RADIO BROADCASTMAY, <strong>1927</strong>WILLIS K. WING, EditorKEITH HENNEYJOHN B. BRENNANDirector of the LaboratoryTechnical EditorEDGAR H. FELIX, Contributing EditorVol. XI, No. 1AMOA[G OTHER THINGS...Cover DesignFrontispieceFrom a Painting by Fred }. EdgarsThe Towers of Station WOW, at Omaha, NebraskaWith MacMillan to the Arctic-The March of <strong>Radio</strong> -What Does the Listener U'ant? Let Him SpeakQuestionnaire: Which Stations Shall Btoad'cast?Objections to the <strong>Radio</strong> LawThe Question of Vested RightsThe Electrical PhonographA Balanced Short-Wave ReceiverWhat About the A Battery?The Listeners' Point of ViewHow Long Will <strong>Radio</strong> <strong>Broadcast</strong>ing Prosper?Why a Good Program Was GoodThumb Nail ReviewsFilament Lighting from the A. C. MainsAs the <strong>Broadcast</strong>er Sees ItOne Explanation of the Plethora of <strong>Broadcast</strong>ingStations<strong>Broadcast</strong>ing and Social UpheavalsGlad Tidings From the WestAustin G. Cooley"Christian" Mud ThrowingA New Term for "A. C. Supply" UnitsThere Are no <strong>Radio</strong> EngineersA Survey of <strong>Radio</strong> ConditionsThe Month in <strong>Radio</strong>--James MillenFran\ C. JonesEdgar H. FelixJohn WallaceMicrophone MiscellanyCommunicationsWhat the Listener Likes and How He Likes ItSome Facts About Coil Design - The <strong>Radio</strong> Club of AmericaRoland F. BzersCarl DreherTechnical Operation of <strong>Broadcast</strong>ing Stations(Volume Indicators)Something About Gain ControlRoss GunnPerfecting the B Socket Power Device -Howard E. RhodesMethods of Measuring Tube Characteristics- -Keith Henney"<strong>Radio</strong> <strong>Broadcast</strong>'s" Laboratory Information SheetsNo. 89 Short-Wave CoilsNo. 93 Audio Amplifying SystemsNo. 97 Circuit Diagram of Tube Tester No. 96 Analysis of Voice FrequenciesNo. oo Loop AntennasNo. 94 The Principle of Re6exingNo. 91 A Simple Tube TesterNo. 95 Storage BatteriesEquipment for the Home ConstructorA Key to Recent <strong>Radio</strong> ArticlesInternational Short-Wave Test- -10nAn Editorial Interpretation 1526293336404346E. G. Shall{hauser 60Manufacturers' Booklets Available - - <strong>61</strong>60V\ T^TH this issue, RADIO BROADCAST starts its sixth year of* *publication. The five years just concluded have seenmany changes in the radio industry and among radio experimentersand fans. American radio magazines of to-day are quitedifferent from those of 1922; RADIO BROADCAST has changedconsiderably, both in physical appearance and in type of contents,since those days. We believe the changes are improvements,for certainly our files are filled with countless letters ofapproval. The aim of Doubleday, Page 6? Company has been topublish the highest class radio magazine possible. This we haveattempted to do, first, in setting the standard of physical appearanceof the magazine where now it is, and secondly, tospare no pains or expense in making our technical material ascompletely accurate and helpful as possible. Two large laboratoriesare maintained in Garden City where practical andtheoretical experiments are constantly under way; and our advertisingpages are carefully supervised."\ X"ANY editorial features in RADIO BROADCAST have given-" -1 the magazine a unique position in its field. The "Marchof <strong>Radio</strong>" provides an editorial comment and suggestion aboutall branches of radio. "The Listeners' Point of View" standsalone as a national review of broadcasting, particular andgeneral. "As the <strong>Broadcast</strong>er Sees It" has turned out to be aunique department (prepared, incidentally, by one of the ablestbroadcast engineers in the country) where engineer, programdirector, listener, and general reader alike, may meet. The reviewof current radio periodicals, the Laboratory Data Sheets,the listing of informative manufacturers' booklets, all furnishvaluable information for our readers. Our constructional articlesare