Guys just thought you might want to hear this as I can personally testify to the fact that if your gonna fool around with amps and especially tube amps don't just think you know what your doing. I've worked with and around electronics most of my life but tube electronics are the most deadly things you can ever stick your screw driver into, some if not most tube circuits will carry an average of around 600 volts and at amperage that'll put you straight in the ground. I've never gotten bitten working around my amps but I did get a nasty bite one evening working on my ham radio gear and my wife will testify I came up with an entirley new language at that moment.

So please if you think you know what your doing just stop yourself, put that screw driver down and call your nearest repair shop and set up an appointment to bring the ol girl in. Else wise nice knowin' ya, there "sparky".