Re: VTTC Tubes

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

Original poster: "Alexander Rice by way of Terry Fritz <twftesla-at-qwest-dot-net>" <alex-at-rices.myip-dot-org>

29/03/2002 17:53:03, "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 All!
>
>	A stupid question, but I'll ask anyway.
>
>	Has anyone here tried to make their own 
high power triodes?  Since real
>transmitting triodes (833a's, etc) are very 
expensive, might making
>tubes be a viable option for some?

in a word, NO - vacuum tubes need exactly that 
- a very good vacuum - as in a deep space type 
vacuum needing many thousands of £££ of vac 
pump to do. in addition you would need a glass 
lathe to make the envelopes, some neato way of 
making the internals including things like 
welding tungsten, milling graphite and so on. 
That said the first valve was made from a car 
headlamp bulb, so if you ere interested it 
would not really be all that difficult to make 
a valve - just not a high power one that you 
could run in a tesla coil scenario - if you 
dont fancy the cost of vtttc's then a) 
scrounge - you can get tubes that will make 
some sort of discharge very cheply, or you can 
pull them out of old equipment b) stick to 
spark gaps

regards

alex