Radio Broadcast (Nov 1926-Apr 1927)

RADIO BROADCAST MARCH, 1927 Willis K. Wing, Editor Keith Henney John B. Brennan Director of the Laboratory Technical Editor Edgar H. Felix, Contributing Editor Vol. X, No. 5 Cover Design From a Painting by Fred J. Edgars Frontispiece ' A Photograph Sent by the Alexanderson Method 458 Television: Europe or America First? ' ' ' Edgar H. Felix 459 The March of Radio ' ' ' An Editorial Interpretation 463 Radio Regulation in the Great Game of Politics Danger of Monopoly in Broadcasting The Future of Commercial Broadcasting Problems for the Radio Commission Remarkable Short' Wave Transmission The Month in Radio A High-Quality Amplifier for the R. B. "Lab" Receiver John B. Brennan Electrifying the "Hi Q" Receiver Leslie G. Biles The Listeners' Point of View John Wallace Why There Should Be More Vice in Radio Broadcast Miscellany Answers the Questionnaire Brought Forth What You Should Know About B Power-Supply Devices Edgar H. Felix Building the R. G. S. Inverse-Duplex Receiver David Grimes As the Broadcaster Sees It Carl Dreher An English Experiment in Highbrow Broadr casting The Listener Behind the Scenes Fashions in Broadcasting One Who Cannot Be Surpassed Abstract'of Technical Article, IV. The Mature of Language Curious Problem for a Broadcaster Note for Radio Historians Broadcast Station Service Data Memoirs of a Radio Engineer, XVII. A Five-Tube Non-Oscillating Receiver T. H. T^a^en Constructing an Amplifier-Power Supply Device James Millen Equipment for the Home-Constructor The Laboratory Staff A. C. as a Filament-Supply Source B. F. Miessner Book Reviews < ,; ' ■' ' . ' ' ■• r , ' ' ' ' ' . ' ' . .. «*■ Emil Berliner — Maker of the Microphone. The Weather for Radio Listeners, Broadcasters, Reviewed by John Mills and Others. Reviewed by Keith Henney Radio Broadcast's Laboratory Information Sheets ' No. 73 An A. C. Operated Power Amplifier No. 74 Resistance-Coupled Amplifiers No. 75 Interference Finder No. 76 Interference Finder (Circuit Diagram) No. 77 Interference Elimination No. 78 The Volt, Ampere, and Ohm No. 79 Regulating Voltage on B Power Suppl. Device No. 80 Characteristics of Tubes Manufacturers' Booklets Available Press, Weather, and Time Signals The Problems of A. C. Filament Lighting ' ' ' C. T. Bur\e A Key to Recent Radio Articles ' ' . E.G. Shalkjiauser The Radio Broadcast Technical Information Service ' ' ad) 467 470 473 477 480 483 487 489 493 495 498 500 510 5i4 516 520 528 AMONG OTHER THINGS. . SINCE all of our readers are not privileged to tour through Doctor Alexanderson's fascinating laboratory at Schenectady, the next best thing is to read of what one may see there. Edgar Felix's leading article gives one a very good idea of just what has been done at Schenectady. When a paper was presented at the Institute of Radio Engineers convention in January, there was some bitter discussion, all centering around the fact that the developments chronicled were not new. Into that discussion we have no desire to enter, for the important fact seems to us that a workable system has been presented which may lead to various practical applications in the immediate future. MORE information about the popular R. B. "Lab." circuit is published on page 467 and an article in April will furnish additional experimental details of this circuit which offers so much of interest to the home constructor. In the "Listeners' Point of View," some of the first results of the readers' questionnaire are detailed. They cast an interesting light on the feeling of radio listeners about radio programs. After reading more than 500 of these replies, we believe that every soprano would be wise to make immediate plans for leaving the country. Our April and May numbers will contain more material from these answers. THE many users of current-supply devices and the many more who are prospective purchasers will find the article beginning on page 477 of great interest. Our discussion of these devices should also prove of distinct aid to the radio dealer. Our remarks, while somewhat frank, are aimed to help the user and prospective purchaser and should only be interpreted for what they are, a collection of data which should make currentsupply devices more satisfactory in actual use. Those who have been waiting for constructional data on the new Grimes R. G. S. receiver will find the long-awaited article on page 480. THROUGH an omission which we greatly regret, a credit line was omitted from the frontispiece in our February issue. The photograph and the information were kindly supplied by the Westinghouse Electric & Manufacturing Company, some of whose products are used in the installation in the lighthouse mentioned. PRINTERS' IKK for January 13th shows that Radio Broadcast printed in its January number a total of 24,205 lines of advertising, being exceeded in this field only by Radio News. THE April Radio Broadcast will contain an especially interesting article on the R. B. "Lab." circuit, of particular importance to those who have already constructed the twoor four-tube models. There will be another Radio Club of America paper, dealing with loud speakers, another of James Millen's excellent articles on the use and home construction of current-supply devices, and all the usual departments, including a more complete listing of manufacturers' booklets. Ross Gunn of Yale University has submitted an unusually interesting article on coils and coil design, scheduled for April, which is well worth waiting for. — Willis K. Wing. Doubleday, Page Gr Co. MAGAZINES Country Life World's Work Garden & Home Builder Radio Broadcast Short Stories Educational Review Le Petit Journal El Eco Frontier Stories West Doubleday, Page Or Co. BOOK SHOPS (Books 0/ all Publishers) !Lord & Taylor Pennsylvania Terminal (2 Shops) Grand Central Terminal 38 Wall St. and 526 Lexington Ave. 848 Madison Ave. and 166 West 32nd St. St. Louis: 223 N. 8th St. and 4914 Maryland Ave. Kansas City: 920 Grand Ave. and 206 W. 47™ St. Cleveland: Higbee Co. Springfield, Mass.: Meekins, Packard & Wheat Doubleday, Page Sr Co. OFFICES Garden City, N. Y. New York: 285 Madison Ave. Boston: Park Square Building Chicago: Peoples Gas Building Santa Barbara, Cal. London: Wm. Heinemann Ltd. Toronto: Oxford University Press Doubleday, Page Sr Co. OFFICERS F. N. Doubleday, President Nelson Doubleday, Vice-President S. A. Everitt, Vice-President Russell Doubleday, Secretary John J. Hessian, Treasurer L. A. Comstock, Asst. Secretary L.J. McNaughton, Asst. Treasurer DOUBLED AT, 'PAGE & (^OMPA^T, Garden Qity, Hew Tor\ Copyright, 1927, in the Vnitei States, Hewfoundland, Great Britain, Canada, and other countries by Doubleday. Page & Company. All rights reserved. TERMS: $4.00 a year; single copies 35 cents. 456