Re: Mini VTTC--Possible tubes?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>" <evp-at-pacbell-dot-net>

Tesla list wrote:
> 
> Original poster: "David Sharpe by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <sccr4us-at-erols-dot-com>
> 
> Matt, Carl, All
> 
> Another excellent mini-VTTC tube is an 807 (6.3VAC fils) or 1625 (12.6VAC
> fils).
> Use in same sweep tube circuit previously mentioned.  Plate P ~ 30W, Vbb
+750V
> Vsg +300V.  One tube single ended about 90W out, 2 in push-pull will net
about
> 100W.  Actually successfully ran 6 807WA (ruggedized 807) as 3 in
parallel x 2
> banks push pull at 800V.  600W input, about 450-500W to resonator to drive
> a IR laser tube (yes it worked by at <10micron pressures  :^?)  got on a
video
> around here somewhere...  About 1 1/2" - 2" plasma torch style discharge
> (lot of
> heat!!!)
> 
> Regards
> Dave Sharpe, TCBOR

	Thought about the 1625, but don't know if there are any around
anymore.  In the '60's they could be had at two bits each as they were
used in the USAF HF "command transmitters" and were available in almost
unlimited quantities.  In addition to the 12 volt heater, they differ
from the 807 in having a large 7-pin base.

Ed