Found in a 1969 documentation, this circuit for the 20 MHz band does not use a transformer. The circuit is a phase detector that makes use of the transistor of the time.
This circuit was found in a 80’s Popular Electronics. The components are common and the 8-ohm...
This configuration appears at several points in this section, obtained from different sources....
This circuit was found in the July 1992 Radio Electronics magazine. The output circuit must be...