scottosan
Well-known member
I have been troubleshooting why my guitar pot is scratchy for the first few seconds after I take it off standby. What I have found is that I measure -0.8v DC on the V1a input while only the heaters are powered. I could understand if I had the B+ applied, but we are talking AC heaters hear. A few seconds after B+ is applied it goes to zero, but annoying none the less. I know I can resolve this with a cap on the input, but I prefer to diagnose the problem .
I have swapped all tubes. I have removed all tube except V1 and it's still there. I have swapped input jacks and validated my 1M load resistor is fine and I have redone grounding
I have swapped all tubes. I have removed all tube except V1 and it's still there. I have swapped input jacks and validated my 1M load resistor is fine and I have redone grounding