Toroid info wanted (fwd)

---------- Forwarded message ----------
Date: Wed, 22 Apr 1998 16:25:35 -0400
From: Alan Sharp <AlanSharp-at-compuserve-dot-com>
To: "INTERNET:tesla-at-pupman-dot-com" <tesla-at-pupman-dot-com>
Subject: Toroid info wanted

Mick wrote:

>Help--can any body tell me why some coils have there toroids standing
off the top.
Also what is the best way of mounting the toride.And is it best to make
it adjustable. <

The toriod has two advantages - top capacitance stores energy, the large
surface area has a higher breakdown voltage - longer sparks. You want it
to the coil, to electrostatically screen the top of the winding, preventing
breaking out from the wires. But too close and you'll get lots of sparks
toriod to the strike rail. Also if its too close it acts as a shorted turn
and wastes
some energy.

Alan Sharp UK.

The first UK Teslathon will take place on.
Saturday 30th May, 11am,Corby, Northamptonshire.

My web site:
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coiling, UK component sources.....