Phase detector (CB8155E)

This circuit was found in a 1967 Electronic Design. The FET is from that time. Capacitor C is determined by the frequency of the signal worked.

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() CB8710E Turns on and off with SCR
We found these circuits in a 90s Radio Electronics. In them, we have the way to turn a load on and...
AC Amplifier (CB23599E)
This circuit is an application for an operational amplifier with field effect transistors from...
FM stages with tunnel diode (CB22545E)
This FM receiver input circuit with tunnel diodes was found in documentation from 1952. The...