Quote:
Originally Posted by Tom9589
How are these 6T8s failing? Is the filament burning out? Are certain elements shorting out? Has the emissions gone down to zero? Failure in the triode section or failure in the diode sections or failure everywhere?
The nature of the failure might tell you what is taking them out.
|
I just all of the sudden have either one or two sections coming out completely dead, no emissions whatsoever, the filiments are still lighting but just no emissions, completely dead according to the tube tester, its usually the first two sections of the 6T8 tube that fail in that manner.
I have had it where the first section was dead and section 2-4 were fine, and I've also had one fail where sections 1, 3 and 4 were fine and section two was dead, and I've also had one where both sections 1 and 2 were dead and sections 3 and 4 were fine, so I don't know what to make of that failure pattern or that particular type of failure where various combinations of the first two sections of the 6T8 tube fail but the rest of the tube is fine, as I have never had this happen to me before.