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.
How to watch
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)