Made for Marshall by Sola Sound this is essentially a slightly modified Tone Bender MkII. Fuzz Central state:
The only differences between the two: the input capacitor is 10µF instead of 5µF, the bypass capacitor on the “attack” pot is 10µF instead of 5µF, Q2’s collector resistor is 47K instead of 100K, the resistor from the base of Q1 to ground is 10K instead of 100K, and the transistors are OC75 instead of OC81D. The sound of the pedals should be nearly the same, although the Supa Fuzz will probably be bassier since the input capacitor is quite a bit larger, especially with that 0.01µF from input to ground still in place, which removes even more treble.
Suggested mods
Fuzz Central suggest the following mods and the trimmer would seem like a good idea to me to accurately bias Q3:
470R changed to a 1K for more volume
8.2K changed to a 25K pot for external bias
