Radio Broadcast (May-Oct 1925)

Record Details:

Title:
Radio Broadcast
Date:
May-Oct 1925
Publisher:
Garden City, N.Y., Doubleday, Page & company [etc.]
Volume:
Radio broadcast ..
Leaf #:
00078
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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7° Radio Broadcast The circu records. remains in the plate circuit of the last tube. When recording and then reproducing in this fashion, it is most important that the amplifier, which is really used twice, be free from audible distortion. With the interposition of the several mediums, it is inevitable that quality will be lost, and every effort must be made to reproduce faithfully. Unless the experimenter is very sure of the results produced by his amplifier, resistance coupling is recommended. In the photographs, a three-stage resistance-coupled amplifier was employed for recording, and a two-stage transformer-coupled amplifier for reproducing. The reproducing system can be readily applied to any phonograph arrangement where great volume or electrical transmission is desired. It is only necessary to place the microphone where it will intercept the sound waves at a point of fair concentration. A magnetic microphone of the type described is preferable to the ordinary carbon grain variety. 90-120 V. FIG. 3 it diagram for the amplified reproduction of audio This system may be employed for the amplification and transmission of phonograph music SHOOTING TROUBLE EVERY laboratory, and every radio experimenter for that matter, must be prepared for the innumerable difficulties that beset the way of radio experiment. This laboratory has its full share of them; in fact it is part of its business. Shooting trouble may be simplified and thereby made more swift and efficient, by following a certain logical procedure. A doctor does not treat his patients in a haphazard manner. He does not tap them on the chest when they have a tooth FIG. 2 The amplifying arrangement for reproducing the records on the loud speaker. The telephone receivers or loud speakers employed for recording may be used as pick-up microphones in reproducing