Thanks for your reply, I thought more people might have had similar issue but I guess not.
I exchanged each pre-amp tube for the new one 1 by 1 testing each time and they were all good, same sound
I checked each of the pin holes they all look to be fine. I know this amp in it's like has almost no hours on it from knowing it's history.
I'll have to check inside the amp next and get some contact spray.
It's just the treble channel that makes the issue i think. When I turn it all the way down as it's coming down 5, 4, 3, 2, 1 it's getting louder then
when I turn it up it just sounds dumpy garbled. It's just not the sound I know from these 2 channels and never have heard an amps treble gain in
volume when it's turned down so I'm thinking it's there where the problem lies.
If anyone knows of what that is or means Id appreciate it. Is it a pot that could be it?
Thanks Guys
and Thanks afu I'll write back after I check the inside.