Quote:
Originally Posted by PaoloJM
I'm not familiar with the Marshall standard points you mention.
Can you give the voltages in the normal format, as in per pin of each valve?
My calcs concur with Jon on your PT so I don't believe we need to worry about that either.
Were the rectifier diodes always wired like that? 
They seem to be practically hanging there, and are routed very close to the signal wire on the right hand side power valve, which also doesn't have any grid stops. I've never seen a diode rectifier take a ground directly from a mounting screw like that.
It seems bizarre that a noise making circuit, like the rectifier, would be mounted directly over a signal wire. 
That would definitley be my first thing to check out!! |
Good call on the rectifier. Another and much neater way I've seen it done on these heads is to use a self contained bridge rectifier, but only the positive side gets hooked up, effectively making it into a positive full wave center tap rectifier.