This circuit is an improvement over the previous one, using the same capacitor system as a sensor. We also found it in Radio Electronics from the 80s.
This circuit can be used to produce the sound of bongo drums. Damping is adjusted by P1. The...
This interesting idea of a radio detector for a medium-wave radio is from a 1966 documentation. The critical...
This circuit was found in a 1965 General Electric publication. The circuit can be adapted to...