Dead tube problem.. need help!

[suislidE03]

I just turned my amp on to play some clean stuff an hour ago and noticed i was getting breakup at even low volumes. I just ignored it for a while until i started messing with the knobs and figured out that didnt help.. so i turned the amp around and one tube wasnt glowing anymore and the other wasnt glowing very much.. i just put these tubes in yesterday (JJ 6l6gc) and they were working fine! How could this happen? I popped in my old El34s and hit the bias switch and they were working perfectly. The tubes were brand new.. i dont understand whats wrong.. was it the tubes or the amp?

 

[aleclee]

Re: Dead tube problem.. need help!

If the amp works fine with other tubes, it's probably the tubes that were bad. New tubes can fail quickly. That's why a lot of dealers will burn 'em in. As for why they failed, the reasons can be numerous.

 

[suislidE03]

Re: Dead tube problem.. need help!

Wait i just remembered.. last evening there were 3 power sags in the neighborhood (maybe surges too) where the power died and came right back on within a second.. the amp wasnt on but it was plugged into the wall. Could that do anything to tubes you think?