Re: VTTC Tubes

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

Original poster: "Tom Stathes by way of Terry Fritz <twftesla-at-qwest-dot-net>" <newphreak_16-at-yahoo-dot-com>

Hello,

The problem with the oxygen injection method is that
the Li used will have been in oil.  This will
contaminate the vacuum correct?

--Tom


--- Tesla list <tesla-at-pupman-dot-com> wrote:
> Original poster: "Marry Krutsch by way of Terry
> Fritz <twftesla-at-qwest-dot-net>" <u236-at-earthlink-dot-net>
> 
> Hi Again.  Here is the "plan".
> 
> 	My idea was to use several thoriated tungsten 1/16"
> rods as the
> filament, window screen, or fine stainless steel
> mesh as the grid, and a
> 2-3" ID stainless steel tube as the plate.  Glass
> isn't needed, as the
> plate tube would also serve as the envelope.  I
> realize that having the
> plate out in the open isn't the safest thing to do,
> but there really
> isn't any reason to touch a running tube, is there? 
> The support
> structure would be made from wire-wound resistor
> cores (ceramics), or
> maybe some sort of porcelain plate.  The electrical
> input would be via
> spark-plugs brazed into a plug, which would then be
> brazed into the
> bottom of the plate/envelope tube.  Another plug
> would fit into the top
> of the envelope (closing the tube).  The top plate
> would have a threaded
> hole in it, which a plug would screw into.
> 
> 	Evacuating the tube would be crude, but possible
> (no vacuum pump).  The
> getter, which in this case would be lithium
> (extracted from lithium
> batteries), is cut into strips, and dropped through
> the hole in the top
> of the tube into a pan mounted to the top of the
> filament/grid module. 
> Now the fun part!  Oxygen is jetted in through the
> hole, displacing the
> air in the tube.  The plug is then screwed down
> tight, sealed (brazed),
> and the whole tube is placed in a hot oven for a few
> hours.  During this
> time, the lithium ignites, and consumes the O2 in
> the tube.  This system
> gets rid of the leftover noble gas problem.
> 
> 	Some of the evacuation procedure is questionable,
> but I will test it. 
> I have some experience with lithium, and believe
> that this MIGHT work.
> 
> 	The design is hard to follow, but it is a bit
> clearer in my mind.  It
> sure would be nice if we could find an alternative
> to expensive tubes.
> 
> Thanks for putting up with my stupid ideas. :-/
> Winston
> 
> PS- I'll try a diode first, to test the idea.
> 
> 
> 


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