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RE: [TCML] secondary corona ring... advise needed
Hello.
I always go with Dr R's recommendation that the bottom edge of the toroid
should be 1.2 times the toroid's minor diameter above the topmost winding
of the secondary. So on a 6 inch minor diameter toroid, if you take a
horizontal line outwards from the last secondary winding, you should have
7.2 inches until you hit the bottom of the toroid's minor diameter or
ducting (if that is what you used)
The toroid is the shape it is because it gives shielding to the top of the
coil. By having it high up you might as well use a sphere which are much
easier to source.
Phil
-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of mike osipowicz
Sent: 24 September 2009 01:51
To: tesla request pupman
Subject: [TCML] secondary corona ring... adivse needed
hello everybody, I searched the forums, but did not find what I am looking
for. my 4 inch coil seems to be working pretty well, Im still waiting for my
second NST, and more caps to come in... until then... I am getting corona
from the top of my secondary windings, although it looks very cool, it
cannot stay. my toroid is 4 inch dryer duct, wrapped with AL tape, nicely
smoothed, almost professional! I need a corona ring, sitting right above the
secondary windings, right? I am looking for something that is about 1 inch
diameter, does dryer ducting come in this size? I love the look of a high
toroid, but my secondary does not... thanks,
Mike o.
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