re- Trying out radio receiving set in the Grand Canyon 19 JANUARY, 1924 PICTORIAL SECTION President's Message Broadcast dr.=-r á ' y.r' ti e ' -, sä 5.e g 5.i _ x _ _ ; ;x , - = : i li I _-, George A. Wier, of sta- , tion WCAP_ operating the rzeio amplifying ; k-,...- first message to Cos.ress, a pro- ¡ _, , control from the gallery . Presitien! Csoiidje's e.,' \ reouncemsr.t of iremendous political impartaºece, was `;t, while he 7n?srage was reet to the country b.; radio :` , delivered delivered l -?'-s\\'-- . u. .a\\\` 8 f - ï , ' .- ; `:` - E vSrr ,, .. ,.....-:'-et... .. alt+ r. _f,f re' t',Jt"i' e_ -a..."--3.- ^' While official Washington, including the representatives of foreign powers, crowded the galleries of ate great cham- ber in which the Senate and House of Representatives were assembled at noon on -December 6 to receive the Presi- dent's message, radio fans all over the eastern half of the country listened to the address through their receivers ASHA Bunchuk, solo 'cellist of the Capitol Theatre Orchestra which broadcasts such popular concerts. " Roxie " says this 'cello is worth $18,000, so no wonder this artist's music is so delightful. ?1 JANUARY, 1924 PICTORIAL SECTION Some Interesting Broadcasters á. e Chief Crawler is ill at ease be- fore the micro- á e phone. Read on a page 27 haw W radioed his war -whoops Here's the little chap with the big voice whose heart- throb songs de- light listeners -in to Capitol Theatre concerts - Wee Robyn $ Willie Y i..., u.____-_------\ -- ;'.. -\ ,a : .: . ua\au\ . \\\\\\\\\.\\a Florence Macbeth, leading colora- - tura soprano of the Chicago civic c.< opera company, who has become a favorite with radio fans THE WIRELESS AGE JANUARY, 1924 World's Leaders Use Radio r - - i `\ A n \-á' , : OacGr S. Straus broad- casts Ail message o2 "A Cons-uctive Program for oaerese Peace' from station -.-.--.:_- , .- : WJd.7, Philadelphia The political arena is all set for 19934. Here we have Senator áHiram Johnson driving home his >44..1A argument before the micro- \\\\\\\\\\\\\\\\\\\\\\ C\ hone , ` - \\\\\h\...-.\\\\\\\\\\\\\\\\\\.\\\\\\\\\\\\\\\\a..-\\\\\-c...\\\\\\\\\\i. Mrs. Mary Roberts Rinehart, whose mys- tery stories, to say nothing of e her lovable ate. characters Tish and "K," are the delight Dr. Paul of novel -readers Kammerer, one of the foremost biologists, over the English-speak- \r comes to America ing world is shown here broadcasting to explain his proof of Darwin's her Theory of Heredity. Dr. Glacier Park adventures from WJZ Kammerer spends a few moments each day in radio diversion Broadcasting Congress Shall the Nation Sit in the Congressional Galleries ? By Otto Wilson for WITH Congress again holding in Indiana or Missouri could have there one forth in Washington the idea picked up his radio receiver one day the Supreme recurs, "Why not install a toward the close of the last session and Court ?" . "Not a chief broadcasting device in the Senate and listened to the oratory of the House, , Not alone the Presi- the House and let the people of the he might have been prepared to hear a jani dent's message, but country listen in on the proceedings of profound discussion of our foreign re- But there specially important their political servants ?" The present lations or a ringing appeal for help to is a separate debates might be session promises to be filled with fight the farmer. But this is what would janitor for broadcast and excitement. The Congressmen actually have assailed his ears : the Supreme from the Northwest are up in arms, and "I notice every afternoon and every Court." since they have the balance of power evening when we have a night session "There must be." in one we have three in both houses they are not going to be that shortly after adjournment the "Then building into silence. Then the corridors are filled with smoke. I am separate janitor forces. Why could steam-rollered one head, so issues that will be fought back and they not all be put under one chief jan- forth will play a large part in deter- that we would have only success or failure of many itor ?" mining the might make presidential booms, including that of "I think the gentleman President Coolidge himself. What that recommendation." at least twe positions could be more interesting to the politi- "It will cut out cally minded than to be able to pick up as chief janitor." the gentleman think that the a receiver and hear Senator La Follette "Does Magnus Johnson doing Senate would agree to do that? They or Senator janitor battle with Senator Watson or Senator want to control their own Cummins on the question of guaran- force." teeing the farmer a price for his wheat "If we called attention to it the or of taking over the railroads of the people at home might persuade them country ? to agree to it." It could easily be done, but it prob- "Mr. Speaker, I ask for recognition the ably will not be and for one very good told that the smoke is emitted by in opposition to the resolution." paper in some of the reason-the country would be bored burning of refuse "The gentleman from Massachu- here. I do not think that is stiff in an hour. Usually we think of fireplaces setts." Congress as debating seriously the big a very sanitary plan. I do not think of the House should be And so on. We can imagine how questions that shape the country's the corridors be filled with smoke, because rarely is the absorbed the radio listeners would destiny. Of course it does devote in the corri- Na- from the outside allowed to come in in the question of smoke hours and days to the League of air how quickly and here. I think that practice should be dors of the Capitol and tions, the revision of income taxes, aroused, as the worthy and occasionally discontinued." they would be such broad subjects, member of the House suggested, to galleries is lucky "I think that situation has been cared the visitor to the rise up and demand that the Senate sit in on a tense and historic for. I am so informed." enough to last, should stop immediately having a jan- debate. But by far the greater part of "Oh, no. Only the night before when we ran until 11 o'clock, when I itor all its own. came over here from the House Office Of course there are occasions when Building at half past 11 there was the American people generally would smoke in the corridors." give a good deal to hear what was go- "I am sure the gentleman is mis- ing on upon the floor of the two houses taken about that. I think that must of Congress. Thousands would have have been because of the members tuned in on that session in April, 1917, smoking as they were going out." when war with Germany was declared, "Oh, no. I know the difference be- and there are many lesser occasions tween cigarette smoke and smoke from when the debate is tense, dramatic, and burning paper. It is an abuse that of the highest moment to the country. should be corrected." Probably after a while some arrange- "The situation the gentleman men- ment will be made by which these tions is an abuse and should be cor- special occasions will be provided for rected, and I think it will be." and the people will be enabled to hear "How many chief janitors have history directly as it is being made. we ?" But for the present there apparently is "Just one as I understand it." no special demand for such arrange- is no plan to provide it. "They have one in the Senate draw- ment and there the time of Congress is spent in grind- be made to a year ; and we have one for One exception should ing laboriously along on plain govern- ing $2,000 the House drawing $1,800 a year. Is that statement. When Mr. Coolidge grist. Sometimes the proceedings in the ment there one for the Supreme Court?" addressed Congress radio fans are funny, once in a while highly dra- able to catch his words as was referring only to the House East were matic, but most of the time they are "I he uttered them. plain tedious. If, for instance, the organization." just building. Is (Continued on page 29) eager political student in a back county "This is just one Capitol 23 i:"_a.aoaaa,_..,..,.oa _,L,cvoarar',cac'n,r3rrorvo-.r-,r-ioo--,r-,r.,a-,r--m--,%mxrm . ìuc ,r---m-,r--orr r,r9t í, A 100,000 attendance marks the Chicago Radio Show ;,= as a big stride forward in the development of real ü popular interest. ar =:.,...,_.,,_,,..,,.._,,..,,..,,-.,,._,,..,,_.,,..,,.,,..,,..,,.,,.--.,,..,,..,,.;.,._.,,..,,.,r-,r-,r---,r-,r-,r-,r-,r-.r-,r-,,r--,r',.-,r',r-,r-,r-,r--. .N. ,r-,r-.,ar--,r-,r-,r',r-,r-,r-,r---.,,`-::a:.::;,?;.,...,,-.,,.,..,,._,,._,...,,..,,..,,..,,. The Chicago Radio Show A week of high pressure Radio As related by one of S we look back on the its conspicuous participants, five days of November A 20th to the 25th spent R. H. G. Mathews in the Chicago Radio Show, we have a vivid pulsing picture of surging crowds, flashing color, pol- ished exhibits, attractive displays and energetic salesmen. From this jumble of impressions many high lights stand out. In the first place, some idea will be gained of the size of the show from the total attendance, which was in the neighborhood of 100,000. And this .crowd was more than a mere crowd of onlookers. It will be recalled that at previous shows the great general pub- lic paraded around, walked through such booths as were handy, with va- cant looks on their faces, stuffed their pockets full of literature and wandered on out, without asking questions or displaying any BIRD'S EYE VIEW particular interest. OF SOUTH HALF OF THE CHICAGO RADIO SHOW This The arrangement and preparation of the booths year's show was different ! The was attractive and well adapted of the show. All the to the purposes crowd came, poked its pencils inside exhibitors felt well rewarded of things, tore them apart and nearly booth the mobbed the salesmen in attempting to first night. The second stage, and has become a great settled night this same secure information. This fact is best exhibitor had fifteen industry, one of the greatest in the salesmen working in his booth and world. could have used more. This year's KNOWLEDGE AMAZES crowd did more than "look"; it wanted As soon as the doors opened at 2 information. It was going to p. m. the radio curious began to pour buy sets and wanted to know why it in, and at 7:30 p. m. the lines seeking should buy any particular set, and it to gain entrance were backed up for a was there to find out. great distance north and south along Wabash Ave., approaching the en- Last year's attendance at the Chi- trance. cago Radio Show was approximately The widest range of radio equipment 60 per cent. youngsters. An analysis was represented. The simplest bit of of apparatus was this year's attendance shows that on display, and at the less other extreme were beautifully con- than one per cent. of the atten- soled and cabinetted sets running in dance was composed of children. Mr. price to $1,000 and more. Charles Hall, President The of the Coli- crowd was made up of all sorts seum Company, in whose building and ages of boys and girls, men and the women. Exhibitors who were demon- show was held, states that a greater strating expressed surprise at the number of automobiles were parked on knowledge of radio which the general the streets surrounding the Coliseum public possesses. Young men and old than have men who ever been so parked at any admitted that they knew show ever held nothing of radio a year and a half ago at the Coliseum, and in were able to discuss sets and devices this connection it will be remembered with fluent intelligence. that the Coliseum is the home of the -From the Chicago American. annual Chicago Automobile Show, as well as many other great expositions. From these facts it is very evident illustrated through the story of one of that radio has come to stay; that its the larger exhibitors at the show, who appeal is now to the business man and Letters received by three Chicago broadcast- started out with four salesmen in his his wife, that it has passed the "fad" ing stations 24 25 JANUARY, 1924 THE WIRELESS AGE The exhibitor who pays good money to exhibit in a show is always inclined to be critical, and his judgment of the value of a show is therefore of considerable importance. The writer has yet to find one exhibitor at the Chicago Radio Show who is not clamoring vociferously of the tremendous value of this last Chicago Radio Show. Jobbers and dealers were there in profusion, and they were there to do business. They went through the show with a fine tooth comb, made their selec- tions and placed their orders then and there. SHIFTING OF LOUD SPEAKERS KEEPS CROWD CIRCULATING Too much credit cannot be given U. J. Herrmann and James S. Kerr, who managed the show. It was the smoothest running exposition of its size that the writer has ever seen, and in this opinion the exhibitors are again unanimous. Demonstra- tions were not allowed. The show manage- ment installed and operated a concealed re- ceiver, the output of which was supplied to banks of horns in various parts of the big hall, which is nearly 500 feet long and 200 feet wide. The music of the vari- ous Chicago broadcasting stations was brought in clearly and beautifully throughout the show. The squeals and howls of interacting receiv- ing sets were absolutely absent. For the first time the public at a radio show really had an op- portunity to hear for itself what radio music was like. Because of the fact that receiver in operation the OVER was concealed, no manu- received any QUARTER facturer MILLION RE- more credit for the PLIES TO demonstration than and the BROADCAST any other, STATIONS crowd was kept in circulation b y Great interest the switching centered in the "Lis- of the recep- teners Vote Contest" tion from which was conducted one bank during the week preced- of horns ing the show by the three to an- large Chicago Broadcasting other. Stations, KYW, WDAP and WJAZ. The listeners of these three stations were asked each night to send in communications stating just what class of entertainment they desired most to hear broadcast. As an incentive to secure sufficient an- swers, so that this would not be a minority vote, over $5,000 worth of prizes were donated by the various ex- hibitors at the show. These prizes in- cluded 27 complete receiving sets of vari- ous types as well as accessories of all kinds. The replies as they were received by the three stations were numbered, and each night at 10 o'clock at the show drawings took place, 100 nightly, the prize winners be- Not prizes being drawn by the three stations. omitting ing announced figure on the number of replies re- The WIRELESS The total ceived by these three stations is stupefying. While AGE booth, radio and radio old we all realize the tremendous power of where our to us in met and broadcasting, until it is brought home forcibly friends have no conception of new friends were made some such way as this, we really its immensity. A total of 263,410 replies were received, 26 THE WIRELESS AGE JANUARY, 1924 awarded to Joseph Dorothy, 517 West 148th Street, New York, N. Y., who exhibited a three -stage radio fre- quency detector and two -stage audio frequency receiver. The second contest was won by Ulysses Coates, 11733 Vincennes Ave., Chicago, Ill., and the third contest by John Neis, 1533 Wolfram Street, Chicago, Ill. No attention was paid to the type of circuit used in awarding these prizes. The displays offered by the various manufacturers and dealers showed great originality, and many interesting and novel features. Our old friend Grebe drew tremendous crowds with Entries in the amateur builders contest a projecting machine which ran a (film of his factory showing the processes of which 170,699 were received by trating the principles of radio commu- of construction. The Chicago Even- WJAZ, 37,800 by KYW and 55,711 nication in sugar-coated form with a ing American booth was built up in the by WDAP. Assuming not over one little comedy mixed in to make them form of a broadcasting studio, and in person in fifty will take the trouble to palatable. Here also various well fact considerable broadcasting was send in a telegram or letter in a con- known radio engineers gave talks each done from the booth through the test of this kind, apparently the three night. Among the speakers were E. Westinghouse Station KYW, with stations mentioned had a total audi- T. Flewelling of well known Flewell- ence during the week of 12,253,250. ing `'Flivver" circuit, Dr. Lee DeFor- Ponder this figure for a moment and est, Channing Pollock, well known try to realize how many people it author and playwright, William really represents, and then try and Schnell, Chief Engineer of the Elec- realize the power that such an audi- trical Research Laboratory of Chicago ence will have along the lines of politi- and others. cal and other efforts, if its power is Near the theater were exhibited the ever consolidated and brought to bear various entries in the three amateur on any one issue. building contests. The first of these Another drawing card at the show contests was unlimited, as to condi- was the hourly performance of Fran- tions, the prizes being $75.00, $50.00 cill, the radio wizard, who demon- and $25.00, respectively. The second strated the most complete radio - contest was restricted to school chil- controlled model ship that can be dren only, the prizes being five in num- imagined. His thorough control of the ber, $30.00, $25.00, $20.00, $10.00, ship was demonstrated by the fact that and $5.00. The third contest was for he could at will sound its horn, move sets of trick or novel construction, the it in various directions, right, left, three prizes being $20.00, $10.00 and front or back, light various lights all $5.00. The judges, E. T. Flewelling, over the ship, ring its bell, release toy William H. Schnell of the Electrical balloons imprisoned within it, fire its Research Laboratory and R. H. G. cannon, play a phonograph concealed Mathews of the Chicago Radio Labor- within, imitating a ship's band, or do atory, spent a great deal of time in all of these things or any of them si- carefully comparing the various ex- multaneously. hibits. The first contest was won by a Francill and his ship In the theater at the south end of 12 -tube Superheterodyne exhibited by the exhibit hall were displayed con- Harry P. Kanuf, 718 Grace Street, which the American has a broadcast- tinually various "Radio Movies," illus- Chicago, Ill. The second prize was ing agreement. Other Chicago news- papers were also represented by booths and exhibits. In the Commonwealth Edison booth was found a beautifully built white and gold Sleeper Monotrol Set, and near it was found the Tuska-Miner Superdyne Set which is attracting so much attention. The honors for beautiful and ex- pensive construction unquestionably go to Federal, who sent to the show under heavy guard a Sterling silver receiv- ing set, the cabinet being beautifully hand chased and engraved, with solid silver knobs and controls throughout. This set occupied a glass case in the center of the exhibit hall and attracted much attention. One of the demonstrations demonstrating (Continued on page 82) WHOOPS of Wild Rodeo Warriors Radioed From WJZ As told by STUART HYDE HAWKINS FOR the first time in a century or more the peaceful urbanity of thousands of homes throughout the eastern part of the country was rudely shattered by the gutteral gib- berish and woeful wails of frenzied American Indians, for station WJZ broadcast the radio debut of the tribe of Flathead Indians who had arrived in New York for the Madison Square Rodeo, on Tuesday afternoon, No- vember 13. Under the guidance of Grey Scott, who escorted the tribe all the way East, the warriors arrived at the broadcasting station, and for once the soulful solemnity of the richly fur- nished studio seemed totally unsuited as the background of a radio concert- if concert it may be called-for the feather -filled head-dress and wam- pum -wound moccasins of the Chief of the Flathead Tribe and his chosen braves needed a far less civilized set- ting than is customary in Manhattan studios. From the moment of arrival Scott's entire energies were directed towards keeping the descendants of the original Americans from either bolting out- right or destroying whatever apparatus they could see, for the radio was to them a terrifying manifestation of the awful power of the Great Spirit. Chief Crawler (right) heaves a sigh of relief at having safely talked into the little box -on -stick, After considerable coaxing and coach- while Sam Vincent shows his bravery by touching the stand; Sam Nose looks longingly at the corner from which he has been dragged ing, Chief Michele Crawler, summon- ing by a visible effort his total reserve plan and Grey of chiefly courage, approached the make -shout -you -hear -he - don't." B y the broadcasting - hurled a short series which we surmised that the Chief was Scott, he was shepherded to the side microphone and at the of unintelligible grunts and growls not as enthusiastic about broadcasting of his two brothers -in -misery into the ether, and Sam Vincent, who as we might have hoped. "Chief he microphone. From the announcer's has mastered the lesser intricacies of say-he say-" -here Scott gave him station came the words "the Flatheads war - American as it is spoken, was forcibly a forceful swift and silent reminder will now sing one of their Nose commenced held by the redoubtable Scott while he that he was addressing a half -million songs-," and Sam an immense murmured a weak-"Chief he say he people and should realize the dignity a furtive pounding upon seemed like glad be New York; like big totem - of his position and cease stammering tom-tom. After what the vocal si- pole" (which Scott later assured us -"Chief he say damn lot more, he like hours, the Chief broke lence with a long -drawn, quavering meant "skyscraper") ; very pleased be New York, G'bye." corner of the wail which had more of the funereal here ; don't like little box-on -stick -that - From the farthest studio emerged the corpulent form of than of the martial nature; a moment Sam Nose, who had taken no chances later Sam Vincent joined in-sound- while his comrades were addressing ing for all the world like an uncertain the "box -on -the -stick," and had re- "wandering saxophone" in a jazz or- tired to the most distant spot possible ; chestra-and gradually the volume and by the combined efforts of Eddie swelled, the spirit changed, until under Paul, the Publicity Manager of the the stimulus of the tribal war -song Rodeo-who was very evidently being their fear of the "box -on -the -stick" cursed in every variation of the Flat- became a deep and abiding hatred for head language for having conceived (Continued on page 82) 27 Radio de Luxe Messmore Kendall, Owner of the Capitol Theater, Prizes His Radio Sets and Places Them in Beautiful Surroundings Interview by William A. Hurd To begin with, his apartment, which comprises the entire upper floor Messmore Kendall is a New York of the lawyer who conceived a beautiful idea. Capitol Theater building, and is only Recognizing the important place which accessible by means of complete iden- the moving picture had come to take tification, is distinguished by the most in all of our lives, he yearned to give sumptuous furnishings. Rare the movies a setting worthy of the period splendid productions which mark a con- pieces, antiques and Oriental rugs dec- tinual progress in this art-a setting orate its high-ceiled rooms and estab- that would enhance their value. From lish an example of what can be done this conception came the Capitol Thea- in the successful combination ter, a grand home of the film -play, of lux- where thousands of people every day ury and comfort. enjoy the unspoken drama in perfect The radio cabinet, massive as it is, comfort, surrounded by decorations of does not seem out of proportion extraordinary beauty, and thrilled by a with great orchestra of unusual quality. the other large pieces, all hand carved As our interviewer has intimated, Mr. and individual. In fact, a grand piano, Kendall has some interesting hobbies seeming at rest in one corner, is nearly which mark him as a man of broad and obscure. useful activities. His homes contain his considerable collections of rare Mr. Kendall had hesitated for a paintings and antiques, which latter in- moment, seeming to weigh the impor- clude a number of valuable Duncan MR. MESSMORE KENDALL tance of details, but decided, he Phyfe pieces. He is an ardent biblio- phile warmed completely to the subject. and one of the illustrations with ATWENTY -thousand -dollar ra- this article shows part of his library of he 6,000 dio set ! And in a moment I "Upstairs," began, "I have the volumes, most of them first edi- was actually going to behold set mounted in a fine old cabinet. In tions. the evening I can tune -in THE WIRELESS AGE identifies such a treasure! on WEAF Mr. Kendall with the undeveloped fu- After I waited, however, for well and hear the Capitol Orchestra play- ture of radio as an agency of culture over two hours in the second room of ing. At the same time I can hear the and entertainment. It is to men such the richly music in a dictaphone which is con- as he in his Capitol Theater project has appointed suite which serves shown himself as nected to the orchestra pit by direct to be that we must look an office for Messmore Kendall, for many of the great ideas yet to be proprietor of the Capitol Theater, wire. Then, if I wish, I can open a born that shall popularize radio and while his secretary guarded the pri- window situated just above the theater multiply its benefits. Radio needs the vate through which the music comes interest, enthusiasm and vision of big sactum in a capable, pleasant man- direct men and women. ner, she arose quickly, motioning for from the instruments." me to follow. Walking through the third, and larger room, down a hall- way and through another, still larger room, .I was abruptly ushered into Mr. Kendall's private office. A hasty glance revealed a spacious, well lighted room, luxuriously fur- nished, but in good taste. Seated comfortably in an overstuffed chair I studied Mr. Kendall's features wliile he finished signing some papers. A strong, kindly face suggesting a keen sense of humor hardly betrayed the man of finance and power I had expected to meet. This was a man of vast capacity for the finer grasp of art and tradition. I rather sensed that direct reference to the dollar value of his possessions would hardly gain his confidence. "You have a very fine radio and I would like to know more about it," was my opening suggestion. "Yes," he replied, becoming inter- ested, "I have a set in my home at the top of this building, one at my A ezu,uuu tcr,uiv LArnN,l Dobbs residence A corner of Ferry and another on the living room in Mr. Kendall's home located at the top of the Capitol Theater my farm." building. The massive cabinet in the foreground to the right contains the wireless set on which he listens -in to the orchestral music that is transmitted by direct wire to WEAR, New York, and Here was a real fan ! I asked him. from there, broadcast to millions. The cabinet is a rare, hand -carved antique. ground, fireplace In the back- between the and the clock, the paneling is actually a door opening on a private to tell me about them. stairway leading to the theater 28 DE LUXE 29 JANUARY, 1924 RADIO when consummated by the influence of home surroundings. He has certainly placed the two together in perfect har- mony. And probably because he rec- ognizes in radio a permanent contribu- tion to culture rather than a laboratory novelty. Broadcasting Congress (Continued from page 23) A device has been installed in the House of Representatives chamber for broadcasting the President's message. Anyone who has ever attended a session of the House knows that the chamber is so large and the con- fusion so great that it is hard for those in the galleries to keep track of what is going on, and the Speaker is constantly rapping for order so that the members themselves can hear. To help out this situation the Western Electric Co. a year or two ago volun- teered to install an amplifying device similar to that used at big public gatherings. A cluster of horns was MR. KENDALL'S LIBRARY IN THE DOBBS FERRY HOME and they IN THE PRIVACY OF a closet located at one end of suspended from the ceiling, The radio set, shown at the lower right hand corner, is kept in by opening the door. The circular walnut table. with microphones on the the room from where it may be enjoyed during his stay there were connected today occupying its original position, was used by Washington Speaker's desk, the desk of the read- stands from which The Capitol, one of the largest Originally a farmhouse of the pic- ing clerk, and the type, its char- make their longer speeches. theaters in the world, has a seating turesque Dutch Colonial members The magnificent acter has been faithfully preserved in These microphones can easily be con- capacity of 5,000. wires running mark it as a veritable pal- the restoration. It illustrates two dis- nected with telephone decorations architecture stations in Washington or ace for photo -plays. No introduction tinct phases of Colonial to sending rare collection of early from which the words of is needed here to the Capitol Orches- and contains a New York, impresario American furniture and antiques. Congress can be sent flying out over all tra, nor Rothafel, the radio course as both are Mr. Kendall, though a true fan, is the Eastern states. It is of of the Capitol Theater, link up countless thousands less concerned with the technique of mechanically possible also to well known to country by country. radio than the entertainment it offers sending stations all over the throughout the Bell Telephone "The sensation of hearing the same using the wires of the Mr. Kendall Co., but that would require special music simultaneously," that company continued, "through three different arrangements between and the broadcasting stations as the mediums is certainly worth while." only wonder that he should be company itself has stations as yet And small New York. enthusiastic over this, the child of in Washington and so 6 the radio fans of the his imagination. On December farm. Eastern states were able to listen to I asked Mr. Kendall about the of he answered, "1 the important pronouncements "On the farm," may make cabinet set that is easy President Coolidge, which have a Radiola to hear to operate. but I have history. But if they want for the folks of these and time to get away from New what Congress thinks so little as well as some I have to confine myself for the other weighty matters, York weighty, they will most part to listening -in upstairs or at which are not so have to come on to Washington and Dobbs Ferry. as hereto- "At my home in Dobbs Ferry," he take a place in the galleries continued, "I keep the set, which is a fore. Grebe. in a closet located at one end of Honoring a Forerunner of my library. There I can enjoy radio Radio in the home to the utmost." almost a century, the reluctant in an- Mr. Kendall was BRIDGINGtinkle of a tiny bell, the first in swering questions concerning the his- rang in response in which the world that ever tory of this old Tory house -magnet, was heard from the York- to an electro George Washington planned coast and across the Atlantic that brought to an end coast to town campaign Ocean when programs in memory of the American Revolution. Prof. Joseph Henry were broadcast It was to this house, also, in 1783 the General ar- December 17 from WGY, that Washington again came to THE STAIRWAY IN TEE DOBBS station at Schenectady, of New York, FERRY HOME Electric radio range for the evacuation have been the Rensselaer and Gov- The original hand rail and spindles N. Y., and WHAZ, and from which Washington used in the restoration of this stairway. It radio station at Troy, N.Y. with their escort of leads to the upper hall, which has become a Polytechnic ernor Clinton. part of Mr. Kendall's library where his radio In 1831 Professor Henry discovered troops under General Knox, took up set and the choicest of his sir. thousand vol- umes, most of them first editions, are kept. an electro -magnet by which he was the old Post Road to left, is the march down The Dutch chime hall clock, on the able to transmit signals to a distance. re-enter the City of New York. dated 1686 The Woman Listens In What She Hears and What She Likes To Hear By Hortense Lee PERHAPS you think an $gyptian of the desert, when all the woman tents were ley spoke on "Christmas in the Philip- is a veiled, suppressed, se- blown away but hers. Of how her cluded creature, pines." Soon there will be more talks, still a century or tent was held fast to the sand by a from two behind your modern suffragette. other stations, too, in different man lying at each peg, tamping, tamp- parts of the But if you listened in to WJZ, one country, as the radio com- eve- ing, tamping, all the night through. mittee enlarges its range. ning in December, you heard of the The talk was a treat. But it had The idea of this radio committee, as famous "Ladies Wafd" of Egypt; of another interest quite outside charming itself. an effective way to spread the impulse Egyptian ladies using the For it all grew out of an idea. It methods of was to creative inspiration among young western politics and suf- the idea of Miss Anita Browne, Chair- writers fragism; of street parades; and artists presupposes, of of street man of the Radio Committee of the course, a large harangues from a motor audience of women lis- car; of boy- League of American Penwomen. The teners everywhere. cotts. These are things the ordinary League has a big, definite purpose, traveler misses When you cannot see beyond the in the Egypt of hotels which it carries out in a big, efficient microphone-when and tourists' places. But they you cannot sense are part way. Part of that way, now, is by your audience-how can of the life Mrs. Grace Thompson radio. you know that women are listening -in Seton sees in her thrilling trips the coun- The League of American Pen - try over ? straight into the heart of the country. women, in case you do not know it, is The question was put to WJZ. Mrs. Seton told, And in her radio lec- a league of successful professional the answer was in the letter files. ture, of the political and social activi- women. It has branches in There were ties twenty hundreds of letters from of the woman of Egypt. Told of cities all over the United States. An women-perhaps thousands, her own adventures if you in a fierce simoon important part of its purpose is to ex- counted them. Some of them are re- tend to young students the encourage- sponses to talks specially planned for ment and help that will develop their women-intelligent inquiries on the abilities and show them the way to subjects discussed. Some of them are professional advancement. bits of enthusiasm or criticism. Members who have gained fame as The letters give real glimpses of writers, lecturers, artists, musicians, home fun everywhere, and gradually give talks and conduct study groups shape, by the force of public opinion, for student members. There are the trend of broadcasting. Remember, poetry groups and short story groups, there is no box office to indicate what drama, scenario writing, music and the public wants-only the letters you art. All under well known women send. And the woman's vote is as who generously give their time. weighty as the man's. Now, through radio, the delightful What does the woman like, when entertainment of some of these groups, she listens in? So far, you can only and the message of practical help and throw up Your hands in despair at the scholarships offered, will reach thou- puzzle. Read some of the letters that sands who never before heard of the come to a single station-and you say, League of American Penwomen. "Everything !" One woman likes jazz music. An- For the League's first radio evening other Mrs. Grace Thompson wants less jazz and more classi- Seton stepped cal music. One out of a most thinks prize fights impressive page of are "just too "Who's Who" to give brutal for words." An- her talk from other writes to suggest WJZ. Mrs. Seton is vice-president that Major of White be surrounded by the National League and finds time a sort of tele- in phone booth from which to talk, a busy life to serve generously in its so activities. that the cheers of the crowd can't drown a word of the broadcasting of That was the first talk. Then later the big fights. in December, Mrs. Alice McKay Kel- A list of the things that "I especially 30 31 JANUARY, 1924 THE WOMAN LISTENS IN often before the maga- liked," copied from letters of women years. She was an ardent Epis- tell that news the stand. What a scoop ! everywhere, includes the Hotel Com- copal Church member in the past zines are on and sincerely hopes many other Take the three-piece suit, for ex- modore Orchestra, an organ recital, length Band, a negro shut-ins have had the same good ample, with the three-quarter the Coast Artillery news of its coming fash- quintette, a sermon, a prize fight, bed- fortune to have listened -in this coat. First day." ion importance was the sketch here time stories, dinner speeches, stories Bazaar." solos, in- And here's another letter : reproduced from "Harper's of travels in Africa, violin to leak talks. Almost every- "I drove 34 miles on Sunday But the news was permitted terior decoration radio. thing on the broadcasting program. to get a set working so the lady of out, first, by could hear the after- It is difficult to know who is listen- One woman writes : the house ing -in, for there is no occasion for wants to noon sermon. After we got the "My mother-in-law could letter -writing, when the questions are kindly try and play set working, I wish you know if you'll on her answered in the talk. But sometimes `Beautiful Isle. of Somewhere' on have seen the expression is paralyzed a designer will stop in to ask Miss Har - your wonderful organ." face. This party and can't leave the house." ford to tell more than her brief lec- And another a busy dress- of the ture can reveal. Or "Please have just lots of dance Women are critical-critical receiving set was not the music, whether it is maker, whose music and please have the Blue quality of clearly, comes to the mag- quality of jazz, or quality of classical functioning Ribbon Syncopators again. azine office to ask the names of the "Dorothy." music. They are critical, too, of the broadcast that is always an Paris -sponsored fabrics But the most universal picture is a talks and lectures. There welcomes these type of program, week. Miss Harford home picture, with all the family lis- audience for every welcomes all letters- the popular interest ap- questions-and tening-in-everybody applauding. Let- but gradually quickly show what sort of in the type of criticism, for they ters are signed "Mr. and Mrs. So -and - pears, shown are most useful. And that is the number of letters of apprecia- talks So." Or "The So -and -So Family." and what she wants to know. listen -in to the tion received. pro- All together, they radio talk The future of broadcasting Mother acquires an eager in- A good example of the by the au- games. for women-a series grams will be determined terest in the sports her boys are fol- especially planned a large part of it by the with, presumably, a large audience- dience-and lowing and soon becomes a baseball feminine audience. "Give the woman is the group of talks by Miss Har - or a football fan. Sometimes she notes what she wants," is the slogan. It's off "Harper's Bazaar." No man down the market reports and weather ford, hard enough task at best, as any man can quite appreciate the interest in the a reports, for her farmer husband, to will tell you. How much harder, if his day's work, or the mar- first news from the front-the front guide in Bazaar" prints you don't write, write, write! keting of his products. being Paris. "Harper's letter that gives a glimpse the fashion news "almost as soon as Here is a radio Lucky Mayors! the way radio quickly takes its place Paris knows it." And the talks of it is such a job to in the family circle. It came in re- is too bad that IT a city, otherwise sponse to the broadcasting of a Boy incorporate probably about 99.44% of the Ameri- Scouts' program : people would endeavor- to become "You know I am a great friend can The reason is that the may- , Scouts. I have a boy, he mayors. of the ors of San Francisco on the Pacific belongs to the Scouts, and I never Coast and New York City on the At- let him, miss a meeting. It took lantic Coast, have each been given a ra- two years for me to decide to dio set. During their visit to San Fran- a radio set, but I certainly have cisco, last spring, Major General ; our eve- am not sorry it passes Harbord and David Sarnoff, the only trouble is James G. nings away, president and vice president of the stay up too late. My husband we Radio Corporation of America, dis- always says just this one, but it's Rolph of San late, but covered that Mayor never the last one until had to use headphones never mind, it's all right." Francisco when he listened in, using a set in his conies in Many and many a letter office. The Mayor now uses a Radiola to tell of the helpfulness of lecture Grand presented to the city by General and sermon to women everywhere. Harbord. In New York City, Mayor One woman who never heard a lecture Hylan also has been given a similar in her life found her comparative deaf- receiver. ness overcome by the close -fitting headphones, and no longer misses the From the Skies big news and the interesting speakers. the sermons RIDOUX, an amateur of The letters of listeners to re- to quote. Here is one MR.Garches, France, had the luck are too many weighing written to WGY that tells a story that cently to find a meteorite a number of pounds. In breaking it is universal: sparkling par- for he noticed a number of "Please accept our thanks the appearance of listening to the ticles, resembling the privilege of A small piece of the visitor this morning. Es- galena. church service the heavens was forthwith in- pecially thankful is one member from serted in the crystal holder, the cat of our family-Mother Forrester, signals heard. ten years, whisker adjusted-and 73 and blind for the past proved to be only slightly from afflictions and unable The material weak e4 inferior to regular galena, but seemed to go out of the house to a ser- from Fresh Paris fashions are radioed to contain fewer sensitive points. vice on Sunday for the past five "Harper's Bazaar" The Navy's Radio Net 135 Land Stations More than 400 Ship Stations $25,000,000 of Installation and Equipment 100,000,000 Words Transmitted Annually "All's Well: Radio is at the Helm" By J. Farrell PLEASE send destroyers, Yoko- cial interests abroad, ra- hama. Americans in great dis- < < dio has played a large tress-Bell." It was one of the part in directing the early messages of the Japanese dis- movements of naval aster, sent by Commander Bell in vessels that patrol for- charge of the Naval Hospital at Yoko- eign waters. In the hama from a Japanese warship, and West Indies, for ex- received at San Francisco via Shang- ample, the navy has fre- hai, the Philippines, Guam and Hono- quently landed men to lulu. The Asiatic fleet was at once protect the hemp, oil dispatched to the scene to render aid and fruit trade; in Cuba to the sufferers. When Smyrna was similar protection is af- burning, it was an American naval ves- forded American sugar sel that told the world by radio of the plantations; in the disaster. Help was summoned from Near East the tobacco all over the seas, and the American and petroleum trade on Navy saved thousands of Christian occasion have needed lives. protection from local Visualize 135 radio stations dotting uprisings. The power- the Atlantic, radio antennae of the U. S. S. Colorado, the world's Gulf and Pacific Coasts, ful radio station at Pe- greatest battleship and the island possessions of the king enables the Ad- United States. Add to the system miral of the Asiatic Fleet to keep from shore and ship radio. more than 400 floating by Storm stations on as in close touch with the American Le- warnings are regularly flashed many naval vessels on the high from seas. gation, and to render prompt aid in the high powered shore stations cover- The result is a picture of Uncle Sam's protecting life and property from ing vital a range up to 6,000 miles. The nerve force without which in time bandit hordes. Similar assistance is radio of compass stations, of which there war the American Navy would be rendered at Constantinople. are more than an unwieldly mass, 50 located at strategic and in time of peace Every navy station is required by points along the American coasts, ineffectual in protecting America's have for- official order to listen for a period of been the means of preventing heavy eign commerce, in preventing mari- three minutes every fifteen minutes loss ships time disaster, of and life in time of fogs, and in bringing succor to for signals of distress on the high seas. and other maritime emergencies. the distressed in shipwreck, earth- When such a signal is heard the call, The navy radio quake, plague and famine. system is generally The navy's together with the position of the ves- conceded to be the most comprehen- radio net covers practically the entire sel, is broadcast on high power. Every sive world. anywhere in the world. Along naval unit in the vicinity of the dis- the coastal boundaries In protecting America's of the United commer- aster is rushed to the scene, directed States and island possessions there are 40 high power stations that work dis- tances from 800 to 6,000 miles. These stations are supplemented by 95 in- termediate stations with ranges up to 800 miles. Combined with the 400 or more ship stations and airplane radio equipment, the complete land, sea and air radio system represents an invest- ment of approximately( $25,000,000. The interplay of messages between sta- 12dn. tions aggregates 100,000,000 words ip I á annually. Most of the business is of ..,I1Mr, a government or public nature, but 68 ::, . . :/' stations are also permitted to be used for commercial business by ships at sea. These stations handle an annual volume of 5,000,000 words. The complete system is primarily organized as part of the nation's naval defense. The radio equipment of the new U. S. Navy airplane carriers includes the novel feature of "But in time of peace," de- two collapsible radio masts clares Rear Admiral H. J. Ziegemeier, .32 33 JANUAI:1'. 