Peavey Deuce eating fuses

[überfuzz]

A friend of mine has a Peavey Deuce that's burning fuses. The amps sound fairly good and he doesn't feel like retire it just quite yet. I had a fast tinker session a while back. I modded the speakers out section. It had some fancy wiring that, I believe, changed the output after the speakers. It had caused a minor fire so it was a prime suspect. Now the amp has go two outputs; one 4 Ohm and a 8 Ohm.

Anyhow, the amp is still burning fuses, in the same fashion, as before I vent in there.

Anyone here that came across a Deuce that burned fuses? Any pointers on how to resolve this issue..?

[überfuzz]

I just realised that the speakers might still cause problems. If he hooked up the 8 Ohm out a 4 Ohm speaker, it could be problematic... I'll ask about it.

[Twist]

Does the fuse blow after you take the amp off standby? If so, your looking at a shorted output tube. A 4 ohm speaker plugged into a 8 ohm tap wouldn't blow a fuse. You do need to keep a speaker plugged while testing the amp though.

[überfuzz]

The fuse blows in the solo of Shot by both sides. (Actually I does, I've seen it for my self.) He uses a pedal to get slightly more break up and a higher volume.

[Krwkka]

The fuse blows in the solo of Shot by both sides.

Well, there you go. Not a good song for those amps.

[jmaf]

I just realised that the speakers might still cause problems. If he hooked up the 8 Ohm out a 4 Ohm speaker, it could be problematic... I'll ask about it.

I wouldn't worry as much about the speakers, unless they're totally shorted. Are the fuse ratings right, perhaps you need a slo-blo? If you have a current limiter(lightbulb in series) you could run more 'risky' tests.

[überfuzz]

Mhmm... Apparently this amp has been sitting in a garage for many long years. I guess to many caps has gone south. Further, I think I mentioned the fire in the out put section. I prescribe some deep surgery, but I'm not sure the owner feels like spending $$$ on this amp.

[Krwkka]

I still think it's the song, but as jmaf suggests, are you using the correct fuse? The schematic calls for a 5 amp fuse (on 120VAC amps).

[R.G.]

Mhmm... Apparently this amp has been sitting in a garage for many long years. I guess to many caps has gone south. Further, I think I mentioned the fire in the out put section. I prescribe some deep surgery, but I'm not sure the owner feels like spending $$$ on this amp.

I wonder how much he thinks even a small house fire will cost.