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View Full Version : Red Tube Glow....Burning Smell


Mantis
03-16-2008, 01:28 PM
My neighbor has a Fender Deville Hotrod 4 X 10. Yesterday while playing it for about 20 minutes I suddenly noticed that the amp wasn't sounding right. It started farting in and out and lost it's dynamics. So, I stopped of a second and looked behind the amp.

One of the power tubes was glowing BRIGHT RED, while the other was a normal orange glow. I also noticed a hint of a burning smell, but no smoke. I quickly powered it off.

What could be the issue? Is this amp easily serviceable. It still has the original GT tubes in it from about 4 years ago. I want to help my neighbor fix this amp because I sold it to him a while ago. Any help, thank you, Brian.

5E3
03-16-2008, 01:36 PM
Blown tube. Try replacing it.

Blue Strat
03-16-2008, 01:38 PM
Yep, blown tube which could be the result of lost bias due to something wrong internal to the amp.

If you replace it, be sure to check the bias or the same thing might keep happening.