1924 THE NAVY RADIO NET Manila. The navy handles all radio communications with the Philippines. Privately owned stations are not per- mitted to operate on the Islands. On the eastern coast of the United States the main navy stations are at Bar Harbor, Maine ; Sayville, L. I. ; Annapolis, Md. ; Arlington, Va. ; Cayey, P. R. ; Guantanamo, C. Z. and -Panama. Bar Harbor is a receiving station for messages from Europe, the fleet in the West Indies and from the Pacific. Sayville is used as a transmitting station to the fleet and as a standby for Annapolis, both stations being operated by remote control from Washington. During the troubles in the Near East, communication with the Admiral at Constantinople was had through Annapolis to Paris, leased land line to Coblenz, Germany, thence to Vienna, from Vienna by radio to a naval vessel Scout Cruiser "Detroit" hitting out for sea with all antennas spread in the Mediterranean, thence relayed by radio to Constantinople where the has many ramifications. southern circuit was used for one navy has a receiving station at the "the service a ship a liberal use of the sys- way traffic, Honolulu to Iwaki, and is American Embassy and also By extending messages were to the press and business where still used for westbound messages. station. The return tem handled, being received at it does not interfere with commercial The Samoan circuit is made available similarly neoples all over the world for traffic to the Society and Fiji Bar Harbor, and then telegraphed by companies, at are brought into closer contact and Islands, as well as to New Zealand and land line to the Navy Department human understanding. Another im- Australia. Washington. In later experiments. portant activity is to assist mariners by In the Pacific the navy is permitted messages have been copied direct from flashing out time signals, weather re- by law to handle press reports to prac- Annapolis by the ship station at Con- ports, storm warnings, hydrographie tically any point, provided that one stantinople. reports, and in transmitting S O S and end of the deal is connected with The radio compass developed by the signals of distress." American newspaper interests. This navy is regarded as the navy's out- During the winter months the authority expires June, 1925. Under standing contribution to the safety of Alaska cable is frequently broken. In it news services in the Pacific are han- navigation. A compass station is lo- im- these emergencies naval radio provides dled by the navy, the Associated Press cated within 100 miles of every the only means of rapid communica- sending an average of 1,000 words portant seaport in the United States. 50 tion between Alaska and Continental daily from San Francisco to Honolulu Storms frequently drive mariners United States. To handle the mes- and about 800 words to Manila. The to 100 miles off their course, and in sages, stations are located at Sitka, navy press rate to Honolulu is three the ensuing cloudy or overcast weather Ketchikan, Seward, Kodiak, Cordova, cents a word and six cents a word to (Continued on page 68) Dutch Harbor and St. Paul in Bering Sea. Similarly, only one cable con- nects the United States with the Far East and is frequently out of com- mission months at a time due to coral formations on the bottom of the sea between Guam and Manila. To make up this lack the navy has several radio circuits across the Pacific, the giant of which is from San Francisco to the Philippines. Navy stations are located at Hono- lulu, Guam and Cavite, and Tutuila in the Samoan Islands. The Cavite sta- tion is in sonstant communication with French Indo-China and the Dutch East Indies. Northward from Cavite are the circuits to Peking and Shang - hair. Eastbound traffic is sent direct from Cavite to San Francisco. Dur- ing the Limitation of Armament Con- ference two special circuits for govern- ment and press dispatches were set up between the United States and Japan. The northern circuit was between the NAVAL RADIO SCHOOL AT GREAT LAKES Japanese radio station at Sapporo and Here the raw "gobs" are made into radio technicians who hold the key to the Navy's the navy station at St. Paul. The nerve system When Marine Radio Deports Were Tabooed By Old Timer TRETCHING northward to narrate was through a series of ra- the observer in question began to iden- towards New York City dio telephone tests then being con-, tify and report his from ships as soon as a the New Jersey ducted between Fort Hancock, Sandy bit of smoke appeared on the horizon, coast which is dotted with Hook and Fort Wood, Bedloes Island, while his rivals, in merry the other tower, had and populous sea- in the very shadow of the Statue of to wait several minutes longer until the shore resorts, there is a funnel and bleak, barren, superstructure of the ship sandy, narrow and gen- came into plain view of the powerful erally unattractive neck of land known telescopes. as Sandy Obviously, our observer Hook. At first glance one scored one "scoop" would say that after another until this bit of land, several the rival telegraph company must have miles in length and but a fraction of a been on mile the verge of panic; for how wide, is of no use whatsoever. could the -vision Yet, jutting super of the rival ob- out into the ocean and em- servers be accounted for? bracing in its wide sweep a sheltered Then one day the unexpected hap- body of water which forms part of pened. After scoring one "scoop" Lower New York Bay, Sandy Hook Liberty and the very after another until it became an estab- could not have been better designed for station from lished two purposes. which the WVP radiophone programs fact and no longer created won- It is ideal as an obser- der, our vation have been broadcasted. The small observer friend reported a post for keeping tabs on incom- ship by means ing and Army boats plying between New York of its smoke in the usual outgoing shipping clearing the way. He had told Port of New York. pity and Fort Hancock are few and the rival observers far between, and since radio that he had developed a new method of Back in 1909, when radio communi- the tele- identification phone experiments at that time never by means of the smoke cation had not been developed to its of the various present lasted longer than a few hours at a ships, much to their in- high state of efficiency, there credulity yet leaving them very mysti- stood on the very tip of Sandy Hook time-it was an ordeal at that period, rather than a pleasure-the fied as to the peculiar powers of our a pair of tall towers. From some dis- writer observer. tance away, they seemed twins in archi- found himself with plenty of time on his hands and not much to do. tecture as well as in purpose ; but when Hence viewed at close range they were in the course of his walks about the quite narrow different. One tower was built of steel, strip of land, in which every while feature of the military post had become the other was built of wood ; however, both towers were surmounted quite commonplace and without fur- by small balconies and a complete circle ther interest except for the big guns. of windows for facilitating observation and these had to be viewed from a dis- out to sea. A keen observer could not tance because of the snappy sentries. fail to notice one or more long barrels the author quite naturally discovered the two protruding from the windows and bal- towers and spent much of his conies, which, in view of the military time in one of them. And that is how surroundings, might well be mistaken he obtained the data for this little story. for machine guns or young cannons. Now it appears that the keen rivalry But as a matter of fact they were mere- between the two observation towers led ly telescopes of high power. to more and more guesswork as regards the reporting of shipping, Now these towers were maintained as might well A bit of smoke he expected. At first marred the horizon, by two rival telegraph companies for the observers whereupon our observer friend waited until a ship was well above tele- the purpose of reporting the ships the graphed the report in the usual man- passing Sandy Hook. The rivalry was horizon, so that she could be viewed in her ner. He had heard the ship reporting of the keenest sort, for the telegraph entirety without chance for mis- to taken identity. Fire Island an hour or more ago, companies secured patronage for their But with the ever-in- and it was just a matter marine creasing urge for "scoops" the observ- of routine. news service largely on the basis But when the ship came closer, our of their "scoops." In each tower there ers began to identify ships by means of their observer discovered, to his horror, that were several men on duty, ever on the superstructure and funnels, the he had made mistake. latter being generally a The ship, in- lookout for signs of smoke on the hori- of a characteris- stead of being the ocean tic color or design. liner which zon and ever ready with their powerful he had reported, was a coastwise steam- telescopes to identify the incoming Then one of the observers hit upon er which was swinging in from a ships by their funnels and superstruc- the novel and bold scheme of utilizing course far out to sea. He had to tele- ture. The instant a ship was identi- radio. He installed a radio receiving graph a correction-a fatal thing in fied, a report would be flashed by tele- set in his tower and was able to hear this line of reporting. The officials of graph to the marine news bureau in the ships reporting to Fire Island, some his company, now aroused to the fact New York City. For that purpose a forty miles distant. Once the ships that some peculiar and quite fallible battery of keys and sounders sur- reported to Fire Island, it was a simple method must be at work in identifying rounded the observers in each tower. enough matter. to compute the time re- ships by means of their smoke, investi- The way the writer happened to quired for the ship to come to the hori- gated and discovered the radio receiv- come across the story which he is about zon of Sandy Hook. So in a short time ing set. 34 35 JANUARY, 1924 AUTOMATIC RADIO SIGNALS E HAVE A SPECIAL Record! ANNOUNCEMENT. 4,500,000 Miles, Some "A young man has been Return granted the privilege of Radio Signals Make Automatic broadcasting for ten min- utes on a subject distinct- of the Radio Corpor- matic sequence set in operation by the to ENGINEERS ex- ly personal It is not our custom ation of America achieved a sci- initial impulse became completely give permission for such a talk re- entific feat recently, when by an ar- hausted and the dot withdrew from the quested by a private individual, whose rangement of the controlling circuit of race. And all this happened in twenty- identity we cannot reveal. There are circumstances in this case, and the longest commercial radio service in five seconds. special radio we hope you will bear with us, and the world-New York to Warsaw, In other words, the original listen to what Mr. I. W. A. J. as he Poland-they were enabled to make impluse unaided by man caused a sig- prefers to be known, has to say. Mr. automatic signaling a substitute for nal to travel back and forth around the I. W. A. J." of wire telegraph lines Eric H. Palmer contributes to the operators. Radio was made to control loop made up unusual dramatic of 186,000 February issue an radio, and thus over an 8,500-mile cir- and radio circuits at the rate story of what I. W. A. J. broadcasted. cuit continuous signaling was pro- miles per second, and since it continued The reader will stay with it to the end duced without human assistance. this process for twenty-five seconds, it to find out what three leading men of dis- Gotham did about I. W. A. J. The were conducted be- actually covered the astounding experiments miles. J. G. Harbord, President tance of about 4,500,000 women readers and lots of other fore General signifi- Our of the corporation, at 66 Broad Street. Explaining the commercial folk will welcome some information on manager, cance of this scientific achievement, how to house their radio sets in ap- W. A. Winterbottom, traffic and artistic manner. Mr. General Harbord said : propriate was in direct charge, while at the War- William A. Hurd writes in the Febru- special squad of engi- "We have thus achieved a double number an illustrated article about saw terminal a radio over ary neers of the company was present. check in communicating by the various styles of radio furniture. circuit. Today's experi- noon, when the experiment was our Warsaw At ment makes it possible for us to know THE WIRELESS AGE REFLEX begun, telegraph signals looped the in an instant the condition of our cir- Mr. John R. Meagher gives the read- the circuit of the two ra- February number an easy - loop around The accomplishment means that ers of our stations with the speed of light. cuits. to -make tuned R. F. reflex receiver dio can be checked as to proof to the by operators, relays of ra- messages that will be a worthy addition Unassisted receipt and accuracy almost series of Wireless Age sets which in - waves continued for twenty-five of their dio instantaneously with their sending. In dude the "Push Button" receiver of and covered a total distance of and the "Uni -Control" of seconds fact, we are able to know as much this number 4,500,000 miles (twenty times the dis- December. It costs about $10.00 to the condition of the Warsaw cir- which will op- to the moon) under automatic about make this one -tube set tance cuit as the engineer there." erate a loud speaker at a range of 20 control that was initiated by the origi- miles and has been proved for DX up nal impulse. to 1,500 miles. One can visualize this performance That Radio Jag in motion Every radio fan wants to know about as a gigantic radio lasso, set English clergymen think that vacuum tubes-the different makes and by a short impulse which entered the SOMEradio is enough to drive a man to their characteristics, what uses the dif- transmitting control apparatus and least, that's the natural con- ferent tubes are best adapted to and drink. At The edi- shot forward the first wave, successive clusion to draw from the fact that in how to use them properly. released to tor of THE WIRELESS AGE pre- waves automatically being Nottingham the ministers have pro- sents this information in a clearly un- loop repeatedly about the Warsaw sta- tested to the authorities against the in- derstood article entitled "ALADDIN'S tion and Broad Street. stallation of radio receiving sets in the MAGIC LAMP" in the February num- Again and again this original dot "public houses," or saloons. The sa- ber. raced around the circuit without inter- loon keepers are hurt and indignant, FOR THE BEGINNER IN RADIO ference from man. After making saying that they are trying to elevate In February THE WIRELESS forty laps around the course, passing the tone of their establishments by AGE commences Radio Engineering, through twenty-five vacuum tubes, ten means of the radio programs, but the an experimental home laboratory insist that it is but an insidi- course in which the elements of radio relays, changing its wavelength eighty ministers will be presented in scientific but read- times-first a feeble line current, then ous and evil scheme to get the work- ily comprehended talks. a mighty electrical wave-the auto - ingmen to drink more and more. RECEI G ANTENNA TR NSMITTING STATION I WARSAW A D AUTO ATIC CO TROLLING A',PARATUS ed RELA ANSMITTING ANTENNA NSMIT I NEW YOtK - -0 TIME áD SECOND ANTELA MILES N i% 420- - RANSMITTING AND RECEIVING ANTENNA STATION ATLANTIC OCEAN EUROPE AUTOMATIC AMERICA UT RATI Ñ6 RECE ING STATION ANO APPARATUS AUT" ATIC RECORDER j r inj-LrLfJWLA jui_n_fljui...ii_n_ft4 r5 ..IIjl P. 111 Pee s into 4' Broadcast.Stations : ;; ii'r 1 !Il ... "'.i.,i,.!, Aunpm1pN11_.=-_ KYW Again Broadcasting such brilliant voices of internationally out-of-the-way and remote sections in- Grand Opera Productions famous stars such as Galli-Curci, Rosa to close touch with culture, education Raisa and Mary Garden were heard and music, so that soon there will RADIO fans who are music lovers be over a goodly portion of the world, little to differentiate the city dweller will welcome the broadcasting by was a great accomplishment. The from those who live in the rural dis- KYW, Chicago, 'of grand opera pro- grand opera season last year was tricts. ductions which began November 10th, broadcast twice weekly during the ten The grand opera productions were when "Lucia Di Lammermoor" was weeks' engagement of the Chicago broadcast sung. by means of a special sealed Civic Opera Association and the con- telephone wire connecting The principals who the stage of sang Donizetti's certs were enjoyed by audiences which the auditorium with station KYW, beautiful score are : Giacomo Rimini, numbered more than a million. which is located on top of the Edison baritone; Florence Macbeth, soprano The delight with which radio fans Building, and twenty stories above the Giulio Crimi, tenor, with Jose Mo- hailed this innovation was proved by a busy Loop district. jica, Virgilio Lazzari, Elizabeth Kerr. deluge of letters which came from and Lodovico Oliviero, singing in the every part of the country. These let- Reconstruction of CFCN lesser rôles. ters, many of which came from dis- The broadcasting of grand opera tant points, reconstruction of indicate that this develop- COMPLETECFCN, the radio from KYW, Chicago, last year, when ment has served to bring residents broadcasting of station of the W. W. Grant Radio, Ltd., at Calgary, Alberta, Canada, has now been completed and CFCN is now listed as one of the most powerful sta- tions on the American continent and the most powerful in Canada, having a modulating output power of 1,600 watts. It is now an eight and one- half kilowatt station. "The Voice of the Prairies" was silent for two weeks while new equip- ment was being put in place, but when it resumed activities the added power and clarity of its signals startled radio fans throughout the United States and Canada, according to telegrams and postal communications of congratula- tion which commenced to pour in two days after the reopening. President Grant has stated that on the rejuve- nated set he hopes to shatter some of the long-distance records he has estab- lished in the two years which CFCN has been in operation. - Twelve especially manufactured tubes of 500 watts each, made in Mon- treal, are now being used, while a new amplification unit designed and con- structed by Mr. Grant is also being utilized to advantage. The building from which emanates the "Voice of the Prairies" also has been made more capacious, so that now there is an abundance of room for artists, and it has been announced that PRINCIPALS OF "GO-GO" AT WGY programs from CFCN in the future One reason it is worth while to Peep Into a Broadcast Station will be supplied only by artists engaged by it. 36 JANUARY, 1924 BROADCAST STATIONS 37 As will be remembered, the original trio consisted of a cello, violin and piano. It will retain its original form on Monday nights, but it will play compositions of its own on the nights when the additional instruments will reinforce the group of players. In addition to the quintette, a solo- ist will take part in the evening's en- tertainment of the Wednesday and Friday late hour chamber music pro- grams. This will afford a pleasing variety of music and will be well worth While staying up to listen to. These late hour concerts are booked in response to requests from distant listeners, located especially throughout the middle west. As the station ordi- narily completes its programs at about 9 o'clock, distant fans who begin lis- tening at about this time, cannot hear it. Many local fans do not turn to their sets for radio entertainment un- til late in the evening. Giving pro- grams at the period of from 11 :00 to 12:00 P. M. eastern standard time IN THE TRADE -WINDS' CLIME should please both near and far away West Indies listeners. This Is WKAQ, San Juan, state of the Union, Canada, West In- dies, Mexico, Central and South HITCHY-KOO Porto Rico America. Although the station broad- BROADCASTING Station WKAQ casts twice a week (Tuesday and is located in the center of the city Friday, from 9:00 to 10:30 p. m.) of San Juan, Porto Rico. Its owner Porto Rico time, which is one hour The Radio Corporation of Porto later than 75 meridian time and four Rico is affiliated with the Internation- hours later than Pacific time, many al Telephone and Telegraph Corpora- letters have been received from Cali- tion of New York, as is its sister sta- fornia, Oregon and Washington, re- tion PWX at Havana, Cuba. The porting reception of WKAQ during first broadcasting of WKAQ was done daylight. on August 26, 1922. The entire plant is installed on the top floor of the Porto Rico Telephone Co.'s seven - Late Concerts From WBZ story building. The view from the towers, overtopping all the buildings p URSUING its policy of innovation of the city, gives a good impression of in broadcasting and of service, sta- the progress of this island in every tion WBZ has arranged "late hour" phase of civilization. On the roof of programs. The purpose of these pro- the telephone building a steel tower 87 grams is to entertain the radio fans feet high supports one side of the who are not at home in the earlier part three-wire antenna that runs 90 feet of the evening, and to give fans located horizontally to another tower 187 feet far away, particularly in the Middle above the street level. The lead-in West, a chance to listen to the Spring- comes from the center giving a "T" field station. type aerial. These late programs take place each The announcer in this particular week, on Wednesdays and Fridays, be- station is the program manager and ginning at 11 :00 P. M. On those eve- the general manager of the corporation. nings, WBZ is silent from 8:00 until The announcer gives a few suggestions 9:00 P. M. This arrangement is of to the artist and moves the microphone course tentative, but will be continued to the proper place, opens the switch if it receives the approval of the radio and announces : "This is WKAQ, audience. The first late hour program Radio Corporation of Porto Rico, San was broadcast October 31. Juan, Porto Rico, the Switzerland of The popular WBZ Trio, whose con- America, where the best coffee grows. certs have been enjoyed by thousands The next number on our program for for the past few months will be aug- RAYMOND HITCHCOCK tonight will be . . . One second mented on "late hour" broadcasts with In Person please." This is repeated again in the a clarinet and a flute, thus composing Doing his stuff at WGY. And the best part Spanish language. what will be known as the WBZ of it is, it looks just like him WKAQ has been heard in every Quintette. 38 THE WIRELESS AGE JANUARY, 1924 teristics which permits one to identify it instantly from among hundreds of Up -E Nuf others. Then, I feel as though this station WOC, Palmer School of Chiropractic had grown very dear to me. Every evening, in I "tune it in," certain to find HOUSED specially fitted rooms some kind of entertainment located on Up-E-Nuf, which will the roof provide me with an evening's recrea- auditorium of the school, the broad- casting apparatus tion. It is just what I need after a and the studio equip- hard day's And ment of WOC work. in a peculiar constitute the last uncanny way, the word in modernity. station seems to guess the sort of program which I This station has been heard in Hilo, would like to have, and it fits my Hawaii, and officially reported as hav- peculiar moods and feelings that eve- ing been heard in Stockholm, Sweden. ning. What a wonderful and sym- !Lp,-LU ts-Uit, Lim sA.:\ L)1Ir; pathetic pal it has grown to be! Of course, there are many other sta- Hans Chri sen tions to which I like to listen. Some evening, I miss one of the many voices, those voices from the ether, more ghostly than the most realistic of spirits. Another station has been dis- continued. Another voice has been stilled. It seems that, as with living Stanley W. Barnett, direc- a program thing, something has died. tor, is known as announcer I have BWS. The heard stations pass out artist caught his pose of the brilliant just as he was ether firmament, quietly, mysteriously, about to make the opening announce- ments almost noiselessly. Whither have they on one of the evening programs. gone? Except for his shirt sleeves, Barnett is And have wholly informal in the conduct of the I been wondering what studio affairs. this quality or sentiment can be, that something which attaches us to these On the other voices, which are, after all nothing hand, Erwin Swin- more than a mass of wire, batteries, dell, musical direc- and coils. What impels us, night tor, can hardly take after night, to turn the dial of the re- things so lightly. ceiving apparatus to the same point, Balancing wild jazz and to listen attentively for whatever syncopation with a station our desire has chosen for enter- variety of classical tainment that evening? What makes numbers, solos, and us turn to that favorite station, when orchestral rendi- we have listened to dozens of others, tions is no mean East and West, and North ? Val McLaughlin brings sandman and South the j ob. It is indeed a difficult thing to deter- to the kiddies each evening. The WOC has re- mine. But it must be something very "Sandman's Visits" are chosen to ceived in one week akin please children from to the instinct which prompts us two years up to as many as 12,000 to seek a particular friend ninety, and include from among every kind of communication s many in a desire to share our joy, or story, rhythmic nature, realis- poetry, from listeners -in to impart a secret. tic and fairy tales. The fairy stories within a radius of I have been thinking particularly appeal to the children be- 4,000 miles. A tele- also, as I turn the dial of my receiving set to further tween twenty-five and eighty-five or gram was received that read : "Radio explore the wide expanse of the ether ninety years old, judging by the letters broadcasting is the symbol of unself- received. ishness." that I have not been treating this favorite station of mine right. I know that every human being likes to be en- couraged, and wants to be told when The Personality of a Broad- something has caused much pleasure. I have been listening to this station for casting Station (Continued on page 68) By Lloyd Jacquet rom As I sit at my faithful radio receiv- It occurs to me suddenly, as I await ing set at this moment, listening the next number on the program, that to the whisperings of a continent, a I have known that station a long time. twist of the dial brings to me the de- It is like an old friend, which beckons lightful concert from a favorite sta- to me, and which responds willingly to tion. I have listened several minutes my nightly call. It is a living thing, to a flute solo, and as the selection ends, with a voice, and a personality. It has Lue l'ala 111. I find myself applauding. I have en- a name, it sings, it talks, it plays. It A novel communication to Wireless Age joyed the music thoroughly. has a very definite entity, and charac- printed on the back of a postal lteljkiAV..c!V./lbvJMVJJWJV,943,0)J JI.IJJ JWJVJ1lVJlMtLy9MMVNJJIJV.J.1le1VJJV./JWl1.l/3V413MVJJIetI),e(II),ItJIeIVJIV.JJll/JVJJWJII!lJV!lfeN. J, BROADCASTING STATION DIRECTORY (Revised to December 15th, 1923) d f/`DY11iA1{Y1YlifYA1Y11P/A1P* 1P/A1IYA11YA1fY1fY111YÁ1Y1f/lUY1WM/UYillYitYA1h/lif/01f/111YA1'r trip"ilYA1 heil W1f%1MYli iY1fYA1 i fYil . Kansas City, Mo. 411 Tacoma, Wash. 360 WH B Sweeney School Co Association, Denver, Colo. 360 KFEJ Guy Greason Company Cleveland, Ohio 360 KAO Young Men's Christian Corporation Denver, Coto. 360 WH K The Radiovox N. Y. 360 KFI E. C. Antttony Los Angeles, Catif. 469 KFEL Winner Radio Loew's State Theatre ....New York City, Equipment Co Denver, Colo. 240 WH N Iowa 0 Doerr Electric Co Spokane, Wash. 283 KFEP Radio Iowa Radio Corporation KFZ Mitchell KFEQ J. L. Scroggin Oak, Nebr. 360 WH X I escS nines, Pa 360 KGB Tacoma Daily Ledger Tacoma, Wash. 252 231 WI K K. & L. Electric Co KFER Auto Electric Service Co Ft. Dodge, Iowa Co., K6li Natives & Nation Radio Service, Port.and, Ore. 360 Dougias, Wyo. 263 WI L Continental Electric Supply Portland, Ore. 360 KFEV Radio Electric Shop Washington, D. C. 360 KGN Northwestern Radio Mfg. Co KFEX Augsburg Seminary Minneapmss, Minn. 261 Philadelphia, Pa. 509 KGU M. A. Mwrony ...... Honolula, Hawaii 360 Co.. WIP Gimbel Bros. Ore. 492 KFEY Bunker Hill & Sullivan Mining & Coast. Co Cincinnati, Ohio 360 KGW Oregonian I'ub. Co Portland, Kellogg, Idaho 360 WIZ Cino Radio Mfg. Ohio 229 Lacey, Wash. 256 D Richard Harris Howe Granville, KGY St. Martins College. KFEZ American Society of Mech. Engrs., St. Louis, Mo. 360 WI Washington, D. C. 273 KHl Times Mirror Co Los Angeles, Calif. 395 Ore. 360 H White & Boyer Co K F F E Eastern Oregon Radio Co Pendleton, Equipment Co Toledo, Ohio 360 «HO Louis Wasmer Seattle, Wash. 360 Boise, Idaho 360 WI K Service Radio N. Y. 360 Stockton, Calif. 360 I( F Fl Jenkins Furniture Co Radio Tel. & Tel. Co., New York, KJQ C. O. Gould Hllisboro, Ore. 229 WI X DeForest N. Y. C. 405 Seattle, Wash. 270 KFFO Dr. E. H. Smith Corp. of America-Aeolian Hall, 4(35 Northwest Radio Service Co KFFQ Marksehoffel Motor Co.... Colorado Springs, Colo. 360 WI Y Radio Hall, N. Y. C. 455 K JS Bible Institute of Los Angeles, Inc., 226 Wl Z Radio Corp. of America-Aeolian K F F R Jim Kirk Sparks, Nev. Po. 360 Los Angeles, Calif. 360 A Landaus Music & Jewelry Co., Wilkes-Barre, College Lamons, Iowa 360 WK City, Okla. 360 Monterey Electric Shop Monterey, Calif. 261 KFFV Gareeland Y Oklahoma Radio Shop.... Oklahoma KLN McGraw Co. Omaha, Nebr. 278 WK Minneapolis, 3Isnn. 360 KLS Warner Brothers Oakland, Calif. 360 KFFX WL B university of Minnesota Calif. 360 KFFV Pincus & Murphy, Inc Alexandria, La. 275 Indi annapoi is, Ind. 360 KLX Tribune Publishing Co Oakand, Dallas, Tex. 226 WL H Hamilton 3Ifg. Co. Ohio 309 Reynolds Radio Co Denver, Colo. 360 KFFZ Al. G. Barnes Amusement Co Manufaturing Co Cincinnati, KLZ KFGC Louisiana State University ....Baton Rouge, La. 254 WL W Crosley Anderson, Ind. 360 KMC Lindsay-Weatherill & Co Readley, Calif. 360 WM A Arrow Radio Laboratories 273 KFGD Chickasha Radio & Elec. Co..Chlckasha, Okla. 248 Memphis. Tenn. 500 KMl San Joaquin Light & Power Corp , Fresno, Calif. WM C Commercial Tacoma, Wash. 360 KFGF Buchanan Stevens & Co Mt. Vernon. Wash. 360 Cincinnati, Ohio 248 KMO Love Electric Co Univ., Colo. 360 WM H Precision Equipment Co. Radio Co Aberdeen, Wash. 263 KFGH Leland Stanford, Jr., Unlv.. Stanford Elec. Co KNT Grays Harbor St. Louis, Mo. 266 WM U Doubleday -Hill 4001 Los Angeles, Calif. 256 K FG.) National Guards Co., 138th Inf., Co. PittsburghN. Y. K N V Radio Supply Co 234 WN J Shotten Radio Difg. KFGL Arlington Garage Arlington, Ore. County,City. KNX Electric Lighting Supply Co., Los Angeles, Calif. 360 O Wireless Telephone Co. of Hudsons and K FG Crary Hardware Co Boone, Iowa 226 WN J. 360 I(OB New Mexico College of Agriculture Utica, Nebr. 224 Mechanical Arta, State College, N. Mex. 360 K FG Heidbreder Radio Supply Co Davenport, Iowa 484 Presbyterian Church Orange, Tez. 250 WO C Palmer School of Chiropractic KO P Detroit Police Dept Detroit, Mich. 286 KFGX First Ames, Iowa 360 KFGZ Emmanuel Missionary Co., Berrien Spgs., Mich. 268 WO I Iowa State College KOQ Modeste Evening News Modesto, Calif. 360 & Power Co...Pine Bluff, Iowa 360 423 K FHA Western State College of Colorado, WO K Arkansas Light 509 KP Hale Bros San Francisco, Calif. 252 Philadelphia, Pa. 360 Gunnison, Colo. WO O John Wanamaker 360 KQIO University of California Berkeley, Calif. 280 Kansas o. River, Ore. 360 KFHB The Rialto Theatre Hood River, Ore. WO Q Western Radio Co. 405 Apple City Radio Club Hood St. Joseph, Mo. 226 Co. City, MJ. Doubleday Electric Co Pittsburgh, Pa. 360 KFHD Utz Electric Co. WO R L. Bamberger KQV -Hill Church Shreveport, La. 266 State Marketing KQW Charles D. Herreld San Jose, Calif. 360 KFHF Central Christian WO S Missouri BJefferson City, Mo. 441 278 KFHH Ambrose A. McCue Neah Bay, Wash. 283 KRE Berkeley Daily Gazette Berkeley, Calif. 360 Fort Worth, Tex. 360 St. Louis, Mo. 546 KFHJ Fallon Co. Santa Barbara. Calif. WP A Fort Worth Record 234 ( SD Poet -Dispatch Hardware Store, i'outtr9 Farm ....New Lebanon, Rech. Lab , KFHQ Curtis Brothers WP G Nashawg Ohio 360 KSS Prest & Dean Radio Los Gatos, Calif. 242 Supply Co. Clearfield, Long Beach, Calif. 360 WP I Electric Chicago, Pa. 360 Seattle, Wash. 360 KFHR Star El ec. and Radio Co Seattle. Wash. 270 WQ X Walter A. Kushl KTW First Presbyterian Church Nelson Kans. 229 of W Printing Co., San Francisco, Calif. 360 KFHB Robert Washington ...Hutchinson, WR Radio CorporationC 360 KUO The Examiner Jenkens St. Louis, Mo. 244 Electric i Co. Hamilton, Ohio KUS City Dye Works & Laundry Co., Los Angeles, Calif. 380 K F I B Franklin W. WR K Doron Bothers N. Y. 360 258 K FIC Philip Laskowitz Denver, Colo. 224 Union College Schenectady, KUY Coast Radio Co El Monte, Calif. Iola, Kans. 246 L Urbana, III. 360 Telephone Co., Stockton, Calif. 360 KFID Ross Arbuckles Garage WR M University of Illinois KWG Portable Wireless Benson Tech. Student Body Portland, Ore. 360 KWH Los Angeles Examiner Los Angeles. Calif. 360 KFIF WR R City of Dallas (Police Tex. 360 I Electric Co Gladbrnk, Iowa 234 nt) Dallas, KXD Herald Publishing Co Modesto. Calif. 252 K F K Gladbrnk Departm KFIL Wtndlsch Elec. Farm Equipment Co.. Lab., Tarrytown, 273 Electric Shop Honolulu, T. H. 360 234 WR W Tarrytown Radio Research 429 Ill. 536 Louisburg, Kens. Atlanta, N Y.a. KYW Westinghouse Elec. & Mfg. Co....Chicago, Spokane, Wash. 252 WS B Atlanta Journal Y. 273 Allen Oakland, Calif 360 KF10 North Central High School Electric Co. N. KZM Preston, D. KFIQ Yakima Valley Radio Broadcasting. Association. WS L J. & M. AY. 360 KZN The Desert News Sait Lake City. Utah 360 WSY Alabama Power Co Birmingham, Wash. 360 Yakima, Wash. 224 Toledo, Ohio 360 KZV Wenatchee Battery & Motor Co.. Wenatchee, Juneau, Alaska 226 WSZ Marshall -Gerken Co. Elec. Mfg. Co., Pittsburgh. Pa. 326 IM U Alaska Elec. Light & Power Co., Agr. College.... MBan attann, e. 360 KDKA Westinghouse & V. H. Broyles Pittsburg, Kans. 240 WT G Kansas State Minh. 360 KOPM Westinghouse Elec. & Mfg. Co., Cleveland, Ohio. 270 KFIV P George M. McBride KFIX Reorganized Church of Jesus Christ, WT Dearborn,ayC Mich. 273 KDPT Southern Electric Co San Diego, Calif. 244 Motoreri Latter Day Saints, Independence, Kans. 240 WW 1 Ford CoDetroit, Mich. 517 K DLY Telegram Publishing Co... Salt Lake City, Utah 360 Wash. 236 WJ Detroit News Diego, Calif. 252 KFIY Brott Laboratories Seattle, W New Orleans. La. 280 KDYM Savoy Theatre San Fond du Lac, Wise. 273 W W L Loyolale University 268 Institute of Technology ...Portland, Ore. 360 K F I Z Daily Commonwealth New Orleans, La. KDYQ Oregon Brand Island, Nebr. 244 WAAB Valdemar Jensen La. 360 KDYS The Tribune, Inc Great Falls, Mont. 360 K FIA Central Power Co University New Orleans, Phoenix. Ariz. 360 KFHB Marshall Electric Co., Inc..Marshalltown, Iowa 248 WAAC .Cincinnati, Ohio 360 KDYW Smith, Hughes & Co 233 WAAD Ohio Mechanics Institute.. 286 KDYX Star Bulletin Publishing Co...Honolulu, T. H. 360 KFJC Post Intelligencer Seattle, Wash. Daily Drovers Journal K Fl D Weld County Printing & Pub. Co , Greeley, Colo. 236 W AA Chicago Wise.ii 280 KDZB Frank E. Siefert Bakersfield, Calif. 240 Gimbel Bros Milwaukee, Company Seattle, Wash. 455 K F1F National Radio Mfg. Co.. Oklahoma City, Okla. 252 WAAK Newark, IWI 3.e.. 263. KDZE Rhodes Selma, Calif. 273 WAAM L. R. Nelson Co Mo. 264 KDZF Automobile Club of So. Calif., Los Angeles, Calif. 278 K FJ H The Sugar Bowl of Missouri Columbia, Wash. 360 KF11 Liberty Theatre Astoria, Ore. 252 W AAN University Conn. K D ZI Electric Supply Co. Wenatchee, WAAQ New England Motor Sales Co., Greenwich, & Electric Co Reno, Nev. 360 KFJI Carrollton Radio Shop Carrollton, Mo. 236 Decatur,Gann 360 K DZK Nevada Machinery D. 229 Georgia Radio Co Denver, Colo. 360 KFiM University of North Dakota, Grand Forks, N. WARS OahOmaha, Nebr. 360. KDZQ Pyle & Nichols Omaha Grain Exchange Co... Bellingham, Wash. 261 K F3 R Ashley C. Dixon & Co Stevensville, Mont. 258 WAAW Emporia, s. 360 KDZR Bellingham Publishing 234 WAAZ Hollister -Miller Motor Co Seattle Radio Association Seattle, Wash. 360 K F.111 Central Power Co. Kearney, Nebr. Lake Forest, al. 266 K DZT Dexter, Iowa 224 WABA Lake Forest College 266 K OZU Western Radio Corporation Denver, Colo. 360 KFDV T. H. Warren Harrisburg, Pa. Radio Co Towanda, Kane. 226 W ABS Dr. John B. Lawrence 229 KDZV Cope & Cornwell Co Salt Lake City, Utah 360 KFJW Le Grand Battery Co Ind. Mercantile Co., Phoenix, Ariz. 360 K FIX Iowa State Teachers College... Cedar Falls, Iowa 229 WABC Fulwlder-Grimes Anderson, Ohio 229 KFAD McArthur Brothers Dodge, Iowa 246 Parker High School K FAE State College of Washington ....Pullman. Wash. 360 KFJY Tunwali Radio Co Fort WARD Washington, D. C. 283 . M. C. A Radio Corporation Denver, Colo. 360 K F1 Texas National Guard, 11sth Cas., WABE Y Mt: Vernon, Ill. 234 KFAF Western Fort Worth, Texas 254 W ABF Mt. Vernon Register -News Co.. K FAJ University of Colorado Boulder, Colo. 360 Piano Co Jacksonville, Fla. 248 Moscow, Idaho 360 KFKA Colorado State Teachers College...Greeley, Colo. 248 W ABG Arnold Edwards Ohio 2 0 KFAN Electric Shop Shore Tire Co Publishing Co Butte, Mont. 360 K F KB Brinkley -Jones Hospital Association, WABH Lake Me. 240 KFAP Standard Milford. Kans. 286 Bangor Railway and Electric Co ...Bangor, KFAR Studio Lighting Service Co....Hollywood, Calif. 280 WABI South Bend, Ind. 240 T. Donohue Eugene, Ore. 275 K F K H Denver Park Amusement Co Lakeside, Colo... 226 WA B1 Radio Laboratories Mass. 252 KFAT Dr. J. Conway, Ark. 224 Church Worcester, KFAU Independent School District of Boise City KFKQ Conway Radio Laboratories WABK First Baptist Storrs, Conn. 283 Boise, Idaho 270 K F K V F. F. Gray Butte, Mont. 283 W ABL Connecticut Agri. College Mich. 254 Co Hastings, Nebr. 286 E. Doherty Saginaw, KFAV Abbot Kinney Company Venice, Calif. 