A Modern Aladdin's Lamp
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Synopsis
With Western Electric Vacuum Tubes in the starring roles, this film tells the fascinating story of tube development from the first crude bulbs of Edison and De Forest to the powerful and efficient tubes in use today, and shows the prominent part they play in radio, long-distance telephony, public address systems, sound motion pictures and the phonograph.
Fiche technique
- 20 octobre 1940
- Released
- United States of America
- Audio Productions Inc.
- 22 min
Où regarder
Aucune offre de streaming connue (pays : France).
