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 was found in a publication from the 50's. The circuit uses germanium transistors of...
This circuit was found in a 1999 British magazine (ETI). It is a device that receives the signal...
This configuration, which uses germanium transistors and transformers, is from a publication from...