The temperature range of this circuit is different from the previous one, while maintaining the same configuration. The circuit is from a Radio Electronics from June 1985.
This circuit can operate with signals up to 60 MHz using the indicated operational. We found it in...
This circuit takes advantage of the noise generated at the reverse biased junction of a germanium...
Equivalent transistors can be used on this 80's circuit. Any general purpose PNP transistor can work...