Radio broadcast .. (1922-30)

RADIO BROADCAST DECEMBER, 1927 WILLIS KINGSLEY WING, Editor KEITH HENNEY EDGAR H. FELIX Director of the Laboratory Contributing Editor Vol. XII, No. 2 Cover Design - - - - From a Design by Harvey Hopkins Dunn Frontispiece - Television Apparatus of a European Scientist 102 Television in Europe William J. Brittain 103 The March of Radio - - - An Editorial Interpretation 105 How the Radio Commission Can Set Radio "Radio Industry" Standards to Rights Why the South Has Few Stations What Can the Commission Do? The New WEAF Transmitter $100,000 to Improve Broadcasting News of the Patent Field What to Tell the Consumer—and Where The Month in Radio What Broadcasters Want Applications of the Four-Electrode Tube • Theodore H. }Ja\\en 109 The Phonograph Joins the Radio Set - ' ' • »• i la Make Your Own Radio Picture Receiver - - Austin G. Cooley 114 Beauty—The Keynote in the New Radio Receivers 118 What B Device Shall I Buy? • Howard E. Rhodes 120 Measuring the "Gain" of Your Radio Receiver Keith Henney 123 Book Reviews . , , , j^ I ^ Inventions and Patents, Wright The Story of Radio, Dunlap Loud Speakers - 126 Power Devices 127 Facts About the Fada "Special" Receiver - John F. Rider 128 Our Readers Suggest - 131 How to Improve Your Old Receiver - Edgar H. Felix 133 A Quality Five-Tube A. C. Receiver James Mil/en 135 A New "TwO'Ten" Power Amplifier William Morrison 138 The DX Listener Finds a Champion - - - John Wallace 140 "The Listeners' Point of View" As the Broadcaster Sees It Carl Dreher 142 Radio As an Electro-Medical Cure-Ail Piezo-Electric Control of Stations Some Catalogues The Small Broadcaster "Radio Broadcast's" Laboratory Data Sheets - - - - - 146 No. 145. Loud Speakers No. r49. Circuit Diagram of an A.C. Audio No. 146. B Power Device Characteristics ^ Amplifier VT ..,-, . „ No. 150. Oscillation Control No. 147. Gain No. I 5 r. Single Control No. 148. An A.C. Audio Amplifier No. 152. Speech Manufacturers' Booklets Available - - - '152 " Radio Broadcast's" Directory of Manufactured Receivers - - 154 What Kit Shall I Buy? ' - - - - - - - 170 From the Manufacturers •••'».' 174 AMONG OTHER THINGS. . . "DROBABLY the most interesting article in this issue from *- the point of view of the experimenter is the constructional data and operating and assembly instructions on the Cooley "Rayfoto" radio picture receiver. By the time this magazine is in the hands of its readers, all the essential apparatus will be available on the market and nothing will delay the experimenter in his experience in this new field. RADIO BROADCAST is glad to forward the names of readers who are interested in receiving printed matter and late bulletins to manufacturers who are supplying the various parts for the "Rayfoto" apparatus. After the appearance of Mr. Cooley's November article, a great num- ber of our readers wrote us for this information which has been supplied. A letter should at once be addressed to the undersigned, asking for additional data in case you have not already written. V\ WASHINGTON is the center of interest these days, what * * with the International Radio Conference and the changes in the Federal Radio Commission. The death of Commissioner Dillon is a great loss to radio in the United States and it will be next to impossible to fill his place. The resignation of Com- missioner Bellows removes one of the ablest members of the Commission, but President Coolidge has filled his place through the appointment of Sam Pickard, former secretary to the radio body. Mr. Pickard is a likeable and able individual and we believe his appointment is a wise one. Carl H. Butman, of Washington, was appointed as Secretary to succeed Mr. Pick- ard. Mr. Butman has long served RADIO BROADCAST as its Washington news representative and we are indeed pleased that the Commission has so wisely chosen a man who knows radio problems so well. A WORD about the authors in this issue: William J. •**• Brittain is an English writer on radio and scientific topics who has just returned from a European trip to see what is being done in television. Theodore H. Nakken is a research engineer for the Federal Telegraph Company. He is a pioneer in photo-electric cell work and is unusually familiar with radio progress abroad. Austin Cooley, whose "Rayfoto" picture apparatus has attracted national attention, is a native of the state of Washington, received his technical training at M. I. T., and except for his trip in 1916 with the MacMillan Arctic expedition, has been in New York for the past four years. John F. Rider is a well-known New York technical writer who is at work on an interesting series of "fact" articles about manu- factured receivers. T^HE next issue will contain another story about the Cooley •*• "Rayfoto" radio picture system and its operation, as well as interesting data about push-pull power amplification. An- other of Mr. Rider's articles about manufactured receivers will be featured as well as a wealth of constructional matter. — WILLIS KINGSLEY WING. Doubleday, Page & Co. MAGAZINES COUNTRY LIFE WORLD'S WORK GARDEN & HOME BUILDER KADIO BROADCAST SHORT STORIES EDUCATIONAL REVIEW LE PETIT JOURNAL KL Eco ' FRONTIER STORIES WEST WEEKLY THE AMERICAN SKETCH Doubleday, Page Or Co. BOOK SHOPS (Books of all Publishers) t LORD & TAYLOR BOOK SHOP \ PENNSYLVANIA TERMINAL (2 Shops; NEW YORK: < GRAND CENTRAL TERMINAL J 38 WALL ST. and 526 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. and 206 W. 47TH ST. CLEVELAND: HICBEE Co. SPRINGFIELD, MASS.: MEEKINS. PACKARD& WHEAT Doubleday, Page Or Co. OFFICES GARDEN CITY, N. Y NEW YORK: 285 MADISON AVENUE BOSTON: PARK SQUARE BUILDING CHICAGO: PEOPLES GAS BUILDING SANTA BARBARA, CAL. LONDON: WM. HEINEMANN LTD. TORONTO: OXFORD UNIVERSITY PRESS Doubleday, Page £r Co. 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