This fuzz effect for guitars was found in an American 1980s documentation. The transistors may be the BC549 and should be battery powered for noise sensitivity. Diodes are commonly used.
This circuit uses an unusual Motorola integrated. The circuit is from Motorola's 1990 Linear...
This circuit was found in a September 1987 Radio Electronics. The current through the switch is...
The circuit shown in the figure triples the alternating voltage providing a continuous output...