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Western Editor
Ulmer G. Turner
Hollywood Editor
J. Garrick Eisenberg
Editor Donald McNicol
Associate Editors
James R. Cameron
Austin C. Lescarboura
Vol. II
JULY, 1930
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CONTENTS
Page
Editorial 4
Sound Recording Tubes By Jos. B. Zetka 7
PublicAddress and Centralized Radio Equipment, Part VI. By E. W. D'Arcy b
Recorded Broadcast Programs Emerge from the Blacksmith Stage By A. J. Kendrick 12
"Wiring for Sound Recording and Reproduction 13
Synchronous Electron Motor May Have Various Uses 14
Sound-Motion Pictures By T. J. Coleman 15
Trouble Shooting in Amplifiers By J as. B. Cameron, Associate Editor 20
Television on the Theatre Screen 23
D epartm ent s
News of the Industry and New Developments 28
Index of Advertisers 30
Publishing Aviation Engineering Radio Engineering Projection Engineering
Entered as second-class matter October 9, 1929, at the post office at Albany, N. Y., under the Act of March 3, 1879.
Published Monthly by
Bryan Davis Publishing Co., Inc.
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New York City
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Bryan S. Davis, President
James A. Walker, Secretary
Sanford R. Cowan Advertising Manager
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