Tube amp problem

[throbbinnut]

You lost bias or had some tubes go gassy from overheating. What you saw was the plates overheating from too much current flowing. Have it checked out by a good tech. You probably did not hurt the transformers, but you will probably need new tubes.

Chris

 

[Pete Atkinson]

Hey guys, I have a tube amp problem. I was playing through my Mesa 400+ last night when I noticed my bass was cutting in and out. I looked to the back of the amp and noticed that the power tubes were glowing bright orange in the MIDDLE of the tube ( I know that this is abnormal ). Before I could shut off the power the fuse blew and that was it.
I took of the top and bottom covers and did not smell or see anything burnt, I did notice that the one of the transformers was hot and the other was just luke warm. Does this sound like a blown transformer or something else? Please help.

THANKS!!!

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[Doug]

Usually if the plates are glowing it's because your'e bias has drifted drastically. You may have a tube going also. Get it checked out, by a good tech., before using it again.