Vacuum Tube distortion module.
This is the PCB and Panel for the Safety Value design that Sam posted at Look Mum No Computer. In this case a chopped off version with 10HP. Check that out for more info:
www.lookmumnocomputer.com/the-safety-valve/
www.lookmumnocomputer.com/the-safety-valve/
Module is available as a DIY project only.
This Module is currently available.