loud scratching noise on One Channel

[maxkracht]

Thought of another easy to overlook/hard to chopstick problem. If the pots are loose at all you can lose ground connections intermittently. Also, I think there are a couple grid wires running under the board right next to those tone stack caps. Hidden melty insulation could cause some problems and make that part of the board poppy.

[hebaton]

Hi all and thank you for the help.
I believe I have found the issue. tink it is the tube socket itself. Most of the pin connectors will move up and down easily from when pulled from inside.
If I push the tube inwards and hold it there while sound goes trough the channel, the issue does not come up !

Would much appreciate recommendations for the best tube socket replacement !

[maxkracht]

Beltons are nice, if you don't mind the color difference. You might get away with cleaning the original socket if it doesn't look too damaged. I fill a syringe with rubbing alcohol and squirt it through each pin. Then use a toothpick or a tiny brush to scrub the inside of the pins. Collect the alcohol with a paper towel and when you get a clear stain instead of a brown one you are probably done. This might take multiple attempts and can help if you scrape away any flux before starting.