I was looking at my Crate V18-112 and they are using pins 1, 6 and 8 as jumpers.
Just wondering how feasible it would be to cut the traces around the tube pin on these pcboards- is there a tool like a hole saw to cut out a neat circle around the copper pad? Or maybe even cut the terminals going from the tube socket to the board...
If anyone has dealt with this before I'm searching for ideas here.
P.S. Be sure to inspect your 6BQ5's both visually and with a meter to make sure that pins 1, 6 & 8 aren't connected to anything. I would not rely on the spec sheets for this.