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Audion Radio Valve, by De Forest, USA, c. 1907

Inventory Number: 90974

Date: c. 1907

Maker Details: Attributed to Lee De Forest.

Inscription: None

Size: 75 mm in overall length

Materials: Glass, assorted metals.

Other Given Number(s): Christie's 196, Science Museum Laon 1924-409.


Single-Wing Audion Triode Radio Valve, with defective base connection. Attributed to Dr Lee De Forest and his first triode experiments of 1907 in Denman, Vol II (p 74).

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