Jon Yaeger wrote:

Almost any Sovtek 9 pin miniature tube that I've tested and that has been in
service for a few years is bad (e.g. 6922, 12AX7).

In what way?
Poor emission, ie, low gm, high noise, what?



Jim McShane says that current Sovtek production doesn't have this problem.
I'm not entirely convinced. Makes me want to stick with NOS stuff just to be
safe . . .

Anyone have a similar or contrary experience?

Jon

I have had no problems with Sovteks.

But then most amps i supplied had NOS input tubes and only the power tubes were
sovtek.

CJ use 6H30 in their 140w models.
but if you ask them or ARC how long the tubes last you may not
get a straight answer.

Patrick Turner.