#1
So, I just recently spent a good deal of money to get a bunch of things on my 1977 Fender Silverface Champ repaired. Caps, wire harness, speaker, etc. But I still have one problem with it; I blow power tubes like nobodies business. I've gone through 5 since I got in early in the summer. I either blow them or they go microphonic on me. It usually takes about 2-3 weeks for this to happen. Is this just one of the curses of vintage low wattage amps or is something wrong?
Winner of the 2011 Virginia Guitar Festival

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#2
I don't know what would do that, but that definitely sounds like somethings wrong.
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#3
The first thing that comes to my mind is that the bias is probably too hot. Have you biased the amp?
If yes, then
#4
Quote by Sguit
The first thing that comes to my mind is that the bias is probably too hot. Have you biased the amp?
If yes, then



I have not biased it. I'll look into that I guess?

Do you have to worry about biasing with one power tube though?
Winner of the 2011 Virginia Guitar Festival

Protools HD
Lynx Aurora 16/HD192
Mojave, Sennheiser, AKG, EV etc mics
Focusrite ISA828 pres
Waves Mercury
Random Rack Gear

65 Deluxe Reverb
PRS CE 22
American Standard Strat
Taylor 712
Last edited by Artemis Entreri at Jan 1, 2010,
#5
Quote by Artemis Entreri
I have not biased it. I'll look into that I guess?

Do you have to worry about biasing with one power tube though?


It's a cathode biased amp so you shouldn't have to worry about it. I'd pm Roc8995 or SomeoneYouKnew as they seem to be the most knowledgeable on the forum. They might not be able to diagnose it over the internet though, in which case you'd have to take it to a tech.
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