Tube Amp Archive

Thanks a lot for all the responses. I went out and bought myself some tubes. I checked for the bad one and replaced it. Done! Good as new. Thanks for helping me out!

I have a B-52 At-100 head. Its a high gain 100 watt head with 4 5881 power tubes and 7 12ax7b tubes. I bought it used over a year ago and its been working fine until two weeks ago. The sound is incredibly soft, the tones awful, and there is loud popping. Also, my power tubes are glowing blue which I...