Lee De Forest 1873 - 1961

occupation:
Electronics engineer, Inventor
Nationality:
American

1906 invented the triode (audion); developed sound for motion pictures

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De Forest Audion soft detector triode (McVitie Weston valve collection), 1906-1972

De Forest audion 1906-1915

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McVitie Weston valve collection, De Forest valve, type DV5

Print, portrait: Lee de Forest

De Forest Variable Density Sound

Audion (with spherical bulb), 1906

Audion thermionic triode valve

De Forest Variable Density Sound

De Forest Variable Density Sound

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