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 a publication by National Semiconductor, this circuit provides an output voltage of 3.3...
Found in an Electronics World of 1966 this circuit can be made with current power transistors. It causes...
This configuration can be found elsewhere in this section. This was obtained from old RCA...