Mark iv A - 1990
So I have an annoying hum. It gets way worse when you turn up the reverb.
I have tried
- new RCA cables for the reverb tank
- unplugging the reverb tank
- brand new 12at7 in the reverb tube spot
Nothing helping so far
Suggestions?
Replace all the preamps?
Take it to a tech?
So I have an annoying hum. It gets way worse when you turn up the reverb.
I have tried
- new RCA cables for the reverb tank
- unplugging the reverb tank
- brand new 12at7 in the reverb tube spot
Nothing helping so far
Suggestions?
Replace all the preamps?
Take it to a tech?