Re: Mini VTTC--Possible tubes?

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

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <FutureT-at-aol-dot-com>

In a message dated 3/5/02 10:17:16 PM Eastern Standard Time, tesla-at-pupman-dot-com
writes:


>
> Hi, 
> I have decided to start a VTTC.I was wondering,what sorta tube is needed?I 
> want the smallest and cheapest possible tube to start with.Can someone give 
> me a list of possible tubes?Or what do i need to look for?
>
> Thanks so much,
> Matt
>
> Matt,     The proper types of tubes are transmitting triodes, an

d

power triodes.  Tetrodes and pentodes can work, but are more
trouble sometimes.  The smallest that can work are tubes such
as the 807's, 815's, and 6146's. These can't withstand much
voltage though, and tend to burn up and arc inside.  A much
better tube is the 811A, which can give a 4" spark or so.  They
can be bought for $5 to $15 or so.   Then there's the 4-125A,
4-250A, 304TL, 833A, 4-1000A, 3-500Z, 805, 845, 838, 813, 
572B, HF300, EE200, 4-400A, etc, which are more expensive,
and suitable for larger coils.  

Cheers,
JOhn