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Hi.
I´m a little puzzled. I do have a diy biasprobe that works without errors. But when I´m testing tubes on my 50 top, I get readings like 73 ma (reading is mv) Is this due to construction off the 50 top (measuring both tubes at one time) or is it running ekstremely hot? It has a fixed bias, with a 4k7 resistor, which I´m planning to change for a 10k trimpot.
Any help will be apreciated
Thanks
Per
I´m a little puzzled. I do have a diy biasprobe that works without errors. But when I´m testing tubes on my 50 top, I get readings like 73 ma (reading is mv) Is this due to construction off the 50 top (measuring both tubes at one time) or is it running ekstremely hot? It has a fixed bias, with a 4k7 resistor, which I´m planning to change for a 10k trimpot.
Any help will be apreciated
Thanks
Per