258 KF KX Westinghouse Electric W ABM F. Crosse, Wise. 234 Nasour Bros. Radio Co.. Colorado Springe, Colo. 234 C. Grover La KFAV W. J. Virgin Medford. Ore. 283 KFKZ WARN Waldo Rochester, 252 White, KFLA Abner R. Wilson Butte, Mont. 283 W ABO Laite Avenue Baptist Church 252 KFAW The Radio Den; Ashford & 248 N. Y. Santa Anna, Calif. 280 KFLB Signal Electric Mfg. Co Menominee, Mich. W ABP Robert F. Weinhig 261 KFLD Paul E. Greenlaw Frankiinton, La. 234 College Radio Club...HTerford F. A. Buttrey & Co Havre. Mont. 360 W ABQ Haverford , Ohio 270 KFBB K FLE National Educational Service Denver. Colo. 268 High School KFBC W. K. Azbill San Diego, Calif. 360 WABR Scott Newd,ledo.e N. 244 Luis Calif. 360 K F L H Erickson Radio Co., Inc.... Salt Lake City, Utah 261 WABS Essex Mfg. Co. 252 KFBE Reuben H. Horn San Obispo. M. Foster Cedar Rapids, Iowa 240 Washington,k.Pa. Kimball -Upson Co Sacramento, Calif. 283 KFLP Everett WABT Holliday -Hall J. 226 KFBK KFLA Bizzell Radio Shop Little Rock, Ark. 261 W Victor Talking Machine Co KFBL Leese Bros Everett, Wash. 224 ABU Camden,ln, N.Te J. 263 Co., KFLR University of New Mexico.. Albuquerque, N. M. 254 WABV John H. De Witt, it 360 KFBS Chronicle News and Gas & Elec. Supply San Ben Ito, Tex. 236 Corp Princeton, Ind. Trinidad, Culo. 360 KFLU Rio Grande Radio Supply House, WAJV Indian Pipe Line Ind. 360 Rev. A. T. Frykman Rockford, Ill. 229 West Princeton, S. Thomas Laramie. 283 KFLV W BA Purdue University Co., KFBU Bishop N. Co Missoula, Mont. 234 Co. and Journal Printing Ore.yo 360 KFLW Missoula Electric Supply W BAD Sterling Electric 360 KFCD Salem Eler. Co KFLX George R. Clough Galveston, Texas 240 Minneapolis, Minn. KFCF Frank A. Moore WallaB 360 Minneapolis, Minn. 417 Fargo Radio Supply Co Fargo, N. D. 231 - Service Station Wait,s Mani 360 KFLP W BAH The Dayton Co 244 K FCH Electric KFLZ Atlantic Automobile Co. Atlantic, Iowa 273 Wireless Phone Corporation 'KFCK Colorado Springs Radio Co.. WBAN Paterson, NI J.. 360 Springs, Colo. 242 KFMQ University of Arkansas Fayetteville, Ark. 263 WBAO James Millikin University Colorado Anthony, Kans. 261 Co., TheF Star 360 WBL T. & H. Radio Co W BAP Wortham-Carter Pub. 476 K FCM Richmond Radio Shop Richmond, Calif. W May Co Newark, N. J. 360 ort Telegram, Utah 360 BS & 390 KFCP Ralph W. Flygare Ogden, WBT Southern Radio Corporation ....Charlotte, N. C. 360 Co Columbus, Ohio Casper, Wyo. W BAV Erner & Hopkins Ohio 390 KFCQ Motor Service Station W BZ Westinghouse Elec. & Mfg. Co., . Springfield, Mass. 337 Houston, Tez. 360 W BA Marietta College 3606 KFCV Fred Mahaffey, Jr WCE Findley Electric Co Minneapolis, Minn. 360 Stenger, Ir Wilkes-Barre, 'KFCY Western Un ion College LeMars, Iowa 252 WBAX John H. York, N. Y. 360 WC K Stia -Baer -Fuller St. Louts, Mo. 360 Western Electric Co New KFCZ Omaha Central High School Omaha, Nebr. 258 University of Texas Austin, Texas 360 WBAY Newark, Ohiohi 240 Ore. 360 WCM WBBA Newark Radio Laboratory ao KFDA Adler's Music Store Baker, Reading, hi 224 WCX Detroit Free Press Detroit, Mich. 517 WBBD Barbey Battery Service Re KFDB Mercantile Trust Co San Francisco, Calif. 509 WDM Church of the Covenant Washington, D. C. 360 CPittsburgh, Y. 280 St. Michaels Cathedral Boise, Idaho 360 WCAD St. Lawrence University Pa. 462 'KFDD WDT Ship Owners Radio Service, Inc., Premier Grand & Baer Co KFGF Wyoming Radio Corp Casper. Wyo. 360 Piano Corporation, New York, N. Y. 405 WCAE Kaufman Tucson, 360 W Michigan Limestone & Chemical KFDH University of Arizona Ariz. Bush Tuscola. III. 278 CAF l'o..Rodgers, Mich. 360 360 WDZ James L. KFDI Oregon Agri. College Corvallis. Ore. WEB Benwood Co. St. Louis, Mo. 360 New Orleans, La. 268 Knight -Campbell Music Co Denver, Colo. 360 WCAG Clyde R. Randall 286 KFDL WEV Hurlburt-Still Electrical Co Houston, Tex. 360 Electric Co Columbus, Ohio KFDD H. E. Cutting Bozeman, Mont. 248 St. Louis, Mo. 261 W CA Entrekin WEW St. Louis University Nebraska Wesleyan UniversiUníversite K F D R Bullock's Hardware & Sporting Goods, Strawbridge & Clothier Philadelphia, Pa. 395 WCAJ Pl., Nebr. 360 Nebr. 360 W FI York, WFY Cosradio Co. Wichita, Kans. 360 Tex. 360 WCAK Alfred P. Daniel Houston, KFD U Nebraska Radio and Electric Co., Iincoln. Nebr. 240 WGI American Radio and Research Corporation, Northfield, Minn. 360 Gilbreth & Stinson Fayetteville, Ark. 360 Medford Hillside, Mass. 360 W CAL St. Olaf College 360 KFDV Villanova College Villanova, Pa. K F D X First Baptist Church Shreveport, La. 360 WGL Thomas F. J. Howlett Philadelphia, Pa. 360 W CAM Md. 360 WCAO Sanders & Stayman Co Baltimore, KFDV South Dakota State College of Agri. & Mech. W G R Federal Tel. & Tel. Co Buffalo, N. Y. 319 WCAP Chesapeake & Potomac Tel. Co , Arts, Brookline, S. D. 380 WGV Interstate Electric Co New Orleans, La. 360 Washington, D. C. 469 Minneapoiis. Minn. 231 WGY General Electric Co Schenectady, N. Y. 380 Antonio, Tex. 360 KFDZ Harry O. Iverson Wise. WCAR Alamo Radio Electric Co San KFEC Meier & Frank Co Portland, Ore. 360 WHA University of Wisconsin Madison, 360 39 40 THE WIRELESS AGE JANUARY, 1924 WCAS Dunworthy Industrial Institute, Minneapolis, Minn. 246 WIAQ Chronicle Publishing Co Marion, WPAB Pennsylvania W CAT South Dakota School of Mines Rapid Ind. 226 State College -State College, Pa. 283 City, S. D. 240 WIAS Burlington Han keye-Home Elec. Co., W PAC Donaldson Radio Co. Okmulgee, WCAU Durham & Co. Philadelphia, Pa. 286 Okla. 360 W Burlington, Ia. 360 WPAD Wleboldt & Co. Chicago, Ill. 360 CA J. C. Dice Electric Co Little Rock, Ark. 360 WIAT Leon T. Noel WPAG Central WCpX University of Vermont Tarkio, Mo. 360 Bailin Co.. Inc Independence, Mo. 360 Burlington, Vt. 360 WIAU American Sec. & San. Bank Le Mars, Ia. 360 WPAH Wisconsin Dept. of Markets WCAY Kesselman O'Driscoll Music House, WIAV Waupaea, Wisc. 360 New York Radio Laboratories, Binghamton, N. Y. 360 WPAJ Doolittle Radio Corporation...New Haven, Conn. 268 Milwaukee, Wisc. 261 WIAW Saginaw Radio & Elec. Co Saginaw, Mich. 360 WPAK No. Dakota Agricultural College...Fargo, WCAZ Carthage College WJAD N. D. 360 Carthage, III. 246 Jackson's Radio Eng. Lab Waco, Tea. 360 WPAL Superior Radio & Telephone Co., Columbus, Ohio 286 WCBA Charles W. Haimbach Allentown, Pa. 280 WJAF Press Pub. WPAM Awerbach WCBD Zion Radio Broadcasting Co Muncie, Ind. 360 & Guettel Topeka, Kans. 360 Station Zion, Ill. 345 W1 AG Huse Publishing Co Norfolk, Nebr. 360 WPAP Theodore D. Phillips Winchester, W DA Tampa Daily Times Tampa, WPAQ Ky. 360 Fla. 360 WJAJ Y. M. C. A Dayton, Ohio 360 General Sales & Eng. Co Frostburg, Md. 360 W DA Kansas City Star Kansas City, Mo. 411 WIAK Rev. C. L. White WPAR R. A. Ward W DAG Martin Greentown, Ind. 254 Beloit, Kans. 360 J. Laurence Amarillo, Tex. 263 WJAM D. C. Perham Cedar Rapids, Iowa WPAS J. & M. Electric Co Amsterdam, W DA Trinity Methodist Church El 268 N. Y. 360 Paso, Texas 268 WJAN Peoria Star Co Peoria, I11. 280 WPAT St. Patrick's Cathedral El Paso, Tex. 360 W DA Hartford Courant Hartford, Conn. 261 WJAR The Outlet Co WPAU Concordia College Moorhead, W DAL Florida Times Providence, R. I. 360 Minn. 360 Union Jacksonville, Fla. 360 WJAS Capper Publications Topeka, Kans. 360 WPAP Bangor Radio Laboratory Bangor, Me. 360 WHAM Weston Electric Co New York, N. Y. 360 WJAT Kelly-Vawter Jewelry WPAZ John R. Koch WDAO Automotive Electric Co Marshall, Mo. 360 Charleston. West Va. 273 Co Dallas, Tex. 360 WJAX Union Trust Co Cleveland, Ohio 390 WQAA Horace A. Beale, Jr Parkersburg, W. Va. 360 W DAP The Board of Trade Chicago, III. 360 WJAZ Chicago Radio Laboratory WQAC E. B. Gish Amarillo, W DAR Chicago, Ill. 448 Tex. 360 Lit Brothers Philadelphia, Pa. 395 WKAA H. F. Paar Cedar Rapida, WQAD Whitehall Electric Co. Waterbury, Conn. WDAS Samuel W. Walte Iowa 268 WQAE Moore 242 Worcester, Mass. 360 WKAD Charles LooR East Providence, R. I. 240 Radio News Station Springfield, Vt. 275 W DA Slocum & Kilburn New Bedford, Mass. 360 WKAF W. S. Radio Supply WQAF Sandusky Register Sandusky, WDAX Co and Wm, Schack, Ohio 240 First National Bank Centerville, Iowa 268 Wichita WQAH Brock Anderson Elec. Eng. Co., Lexington, Ky. 254 WDAY Fargo Radio Service Falls, Tea. 360 WQAK Appel Co Fargo, N. D. 244 W KAN Alabama Radio Mfg. Co Montgomery, Ala. 360 -Higley Electric Co Dubuque, Iowa 360 WDBC Kirk Johnson & Co., Inc Lancaster, Pa. 258 W KAP Dutee Wilcox WQAL Cole County TeL & Tel. Co Mattoon, WEAA Flint Cranston, R. I. 360 WQAM Ill. 258 Fallain & Lathrop Flint, Mich. 280 WKAQ Radio Corporation of Porto Rico, San Eleetrical Equipment Co. Miami, Fla. 360 WEAE Juan, P. R. 360 W QA N Scranton Virginia Polytechnic Institute.. Blacksburg, Va. 360 WEAR Michigan Agri. College..,East Lansing, Mich. 280 Times Scranton, Pa. 360 WEAF American Tel. & Tel New York, N. Y. 492 W KAS L. E. Lines Music WQAO Calvary Baptist Church New York, N. Y. WEAH Co Springfield, Mo. 360 WQAQ \Vest 360 Wichita Board of Trade Wichita, Kane. 244 WKAV Laconia Radio Club Laconia, N. H. Texas Radio Co Abilene, Tex. 360 WEAI Cornell University 254 WQAS Prince Walter Co. Ithaca, N. Y. 286 WKAW United Battery Service Co., Montgomery, Ala. 226 Lowell. Mass. 266 WEM University of South Dakota.... Vermillion, S. D. 283 WKAY Brenau College WQAT Radio Equipment Corporation Richmwd, Gainesville, Ga. 280 WQAV Va. 360 WEAM North Plainfield, Borough of Plainfield, WLAG Cutting & Washington Radio Corp., Huntington and Guerry, Inc.. ..Greenville, S. C. 258 North Plainfield, N. J. 252 W QA W Catholic University of America, WEAN Shepard es, Minn. 417 Co Providence, R. I. 273 WLAH Samuel Woodworth use, N. Y. 234 D. C. 236 WEAO Ohio State University WLAJ Waco Syr WQAX Co. Peoria, Columbus, Ohio 360 Electrical Supply Co Waco, Tex. 360 WRAA RadioWashington, Ill. 360 WEAP Mobile Radio Co., Inc Mobile, Ala. W LA Vermont Farm Mach. Rice InstituteEquipment 240 360 Co....Bellows Falls, Vt. 360 W RA D Taylor WEAR Baltimore Am. & News Pub. Co., Baltimore, Md. 380 WLAL Tulsa Radio Co Tulsa, Radio ShopHouston, KTans. WEAS Hecht Company WLAN Okla. 360 WRAF Radioad Club, Inc. MLaporte Washington, D. C. 360 Putnam Hardware Co Houston, Me. 283 WRAH gInd. 224 WEAU Davidson Brothers Co Sioux City, Iowa WLAP W. V. Jordon Stanley N. Reed Providence, R. I. 231 WEAY 360 Louisville, Ky. 360 WRAL Northern States Power Will Horwitz, Jr Houston, Tex. 360 WLAQ Arthur S. Schilling Kalamazoo, Mich. 283 Co. -St Croix Falls, Wise. 248 WEAZ Donald Redmond Waterloo, WOAR Henry P. WRAM Lombard College Galesburg, 244 Iowa 380 Lundakow Kenosha, Wisc. 229 WRAN Black -Hawk Ill. WFAA A. H. Belo & Ce Dallas, Tex. 476 WLAS Central Radio Supply Co Hutchinson, Electric Co Waterloo, Iowa 236 W FAB Kans. 244 WRAO Radio Service Co. Carl C. Woese Syracuse, N. Y. 234 WLAT Radio and Specialty Co Burlington, Iowa 360 St. Louis, Mo. 360 W FA Henry C. Spratley Poughkeepsie, WLAV Electric Shop, WRAV Antioch College Yellow Springs, Ohio 380 N. Y. 273 Inc Pensacola, Fla. 254 W RA W Horace WFAG Radio Engineering Laboratory, Waterford, N. Y. 360 WLAW New York Police Dept D. Good Reading, Pa. 238 WFAH Electric New York, N. Y. 360 WRAX Flexon'a Garage Gloucester Supply Co Port Arthur, Tex. 236 W LAX Greencastle Community Broadcasting WRAY City, N. J. 288 W FM Hi -Grade Wireless Instrument Station, Radio Sales Corporation Scranton, Pa. 280 Co., Greencastle, Ind. 231 WRAZ Rensselaer Asheville, N. C. Polytechnic Institute Troy, N. Y. 380 360 WMAB Radio Supply Co Oklahoma City, Okla. 360 WSAA B. S. Sprague Elec. WFAM Times Publishing Co St, Cloud, Minn. 360 W MAC J. Edward Co Marietta, Ohio 360 W FAN Page Cazenovia, N. Y. 261 WSAB Southeast Mo. State College, Hutchinson Elec. Service Co.. Hutchinson, Minn. 360 W M A F Round Hills Radio W FAQ Missouri Wesleyan Corp Dartmouth, Mass. 360 College & Cameron Radio WMAH General Supply Co WSAC Clemson Agri. Capeo. Lincoln, Nebr. 254 College ....Clemson Col ege,r,S.MC. 33880 Co., Cameron, Mo. 360 WMAI Drovers Telegram Co WSAD J. A. WFAT Daily Argus Leader Kansas City, Mo. 275 Foster Co. Providence, R. I. 261 Sioux Falls, S. D. 360 WMAK Norton Laboratories Loekport, N. Y. WSAH A. G. Leonard, Jr WFAV University of Nebraska Lincoln, Nebr. WMAL Trenton 360 Chicago, Ill. 248 275 Hdw. Co Trenton, N. J. 250 WSAI U. S. Playing Card Co Cincinnati, Ohio WGAC Orpheum Radio Stores Co Brooklyn, N. Y. 360 WMAN First Baptist Church WSAJ Grove City College 309 WGAD Spanish Am. Sch. of Columbus, Ohio 286 Grove City, Pa. 368 Telegraphy, W MAP Utility Battery Service, Inc Easton, Ohio 246 WSAL Franklin Electrical Co Brookville, Enconada, P. R. 360 WMAQ Chicago Ind. 246 Daily News Chicago, Ill. 448 WSAN Allentown Radio Club Allentown, Pa. 229 WGAJ W. H. Glass Shenandoah, Iowa 360 WMAV Alabama Polytechnic WSAP Seventh Day WGAL Lancaster Institute....Auburn, Ala. 250 Adventist Church ..New York, N. Y. 263 Elec. Supply & Const. Co., WMAW Wahpeton Elec. Co Wahpeton, N. D. 360 WSAR Doughty & Welch Elec. Co....Fall Lancaster, WMAY Kingshighway Presby. WSAT River, Mass. 254 Pa. 248 Church... .St. Louis, Mo. 280 Plainview Elec. Co. Plainview, Tex. 268 WGAN Cecil E. Lloyd Pensacola, Fla. 360 WMAZ Mercer University Macon, Ga. 268 WSAW Curtice & McElwee Canandaigua, WGAQ W. G. Patterson WNAB Park City N. Y. 275 Shreveport, La. 360 Daily News Bowling Green, Ky. 360 WSAX Chicago Radio Laboratory Chicago, Dl. 268 WGAW Ernest C. Albright Altoona, Pa. 261 WNAC Shepard Stores Boston, Mass. 278 WSAY Irving Austin, Chamber of Commerce, WGAX Radio Electric WNAD Oklahoma Radio Co., Washington Courthouse, Ohio 360 Eng. Co Norman, Okla. 360 Port Chester, N. Y. 233 WGAY North Western Radio Co Madison, Wisc. 360 W N A L R. J. Rockwell Omaha, Nebr. 242 WSAZ Chase Electric N Shop Pomeroy, Ohio 258 WGAZ South Bend Tribune South Bend, Ind. 360 W A M Ideal Apparatus Co. Evansville, Ind. 360 WTAB Fall River Daily WHAA State WNAN Syracuse Radio Herald Fall River, Mass. 248 University of Iowa Iowa City, Iowa 283 Telephone Co Syracuse, N. Y. 286 WTAC Penn Traffic Co. Johnstown, Pa. WHAB Clark W. Thompson Galveston, Tex. WNAP Wittenberg College Springfield, Ohio WTAD Robert 360 360 WNAQ Charleston 360 E. Compton Carthage, Ill. 229 WHAC Cole Brothers Elec. Co Waterloo, Iowa 360 Radio Elec. Co Charleston, S. C. 360 WTAG Kern Music Co. Providence, W HAD Marquette University Milwaukee, WNAR Rhodes, C. C. Butler, Mo. WTAH R. I. 258 Wisc. 360 WNAS 231 Carmen Ferro Belvidere, Ill. 236 WHAG University of Cincinnati Cincinnati, Ohio 222 Texas Radio Corporation and Austin WTAJ The Radio Shop Portland, WHAH J. T. Griffin Statesman, Austin, WTAL Me. 238 Joplin, Mo. 360 Tea. 360 Toledo Radio and Electrical Co , Toledo, Ohio 252 WHAK Roberts Hardware Co Clarksburg, West Va. 258 WNAT Lenning Bros. Co. Philadelphia, WTAM Willard Storage Battery Co....Cleveland, WHAM Eastman School WNAV Pa. 360 WTAN Ohio 390 of Music of Univ. of Rochester, Peoples Tel. & Tel. Co Knoxville, Tenn. 236 Orndorff Radio Shop Mattoon, Ill. 240 Rochester, N. Y. 283 WNAW Henry Kunzmann Fortress Monroe, Va. WTAP Cambridge Radio & Electric Co. .Cambridge, W HAP Dewey 360 WTAQ Ill. 390 L. Oita Decatur, Ill. 360 WNAX Dakota Radio Apparatus Co Yankton, S. D. 244 S. H. Van Gorden & Son Osselo, Wisc. 226 WHAR Paramount Raclin and Elec Co., WNAY Ship Owners' Radio Service Baltimore, WTAR Reliance Electric Co. Md. 360 WTAS Norfolk, Va. 226 Atlantic City, N. J. 231 WOAA Dr. Walter Hardy Ardmore, Okla. 360 Charles E. Erbstein Elgin, Ill. 275 WHAS Courier Journal & Times Louisville, Ky. 400 WOAC Maus Radio Co. Lima, WTAT Edison Elect. Ill, Co Boston, Masa. WOAD Ohio 266 WTAU 244 WHAV Wilmington Elec. Friday Battery & Elec. Co Sigourney, Iowa 360 Ruegy Battery & Elec. Co Tecumseh, Nebr. 360 & Supply Co , W OA Midland College WTAW Agricultural and Mech. Wilmington, Del. 360 Fremont, Nebr. 360 College, WOAF Tyler Commercial College Tyler, Tea. 360 College tion, Tex. WHAX Huntington Press Huntington, Ind. 360 WOAG Apollo Theatre Belvidere, WTAX Williams Hardware Co WHAZ Rensselaer WOAH Ill. 224 Streator, Ill. 231 Polytechnic Institute Troy, N. Y. 380 Palmetto Radio Corp Charleston, S. C. 360 WTAY Iodar-Oak Leaves Broadcasting Station, WIAB Joslyn Automobile Co Rochford, Ill. 360 WOAI Southern Equipment Co San Antonio, Texas 385 WIAD Howard R. Miller WOAD Ervin's Oak Park, Ill. 226 Philadelphia, Pa. 254 Electrical Co. Parsons, Kans. 360 WTAZ Thomas J. McGuire WIAF Gustav A. De Carlin New Orleans, WOAL Wm. Evans Woods Webster Lambertville, N. J. 283 La. 234 Groves, Mo. 286 WWAB Swern Hoenig & Co Trenton, WIAH Continental Radio and Mfg. Co., Inc., WOAN James D. Vaughan Lawrenceburg, Tenn. 360 WWAC N. J. 226 WOAP Kalamazoo College Sanger Brothers Waeo, Tex. 360 Newton, Iowa 258 Kalamazoo, Mich. 360 WWAD Wright Wright, Philadelphia, WIAI Heers W OAT Boyd Martell Hamp Wilmington, Del. 360 360 Stores Co Springfield, Mo. 252 WOAV Pennsylvania WWAE Alao Dance liet Ill. 227 WIAK Journal Stockman Co National Guard Erie, Pa. 242 W WA Galvin Radio Omaha, Nebr. 276 WOAW Woodmen of the World Omaha, Supply Co Camden, N. J. 236 WIAP J. A. Rudy & Sons Paducah, Ky. 360 Nebr. 526 WWAH General Supply Co. Lincoln, WOAX Franklyn J. Wolff Trenton, N. J. 240 WWAO Nebr. 360 Michigan College of Mines.... Houghton, Mich. 244 Canadian Broadcasting Stations CKY Telephone Manitoba System Winnipeg, Manitoba CNBC The Albertan Publishing Co CF AC Radio Corporation of Calgary, Alberta CJCH The United Farmers of Ontario Toronto, Calgary, Ltd...Calgary, Alberta CHCA Radio Corporation of Vancouver, Ltd., Vancouver, B. C. Ontario CFCA Star Publishing and Printing Co., Toronto, Ontario CHCB Marconi Wireless CJCI McLean, Holt & Co., Ltd. -St. John, New Brunswick CFCB Marconi Wireless Telegraph Co. of Canada, Ltd.. C1CN Simons Agnew Telegraph of Canada, Ltd., Toronto, Ontario & Co Toronto. Ontario Vancouver, B. C. CHCC CJCS Eastern Telephone and Telegraph Co., CFCB Canadian Westinghouse Co., Ltd., Edmonton, Alberta Ltd.. Canadian Westinghouse Co., Ltd., CHCF Radio Corporation of Winnipeg, Ltd., Halifax, Nova Scotia Winnipeg, Manitoba Winnipeg. Manitoba Cl CY Edmund Taylor Calgary, Alberta CFCE Marconi Wireless Telegraph Co. of Canada, CHCQ The Western Radio Co., Ltd Calgary. Alberta CJGC London Free Press Printing Co., Ltd., London, Ontario Halifax, Nova Scotia CHCS London Radio CINC Tribune Newspaper Co., Ltd CFCF Marconi Wireless Telegraph Shoppe London, Ontario Winnipeg, Manitoba Co. of Canada, Ltd., CHCX B. L. Silver Montreal, Quebec CJSC The Evening Telegram Toronto Ontario Montreal, Quebec CHCZ The Globe Printing Co. CKAC La Presse Publishing CFCH Abitibi Power and Paper Toronto, Ontario Co Montreal, Quebec Co., Ltd., CHFC John Millen & Sons, Ltd Toronto, Ontario CKCB T. Eaton Co., Ltd Winnipeg, Manitoba Iroquois Falls, Ontario CHIC Canadian Westinghouse CKCD Vancouver CFCI Motor Products Co., Ltd....Hamilton, Ontario Daily Province Vancouver, B. C. Corporation Walkerville, Ontario CHOC Canadian Westinghouse Co., Ltd.....Vancouver, B. C. CKCE Canadian Independent CFCN W. W. Grant Radio, Ltd Calgary. Alberta CHVC Telephone Co , Ltd., Metropolitan Motors, Ltd Toronto, Ontario Toronto, Ontario CFCX The London Advertiser London, Ontario CHXC J. R. Booth, Jr Ottawa, Quebec CKCK Leader Publishing CFPC International Radio Development Co., CHVC Northern Co., Ltd., of Regina, Electric Co. Montreal, Quebec Regina, Saskatchewan Fort Frances, Ontario CJBC Dupuis Freres Montreal, Quebec CKCR Jones CFTC The Bell Telephone Co. of Canada Toronto, Electric Radio Co St. John, New Brunswick Ontario CICA The Edmonton Journal, Ltd Edmonton, Alberta CKCS The Bell Telephone Co. of Canada...Montreal, CFUC University of Montreal Montreal, Quebec C1CB James Gordon Bennett Nelson, British Columbia CKCZ Canadian Westinghouse Quebec CFVC Roy Russell Brown Courtenay, British CJCD T. Co., Ltd Toronto, Ontario Columbia Eaton Co., Ltd Toronto, Ontario CKKC Radio Equipment and Supply Co Toronto, CFYC Victor Wentworth Odium Vancouver, B. C. CJCE Vancouver Sun Radiotelephones. Ltd., Vancouver, B. CKOC The Ontario CFZC Canadian Westinghouse Co., Ltd Montreal, C. Wentworth Radio Supply Co....Hamilton, Ontario Quebec C1CF News Record, Ltd. Kitchener, Ontario CKQC Radio Supply Co. of CH AC Radio Engineers, Ltd Halifax, Nova Scotia CICG Manitoba London London, Ontario Free Press Co., Ltd.... Winnipeg, Manitoba CKZC Salton Radio Engineering Co Winnipeg, Manitoba JWJVJJmmim.lIJV.IJVJJV./Jll/J JVJntlV./JV./et V..tJWJVJmo./mmi!JVJJI1NmmeJVJVJV.lJW1V./JI3.43.J-1V.JJVemeJV.JWVJJ Afloat and Ashore With the Operator As Reported by W. S. Fitzpatrick í . . r/\lt/ín1rrA1rreMelrn-lnilU%.1 . fY.Y1;r.,11r.firrelfY rAirÁir(YIMr/ín1tYiAln-.l'IIMInA1r(11niLlri1111. .,ifr.111rJrr/ín1MfrÁilrA1r'/ínlrr.l1r./ pleasant fortnight in Eng- THE, radio section of HOW DO THEY GET LIKE THAT"' PITY HE CAN.( land. Returning to New New York Po- CARRY THE SET the York he was transferred has AROUND AND SHOW lice Department HEY! M.. BRING HE OUGHT TO HAVE IT TO THE GIRLS HIS CALL LETTERS to the Sutermco, which received many well de- THE CAMERA "CO"AND"ORU" IN ISN'T HE brought him back to San notices of its GOLD ON HIS COLLAR served press GRAND? Francisco, ending a quick, activities and attained re- that pleasant and profitable sults, but it appears journey and fulfilling his radio opera- STENO commercial wish. tors as a whole, much less * * * public, are not the general A well known radio as well informed as they regarding the operator told this as an should be original story the other service rendered and the of KUVS day. An old lady making achievement her first sea voyage no- its subsidiary sta- and ticed the radio operators tions on the police boats INDOOR RADIO e- lounging easily and hav- about the harbor. SPORTS - RAZZING THE GUY ing a general pleasant The section was or- WHO WEARS HIS UNIFORM ASHORE time, while the captain ganized in 1917 by Ser- for- E. Pearce and chief mate were geant Charles about the ship, look- time later was placed under Department, who alternate duty be- ever hurrying and a.short ing at this and that and always Inspector M. R. Brennan, Superinten- tween the headquarters station and the busy. Evidently she had made a com- dent of Telegraph of the Police De- police boats. These boats frequently Pearce as go out into the open sea, so the men parison between the two lines of en- partment. With Sergeant af- radio head and as Inspec- might well be termed seagoing oper- deavor and when the opportunity the practical hailed the captain and inquired tor Brennan's chief adviser, the organ- ators. forded into a high state In addition to the assistant oper- very sweetly: ization was developed have Two years ago Sergeant ators, the repair and apparatus men, "Oh, captain, how long do you of efficiency. present position be- Pearce retired from the Police Depart- the personnel of New York's police to serve in your F. fore you become a radio operator?" ment to enter the service of the Radio radio experts consists of John is Ward. Charles E. Gaul, Charles E. Corporation of America, in which he * * * now an executive. Francis, Russell McKee, George Wolfe There is an efficient corps of oper- and Louis J. Michaels. During several A comparison is often made between ators, all with first class government years before joining the Police Depart- the present day marine radio working licenses and all members of the Police ment, Mr. Michaels was an operator with that of a few years ago before on passenger ships and is well known the vacuum tubes came into use. The among commercial radio men. radio fan of today imagines that long Quite a number of communications distance receiving was unheard of and pass between big passenger liners and that broadcasting is not more than the headquarters station and boats and three years old. there have been occasions when cargo were well served by the alertness Mr. C. D. Guthrie, now radio super- ships office of the police operators. visor of the New York district * * * of the Shipping Board, used to listen for to music being broadcast from a An example of the opportunity naval ship during the Jamestown Ex- travel afforded radio men can be cited The writer heard in position in 1907. by Paul S. Barnard, who lives San in 1910. Ships running on an opera broadcast Francisco and who was running to South America used to ships out of that port. He wanted to with chief maintain direct communication see England. When he told the two and three thou- of his de- New York up to operator at San Francisco sand miles around 1909. San Francis- sires that very accommodating gentle- and running to co, with a five kilowatt transmitter man, having no ships direct detector, exchanged weather re- him on, gave him an crystal England to place and names with Japan, a dis- Isthmian liner Steel - ports assignment to the tance of 5,800 miles, in 1910. age, bound for New York, then passed the word by mail to the chief operator Charles A. Hahne, now traffic man- at New York, requesting that Bar- ager of a radio company, was instru nard's wish be respected, if possible. mental in saving the life of William Upon the operator's arrival in New Jennings Bryan and other passengers York, he was without loss of time on a ship over two thousand miles he was a Sergeant Charles E. Pearce, who built and transferred to the Eastern Tempest, away from New York, where operated the first successful Police Radio Sta. a coast operator, in 1911. tion in the world on which he was enabled to spend station 41 WORLD WIDE ¡" WIRELES S RADIO NEWS FROM ALL OVER THE WORLD Government's Preparation for mittee will be made, and in event of sets are reported from the farms of Mexico City Conference approval, it will form the basis of the Saratoga County alone. There are "U. S." agenda to be carried to the about 3,085 sets on Texas farms. on the agenda of the United Pan-American conference early in Farms in other states are reported as WORK for the forthcoming - States Inter 1924 in Mexico. Later on, the agree- follows: In Illinois, 2,814; in Ohio, American Electrical Communications ments arrived at there may be presented 2,620; in Missouri, 2,861 ; in Iowa, Commission, scheduled for January or to the World Conference on Electrical 2,463, and in Kansas, 2,054. New February in Mexico City, is progress- Communications in Paris, by accredited Jersey, Pennsylvania, Michigan and ing rapidly. The 'Inter -Departmental representatives of the New World. Minnesota have between 1,000 and Committee on Electrical Communica- 2,000 sets each. tions under the direction of Leland Harrison, Assistant Secretary of State, Los Angeles has organized a special sub -committee to Hold Show Second Annual Western Radio which is attacking the practical and THE Owen D. Young for operating problems having to do with and Electrical Exposition will be Reparation international radio communications. held at the Biltmore Hotel from Feb- Commission Judge S. B. Davis, Solicitor of the ruary 5 to 10. J. C. Johnson, of New selection York radio of Owen D. Young, Department of Commerce, and repre- fame, will manage the THEChairman the show. of Board of Di- sentative of that department on the rectors of the Radio Corporation of Communication Committee, has been America to be one of the two Ameri- head radio sub- designated as of the Progress of Radio on can experts serving on the committee committee and has appointed two sec- the Farm which will investigate Germany's abil- tions, one on technical problems and A GENTS of the Department of ity to pay is one that illustrates Presi- another on mobile radio questions. Agriculture have estimated after a dent Coolidge's shrewd evaluation of Dr. J. H. Dellinger, of the Bureau careful survey that there is a total of men and one that wins the hearty com- of Standards, is chairman of the sec- more than 145,000 radio sets on farms mendation of business men and men of tion on technical radio problems. This throughout the country. In New York affairs to whom Mr. Young's out-. section is considering such problems as it is estimated that there are 5,502 sets standing qualifications and accomplish- frequency, or wave length, allocation, on farms. Two thousand five hundred ments are well known. means of preventing radio interference, and standards of technical operation, as well as the gathering of technical data relative to radio transmitting Army Radio at Panama Canal Post stations. The section studying questions af- fecting mobile radio operation is headed by Commander D. C. Bingham, Asst. Director of Naval Communications. Questions affecting international rules regarding the operation of radio on board ships, aircraft, etc., will be stud- ied by this committee. Among the subjects to be covered are: distress calls and matters pertaining to safety of life at sea, time signals, hydrogra- phic and meteorological information of international interest. Advice and suggestions from repre- sentatives of commercial companies will be sought on the matters under consideration, including standardiza- tion of practice and operation, in which agreements with other American Re- publics are desired. Upon the completion of the two sur- veys by the United States Government A detachment of the 10th Signal Company with radio tractor on the beach of Belle Vista, Radio Committee, a comprehensive re- Republic of Panama port to the full communication com- 42 WIRELESS 43 JANUARY, 1924 WORLD WIDE the our been received from the Bowdoin, ice- Development of "From those across sea- winter, International blood and tongue-have bound for the long Arctic kinsmen by that this adventurous Radio Week come your own statesmen in recent which inform by this same genii, party are keeping in the best of spirits NATIONAL RADIO WEEK, No- months, and served of voices have reached mil- very largely through the agency vember 25th to December 1st, was Radio, their that they are hear- of our people. radio. They report a week of memorable events. lions in England, Germany, splendid "And now, scarcely before we have ing stations In order to live up to the Holland, Mexico, France, Norway, press of the been able to grasp and assimilate the co-operation from the are in- Italy, Japan and Spain, that they are make that event the biggest, tremendous import of it all, we country to British cousins getting each evening the news of the recent celebration on the air, programs vited to speak to our Eng- the weary stretches of three world from stations in Oxford, were arranged to present the 'breadth across Nauen, Germany, and that enter- thousand miles of the intervening land and of possibilities in home radio operator on the MacMillan ship has the social Atlantic. the tainment and to promote actually talked with 6CEU in Hawaii, by means of this As my voice reaches the spirit that is possible memory over a distance of 5,000 miles. as well as informal mode of people of England tonight, my universal and unfailing communication. pictures the great service that our American soldiers Among the notable achievements of hospitality the week was the trans -oceanic broad- Germans Radio to Moving cast station tests, organized and con- ducted by Radio Broadcast, the British Trains Broadcasting Company and the Wire- Review (Lon- recently had a demon- less World and Radio GERMANYstration of wireless telephonic don). communication between a moving train Of the most prominent speakers in and ordinary receiving and transmit- this country were Owen D. Young, ting stations, according to U. S. Consul Chairman of the Boards of Directors Richardson, at Berlin. Messages were of the General Electric Company and exchanged between the President and the Radio Corporation of America, officials of the government in Berlin General James G. Harbord, President and other officials on a train, moving at of the Radio Corporation, Henry Ford 30 miles an hour, half way between and Charles Evans Hughes. Berlin and Hamburg. The "Huth" Co-operation of amateurs, ship and system, which is a combination of wire- shore operators, broadcasters and radio less and wire transmission, was used. executives undoubtedly made the tests The sending apparatus was installed in a success. Because of the difference a compartment on the train and the in time between England and America antenna rigged over the tops of two extreme care was necessary to assure cars. The line telegraph wires along "open air" and as well a convenient the track are said to have picked up the period when darkness prevailed sim- messages and transmitted them to Ber- ultaneously in both countries. lin, where the line was connected with stations were received a receiving set. The British HIRAM PERCY MAXIM as far north as Nova Scotia, as far Relay President of the American Radio south as Texas and as far west as League, caught England's "Hello, America" Davenport, Iowa, and scattered points in North Dakota. Altogether, 18 received at your hands, while on their Radio Traffic Illustrated provinces states in this country and two way to France . . . in Canada are represented in the re- "Our nations are closely cemented 'URING the course of his interest- ports of successful reception. unity of a democratic purpose, ing address at the Boston City by the appli- the reception of Amer- the same high ideals and by a com- Club recently, dealing with the In England by communication to ships ican broadcast stations was generally mon language. Let us hope that this cation of radio than the British sta- change of thought by voice across at sea, Mr. David Sarnoff gave a prac- more successful first how effective heard on this side because our the broad Atlantic will serve to tical demonstration of tions in signaling to distant stations used more power for trans- strengthen our existing friendship in radio has become mitting. permanent bonds of understanding. vessels. G. Harbord's address, "The programs of this National For this experiment, the telegraphic General James the first an incident of National Radio Week Radio Week have constituted controls of the high power marine speech of the inter- attempt to reach you through organized radio station at Chatham, Mass., were and the concluding your ac- national broadcast tests, contained broadcasting, and to receive linked by land wires to telegraph in- to the British knowledgments through your own struments on the speaker's platform. America's message is listeners. broadcasting stations. Surely radio Thus Mr. Sarnoff was able by the broadcast tie and more before Harbord opened his address the harbinger of a closer operation of the instruments General understanding among the na- him to reach out to the extremities of with a comment on the marvel of talk- thorough of the Old and New tions of the earth." the North Atlantic and communicate ing to people no radio range of without having to raise his International broadcasting is now with all vessels within Worlds but a fact. the Chatham Station. voice above conversational tones. longer an idle dream, he said, "Leaders of Mr. Sarnoff stepped to the sending Continuing, the political thought, culture, science and MacMillan Arctic Expedition key on the table before him and by enabled to address millions mere tapping of the key, he literally the arts are the station of Jack of their countrymen in all walks of life, THROUGH swept the ocean with radio waves laden rival- Barnsley, amateur operator, at country, with an ease : in city and B. C., messages have with this message ing the intimacy of the telephone. Prince Rupert, 44 THE WIRELESS AGE JANUARY, 1924 "Two thousand members and Radio Autos guests of Boston City Club now Touring France An Uncanny Coincidence assembled in Boston intensely magazine By J. O. SMITH in- THE "Je Sais Tout" (I RADIO terested in special marine radio Know Everything) of Paris has is credited with many strange demonstratiton and would greatly started a radio -equipped automobile and weird performances and many are the tales appreciate courtesy of your ad- caravan on a tour of France. The ex- that have been told of vising quickly approximate dis- pedition consists of three strange happenings in radio operation automobiles, that tance from Boston and present under the direction of the could not be readily accounted for, engineer but it weather conditions, thanks, Guineau of the Ministry of Public In- is doubtful if anything more strange, in fact uncanny, DAVID SARNOFF, struction, two of which carry a com- has ever oc- plete transmitter curred than was true during the Vice -President and while the third is time General equipped with receiving all radio traffic and seacoast broadcast- Manager, Radio Corp. of America." apparatus. At ing was each town at which a stop is made, stopped on the night of No- the vember 29th Replies to the message were received transmitter broadcasts a concert of because of an SOS from. from vessels almost instantly speeches and music, the SS. Henry Farnum, Call KQA. and as which is repro- ashore replies were received the position duced through the loud off the Florida coast. of speakers of the The these vessels on the high seas receiving automobile, which Farnunt first broadcasted an was in- also on oc- SOS about dicated on a chart of the world which casion picks up concerts from Paris. 9:00 P. M. which was had been provided on first picked up by two other steamships, the platform, Each automobile from the exterior the with the radio station at KDCB and the WAX. These Chatham seems like any ordinary limousine, but ships plainly indicated. immediately rebroadcasted the SOS of the Farmii n and the navy yard stations 4 along the coast immedi- ately Radio in French Trains ordered complete cessation of all ship time ago experiments -shore traffic. Broadcasting sta- SOME with tions along radio on moving trains gave little the coast were also ordered hope of ultimate to stop transmission. success, but only re- Through cently new attempts have shown this blanket of practically the m. absolute entire feasibility of the idea. silence could be heard the After Nancy spark long and patient research signals of the WAX as com- new trials St,asbc munication were conducted recently on the Bor- Rrnno was carried on with the deaux to Paris train, Farnum. The WAX was evidently while it was be- not hearing tween Tours and Paris, with encour- the KQA well and could aging results. BourSes be heard repeating back parts of a long The travelers were able received to hear with ease message for verification, one and clarity both the section concerts from the Radiola station of which was to the effect that and the Farnum "was the news announcements of the Eiffel aground five miles Tower. from -" A few minutes afterward The receiving set used four stages the voice of the announcer of broadcasting sta- of radio frequency and one of audio, tion and KSD at St. Louis on 546 meters was contained in a cabinet pro- and close vided to the wave length of the with rubber shock absorbers. WAX boomed Four loud speakers out of the loud speaker were used, two in N to the each effect that "The ship ran aground end of the car. and was destroyed." The antenna problem was solved by It was only part of the announce- the use of three wires, each 20 meters ment of the next number to be broad- (66 feet) long stretched inside the casted, a descriptive one, car. This by a sym- meant that the antenna nec- phony orchestra at the Odeon, essarily was low, St. but the line of the ßareetop Louis, but it caused many a gasp railroad is generally of high and seemed Map showing route of wonder and surprise from to compensate radio autos those listen- for the lowness of the ing to this Thanksgiving night tragedy antenna. The ground consisted of an of the sea. It was insulated just another of the wire stretched under the its equipment is anything but ordinary. strange happenings which sometimes wooden steps that run the entire length The transmitter has 250 watts power, occur in radio operation and certainly of the car. In earlier tests an attempt and works on 400 meters. An itinerary was uncanny although understandable. was made to ground the receiver di- covering 8,000 kilometers (4,800 rectly miles) on the trucks of the car, but in in three and a half months has been Amundsen's Ship the latest Heard From test this was not tried, the laid out, taking the expedition not only by Radio wire just described giving complete throughout France, but also satisfaction. touching in December, Captain Raold Belgium, Luxembourg, Switzerland EARLYAmundsen's and Spain. exploration ship. Maud established radio communication This is the first effort of Cuban Broadcasting Stations the kind in with Spitzbergen. The ship's position Europe, and is expected to add boasts great- was given as 75.10 latitude of twenty-seven radio- ly to the popularity of the radio north. CUBAphone broadcasting tele- 159.30 longitude east. This is north stations, of phone in France and neighboring coun- of which six are rated Siberia near the route taken by De at 500 watts. Four tries. Collections taken up at each stop other stations have an Long in 1881. The Maud left Seattle output of 100 will be added to those realized during in June, watts. The principal stations 1922, carrying Capt. Amund- are the celebration at the Trocadero, Paris, sen and PWX, the Cuban Telephone Company; several an exploration party, but months ago, for the establish- Amundsen later left 6KW, Frank H. Jones ; the vessel to make 2CX, Freder- ment of a foundation for rewarding preparations ick W. Borton, and 6DW, inventors for his airplane flight Eduardo of important radio improve- across the Terry. ments. North Pole, which he subse- quently postponed until next summer. WIRELESS 45 JANUARY, 1924 WORLD WIDE Stone-among the first to use the loop Broadcasting in Sweden for direction finding in this country, the RESPONDING to the request of there is a general impression that industrial firms, the Navy is the pioneer and authority on numerous research and Swedish government has just author- this branch of radio ized the formation of a broadcasting practice. Rundradiobolaget, the It is only common justice to call at- company, the Radio which are representatives of tention to the fact that the owners of the subject of Swedish newspapers and metallurgical Beacon System has been has been . Ten broadcasting stations are attack and its development firms. propaganda, to be erected, to cover the entire king- hindered by widespread stations will be at such as meets all successful rivals of dom. The principal sys- Stockholm, Göteborg, Malmo and Ore- well -established conventionalized will have a power of 1 kw. tems. bro. Each other The Swedish government will have full My correspondent among : prob- control of the stations, and authorized things, makes this point "The the funda- the program of construction only after lem you treat of is one of the possibilities, and con- mentals of piloting. It is known as the investigating can be cluding that broadcasting would com- `three point problem' and of the people to flock plotted with a three-arm protractor bat the tendency of into the large cities, and also would JOHN L. REINARTZ with a great deal less expenditure Daddy of Reinartz Circuit method strengthen the family by making the time and energy than by the To this I would re- home more attractive. sets in you describe." there are approximately 25,000 I am quite well aware of the comparison mark that the Argentine Republic, in which I used in 1897, but find less than one method, Broadcasting in Panama with approximately 100, that the use of a double protractor - for broadcasting en- year ago. compass arrangement-which was not: and the ar- PERMISSIONtertainment programs has been giv- described-is just as quick, about one-third of the en by the U. S. Navy to the radio Listens In Before rangement costs Denmark standard "three - stations in the Panama Canal Zone, -Crow price asked for the America soon Cock arm" arrangement. It is also lighter. and that part of tropical radio amateurs its share of radio telephone The use of scale and compass work will hear ENTHUSIASTICDenmark are always endeavor- programs. For the time being it is in was recommended for those whose will be ing to catch broadcasting from the would bring likely that all such programs coun- knowledge of geometry Navy stations, as United States, even though this more clearly. It transmitted by the more unfavor- out the principles is in complete con- try lies in a somewhat than 30 seconds to locate the the United States American radio takes less radio work not only in the able position to receive ship when the base angles are known. trol of all than other European coun- Canal Zone, but in the Republic of messages Again my correspondent says : "The Panama, by agreement with the latter. tries. shore compass stations are used by the Leading Panamanians are understood Navy indeed, but you did not mention to have appealed for a loosening of the Radio Beacon that every Naval vessel is equipped Canada Plans too. After years of restrictions to permit broadcasting. is about with a compass, Canadian Government both systems, the THE direction -find- experiment with to install a powerful Navy believes the shore stations to be station at Pachena, on the Broadcasting in Chile ing wireless the more accurate. It almost stands to coast of Vancouver Island, Brit- Valparaiso, and several west reason." To this I would say, the Santiago, ish Columbia, to protect ships of all INsmaller Chilean cities, interest in ra- latest technique of the Radio Beacon nations entering the Straits of Juan whatever. dio telephony is growing steadily and Ca- System requires no compass de Fuca en route to American and a compass its fuller development only awaits the shipwrecks It is superfluous to mention station nadian ports. Numerous and I purposely re- establishment of a broadcasting district, and it is in this connection now have occurred in this from doing so. within the country such as those the new radio beacon frained of South expected that con- in operation on the east coast to determine their In spite of some opinions to the Trade will enable vessels of per- America, says Assistant U. S. in foggy weather, trary, the undeniable advantage in a re- exact positions is pecu- Commissioner W. E. Embry many dangerous reefs there- mitting continuous readings of Commerce. avoiding Beacon System. Any port to the Department abouts. liar to the Radio It is reported that the broadcasting fairminded observer who has noted stations recently erected in Buenos the relatively slow process used-for Aires, Montevideo, and Rio de Janeiro Further about Radio Beacons example-at the N. Y. City charting satisfactory results no doubt whatever on have given very By OSCAR C. Roos, M. E. rooms, will have large numbers of amateur receiv- point. and THE WIRELESS AGE. this ing sets have been sold in these coun- Editor, What hard-headed business man- N. Y. City. tries. This is especially true of the agers think of the Radio Beacon Sys- where conditions for broad- Dear Sir : is indicated by its adoption en Argentine intrude on your valuable tem casting programs are almost ideal as May I Oil tankers. It was de- in order to present to the readers Standard the land generally is flat and radio space veloped by engineers who demon- River of my article on "Radio Beacons" transmission carries all over the Age), strated radio direction finding to the Uruguay, and into south- (page 47, October Wireless Plate district, thereof and my reply Navy in 1908. ern Brazil on the north and as far as some criticism To deprecate it is to call public at- Andes on the east. For this rea- thereto ? its merits. the this matter to your atten- tion to son, the sale of radio equipment has I submit Very truly yours, success in the tion because in spite of the fact that met with the greatest was-with John O. C. Roos. country and it is now estimated that Dr. G. W. Pickard V4 .V4 V4 V4 4V4 J tVj IJIJ6l%! WJIIJl1t1VlJ11JJV/JJJI /Jl /JV./JLIIJI!JJI I!