Radio Broadcast (Nov 1923-Apr 1924)

Record Details:

Title:
Radio Broadcast
Date:
Nov 1923-Apr 1924
Publisher:
Garden City, N.Y., Doubleday, Page & company [etc.]
Volume:
Radio broadcast ..
Leaf #:
000284
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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CUNNINGHAM RADIO TUBES C-301A— 5 Volts 1-4 ampere filament $6.50 C-299— 3 volts. 06 amp. Dry Battery Det. & Amp $6.50 C-300— SVolts Gas Content Detector $5.00 C-ll— 1.1 Volts. 25 amp. Dry Battery Det. and Amp.SpecialBase §6.50 C-12— Similar to C-ll with standard base §6.50 Type C-301A gives Amplification with onl; nient Current. greater Power % Amp. Fila PATENT NOTICE Cunningham tubes are covered by patents dated 11-7-05, 1-1507, 2-18-08, and others issued and pending. Licensed for amateur, experimental and enteiia inment use in i ad io communication. Aug other use will be an infringement. For Every Make of Receiving Set THROUGHOUT the entire country to-day Cunningham Radio Tubes are recognized as the ideal tube for use in all makes of Radio Receiving Sets. The famous Cunningham C-301A Amplifier shown above is a high vacuum tube designed for use as an amplifier and detector containing a new Tungsten Filament, the characteristics of which are long life, low power consumption, low operating temperature and greater power amplification than any previous amplifier tube. This tube has a standard four prong base, and the glass bulb has the same dimensions as C-300 and C-301. The filament current is only one-fourth of the filament current of the previous type of Amplifier tube, and it is, therefore, possible to use four of these tubes in a set, without exhausting the storage battery any faster than when using only one of the previous types of tubes. The care and operation of each model of Receiving Tube is fully explained in our new 40 page "Radio Tube Data Book." Copies may be obtained by sending ten cents in stamps to our San Francisco office. Home Office: 182 Second Street San Francisco 154 West Lak 2 Street Chicago 3 0 Church Street New York Tested and approved by Radio Broadcast