Let's look at the guts from an old Big Muff!
Click following photos to enlarge.
The green caps are unoriginal. I can't remember what they were to begin with.
I don't think the pots are original!!!.
Schematic
This pedal was purchased from a Goodwill store for one dollar. It did not work.
Some of the traces were messed up. Now it works and sounds pretty darn good.
