Radio Broadcast (May 1929-Apr 1930)

Record Details:

Title:
Radio Broadcast
Date:
May 1929-Apr 1930
Publisher:
Garden City, N.Y., Doubleday, Page & company [etc.]
Volume:
Radio broadcast ..
Leaf #:
000129
Language:
English
Subjects:
radio periodical, Radio -- Periodicals
Contributor:
Library of Congress, MBRS, Recorded Sound Section
Sponsor:
Library of Congress, Motion Picture, Broadcasting and Recorded Sound Division
Coordinator:
Media History Digital Library
Description:
Radio Broadcast supported home listeners of the new technology of radio – for building or buying a receiving set to explaining the technology used by the new radio stations. Throughout the magazine shows the cultural influence of radio as it evolved from hobbyist to mainstream. -- David Pierce, 2011
Date Added:
September 29, 2022
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~Z . RADIO BROADCAST ADVERTISER. new tubes from the De Forest laboratories To meet the requirements of the modern Screen-Grid Radio Sets — the De Forest laboratories have developed the improved "high vacuum" ecreen-grid Detector-Amplifier, Audion 424. It has the usual amplification factor of 420, eliminates all hum and crackle and will give new performance standards with screen-grid sets. Another development of the De Forest Laboratories is a perfected humless Audion 427, the improved A. C. Heater type detector which gives to sets operated by socket power, the same purity of tone that characterizes battery sets and reduces the AUDION 424 The 2Y2 Volt A. C. Humless Screen-Grid Detector-Amplifier. AUDION 427 The Humless A. C. Heater Type Detector-Amplifier. AUDION 445 The Volt A. C. Poiver Tube. heating time to 10 to 15 seconds. The third achievement of De Forest Engineers is Audion 445 — an A. C. Power tube that produces an amazing purity of tone with freedom from distortion under heavy loads. Visit us in June at the Chicago Radio Show (Booth No. 12 and also Suite 410 at the Blackstone Hotel) and learn more about the perfected De Forest "high vacuum" Audions, the only radio tubes with 23 years history behind them. De Forest Radio Company Jersey City, N. J. AUDIONS "HIGH VACUUM" RADIO TUBES • June, 1929 . . . page 113 •