6P6S - Any one used these?

[atmars]

i did a search here for any info on the 6P6S - an eastern block equivalent of the 6v6 -I didn't find much on the forum . Has any used them in a guitar amp? Any reviews?

[Wakculloch]

I bought a load of them, and so far they a holding up well. Did some un-scientific matching, and they came out reasonably uniformly. I have four in my main giging amp that have been good for about a year. Just put some in a DRRI that seem so far to be good; and identical to the "groove tube" branded valves i took out.

[GainFreak]

I also have a dozen but never used them so far.
Just a note if you're buying NOS russian tubes look for the additional "E" or "EB" letters which mean longer life and/or military version.