Build Your Own Effect Pedals - Rat (Part 1) Schematic - YouTube
DIY Rat Clone Distortion Guitar Effect Pedal - the Dead RAT : 5 Steps (with Pictures) - Instructables
Wired RATATAK Assembly Instructions – Synthrotek
Here's the classic RAT distortion with on-board pots. All the ProCo RATs are essentially the same circuit, just with a few value… | Diy guitar pedal, Rats, Projects
DIY Pedal Building - Proco RAT Distortion Pedal Build Demo - YouTube