Re: [TCML] DIY dent-proof Toroids

[<pterren@xxxxxxxxxxxx>]

Gapped toroids were on of the first questions I asked of the group about 10 
years ago.
No-one has shown any benefit. Presumably the e field is shaped by the eddy 
currents to expel it without too much losses.
Another matter at the bottom end though.
It is important to get the toroid height above the secondary right though. D 
C Cox had guidelines for each TC size but I dont have those.
Copy other well performing coils is simplest.
A smaller toroid below or even a corona ring seems to shape the sparks 
upward and a smaller toroid on top will do the opposite downward increasing 
primary strikes.

-----Original Message----- 
From: Mark X2
snip..
When I was making this toroid I decided to perform an experiment
with an uncovered centre plate and a non-conductive gap in the
circumference.
The hypothesis was, that this could prevent losses caused by Eddy currents
in the shorted loop a normal toroid would be.

How this gapped toroid behaves can be viewed here:
http://youtu.be/sm87H8al0U0
snip..

Regards,
Mark 

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