Anybody know a reputable cryo treatment facility that isn't too expensive and will do batches of tubes (preferred). I want to do one of my Mullard rectifiers and a matched quad of Gold Lion KT-88 reissues, plus probably a few more.
Thanks,
Jim
Does John at Black Sands still do cryo?
https://www.tubeworld.com/kuhltube.htm#
http://www.tubedepot.com/bsctfaq.html
I can recommend buying tubedepot cryo tubes, but can't predict safety of your tubes. I never used tubeworld, but they specifically describe the slow cool and warm process, 8 hours each, with 36 hour soak!
Rich