Tone Bender Mk.1/Mk.2 board

This is a custom-designed circuit board to allow you to build either a Mk. 1 or Mk. 2 Tone Bender (not at the same time - you have to choose one!)

It's a little wider but should fit in a sideways 1590BB.

I made a bunch of these but never got round to using them for anything. It will come with instructions on how to configure it.

All values printed on the board, with individual bias trimmers for all transistors.