Explains by animated drawings, the operation of a radio vacuum tube in terms of its filament, plate, and grid circuits. Illustrates the three functions of the vacuum tube in radio: how it serves as an amplifier to operate the loud-speaker, as a rectifier in detection, and as an oscillator to generate the carrier wave.
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Collection
In ACMI's collection
Credits
Collection metadata
ACMI Identifier
011422
Language
English
Subject categories
Advertising, Film, Journalism, Mass Media & TV → Radio
Advertising, Film, Journalism, Mass Media & TV → Radio frequency
Advertising, Film, Journalism, Mass Media & TV → Radio waves
Communications, Infrastructure, & Transport → Radio waves
Documentary → Documentary films - United States
Educational & Instructional → Educational films
Educational & Instructional → Instructional
Mathematics, Science & Technology → Oscillators, Audio-frequency
Mathematics, Science & Technology → Physics
Mathematics, Science & Technology → Radio waves
Mathematics, Science & Technology → Science
Sound/audio
Sound
Colour
Black and White
Holdings
16mm film; Access Print (Section 1)