/JIJI !/Jll%Jl>JJCVJCIIJIVJIV lI .JI The Monthly Service Bulletin of the NATIONAL AMATEUR WIRELESS ASSOCIATION Guglielmo Marconi President H. L. Welker Secretary Founded to promote the best interest of radio communication among wireless amateurs in America NATIONAL ADVISORY BOARD OF VICE-PRESIDENTS Mai. Gen. George O. Sqquier Chief Signal Officer, U. S. Army Prof. Alfred N. Goldsmith Prof. A. E. Kennelly College of the City of New York Harvard University E. E. Bucher Instructing Engineer HEADQUARTERS: 326 BROADWAY, NEW YORK .l1f%iI'11 i1Ube1fYi11ArA1fYi11fYil1fYi11Aí 11tYi11(íIYYîIUYiI'1iYi11fellfYQ1fYeM11YA11í1A i1fYi1fYíclNOtYi lYil1AedltedYe1Ai r tnl tnt In The Milwaukee Radio Ama- Amateurs In Continental Eu- Hears teurs' Club, Across Continent on Inc. rope to Be Our Playmates One Tube M. R. A. C.'s technical com- THEmittee investigating American Radio Relay League DONALD S. REINHARDT, a fifteen - and reporting TElE year -old fan at meetings is now expects co-operation from who lives in Llanerch, Pa., the largest and most the recently tuned in KFI, active in American amateurs during the Los Angeles, Cal., the society. Mr. Doll is Trans - while using only a detector tube. chairman. Atlantic tests, December 22, 1923, to "Shortly after the storm had let up," he Reports such as, "The Relative January 10, 1924, in an effort to pro- said, "I started to tune mote in on two tubes, but Efficiencies of Battery -Charger Recti- better amateur communication that made the static too loud, so I cut down fiers," and, "The Remotely Controlled between America and Europe. to the detector tube. I tuned in about eleven System of Station 9AAP," are typical To facilitate receiving at this end stations, including Chicago, Davenport and of this committee's work. the French and Kansas City, and then I decided to begin all, British amateurs will over again. A notable example of the addresses transmit on alternate nights, the trans- "I turned the condenser given before the society is, "Magnetism mission hours from dial to zero and 8:00 P. M. until gradually advanced it toward the 100 and Some Original Experiments in 1:00 A. M., -degree its Eastern Standard mark. The first station that came in was Manifestation," by Rev. John B. Time, the French starting the one at Knoxville, Tenn., Kremer, which was signing professor of physics and di- tests on December 22. Since off. I moved the condenser a trifle more rector of station WJAZ, Marquette the efficiency of our amateur and caught a faint carrier wave I tuned it University. In conjunction with this a transmitters was adequately proved in and increased the volume by means of contest the plate variometer in defining technical terms was last winter , there is no reason why and heard orchestra also popular. our fans, however enthusiastic, music. A recent membership drive under should "break-in" during the twenty "In a few moments the music stopped the leadership and I waited for the announcer. He said of F. W..Catel, 9DTK, days of testing. 'The was very successful. large next and final selection will be Bebe.' A number By way of special inducement The orchestra played of Milwaukee County non-member to it with a man singing insure "quiet air," $3,500 worth the words of the chorus. Again the an- amateurs were induced to of join the club prizes are to be awarded for nouncer spoke and this time he said, 'This and the American Radio the best Relay League reception reports turned into Amer- is Station KFI, Los Angeles, Calif., signing of which this society is a local section. ican Radio Relay off. Good evening, every one.'" The League Head- had traffic committee solicits reports quarters, 1045 Main Street, Hartford, "I the station between 11:30 and 12 of QRM for investigation. All com- Conn. o'clock and there can be no mistake about munications to the club should be ad- it as the words were plainly heard. dressed to its general office, 601 Enter- prise Bldg., Milwaukee, Wis., or its officers may be interviewed at the weekly meetings which are open to the public. Romance for Editors ETTERS from distant lands come in sounding the far -away call of the inevitable amateur, and lack of space, alone, prevents our publishing them in full. From Grahamstown, Africa, S. W. Watson reports his reception of Amer- ican broadcasting, saying that amateurs in Cape Town have recently heard music and speeches in a foreign lan- guage. J. Bishop of Norfolk, England, writes that he has heard WGY and other OFFICIALS OF THE AMERICAN RADIO RELAY LEAGUE American stations with only four Seated, left to right: A. A. Herbert, K. B. Warner, F. H. Schnell. Standing: C. A. Service, Jr., tubes and an indoor aerial, two stages J. K. Bolles, E. C. Adams, F. C. Beekley, S. Kruse and F. H. Mason of radio frequency and one audio. 46 iu/ u a%jj,/ ï #í-, Laughter on the Radio Wave VAcvUM, GLUT 1 J. MISERY, ( MR. Joe tF.c+ [-MRTHE FAMoVS PAIN) \ POPULAR NUT, WILL Now) e EXPERT, WILL NOW OFF I CER, GIVE A TWO- 4oLl FLOOR l3 ALW4es LrJ HERE? S TALK ON LOWER THAl.1 ° boE.s 1 STrcV fl ? \A MAIS SUFFER MUCH GEIL1NGn 4-es ßET1 *1HEA1 ME OREAKs GolvE FROrt H1S NECK?' -n -us 500ARE / FoR n>eARLY Awe-EK ____4, A NNAEELLE Joy" wHILE,WHEN LUC( Jrô ANNABELLE Joy WHILE Lucy- B. SADD, QUITE. ANXIOUS HER WAS DE SAND MADE PIDDLE A lo-r, WHEN AT LAST sHe To Ger HAD To TUNED IN, RADIO HUM, AND HERE lS THE .3CMETHING FUNNY SHE JUS' LU A NT6b GOT The soRT OF A AI.D LIGHT ON HER THE STUFF THAT fl.0 JG THA-ç SHE N OMESE.R THAT'S 2ÁD10 se-T," WAS HEAVY AND FINALLY Gam, $UILZ FOR A.GRIN . GLVM: N. Y. Evening Mail Bulbs Ain't It Grand? Switches By JACK BRONT of metal, may be made of glass, rub- may be made BULBS The "Come, dear, dinner is getting cold SWITCHES and hair. The use of ber, or vegetable matter. green wood, are subjects and it's Nora's night out." but fundamentally all bulbs of vegetable matter each is different, commuters and "Mm -m." with electricity. Metal switches of deep interest to ?" deal are planted in the ! Are you coming. electricity shall florists. They "John decide in which wires flowers a min-" turning the knobs. wood switches ground and produce beautiful "Just flow, if any. Green weather, "Oh, that old radio set" sensation of electricity in in due course of nature, the generate a animals and visit- Silence. hide of the small boy to which they insects, herbivorous the and thickens permitting. "JOHN! Do you hear me?" are applied. Hair switches are almost ing dogs, cats Abstractedly- "Just as plain- but their theory is based on Rubber bulbs are attached to vari- obsolete as WJZ! -er WHAT, dear?" the production of electric impulses in ous instruments of torture such of that and "I suppose you think more the eye, spinal column and other parts atomizers for dispensing perfume me." soul. In old radio set than you do of of the beholder, generating an irresisti- other medicine for body and ! were also "Yes ! Yes !-It IS KDKA -Com- possibly of a magnetic former times, rubber bulbs ble attraction, of horn ing, dear." character. Metal switches are fre- essential to a certain type to leave this to make more "Brute ! I'm going quently found in the home, while green which was supposed house forever. You want me to go ?" flourish in the wood- noise than the automobile to which it all wood switches "Of course !-It is KDKA shed. Hair switches wave in beauty was attached, or than the pedestrian right !" and other parlors, and are worn by the at which it was honked. "I'm going to pack this minute !" owner during her public appearances. Glass bulbs have much less in them "Hooray !-Here's WEAF !-Sure, They sleep on the bureau at night. than other kinds, but much more comes Jane. Er -er What were you saying?" the wood switches give pain, them. Some glass bulbs pro- lid Only out of Sobbing from above as the trunk though sometimes the after effects of duce light to shine upon the pathway. slams shut, ready for departure. hair switches may not be pleasant. Others are more dim but possess the "Oh, Jane! I've got Wanamaker's, are progressive citizens, ability oftransmitting or you? Metal switches marvelous WANAMAKER'S! Where are illuminating the home, lighting the receiving man's speech and music Jane !" dark places of earth, turning the across untold miles of space without Silence and sobs from above. of industry and commerce, and, aid of wires. These are the most got the wheels the "Oh, Jane ! Wanamaker's when used in radio apparatus, enter- expensive and important bulbs of all. ! Styles greatest style show of the store taining and educating millions. When just in from Paris !" a switch of this kind is used it is cus- Tremulously-"Y-y-yes ?" said to be "thrown," but there The radio storm created by WGY, and pick tomarily "YEAH ! Let's go down is no "bull" about this. in the production of "Peg o' My Heart" out that wrap you wanted." as a radio drama, was so realistic, ac- "Well-" reluctantly. cording to Martin L. Wyman, Jr., of "Just fine, eh, old girl?" Vt., that his father took off and One of the advantages of radio ora- Gaysville, "Uh -um ! You're a dear John, saying that he didn't tory is that the speaker never knows his headphones, isn't that radio just grand?" care to listen in during a thunderstorm. "I'LL say so. (Gr -r -r -r)." when he is hissed. 47 The Wireless Age P receiver By John R. Meagher To Mr. Lee Galvin of the RCA belongs all credit Galvin for originating the "Push Button Receiver." wished to give as a present to a friend a radio Mr. tive in operation. receiving set that would be simple and posi- So he set about to devise such a receiver-and and text describe he succeeded! The photographs one adaptation of his system.-J. R. M. MAGINE a three -circuit regenera- j diameter, tive receiver without variable con- 6" long and 1/16" thick must ERE is a receiver that be trols ! is drilled for mounting screw holes 'way ahead Imagine a three -circuit regenerative of the gaine! (No. 27 drill), slider supporting screw receiver that doesn't With it, it is possible to holes (No. 27 drill) and wire fasten- re -radiate ! select any Imagine a complicated one of three stations by ing holes (No. 60 drill). All of these three -circuit merely pushing a receiver that a child can operate! button-that's are shown in the sketches, figures 3 Imagine all! and 4. a receiver so designed that It pushing is an ideal set for real en- Note one button lights the filaments, joyable entertainment-no that a space of /" is provided selects the proper wave me- between the coils in -length and the chanical or electrical order that the proper regenerative adjustment skill what- separate leads may be distinguished for a soever is required in its certain opera- more readily : station; another button for a tion. Because of the slider second station and a third button rod supports, /" is allowed between for And it's east' to make-and still another station ! the antenna inductance and the spaced That's cheap, too. portion what THE WIRELESS AGE * * * * of the secondary. "Push -Button" * * receiver ! does We see the time In winding, leave about 6" for leads It's a standard ze'hen receivers three -circuit regen- like this, in locked and secure the ends of the coils by erative receiver modified cabinets will as shown in be rented to subscribers threading the wire in its fastening the circuit diagram, figure or holes. I. equipped with nickel -in Wind the tickler first and then Coupling between the plate, -the -slot grid and devices for public use. (in the sarne direction) the untapped antenna inductances is fixed. Three section of the secondary and THE EDITORS. the an- sliders on a portion of the secondary tenna inductance. The spaced portion find the proper value of inductance of the secondary to is very easy to wind ; "tune in" any three stations. Three secure the end of the cord and variable wire resistances in series with the in the fastening holes, and make sure sliders serve to adjust the degree of that both the cord and wire are regeneration free and the output volume. to unwind (either by arranging the Three simple switches are used to se- spools on an axle or by laying both lect any one of the three slider -resis- cord and wire full length along the tance circuits and at the same time floor). Lay them on the form side complete the filament battery circuit. by side and turn the form with That's one all there is to it ! hand, guiding the wire and supplying the necessary tension THE CIRCUIT with the other hand. When' the entire winding space Figure 1 shows the complete tuning of 3" has been utilized, cut the wire circuit and figure 6 represents the and cord and fasten the special home-made ends in the inductance. All holes. No connection is made to this coils are wound on one form; the end of the wire. The ends of the secondary that are separated by the antenna coil should be soldered and after the three sliders and rods have been arranged in place there should remain eight connections ; two for the "tickler"; one for the grid; one for the ground; one for the an- A child can operate it tenna and the three sliders for the fila- tickler ment. And take care in arranging of 40 turns at one end, then a the portion of sliders that the contact makes con- the secondary -40 turns, nection with next the untuned antenna but one turn at a time coil -15 and that it has sufficient turns and finally a spaced "spring" to winding insure positive connection. forming the remainder of the secon- dary. Three sliders are arranged over this section which is wound with bare wire, No. 22, spaced with thin fishing cord. The dectector and amplifier are of standard design; in order to simplify the construction, no rheostats or jacks are used. Figure 6. The complete tuning unit is shown here. Coupling between the three circuits is fixed and sliders are used to vary the in- THE TUNING UNIT ductance of the secondary The winding form The nerve center of the entire receiver; this of bakelite, 3" is the push-button strip 4S 49 JANUARY, 1924 PUSH-BUTTON RECEIVER unit in an able for fully mounted audio frequency Seven connectors, consisting of brass After "drying out" the arranged of collodion may transformers. machine screws and nuts are open oveti a light coat unit. Flex- cotton covered wind- together all the parts and in the panel near the tuning be applied to the Gather the unit are not to the spaced section of arrange them on the panel in the best ible connections from ings, but and they are wired secondary as the fishing cord is manner. Then mark and drill the soldered to them the the rest of the circuit. already water -proofed. holes. underneath to away until the detector connections to the sockets Screw the push-button strip in place Put the form Note that receiver, using bus and push-button sections brought through the panel and in and wire the entire and amplifier are copper covered have been made. this way wiring is restricted to the bar and soft drawn under surface. This is done by re- with small black cambric tubing. THE PUSH-BUTTON STRIP placing the terminals with longer brass Finally, attach the tuning unit to This is the "nerve center" of the screws (/", 6/32) which will ex- the panel with small brass machine entire receiver for it is the only vis- tend through the socket and panel. screws and nuts and solder the leads ible means of "wavelength" selection Small 6/32 hexagon brass nuts are to the proper terminals. and also automatically selects the re - used to clamp the contact springs in The receiver should be placed in a .generative adjustment and opens and place and the spring, nut and screw cabinet which may have a polished :closes the filament battery circuit. In wood front-only the three push but- addition, it is the easiest part to make ! tons will show. Small card holders The strip is of bakelite (though hard should be arranged above each button MATERIAL and an appropriate card containing the wood would be satisfactory) /" name of the parts used is The trade or call letters of the station in- wide, 6" long and / thick. It in the "Push Button" receiver are name drilled (figure 5) for three Cutler- given in parentheses; however, one serted in each one. Incidentally, the Hammer battery switches which are should not hesitate to choose other cabinet should be provided with a long sides parallel. makes if they are of equal merit. hinged top as it is necessary to get at arranged with the 3 (Paragon). the standard sockets. the "works" when the receiver is in- The dust -proof fibre casings on 3 battery switches. (Cutler -Ham- switches are removed and the three mer) stalled. bridging "U" shaped shorts are con- 2 audio frequency transformers. OPERATION and to the metal (General Radio) nected to each other 3 400-ohm potentiometers. (Tilman) LTV -201A (C301 -A) tubes are . is frames with flexible leads. (This 7 binding posts. (Eby) used throughout so a storage battery connection 5 in figure 1.) The three 1 sub panel, 7"x14"x3/16". (Radion) of 6 volts with a six -ohm rheostat in 1 (Bake- lower terminals of the switches are switch strip, 11/2"x6"x1/4". one lead should be connected to the with a bus bar. lite) receiver. connected together 1 mfd. grid condenser. (Du- A battery binding posts on the 1.) .00025 (This is connection 4 in figure bilier) Connect the B battery, loud -speaker, There remain three separate contacts, 1 1-megohm grid leak. (Radio Cor- antenna and ground to the proper one on each switch to which the sliders poration) 1 (Du- binding post. are connected (fig- .0005 mfd. fixed condenser. and potentiometers bilier) Set all three levers so no resistance ere 1). 1 inductance, form 3"x6", % lb. in with the sliders and the No. 30 D. C. C. wire, % lb. No. is series THE DETECTOR AND AMPLIFIER 22 bare soft drawn copper, spool filament. If it is desirable the detector and of thin fishing cord, 3 sliders Then, with one Cutler -Hammer and three 4" slider rods. .amplifier may be mounted in a sep- switch "out" vary the slider connected 4 strips of bus bar. wave" arate cabinet; any detector and two - 2 strips of black cambric tubing. to that switch until the "carrier stage amplifier may be used if con- of a station is heard. Leave the slider nections for a "tickler" are provided. there and increase the resistance of in order to make the en- the "potentiometer" connected to that However, loos - compact, both the tuning are soldered together to prevent slider until the whistle ceases and the tire receiver insure a perfect connec- in- unit and tube section should be laid ening and to broadcasting is audible. Further will decrease out on a base of hard rubber or wood tion. crease of the resistance so the desired in the manner of the receiver illus- Four holes, identical with those in the signal strength This panel is only 7 by 10 the socket are drilled in the panel and volume may be secured by manipulat- trated. readjusting the inches, but a larger one is specified in the projecting screws go through them ing that control. Try order that plenty of room will be avail- and are clamped with other hexagon slider a turn or so and leave it in the brass nuts. These serve not only for best position. connections, but also as a means of Push in that button and the fila- fastening. ments will "go out." Pull out one of .00/ 24 3. Ou/ 4 S. 0 0 ® 0 +A -A Tap B +3 B Ground used in the push -but - Figures 1 and 2. Note the remarkable simplicity of the circuit ton receiver. As may be noted in Figu re 1, three switches are so arranged that they may cut in separately a certain amount of resistance and a certain value of inductance for a certain wavelength. In addition the filament circuit is made or broken by the action of the switches. Complete details about this unique system are given in the text 50 THE WIRELESS AGE J.\\ LIAR Y, 1924 the other buttons ; the filaments will tion and adjust the signal volume. amount of regeneration again light; desired. and proceed to tune in In other words, all we do is to ad- Having calibrated all three "but- some other station-preferably a just one slider and one resistance at tons" so as to receive the three best local. Adjust the volume as before. a time, the slider determining the stations, shut up the cabinet, lock it if In a similar manner, select a third sta- wavelength and resistance the the necessary, and that's all ! The Push-Button Receiver is the second of a series of sets made in THE WIRELESS AGE workshop and described in detail in THE WIRELESS AGE. We have many splendid receivers in the process of construction; all of them are of the latest type; some have unique features which make them not only efficient but also new and interesting. To mention a few. (Rile is a one - tube reflex that is just about the best one -tube set that has as yet been described; another is a more complicated tuned radio frequency amplifying receiver that is capable of exceptionally long distance reception; there is a splendid super- heterodyne, too, that is cheap and easy to make. All of these and a wealth of technical constructional articles are planned for near issues of THE WIRELESS AGE. The Push -Button Receiver is on display in The Wireless Age office at 326 Broadway, New York City. Come in and examine it when you are in the city. w27-_ 0 7,1444 4IHle 41- ; 41 bf 40- -eri O N -e- irmifflogibrI ._ mu 114 111L3h /n __J Aerial Binding Dost 2 g 2 /6 2' 32 4' Fiq. 3 fig. 4 Dill and tap in edge *6.32------, Figures 3 and 4 above. These sketches represent the winding Figure 5. Panel layout of the form for the tuning unit push-button strip 2" -I - 2" .I /" Fig. 5 The inside works of The Wireless Age push-button receiver; the left hand view shows the sub -panel with the tuned unit and push-button strip in place. The knobs control the amount of resistance in the circuit. A bottom view is shown on the right-hand side and one may note the simplicity of the wiring Radio Frequency Amplification, Regener- ation, and the Single Circuit Receiver By Donald Gordon Ward Associate Member Institute of Radio Engineers a number unknown point the This article is the result of FROM some with standard appara- idea has been gradually seeping of experiments fraternity that it tus at the Radio Institute of America, into the amateur a considerable to employ radio frequency which extended over is impossible is very convinc- with regeneration and length of time and amplification were pro- impossible to employ radio ing as to the results which especially Various types of signal energy frequency amplification with the single duced. Just where this idea were received, such as the radio fre- circuit receiver. wave - one seems to know, but quency from a buzzer driven originated, no from a distant spark be supposed that it was because meter, signals it is to signals from a distant some experimenter who had very little transmitter, frequency ampli- C.W. transmitter, and signals from a experience with radio using to apply one of the orig- small C.W. calibrated oscillator fication tried A.C. and D.C. as the source of inal type of radio frequency circuits both receiver, and not supply of the plate potential. to his regenerative The following apparatus was em- being able to accomplish anything in results, he immediately ployed in making the tests. the way of RCA short wave loop the conclusion that it was impos- One standard drew type AG -1380 with variable condenser. sible to employ radio frequency ampli- 3 radio frequency amplifier, fication with any type of regenerative One -stage General Electric Co., AA -1520. One receiver. Westinghouse RC receiver, complete The first statement to be made in with tuner, detector and 2 stages of is this Figure 1. Some of the apparatus used in the connection with this article that first experiment which the author conducted audio frequency amplification. One is and one which should be to learn if radio frequency amplification could idea false be used to advantage with a regenerative General Electric single circuit tuner, immediately dispensed with before it receiver type AA -1300. One General Electric does any more harm to the radio game. detector and 2 -stage audio frequency Another false impression which has During the process of the unfolding amplifier, type AR -1400. One single - been held by many radio experi- of this article we will not only show circuit Armstrong regenerative re- menters, is that it is impossible to use how to employ regeneration with the ceiver employing the Reinartz circuit. radio frequency with the single circuit radio frequency amplifier and how to The first set-up used is illustrated in receiver. The time and place of birth use radio frequency amplification with the figure 1. The apparatus used was of this idea is also rather vague, but it the single circuit receiver, but we will as follows, Radio Corporation loop with variable condenser, type AG -1380, probably also came from - the same also demonstrate the use of radio fre- fre- source that was responsible for the first quency amplification, regeneration and General Electric, 3 -stage radio -1520 and erroneous idea concerning regeneration the single circuit receiver, at one and quency amplifier, type AA and the radio frequency amplifier. the same time. Westinghouse RC receiver. T T T J mid. +o A -o b- i+ B +B Oef Amp II.005mfd shown above Figure 2. This is a circuit diagram representing the hook-up of the equipment 51 52 THE WIRELESS AGE JANUARY, 1924 The radio frequency waves were far as signal reception and freedom circuit around the tickler coil, if one picked up by the loop and converted from extraneous noises are concerned. into radio was put on, and adjust the tickler coil frequency currents in the The circuit should be adjusted by until the loop and condenser circuit again oscillates as will which formed the means of the stabilizing potentiometer, be shown first oscillating circuit. by making the same test for The output of until, with the tickler coil adjusted to oscillation as this circuit was fed through was made before. The the three the minimum position, it does not os- circuit is now ready to stages of radio frequency amplifica- be tuned. cillate. If it is found that the signals tion and thence to the tuner of the RC The from best test for oscillation is to tap the local stations come into the loop receiver and from there to the detector, the antenna post of the radio frequency with such an intensity that it is difficult where it was rectified in the usual man- amplifier, which under the conditions to separate the stations one from an- ner and then passed on to the audio of this test is the input post of the radio frequency other, the number of stages of radio amplifiers. The circuit frequency amplifier, marked G, or in frequency figure 2, gives which are being used may the complete wiring dia- some cases the unmarked terminal. If be reduced gram of this connection. by simply turning out the a click is heard in the telephones when filaments of the radio In operating this circuit frequency ampli- it must be this test is made, the circuit is in an fiers. If only two stages very carefully adjusted so of radio fre- that the oscillating condition and the stabilizing quency are desired simply radio frequency amplifier does turn out the not os- potentiometer should be adjusted until filament of the third stage radio cillate, for if two radio frequency sig- fre- this is no longer heard. If it is found quency amplifier. If only one stage nals are locally generated, one by the impossible is to so adjust the potenti - desired, turn out the filaments of the Ant Grid o I } Gnd. e,. Transf. R . Tick/er to Radio Fre- to Radio quency Frequency Tick/er Amplifier Amplifier- Tickler Fig. 3 Fiq. S Fig. 6 Various tuning systems may be used in conjunction with the radio frequency amplifier radio frequency amplifier, and the ometer to prevent this oscillating con- second and third stages, other by the regenerative receiver, but do not and dition, it is due to the fact that the under any conditions remove a third radio frequency is picked the tubes up by tickler coil is causing the oscillation, so from the sockets as this the aerial, a very curious conglomera- will cut out it should be temporarily short-cir- the signals entirely. With the filaments, tion of sounds in the receivers will be cuited. The adjustment of the stabiliz- turned out and the tubes in the the result. This is taken care of by ing potentiometer is quite critical, but sockets the radio is. means of the stabilizing frequency energy potentiometer after it has been once adjusted it is not fed through the tubes, through which is mounted in the radio fre- the con- necessary to move it unless new tubes densers formed by the plate -grid capa- quency amplifier, and a small amount are put into the radio frequency am- city of the elements of the tubes them- of experience will show just the proper plifier. selves. adjustment for the best results in so The next move is to remove the short One supreme advantage of the use Figure 4. In his second experiment the author used a single circuit tuner instead of the loop-and the set worked well 53 JANUARY, 1924 R. F. A.-REGENERATION This frequency amplifier, out- out transformers, burned out receivers, nected in shunt with the primary. of the radio the side of the fact of the increase in re- connections which open and close, giv- may be accomplished by making to the re- ceptive range, is the action of the radio ing rattles in the ear phones and many input and output connections in preventing any other troubles. ceiver as illustrated in figure 3, which frequency amplifier from radio frequency which might be gen- When it is appreciated that the re- gives a view of the RC set taken of the erated in the receiver it4elf from pass- ceiver and amplifier tubes are meant the back and shows the location ing out to the antenna and interfering for a certain service, and that any at- binding posts. the loop with all of the receivers in the imme- tempt to seriously overload them will If it is not desired to use diate vicinity. not benefit the listener anything, but aerial as a pick-up device it is possible It might be mentioned in passing on the contrary will only damage his to use another tuning element with an that very few of the receivers which apparatus and produce the most horri- aerial and a ground instead of the loop 4 illus- are in use at the present time are ble form of reproduction, then at last and tuning condenser. Figure handled with any consideration of our will the broadcast public begin to get trates this set-up. feelings. If we wish to real enjoyment from its reception of The diagrams, figures 5 and 6 show neighbors' this receive signals, we simply turn up the broadcast programs. the connections necessary to use to tickler coil to a point that throws the To return to our circuits, the General tuning element. It is unnecessary receiver into an oscillating condition Electric receiver may be used with its include the radio frequency amplifier the which gives the neighbors who are lis- accompanying detector and audio -fre- or the regenerative receiver with tening in on the same program around quency unit 'in place of the Westing - detector and audio frequency amplifier C=3 ` T1 C +` A- ° 1- 1+B 1+e T Jet Amp. II Figure 8. Hook-up of a single circuit receiver with three stages of radio frequency amplification and regeneration us the "benefit" of our radiated energy. house RC receiver. The diagram of as the connections of these pieces of The entire basis of this trouble lies in this connection is not given as it is al- apparatus remain unchanged. In the our wishing to push our receivers to most exactly the same as that of the diagram figure 5, the tuner is used with the maximum limit without any con- Westinghouse unit. its normal connections, that is, with the sideration of the fact that the over- A second method of using the same aerial and ground connected to the loading of our receivers and amplifiers units as were referred to in the first aerial and ground posts of the tuner results in deterioration of our outfit, set Of tests, includes the Westinghouse while the output of this tuner is con- which, though it is not immediately ap- RC set with the primary tuning con- nected to the input of the radio fre- parent, finally shows up in the form of densers-which are normally connected quency amplifier unit. various breakdowns, such as burned in series with the antenna circuit-con- In the diagram figure 6 another con - Figure 7. This is the equipment represented in the circuit diagram of Figure 8 54 THE WIRELESS AGE JANUARY, 1924 nection is shown in which the tickler sible to use the Reinartz receiver in resonance relationship one with the coil is made use of as an additional in- place of either one of these receivers other, one of them will be fed through ductance for increasing the wave- in the above tests and there is no rea- as efficiently as the other. As the radio length of the antenna circuit in case we son to presume that it would not be frequency amplifier will not pass any have a very short aerial and wish to possible to use any single circuit re- audio frequency currents, even if the receive on higher wavelengths than ceiver though it is not considered in audio beat note is present in the tuning would otherwise be possible. this article because no other type of elements it will not pass through the In case it is desired to still further single circuit was available for the radio frequency amplifier and the beat increase the range of the receiver, the tests and it was felt that it would he note that will result must come from tuner may be connected as illustrated safer to stick to circuits that had been the beating together of these two radio in the sketch figure 3, and the aerial actually tested and not to include those frequencies after they reach the detec- and ground must then be.connected to circuits which, though according to all tor circuit. the grid and ground terminals respec- theory they should work in these set- As shown in figure 7 the apparatus tively. A small aerial must be used ups, had not actually been tried and used was the General Electric units with these connections, because if a the results noted. throughout. large aerial is used, it picks up so much In a further set of tests the radio The diagram figure 8 gives the radio frequency energy that it is diffi- frequency amplifier unit was connected scheme of connections of this receiving cult to separate one station from an- between the tuner, which is employed equipment and in connection with other, this while if a small aerial is used it regeneratively and the detector and receiver it is well to mention some of 0 -B+Det.