I love my ProCo RAT reissue, but it’s been falling off my pedal board. The Velcro doesn’t seem to sit correctly. So I figured I could build a clone and throw some mods into it while I was at it. I ordered all the components and the enclosure from mammothelectronics.com. I got the PCB from GeneralGuitarGadgets.com.

I put it all together. I clicked it on and NOTHING. I have no idea what’s wrong with it. I only have one LM308 ic chip. So I just ordered a few more. Hopefully it’s just a bad chip.

The lower left and right knobs will be the BIAS controls. The toggles are different clipping diode switches.