Tube Amp Archive

Have you tried going to a fabric store and looking for a heavy black cotton twill, maybe 12 oz. or heavier? Tweed is actually a type of twill, but the term is usually used to refer to wool fabrics, and I'm pretty sure Fender tweed is actually heavy cotton twill (or at least it was in the 50's, maybe...

I opened it up anyway today. The cap can is a JJ replacement, and you can see the somewhat poorly enlarged hole in the chassis, but other than that I think it's all original. The tremolo issue aside (since I don't have a multimeter now anyway, one is on the way) any thoughts? I'm wondering if I shou...

I guess the good news is, the old stock RCA USA 7025 that was previously in V1 probably isn't dead. Good thing I didn't throw it away.

And the phase shift caps, the 0.02, 0.01, 0.01uF, side-by-side. See if you have any DC voltage on the CW lug of the speed pot (junction of the 0.02 and 0.01). If so, replace at least the 0.02 because it's leaking. The new tube might have been just enough of a boost to get it working again, for a wh...

Does the trem circuit default to on? Looks like it should http://bmamps.com/Schematics/fender/princeton_6g2_schem.pdf Is this a real Fender 6G2? If so, is the amp properly grounded? It looks like all the resistors / pots in the trem section can be measured in circuit, so that would be a good place ...

Yes, I forgot to mention that I tried it without the foot switch, it was still dead, though I wasn't sure what the behavior is supposed to be without the foot switch since I've never played the amp before without. Does the trem circuit default to on? I'm aware of the hazards. I am completely inexper...

The tremolo just quit working more than a year ago, the switch has no effect whatsoever. I hadn't been playing this amp much anyway, and pretty much resigned to take it to a knowledgable tech but never got around to it. A couple of weeks ago I decided to try a new tube in V1 to see if that did anyth...