+Amp. Figure 10. The Reinartz circuit with three stages of radio frequency amplification may not be possible to go up to the audio frequency amplifier unit. Under the points to be observed in its opera- higher wavelengths because we have these conditions, instead of having only tion. The first step is to tune in the not enough inductance and capacity. one radio frequency impulse, fed station desired with the tickler coil Therefore it is best to use the tuning through the radio frequency amplifier, adjusted in minimum position so that elements with the maximum amount of namely; the incoming radio frequency it does not oscillate. Next adjust the inductance and capacity which they energy from the aerial, there are radio frequency amplifier until it does possess and connect them in a circuit two :-first, the incoming radio f re- not oscillate as in the manner previ- where they have the real control of the quency energy, and second, the radio ously mentioned; now readjust for os- tuning instead of having the maximum frequency component of the plate cur- cillating condition with the tickler coil. of the inductance and capacity in the rent of the detector tube, when the The least amount of regeneration that aerial where it cannot be controlled. tube is oscillating. As these two radio can be used while obtaining desired It might be mentioned that it is pos - frequency impulses are only slightly off (Continued on page 72) Figure 9. A Reinartz set connected to a General Electric three -stage radio frequency amplifier and a detector and audio -frequency amplifier An Efficient Speech Amplifier and Its Application for Phone, ICW and CW Transmission By K. M. 1vícl lwain second formula, we can see that theory in the past Ei X108 the THE popular 60 cycles we would need more it absolutely necessary to Total flux = with that was than eight times the core area that have a D.C. generator or a bank fXtX4.44 would be necessary for 500 cycles, so plate where : Ei=the impressed voltage of "B" batteries to supply the readily seen that a trans- amplifier tube f = the frequency of the im- it can be potential for the speech former designed for 60 cycles will have is fast dying out pressed voltage in radiophone work more than enough core area for 500 and the' understanding and adoption of t = the number turns in the primary winding. cycles, while a transformer designed the circuit that I have here drawn out not have near will In the design of transformers, a safe for 500 cycles will and am going to explain in detail to carry the flux that mentioned popu- allowable flux density (number of lines enough iron prove that the above would thread the core if 60 -cycle en- fallacy. lar theory is a ergy were applied to the primary. So I am under the impression that a you will be perfectly safe in using the great many amateurs are using 500 - 60 -cycle transformer mentioned on cycle A.C. as a source of power for SOME real, authorita- your 500-cycle source of power. so I will carry their radio transmitters The beauty of using this transform- discussion assuming a tive "dope" on ama- on the following is you really have three trans- and explain er that 500 -cycle source of energy, is formers in one. One secondary wind- the filaments teur C.W. transmitters how it can be used for ing supplies the plate voltage for the tubes in the speech by and the plates of the given in this article two kenotron tubes, a second winding unit and then show how, after amplifier Mr. K. M. Mcllwain, a supplies the filaments of the two keno- installing this system, it is possible to winding be- then trons with current (this shift from phone to I.C.W..and noted expert on the sub- ing insulated for 1100 volts), and the to C.W. by a simple switching ar- ject. The information third winding supplies the filament rangement. current for the 5 -watt speech amplifier Figure 1 is a schematic diagram of will be of much interest to tube. the speech amplifier unit, and after RECTIFIER this cir- 200 -meter experimenters. completing the discussion on The rectifier tubes used are UV - cuit, another schematic diagram will rated at 20 watts and 216's and they are be shown of the oscillatory circuit Two are used to give full it to an antenna output. the method of coupling rectification. A PR -535 fila- and stability of wave for greatest efficiency of force per square inch of core area) ment rheostat is put in series with the operation. is about 65000, therefore, the number filament lead of each of these tubes to of square inches necessary to carry the control. This, of course, THE POWER TRANSFORMER get the proper total amount of flux as determined by is necessary so that you will be able to The Radio Corporation UP -1368 the above formula, is equal to that prolong the life of the tube by cutting power transformer is perfectly alright value obtained, divided by 65000. down the filament supply to get nor- for use in this circuit even though we Writing this formula out we have : mal efficiency of operation with mini- have a 500 -cycle source of supply. At Total flux mum amount of filament current. first glance there may be a question in Sq. inches = These rheostats should be connected your mind as to the adaptability of this 65000 into the circuit so that they each have transformer to 500 -cycle energy since Going back to the first formula. The their two resistance coils in parallel. it was designed for operation on a 60 - only value that we are interested in In this way they each will offer a re- cycle circuit. It will work efficiently in this discussion is the frequency f, sistance of 1.5 ohms and will each carry on 500 cycles and I'll tell you why. all the other values remain constant. a current of 2.5 amperes. No other To begin with I'll make the following If we were designing a transformer for way of connecting in this rheostat will statement : You can use a 60 -cycle duty on a 60 -cycle source we would do since any other combination is only transformer on 500 cycles but you can't have the value 60 substituted for f in rated at 1.2 amperes and as these tubes use a 500-cycle transformer on 60 the first formula and if we were de- each draw 2.35 amperes there would cycles without overheating the core. signing it for a 500 -cycle source, we he an unnecessary heat loss in the rheo- The magnetic flux threading the core would have the value 500 substituted stat windings. in place of f. Now, by comparison, it of any transformer is equal to the pro- FILTER of the impressed voltage and a can be readily seen that by having 60 duct wire to supply the plate voltage constant (100,000,000) divided by the in the denominator of the formula un- The num- der consideration we are going to have for the speech amplifier tube is tapped product of the frequency and the fila- of the a value for the total flux that will be off the mid -point of the kenotron ber of turns in the primary it gets to another constant more than eight times the value we ment winding, but before transformer and through a refining (4.44). Writing it out, the formula would get if we had 500 in the denomi- the plate it passes of 60. Now, considering or filtering process that irons out the looks like this : nator instead 55 56 THE WIRELESS AGE JANUARY, 1924 1000 -cycle ripple that predominates at the two kenotrons. It is to be noted the grid of the modulator tube the start. If only one rectifier through tube that this negative side is kept off of a UP -414, 1. henry reactor. were used only one side of the 500 - ground as far as D.C. and speech fre- MICROPHONE CIRCUIT cycle wave would be rectified and we quencies are concerned, the only This circuit Would only have one ripple per cycle, ground connection being a radio fre- is composed of a stand- ard microphone and 6 -volt but when two kenotrons are used we quency ground through a UC -488, 1. battery in have double or mfd. condenser. The reason series with the primary of the UP -414 full wave rectification for this microphone and consequently get will be explained later. transformer mentioned two ripples per above. The cycle which means in this case A radio frequency choke coil is battery may be either a 6 - a 1000 volt storage battery cycles. The first series circuit that it added between the 1000 -cycle trap and or one made up of four 1.5 dry cells in series. comes to is a 1000 -cycle trap which is the plate of the speech amplifier tube. The stor- age battery of course no more nor less than This is simply another UP -415, 1. is preferable al- an application though not of the much discussed anti henry reactor. absolutely essential. There -resonant is a side circuit (wave trap) used in tone winding on this trans- the an- former which may tenna leads of receiving sets to elimi- SPEECH AMPLIFIER TUBE be connected to the nate undesirable telephone receivers by means of a transmitting stations This tube is a UV -202, 5 -watt ra- while double -pole double-throw switch as listening to some desired signal diotron, one of the most popular tubes on shown in figure 1 ; this is desirable another wave length. It is com- for amateur transmission. We now posed of during transmission as it allows the a UP -415, 1. henry reactor in have, after the filtering that it has gone parallel with a .025 operator a means of checking up on mfd. condenser. through, a pure supply for the plate the operation By substitution in the following formu- of his microphone. This of this tube. It is so far from 1000 is really a very essential point las it will be seen that 1000 cycles is because cycles that we will call it D.C. This often in the course of conversation the frequency of a 300,000 meter wave D.C. voltage depends upon the voltage the operator will allow the position of UP -4/5 e % t Henry"' UP -415 UC -488 o 1 A/f. f. K=3 ( óonó I 6 l! UP -4/4 t0 grid of .Wodu/afar UV202 -- Microphone \ .025 M.F. j ` '2-1/C-488/ UP -4/5 ZAF. f henry C PR 535 0 Phone ICW CW 6 c A o--. o% O -o B o-.o 6 v _= o/ o% + C o-o o% o-o D o% Cel, o..M E o-. o-o 170'.o -..- VC -488 = 1 /1 F - figure t Complete circuit diagram of a splendid speech amplifier for amateur transmitters and that 1. henry and .025 mf d. tune that is 'applied to the plates of the the microphone, relative to the voice to this wave length. kenotrons and the per cent. of recti- waves emitted from his mouth, to 3X108 3X108 fied voltage to 500 -cycle voltage to be change so that he will be speaking into = = = 300,000 expected is about 55 per cent. There- it at an angle. This will cause the f 108 meters fore, if there is a potential of 550 microphone to function inefficiently A = 59600 N/LC = 59600 V/1000X- volts on the plates of the kenotrons we and it will be noticeable immediately .025=300,000 approx. would expect to get about 55 per cent. if the telephone receivers are connected where : A = wavelength of that value or 300 volts on the D.C. to the side -tone winding. side. A L = inductance in milli -henries connection is run from the The only way to talk into any kind (1. henry 1000 mh.) plate of this tube through a blocking of microphone whether condenser it be in a radio C = capacity in micro -farads. to the grid of the modulator. phone transmitter or an ordinary land It is the property of a parallel cir- The filament of this tube is supplied line telephone, is to hold the micro- cuit tuned to a given frequency to of- with current from the secondary wind- phone in such a position relative to the fer an extremely high impedance to ing of the power transformer set aside voice waves coming from your mouth that frequency when connected in for this purpose. The mid -point of as to cause these waves to strike the series in the circuit containing energy this winding is connected to the com- diaphragm perpendicularly. The com- of that frequency. Thus the trap of- mon negative. The grid is connected mon practice so prevalent in many of- fers a high impedance to the 1000 - to one side of the secondary winding fices of carrying on a telephone con- cycle ripple. of a UP -414 microphone transformer. versation with the microphone up On either side of the trap, connec- From the other side of this winding a around the side of the face somewhere tions are made to two UC -488 con- connection is made to the negative bias is mighty poor practice. If we are densers (1. mfd. each), the other side battery which for this tube function- going to use a certain kind of ap- of these condensers being connected ing under these conditions you will find paratus we might as well use it to pro- to the negative side of the rectified to be best at some voltage between 6 duce highest efficiency. supply from the kenotrons, which is and 9. The positive side of the bias Before going on to describe the os- the mid -point of the secondary winding battery is connected to the common cillatory circuit it might be well to add which supplies the plate voltage for negative, which in turn, is connected to (Continued on page 64) THE WIRELESS AGE JANUARY, 1924 COPYRIGHT 1924 THE BY TEST TABLE R. P. CLARKSON A REGULAR MONTHLY AUTHOR DEPARTMENT OF AUTHORITATIVE RADIO DATA SHEETS INFORMATION ABOUT RADIO APPARATUS O+B p+A AO POTENTIOMETER PLUG ATTACHED TO PRIMARY SOCKET A UNIVERSAL TEST ASSEMBLY transformer in a jack! over against the plus terminal, plug the a socket, a rheostat, a potentiometer, and phones in on the Just connected on your detector jack and your head These form a universal test assembly when are. The plate variometer or hook-up and repeated test set jack and there you together aisy shown in the picture also require short circuiting. From the plus and minus A binding tickler will in the diagram. set. If posts, leads go to the A battery of your regular A VERSATILE HOOK-UP about 80 volts of B battery, connect an amplifying tube and one you have less than The With the test assembly, another block of B battery to the present amount. each of R. F. and A. F. transformers, you can amplify the new block will connect to the last plus of by using the A. F. as shown. Then minus of will go to the local programs the old and the free plus end of the new block later in the evening, switch to the R. F. transformer as the binding post marked plus B. described and go for distance. Take care that the leads a hard tube, an additional step of A. F. may be from the R. F. transformer are kept short. With idea pops up as a new tried out. Connect, the secondary of any A. F. trans- Every once in a while some old input of your test assembly, connect a hook-up. You can try any of them with the test assembly former to the detector or any regular phone plug to the primary and plug in where you shown. It has all the elements of any receivers. You may have to reverse amplifier. Across the battery is a potentiometer so that usually plug in your plus or of the plug to the primary so that the the input lead from F may be carried either to the connections point, thereby tip and sleeve of the plug will connect up right to the minus filament or to any intermediate Put the potentiometer arm over regulating the "-rid bias. When used independently, contacts in the jack. A and Plus B against the minus post. The effect of various trans- minus B battery will connect with plus formers may be tried and the correct one chosen. goes as indicated. To try out reflex, for example. Plug in on the test The same hook-up makes a step of R. F. Just substi- connect its F. Connect the jack the primary of an R. F. transformer, tute an R. F. transformer for the A. the primary of an A. F. trans- the plug to the primary. secondary, a crystal and secondary to the input. Connect former in series, as usual, and connect the secondary of Short circut the grid condenser and leak on your detector terminal G and leak on the A. F. transformer across from the input with a piece of wire. Put a grid condenser with a .001 con- G and the socket. to the socket. Shunt this secondary the test set between the input terminal the input terminals to your tuner, and put in the test set socket and the denser, connect Put the detector tube your phones in between the B battery and the plus B amplifying tube in your regular detector socket. Change condenser across be- binding post on the binding post. Another .001 or .002 the detector B battery lead to the B and plus A will be of battery lead to the detector tween the binding posts plus test set and the test set B advantage. Use a hard tube. post on the regular set. Turn the potentiometer arm 57 -`111r. ; , .; orkshop Fs' r- Laborat 1 r r 1 ;71111; ,J!1,; :.1,i1 Filament Circuit for the Uses Leaded Glass Window Uni -Control Soldering for Lead-in LTHOUGH amateurs A soldering is one of the wish to secure CHICAGO radio fan whose re- most important MANYgreater volume points in the con- than the small ceiving set is placed on a buffet struction of a set, many UV -199 tubes in amateurs do the Uni -Control af- close to a row of windows containing not know how to do it properly. ford. By the We use of the circuit shown leaded glass panels has found that by should first make here, the second certain that the iron and third stages of soldering the aerial wire to the outside is hot enough; some fans audio -frequency amplification do this by are used of the leaded glass frame, and solder- holding the iron a few inches from the ing the connection to the receiving set face ; if the heat can be felt, the iron is antenna binding post to the inside of the leaded glass, a perfectly good in- sulated lead-in wire was secured with- out having to drill any holes in the sash, or utilize any porcelain tubes or other means of bringing in the aerial connection from the outdoors. Such an idea will work on almost any kind of leaded glass window where the leaded portions do not connect with a wooden frame, and in many ways the arrangement has been found su- perior to pasting two sheets in of tinfoil conjunction with a WD -12 and a on the opposite sides of the glass, UV -201-A as tube, respectively. The to- the condenser effect to a certain extent tal current consumption with this ar- throws the tuning out of adjust- rangement is approximately .37 am- ment with the latter procedure. peres. This system will give louder In experimenting with this leaded reproduction than would be had if UV - glass idea, the Chicago fan 199's found are used throughout. The rest that an adjoining casement window of the circuit may be exactly as shown could be utilized as a counterpoise in the with description of THE WIRELESS directional effect obtained by swinging AGE Uni -Control published in the De- the window in and out. The combina- cember issue of THE WIRELESS AGE. tion of leaded glass, lead-in and coun- terpoise is something that fans might experiment with to their advantage, preferably during the summer months, when the pneumonia germ is not so O. K. With an electric iron this is prevalent as in the winter. not necessary as they very seldom be- Contributed by JOHN T. JONES. come too hot but maintain a fairly con- stant temperature after the initial heat- In the February Wireless ing. The iron should be cleaned and Age Watch For tinned ; similarly the joint to be sol- dered should also be cleaned and tinned. RADIO ENGINEERING, by John R. Meagher. The start of an experiment- Only a small amount of solder need be al home -laboratory course in simple flowed on the joint. Do not leave an and advanced radio design. All easy irregularly shaped bunch of solder on stuff and lots of real dope. THE WIRELESS the connection ; that isn't a good joint. AGE REFLEX. Use clean flux, Complete constructional details of as much as necessary what is doubtless the best one -tube set to make the solder flow-but clean off yet developed. the excess by rubbing vigorously with Mounting radio frequency transformers in tuned DESIGN OF LOOP RF amplifiers at all sorts of peculiar angles seems ANTENNA, by a clean cloth-make the joint shine. to Ralph Batcher. Reliable be quite a popular practice. Just why the data and in- 50-50 bar solder, a good hot special arrangement shown above was used is not formation on how to design the most and clean clear, however, as the windings are in the same efficient loop for all types of receivers. iron and a good flux means success in plane soldering. 58 LABORATORY JANUARY, 1924 WORKSHOP AND IN The Wireless Age Workshop there aren't any expensive or precision instruments. Only tools that nearly every amateur possesses are used in the construction of Wireless Age sets. The accom- panying cut shows the entire outfit, costing about $7.00 ; if you want to equip a workshop to make a W. A. set, take this picture to the local fAtilimeNILY..._ hardware dealer and have him dupli- cate the parts. A Crystal Deceiver Therefore we would earnestly ad- receiver may about 30 miles A long distance regenerative Range: vise the beginner-the amateur who used in the crystal $10 be made with the parts Cost: from $5 to wants to start from the ground up- set described on this page. Complete infor- double slide changes to build a good single or mation on how to make the necessary that the ever so in the next issue of THE to Antenna crystal receiver rather will be published loose coupled WIRELESS AGE.-Look for it! much more complicated type. a - NAVY type loose coupler for Crystal defector A circuit hookup of a simple two crystal set was the first piece of slide tuner is shown on this page. A radio apparatus we ever con- The coil may be wound on a thin inches structed ; it was a monstrous affair. cardboard or bakelite form three The primary was about one foot long in diameter and six inches long, with and six inches in diameter wound with number 20 bare copper wire spaced miles and miles of fine enameled wire : with thin fishing cord. About 100 smaller. in the five the secondary was only slightly Two slide turns of wire can be wound Nearly a month was taken in its con- Awing coi/ inches of available space. fingers struction, but even aching The coil, fixed condenser, crystal served not to dampen our expectations and binding posts may be not stand of wonderful results. For were we mounted on a board about 7" x 10" or going to hear Arlington time signals, may be spread about on a table. Nauen, they Key West, Panama and even Connections should be made with the did we ? Germany ? Sure we were, but Ground 20 wire in exact accordance with time No. I guess not ! We had a hard the circuit diagram. York naval sta- hearing our own New Tuning is very simple : The slider ! and tion only twenty miles away Oh, connected to the ground varies the hours we hung over MATERIAL circuit; the what interminable headset. wavelength of the antenna that set-adjusting the coupling, the 2,000 -ohm the secondary 1 Crystal detector stand. other slider adjusts sliders, and the "cat whisker"-coaxing, 4 Binding posts. wavelength. Both sliders may be avail. cajoling, threatening-but to no 1 Winding form, 3"x6". moved together for rough tuning or 20 bare copper wire. So it was little wonder that the 1/2 Lb. of number "pickup" work and final adjustments crept upon us perhaps this 2 Sliders. secondary slider. thought 2 Slider rods, 6" long. may be made with the - efficient - long- distance - "wonderfully 1 Base 7"x10". The antenna and ground are of much navy -type -loose -coupler" wasn't all that 200 feet of number 14 aerial wire. be a two - importance : The former may be ! it was cracked up to wire aerial between 100 and 200 feet made instead a So we junked it and to in length and erected as high as possi- coil of bell wire long distance reception ; according single -slide tuning single slide ble above surrounding objects. on a ten -cent rolling pin form, those in the "B.R.C." receiver of this wound out of the question. The range with a we had results with it that demon- tuners were upon many and that's the "bunk," because on type is of course dependent strated the frightful inefficiency of that But factors, but reliable reception our single slide tuner we heard more variable bulky loose coupler. volume of broadcasting stations up to 30 miles time, as at present, stations and with much greater But even at that coupler. may be expected. However, much tuning coil was looked than we had with the loose covered the single slide improved couplers greater distances have been upon as a sort of prehistoric and And even with of real DX work down never surpassed the results and numerous reports degraded relic. For in the best radio we have and more have been re- that we had with the single slide tun- of 100 miles circles loose couplers were the thing ceived.-J. R. M. for preventing interference and for ing coil. INFORMATIOAI DESK CONDUCTED BY JOHN R. MEAGHER A self-addressed stamped envelope will insure a prompt reply to any queries on radio Negative Grid Voltage DX Regenerative Receiver Mr. R. C. Panziger of Chicago, Ill., in- Mr. Charles J. Fitzgerald of Savannah, quires: "In looking over some text book Ga., wants diagrams "-some dope on a really good of resistance -coupled amplifiers I long distance one -tube am struck 8 regenerative set for by what is to me an evidently amateur and broadcast reception." wrong connection. 3V It is this: They say 3 V We are printing in these that in a resistance columns a cir- -coupled amplifier the B - cuit diagram of a very good battery voltage must ,L- one -tube re- be nearly doubled be- c A - generative receiver. cause the coupling resistance reduces the No. 28 or 30 double cotton covered voltage on the plate. wire This appears reason- may be used on all the coils able, but then ithey and the wind- say that to make the ing forms should be very thin hard rubber grid negative by 3 volts a 3 -volt C or grid or bakelite. The primary and all battery should be of the inserted between the grid secondary, except 5 turns, leak and are wound on a the negative side of the 3 -inch tube about 6 inches filament. in length; a space of 1.5" is left between the coils. The tickler "Now the grid leak has a resistance ten of 30 turns and the five -turn grid coupling times are high as the plate resistance, so coil may be wound on a lightly constructed why variocoupler shouldn't the grid battery be of a much form from which all other Method of determining higher value in view of the fact that there negative grid voltage windings have been removed. is so much The variable resistance between it and the Best Tube? condensers must be of the grid?" very highest quality and contact to the ro- Mr. C. Smith of San Francisco, Cali- tary plates should Gosh, Mr. Panziger, be through flexible leads. you almost found the fornia, asks for information about the "best" Verniers are not necessary, text books to be wrong-didn't tube and which but if they are you? But one we would recommend used they should be of the mechanical fortunately, they aren't. The explanation f or all-round use. type. The filament rheostat should be of the may be given in a simple battery circuit. There really is no tube to which we can carbon compression type as the UV -200 point and say that it is superior to tube requires a delicate filament adjustment Take all others. (A) which shows a battery C of 3 But we can state which tubes we for best results. The grid leak potentiom- volts prefer for connected across a resistance. If a certain purposes. eter is not absolutely necessary; if it is not voltmeter is connected from the slider to For instance, used the grid leak should be connected the as a detector if the proper positive side of the filament as shown battery voltages to the positive side of the A battery. and are applied, the UV -200 the slider is moved across to (A) the (C-300) is The two -lever switch (shown in the dia- meter more "sensitive" than the ma- will read 3V. If the slider is moved jority of other types. But the gram) affords a simple and quick method to the UV -200 re- midpoint (B) a reading of 1.5 volts quires a storage battery for filament of switching from amateur to broadcasting will be secured. supply wavelengths. The percentage of re- whereas the WD -11 and -12 and UV -199 sistance between (D) and the (C-299) slider to the tubes may be operated with dry 000s total resistance is the same as the voltmeter cells and are capable reading of giving results al- to the battery voltage. most equal to the UV -200. Now suppose the slider is at a point near For radio frequency amplification with fixed (A) where the value of resistance between semi -tuned (transformer -choke coil - the resistance) slider and the positive terminal is al- inter tube coupling the UV -199 most 100 per cent. of the total resistance; usually gives better results-not because it then the is a better tube, voltmeter will r e g i s t e r but because of the lower almost 3V. inter-electrodic capacity and consequent low- Look er capacity across the terminals of the coup- now at (B). Here our C battery is connected to a resistance ling device-making for a "broader" adjust- comprising the ment and corresponding grid leak and the grid -filament resistance. amplification over The latter has an the effective ranges. With tuned transform- infinitely high value (when Hook-up for the DX regenerative receiver the grid is negative) ers or tuned impedance coupling a tube such so the percentage of as the the resistance between the grid UV-201-A will generally give better and fila- results than the UV Simple X Circuit ment to the total resistance (grid -filament -199. However, advan- "Please resistance tage may be taken of the low plate publish a diagram and detail o t plus grid leak resistance) is near- -grid a simple capacity of the UV -199 in tuned transform- Weagant X circuit," writes Mr ly 100 per cent. Therefore there is O. T. Brown a dif- er -coupled amplifiers by placing of Phoenix, Arizona. ference of practically 3 volts negative more turns The diagram be- on the primaries of the transformers; on this page shows the tween the negative filament terminal and al- proper connections for though the average, for short wave recep- a Weagant X cir- the grid. cuit receiver. If the filament tion, is from 8 to 16 turns we have used rheostat is eliminated through use of The point which you overlooked and which about 50 with excellent results and with no a fixed resistance, accounts an "Amperite" or the proper for your query is the difference in difficulty in the control of self oscillation. filament bat- resistance values tery voltage, there will be but two controls; of the filament -grid path For audio frequency amplification and the filament-plate we are the antenna series condenser for tuning and path. The former is heartily in favor of the UV -201-A infinitely high (when (C- the plate condenser for regeneration. If the grid is negative 301 -A) because it is a splendid amplifier; with respect to the filament) it the Weagant circuit doesn't oscillate insert while the latter is quiet; and it consumes so little filament is comparatively low. a radio frequency choke at the point marked current. X. 60 61 JANUARY, 1924 INFORMATION DESK diagram of a "Distortion Free" ampli- .0005 fier is shown on this page. This system f inegohm will give excellent reproduction and though 0005 111 111' UY 20/ A the amplification per stage is not as great C 30/A as in a transformer -coupled amplifier, still is vastly superior. One disad- j the quality C 30/i vantage of this type is the necessity for a high plate battery voltage. However, if storage B batteries (as described in the De- 'SO/urnt/2eAC.C. cember WIRELESS AGE by Mr. J. Brooks) are 6 used this disadvantage will not be a severe ALI 'e"= drawback. ooá For further information about the design, 6Y. A' construction and operation of resistance - that you read diagram for reflex amplifier Weagant X circuit coupled amplifiers we suggest Circuit the article by Mr. Ringle in the December The coils, Li, may be of any form-single we are showing on this page a curkoids, etc. WIRELESS AGE. Surely; 'layer, honeycomb, spider web, reliable circuit diagram for a one -tube re- have an inductance of about Each should flex with an extra stage of audio frequency Suitable coils may be wound on 25 mh. B Battery Voltage amplification. A crystal is used for rectifica- forms with 50 turns of No. 30 .thin 3" "What voltage B battery would you rec- tion. covered wire. A small 7 x double cotton ommend for use with all types of amplifying If good amplifying tubes, like the UV - 10 panel will serve to hold the entire of -inch tubes?" writes Mr. B. Slocum Denver, 201 -A (C -301-A) are used with a plate bat- .equipment. Colorado. tery of 60 to 90 volts you should obtain satis- This is a question we settled with our- factory loud speaker operation. Coil A. F. A. Choke selves some time ago while using a six - You can use the material you have or Elliott of Boston, Mass., writes Mr. Ralph tube receiver and dry cell B batteries with make up the set as follows : diagram of a choke coil audio fre- for "a UV -201-A tubes. Usually we used 90 volts Fixed coupler -3" tube, 1/16" wall and quency amplifier using two tubes." Experi- consisting of four 22.5 -volt blocks. 4" long. Primary, 60 turns of No. 28 or is shown on A choke -coil a. f. amp. hook-up ments showed that there was no decided de- C. wire. Secondary, 50 turns of condensers may be 30 D. C. this page. The coupling crease in signal strength when only 67 volts D. wire. Separation of the grid leaks of No. 28 or 30 C. C. of 2 mfd. capacity and were used. And as our detector plate was coils. resistance. The chokes /" between about 2 megohms operated on 67 volts, we were able to elimi- Potentiometer -200 to 400 ohms with a -coupling condensers - - - the plate nate one battery lead by making .002 mfd. fixed condenser shunted across the voltage of all tubes 67. Furthermore, with slider and negative A battery terminals. this value of plate voltage there was no Audio frequency transformers-Both 4 to Grid batteries. And in /e0A' OuOut necessity for special grid 1 ratio connected exactly as shown. addition, replacement of the three blocks is Filament controls may be 10 -ohm rheo- Lhote than four. of the proper type. coi/ cheaper stats or "amperites" We always use separate blocks to make A standard 7" x 10" hard rubber or Bake- up the complete battery in order that if one lite panel may be used if the parts are ar- cell goes dead, only one block will have to ranged as suggested in the layout sketch. be discarded, whereas if one cell in a unit fixed coupler is mounted on the panel IU 11111111111111 The AA., aiilAult block of 67 volts is defective the whole variable condensers and the co A. F. A. circuit above the two Choke battery might have to be "junked." etc., are fas- an impedance t speech f re - vacuum tubes, transformers, should have we would suggest the use of three base. or greater than the internal So tened to the wooden quencies equal blocks of either storage or dry cells. impedance of the tube. The secondaries of /0" Ford spark coils have been used quite suc- Amplifier 11IIIP"' cessfully. Reflex Mr. K. Merz of New York writes: "I Quality A. F. A. have 'tried numerous two -tube reflex hookups this Mr. R. Wittington of Astoria, L. I., is but have had very little success with '-perplexed over the choice of an ampli - system. It seems that my reflex receivers that the transformer - just won't percolate. I imagine it is the 'her. I understand them coupled type affords the most amplification fault of the circuit, as I have followed all the equip- per stage, but that considerable distorltion out exactly and have 'tested obliged if you will .is inherent in them. Would you kindly pub- ment. I would be most hookup for a reflex lish details of an amplifier that will give publish a good, reliable 00.' CORD loud speaker ,good undistorted amplification f" receiver that will operate a with two tubes." Panel layout for the reflex amplifier Tickler Coil R. F. Choke Loud" -250 Dß -20/-A Speak," 2mfd. UY- 20/-4 mfd. .0025 0 me5yg. .00251 l/V-20/ A Detector -tube ¡S ohm rheo.- /20-150 volts -3 Y. -frequency amplification 11111i1iH1111 + -11111111111111111 Hook-up for undistorted audio - 9vo/ts 6 volts /50-200 volts "C" Batt. '4" Batt 'B" Batt. V.mzemVJImV%llml%mVJJI.I%ll.l%Jll%J61,1/4.).1lJmzJJImp.!.11l!.tJliem. 7- NEW APPLIANCES AND DEVICES ., e:,:<.YY.Y"./Yd.rG^7rclrî.ltelrclrY. .:: trAlUs11r.11:1^.r,Y.11n11tr.11rn1Ir. .YtlY.nnlfr.l1MMIMfr.l11il1fYîll r.yn411Ire11r.Yllretlrerlrr.`i1fr.l1fr.Yllr.11rr. r Y1eVi The New Valley Charger Hartman Loop tects the parts from dust and moisture and THE Valley Electric Company allows a clear view of the interior. of St. THE Hartman Loop Aerial Louis is now in full production is well adapt- Type No. 110 has a resistance of 400 on the ed for use with standard new Valley Type ABC Battery Charger, the sets. Using a ohms which is the best value for accurate .00025 mfd. variable improved model which the company has put condenser across the adjustment of plate potential and grid bias loop, the wave length range out this year. will approximate in vacuum tubes. A 2,000-ohm type, No. 200-550 meters. The type ABC charger has been designed 111 is also made for special applications. The Hartman Loop is to charge all radio batteries. It is built small but highly on efficient and directional. the same principle as the other successful A detachable wood base, with a 4 -inch moulded Valley rectifiers, but it is made for use on dial is provided. All castings are made Radeco Safety Fuse all types of radio storage batteries, includ- of aluminum. ing the 2 -volt peanut tube batteries, 6 -volt The combination of carefully selected wood THIS device is a fuse which fits over one A batteries, and one two, three and four cross arms, and the arrangement of the wind- of the filament terminals of a vacuum 24 -volt B batteries. It has a tap for 12 -volt ings equalizing the strain, minimizes the tube and absolutely prevents "blowing out" batteries and may be used on 6- or 12 -volt possibility of warping. from any excess current such as "B" battery, automobile batteries. etc. A fuse of this sort is a necessary article as we all know that many tubes are need- lessly destroyed by the accidental crossing of wires. In order to make this new and complete radio battery charger harmonize with the The fuse is attached in an instant and does home radio receiving set, the Valley Com- not interfere with the efficiency of the set or the pany has adopted a bakelite panel for the fitting of the tube in the socket. face of the charger with fittings and other parts in keeping with the use to which the instrument is to be put. Monroe Ribbon Grid Leak ARATHER novel panel mounting variable grid leak has been developed by the New Non -Inductance Monroe Manufacturing Co. of Chicago. Potentiometer ADIO fans who are using wire wound potentiometers and have had trouble with inductance in their receiving circuits will be interested in the new non -inductive potentiometer, shown in the accompanying illustration, which has been recently per- fected by the Central Radio Laboratories. The new instrument has a thin resistance The Bradleyswitch element made of pure graphite and is not cnly non -inductive but also free from "skin THE Allen-Bradley Co., Milwaukee, Wis- effect." This feature of the design elimi- The resistance element is consin, have arranged on a added a fourth item to nates the choke -coil effect found in wire flexible ribbon which passes through their list of radio products, rollers known as the wound potentiometers and also insures the -somewhat on the style of a clothes wringer. Bradleyswitch. This is a very compact, same resistance to radio frequency as to di- By manipulating a knob connected completely enclosed, to one single -pole switch for rect current. roller the length of ribbon between opening battery circuits. contacts It is mounted by Smooth, noiseless operation is made pos- may be varied. Thus the value of resistance drilling a hole in the radio panel and secur- sible by a circular disc of brass placed be- may be increased or decreased at will. ing the switch by means of a knurled nut. tween the resistor and the pressure shoe This The switch is operated by pulling variable grid leak will prove of value or pushing and mounted in such a way that it can be the switch button. in the operation of critical vacuum tube de- made to engage the resistor at any one of tectors, in the Flewelling The Bradleyswitch circuit, in resis- is nickel -plated and the infinite number of points. As the re- tance coupled amplifiers and as distortion the button is polished black, thus conform- sistor is not touched by the sliding shoe there smoothers when connected across the second- ing with the standard finish used for radio can be no wear. The moulded base is pro- aries of audio frequency equipment. transformers in an vided with a transparent cover which pro - audio frequency amplifier. 62 63 JANUARY, 1924 APPLIANCES AND DEVICES live metal parts than the usual run of radio equipment, there are heavily nickeled. No The Accuratune No parts can become lost. has been developed a special plug which is are exposed. THE Accuratune is an actual micrometer shown in the accompanying illustration. control. For coarse adjustment the The Pacent 100 Duoplug accommodates like any ordinary dial. larger knob is used two pairs of phones in parallel. No tools are The Amsco Compensating The smaller knob operates the vernier required in making connections. The spe- mechanism for fine tuning. By rotating the Condenser cial type thumb nut connectors may be tight- dial from 0° to 100° by means of the ver- device serves to eliminate ened with fingers, the nut being slotted so unique nier knob you can pick up station after THISnecessity of a potentiometer in radio dime or other thin coin a par - the station. that with a amplifying circuits, whether of can be made. The frequency The Accuratune is made of genuine Bake- manent, secure connection the tuned, untuned or resistance coupled lite (highly polished, black or brown) with special toggle structure of the connector type. And because variation of its capacity Pacent feature, beautiful silvered dial and neatly engraved screw, which is an exclusive is so readily accomplished the control is posi- graduations. Fits either 3/16 or /-inch is important in that it permits two different tive and effective. instrument shafts. Dial 4 -inch diameter. sized cord tips to be connected at the same time. The connectors also accommodate stranded or solid conductors, spade tips or practically any other type of terminal. Grooving on inside surface of connectors prevents connections from becoming loose. Bakelite insulation piece between the con- nections obviates any possibility of short cir- A Particular Plug for Particu- cuiting and provides a means of attaching the cord. The engraving on this strip indi- The manufacturers of the Amsco con- lar Radio People cates the polarity of the connectors. The denser have used Radion insulation in the is of Bakelite, finely compensator in an endeavor to keep both IN order to meet the requirements of that handle of the plug dielectric losses at group of radio amateurs and radio broad- knurled, making for neat appearance and the surface leakage and minimum. cast listeners who insist on something better for a positive grip. Exposed metal parts a State College Receives Gift of Radio Plant is that the THROUGH the efforts of Dean new aerial from two 60 -foot A frame communication, it anticipated College towers, spaced 125 feet apart. A industry will require a large number of Goddard, the New Mexico trained Agriculture and Mechanic Arts is counterpoise system of 20 wires is electrical engineers especially of branch. Indeed, at the present the recipient of the gift of a new radio planned. These wires will radiate in this equip- from the roof of the building in all time, the manufacturers of radio station. This will include the demand, a 100 -watt trans- directions to steel post supports at equipment cannot supply the ment for constructing has resulted from mitter and the building to house it. their outer ends. and much damage for experi- The transmitter planned is of the the flooding of the market with cheap The station will be utilized put out by purposes and amateur relay reversed feed back type, using two 50 - and worthless apparatus mental and get -rich -quick dealers. work under the government license of watt radiotron tubes for oscillators. incompetent 5XD. It will he separate and entirely The plate current will be supplied by a distinct from the present radio house kenotron rectifier and filter system. and its equipment. which will then be The materials for this have already used solely for broadcasting service been purchased, and the set will be Radio Has Great Speed call letters of KOB. constructed by the Radio Club mem- under its present are 186 miles from a broad- for the new radio house call bers from designs furnished by Dean you Plans IFcasting station, when you listen in for a frame building 15x24 feet, with Goddard. you hear each sound one thousandth of concrete floor. An operating room will When completed, this new station a second after it is produced in the occupy the east end of the building, will give the College radio experimen- its broadcasting studio. This is because while a club room for the College tal facilities, which, combined with present extensive equipment, will be radio waves travel at the rate of 186,- Radio Club will be at the west end. fast as to be in- a workshop unsurpassed by any college in the 000 miles a second, so The center will contain over all normal broadcast- for the storage of miscel- west, if by any in the United States. stantaneous and closets ing ranges. If you were in a studio laneous equipment and batteries. The work of the present station has a national reputation for the and with one ear heard a note struck A site east of the Engineering De- gained could in this branch of engineering. on the piano, and at the other ear partment's Forge Shop and south of college a thou- A number of students are now attend- hear the same note transmitted the Commercial Building has been se- your ears would of open ing this institution because of the ex- sand miles by radio, lected. This site gives plenty to distinguish between the the building, where a new ceptional facilities offered along these be unable space about two. They would sound like a single the T -cage type can be easily lines. With the wide spread of inter- aerial of means of note. erected. It is planned to support the est in and use of radio as a 64 THE WIRELESS AGE JANUARY, 1924 Speech Amplifier used in this circuit are the same and necessary in parallel with it to tune to (Continued from page 56) may be either of the following type 300,000 meters (1000 cycles) . of tubes: here that the function that each UV -203, 50 -watt tubes; UV - The radio frequency choke of the 204, 250 -watt used; switches A, B, C, D, E, performs is in tubes; UV -206, 1. KW. here is a UL -1655 which has an in- tubes. The speech the course of changing from phone to amplifier will sup- ductance of 3 mh. CW and ICW ply enough energy for the grid of the We now arrive and will be explained at the modulator - in modulator tube detail later. tube no matter which of the with a plate supply that is very nearly foregoing tubes mentioned Figure 2 is a schematic diagram of are used. D.C. In this case, due to the the oscillatory circuit used by the popularity of MODULATOR writer in 50 -watt tubes, the circuit has been This connection with the speech adapted tube is a UV -203, 50-watter,. amplifier just described, to the use of these tubes. In and its filament and since it the case of the writer is supplied by the. worked so well I think I will describe the UV -206, 1. radiotron winding on KW. type of tube was the power trans- it here although some of you used and the former and is controlled may be results were very gratifying. by a PT -537 already familiar with this type of cir- filament rheostat. The grid of this, cuit. In general, it is a closed oscil- POWER TRANSFORMER tube is supplied with excitation from, latory circuit coupled loosely to the an- The power transformer in this case the output of the speech amplifier- tenna system, and the inherent advan- is the UP -1016 which is rated at 750 the point marked "to grid of modu- tage of this kind of a circuit is that the watts output and is capable of deliver- lator" on the diagram. frequency of the emitted" wave is de- ing the plate supply for the two UV - pendent 217 kenotrons and OSCILLATOR upon the constants of the the filament supply Another closed oscillatory circuit and for the kenotrons and the UV -203 ra- UV -203, 50-watter is used! the here as an change in capacity that the diotrons used in this circuit. oscillator and is connected: antenna to the plate supply undergoes when swinging in the wind RECTIFIER through the 6 mh. choke composed of will not change the frequency of the We two UL -1655 ra- will use two UV -217 kenotrons dio frequency chokes in series. 