A Modern Aladdin's Lamp

Reboque

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.

Gênero: Documentário

Fundida: Lowell Thomas

Equipe técnica:

País: United States of America

Tempo de execução: 22 minutos

Qualidade: HD

Lançamento: 1940

imdb rating 7

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