Principles of radio. Part 1. Sending radio messages

United States, 1943

Film
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Sorry, we don't have images or video for this item.

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.

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Collection

In ACMI's collection

Credits

production company

ERPI Classroom Films

Duration

00:10:17:00

Production places
United States
Production dates
1943

Collection metadata

ACMI Identifier

009627

Language

English

Subject categories

Advertising, Film, Journalism, Mass Media & TV → Radio - Receivers and reception

Advertising, Film, Journalism, Mass Media & TV → Radio waves

Communications, Infrastructure, & Transport → Communications - History

Communications, Infrastructure, & Transport → Radio waves

Documentary

Documentary → Documentary films - United States

Educational & Instructional

Educational & Instructional → Educational films

Educational & Instructional → Instructional

Mathematics, Science & Technology → Amperes

Mathematics, Science & Technology → Radio waves

Mathematics, Science & Technology → Sound-waves

Short films

Short films → Short films - United States

Sound/audio

Sound

Colour

Black and White

Holdings

16mm film; Access Print (Section 1)

Please note: this archive is an ongoing body of work. Sometimes the credit information (director, year etc) isn’t available so these fields may be left blank; we are progressively filling these in with further research.

Cite this work on Wikipedia

If you would like to cite this item, please use the following template: {{cite web |url=https://acmi.net.au/works/72651--principles-of-radio-part-1-sending-radio-messages/ |title=Principles of radio. Part 1. Sending radio messages |author=Australian Centre for the Moving Image |access-date=21 June 2025 |publisher=Australian Centre for the Moving Image}}