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.
We found this circuit in a 1995 documentation. It is a two-channel preamplifier for supplying a...
The presented circuit was found in the National Semiconductor's Linear Applications Handbook from...
This circuit is from a Popular Electronics from the 90's. The audio amplifier admits equivalent. The...