Hello everyone!
I would like to kindly ask for help / useful advices regarding the following problem:
The clean channel of my Spider Valve mk2 112 type amplifier is making distortions regardless its volume. I have already changed the tubes, so there are completely new tubes inside, and resoldered and cleaned the sockets as well. The the gain meter is in a low position too. The bias has already been settled as well. It is of course not an operating issue. If the guitar is directly connected (power amp in) to the back of the amp, this phenomenon never happens.
Thank you very much for your help in advance.
Have a nice day,
Leslie
