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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
blindjim OP
3,092 posts
 
Dgarretson
...again, many thanks. Like other 'tube rings' I would think these also affect sonics some too, correct?
blindjim OP
3,092 posts
 
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
dgarretson
2,594 posts
 
The Pearl Coolers do help with microphonics. The ones designed for small signal tubes include a carbon fiber mesh that slips between the tube & the vaned metal cooler.
blindjim OP
3,092 posts
 
Dgarretson
As all the tubes I'm getting are or will be NIB/NOS, MF likely won't be an issue. I've used Herbies halo rings in the past and found they do affect the sound and imaging. For the better once set rightly.

I got the names mixed up, but got in touch with PCX. $35 ea. $10 ex for matched Quad. ordered a set of 4. $30 for next day air.

OK... 6c33c-b side is done... now the bigger $$$ aspect. Eight 6SN7's.
dgarretson
2,594 posts
 
BTW I've found that when retubing 6C33Cs the occasional new output tube fails to bias up. This is usually remedied by swapping output tubes around. I've become superstitious since the time I had two output tubes on one channel arc out simultaneously during first time start-up. Since then I replace output tubes one at a time and turn up the unit for a couple of minutes before powering down and moving to the next tube. BAT recommended to me that output tubes should be discarded after two arcs-- and power output is reduced each time a tube arcs. Apparently the default operation mode of these tubes after arcing was engineered for those MIGs...
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