It all started with me wanting a preamp for my guitar,  before I'm done building the Dirty Dozen amp... So, the Sochor seemed okay, and I turned it on. The effect volume pot was badly cracking, there was no dry signal on the output despite having it mixed in, and some other issues. I got down to work repairing it, cleaning the pots. Seemingly it broke, fortunately not.

You may wonder why I don't make too many Youtube videos nowadays... This is the exact reason. I decided to fully reverse-engineer it, not just getting the block diagram but tracking every single teeny tiny capacitor and resistor, so that I can make a set of schematics for anyone to use and if you're interested, maybe even make their own? Ha.