Summary

Diode designed for signal detection at high frequencies, originally intended for video detection in television receivers but adopted for use as a detector in radar receivers during World War II (1939-1945).

4 volt indirectly heated cathode.

Manufacture: Edison-Swan Electric Co. Ltd., England.

Physical Description

Miniature tube; small cylindrical glass bulb with flat pinch at one end with 3 pins and pin at the other end.

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