This is a combo bend, mod and mash of a Yamaha RX-21 with a Sony SEQ 120 and a mutilated distortion circuit.
The RX21 is fed into the left channel of the EQ, through the distortion circuit and then into the right channel of the EQ. This gives a pre and post distortion EQ, When in distortion bypass, both EQ channels work together.
The distortion circuit has been bent, and I've added a voltage drain control.
Three toggles on the RX-21 create havoc.
This unit is quite unpredictable. Levels can jump, so be careful until you get the hang of it. It can be noisy but a deft hand can use that to advantage.
Turning on the EQ turns on the complete unit. No additional power supply is needed.
Please excuse the dust.