Hey guys, I know this is an older thread, but I've just built a Rev 2 and I'm getting a major ground buzz. I'm using all Edcor for input/interstage/output but the entire board is populated in case I want to switch at some point. I saw in the Rev 4 that there was some jumpers that had to be made to the board regardless of what types of transformers, just wanted to see if anyone might have a build doc describing any details on this or can help me out with tracking this down.
I have the wiring diagram, I have to admit I'm a little confused on the orientation of the pots, meaning which legs in the diagram are 1,2,3 so I can make sure I've got that right on my end. I want to believe this is something very simple. You can tap on the tubes and hear it over the hum plain as day. I'd love to get this up and running, so, if anyone has any documentation, or can point me to where it could be hiding in this thread I would be insanely appreciative.