BD4

The BD-4, Tek part number 152-0070-00, is a 0.1 mA Germanium back diode. It is used in the HF-sync circuit of the 7S14 and trigger circuit of the late 5T1A.

• General Electric BD1 to BD7 Datasheet (PDF)
• Tunnel diode switching circuits and the back diode. Service Scope No. 38, June 1966 and No. 39, August 1966

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