[Paul Philco322]

I have no tube tester, poor widdle wold me, boo hoo. I usually use the old tube hunting strategy. I do have a question for those who have been at this stuff for a while. When a tube tests OK and then is playing in a set does it tend to degrade slowly over time or go pop?  I have had sets play fine and then sound weak and erratic fairly suddenly. Often a rectifier or audio output is the reason. Do these tubes tend to just blow because of higher voltages? Even after being fine today then poof tomorrow. I am imagining the other tube types may just get weak and then fail.

By far most tubes I change out are rectifiers or outputs. Another reason to go to the swap meet, tubes reasonably priced. 

Your thoughts appreciated.

Paul