Analog Man's take on the old and quite rare Sam Ash Fuzzz Boxxx/Astrotone Fuzz. Bigger input and output caps and a resistor swap at the tone control should make this a different animal compared to the vintage pedals which suffered from lack of bottom end and a useful tone control. Various transistors has been used, often in "black dot" casing. Try NPN silicon with hfe 150-400.
