Newbee -
Don't mean to beat up on the Tube Store if it's the manufacturer's quality issue. Also, just to be clear... the expected life/hrs they cited for the power tubes was well over 1000. When writing last night I couldn't remember the exact number so I just wrote >1000. It might have been in the range of 1200 or 1500 hrs. In any case, I expect they were being conservative though, as you can see, 2 JJ Tesla KT88s never made it nearly that far.
I did buy Ei Elite 12AX7s and NOS Mullard 12AT7s from them and those are still working just fine.
The Tube Store order fulfillment service has been great though I was not impressed with their matching service.
I didn't really appreciated that a tube failing suddenly could cause damage beyond a blown fuse. Thanks for the warning.
Don't mean to beat up on the Tube Store if it's the manufacturer's quality issue. Also, just to be clear... the expected life/hrs they cited for the power tubes was well over 1000. When writing last night I couldn't remember the exact number so I just wrote >1000. It might have been in the range of 1200 or 1500 hrs. In any case, I expect they were being conservative though, as you can see, 2 JJ Tesla KT88s never made it nearly that far.
I did buy Ei Elite 12AX7s and NOS Mullard 12AT7s from them and those are still working just fine.
The Tube Store order fulfillment service has been great though I was not impressed with their matching service.
I didn't really appreciated that a tube failing suddenly could cause damage beyond a blown fuse. Thanks for the warning.