Radio broadcast .. (1922-30)

WILLIS KINGSLEY WING Editor KEITH HENNEY . Director of the Laboratory HOWARD E. RHODES . . Technical Editor EDGAR H. FELIX . . . Contributing Editor RADIO BROADCAST PUBLISHED FOR THE RADIO INDUSTRY VOL. XVI. NO. 3 Contents for January, 1930 - - - Edgar H. Felix - - - - Keith Henney - - - Harry P. Bridge Merchandising Kinks Unusual Advertising TyiiiB-in With Sports Cooperate With Your Theatre 130 131 132 134 Don't Give Service Away ------------ 129 What Happened in Badio in 1929? In Merchandising - - - - - In Engineering • A Service Department That Pays Tested Sales Ideas Bringing Them in Your Store Banal Wagon Advertises Radio Boosting Tube Sales Another Angle on Service ------------ 136 Professionally Speaking - - - - Keith Henney 138 What About Independent Service How the Industry Feels About Men? Radio Regarding Advertising Claims A Few Interesting Radio Pictures of the Month - - - - - A Modern Radio for the Country Home ------- The March of Radio - - - - An Editorial Interpretation Reaching the Mass Market 7J-Kilocycle Channels Proposed Cleared Channels Threatened Station Distribution Again New RCA-Victor Set Up A Radio Dealer's Tube Tester - - - James W. Blackwood How We Look at Service Problems - - - Milton B. linger "Radio Broadcast's" Engineering Review Sheets - - - - No. 27 Matching Impedances No. 28. Electrons and Tube Test- The Kinematic Remote Control - - M. B. Sleeper 149 Clippings -------- Strays From the Laboratory - - A Novel Wavemeter An International Broadcaster An Interesting Formula A Production Testing System - - Resonance and Reverberation - - The Tube Business - - - - - The Serviceman's Corner ------------ 164 A Symposium on Noise A Useful Output Meter "Radio Broadcast's" Set Data Sheets 168, 170, 172 Apex Model 36 The Majestic Model 90 Fada Models 10, 11, 30 and 31 The A.C. Dayton Navigator A Reflex Vacuum Tube Voltmeter 173 News of the Radio Industry -- -------- 174. General News Financial Notes Personal Notes Production Notes Distributors Appointed Recent Patents In the Radio Marketplace - - Offerings of Manufacturers 180 Directory of Recent Price Changes --------- 181 Radio Broadcast Laboratory Information Sheets Howard E. Rhodes 182, 184, 186 What Radio Men Say - - - Technical Shorls A *'New" Recording System Two New Booklets - - - J. A. Callanan - - Howard E. Rhodes Neirx of the Tube Industry 139 140 142 144 146 147 150 151 152 154 161 No. 310. Factors Considered in Receiver Design No. 311. Effect of Reflections and Echos No. 312. Measurements of Sensi- tivity No. 313. Fidelity in Radio Receivers No. 314. Selectivity in Radio Receivers No. 315. C-Bias Resistor Values No. 316. Range of Frequencies Required No. 317. Range of Frequencies Required No. 318. 60- and 120-cycIe Hum Measurements The contents of this magazine are indexed in The Headers' Guide to Periodical Literature, which is on lile at all public libraries . . . among other things THIS MONTH, we give over this forum to a communi- cation from the peripatetic Carl Dreher, who, having deserted the eastern seaboard, is now director of sound for RKO in Hollywood. Mr. Dreher, let it be said before we give him the floor, as author of "As the Broadcaster Sees It" was for many years a regular con- tributor to RADIO BHOADCAST. To The Editor: Although I am now in the moving picture business, I still burn with solicitude for the poor broadcasters. For the Eastern members of the fraternity 1 have no fears; except for the irreparable loss which they sustained when I left their ranks, they seem to be getting on all right. But in the West I think the boys are headed for a bad time, aside from the stock market, gassy tubes, and their sweeties running around with fellows who don't have to work at night. The California stations, I find, are laying on the ad- vertising with a trowel. Not only that, but half of it is downright fraudulent. Maybe the listeners will continue to stand for it, but one day they may rise and throw receivers out of the windows by thousands. Then the poor ops will be out of their jobs. Something had to be done and I have done it. By careful observation I discovered that the Coast an- nouncers, while they recite the virtues of the local chiropractors, second-hand clothes shops, swamis, pa- tent medicine dispensers, and other fakers, invariably use the word "folks" at least once in each sentence. I have accordingly invented a speech-operated, selective relay, known as the folkstopper. As soon as the an- nouncer says "folks" it automatically opens the an- tenna circuit. After a ten-second interval, controlled by a dashpot, the circuit closes again, but if the an- nouncer is still selling, "folks" shuts him off again. The precise form to be taken by this latest wonder of science is unimportant. I don't bother with technical details. Mr. Grace, the lecturing vice president of the American Telephone and Telegraph Company, could design an efficient folkstopper in ten minutes. He has lots more intricate and less useful machines in his bag right now. Just give him the idea; and he'll elaborate on it. You will probably object that as soon as the folk- stopper gets into extensive use the announcers will stop saying "folks". That only shows you know nothing about California announcers. They can no more stop calling,listeners "folks" than they can stop breathing. Sincerely yours, CARL DREHER. TERMS: $4.00 a year; single copies 35 cents; All rights reserved. Copyright, 1929, in Ute United Stales, Newfoundland, Great Britain, Canada, and other countries 67 DOUBLEDAY, DORAN & COMPANY, INC., Garden City, New York MAGAZINES . . . COUNTRY LITE . . WORLD'S WORK . . THE AMERICAN HOME . . RADIO BROADCAST . . SHORT STORIES . . LE PETIT JOURNAL . . EL Eco . . WEST BOOK SHOPS (Books of all Publishers) . . . NEW YORK: <LORD & TAYLOR, JAMES McCnEERY & COMPANY, PENNSYLVANIA TERMINAL, 166 WEST: 32ND ST., 848 MADISON AVE., 51 EAST 44ra STREET, 420, 526, and 819 LEXINGTON AVENUE, GRAND CENTRAL TERMINAL, 10 WALL STREET> ATLANTIC CITY: <2807 BOARDWALK> CHICAGO: <75 EAST ADAMS STHEET> ST. 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