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Old 11th Aug 2018, 9:30 pm   #13
'LIVEWIRE?''s Avatar
Join Date: Mar 2006
Location: N.W. Oxfordshire(Chipping Norton)
Posts: 6,580
Default Re: Marshall JTM45 Guitar Amplifier- Mains (Primary)Fuse Blows

After I've had a chance to check the amp. further, sometime on Monday, I should know what is at fault. In the meantime, Ed, what would you charge to rewind the mains transformer? New ones are around the 100 mark on different sites I've checked.

B.t.w., Lawrence, I only mentioned Bias, because I'd been given a message from the owner about the Bias, but didn't know exactly what he meant. After almost 50 years repairing electronic gear I know that grids should be negative w.r.t. cathodes. Perhaps the owner, to whom I haven't spoken personally, suspects there may be a fault in that part of the circuit.
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