This circuit produces a signal that has the waveform of the sound produced by or near the banjo. The circuit is from an 80's American documentation. The signal must come from an ordinary guitar.
Two inverters of a 4069B type CMOS integrated circuit form this oscillator which is characterized by having...
Raytheon's used operational amplifier is rare today, but the configuration can be adapted to use...
Found in a radio amateur magazine of the 1980s, this circuit uses components that can still be...