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.
Found in the May 1971 Radio Electronics magazine, this is the circuit for a commercial...
This circuit was found in an old factory documentation. The circuit uses single-junction...
We found this 555 integrated-circuit tester in an old Electronics Hobbyst from 1977. The circuit is...