Hello. Hope everyone is staying safe (and able to pay their bills). I had a recent thread about my homebrew 5F6A- I had a bad recto tube. Weird. In any case, while I had the chassis on the bench I had another issue surface, and I wanted to gather opinions about it. I'm thinking it's a bad pot, but wanted to get the opinions of the heads here. Details on the Amp: It's based on the 5F6A, built on a Hoffman board (layout below), with some of Rob Robinette's mods involved (specifically a switch to lift the tone stak and switchable negative feedback). It's built in a BFDR style chassis It's only got two inputs- one regular and one Hi- both with their own volumes. Vol 1 is an unmodified 1 Meg Audio. Vol 2 is a 1 Meg Audio pot with a bright cap Here's what's happening: When I got it on the bench and put in a new GZ34, it roared to life Channel 2 works great, but there's an issue with channel 1- the one with the vol pot with no cap. At first, I got no response at all- totally quiet with a guitar plugged. With some gentle (and safe) chopsticking, I got it to come on. Specifically , what worked worked was tugging a bit on the wire (marked "this wire" below) from Lug 1 of the volume pot to the .022 cap coming from pin 1 of v1. A gentle tug would make the signal appear again The signal stays "on" for a period of time, but typically shorts out again at some point Here's what I tried: Reflowed the solder on the first lug of the volume pot Verified connectivity between the first lug of the volume pot and the lug on the board holding the end of the .022 cap Verified (with a multimeter set to ohms resistance) that the pot still "worked"- i.e. the resistance changes when turning the knob Verified that the first lug of the volume pot did not have connectivity to ground. I used shielded wire for this part of the amp, so I cut the shields connection to ground, thinking maybe I had an inadvertent connection between the shield and the wire proper. you can see that cut shield wire hanging off the ground buss in some of the pix below I added some Pix. The crust yellow junk is mostly solder flux, but you probably knew that... None of this had any effect. What's your guess? I wonder if I have a bad pot. As you can see, it's pretty tight in there, and all the pots are wired together, so I'm not real excited to try to get another one in there. Anything else I should try? I thought about just putting another wire (or an alligator clip wire) in there?