It's a standard silicon Fuzz Pedal circuit, made up using two common NPN transistors, the BC547, and the 2N5088. I've tried to "take it to the limit", to produce an extreme distortion clipping sound. There are three control points on this pedal:
- the volume
- the crunch switch, that sets the gain to a low value
- the stoner switch, that makes the pedal sounds thinner or fatter
It's called "Radio France" Fuzz, cause while playing with different components values on my breadboard, i can even even hear a radio transmission from France (likely AM), which is pretty distant from where i live. Luckily this doesn't happens on the perforated board, but it was enough for me to call it Radio France Fuzz.