VTTC ponderings. (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Mon, 06 Aug 2007 16:41:08 -0400
From: Scott Bogard <teslas-intern@xxxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: VTTC ponderings.

Hey everybody.
     I am contemplating building a vacuum tube Tesla coil, I think I have a 
decent handle about how one works (I understand the schematics), but I have 
a few questions that my research has not addressed (granted, I did not take 
the time to read all 4000 matches in the archives, but I have read several). 
  Firstly, why does everybody use a separate transformer for their filament, 
most MOTs have a filament winding for the magnetron (the number of turns 
could easily be adjusted if they did not match your tubes voltage specs).  
Secondly, most schematics call for a voltage doubler, why not just use a 
second MOT, methinks this would make things easier and simpler (but heavier, 
but most are strong enough to lift 2 MOTs).  Also, many systems run on half 
wave output, why not use full wave to get twice the "on" time.  Thirdly, the 
VTTC is famous for its sword arcs, they are neat, but I still like the more 
natural looking branched arcs.  The gently flowing RF envelope of a VTTC is 
not like a disruptive coils, which starts rather abruptly (when the gap 
fires), could one put a string of sidacs in somewhere to cause the VTTC to 
switch on at half or 3/4 full power to cause the RF envelope to look more 
like a disruptive coils, and get more standard branched looking arcs, or is 
there more to the swords than the RF envelope.  Thanks a lot guys.
Scott Bogard.

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