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Re: [TCML] Question about vacuum tube Tesla coils





I've got a question about vacuum tube driven Tesla coils.  Every one of
these I've seen produce distinctive-looking sparks - the link below to Roger
Smith's TC is a great example:

http://www.flickr.com/photos/29248051@N02/6104333777/in/photostream

What is it about using a vacuum tube to drive a Tesla coil that creates
these sparks? I am guessing it has something to do with thermionic emission
speeding up the electrons as they leap across the tube.  Please correct me
if this is wrong.
  I'd think electron speed across the tube is  irrelevant.
  Spark gap class coils generate a 'damped' Oscillation.
It rises in voltage over over a few cycles, then falls. The typical VT coil
  generates a 'continuous', constant voltage oscillation.  The sparks will
  be different...

--
best
dwp

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