Hi Matt,
That Russian tube is a very common one that many across the "big pond" use
for VTTC's. Many have had good results with this bigger fella. I would as
John says get a bigger tube if you can.
BTW, my opinion the the used Russian tube you are asking about, I would
stay away from this. Way too much browning from either a lot of use or
misuse most likely. Even though he shows filament lit up, it can be very
weak and non- emissive. Filaments all have a limited life time for
emissivity, it is not about just lighting up. Also this used tube could be
gassy, which is very bad also. You don't want any in vacuum tube. If you do
it means it is losing vacuum. Yes, there are "tubes" intentionally designed
with all kinds of different gases, but these are for entirely different
purposes and reasons. We want true vacuum tubes for our RF power amplifier
and oscillator.
Chris Reeland
Ladd Illinois USA
Sent from my LG V20
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