11P-/654 to Speech Amplifier UC -/0/5 50 Henries U[-/655 2-u4-/655 UC -/0/4 :0005 M.F.-- .002 MP 0 i .00002 M.F.yJ R. F. Choke UC -/0/5 .0005 M.F. 2 ó t - UV -203 - T 2- UC- 4J0 2 M. UC -l0/4 F' .002M.F. rt-1 UP -/7/8 P7-537 5000 w ./5 Ohms Figure 2 Rad/at/on -,-- Ammeter- This diagram represents the hook-up of the oscillator emitted wave ; it will simply change in this case for full wave rectification The filament the efficiency of transformation of en- is connected to the. and will control their filaments by same winding of the power ergy from the closed oscillatory or tank means transform- of a PT -537 filament rheostat er and controlled by the same rheostat: circuit to the open oscillatory or an- in series with the secondary tenna circuit winding as the modulator tube. as the antenna system that supplies these filaments. It will swings in and out of tune with the be necessary to connect OSCILLATORY CIRCUIT tank circuit. this rheostat There is of course only in the circuit with its resistance coils in The constants of this circuit depend a slight capacity change during the parallel in order to handle upon the wave length swinging the current it is desired to of an antenna so the relative for the two filaments. The A.C. radiate and assuming an amateur drop in radiated sup- wave energy due to this ply to the plates of these tubes from length around 200 meters, the con- effect will be small. This type of cir- the secondary winding of the power stants of the circuit would be as fol- cuit will radiate a constant frequency transformer is 1500 volts each and lows : The tank inductance should be- regardless of changes we in the constants can expect to get a rectified voltage of a UL -1008 oscillation transformer in the antenna system due to climatic 66 per cent. of the A.C. which has an inductance conditions. or 1000 volts. of .06 mh. There is one slight dis- and the capacity shunted advantage to FILTERS across this. a circuit of this type be- coil should be a UC -1015 which has cause there is a slight loss of energy UC -490 filter condensers are used taps for three during different capacities, the transfer from the tank cir- here instead of UC -488 as in the case namely, .0003, .0004, .0005 mfd. The cuit to the antenna circuit. Obviously of the speech amplifier because they plate is connected to this it would coil through, be better if we could have a will stand 1750 volts against 750 volts a UC -1014, .002 mfd. blocking directly coupled con- type of circuit that for the latter. denser. The grid is connected to the would emit a constant frequency as we The 1000-cycle trap circuit in this other end of this would coil through another be able to get more energy into case is made up of a UP -1654 filter re- UC -1014, .002 mfd. blocking the condens- antenna. There is a circuit under actor in parallel with a UC -1015, .0005 er. The grid is also connected development to. that will do just this very mfd. condenser. The inductance of ground through a UP -1718, 5000-ohm, thing and later on I may write about the reactor is 50 henries or 50,000 grid leak. The ground this new tap is con- circuit in detail. milli -henries and therefore a UC -1015 nected on the coil at a point about 1/3' The modulator and oscillator tubes condenser of .0005 mfd. capacity is (Continued on page 74)- 65 JANUARY, 1924 THE WIRELESS AGE "THE AIR IS FULL OF THINGS YOU SHOULDN'T MISS" Radio has moved from the laboratory and amateur's work -table out into the refined surroundings of the family living room. In keeping with this new companionship we offer this reliable, longlived Eveready "B" Battery, in an attractive, new metal case, worthy to stand beside the rich cabinets of fine radio sets. Eveready "B", 22'4 volts, No. 766 with Six Fahnestock Spring Clip Connectors. When Radio called, Eveready was ready dry cell TWENTY-ONE years ago, when wireless them to discover how the known telegraphy had its first birthday, National could be improved for radio work. Carbon Company's dry cell batteries were The fruit of these efforts is the Eveready nine years old. Even then its batteries were family of radio batteries, conspicuous for world famous as convenient, economical and vitality and endurance-the right battery efficient sources of electric energy. by test and proof for every radio use. of broadcasting, With the introduction To be certain of battery satisfaction, into universal service. Radio radio leaped insist on Eveready Radio Batteries-they used Eveready Batteries as their engineers last longer. All reliable radio dealers sell them. standard in designing tubes and receiving on sets. Eveready engineers, backed by the Inforgtative and money -saving booklets Radio Batteries sent free on request. most complete research and testing labora- tories known to the industry, worked with NATIONAL CARBON COMPANY, INC., New York, N. Y. Headquarters for Radio Battery Information INC. If you have any battery problem, write to RADIO DIVISION: NATIONAL CARBON COMPANY, (=I Lq8 Orton Street, Long Island City, N. Y. Eveready 6 -volt Storage Battery Eveready Radio "A" Dry Cell Specially manufactured for use with low amperage tubes No. 764 No. 767 The Space Eveready Three "B" Battery, 45 volts Saver or "C" Battery Vertical Variable taps Fahnestock Clips Clarifies tone and 22 %Yvolt increases "B" EVEREADY "B" Battery Battery life Radio Batteries -they last longer When writing to advertisers please mention THE WIRELESS AGE "u.:vw,Vdtmmm1.1EC:.VJLse!Ll!.C!lJu.!.CudIJLmej:[email protected]/JUm6eu.!tmw t.ty,(2rmu.wt!.1Le. ' INDUSTRIAL INKLINGS ,4edníYYifidrr.vY.tiy.tiMrYiYltYdiali it irIKINIMAYmYkliYAI trellYi'd>rsilrr. . reelimt.rnur.er.tiMMIYIM . arn r r/`cliYl'lrfYi1'YIYYlrtidrYieilte Every afternoon at 4:30 he gives an in- advertising with the slogan, "This is the formal talk in the store on Super -Hetero- truck that will install your Christmas Radi - dyne circuits, and other current topics, to olas free of charge." all who wish to attend. Questions from the audience are encouraged. THE Radio Bible Service Bureau, Cin- cinnati, Ohio, is organized to give the WB. JOYCE, chairman of the National world daily, "a message from the Word of Surety Company, has acquired a sub- God by radio broadcasting." stantial interest in the Dubilier Condenser & Radio Corporation and has been elected THE appointment of E. W. Martin as a member of the board of directors. Chicago District Manager has just been announced by the Valley Electric Company, St. Louis, manufacturers THE Willard of Valley Radio Storage Battery Company Battery Chargers and other electrical has a monthly publication, "The Con- products. nector," issued in the interests of a still bet- Mr. Martin ter Willard Service Organization. comes to the Valley organi- Their November zation from the Westinghouse Electric and number has some lively Manufacturing window display stimulators. Company with which he has been associated for a number of years in various capacities. BURT'S SUPPLY AGENCY, Atlantic The appointment of C. L. Krentz in the City, N. J., went out after the business sales department of the Chicago Office is on an "installation service" basis. A truck also announced by the Valley Electric Com- carrying a ladder is featured in Mr. Burt's pany. To the Philadelphia Show by Airplane HE National Carbon Co., in promot- ing the idea of radio in the home, employs a happy combination in their advertising-romance and art. Home and family brought into contact with the heart of the world through radio has a romantic touch in, "The air is full of things you shouldn't miss." Linking radio and fireside with the cos- mos has been admirably accomplished by the artist in his composition. The result should be suggestive to other advertisers. THE Burgess Battery Co., Madison, Wis. publishes a pamphlet containing an index of broadcasting stations, forms on which the stations heard may be recorded, maps illustrating the standard time divisions, a chart of comparative times in the principal cities, besides some general information on dry cell batteries in radio. ACOMBINATION catalogue and instruc- tion booklet is published by Herbert H. Frost, Inc., Chicago, Ill. It contains several unique features desirable to radio fans. THE Atlantic Radio Co., Boston, Mass., designed a novel window display for stimulating holiday sales, pushing the slogan, "Give him a new set of tubes for Christ- mas." A large cone, supporting successive types, R. illustrated the progress made in the develop- NA' C. D. TUSKA, president of the C. D. Tuska Company, received a tele - I" phone ment of vacuum tubes. S O S from his Philadelphia representative, Mr. L. B. Underwood, that the Superdynes had not arrived for the radio show which opened MR. HAYNES of Haynes -Griffin Radio that day, Novem- Service Inc., New York City, has in- ber 13. Mr. P. K. Spencer, factory manager, loaded several in his private airplane troduced a feature that marks another mile- and with Mr. Tuska reached Philadelphia by noon, a flight of less than two hours. stone in gaining public confidence. 66 67 JANUARY, 1924 THE WIRELESS AGE New Magnavox Catalogue for the Radio User has just been published by the THEREMagnavox Company a very useful and 1924 Model of New attractive catalogue for the information radio users. In addition to very adequate illustrations and descriptions of the Magnavox Radio line, there is also an entire section devoted to correct hookups and general information, which even the very experienced radio en- thusiast will find helpful. There are also pages devoted to illustrat- ing and explaining the fundamental principle involved in the Magnavox electro -dynamic and also the Magnavox semi -dynamic types of reproducer, the latter type having been evolved in order to meet the requirements of dry battery receiving sets. Copies of this Magnavox radio catalogue LOUD SPEAKER will be sent on request by the Magnavox Company, Oakland, Calif., or 370 Seventh Avenue, New York City; and are also ob- tainable from radio dealers who handle the Magnavox line. Pushing Small Parts PRICE one of the best radio trade catalogues INwe have yet seen, the H. H. Eby Manu- Now facturing Company "tell the world" about the famous Eby binding posts. Mahogany The first text page contains six points of business policy worked out in a most clever Finish $175° and sincere manner. We wish every manu- would cut out that page, facturer and dealer (West tif Mississippi $19.00) hang it over his desk and believe in ìt. After this bit of super -salesmanship the different types of Eby binding posts, each with its distinguishing name, are described in detail; splendid photographs helping the reader to appreciate the numerous mechani- cal and electrical features of superiority. Then, having told why Eby posts are good, they'back it up with a two -page half -tone which speaks for itself insofar as it pictures almost 57 varieties of manufactured radio Eby posts. Today receivers and instruments using See It Nothing could be more convincing! will gladly give The end of the catalogue is devoted to Step in your dealer's store-he subjects most dear to the dealer's heart- you a demonstration without obligation. See this national advertising to make Eby post move new value, placed on the market now display wonderful fast and attractive, snappy counter first time. You will realize the outstand- to catch the eye and spare cash of the cus- for the tomer. ing superiority of the new Pathé Loud Speaker. To really appreciate the 15th catalogue of Notice its beautiful Mahogany finish and its abil- the Eby Manufacturing Co., one has only clearly. like to see more of ity to reproduce long distance signals to read it. We would on the its kind. With the new low price it is the best buy market. America Exports Sets to 41 Countries Free Pamphlets manufacturers of ra- on the Pathé AMERICAN are leading the Write now for free pamphlets dio apparatus Variometer, Pathé Vario - world in exports, the past eight Loud Speaker, Pathé months' total being valued at $2,200,- coupler, Pathé Dials and the new Curtantenna. 000, according to Department of Com- for new special August, Argentina Jobbers and dealers write merce figures. In Proposition. led other countries in the purchase of American -made radio equipment ; our exports going there amounted to $99.059. Uruguay stood second with Pathé Phonograph 8z Radio Corp. while $40,984 worth of apparatus, AVENUE BROOKLYN, N. Y. $27,648 worth of 20 GRAND Canada imported Sales Office, 533 Wabash Ave. Chicago, Ill. American equipment. The total Amer- Western to ican exports in August amounted $307,127, going to 41 countries. THE WIRELESS AGE When writing to advertisers please mention 68 THE WIRELESS AGE JANUARY, 1924 Fact of Panel Mounting The Personality of a Broad- Rainbow Multi -Plug and (8 ft.) Cable casting Station . Either, panel binding or post mounting. (Continued from page 38) Does away with unsightly wires. ` . a long time now, a'* t Leaves set free from live wires when not in use. almost every night. Several binding post ends can be connected to different sets-using An infinite variety of entertainment \ \ one plug and cable connected to batteries, etc. has come over the "radio" and many Ideal for dealers-and experimenters. d+AMPL.r 8 evenings I have stayed home to listen B DET Prices Multi -Plug & Cable Panel Mounting type, $4.00. Binding to the program. Post type, complete, $5.00. Showing Contacta My distant station has never failed Write for illustrated folder of Howard B. Jones Radio Products. me. At the touch of the switch, it was HOWARD B. JONES, 612 S. Canal Street, Chicago, Ill. there, and I enjoyed the music pro- vided for the evening. But in the year and a half that I have been listening in, how many times have I compli- mented the station, how many times have I told of my appreciation for the work of the invisible, but real artists? Well, I remember writing once, a short letter relating the joy which followed the reception of a fine concert, one lonely evening last winter. Only once? SOLID COMFORT Surely I must have told the station how much I liked the quartet selections which 'I heard in the early part of the Comes With The Use Of The year, and the instrumental music which pleased me particularly some time ÍRADE MARK later on in the season. Did I forget to write AUDIOPHONE the humorist who gave me a full eve- REG. U. S. PET. OrrMOE ning's entertainment only last May? Of course, I am not speaking for little because nothing is lost from Johnny, who could say a lot for the bedtimes tales, nor for Jane, who is the original broadcasting. quite grown up, and who likes the dance music. But I do feel a sense of Not only is it easily possible to distinguish the guilt, and I am anxious to right myself words of the speaker, but also the minute gradu- with the station, whose daily programs ations in pitch, timbre and quality of overtones have relieved me from much of the which distinguish individual voices. day's weariness. The Audiophone is complete and self -contained -- So, as soon as I have finished -this, needs no separate battery or other accessories- I will begin a real letter of thanks to goes to you ready for use on connecting my favorite station. Perhaps my to your favorite receiving set. It will prove a source of lasting station is yours also. It will pride and pleasure. appreciate a word from all of us. Audiophone Sr. Price $32.50 The Navy's Radio Net Audiophone Jr. Price $22.50 (Continued from page 33) accurate astronomical observations are Bristol One Stage Power impossible. The ship sends a radio call to one or more of the navy sta- Amplifier tions, the request is relayed to th compass station, and the position c If greater volume is desired, over what you the vessel within one -tenth of a degr already obtain, use the Bristol One Stage is immediately dispatched to the sh' Power Amplifier. No C Battery required. More than 5,000 bearings a mot are furnished Price $25.00 to merchant sl' the department's compass static system last year being the mt THE BRISTOL COMPANY preventing fifteen merchant Waterbury, Conn. from going aground. The grea Atlantic liners invariably use t vice when approaching port it ment weather. The radio be Please send me with- more recent development, wher , out cost or obligation Name radio compass is on board tl; to myself, Bulletins enables mariners to determin Nos. 3006 and 3011-V own position by radio, on Bristol Audiophone Street and No. and to and One Stage Power straight course to safe anc Amplifier. The compass service is City State of pa value in so-called fogbound poi as New York, where prevent When writing to advertisers please mention THE WIRELESS AGE JANUARY, 1924 THE WIRELESS AGE 69 ,so practical so convenient The Dubilier Ducon is the stand- ard socket -plug. It takes the place of the cumbrous, unsightly antenna. Simply screw the Ducon in any lamp -socket and connect it with the radio set. Not only are the broad- casting stations heard clearly, but tuning is sharper. Dubilier Condenser and Radio Corporation 48-50 West Fourth Street New York DUBILIER MICADON ?he Standard Fired Cwndanser DUBI LI ER VARIADON Variable Aiwa Condenser DUBILIER DURATRAN Radia FregNeruy Trunsjoemee \Vhen writing to advertisers please mention THE WIRELESS AGE 70 THE WIRELESS AGE JANUARY, 1924 lays in landing cargoes means in the course of a year millions of dollars to American commercial interests. The Federal Poulsen arc, varying in sizes from 100 to 500 KW., is the type BAKELI of transmitter in general use by the high power navy stations. Originally all stations used spark transmitters, but the continuous wave in the form of an arc was later standardized. With the development of the radiophone the navy was urged to replace the arc sets with alternators on account of the ob- jectionable "mush," harmonics and compensation wave inherent with all arc transmitters, but subsequent ex- periments to overcome interference Paragon proved successful and it is expected and Bakelite that the arc will resume its position The pleasure and satisfaction that the Its great mechanical strength, perma- as a satisfactory single wave contin- Paragon Receiver brings to the family nent beauty of finish and color en- circle is appreciably increased through hances the value of any Radio Equip- uous wave transmitter. For low power the use of Bakelite. ment in which it is used. stations the spark set is expected even- Bakelite possesses a combination of tually to be replaced The Adams -Morgan Company by the continu- properties not found in other materials, chose ous wave or interrupted which makes it peculiarly suitable for Bakelite because of these desirable continuous this service. Its excellent electric qualities and, for the same reason, lead- wave, inasmuch as the spark uses too properties provide complete insulation ing Radio Manufacturers have adopted wide a band. The navy has devel- Bakelite as standard insulation that remains unimpaired under all at- for the oped an attachment to spark sets in mospheric conditions. manufacture of parts and complete units. which tubes can be used to give a sat- Because of its high temperature resis- isfactory tance and non-absorbent properties, wave, thereby making it pos- Send us your name and address and we sible to remove the Bakelite performs equally well in all will mail you a copy of our Radio spark interference climates. Booklet A. at much le';s cost than if complete new tube transmitters BAKELITE CORPORATION were installed. 247 Park Avenue, Important contributions to radio art New York, N. Y. have Chicago Office: 636 West 22nd Street come out of the navy's radio re- search laboratories. Much of this work is done in co-operation with the Bureau of Standards and with com- BAKELITE mercial radio equipment manufactur- ers. The list of achievements in- Condensite cludes, in general, improvements in R,DMANOL spark and C.W. transmitters, devel- are the registered opment of steel and telescope anten- Trade Marks for the nas, Phenol Resin Products vacuum tubes, receiving appara- manufactured under tus, radio mechanical relays, high patents owned by speed transmitting and recording sys- BAKELITE tems, depth sounding and submarine CORPORATION sound signal devices, and aviation radio. Duplex operation has been in- f stalled in each navy district whereby several transmitters are used in the sending station and messages are re- THE MATERIAL OF A THOUSAND USES ceived by remote control. The Ar- lington station has six transmitters that operate simultaneously. Central headquarters for the corn- p lete system are at Washington where in coming and outgoing messages for al 1 stations are coded and decoded. Learn the Code at Home with the Omnigraph The central office operates the Arling- "Just Listen-The Omnigraph will do the teaching" THE OMNIGRAPH Automatic Transmitter will to n, Annapolis teach you both the Wireless and Morse Codes- and Sayville stations right in your own home-quickly, easily and in- by distant control, the expensively. Connected with Buzzer, Buzzer and business for all Phone or Sounder, it will send you unlimited mes- of her stations being handled sages, at any speed, from 5 to 50 words a minute. from THE OMNIG RAP le not an experiment. For W ashington either by leased more than 15 years 1t has been sold all over the land lines world with a money back guarantee. THE O M N I o r radio relays. Based on commercial GRAPH is used by several Depts. of the U. S. Govt.-in fact, the Dept. of Commerce uses THE raates the system handled for the navy OMNIGRAPH to test all applicants applying for a Radio license. THE OMNIG RAP has been st year nearly $3,000,000 woi of successfully adopted by the leading Universities, th Colleges and Radio Schools. b usiness, and for other cepartments Send for FREE Catalog describing three models. 514 to 530. DO IT TODAY. in cluding the Department of Agricul- THE OMNIGRAPH MFG. CO. tu re, Commerce and State over $1,- 16B Hudson St. New York City 000 ,000. Receipts from commercial If you own a Radio Phone set and don't know the Code-you are missing most of the fun w ork were approximately $30l..000. lVhen writing to advertisers please mention THE WIRELESS AGE 71 JANUARY, 1924 THE WIRELESS AGE "Some Condenser" says the "Radio Bug" Makes your receiving set respond to every broadcasting station opera'ing. The size of the Kellogg Condenser and dial gives easy, accurate tuning. The vernier makes unusually sharp tuning a simple matter. The end plates are of the best radio insulation in use today -Bakelite. The Kellogg accurately built dial is also of Bakelite, which retains its hand- some appearance indefinitely. Its heavy reinforced construction and beauty of design add to the appearance of any set. The rotor plates are properly spaced and bolted together, making it im- possible for them to make contact with the stator plates. arNbitiw bearing surfaces assure smooth, even rotation of the rotor plates \eete.9.\i Large and reduce wear to a minimum. The high class workmanship, with the fine materials used in Kellogg Va- riable Condensers place them in a class by themselves. The relations of the capacities is such that as great a flexibility as desired in any set may be maintained by the use of the various models. The resistance to alternating currents at the average wave length is low thus assuring full use of all current intercepted by the antenna. The Kellogg variable condenser is a precision instrument built in size, proportion and ratio for use as a decremeter or wave meter, as well as for control of capacity in the radio broadcasting and receiving sets. This makes it of far greater value to the amateur as well as the laboratory expert. Kellogg Variable Condensers are made in the following styles: Ratio Price Code No. Zero Cap. Max. Cap. 601-11 plate Vernier .000120 .000262 2.1:1 with vernier All Plates .000120 .000600 5 :1 $6.75 602-11 plate .000045 .000396 2.8:1 4.50 603-23 plate Vernier .000071 .000210 3 :1 with vernier All Plates .000071 .000990 14 :1 7.75 604-23 plate .000071 .000885 12.6:1 5.50 605-43 plate Vernier .000102 .000250 2.4:1 with vernier All Plates .000102 .001800 17.6:1 8.75 6.50 606-43 plate .000082 .001690 20.7:1 have the best. Have your dealer furnish you with Kellogg radio equipment and know you cAll Kellogg Radio Parts are manufactured and guaranteed by Kellogg Switchboard & Supply Company CHICAGO, ILLINOIS CAL. PORTLAND, ORE. COLUMBUS, OHIO KANSAS CITY, MO. SAN FRANCISCO, Kellogg Apparatus exclusively is used in building the Symphony Receiver When writing to advertisers please mention THE WIRELESS AGE 72 THE WIRELESS AGE JANUARY, 1924 According to Commander S. C. Hooper of the Washington Head- quarters, "radio changes the fleet from an unwieldy mass of ships, scouts and aircraft to a perfectly controlled com- bination of units, each fully informed 1:lerzdio and directed in order to perform its function at maximum efficiency and at the proper instant. The radio system failing, the value of information and the effective execution of plans of the Commander -in -Chief are destroyed. The apparatus, though complicated, must never fail. It must be compact for easy manipulation, selective for working through interference and of unvarying wave length so that commu- nications will not interfere with one another. No expense must be spared in providing necessary facilities." Radio Frequency Amplification (Continued from page 54) signal strength is the ideal condition of Continuous Satisfaction tuning which should be striven for, but at the same time if we do so adjust The expectations of the radio enthusiast who the receiver is endeavoring as to throw it into oscillat- to get sharp tuning in his set, ing condition are fulfilled by the continuous satisfaction of the results will not be as the Teleradio Vernier Condenser. serious in the production of external His joy in finding accuracy and dependability interference as it would be if we in this instrument did reflects the efforts of the not use any radio frequency amplifica- manufacturer to fully please the owners of Teleradio products. tion. FILAMENT RHEOSTAT With extra heavy polished hard aluminum It must be remembered that the one plates that will not warp, a special locking who is using this receiver, Is reversible and can feature or in fact, be mounted on either preventing short circuiting of vernier any receiver that is made, should not panel or base. Double and providing permanent and perfect contact, brass bearing on spin- be disappointed if the receiver does not dle insures smooth ac- an accurate and constant capacity, and with tion a n d prevents rigid construction throughout, there is posi- give its best results the first time it is looseness. Contact tive assurance of continuous satisfaction used, because it may not necessarily arm is phosphor from be bronze. Will carry this precision instrument. the fault of the receiver, and in fact, 1% amperes without Guaranteed electrically heating. and mechanically. it very seldom is the receiver's fault. Price (6or30ohm), $1 TELERADIO ENGINEERING CORP. The first thing that the broadcast 488 Broome Street New York City listener seems to think after he sits down at his receiver and it fails to VERNIER CONDENSERS, 23 plate, $4.50; 43 plate, $5.50; DENSERS: 3 VARIABLE CON- function in what he considers plate, $2.00; 11 plate, $2.50; 23 plate, $3.00; 43 plate, $4.00. HEAD to be a PHONES: 2000 ohm, $5.50; 2200 ohm, $6.00; 3000 ohm, ARRESTER, $1.00. $7.00. LIGHTNING proper manner is that there is some trouble with the receiver. With a home-made affair it is quite posible TE'LERADIO PRODUCTS that the trouble is in the receiver, but with an outfit constructed by a reliable manufacturer this is very seldom the case. The usual trouble lies in the lack of knowledge of the proper manner in which to operate the receiver. For ex- TELEGRAPH INSTRUMENTS ample, let us look Dandy at some parallel Morse Learner's Outfit cases in other mechanical lines. How does an autoist learn to successfully operate his automobile ? It most cer- C 11. RECTQIER tainly is not by merely Patent ending learning how to THE PERFECT SYNTHETIC CRYSTAL DETECTOR shift gears and how to operate the SENSITIVE OVER ENTIRE SURFACE self- No Hunting for "Spots." Loud and Clear. starter. It is only after months of ex- Endorsed by Thousands of Satisfied Users. SENSITIVENESS Price perience with his automobile is GUARANTEED that he One dry cell 1s all that is required to operate this Mounted.... 5 immediately Instrument. 14 K. Gold Supersensitive able to tell what is the Made by the best Telegraph Instrument Makers RUSONITE CATWHISKER, World. in the Prioe..0+0 trouble if there is some slight sound Permanent. Will Not Oxidize. eeJJ Other types carried in stock. coming Send stamp for Telegraph Manual No. 43W. RUSONITE REFLEX CRYSTAL from its interior which he has Instrument only Manufactured Expressly for Reflex Circuits. With dry battery $5.00 Will Stand Up Under Heavy Plate Voltage never heard before. In other words 5.50 Prim Special Price to Dealers GUARANTEED Mounted..,'i.' it is experience which enables him to J. H. BUNNELL & CO. 32 Park Place, N. Y. C. MAOV Order from Your Dealer or Direct From run his car with any degree of success. RUSONITE PRODUCTS CORP. IS PARK ROW, NEW YORK, N. Y. How is it that the railway engineer When writing to advertisers please mention THE WIRELESS AGE N("ARV, 1924 THE WIRELESS AGE 73 JØORDAR SON KENNEDY Jh.e c12oyacty f c12adio The Colin B. Kennedy Co., internationally renowned for their QUALITY RECEIV- ING SETS, are equip- ping all their sets with Thordarson super - transformers. 0 N V N coF The Zenith Radio Corporation, manufacturers of LON G DISTANCE RADIO RE- CEIVERS, famous for the Berengaria record and their accomplishments on the S. S. Bowdoin at the North Pole, also have adopted Thordarson super -transformers as standard equipment. sUPER TRARSPORHER THOIJ?SON TRANSFORMERS FOR EVERY PURPOSE 500 W. HURON ST., COR. KINGSBURY CHICAGO When writing to advertisers please mention THE WIRELESS AGE 74 THE WIRELESS AGE JANUARY, 1924 upon hearing some uncommon sound coming from the interior of the very complicated mechanism which he con- trols is immediately able to judge as to the seat of the trouble and remedy it before disaster results ? Experience, is the answer. Therefore if your re- ceiver does not operate satisfactorily the first time you work it bear in mind that it is probably owing to some fault of your own, and that there is nothing wrong with the receiver for it was de- signed by a man who knew his business and that in addition it was not the first receiver which that particular company constructed. Therefore if trouble is experienced have a little patience and remember, "It is a poor workman who blames his tools," as an old and very true saying has it. In the final series of tests a regener- ative receiver was used using the so- called Reinartz adaptation which had been constructed by two students at the Radio Institute of America. The set-up for this test is shown in figure 9. Figure 10 gives the diagram of con- nections of this set which was included because it has been stated so many times and in so many places that it wai. impossible to use this circuit with radio frequency amplification. It was con- siderably worth while to explode that bubble once for all by giving the cir- cuit and photographs of the set-up as actually used. In this circuit as well as with all of the other circuits which were made use of in these tests it was found possible to have excellent con- HAd1OdyNE trol of the regeneration by the opera- tion of the usual regenerative controls of the receivers and that the various "The Voice of the Nation" tuning elements functioned as well NO LOOPS NO ANTENNA when used with the radio frequency The RADIODYNE is operated by simply grounding to a water pipe or units as without it. radiator, and throwing a few feet of wire on the floor. No outside antenna, or loop is necessary. Uses any standard tubes-dry cell or storage battery. Extremely selective. Simple to operate-only two controls. Stations within a radius of 2000 miles can be picked up on the loud speaker; any wavelength front 200 to 700 meters. Speech Amplifier Price $150.00 (Continued from page 64) Write for illustrated folder which describes the RADIODYNE in detail. the distance between the grid and thr WESTERN COIL & ELECTRICAL CO. plate end and when the set is in opera- 5th Street Racine, Wisconsin tion the exact point for this ground tap can be found by adjusting it to give minimum plate current with max- imum oscillatory current. This circuit is coupled, very loosely, from the high E19-100 potential side to the high side of the PAGES The Little CATALOG FREE UL -1008, .06 mh. antenna coil. The Wonder capacity of this coupling condenser The smallest, yet most efficient Transformer EVERYTHING IN RADIO should be approximately .00002 mfd. ever made. Maximum One of the largest complete stocks reproduction value, in the and can be made of two copper discs minimum distortion, world. 40 diagrams of latest Hookups. 100% shielded. about 12 inches in diameter supported PREMIER DEALERS ALL OVER THE U.S. on adjustable insulated stands so that "HEGEHOG" Making big profits handling our supplies. 24 -hour they can be moved closer together or Trade Mark service. Goods shipped same day order received. AUDIO TRANSFORMER farther apart to increase or decrease unts anywhere-save space to assembl . We arantee t uncon tonally. Try them in your the capacity to get the proper amount "hkp" Ratio 1 to 3, 1 to 4, 1 to 5, of coupling. 50; 1 to 10, $4.50. Ask your dealer. Write bullttNe n o. 92. ANTENNA CIRCUIT rºmiºr Elºrfrir J WHOLESALE RADIO DISTRIBUTORS The antenna is connected to the an- ampant09 Ravenswood Ave. Chicago Dept. U 6 West 14th St. K City, Mo. tenna coil through a UC -1015, .0005 When writing to advertisers please mention THE WIRELESS AGE JANUARY, 1924 THE WIRELESS AGE 75 WHOLESALE DISTRIBUTORS FOR Radiolos and Radiotrons Radio Corporation of America Sales Dept., Suite 2066: 233 Broadway, New York District Saks Offices: Cal. 10 South LaSalle St., Chicago, Ill. 433 California St., San Francisco, ILLINOIS NEW JERSEY NEW YORK Complete Radio Supplies NATIONAL LIGHT AND LANDAY BROS. ELECTRIC COMPANY A Complete Stock of R. C. A. Merchan- LYON HEALY dise Always on Co-operative Merchandisers Hand 311 Sixth Avenue, New York Visit Our Model Store 289-291 MARKET STREET Retailed at the 7 Landay Stores 245 So. Wabash Ave. Chicago NEWARK, N. J. NORTH CAROLINA TUSCOLA RADIO SUPPLY RADIO DISTRIBUTING SOUTHERN RADIO CORP'N STATION The South's Largest Exclusive COMPANY Radio Company Dependable Radio Apparatus Guaranteed Radio for Every Purpose Located in "The Radio Center of the South" TUSCOLA ILLINOIS 8 WEST PARK STREET NEWARK, NEW JERSEY CHARLOTTE, N. C. MAINE OHIO THE MILNOR ELECTRIC TRI -CITY ELECTRIC CO. COMPANY 52-56 Lafayette Street Large Stocks-Quick Service tag GOVERNMENT SQUARE NEWARK, N. J. CINCINNATI, OHIO MARYLAND NEW YORK PENNSYLVANIA Special Service to CONTINENTAL RADIO General Radio Dealers on Radio Cor- JOS. M. ZAMO I SK I CO. AND ELECTRIC CORP'N poration of America Corporation Products, in Pennsyl- House New York's Leading Radio 1 vania, New Jersey, 19 NORTH LIBERTY STREET oth and Cherry Sts. Philadelphia Delaware, Maryland, MARYLAND 15 WARREN STREET District of Columbia, BALTIMORE, 8o6 Penn Ave. Virginia and West NEW YORK Pittsburgh Virginia. MASSACHUSETTS CO., Inc. ATLANTIC RADIO CO., Inc. TIMES APPLIANCE ,o-gar®raaoosc r.rrswaaa,tnenw Approved Radio Merchandise WHOLESALE EXCLUSIVELY Complete Service Only Wholesale Hommel's Illustrated Encyclopedia of Radio tuApparatus 235 E will be sent free to dealers. 