Question about Amplifiers & Preamps
It could be a tube, it could be the usual old age catching up with it. I would start with checking the tubes and see that they all light the same way and colour. Also check for white dust in the end of the tube where it is normally silver. Give them all one by one a bit of a wriggle when the unit is going to see that they are all seated properly. It may be a rectifier tube 5R4 gone, replace it out or do some DC voltage checks about the place. remember there are high voltages present!! It A new set of output tubes never go astray in a classic amp like this. Use Electro Harmonix 6V6EH output tubes, gain matched set of course. They work great at higher voltages that these ol girls use. You could of course, just drop it to a Fender repair guy... and he'll be able to sort it out without mucking around. :)
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Posted on Jun 25, 2008
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