Thor active EQ

[FunkyGibbon]

Hello,

I am planning a Dr Boogey build, and have been looking at the latest from ROG to improve the circuit. I've taken some tips from the updated Fetzer Valve article, and have also looked at the Thor project.

I thought I might add the EQ section from the Thor as an option (with and without the Dr Boogey tone stack). However, I'm not sure EXACTLY where the Thor EQ section starts and ends - i.e. what I would need to include to lift it from the Thor and place it in the Boogey!

My guess is the 'stack-looking bit' from the op-amp down, but I just don't know.

Any suggestions?

Thank you,

Christopher