Tired tubes?

[jimbones]

Hi Is it possible for a power tube to test good but be "worn"? I recently bought a preowned amp that uses Winged C 6550 ( date codes are from 2001 and 2006) I tested all the tubes discarded the bad ones but was wondering, is it possible that the tubes test good but are really not at the top of their game sonically? The previous owner did not give me an estimate of the hours on the tubes but I suspect from their answer it was significant. Amp is a CJ Premier 12.

 

[Addicted to hifi]

Hi Is it possible for a power tube to test good but be "worn"? I recently bought a preowned amp that uses Winged C 6550 ( date codes are from 2001 and 2006) I tested all the tubes discarded the bad ones but was wondering, is it possible that the tubes test good but are really not at the top of their game sonically? The previous owner did not give me an estimate of the hours on the tubes but I suspect from their answer it was significant. Amp is a CJ Premier 12.

Nice amplifier.I would try new tubes in it and see if the sound is better or not.

 

[Lowrider75]

Hi Is it possible for a power tube to test good but be "worn"? I recently bought a preowned amp that uses Winged C 6550 ( date codes are from 2001 and 2006) I tested all the tubes discarded the bad ones but was wondering, is it possible that the tubes test good but are really not at the top of their game sonically? The previous owner did not give me an estimate of the hours on the tubes but I suspect from their answer it was significant. Amp is a CJ Premier 12.

There is a range in the measurement of a good tube. The tube may be near the bottom of that "good" scale which can mean it has many hours and may work ok in some circuits. But I wouldn't call this a usable tube.

 

[jimbones]

OK so I tried some of my buddy's EH KT88 and the amp complained and blew a fuse so I immediately removed them and put back in my 6550's and everything is working and I am not going to screw around rolling power tubes. I will only put in 6550s lol