Recent content by hooper

That high pitched noise is probably heterodyning. What are you using to power it? Since the noise only happens with nothing plugged into the input, I'd probably just replace the input jack with a shorting jack (switchcraft 12a, or 112a) with the switch lug tied to ground. On my board, I haven't...

Looks like you've got ECC83's in there. That will certainly provide much more gain than the 12AU7's (ECC82) that would be stock.

Painted!