chosen carefully for accuracy and greatest help and interestfor the reader. We are at work on an editorial schedule nowwhich holds much for everyone interested in radio in all itsbranches. Unfortunately there is insufficient space here tooutline that schedule, but we prefer to let each issue of RADIOBROADCAST speak for itself in that connection.in its tabulation of advertising lineage1 for March magazines, shows that RADIO BROADCAST ledthe field with a total of 20,621 lines, followed by <strong>Radio</strong> Newswith 18,930 lines, Popular <strong>Radio</strong> with 14,872, <strong>Radio</strong> with12,770, and <strong>Radio</strong> Age with 4395.IN THE June RADIO BROADCAST, a fine story for the homeexperimenter is scheduled, describing the construction anduse of a modulated oscillator. Other articles deal with shortwaves, the problems of series filament connection for 2OI-A typetubes, how to use new apparatus, technical problems for broadcastoperators and others, and many other features of unusualinterest.WILLIS K.WING.Doubleday, Pagefir Co.MAGAZINESCOUNTRY LIFEWORLD'S WORKGARDEN & HOME BUILDERRADIO BROADCASTSHORT STORIESEDUCATIONAL REVIEWLE PETIT JOURNALEL EcoFRONTIER STORIESWESTDoubleday, Page fir Co.BOOK SHOPS(Books of all Publishes)LORD & TAYLORNEW YORKPENNSYLVANIA TERMINAL (2 Shops)GRAND CENTRAL TERMINAL38 WALL ST. and 520 LEXINGTON AVE.848 MADISON AVE. and 166 WEST 32ND ST.ST Louis: 223 N. STH ST. and 4914 MARYLAND AVE.KANSAS CITY: 920 GRAND AVE. ana 206 W. 47TH ST.CLEVELAND: HIGBEE CoSPRINGFIELD, MASS.: MEEKINS, PACKARD & WHEATDoubleday, Page & Co.OFFICESGARDEN CITY, N. Y.NEW YORK: 285 MADISON AVE.BOSTON: PARK SQUARE BUILDINGCHICAGO: PEOPLES GAS BUILDINGSANTA BARBARA, CAL.LONDON: WM. HEINEMANN LTD.TORONTO: OXFORD UNIVERSITY PRESSDoubleday, Page 5* Co.OFFICERSF. N. DOUBLEDAY, PresidentNELSON DOUBLEDAY, ^ice-PresidentS. A. EVERITT, V'ice -PresidentRUSSELL DOUBLEDAY, SecretaryJOHN J. HESSIAN, TreasurerL. A. COMSTOCK, Assl. SecretaryL. J. McNAUGHTON, Asst. TreasurerDOUBLEDAT, 'PAGE & COMPACT, Garden &ty,Copyright, 2927, in the United Statei, Newfoundland, Great Britain, Canada, and other countries by Doubleday, PageTERMS: $4.00 a year; single copies 35 cents.Company. All rights reserved.
RADIO BROADCAST ADVERTISERfIA REALABUSE TEST; .sO many peopleruntheir batteries up too highthat, having made good<strong>Radio</strong>trons for carefulusers, RCA set about tomake <strong>Radio</strong>trons thatwould stand abuse.A year ago, an RCA<strong>Radio</strong>tron could standabout twenty hours ofrunning under too heavya current. Now it willoutlive a hundred hoursof such abuse.!Many very minutechanges brought aboutthrough laboratory studyhave effected this improvement.Ifyou have children whoare aptto turn up therheostats carelessly, ofcourse it is hard on thetubes. No tubes can beproof against ruin, but ifyou are usingRCA Raknow atdiotrons, youleast that they'll standmore than ordinary tubes.Look for that RCA mark!You'll find iton <strong>Radio</strong>tronsfor every purpose.RADIO CORPORATIONOF AMERICANew YorkChicagoSan FrinciscoThe stations are thereget them !You're not gettingthe most out of that storage batteryset of yours. The set has a bigger distance reach... all it needs is a different tube in the detectorsocket. Put in the RCA super-detector<strong>Radio</strong>tronUX-200-A. You'll get more stations getthe farawayones more regularly and more easily!small change, but itbrings big results.Bring your storage battery set up-to-date -withapower RADIOTRON ux-171 or ux-112a detector RADIOTRON ux-200-Aand RADIOTRONS ux-201-A for all-round quality.Bring your dry battery set up-to-date witha power RADIOTRON ux-120and RADIOTRONS ux-199 for all-round quality.It's aRCA-<strong>Radio</strong>tronMADE BY THE MAKERS O F T H E RADii ||1O L*
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- Page 34 and 35: AS THE BROADCASTER SEES ITDrawings
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