Hi there,
I've read alot on this thread and started to built my own sustainer. I was able to built a 8ohm driver, which I didn't expect to be that easy to build. :-)
As preamp I've built the little gem amp, but it has no transistor preamp. I've connected everything as it says in your pictures, but it just gives me nasty high pitch noises.
Doesn't it work because of the Little Gem? Do I have to build the F/R?