has anyone else experience this.....


i recently purchase a pair of mullards nos tube for my pv10 Conrad Johnson. I noticed after playing for a while the sounds tends to become lean and some what sterile. has this happen to anyone else, im new to mullards, I usually use Phillips mini watts or amperex nos, let me know......
kennesawjet
i recently purchase a pair of mullards nos tube for my pv10 Conrad Johnson ....

they were used.............
A point of information: "NOS" = "NEW Old Stock" = unused.

Regards,
-- Al
As usual Al is correct, although many sellers claim that they are selling NOS tubes which are actually used.
regardless, them turning lean after a short time of use is what im worried about. I talked back to who I brought them from and he informed me they were used nos tubes, I put back in a pair of Phillips/miniwatt Holland I had in before and the sound was fine again...........
There is something wrong with the tubes, (they might just be
worn out? How used is used?) or your cj PV-10 just doesn't
play well with them or you just don't like them. Maybe time
to move on.

Sorry, but what you describe, isn't what I have found to be
true with NOS Mullards. I have been using these tubes for
over 30 years and still have bunches of them left. By far
"my" favorite tube, but definitely not for
everyone. As always, YMMV...