Tubes for BAT VK60. Need help



I’m now looking to retube a BAT VK60. I know very little about the tubes in it or which ones are most important to address first... or at all.

Any VK 60 owners with re-tubeing experiences out there?

I surely would appreciate some input on what you wound up with and why...?

Thanks so very much for the time and efforts here, as I'm lost now.
blindjim
Chris at Parts Connexion stated to me that upon request he will test each 6C33C and offer a 90-day warranty.

After many retubings of 6C33Cs in the VK75SE without Pearl Tube coolers, I noted (subjectively) about a 50% extension in tube life with the Coolers. I now use them everywhere, particularly with hot-running & valuable 6H30-DR input tubes. However I don't think the Pearl Coolers extend tube life 2x-5x as claimed.

Dgarretson

Super! Thanks. Does Parts Ex. do the coolers too? I'll Google 'em.

I think for the $40 diff of the Ruskies, and the time frame to get them from there to here, I'll call and order the 33's from them.
Parts Connexion has the Pearl Coolers or you can get them directly from Pearl. For the hot power tubes, make sure you get the 3" tall Coolers with the red silicone O-rings. The black rubber rings dry out and break after awhile.
Dgarretson
...again, many thanks. Like other 'tube rings' I would think these also affect sonics some too, correct?
nO LUCK YET but I'm closing in... I now know who does not have 6c33c-b tubes for sale: Parts Express, Antique Electronics. Alan welch, & Vintage Tubes. Searching here provides zip as well.

Best so far is $40 ea + ship. More for matched