145 WEST 45th ST. NEW YORK 727 Boylston St. Boston, Mass. We sell to no others. MINNESOTA STERLING ELECTRIC PENN ELECTR I CAL COMPANY DEALERS ENGINEERING CO.. Here Westinghouse Agent Jobbers MINNEAPOLIS, MINN. you will find the SCRANTON, PA. MISSOURI R. C. A. DISTRIBUTOR WESTERN RADIO CO. who can serve you THE PHILADELPHIA ELECTRIC Dependable Merchandise from best COMPANY SUPPLY DEPT. America's Greatest Manufacturers 130-32 So. Eleventh St. BALTIMORE AT FOURTEENTH Tie up to him Philadelphia F , KANSAS CITY, MO. When writing to advertisers please mention THE WIRELESS AGE 76 THE WIRELESS AGE JANUARY, 1924 mfd. condenser and the ground is con- nected to the other end of the coil through a 0 -10 -ampere radio fre- quency ammeter. Now the circuit is complete, and with the oscillatory adjusted to give maximum radiation and highest effi- ciency we can apply the speech ampli- fier and note how it functions. FUNCTIONING OF THE CIRCUIT FOR PHONE WORK Now we come to the question of the switches A, B, C, D and E. For phone work we have the following conditions as shown by the chart in figure 1 : A closed ; B open ; C closed ; D open ; E closed. Modern Replacement This also seems to be the proper time to explain how the bias on the For Fixed and UV -203 modulator tube is adjusted by Variable means of the 5000 -ohm potentiometer. Condensers We already have good quality speech coming from the output of the speech amplifier and in order to put this good The GREWOL quality on the air it is necessary to Yari-Grd have the modulator grid biased by the Used as an 11 or 23 Plate Vernier Condenser as well as proper amount. If is a D.C. po- a variable grid there control. tential of 300 volts on the The capacity plate of the of the grid of your tube must be varied speech amplifier then, since the to secure maximum efficiency, distance, clearness and poten- sharp tuning. This is the purpose of the Grewol vari - tiometer is directly across the D.C. grid. supply, point x is negative and point Equipped with grid leak, removable when Vari -Grid is y is at plus 300 volts. Now, since E used as vernier condenser in other circuits than the grid. is closed to ground as well as the fila- Costs less! One hole to drill 13" in diameter. An efficient quality instrument. Write for ment of the modulator, these two descriptive booklet. points being at the same notential, GREWOL Fixed Detector electrically they are the same, so we Positive, sensitive adjustment ALWAYS, instead of will consider point E the modulator -ontinual guessing and adjusting. Therefore, pre- filament. Also, since point x is con- ferred for all reflex and other super -sensitive circuits. Price Glass -enclosed, solid mounting (vibration -proof). nected to the modulator grid we can Adds to the appearance of your set, imitated but never equaled. Each detector equipped with Special $2.00 call it the grip point. Therefore, if Reflex Crystal, guaranteed not to burn out. Others we had the pointer of the potentiom- cost more but none give better satisfaction. Write for New Reflex Hookup Free. eter E at point x, E and x would be at the same potential, thus, the filament Both of These GREWOIi. Products At Your and the grid of the modulator would Dealers or Direct Up-bn Receipt of Price (Actual Size) be at the same potential. Now if we moved the pointer E toward y to a RANDEL WIRELESS CO. point at plus 10 volts, for instance, we 3 Central Avenue would have the p-round or filament at Newark, N. J. a point 10 volts higher than the grid ; Jobbers and Dealers! Write for Proposition. or saying the same thing in dther words, we would have brought the grid to 10 volts negative with respect to the filament. We have biased the grid 10 volts and we could continue to still further bias the grid until we got 4Re. A Booklet You Will Want it at a point 300 volts below the fila- IIMOM By W. J. Merritt Garvey, of New York World's ment, but this would be unnecesary IIMMM Radio Section, Handbook of Helpful 411 Hints for = Radio Set Builders, includes tables, charts, because the tube would have blocked NMI - legends, statistics and carefully selected hook- with a negative bias far less than this. ups with diagrams and full descriptions. Read- $tG MO,N ing this interesting book we discovered Mr. The beauty of this circuit is that we Garvey recommended the FIL -KO-STAT. We bought an edition of the books and will gladly can adjust the negative bias of the A BIG FIELD send a copy anywhere at handling cost 10c. modulator while the circuit is in oper- Bea RADIO EXPERT. Make big money. Win success postpaid. in this new uncrowded field. Trained men needed. ation and can consequently get the Learn quickly, et h,.me in spare time, to con RADIO STORES CORPORATION. Ine. street, install, operate, repair, quality down to the finest point pos- maintain and sell radio egaipmen Sole International Distributors for RADIO EXPERTS EARN sible. It would be simply necessary abort course, low cost, easy to to connect a pair of telephone receivers money back guarantee. Wonderful tube receiving set of to a wavemeter or receiving set with pRele latest design. Range of over 1000 miles. Write today fur "RADIO FACTS.' the antenna disconnected-using the ta. a. Was.s4 Ma: £as. American Nadia Association FI L KOSTAT 4813 Revenswced Ave., Dept. c-1 Chloats Filament Control of Infinite Adjustment. primary coil for a pick-up-and after Dept. WA 12-218 West 34th St. New York. tuning in the speech we could adjust Mao writing to adverNura please mention THE WIRELESS AGE 77 JANUARY, 1924 THE WIRELESS AGE "It's real firn to tune -in now since Jim equipped our set with CCURATUNE Universal micrometer action and easily fingered knobs are the out- standing features of the Accuratune CONTROLS Control. The larger knob is used MICROMETER for coarse adjustments, the smaller (THERE are no more of those exasperating 'hide-and- the micrometer knob operates seek,'T preliminaries that used to try my patience so, mechanism. Either action will of waiting till swing the dial through the full 360 especially with the new wave lengths. Instead degrees. Your dealer will supply Jim comes home to fuss and fumble with the old vernier you with Micrometer Controls for things, which I never could master, I can do all the tuning, your present set, or if you are buy- ing a new set, choose one equipped now, myself. with Accuratunes. "You must not confuse the Accuratune with any of those so-called vernier attachments or 'mere dials.' It's a real Manufacturers of popular sets: Equip control ten times as accurate as any vernier and far more your apparatus with Accuratune simple to operate. Just by the slightest turn of the micrometer products. Increased efficiency and after station, clear and distinct, beauty will advance your sales. knob I can easily get station in half the time Jim formerly took. "As for the cost, Jim agrees we got $3.50 worth of pleasure and satisfaction from the Accuratune the first week we used In fact, he was so delighted with it he immediately bought it. the a Fixt-Post Switch and a set of Rheostat Dials made by Accuratune people, and which match the Micrometer Con- trols to a 'T'. The appearance of our set has been increased 100% and you can do the same with yours, too." THE MYDAR RADIO COMPANY 9-A Campbell Street, Newark, N. J. GOOD P ROD UCT EVERY ACCUR AT UNE PR O D U C T IS A AGE When writing to advertisers °lease mention THE WIRELESS 78 THE WIRELESS AGE JANUARY, 1924 the modulator bias until the quality of the speech was best. I.C.W. OPERATION For I.C.W. we have A open, which cuts out our smoothing condensers; B closed, which short circuits our 1000 - cycle trap; C open, which cuts out one kenotron and thus gives half -wave rectification or a 500 -cycle ripple ; D open and E closed which gives us our proper modulator bias for good mod- Are leaders everywhere in quality, ulation. Now, with our filter condens- ease of installing ers and our trap circuit cut out and. and utmost efficiency one kenotron out of the circuit, the 500 -cycle ripple goes through to the grid of the modulator and the high fre- quency current being radiated is modu- Genuine 1 1 Plate ... $1.50 lated by this 500 -cycle note, which is a Bakelite 2 3 Plate... 2.00 very pretty note. Insulation- 43 Plate... 3.00 C.W. OPERATION a quality 3 Plate... 1.25 product. For C.W. transmission all the switches are back to the position they had in phone transmission except D and E. D is closed and E is open, which Amplifying throws the grid of the modula- tor 300 volts negative, so far negative distortionless in fact that it blocks and refuses to Transformers, function, the result being that a pure correct for any unmodulated C.W. note is radiated. tubes. All of this switching in the speech amplifier circuit can be taken care of Price $4.00 by means of a single gang switch with five elements. An element for each The New York one of the switches, there being three Variable Grid Leak Mica Fixed Condensers positions of this gang switch, namely, Easily tops the field in phone, C.W. and I.C.W. The use of Of tested and permanent precision, permanency, the gang switch for the speech ampli- capacity, ranging from and efficiency. fier unit was the method employed by .0001 to .0006, 35c to 75c, Price, $1.50 the writer. of superior quality .00025 with Leak Our Variometers and Couplers DX Reception in the Grand Mounting, 45c are large, full size instruments- Canyon correct for complete broadcast (Continued from page 18) range. Little Colorado, and 225 miles below VARIOMETERS $3.50 180° COUPLER $4.00 the starting point of the expedition, at 90° COUPLER $3.50 Lees Ferry. Here they were met with supplies and mail and with newspapers New York Coil Company containing wild accounts of pos- 338 Pearl Street New York City, N. Y. sible disaster to the party in the big Pacific Coast-MARSHANK SALES CO., 1240 S. Main St., Los Angeles, Cal. flood. One of the accounts stated that an overturned boat marked "U. S. G. S." had been seen below Boulder Canyon, and it is true that one of the Survey's boats at Bright Angel, used in hydrographic work, broke 'loose and was carried away, but the description of the boat seen does not tally with this boat, so perhaps the boat seen was Never Before Such Radio Opportunities one of those of the U. S. Reclamation POSITIONS Service, marked "U. S. R. S." Here ASSURED the boats were overhauled, reports Radio Companies frequently find it necessary to scour the country for were prepared, the equipment was ex- licensed operators. In a number of cases ships have been held'up and in a few instances vessels have had to clear port without operators. amined, and the radio outfit repaired Delightful working conditions: -Good pay, steady employment, excellent and set up, where it received mé'ssaes opportunity for advancement. from Los 'Angeles and elsewhere, Study Radio in a recognized school. Write to -day for illustrated booklet. among theta the broadcast telegrams Y. M. C. A. Radio School announcing the safety' of the -party. "Best Radio School in the East" The voyage was resumed October 7, 149 East 86th Street New York when the boats plunged into Diamond Creek Rapids. A- couple of the boats When writing "£ò advertisers pYëase mention THE WIRELESS AGE 79 JANUARY, 1924 THE WIRELESS AGE do do it Why you We DO You HELLO, JOE, WHATS UP - Jusr TNICrHT Do O' HELLO /LOOK MY DATTRY YOUR ELECTRIClD' A Goo? PROGRAM @WG L1 L. 5AY,11-IE AN' GOEs sOUR,,AÑ ANS CHARGE Ir ON TuO 6¡3UY! iMITH5 ARE O ! GosH-- NOW I'LL HAUE il YOURSELF-HOME-- No souND-No JUICE CoM I N' T'WG IT our wp.ltN A TUNGAR OVER TNIGFIi AND HERE THEY TOGEtIr COME ! ' I I ECNARGEDI (3ur' L155EN JOE TUNGAR CHARGES z OVER NIGHT Is your battery always fully charged and fit ? Is it always toned up for best results whenever friends happen in-throughout every concert ? Keep it at full strength the simple, easy, inexpensive Tungar way. to Tungar Battery Charger Tungar-the go-between from house lighting circuit Operates on Alternating Current battery-attaches wherever there is a lamp or a con- 2 Ampere Outfits complete, $18.00 5 Ampere Outfits complete, $28.00 venience outlet. (Prices east of the Rockies) You don't have to move the battery. Just connect Special attachment for charging 12 or it, any time day 24 cell "B" Storage Battery-$3.00 Tungar, turn on the current and leave -fits either size Tungar. or night. Tungar is certain, clean, quiet. There are no moving parts to get out of order or make noise. Its cost of operation is low. Regular charging with Tungar keeps the battery in the pink of condition for every concert and prolongs its life. Good for the auto battery too-the same Tungar. bee one at any good electrical shop, or write for litera- ture. Address Section WA -1. Merchandise Department General Electric Company Bridgeport, Connecticut. Charge 'cm at Home, with ar BATTERY CHARGER A GENERAL ELECTRIC PRODUCT When writing to advertisers please mention THE WIRELESS AGE 4O THE WIRELESS AGE JANUARY, 1924 were upturned, but without serious accident to the party or to the appa- ratus, although many loose articles such as glasses, pipes, etc., were Impartial Experts Testify! lost. The accident afforded a good For a long time, set builders have wanted some definite, test of authoritative the serviceability of the water -tight guide to condenser quality. Complying with this demand, HEATH RADIANT CONDENSERS boxes, one of which, containing cam- were submitted to two of the greatest eras, was strapped radio testing laboratories. Below are in the open cockpit salient phrases from their of the overturned boat. After reports. Copies of the complete reports free to anyone interested. a half- hour's submersion the cameras and films were found to be bone-dry. In Electrical Testing camp that night the repaired radio sct gave the party messages from Los Laboratories of Angeles and Salt Lake City, and, for the first time, from Colorado Springs. New York Say- The most interesting items of news were accounts of the results of the ". , . the equivalent series re- first sistance two baseball games in the world's of each of the con- series. densers is very small. That is, it is so small that it may be October 19 the party .,reached considered as negligible." Needles, 450 miles from Lees Ferry, bringing to an end one of the most re- markable surveying expeditions of all Radio News time. Laboratories Says The ease with which the party picked up broadcasting from distant . considered one of the points is all the more remarkable, not best condensers we have only because of the great depths of tested. A dielectric loss resis- the canyon, but also on account of fre- tance of 46 ohms at 1000 quent "dry" thunderstorms in August and cycles . . ." September. Colonel Birdseye stated that al- though Los Angeles and San Fran- HEATH RADIANT CONDENSERS cisco were never less than 400 or more Permanently Flat miles away, it was seldom necessary Plates Micrometer - Adjusting to use the Precise, when you examine it at the second stage of amplifica- store and, Geared still more important, p -r -e -c -i -s -e Vernier tion to hear stations in those cities always, for years-the most durable, con- Reducing gear, engaging with teeth cut plainly. Yet, all tinuously efficient part of your set. Warp- into the outer rim of the vernier plate, this broadcasting was ing plates made impossible by the Heath affords infinitely delicate adjustment. An heard when the receiving set was from process of stamping added feature of satisfaction that makes it and hardening which well worth a thousand to five makes each one permanently FLAT. your while insisting upon Heath thousand feet below Radiant Condensers. the rim of the canyon. Write for Booklet The party, which was selected with List especial Prices-Vernier Type-(With 2 %t" dial and knob) care, consisted of well -sea- 13 soned, experienced Plate $5.e 25 Plate $5.53 45 Plate $6.so men, comprising, besides Colonel Birdseye, E. C. LaRue, HEATH hydraulic engineer, who for several RADIO & ELEC. MFG. CO. years has been studying 203 FIRST the problem STREET NEWARK, N. J. of utilizing the waters of the Colorado River; R. C. Moore, State Geologist 1 of Kansas, who for two years has been making geological investigations in Utah and Arizona ; R. W. Burchard, topographic engineer; Emery C. Kolb of Grand Canyon, who in 1911, with his brother, made a boat trip from Green River, Wyo., through the ÑA -A p Grand Canyon to the Gulf of Cali- fornia; . L. R. Freeman of Pasadena, DE LUXE DIALS EMPIRE Calif., a well-known When phonographs were first explorer, writer made they were square boxes and boatman; without ornamentation. Like- OILED TUBING Leigh Lint of Weiser, wise the first dlals,-turned Idaho, and H. E. Blake, Jr. out in a laboratory, had hard To banish those mysterious noises of Monti- straight lines for shape. Beau- cello, Utah, two husky youngsters ty Is a later development. Na - and shorts in radio sets use Empire with aid dials have soft, graceful Oiled two years' experience lines which make them very Tubing, sometimes called in boating the pleasing to the eye. They "Spaghetti." rapids of the lead in both beauty and Qual- Colorado; Frank B. ity. They have the right grip Dodge of Honolulu, a for delicate, exact tuning. MICA skillful boat- Alden Manufacturing Company INSULATOR CO. man, Largest expert swimmer and general util- makers of Radio sock- 68 Church St. 542 So. Dearborn St. ets and dials In the world. New York ity man, capable of filling any position Springfield, Mass. No. 3003-4 3 In. Chicago Dept. A 52 Willow Street. 35e., 3 for 51.00 Works: Schenectady, N. Y. 2030-F from instrument man to cook, and a cook. When writing to advertisers please mention THE WIRELESS AGE AGE 81 JANUARY, 1924 THE WIRELESS UMW CONTINENTAL "Yow YOrks L'eaaing Raaio House" THE SYMBOL OF SERVICE Radiola VII "The Radiola Pathfinder" for the Radio Distributors VII is made up of two stages of Corporation of America The Radiola transformer -coupled Radio frequency amplifica- tion, detector, and two stages of audio frequency amplification. It is a two circuit Tuner designed for use with Radiotron UV -199 dry cell tubes, entirely self con- tained in a mahogany box with piano-hinged lid. It is simple to operate yet very selective in tuning. Economy and efficiency are only two of the many advantages which the Radiola VII has over other sets of today. Write for further information 2060Q CONTINENTAL RADIO & ELECTRIC CORPN. New York, U. S. A. 6 and 15 Warren Street The unexcelled performance of Federal Standard Radio Products is the audible evidence of the fine Aera1 material and engineering skill which go into every Federal part. And the HEAD SETS Federal guarantee is insurance of satisfaction to every Federal pur- are used by Radio Experts because they chaser. are Federal Standard Federal Head Sets are one of the more than 130 radio prod- ucts which Federal manu- Price factures and guarantees. Your receiving set is no better than its weakest part. Insist $7.00 on Federal. 2200 OHMS ee1eral eieltpllnne & Vlegr e lt ltompani Factory: BUFFALO, N. Y. SAN FRANCISCO BOSTON PHILADELPHIA PITTSBURGH NEW YORK CHICAGO trat LONDON. ENGLAND BRIDGEBURG. CANADA StandardRADIO Products AGE When writing to advertisers please mention THE WIRELESS 82 THE WIRELESS AGE JANUARY, 1924 Wild Rodeo Warriors at WJZ Establishing a New Horizon for Radio (Continued from Page 27) it. Arms brandishing, bodies twisting and swaying, tom-tom beating a dull ferocious rhythm of concentrated pas- sion, the three howled and wailed and howled again, until even the blase switchboard operator outside left her post to see what murder was under way. The whole aspect of the affair was changed-no longer was the chief con- cern of Scott the enticing of the braves to the microphone; it was the much graver one of keeping them away from it, of removing them ere physical mutilation was performed upon the ii/che New defenseless instrument. "How - by -a - roo. C'mon !" shouted the guide, swinging an imper- MU-RAREWER5 ial arm toward the door leading from. the studio. "Hy -e -e -e -e- How -o -o -o -o- Hy -a -a - a -a -a -a -a -a-" shrieked the frenzied' HE HORIZON of the radio art extended and broadened braves unheedingly, threatening - by this new the perfection of radio reception-the more ver- "box -on -the -stick" with dire death. satile, more simply operated receiver, Mu -Rad MA--15. "Hy! C'mon ! APPLE-PIE !" Many important refinements-plug-in type radio frequency yelled Scott. transformers, Silence rent so that the MA -15 can be accommodated to any the howl filled air. future Three braves formed the .battleground changes of wave lengths or tubes, volt -meter for in- stantaneous for a bitter struggle between pie -lov- readings of "A" or "B" batteries, new type ing stomachs vernier and vengeance -thirsty dials, operated by cams to eliminate back -lash, no souls. The stomachs won. Eager other aerial than a 2 -foot loop needed, and a wave length anticipation upon their bronzed faces, switch for bringing in short wave stations. Solid mahogany childish delight sweeping aside all pas- sion, they padded cabinet, with an engraved Formica panel. docilely across the - The MA -15 antici- studio pates every possible use and requirement. to the door and their paternal. Guaranteed range, guardian Scott. 1,000 miles using -foot2 loop. And the wild and woolly West left a somewhat quavery -minded East - Another New MU -RAD to Receiver MA -17 heave huge sighs of relief and resume - Three stages of radio and two of audio frequency its civilized methods undisturbed by. amplification and detector. One tuning dial and two aborigine attacks. selecting dials, each independent of the other. Plug- in type r. f. transformers to care for changes of tube type or wave lengths. Panel -mounted volt-meter for quick reading of A and B batteries. Solid ma- hogany, Adam Brown hand -rubbed finish cabinet The Chicago Radio Show with loop fitted into top and compartment in base for "B" batteries. Guaranteed for loco miles (Continued from page 26) reception using only a i-foot loop. The four center booths were occur WRITE FOR BOOKLET AND NAME OF NEAREST DEALER pied by Kennedy, Grebe, Crosley ands Zenith. In the Kennedy booth were - i found the handsome new Kennedy. MI.I-RAD LABORATORIES, INC. I furniture models which show so well, the 808 FIFTH AVE ASBURY PARK, NEW JERSEY, present day trend of radio devel- opment. All these sets of course were - of regenerative RADIO FANS the type. In the Grebe - Pall Mall Products- booth were found all the latest Tune in on regen- station Hook Up and Description erative sets brought out by this well W E A Pr (New York) known of the famous ESSEX ONE old-timer. every Thursday at S. 50 P. M. and listen Crosley had on exhibition. the com- to a story TUBE COAST TO COAST or article selected from CIRCUIT plete Crosley and Precision regenera- HEARST'S FREE tive lines, together with a monster re- INTERNATIONAL ceiving set which required a truck for to the first 1,000 fans who send in conveyance drawn by an elephant. This la one of the moet popular weekly feature, 2c. ion the air" a stamp and the names and This set had concealed within it a,. addresses of five friends who are standard Crosley receiver with power FREE interested in Radio. amplifier and loud speaker, and when Write for Bra Copt of the Latest Radio Reprint D. It contain a Complete story from Hearst'a ESSEX MFG. CO., 119 Mulberry St. drawn through the streets of Chicago International Magazine. Addreu Radio Rditor, Hearst's International Magazine, 119 Weet 40th Newark, N. J. by the elephant attracted as- much at- Street, New York City. tention as the average circus parade. When Writing to advertisers please mention THE WIRELESS AGE AGE 83 JANUARY, 1924 THE WIRELESS on Radio Parts means Quality and Perfection Here's the HOWARD Master RHEOSTAT Micrometer, h CONTROL, well-known eadjustable rheostaous, t made. isThisthe smoothest running, and tmost teasily accurately and easily. The The single knob gives coarse or fine adjustment-instantly, brought into use at micrometer sector is carried along with the main control and can be whatever point desired. used. Careful inspection and testing Absolutely guaranteed. Highest grade materials stability in before shipment. Wire has practically a zero co -efficient, insuring perfect operation. Carrying capacity I% amps. and 40 -ohm Micrometer 6% -ohm Micrometer Rheostat, $1.50-with dial, $1.75; 25 Rheostat, $1.60. for discounts direct. Ask your dealer to show samples of our product. Jobbers write HOWARD RADIO CO., Inc. 4248 No. Western Ave., Chicago, Ill. HOW ARD up to six pairs of phones, in 1004-Accommodates parallel 1001-The standardized Rheostat, furnished and gives instantly any desired series or resistances, to fit all tubes. three connections: Plug ....Price $2.00 6% Ohm Rheostat Price $1.10 Multi Terminal Receiver Ohm Rheostat Price 1.10 25 same 40 Ohm Rheostat Price 1.10 1005-The Inductance Switches have the The switch 60 Ohm Rheostat Price 1.10 handy knob as the famous Rheostat. bronze, keyed to the with its fine blade is of finest phosphor HOWARD 1003-The Howard Potentiometer, to the desired pressure turns of constant -resistance wire, spaced to hair- knob, and when adjusted breadth accuracy, is contributing an important on the points it will not vary or come loose: share to the splendid results now being obtained 50c sets: Large Knob Inductance Switch....Price with radio -frequency Switch....Price 50e Price $1.50 Small Knob Inductance 200 Ohm Potentiometer (1" Radius) 400 Ohm Potentiometer Price 2.00 ((se HOMMtL SEWICE Ify 'Id entr radio SERVICE. ROMMEL SERVICE business << >> HOMM EL- 1 SERVICE hfOMMEL DISTRIBUTORS FOR Radio Corp , of America radio Westinghou' . eral Electric Complete stocks of strictly high grade nationally advertised Acme Atwater -Kent apparatus are constantly carried by this company to enable you to Baldwin Brandes Burgess build your radio business on the right foundation. Your success is Chelsea Cunningham sell, and your ability to Cutler-Hammer dependent largely on the products you Dubilier Fada Frost serve your customers promptly. Freshman General Radio Grebe Homecharger with the Hommel organization makes it possible Murdock Aligning yourlelf lines for you to always have access to ample stocks of the leading Remler Rhamstine of radio equipment without the necessity of tying up your working U.S. Tool Western Electra And other capital. leading manufacturers Let us show you how you can advantageously use Hom- mel Service. Write for the Hommel Encyclopedia 236-E. t Ur-P 530-534- FERNANDO ST. ` y PITTS6URGH,PENNÁ AGE When writing to advertisers please mention THE WIRELESS 84 THE WIRELESS AGE JANUARY, 1924 Zenith displayed a new line of re- generative receivers with the new three -stage amplifier in various cabinet Dr. Wm.D. Reynolds, Hyattville, Wyo. designs, the most outstanding Denver, Colo. feature May 30. 23. being the combination of the Zenith Dear Dr: receiver with the Brunswick phono- graph. In the center of the booth As to results obtained with the little Electric under a spotlight was displayed a 300 - Specialty Dynamotor, I am pleased to say i have been pound cake of ice having frozen within getting wonderful results with it, but inàtead of run- it a copy of the last message received ning oft' Volt 6 battery, have been using an S Volt, from the MacMillan North Pole Ex- which gives me a high voltage of 600 Volts and, what everybody pedition, several days before the show, says, a Beautiful Tone, every card I get men- tions telling how glad MacMillan was to that a fine note I have; I have talked Fone (us- ing have Zenith radio with loop modulation) with 5SK at r'ort Worth Texas, after him which was daylight in the morning, Falconi at 5ZA Roswell New Mex. giving him entertainment, news and says my fone so QSA he can hear it 10 feet from 'ones, messages from home. The ice sur- and work him with CW way after sun rise, which is going rounding this message attracted much some; 1 work most all the Boys in Denver and they're all comment, and certainly created a crazy about my tone. 1 am More than pleased with the Dynamotor, cooler atmosphere. and any time I can be of service to you regard- The ing its action just let me know. United Manufacturing & Dis- tributing Company nearly broke up the Yours truly, show on one particular evening by shooting out from. the balcony 10,000 small toy aeroplanes. The crowd went wild in their efforts to obtain these toys and the disturbance became so great that the show management TRADE MARK finally had "ESCO" to put a stop to it. Quality d/w s Supreme In the Fansteel booth was found the ELECTRIC SPECIALTY COMPANY new Balkite Rectifier for battery charging. This new development STAMFORD, CONN , U. S. A. at- tracted much interest. H. H. Frost of Chicago, in addition to displaying the largest pair of head- phones ever built, had among the per- sonnel in his booth a highly decorated individual carrying a sign, "The Man Practical Wireless Who Never Smiles-Make Me Smile Telegraphy and Get a Pair of Frost-Fones Free." By Elmer E. Bucher From all reports the correct way to More than 90,000 copies of this book have been make the gentleman smile was to wig- ready sold-your copy is to be shipped. Price $2.25 gle your ears. In the booth of the Electrical Re- WIRELESS PRESS, 326 Broadway, New York search Laboratory, making the well known Erla reflex apparatus, was found a highly educational and an ex- tremely attractive exhibit showing the COPPERWELD ANTENNA WIRE action of the Erla reflex circuit. The IN CARTONS tubes, coils, condensers, etc., were il- lustrated in electrically lighted glass `Co99£RW£ar" "The Ideal Radio Antenna" cOPPFRWiw form; the wires connecting them being THE IDEAL RADIO ANTENNA Strongest-Most Efficient-Best Giessler tubes LEAD11 GROD WIRE of special construction. _.UN_ By ..A_ ..eNND an automatic switching arrange- Ct)IPFRt'! I t) I :Iki,1'CI.R COPPERWELD LEAD-IN AND .rés-... ment the current was thrown off and GROUND WIRE IN CARTONS Frt n.. .. lin RJn. Rn Rn., 4uóas' on these various circuits so that the onlookers could follow the course of Strong-Efficient-Durable-Inconspicuous l'rlrvArcrrvl.udi r...aw. r..,< of surrr a signal through the circuit out to the Has the Underwriters' OK loud speaker. The National Carbon Company dis- 100, 150 & 200 ft. per carton 25, 50 8 100 ft. per carton played a giant panel with meters that could be seen 100 feet away. This dis- The construction directions and Underwriters' regulations on the carton answer all questions play showed the operation of various types of tubes with various values of grid and plate SAVE TIME -BUY IT IN CARTONS batteries. The opera- tor of the apparatus talked through a Western Electric announcing system with a horn which was suspended `COPPERINEIö" above and directed immediately on the crowd in front of the booth, MADE EXCLUSIVELY making BY THE COPPER CLAD STEEL COMPANY this an extremely successful and edu- New York, N. Y. Rankin, PL (Pgh. Sub.) Chicago, Illinois San Francisco, Calif. cational exhibit. 30 Church Street Braddock Post Office 129 S. Jefferson Street 103 Rialto Building The French Battery and Carbon When writing to advertisers please mention THE WIRELESS AGE AGE 85 JANUARY, 1924 THE WIRELESS PREPARED RADIO MEASUREMENTS PACENT with PLUG and JACK SELF COMPUTING CHARTS By Ralph R. Batcher DEV ICES of determing elec- A book that is devoted entirely to simplifying the methods For Every Radio trical and geometrical constants for radio instruments and appliances. these charts is above the accuracy with which the various Requirement The accuracy of means. factors that enter in the formulas can be measured with ordinary Price $2.00 York WIRELESS PRESS, INC. 326 Broadway, New Pacent Jackset-A de luxe ac- con- cessory for making multiple e nections. Cat. No. 5240. Price, $1.75. Pacent Multi- adapter - Pro- vides one to five plug connec- tions. Cat. No. 54. Price, $1.50. n si Ballote PATENTS Pacent Duoplug -A quality APPLIED FOR plug for most particular radio battery charger users. Accommodates two pairs of phones. Special toggle feature has no vibrators, bulbs or moving All types insures positive contact. parts and is entirely noiseless terminals. No tools required. FANSTEEL Battery Charger for Cat. No. 100. Price, $1.00. BALKITE The Fansteel Balkite Radio"A" Batteries C6 volt) is an entirely is a new metal developed for based on the use of this charger. It acts as a valve, new type of rectifier, allowing current to flow into Fansteel Balkite, a new and rare metal de- the battery but not out of it. It veloped for this purpose. It is entirely is the most efficient charger through in- noiseless. It cannot deteriorate valve made, is practically It has nothing to replace, JACKS destructible, and does away use or disuse. PACENT noisy, delicate vibrators or get out of order. It cannot dis- for with adjust, There is a Pacent quality jack and fragile bulbs. charge or short circuit the battery, and every circuit. Ten styles. Nos. The Gould Storage Battery requires no attention other than an oc- 60c. to $1.00. Company is also marketing, water. It will 61-70. Prices Balkite casional filling with distilled under the Fansteel and cannot fail to operate New Catalog Patents, a complete battery and not overcharge, The as the to the battery and line cur- Additional Pacent recharging unit known when connected plug and jack de- Gould Unipower, into which rent. It is unaffected by temperature or fluc- and other radio this charger, under the name, tuations in line current.It is simple, efficient, vices "The Fansteel Balkite Recti- essentials are de- and indestructible except through abuse. scribed in the new fier," has been incorporated. the ordinary 6 volt radio"A"or Pacent Catalog No. The Fansteel Balkite Battery Charger will charge It Dept. at 3 amperes, from 110-120 AC, 60 cycle current. W-12, sent free on automobile storage battery the coupon below. 7-B complete and ready for use. Get it from your dealer, or use request. comes FANSTEEL PRODUCTS `Price, $18 Co., Inc., Pacent Electric Co., Inc. No. Chicago, Ill. York ($18.50 West of the Rockies) Enclosed please find 22 Park Place New $18. ($18.50 west of the Rockies.) Send me the Chicago, Philadelphia, Fanged Balkite Battery Sales Offices: CO., Inc. 6volt "A St. Louis, San Francisco, Minne- FANSTEEL PRODUCTS Charger for Radio Chicago, Illinois Batteries: If 1 am not entirely apolis, Washington, Jacksonville. Dept. 7-B North satisfied I will return it and you will refund my money. Dealers and Jobbers: The Fansteel Balkite Name Battery Charger does away with com- plaints and replacement troubles. Write Street for literature and discounts. Patent City State RADIO ESSENTIALS AGE When writing to advertisers please mention THE WIRELESS 86 THE WIRELESS AGE JANUARY, 1924 Company showed the fans, through a graphic push button board the "cents ELECTRAD per hour" battery cost of the various types of tubes. PRODUCTS Several C)he neutrodynes were shown, supreme including the Fada and the Garod. The Western Coil and Electric Com- The NEW Insulation pany exhibited their new Radiodyne DIODE set. Discard crystals! Use The desire of the radio fan for real the Electrad Diode in all circuits. Overcomes for- information in all phases of radio was mer difficulties with re- RADION strikingly shown flex work. Gives great- by the way they er volume, greater selec- flocked to the booth of the various pub- tivity and steadies the lishers. Needless circuit. Eliminates te- Panels to say THE WIRE- dious adjustments for LESS AGE got its share change of wave lengths. of the subscrip- A perfect detector tube. tions returned at the show. Real results. Absolutely guaranteed. It is of course impossible to give all $2 RADIO'S GREATEST the exhibitors the praise that is Socket INVENTION due 50c them, and all that can be done in writ- ing up a show of this kind is to cover the high lights which stand out from the kaleidoscope of impressions. It was a great show, and there is no question but that every exhibitor was well repaid for his expenditures both of money and of time. If progress The NEW VARIOHM along the lines of radio show atten- dance is as Double your receiving distance. great next year as it has Give the precision value of grid been during the past year, it will leak resistance your detector tube be requires. Variohm does the work impossible to find a hall big enough to of a thousand ordinary grid leaks. hold the next Resistance variations secured are Chicago Radio Show. infinitely close and gradual, not by steps and jumps. Range % to 10 megohms. Increases volume. Elim- inates circuit noises. Enables you to get distant stations clear and STATIONS WORKED distinct. Absolutely guaranteed. AND HEARD 75¢ Stations worked should be enclosed in brackets. Lists will be published in issue immediately following re- ceipt of list. Spark and C. W. sta- are easiest to tions should be arranged in separate The LEAD-IN groups. Fits right under closed window. Can be bent drill, saw, or 2CTN-J. M. Cummings, Richmond into any shape to fit Hill, N. Y. ledges. Covered with 4sb, 4ku, 4eb, 4db, 4yi, 4mb, 4na, 4qf, Svv, fire -proof insulating ma- 5ahh, 5aiu, Samh, terial which prevents engrave with 5abt, 5gm, 5kg, 5gj, 5agd, grounding of circuits on 5be, 51r, 5tj, 5kw, 5in, 6bqe, óka, 6bbc, 6p1, wet window sills. Takes 6cgp, 6cfz, 6awt, 7zu, the place 7abb, 71n, 9apf, 9ahz, of ungainly 9blg, 9bfi, 9dhg, 9ekf, porcelain tubes and holes simple tools 9cjc, 9dsw, 9bqy, 9avg, in the window sash. Al- 9ceh, 9dmj, 9bwv, 9cga, 9ck, 9dgw, 9ctr, 9ddp, ways presents a neat ap- 9dkx, 9dpc, pearance. Fitted with 9eht, 9dej, 9cgy, 9ccs, 9eky, Fahnestock clips. at home 9cog, 9com, 9bik, 9bis, 9aal. 4056 6BSR-WM. KRAUSE, Los Angeles, Cal. Can. 3bp, 4ft, 4cs, Can. 5cn, 5zav, Savo, 18 Stock Sizes 5de, 5adb, 5ah, 5go, 51r, 5sn, 5in, 5nn, Sph, 51r, 51a, 5dv, 5adb, Sfa, 5gn, 5ana, 5akn, 5yn, 5nn, All products at your dealer's, otherwise Radion Panels 5me, 5gj, 5gn, 5in, 7ks, 7aiy, 7ed, 7zo, send purchase price and you will be 7iw, 7asn, 7oe, 71w, 7qw, supplied postpaid. Mahoganite and Black 7ya, 7zz, 7wm. 6 x 101/2 6 z 14 6 z 21 7aci, 7dc, zio, 7ae, 7nt, 7aci, 7zz, 71w, 7js. 7 x 9 7 x 10 7 x 12 7xt, 7ahi, 7to, 8aah, 8bfm, 8bda, 9bez, 9apf, 7 x 14 7 x 18 7 x 7 x 24 21 9mk, 9pw, 9dqu, 9bji, 9ajg, 9dkb, Write 7 x 26 7 x 48 9bun, 9cfy, for FREE Cockaday_Diode 9 x 14 10 x 12 12 x 14 9os, 9bsp, 9dew, 9eky, 9biy, 9cte, 9cvc, 9dzy, Reges Circuit. 12 x 21 14 x 18 20 x 24 9bzi, 9ctg, 9aon, 9ba1, 9aps, 9aou, 9apa, 9zt. 9zay. Look for this stamp on every genuine 9ZT-D. C. WALLACE, RADION Minneapolis, Minn. Panel. Be- Heard during November. All districts ELECTRAD, ware of substitutes worked. Inc. and imitations. (1er), (lhx), 111, lsn, lxm, lvv, (lyb), 428-D BROADWAY lyd, lyk, lada, laja, laqi, lbcg, lbgk, lboq, American Hard Rubber (lckp), (lcmp), lcrw, lcsu, (lxaq), 2ah, NEW YORK Co. 2hx, (2gk), 2ig, 2kf, 2ku, 2pa, (2rb), 11 Mercer Street 2rk, New York 2sh, 2ts, 2wb, (2xq), 2afp, 2agb, 2ana, 2awh, 2bkq, 2bmr, 2brh, 2brb, 2brc, (2bte), 2bxp, 2hxw, 2cfb, 2cjr, 2cka, (2cqz), 2cs1, (2cxd). (2cx1), (2xaq), 3hb, 3bw, 3hg, 3hs, 3jj, 3me, When writing to advertisers please mention THE WIRELESS AGE AGE 87 JANUARY, 1924 THE WIRELESS FERBEND WALNART v MARK ìaVvTRADE G TWINS PATENT APPUED FOR Variable Grid Resistance The '1.00 Ori . hinl ave Inductance Switch Filter '1.25 must have positive sistance varying from minimum to To get distance you clears up Stops Interference! The average arrangement of maximum of six Megohms Eliminates interfering stations. contacts. signals and adds to the efficiency of Improves the selectivity of the set. twitch points is not satisfactory. Wal- Eliminates local broadcasting. the set. stations. nart inductance switch gives positive Selects between conflicting are made of highest Simplifies tuning. contacts-insuring better reception. The instruments Often increases signal strength. quality material; base is genuine Con- Reduces howling and squealing. Bakelite panel Different tubes require different grid densite-Celoron made under The WAVE TRAP is mounted on a Formica mahogany finished cabinet 6x5x6, and Variable grid re- patents. in a beautiful enhancing resistance-Walnart is a high grade instrument throughout the appearance of the most expensive sets. Dept. 504, 1249 W. Van Buren St. as, WALNART EL tIC MM. CO. Chicago, Illinois ferbe #1 Electric G. ,18 E. SOUTH WATER, ST. gcrls *' PAEPAID CHICAGO .411.0811 11.1113 WOC-TRESCO PARAGON DISTRIBUTORS Licensed Under Armstrong U. S. Patent No. 1,113,149 A long distance A REAL OPPORTUNITY -for- 1,000 mile 600 as meter range re- Colorado, New Mexico, generative tuner Idaho, Montana, Wyom- for $10.00-a d d SALES ENGINEER ing, Western Kansas and parcel post on 6 with large corporation selling Utah lbs. New circuit, essential radio accessory. startling results. Complete Lines of Stand- Cheaper than crys- Qualifications: ard Apparatus tal set. Uses any Good Personality. Age 25-30. "Perfect Write for our Price Bulletin aerial. Amplifiers Wholesale Only to match set for Technical College Training. Satisfaction" free full in Radio. your loud speakers. Circulars - Experience instructions. Willingness to Travel. The Rocky Mountain Radio Corporation Preferably Member A. R. R. L. Davenport, Iowa 1512-1516 Broadway, Denver, Colo. TRESCO Box A, WIRELESS AGE, "1 EW°YORO COLD WINTER NIGHTS Won't find you on the roof fix- ing the aerial-removing snow and sleet, exposing yourself to sickness, if you use RADIO EQUIPMENT for the fan who cares alert for improvements-if you are striving you are always on the you want to feel If set as "human" as possible-if to make your radio want- of getting the station you confident Radio Family be then the Sterling shouldment. to the rest of your introduced ou wantu cheap ANTENELLA Radio yyour foset that otherwise (No aerial or antenna needed.) if you want to add efinementstot now. parts.ngBut start to use Sterling parts A light socket plug that eliminates all would not be possible, arresters and For testing radio A & B outside wiring, lightning For charging your battery Pocket Merely plug An- Ster- batteries, Sterling For fine of cur. other inconveniences. The New Improved Meters, $1.00 to $4.00 socket and you can Rectifier, rent. Sterling Rheostats, tenella in any light ling 75erlregulation in radio in any room ofóRockies.Add enjoy the best For variocoupler connec- in the house. For better amplification, tions and panel appear - Sterling Audio and Radio Only $1.25 Amplifying Transformers, once SteSwgch12$1 Sont Now $4.00 dealers --otherwise send purchase "B" batter- At your postpaid. your in. For charging price and you will be supplied For protecting Fila- ies, Sterling "B" Battery atrum.ents, Sterling Charging Attachment, ment Meters, $4.00 and $5.00 $5.00 hasoesñman oç MFG THE STERLING Cleveland, N o 2847 Prospect Ave. 105 Seventh Ave., New York Tilil WIRELESS AGE When writing to advertisers please mention 88 THE WIRELESS AGE JANUARY, 1924 3pz, 3ur, 3vo, (3wf), 3xi, (3yp), 3abn, (3adb), 3ajd, 3aln, 3auv, 3avp, 3cfv, 4cr, 4cs, 4db, 4eb, (4f a), 4fg, 4ku, 4mb, 4qf, 4bw, (See), (5ga), 5gf, (5gj), (5gm), (5hy), 5in, 5je, 5kc, (5kk), Skp, 51r, 5mi, (5mo), Sq1, Sqw, 5sk, (5tj), (5uk), (5ur), 5we, 5wo, (Sxv), (5za), 5zg, 5zm, 5aaw, (Sabg), Sabh, (5adh), Safq, Sagj, 5ago, 5ahh, (5ahr), Saic, 5dat, 5zas, Szav, óak, 6ao, (6cu), 6fh, 6hp, (6km), 6nx, (6p1), (6ve), 6zh, 6zw, 6adp, (6ahp), 6ahu, 6ajd, 6akz, 6alk, (6a1v), 6anb, 6aoi, 6aos, (6avv), (6awt), 6bbc, 6bbu, 6bbw, 6bc1, 6bfg, 6bih, 6biq, 6bjc, óbjq, (6bpz), 6brf, 6bua, 6buq, 6bur, (6bvg), 6ebp, (6cdg), 6cfz, 6cgw, (6ckr), 6cnh, 6cwa, 6xad, 6zah, (7hg), A Practical Application (7hw), (7ih), (7ks), 71n, 71r, (7qj), Try, 7sc, (7sf), 7to, 7wm, 7wp, (7ws), 74i, of Radio Frequency (7abb), 7aea, 7ael, (7afn), (7age), 7agr. Canadian-2bn, 2cg, (Sgo), (5cn). Amplification Bowdain-(WNP). äIÌÌÌÌÌÌÏiìÌiÌiìlüüüiü -in a tried and proven circuit, a not 9EFC-THOMAS D. CUNNINGHAM, " trick " hook-up. Missouri. Columbia, laky, lapc, lasi, laur, lbdi, lbhk, 1cm, In building a radio set the use of a lcmp, lcpi, lepn, 1fb, ljt, Imo, lsn, 1pa, lsd, proper circuit is ivy, lyb, 2awf, 2cqz, 2cxl, 2kk, 2om, equally as important 2rb, 3abw, 3adv, as 3bcn, 3bdo, 3bei, 3bni, 3bnu, the employment of good parts. The 3bwt, 31p, 3me, 3su, 4ag, 4cs, 4eb, 4eq, (4ku), tuned radio 4mb, 6aak, 6agk, 6ajd, 6ajf, óaly, -6ao, 6arb, frequency circuit; with its Gaup, 6avv, 6awt, 6bbc, 6beo, 6bgy, 6bh, manifest advantages, óbjq, offers the best 6bpz, 6bgl, 6buo, 6cai, 6cbd, ócbi, 6cek, 6cff, assurance of lasting satisfaction. 6cfi, 6cfs, 6cfz, 6cgw, 6chl, 6ckp, 6cu, 6fy, 6hp, óii, 6p1, 6rm, 6ts, 6vf, 6xad, 6zr, Eisemann parts and panels enable you ózar, 7abb, 7aek, 7bj, 7cf, 7go, 7hc, 7hw, 7ks, 71w, 71y, 7nn, loh, 7qj, 7sc, 7sf, 7wm. to build a finished set having the ap- 7ze, 7zu. pearance of a factory-made product. Canadians-2cg, (3ad), 3bg, 3fc, 3gk, 3he, 3in4c1, Ready cut panels and 3yh,h, combination unit s 4cn, 4co, 4cr, 4dq,),4ers,4fn,i, cn, Save half the labor customarily involved. 5go, 9bx. Mexican- (bx) . EISE MANN MAGNETO CORPORATION 38 Thirty -Third Street Brooklyn, N. Y. RAYMOND E. GROEBE, Elizabeth, during November. N. J. Heard All C. W.