Auto Bias for FET (CB6125E)

This configuration is from a 1964 US documentation valid for any FET. The range of power voltages depends on the application.

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556 Multi-Hour Timer (CB19101E)
The 556 consists of a double integrated circuit 555, which can be replaced by them in this...
Capacitive relay (CB23765E)
We found this circuit in a Radio Electronics from January 1967. The SCR is already the C106, which...
Programmable Gain Amplifier (CB13915E)
This circuit is from American documentation from 1970. It can be designed with a BC558 and for the...