Speaker noise after tube amp shut down


Last night when I shut down my tube amp I have noise in one speaker.
This hapen about 20-30 seconds after I power down my amp and last about 10-20 seconds. Today I experiance same.
What you think happend? Bad tube?
Everithing is find when amp is up and playing!
Thank you!
ilidra

Showing 1 response by gundam91

Got a spare set of tubes? How old are the tubes? When was the last time you replaced them? After swapping the cables, I would try changing all the tubes just to see whether the issue is caused by the tubes or not.

FrankC