-ladn, laez, lahz, lain, laja, lajt, lajx, lakr, lall, lalj, lame, lanb, laoc, larw, latj, laur, lavg, lawv, laww, lbam, lbdb, lbez, ibec, lbgm, lbhq, lbma, lbmf, lbnf, 1.bom, lboq, lbsb, lbsh, icav, lcaz, lcjr, lckn, lcmp, lcnp, lcqn, lcrw, ldqp, lxam, lar, lcg, lez, lfd, lgs, lhw, lhx, ljt, Ika, lmq, lmy, loz, irr, lum, lvg, lvv, SEND FOR CATALOG AND WIRING DIAGRAM lwi, lxu, lxz, lyk, 3aao, 3acq, 3acy, 3aec, 3afq, 3aic, 3aky, 3amw, 3arm, 3ats, 3ava, 3bda, 3bdo,, 3bdr, 3bei, 3bgc, 3bgg, 3bjd, 3b}et, 3b1c, 3bml, 3bnt, 3bnu, 3bof, 3bsb, 3bta, 3941, 3bvn, 3bwt, 3cah, 3can, 3cbz, 3ccu, 3cfv, 3oia, 3cio, 3cjn, 3as, 3av, 3bg, 3bq, 3bx, 3do, 3ds, 3eh, 3fb, 3gk, 3ii, 3iy, 3ji, 3kq, 31d, 3me, 3oq, 3ox, 3pz, 3qm, 3sg, 3su, 3tb, 3uu, 3v'w, 3wf, 3zm, 3zo, 3zs, 4ai, 4ay, 4bk, The 4bq, 4db, 4du, 4dy, 4eb, 4e1, 4eq, 4fs, 4ft, Armstrong Super - 4hr, NA -ADD 4hz, 4iu, 4jk, 4jz, 4kc, 4ku, 41j, 4mb, Regenerative Circuit 4me, 4mi, DE LUXE SOCKET 4my, 4na, 4ob, 4on, 4ou, 4qf, 4rh, T ie 5abd, 5abn, 5abt, 5aby, DeLuze laminated phosphor bronze By GEORGE J. ELTZ, Jr., E. E., 5adb, Sadh, 5afs, contacts of the Na -aid De 5agj, 5air, Saiu, Sama, Sarah, Contact Luxe Socket press firmly on A. I. E. E. Sams, Samw, both the ends and sides of Szak, Szas, Saa, Sac, Sbw, 5da, Sek, Ser, tube prongs, keeping the sur- 51v, Complete . face clean and insuring clear description of each Sfx, Sgj, 5if, 5j1, 5kg, 5kh, Skr, 51r, 5mi, reception. of Three Circuits Invented 5mo, Moulded of genuine Bakelite, by 5mw, 5nn, Sok, 5ph, 5sk, Suf, 5ui, thfe socket MAJOR E. H. - ARMSTRONG expresses the very 5uo, 5up, 5vv, 5wo, 5wx, Sza, 5zb, 5zg, highest quality in appearance 52 Pages 5zm, and workmanship. -21 Photos and Hook upe 6ajr, 6aol, 6avv, 6bbh, 6bfg, Write for "Why a Bakelite 6bih, 6cbu, 6fp, Socket" for further facts. Price $1.00 6km, 7io, 7ks, 7sf, 7sh, 7ws, 7zd, 7zu, 8aaf, Alden Manufacturing Company 8aaj, 8abd, Habe, 8acn, 8act, 8adh, Largest makers of Radio sock- 8aeg, 8afn, ets 8afu, 8agl, Na-aid DeLuxe and dials in the world. Wireless Press, Inc. 8agp, 8ahq, 8aig, 8aih, 8aje, 8ajh, Springfield, Mass. flamm, 8amr, 8amx, No. 400 Dept. A 52 Willow Street. 326 Broadway New York 8anb, 8anm, 8anq, 8ard, 8asv, 8atn, 8awl, 8awt, 8azh, 8azj, 8azo, 8bau, 8bbv, 8bci, 8bcu, 8bda, 8bfe, 8bfr, 8bgt, 8bia, When writing to advertisers please mention THE WIRELESS AGE 89 JANUARY, 1924 THE WIRELESS AGE Mr. F. E. Black, Chief Radio Officer, S. S. America-a former student of the Radio Institute of America. Men Are Needed Fits Anywhere -Smaller than a Magazine - for Positions in All Encfosed THE same range of reception Radio which you now require You may know nothing about for radio today, and yet in a few a 100 foot or longer aerial,-in- S. TOOL months be holding a position as upon by the U. radio operator-perhaps travel- finitely improved ing to places you have always Warren Radio Loop that fits into dreamed of seeing. Earning elim- CONDENSERS good pay at the same time. And a coat pocket. Interference started on a career that holds inated. Selects and tunes with `Plates Protected big future opportunities. remarkable ease and accuracy. Against Oxidization Study at Home All enclosed by Bakelite shields. YOU can't SEE the difference be- in Spare Time Four compact sizes for every pur- tween ordinary plates and the Since 1909, we have been train- Tool Con- ing the men who now hold the pose. The best known-the best plates and spacers in U. S. big jobs in radio. But there are eventually ordinary plates men today liked. densers, but not enough trained and spacers oxidize, setting up a high to keep up with the demand. fought this We have therefore prepared a Write for the name of the resistance. Our chemists Study Course that starts the plates with a coun- Home nearest Warren dealer and Bul- deterioration of with the beginnings of electric- -chemical treatment. Loss of effi- ity, and goes right through the 102. ter letin M ciency prevented by Laminated Con- most recent commercial prac- Reasons tice. This course prepares you densite-Celeron end plates. for your first-class operator's A Type for Every Set for the persistent efficiency of U. S. license. at the Best Dealers Tool Condensers. Unconditionally There Are Positions guaranteed.-Write for booklet. Type A-737 (300-700 meters) 6 for Every Trained Man inches square-non-directional $10.00 U. S. TOOL COMPANY, INC. This Institute is conducted by Type A-7236 (175-1,000 meters) 6 the Radio Corporation of inches square-non-directional 12.00 113 Mechanic St., `Newark, `11L J. America, the greatest radio or- Type B-2537 (300-700 meters) 18 ganization in the world. In inches square-directional 20.00 choosing men for ship and shore Type BL -2520 (200-18,000 me- positions, the Radio Corpora- ters) with honeycomb coil tion gives first preference, al- mounting. 18 inches square- 25.00 ways, to graduates of the Radio directional Institute. Learn more about the course and the opportunities, y -DE -CO RADIO MFG. CO. by sending for our booklet. ASBURY PARK, N. J. Dept. W Advanced Radio Course Great popular demand by the advanced student, experienced amateur and wire- less operator has led to the opening of an ADVANCED HOME STUDY 99 99 i ^l ! RADIO COURSE, specializing in C. W., I. C. W., telephone and radio measurements. Investigate! Small Ads of Big Interest Radio Institute of America (Formerly Marconi Institute) Space in this department costs only 65 cents a line Established 1909 Minimum space 7 lines Payable in advance 326 Broadway, New York City ¡Indicate by a cross X the course you arc interested in: '..,n. rn. rnt r/lt rnt tilt t if>ltl JIM Radio Institute of America, 326 Broadway, New York. COM- IN SPARE TIME LIGHTNING STRANGE BATTERY Please send me full information about MAKE $120 WEEKLY POUND. Charges- discharged batteries instantly. today, and your radio to radio opportunities Sell what the public wants-long distance Eliminates old method entirely. Gallon free RADIO COURSE pays $120 profit. agents. Lightning Co., St. Paul, Minn. COMPLETE receiving sets. Two sales weekly ADVANCED RADIO COURSE No big investment, no canvassing. Sharpe of Colorado made $955 in one month. Representa- RADIO GENERATORS -500 Volt, 100 Watt tives wanted at once. This plan is sweeping the $28.50 each. Battery Chargers $12.50-High Name name of your county. Speed Motors-Motor-Generator Sets. All Sizes. country-write today giving Penna. Address Ozarka, 854 Washington Blvd., Chicago. MOTOR SPECIALTIES CO., Crafton, When writing to advertisers please mention THE WIRELESS AGE 90 THE WIRELESS AGE JANUARY, 1924 8biq, 8biy, 8b1b, 8b1r, 8bmb, 8bmd, 8bnh, 8bnk, 8boa, 8boe, 8bqi, &bc, &ci, 8ccq, 8ccr, Clearis 8cdz, 8ced, 8cfq, 8cgb, r a SilverJ3e Í1 8cgj, 8cgo, 8chb, 8chp, ri 8cia, 8ckn, 8cic, 8cli, 8cmt, 8cmu, 8cmy, &nl, O -T ate TUBES 8coo, 8cqh, 8cqs, 8crc, 8crn, &rw, 8cse, 8csj, `l1 I Il 8cte, 8ctz, &uq, 8cuv, 8cvm, 8cwk, 8cxm, (Registered) 8cxn, 8cym, 8cyt, 8czz, 8dac, 8dal, 8daw, In your radio set assure - 8dbl, 8dbs, 8dch, 8dcy, 8dcz, 8ddc, 8ddt, 8ddq, sharp, clear, mellow tones 8dfv, 8dhs, 8dhv, 8dif, 8dig, 8dip, 8dis, 8djb, music with its delightful and- tions- thrilling modula- 8djk, 8djp, 8dki, 8dky, 8d1h, 8dyn, 8zae, 8bt, 8cc, 8do, 8dp, 8e1, 8eo, 8fu, 8gg, 8gz, 8jj, speeches without distortion, audible down to a whisper - 8kg, 8kq, 81r, 81y, 8md, 8mt, 8nb, 8nd, 8nz, and all the other joys of Radio at their best Som, 8pb, 8pd, 8p1, 8qn, 8rv, 8sf, 8te, 8tr, 8tt, 8uf, 8up, 8vy, 8wx, 8wz, 8xe, 8yn, 8zr, Three Models 8zz, 9aar, 9aau, 9ady, 9aem, 9aen, 9aet, 9agn, O. T. 1A-2 to 4 volts, 9ahq, 9ahv, 9ahy, Battery Draw .15 9ahz, 9aim, 9aiv, 9aix, amps. Price, $6.00 9ajn, 9ajv, 9amb, O. T. 9-2 to 4 volts, 9amu, 9aoa, 9aou, 9ape, Battery Draw .06 9apf, 9aps, 9aqd, 9aglc, 9arb, 9arh, 9ark, amps. Price, $6.50 9aru, O. T. Power Tube-5 volts, 9ase, 9aua, 9aus, 9avf, 9avg, 9avn, Battery Draw .25 to .35 amps. Price, $7.50 9avp, 9awd, 9awf, 9awg, 9awv, 9axt, 9ayx, 9azj, 9baf, 9bak, 9bas, 9baz, 9bbr, At your dealer or direct by mail. 8bcb, Write for complete literature. 9bdz, 9bed, 9bez, 9bff, 9bfi, 9bgt, 9biy, 9bji. 9bjr, 9bkh, 9blg, 9biy, 9bmd, Manufactured by De Forest Tel. & Tel. 9bmu, 9bna, Co. 9bnb, 9boo, 9bqj, 9bri, 9brk, Exclusively for the 9brt, 9brx, 9bry, The O -T is the only gen- 9bsh, 9bsp, 9bwa, 9bxq, 9bxt, 9byc, 9bzi, uine Silvertone Tube. O. & T. Electric Corporation 9caa, 9caj, 9cbj, 9ccn, 9ccs, 9ccv, 9cdb, 9cdj, Fully guaranteed. 1819 Broadway, Beware of imitations. New York 9cdo, 9cfi, 9cfk, 9cfy, 9cfz, 9cgu, 9chc, 9cho, High class representatives wanted. 9cja, 9cjc, 9cfi, 9ckh, 9ckp, 9ckw, 9c1n, 9c1q, 9c1z, 9cmn, 9cnv, 9col, 9csz, 9ctb, 9cte, 9ctg, 9ctu, 9cui, 9cvs, 9cwc, 9cwf, 9cxh, 9cyf, 9cyq, 9cyw, 9czs, 9daw, 9day, 9dbn, 9dbu, 9dch, 9dcp, 9dct, 9ddt, 9ddu, 9dge, 9dgi, 9dgx, 9dhg, 9dhp, 9dhq, 9dhu, 9dia, 9dih, 9dji, 9dkh, 9dkk, 9dkp, 9dlm, 9dlw, 9dnn, 9dof, CARTER "TU-WAY" Plug 9don, 9dpx, 9dqu, 9drk, 9dro, 9dsw, 9dtt, 9dvk, One to four phone connections at one time. Tipped 9dwk, 9dxc, 9dxl, 9dxn, 9dyy, 9dzs, or plain cord ends quickly attached. For 9dzu, 9dzy, any standard use with 9eak, 9ear, 9ecb, 9ecl, 9ecv, 9edo, Jack. Properly insulated; sturdily 9eea, built; will wear long and well. Now used as stand- 9efz, 9ehh, 9ehi, 9ehq, 9eif, 9eja, 9ejv, ard equipment with leading manufacturers. 9ejy, 9ekf, 9eky, 9e11, 9cr, 9ei, 9ep, 9eq, 9gs, Price 9hk, 9hz, 9ir, 9jr, 9jy, 9jz, 9kd, 9kv, 91h, 91n, 9ma, 9mm, 9pb, 9pe, 9pf, 9pw, 9qr, $ 1 00 9ub, 9ur, 9us, 9uu, I ,;.lar-ter Radio Co. 9uz, 9v-m, 9wc, 9xi, 9yy, 1802 REPUBLIc BUILDING 9zy. r..; L. :r dS ,C HICAGG 'Z. Canadians -lar, ldd, ldq, 1z1, 2am, 2au, 2be, 2bg, 2bn, 2cg, 2ct, 2hg, 2hv, 2ic, 3adn, 3adu, 3ba, 3bm, 3bq, 3bt, 3co, 3ct, 3ep, 3fc, 3fo, 3gk, 3he, 3kg, 3kp, 31w, 3ni, 3oe, 3pg, 3qs, 3sp, 3tb, 3tf, 3wg, 3xi, 3yh, 4c1. WNP. OE_ l Improve your set STANDARD with an OF AmerTran EXCELLENCE for audio Send for amplification Circular No. 1005 With all tubes -In all stages Its flat -top, distortionless The Champ - VARIOMETER No. 53 curve amplification ing on the tube constant -the amplification Approved as a Record Breaker assures a pure tone rendering of the is approximately 5 Approved because full musical scale. times the tube constant. it makes 600 Meters. Type AF -6: Approved because perfectly constructed. Turn ratio 5:1. Price $7. Approved because it has a It amplifies in one stage from 30 to 40 Ask your Electrical Dealer; genuine mahogany stator and times in the flat part of the or, sent carriage a kiln dried rotor. curve, depend- charges collect. Approved because of Fahnestock spring clip connections and non-conductive adhesive. American Transformer Company, Approved because -you'll know why when you 179 Emmet St., Newark, N. J. GET ONE FOR $3.50 Designers and bu'ders of radio transformers for over 22 years 20 Diagrams FREE With Each For sale at your dealer's -otherwise send the $3.50 di- rectly to the manufacturer and you will be supplied. G. H. FISCHER 8. CO. 2w 123 Liberty Street New York City When writing to advertisers please mention THE WIRELESS AGE 91 JANUARY, 1924 THE WIRELESS AGE /% % t % unaerstana % i/ An Introduction to Radio For the Whole Family In Two Volumes-Handy Pocket Size FREE TO YOU We want you to know "THE WIRELESS AGE" (America's oldest radio magazine) and 2 Volumes our laboratory tested text books. TO GET 3%x5 Inches we offer you this fine little Flexible ACQUAINTED ÿ Leather set of books ABSOLUTELY FREE with one F rInd to "THE WIRELESS 96Pagesll year's subscription Each Book AGE." $2.50 A YEAR (Outside U. S., 50c Price 2 Volumes extra). SAVE A DOLLAR. 0 % $1.00 0 y0 0 ANSWERS YOUR QUESTIONS-Every novice in radio always asks the same questions: What is a radio wave? What's In Them? it How long does it take to get to me How is made? VOLUME 1 from the broadcasting station? Is there any difference i between the dot and dash waves and the music waves? An Introduction to Radio for? What is a variometer? What Radio Telephony What is a condenser in Radio Trans- is the difference between a variocoupler and a loose The Various Instruments Used coupler? How are the ear phones made? What does the mitting and Receiving Outfits tube work? 0 crystal detector do? How does a vacuum VOLUME 2 What is the grid leak for? Is there any danger that my % lightning? How can I tune my Technical Terms Explained antenna will be struck by Outfits 0 set to get the loudest signals? What is the difference How to Set up Receiving between radio frequency and audio frequency? What is a Primer of the Vacuum Tube how does it differ from a rheostat? How to Set up Radio Transmitters potentiometer for and and Conventional % And scores of other questions. All are answered in this International Morse Code book. Signals Make no mistake. This is a non -technical book. All who can read English can understand it. Funny how hard it is for an expert to talk shop so everyone can under- .% stand-there are a number of good technical books, but this is the best book we have ever seen of the hardest ORDER BLANK kind to do well. An introduction to Radio. That is just what it is. Mr. WIRELESS PRESS, INC., Date (Miss or Mrs.) Reader, we take great pleasure in intro- 326 Broadway, New York. ducing Radio. After a few hours you can meet the other family and talk radio with them as you members of the I enclose $ Enter my subscription to now. can't Wireless Age" for one year and send me an ele- "The If you were sailing for France you would study "An Introduction to Radio." I also the French language-here is your free a set of mentary text book on sets for Christmas presents. book for your trip to radio land, the most fascinating want extra country ever discovered by modern science. Explore it knowingly, as thousands are now doing, with a receiving Name set and "An Introduction to Radio." Street City WIRELESS PRESS, Inc. State 326 Broadway New Subscriber D I am now an AGE NEW YORK subscriber When writing to advertisers please mention THE WIRELESS AGE 92 THE WIRELESS AGE JANUARY, 1924 Charge Your Radio or Auto Battery Overnight for a rticllel Why ho bothered with the inconvenience and expense of taking your storage battery to a service station every time it requires recharging? The GOIcDSLAL HOMIEcf Q./w 'Wc,rlc's osf Popzrl>3r ßatter.» Chargér Kv charges any AUTO, RADIO or "B" storage battery in the quickest, simplest and most efficient manner possible. Connects to any lamp socket-operates silently-requires no watching. Fully safe. automatic in operation-absolutely Beautifully finished in mahogany and gold. No danger from shock or fire-approved by Underwriters. UNQUALIFIEDLY GUARANTEED. Over 125,000 already in use. Six -ampere size for Complete all Radio, Auto and "B" storage batteries. with ammeter-no extras to buy-$18.50 ($25.00 in Canada). PATTERN No. 95 Ask your Dealer or write direct FREE, of Homcharger for free copy and List of Broadcasting Stations, Gold Seal Bulletin. RADIO gnsis on the GOLD SEAL TEST SET which appears on Nameplate t This radio and Package. No other charger test set has been de- is just as good! signed to meet the demands com- ing to us from serious experi- The Automatic Electrical Devices Co. ,119 W. Third St., Cincinnati, menters, manufacturers and Ohio, U. S. A. dealers in radio Largest Manufacturers Vibrating Rectifiers equipment and in the World. supplies, for a complete radio testing outfit. While the various ranges of readings permit making practi- cally every test necessary in con- nection with radio receiving sets, it has been particularly designed for the taking of characteristic curves of vacuum tubes. Price, $75.00 New and Enlarged Edition Send for Circular HOW TO PASS U. S. GOVERNMENT WIRELESS LICENSE EXAMINATIONS By Elmer E. Bucher 317 Questions and Answers WIRELESS PRESS, Price 75c. ORDER FROM DEALER Inc. 326 Broadway New York JEWELL ELECTRICAL INSTRUMENT CO. The Tube's the Thing! 1650 WALNUT ST. CHICAGO I e ed MYERS TUBES Guarantee Perfect Reception hear without noise or tube hiss with Myers Tubes. They give much greater amplification ; are perfect Detectors Oscillators. and They add 50% to the efficiency of your set be- cause they reduce interference. Calculation and Measurement TWO TYPES: Myers Dry Battery Tube 2% Ampere. Myers Volts- Universal operates on either 3 Dry e .00 of Inductance and Capacity Cells or storage batteries. $5.00 each. Ready for mount- By. W. H. NOTTAGE, ing. No B.Sc. sockets or extra equipment needed. In this book the radio man will find in See that you get the New Improved Myers Tubes. You will convenient form the more generally use- know them by the Silver Coating. Others are not guaranteed. ful formulas and methods of measure- ment for inductance and capacity. At your Dealer, otherwise send purchase Students will be interested in the sim- price and you troll be supplied Postpaid. plified explanation of Prof. Howe's for- mulas. Sole Manufacturers CONTENTS Calculation of Inductance-Calculation of Capacity-Measurement of Inductance -Measurement of Capacity-High Fre- Fg quency Measurements-Appliances for B. Myers (o. Use in Measuring Inductance Ltd. city-Tables-Index. and Capa- adio acuum %u6es 144 pages. Full cloth. Fully illustrated. 240 Craig Street West Montreal, Canada PRICE, $1.75 Wireless Press, 326 Broadway, New York When writing to ad'eertisers please mention THE WIRELESS AGE AGE 93 JANUARY, 1924 THE WIRELESS rx-r v-wexeettexxr_4 IMITATIONS IMITATED BUT NEVER DUPLICATED Have come and gone but the $350 FRESHMAN each CHAS. FRESHMAN CO. NEWYORK. PAT'S. PEND. Variable Resistance Leak and condenser combined is considered the BDXX is highest in STANDARD throughout the world. It is the most efficient, most dielectric strength- compact and the only leak that is entirely sealed and remains unaffected by climatic conditions. much higher than ever Where the leak is not used as a tuning instrument we recommend the Base Type. In circuits where required in radio. Per- considerable adjustment 1s required the Panel Type is preferable. fect for panels! Either Type Complete with either .00025 or .0005 Freshman Cond W$1.00 DEPENDABLE Without Condenser ,75 all new wave lengths At your dealers, otherwise send purchase price and -for bakelitell you will be supplied postpaid. -Range 150 to 600 meters, tunes in all new high wave has. Freshmanro.Inc. lengths. di1ecto.. 2ado Condenser. xeducts double selec- NEW YORK -180° type, gives (A Laminated Phenolic Con- 106 SEVENTH AVE., tivity of ordinary 90° instrument. densation Material) -Tubes of genuine grade XX bakelite wound with single green It is the only good in- silk covered wire. sulator having amazing -Angular movement of rotor strength Get on the subscription gives super selective tuning with mechanical - ease. yet readily machinable, list of -Direct flexible leads to Fahne - like metals. eliminate contact stock clips - noises of spring contacts. Tough, durable, super The -Aluminum die cast frame re- resistant. Resists water duces body capacity. For bench a n d solvents. Won't Wireless Age or panel mounting. warp. Ask any electrical VARIOMETER man to get Bakelite -Di- and you'll be sure of Write for descriptive lecto (xx grade) cut to Specifications size for you. getting your copy. Dealers write for trade prices. The Continental Fibre Co., Shamrock Manufacturing Co. Factory: Newark, Delaware 314-316 Market St. Newark, N. J. Dealer Service From: LOUD HEAD New York, 233 Broadway SPEAKER SET Chicago, 882 S. Michigan Ave. $4.50 Pittsburgh, 801 Fifth Ave. $18.50 SHAMROCK San Francisco, '75 Fremont St. FOR t.lVE Los Angeles, 411 S. Main St. Seattle, 1041 Sixth Ave., So. -eownForyE 180° VARIO -COUPLER KING OFALL VARIOMETER A complete loud speaker of superior qualities. Will repro- t`ivl iC Jre ,erae4ter e e :t :Y:t duce music or speech with no distortion. No extra batteries re- quired. Will operate at one or more stages of amplification. TUBES Comes complete with el VACUUM 6 foot cord. 24" high -14" bell-Crystaline In Wireless Communication Finish. By ELMER E. BUCHER Loud Speaker Unit with special phonograph attachment $8.00. Can The best text book on the market devoted solely be attached to any horn or phono- Valve graph arm. to the various applications of the Oscillation We are the makers of the "Royal - f one" King of All headset at $4.50. Price $2.25 Royal Electrical Laboratories THE WIRELESS PRESS, INC. Newark, N. J. Dept. WA 326 Broadway New York \Vhen writing to advertisers please mention THE WIRELESS AGE 94 THE WIRELESS AGE JANUARY, 1924 Advertisers' Index (9he choice offoremost -o- Engineers Ackerman Bros. & Co 95. for over 17 years. Adams -Morgan Co. 11 Alden Mfg. Co. 80, 88 Sold by Alien -Bradley Co. 95 all dealers American Hard Rubber Co. 86 American Radio Association 76 American Radio Mfg. Co. 74 American Transformer Co. 90 Automatic Electrical Devices Co., The 92. Bakelite Corporation 70 Brach Mfg. Co., L. S. 94 Brandes, C., Ina 6 Bristol Company, The 68 A phone plus a Bunnell & Co., J. H. 72 FIBERIONE Burgess Battery makes a beauti- Company 15 RAA><ópOTECTOR ful musical in- strument. Carter Radio Co. 90 Approved hytl'e National Continental Fibre The or Co., 82 Board Fire Underwriters Continental Radio & Elec. Corpo. 81 .Ash TOU Insurance.4gent Copper Clad Steel Co. 84 Crosley Manufacturing Co. 16 Cunningham, L.S. BRACH MEG. CO., E. T. Second Cover 11 0 Newa NewJersey 0 The highest tonal Dictograph Products Corporation quality undisturbed 1 by either metallic Dubilier Condenser Co. gg noises or distortion is best obtainable with a fiber horn. This one factor is Eisemann Magneto Corp. 88 the reason for Fibertone's popularity. Electrad, Inc. 8e Metal inIDLOERALLPaste For And the low price for such fineness Electric Specialty Co. is a sensation 84 of the radio world. Electric Storage Battery e $OLDS" The beautiful crystalline finish of the Essex Mfg. Fibertone fits it for any place where Co. 85 the finer things of the home are Fansteel Handy Tubes Products Co., Inc. 85A Every seen. Federal Electrical If Telephone & Telegraph Co. 81 Connection Needs your dealer cannot supply you, Ferbend `Solderall for Perfect Reception write direct. Electric Co. 87 The Only Convenient Fiber Products Co. Metal Solder/ FIBER 94 PRODUCTS COMPANY Fischer & Co., G. H. 36 Orange St., Bloomfield, N. J. 90 Freshman Co., Inc., Chas. 87, 93 General Electric Company 79 Radio Telephony General Radio Co. Hearst's International 89 By N. Heath Radio & Electric Mfg. Co 80 Alfred Goldsmith, Ph.D. Rommel & Co.. Ludwig 83 Howard Radio Co., Inc. The 83 only book treating the subject Jewell Elec. Instrument Co. 92 Jones. of radio telephony in all its aspects. Howard B 68 Kellogg Switch and Supply Co. 71 Kennedy 256 Pages 226 Illustrations Co., The Colin B. 4 Magnavox Co., The 13 Price $2.50 Mica Insulator Co. 80 Midwest Radio Co. 94 Multiple Electric Products Co. 10 Wireless Press, Inc. Mu -Rad Laboratories 82 Mydar Radio Co. 77 326 Broadway Myers, F. B. Co., Ltd. 92 Nassau New York. Radio Co., Inc. 94 National Carbon Co. 65 National Radio Inat. 3 Newman -Stern Co., The 95 GETS 'EM FROM New York Coil Co., Inc. 78 COAST TO COAST O. & T. Electric STATIC Corp. 99 Clearly and distinctly, too! For our users tell Omnigraph Mfg. Co., The 70 and us that Cincinnati hears Frisco, Denver hears Schenectady, New York hears Havana! Scores of Pacent Electric Co., Inc 85 long distance records were made on these instru- Pathe Phonograph and Radio Corp. 67 Interference ments last year so with the many new refinements Post Electric incorporated the result obtained now will be tar Co. 95 is reduced to better than ever. Precision Equipment Co. Third Cover Highest quality at lowest price Premier Electrio Co. a minimum This has always been the MIRACO keynote and 74 the thousands of sets now in use are a fitting Radio Corporation of America Fourth Cover tribute to MIRACO'S excellent performance. Many Radio Corporation new -improvements, such as new sockets resting on of America Distributors 75 shock absorbing pads-a refinement found only Radio Institute of America 89 Better in the most expensive eels-rheostats with multiple Radio Stores Corp., Inc. 76 resistance windings. making it possible to use Randel Wireless Reception either dry cell or storage battery tubes, and a new Co. 76 aluminum shield that prevents annoying body ca- Rocky Mt. Radio Corp. 87 pacity effects, are embodied. Royal Elec. Laboratories with the Cabinet is of solid mahogany-workmanship the 93 finest-operation extremely simple yet always de- Rusonite Products Corporation 72 pendable. Saturn NASSAU 2 tube outfit shown above $29.50 Mtg. & Sales Co., Inc. 95 4 tube outfit shown below 54.50 Shamrock Mfg. Co. 93 Write for our new bulletin today. Shaw Insulator Co. 15 Pat. Pend. Dealers-Jabbers Signal Electric Mfg. Write for our proposition quickly. Ce. 8 Price $35.00 Small Ads of Big Interest Jobbers Dealers Agents! 89 and loop. There's still some territory open-write Sterling Mfg. Co., The 87 write for or wire. Proposition TRADE MARK Teleradio Engineering Corp. 72 Thordamon 73 Eliminates Aerial and Ground Treat* Tri The Secret is in the Patented Winding -City Radio Elec. Supply Co 87 1500 MILES ON LOUD SPEAKER U. S. Tool Company, Inc 89 With 2 stages radio and Y -DE -CO Radio Mfg. Co 2 stages audio frequency amplification 89 Walnart Electric Co. 87 Write for Circular "W" Western Coil & Electrical Co T4 Manufactured by Wiener Wireless Specialty Co. 95 Wireless Press NASSAU RADIO CO., Inc. THE MIDWEST RADIO CO. 85 60 Court St. Brooklyn, N. Y. 821 Main Street, Cincinnati, Ohio Y. M. C. A. School 78 iMMBIMMEZMBIZIMMIIIMIMIIM Zenith Radio Corp. 7 When writing to advertisers please mention THE WIRELESS AGE 95 JANUARY, 1924 THE WIRELESS AGE The New "RED -HEADS" ACKERMAN RADIO HERE'S what we about "Red-Heads"-they're METALECTRIC EXTRA -ORDINARY radio receivers. We believe LOUD SPEAKER IRON they're the best re- SOLDERING ceivers on the mar- Delivered to with ket today. Superla- Complete, Operates on any electric current tives are easy to say Ready for Any Part of the simplicity, ease and efficiency of a and hard to back up. Immediate se the United Here's how we back $9.50 States. writing instrument. up ours. WE GUAR- that you'll An indestructible all - metal ANTEE For the price of a headset like "Red - Heads." a loud speaker quality product with a worth- You take no risk in you can have buying them. We'll that actually speaks for it- while guarantee. refund your money self. Not alone that, but a Accepted as the logical plus postage if you loud speaker superior to don't agree with us many of the much higher solution to radio soldering after trial. priced ones now on the "Red - Heads" are problems. the lowest priced, market. high-grade, alumin- Standing 21" high, with um - backed receivers 11" bell and made of heavy on the market. Nine metal, eliminating vibration, years of receiver ex- together with its special perience are behind loud speaking unit, this speaker their quality. reproduces voice and music far MODEL "F" beyond expectations. Finished Complete 3000 -Ohm set in plain black or brown, also with cord and head special alligator grain in black band; aluminum back; and green or black and yellow. brown -red ear caps; small, light -weight; and fine -toned. If your local dealer is unable to exquisitely sensitive supply you, send order direct to "RED -HEAD" Jr. .00 us and pay postman on delivery. Complete 2000 -Ohm set g 1015. of new design; a re- Sold on a money -back guarantee. markable production Ample Heat- workmanship and guar- Since 1915 with the same Interchangeable Tips- as on our standard Model "F". Handle always cool Pioneers In antee Ackerman Brothers Co., Radio-year THE GUARANTEE of your dealer or unite after year Money hack if after 7 days' trial you're Incorporated suivi ng te not satisfied that "Red -Heads" are the 301 West 4th Street POST ELECTRIC CO., Mfrs. achieve one BEST receivers on the market at the price. St. purpose - Radio Division, 30 E. 42nd better end NEWMAN-STERN Co. Dept. "WA" New York, N. Y. NEW YORK better ,radio The ecei sera Dept. RD, E. 12th Street, Cleveland, O. Know what they are doing in Europe - Read Radio Instruments and Measurements The WIRELESS CONTENTS of radio measurements. The fundamentals of electro- Part I. Theoretical basis Damping. WORLD and magnetism. The principles of alternating currents. Radio circuits. methods of radio measurement. Wave meters. Con- Pant II. Instruments and Sources Radio Review densers. Coils. Current measurement. Resistance measurement. Published monthly-$5.00 per year of high -frequency current. of In- Part III. Formulas and Data. Calculation of capacity. Calculation Inductance coils. High -frequency resistance. Miscel- Keep in touch with the latest ductance. Design of illustrated. laneous formulas and data. Full cloth binding, 320 pp. Fully developments on the other side PRICE $1.75 Send orders to New York WIRELESS PRESS, 326 Broadway, WIRELESS PRESS, INC. 326 BROADWAY N. Y. swimmer Retail Price $1.85 he Saturn P. P. IOc extra "Above the Ordinary" RADIO PRODUCTS Automatic Plug Phone cords connected, discon- Price nected in a moment. Pulling on List cords automatically tightens grip, lever instantly releases. No taking apart or soldering. $1 Perfect Jack Easy soldering crowfoot-off-set termi- nals with solder flux compound, nickle- REGISTERED plated rounded corner brass brackets, spring German silver blades and sterling silver PERFECT FILAMENT CONTROL contact points. LIST PRICES Beware of carbon dust imitations of the Bradleystat. No. 1 Single Circuit, Open 50c. Write Look for the name Bradleystat embossed on the por No. 2 Single Circuit, Closed 55c. Dealers for per No. 3 Double Circuit, Closed 70e. celain container. Buy a Bradleystat, today, No. 4 Single Filament control 75c. feet filament control. No. 5 Double Filament control 80c. WIENER WIRELESS Write for Folder Co. The SATURN Mfg. & Sales Co. SPECIALTY CO., Inc. Electric Controlling Apparatus 48 Beekman Street Street 21 Academy 283 Greenfield Ave. Milwaukee, Wis. New York, N. Y. Newark, N. J. Mfrs. of Graphite Rheostats for Drier 20 years When writing to advertisers please men n THE WIRELESS AGE 96 THE WIRELESS AGE FANU;Rv, 1924 Amateur Radio Stations of the United States Supplementary List brought up-to-date from December WIRELESS AGE 1 CFU Lawrence J. Keenan, 117 Otis St....Medford, Mass. 8 BDQ Clarence First District B. Maltbie, 742 Mentor Ave., Painesville, O. 1 CO W. F. Woodworth, 64 Lexington St.. 8 BHM Clarence R. Phillips, 10 Charlestown, Mass. Grand View Park. Canandaigua, N. Y. 1 AEB Huot W. Sternberg, 26 Monroe 1 CGJ Justin Peterson, 137 Ballard St., Meriden, Conn. St Saugus, Mass. 8 BIC Ralph Weaver, 823 Burr Oak Court, Kalamazoo. Mich. 1 AEC Wendell R. 1 CRC William S. Van Brocklin, Greenman, South Street...Grafton, Mass. 1036 South Street. 8 BJI E. H. Lorenson, 608 Keystone Ave Roslindale, Mass. Peckville, Pa. 1 AEW Lawrence D. Geno, Cain St Proctor, Vt. 8 BJL Van Wert Co. Radio Club, 412 Gordon 1 CS F. B. Swett, 81 Essex St Cliftondale, Maas. Ave.. 1AH Wm. E. Neff, Jr., 66 Windsor St., Waterbury, Conn. Van Wert, O. 1 CST Edward Ellis, 2 Beach Road Winthrop, Mass. 8 BJT Russell J. Mumaw, 701 1 ABU Joseph Chereskie, 19 West St Florence, Mass. Walnut Ave., Scottdale, Pa. 1 CUT Herbert R. Barnett, 15 Norwich Ave.. 8 BJY Ralph M. Cook, 588 Norton Way Bucyrus, 1 AIP Clinton L. Denault, 73 Institute Rd., Worcester, Mass. Providence. R. I. O. 8 BKC William Baker, Colfax and 1 BC D. L. Darling, 19 Maple St Greenfield, Mass. 1 DJ Arthur E. Ridley, 47 Western Ave , Prospect Ave., Winthrop. Mass. Benton Harbor, Mich. 1 BG Howard 1 DX J. Hemeon, 64 Chatham St....Lynn, Mass. Haverhill Radio Club, 24 Columbus Ave., 8 BKK Hobart College, Physics Dept., Trinity Haverhill, Mass. Hall, 1 WA Schwarzenburg, Edmund W., 18 Montgomery St., Geneva, N. Y. Lawrence, 1 DY A. V. Johnson, 137 Lawton 8 Masa. Ave Lynn, Mass. BKZ K. V. Rettstatt, 643 Howard St., So. Brownsville, Pa. 1 BIB Forrest S. Martin. Choate School, Wallingford, 1 FI Chesleigh C. Chisholm, 8 Conn. 862 E. Squantum St., BLG R. McKee Evans, 335 Jefferson St., Connellaville, Pa. 1 BJE Chas. B. Squantum, Mass. McKeen, 402 Columbus Ave., Boston, Mass. 8 BLI Daniel C. McCoy, 121534 Lee St..Charleston, 1 HA Lloyd C. Greene, 88 Somerset Ave., Winthrop, Mass. W. Va. 1 BJF John E. Roach, 71 W. Bow St Franklin, N. H. 8 BLO Raymond L. Norris, 931 Selby St. Findlay, 1BJG 1 IG Albert D. Hines, 22 Elm Street Everett, Mass. O. George E. Leaman W. Cheshire, Conn. 8 BLP John J. Healy, Jr., 125 Spruce Aye..Rochester, 1 IS Harry L. Sawyer, 795 Hancock St., Wollaston, Mass. N. Y. 1 BJI James J. Moran, 261 Church St., Marlborough, Maas. 8 BMP Albert A. Arnold, 268 James St Akron, 1 KI Louis A. Jaques, 33 Pond St Winchester, Mass. O. 1 BJL Harry C. Pierce, Summer 8 St., Lynnfield Ctr., Maas. BNB Horace Stanley, 415 Dickerson St., Charleston, W. 1 KM Herbert 0. Worthley, 44 Bryant Si...Malden. Mass. Va. 1 BJM Allen Tewksbury, Main 8 BRP Street Jackman, Maine Samuel B. Grissom, 415 Kelly Ave.. Wilkinsburg, Pa. 1 KX Richard B. Chase, 1 WO Lawrence Commeau, 52 Sandwich St., Pequawket Trail, 8 BWC Alto L. Hoover, 141 W. Main St W. Baldwin, Maine Norwalk, O. Plymouth, Mass. 8 BXD Donald W. Deem, 1505 Park Ave.Parkersburg, 1 OP Thayer H. Rousefell, W. Va. 1 BJR Robert W. Burton, Loomis 7134 Franklin St., Quincy, Mass. 8 School, Windsor, Conn. BXG Albin G. Lofback, 1719 Hancock Ave., W., 1 WM Frederick G. 1BJV Alan H. Clarke, 22 High Street Houlton, Maine Frueh, 82 Dale St E. Dedham, Mass. Detroit, Mich. 8 BXS Dominick Mustari, 766 19th St. _Niagara 1 BJX Harold M. Morse, 6 Sylvan St., W. Springfield, Mass. Falls, N. Y. 8 MX George M. Grening, 1021 Delaware St, Scranton, 1 BKP Eric Pa. G. Hook, 215 Sycamore Street, Waverly, Mass. 8 CUP E. E. Haverty, 918 Maple St....Parkersburg, W. Va. 1 BMG Edward G. Card, 204 Howe Ave Shelton, Conn. Fourth District 8 CUU Robert C. Blair, 194 Glendale St., (Portabe) 1 CAX George G. Bradley, 956 Asylum Ave., Hartford, Conn. Highland Park, Mich. 8 CXO Julius Nauta, 30 Waite St 1 CES Earl M. Bradley, 38 Church St Lynn, Mass. 4E0 Paul G. Watson, 830 E. Park Ave Savannah, Ga. Norwich, N. Y. 1 CI Frank H. Hankins, Jr., 62 Kensington Ave., 4 IK L. R. Dale, 148 Bellwood Ave Atlanta, Ga. Northampton, Maas. CHANGES 4 JO CarterElectric Co., 21 Haynes St Atlanta, Ga. OF ADDRESS 1 CO P. F. Hallock, Stearns Road Wellesley, Masa. 8 IG Frank J. 4 KR H. Holland, Rt. 1, Box 124, St. Petersburg, Fla. Riley, 1216 Addison Road. -.Cleveland. O. 1 GF Frederick W. Brown, Hamilton Park, Medford. Mass. 8 RS 4 GO W. M. Todd, Jr., 108 Oak St Atlanta, Ga. Roland F. Meng, 2484 Pingree Ave., Detroit, Mich. 1 GH Arthur W. Curran, 255 Church St., Newton, Mass. 8 AGE Walter H. Peters, 4 K R. W. Watkins, 446 N. Stockton St., Jacksonville, Fla. 330 Melwood St, Pittsburgh, Pa. 1 GJ Chas. A. Sanborn, 32 Mora St., Dorchester, Mass. 8 ALU John E. Lukasko, 1405 Orator 4 FN E. Gerald Watts, Jr., 136 S. W. 9th Ave., St., Cornett Sta., 1 GQ George T. Coombs, Green Street Castine, Me. Miami, Fla. Pittsburgh, Pa. s AMD E. L. Murrill, 2540 Collis Ave., Huntington, 1 HI 4 NX W. C. Couch, W. Va. Charles F. Silver. 40 Lyman Street.... Lynn, Mass. 343 South Side Ave., Asheville, N. C. 8 AML G. S. Whldden, 31134 Washington St., W. Lansing, Mich. 1 IW Gloucester Radio Club, Davis Wharf, Gloucester, Mass. 4 NS Marvin C. Hallowell, 5th Ave. & 19th St., 8 ANK Henry T. Miller, Box 3063, Station "A" St. Petersburg, Fla. 109% S. 6th St Coshocton, O. 1 MI Edgar F. Sutherland, 36 Armstrong St., 8 ATO Lynford C. Norton, 91 Eliot St W. 4 NF H. J. Braddy, 210 N. Franklin St Dublin, Ga. Detroit, Mich. Springfield, Mass. 8 ATM Howard Bull, 701 W. Ionia St Lansing, Mich. 1 OI John H. Tomfohrde, 19 Fenwick St., Somerville, Mass. 4 LZ W. M. Yoder, Jr., 206 S. Aspen St...Lincolmmn, Ga. 8 BOC Zanesville Radio Association, Cor. Myrtle and 4 LL Jacobs 1 PB Thomas L. O'Connell, 40 Dartmouth Ave., Lyman Earle Bassett Cedartown, Ga. St Zanesville, O. Providence, R. I. 8 BOP Alvin McBumey, 1441 Wyandotte Ave Lakewood, O. 1 PZ 1 Chas. T. Martin, Letterfine Terrace, BRR J. Lloyd Lentz, 1514 W. 9th St Lorain, Dorchester, Massa. O. 8 BSV W. L. DuBois, 19 Dove St Rochester, N. Y. 1 QM Christopher C. Curley, 138 Wilson Road, 8 CDK Henry J. Nahant, Mass. Eighth District Calderhead, 47 S. 8th St Kenmore, O. 8 DBI E. E. Seymour, 1221 Columbus Ave 1 QW Brookline High Bch., Greenough St., Brookline, Mass. Sandusky, O. 8 DIR REASSIGNED CALLS William H. Allen, 361 W. Third St...Elmira, N. Y. 1 RB Francis W. Dane, Main Street Hamilton, Mass. 1 RN Henry J. Dray, 21 Pond Street.. Hyde Park, Mass. 8 EC M. F. McDowell, 3888 Olentangy Blvd., Columbus, O. 1 TC James W. Kelly North Yarmouth, Maine 8 FIX K. C. Swanson, 47 Drullard Ave., Lancaster, N. Y. 1 UO Wesleyan University Amateur Radio Club, 8 JH Ralph Weller, 322 Bird Ave Buffalo, N. Y. Ninth District Foss House, Middletown, Conn. 8 KB G. H. Phelps, 1040 Bishop Rd., Grosse Pointe, Mich. 1 VII Ralph H. Fenner, 20 Hudson St.. Worcester, Mass. 8 OA K. A. Duerk, 1000 Wilhelm Ave Defiance, G. 9 BLY Lyoll K. Smith, 1619 N. 16th Ave., Minneapolis, Minn. 1 VZ James E. Wilcox, 658 N. Colony St., Meriden, 9 BAB Martin Conn. 8 OX Tynan D. Eckhardt, 57 Wade Ave Buffalo, N. Y. R. Williams, 1211 S. Ninth St., 1 WU Melvin H. Leach. 24 Bodwell St.. Dorchester, New Castle, Ind. Mass. 8 SG Russell Huff, 919 Virginia Park Detroit, Mich. 9 BUY Clifford W. Johnson, 1305 N. 8th St, 8 ABE Alfred K. Harvey 1634 Capouse Ave....Scranton, Pa. Independence, Nebr. 9 CRN Carl CHANGES OF ADDRESS 8 AFM Eugene B. Etchells, Spring St Yale, Mich. J. Madsen, 1329 N St Lincoln, Neb. 9 CWR Edwin L. Benton, 117 N. Sixth 8 AFQ James Walter Knapp, 81 Fayette St, Brookport, N. Y. St..La Crosse, Wise. 1 AHI Delmont R. Holbrook, 101 School Street, 9 DQG Rex G. Howell, 433 Denver St...Ft. Lupton, Cola Cliftondale, Mass. 8 AGU Albert M. Wilber, 457 Wilson St., Williamsport, Pa. 9 DRQ Jack W. Olsen, 4124 Wyoming St., Kansas City, Mo, 1 AKF Norwich Radio Club, Franklin Sq., Norwich, 8 AIS Raymond G. Pees, 229 Woodland Ave., Conneaut, O. Conn. 9 EFB Herbert J. Elle, 1615 Meade Ave Chicago, Ill, 1 8 AIE Pietro Muscari, 64 College Ave...Buckhannon, AMF Herbert C. Wirt, Bay Road, Island Creek, Mass. W. Va. 9 EKX Garland S. Dutton. 208 N. Maple St., Creston, Iowa 1 ASQ Roger A. Yuill, 17 Moraine St., Jamaica Plain, Mites. 8 ARA P. E. Rice, New Port Rd., R. F. D., Uhrichsvllle, O. 9 CGW Lorin K. Hill Fairfield, Nebr. 1 ATG James Cebik, 238 Reef Road Fairfield, Conn. 8 ALQ C. E. Callahan, Jr., 336 Magee Ave., Rochester, N. Y. 9 XAT Cutting & Washington Radio Corp., 18 Franklin Ave. Minneapolis, Minn. 1 AV Alfred E. Teachman, Pound Hill Road, 8 AOX Stuart W. Farmer 233 W. Ferry St., Buffalo, N. Y. 9 FZ Randall C. Ballard, 1202 W. Oregon St, Chicago, Ill N. Smithfield, R. I. 8 APO Eugene A. R. Fattey, F. D., No. 3, Boston, N. Y. 9 BDT David W. Ferree 1 AVW Carlton Weidenhammer, 33 Walworth, Nebr Washington Pl., 8 ARM Gilbert Anderson, 403 Jefferson St., Port Bridgeport, Conn. Clinton, O. 9 BEB Linton H. Flocken, 808 W. Church St.. Urbana, Iit 8 ATE W. A. Potter, 222 Crabs St Alpena, Mich. 9 BOL 1 BAP Alison R. Taylor, 2792 Washington St., Robert A. Prehm, 86 S. 13th St., Minneapolis, Minn. Roxbury, Mass. 8 AUA Thomas J. Lynch, 235 Donahue St Cincinnati, O. 9 CBL Marion F Reed, 1207 W. Charles St., Grand 1 HEIN James M. Smith, 12 Peace St....Providence, R. I. 8 AVC Harold W. Abell, 177 14th Ave Columbus, O. Island, Nebr. 9 CCY Leslie B. Vennard, 107 N. Main St., Wapello, Iowa 1 BT C. T. Caswell, 278 Franklin St., Framingham, Mass. 8 AVF Niles High School, Cor. Church and Arlington St., Niles, O. 9 CHW Everett M. Strout, 601 E. Jefferson St., 1 CB L. H. Daykin, 42 Winslow St....W. Everett, Mass. Valparaiso, Ind. 8 AWW Gerald A. Palmer, 102 Groveland St Oberlin, O. 1 CDE Willard Richards, 27 Outlook Ave 9 CYK Russell A. Cline, 216 W. Second St-Maryville, Mo. W. Hartford, Conn. 8 AZT B. H. Buckingham, 195 W. 11th Ave.. Columbus, O. 9 DIX Alfred H. Dangerfleld, Y. M. C. A....JoDlin, Mo. 1 CES Earl M. Bradley, Rear 38 Church St., Lynn, Mass. 8 BBP P. T. Brown, Poplar Grove Connellaville, Pa. 9 DON Ross D. Saragusa, 6517 Newgard Ave., Chicago, Ill. 1 CFL Edwin C. Smalley, 57 Nichols St....Everett, Masa 8 BCB Edward J. Kensler, 415 W. Chicago St., Sturgis, Mich. 9 DXF Robert R. Hedges, 2202 Walnut St Cairo, III. usruyezePel errs_ ENJOY REAL ENTERTAINMENT with an ASE TYPE 3C CONSOLETTE can sit right at your Radio is the ideal entertainment for the home. You vocal selections. own fireside and enjoy the World's best musical and all the same It doesn't matter where you live-Tampa or Portland-it's for the Program with. the Ace Type 3C Consolette. If you don't care family as tho by in San Francisco, the turn of a dial wafts you and your flash of a second. magic to New York, Detroit, Wichita-all in the cabinet. This set is built into a beautiful solid mahogany, wax -finished stages of amplifica- It consists of a regenerative tuner, detector and two is licensed under the tion, with built-in loud speaker. The tuning circuit method Armstrong U. S. Patent No. 1,113,149, and due to the particular of winding Crosley coils, it is exceptionally selective. making a com- It has sufficient room inside the cabinet for dry batteries, for tuning self-contained long-range receiving outfit. Phone jack plete moulded head phones; Crosley multistat; filament switch; Crosley with tubes. beautifully engraved formica panel. Uses all kinds of condenser; without An exceptionally splendid set at a remarkable price-$125.00 tubes or batteries. $20.00, and the Other Ace sets are the Ace Type V, which sells for the Ace Radio Ace Type 3B at $50.00. Ask your dealer to demonstrate Sets to you. EQUIPMENT COMPANY THE, PRECISION JR., Pres. POWEL CROSLEY, Cincinnati, Ohio 128 Vandalia Avenue Cle . r as Tour Headphones CALL in the crowd, now., Everyone can listen in with, as much joy as one man at the headphones. Here is a loud- speaker with a reproducing range so wide that it gets all the tones the high notes-and the low ones with all their overtones and partials -full and rich. With a horn so perfect that it causes no distortion, -adds no vibration of its own. And a one -finger adjustment that controls the volume, at your pleas- ure. Everything-music, speech,. sports news-clear for the crowd!' No more one-man radio sets. Everybody gets it-all! Radiola Loudspeaker Model U. Z. -1320 Price This symbol $36.50 of quality is your pro- tection ,, Corporation of America Sales Offices: Dept. 11 233 Broadway. New York Chicago, Ill. 433 California Street, San Francisco, Cal. dioloS. PAT. OFF. UDSPEAKER.