pvandendungen
Member
Hi,
The outer right power tube of my Mark III starts red plating as soon as I take the amp off standby. It also affects the tube next to it, which will also start red plating a bit.
Thought it was a faulty power tube. Ended up replacing both the power tubes and preamp tubes (they were due to replacing anyway). I switch it on, wait a couple of minutes, take it off standby, and boom... the same tube starts red plating again.
El34s are Mesa TS red. 6L6s are Mesa TS grey. Conclusion is that it's probably not the tube's fault. Could it be the caps leaking voltage or something like that? Would replacing the caps fix this?
I'm happy to hear if someone experienced this, and/or if you know a solution.
Thanks a lot and sorry for my English
Philippe
The outer right power tube of my Mark III starts red plating as soon as I take the amp off standby. It also affects the tube next to it, which will also start red plating a bit.
Thought it was a faulty power tube. Ended up replacing both the power tubes and preamp tubes (they were due to replacing anyway). I switch it on, wait a couple of minutes, take it off standby, and boom... the same tube starts red plating again.
El34s are Mesa TS red. 6L6s are Mesa TS grey. Conclusion is that it's probably not the tube's fault. Could it be the caps leaking voltage or something like that? Would replacing the caps fix this?
I'm happy to hear if someone experienced this, and/or if you know a solution.
Thanks a lot and sorry for my English
Philippe