#1
So I was at band practice the other day and noticed that my amp started popping and crackling. So I turned it off and it sat in the garage for about a night. The next day I get to band practice and flip my amp on and at first there were no problems. Then the popping and stuff started. I took a look 'round back and noticed that one power tube was brighter than the other.

It's a Fender Hot Rod DeVille that I bought used. So what could it possibly be?
#2
start with this




spray the tube pins with some contact cleaner, that will clean the sockets and reseat the tube. if it still crackles after that and it is not a cable or guitar or pedal or jack then maybe take it to a tech
#3
check speaker cables. one could be tired from hanging in the same direction and acts up. it has happened to me once. most likely a tube. get one. its always good to have extras.
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nope i am "GOD of the guitar forum" i think that fits me better.


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youre just being a jerk man.



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#4
Keeping spare tubes is a good idea - matched sets too, saves rebiasing.
It's an opinion. It's subjective. And I'm right, anyway.
#5
Quote by Slap-happy
Keeping spare tubes is a good idea - matched sets too, saves rebiasing.


Still gotta bias the amp, don't you? Just because the tubes are a matched set doesn't mean you don't need to bias the amp.