This circuit works with the previous two by demodulating the signals received modulated in FM. The circuit is from the Radio Electronics magazine of December 1992.
This circuit was found in a 1970's Radio Electronics. The pulse transformer has a 1: 1 turn ratio....
We found this circuit in a documentation from the 70s. The circuit uses amplifiers from the time,...
This circuit is an alternative to the previous circuit. We found it in the same article in the...