This circuit makes use of a mechanical delay line to produce the reverberation effect. This is a '80s setup, showing both channels for a stereo system.
Details of the coil of this two-transistor generative receiver were not given. We found it in a...
This very high input impedance circuit is suggested by Texas Instruments. The circuit can be...
This circuit from an 80's publication also features low input capacitance. FET can be a modern...