Principles of radio. Part 1. Sending radio messages

United States, 1943

Film
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Detailed treatment is given to the following: operation of the microphone, transformer and modulator; nature of a sound wave; direct current; alternating current; voice current; carrier wave; and amplification.

Credits

production company

ERPI Classroom Films

Language

English

Duration

00:10:17:00

Colour

Black and White

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