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Re: [TCML] A New Kind of Valve Coil



Thanks, Phillip - very interesting videos!

I found the evolution of the heavier/hotter portions of the channels from (mostly) straight to writhing and tortuous forms especially interesting. The relatively slow evolution implies that helical discharges often observed with VTTC's or other slow-envelope systems may be mainly due to thermal effects and turbulence/vortex formation. If the discharges were being driven by electromagnetic forces, the effect might occur much earlier in spark growth. Good stuff!

Bert
--
Bert Hickman
Stoneridge Engineering
http://www.capturedlightning.com
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Phillip Slawinski wrote:
Hi All,

I just wanted to share my project of the past few months with the
list.  It's a new type of valve coil.  Gone are the microwave oven
transformers, and in their place is a digitally controlled power
supply.  This is basically the Valve-based answer to Steve Ward's QCW.
Credit goes to Steve Ward for help with the design of the frequency
modulated SLR power supply.

If you want more details, just ask.

Here are some videos.

Overview of the system ->  http://www.youtube.com/watch?v=Oman-AoXXSo

1000FPS video of spark growth (48" sparks) ->
http://www.youtube.com/watch?v=YNAgG6DqRQE

-Phillip Slawinski
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