Re: vacuum tube construction. (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Sun, 12 Aug 2007 22:04:42 -0400
From: khalil@xxxxxxxx
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: vacuum tube construction. (fwd)

Quoting Tesla list <tesla@xxxxxxxxxx>:

>
> ---------- Forwarded message ----------
> Date: Sun, 12 Aug 2007 17:02:40 -0400
> From: Scott Bogard <teslas-intern@xxxxxxxxxxx>
> To: tesla@xxxxxxxxxx
> Subject: vacuum tube construction. 
>
> Hey guys. 
>      We build all sorts of things for our coils, capacitors, hand wound
> transformers, all kinds of ballasts, Has anybody tried to build a vacuum
> tube for a tube coil?  It sounds slightly crazy, but several of us, with
> varying degrees of success have built plasma globes, Geisler tubes, etc,
> which require a vacuum (although they are generally backfilled some with
> noble gases).  If you were building it yourself, you could make it rather
> large, to drive a rather big VTTC.  Just curious. 
> Scott Bogard. 
>
It would be of hard (if not nearly impossible) to build a high powered vacuum
tube. Where would you get the filament and if you wanted a cathode what would
it be made of to emit enough electrons to be practical? How would you make the
grid acuratly enough to work properly? I was just thinking it would be 
too hard
and time consuming to try to build your own and it's just better to buy one.