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RADIO AGE for November, 192?
Established March, 1922
Volume 7
November, 1927
Number 3
CONTENTS
FOR NOVEMBER ISSUE
Page The Radio Age Short Wave Receiver 5
The Aero-Seven 8
New Improved "Nine-in-Line" 10
Camfield Super Selective Ten J 12
Quadrode Superheterodyne (With Blueprints) 14
By Frank Freimann.
Shielded Grid Tube Announced 26
Broadcasting Stations 38
BRIEF articles on further organization of the Radio Protective Association; Court Decision, Favors A. R. R. L. ; Survey of Radio Dealers' Stock made by Government.
Radio Age is published monthly by RADIO AGE Inc. Member: Audit Bureau of Circulations.
Publication Office, Mount Morris, 111.
404 North Wesley Ave. Address all communications to RADIO AGE, Inc.
Executive, Editorial and Advertising Offices 500 N. Dearborn Street, Chicago, 111.
Frederick A. Smith, Editor M. B. Smith, Business Manager
Advertising Manager Harry A. Ackerburg
tOO N. Dearborn St., Chicago, IU.
Eastern Representative HEVEY & DURKEE, 15 West 44th St., New York, N. Y.
Pacific Coast Representative CONGER & MOODY, Sharon Bldg., San Francisco, Calif. CONGER & MOODY, Higgins Bldg., Los Angeles, Calif.
Final Advertising forms close on the 20th of the 2nd month preceding date of issue
Vol. 7, No. 3. Issued monthly. Subscription price $2.50 a year. November, 1927. Entered as aecond-class matter at post office at Mount Morris, Illinois, under the Act of March 3, 1879.
Copyright, 1927, by RADIO AGE, Inc.
Chats
T^ OLLOWING our announcement in the October issue we are publishing this month the description of a superheterodyne circuit which presents absolutely new features. But aside from the unique phases of the receiver it has qualities which will be sure to make it popular. Mr. Freimann's article on this Quadrode Superheterodyne tells of the superior performance of the set when carefully tested in our laboratory and makes it clear, also, that here is an outfit that, despite its simplicity of construction and operation, measures up to the best results obtained by the more complicated superheterodynes. Set builders who have hesitated to tackle superheterodyne construction but who have wished to do so, will find this simplified super a dish to their taste.
Interest in set building and in kits is maintained at a mark that scarcely would have been predicted a year ago. It appears that the anticipated falling off in "how-to-make" radio has not developed. On the other hand there are general signs of increased interest.
One sure register of technical radio interest is to be found in our correspondence from fans. They are more enlightened as to what they want than they were two or three years ago but they are just as enthusiastic. It had been a rather commonly heard prediction that interest in technical radio would slump off sharply after the first glow of enthusiasm, just as interest in automotive engineering and interest in talking machine mechanics died away. But it is now apparent that there will remain indefinitely a large number of fans who will not be satisfied unless they can make their own.
Editor of RADIO AGE.