Principles of radio. Part 1. Sending radio messages

United States, 1943

Film
Please note

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.

Credits

production company

ERPI Classroom Films

Language

English

Duration

00:10:17:00

Colour

Black and White

ACMI Identifier

28363

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

Holdings

16mm film; Access Print (Section 1)

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Cite this work

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=25 January 2021 |publisher=Australian Centre for the Moving Image}}