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Re: [TCML] secondary windings burning?

Is it better to use space wound coils or close wound coils then?


--- bert.hickman@xxxxxxxxxx wrote:

From: Bert Hickman <bert.hickman@xxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Subject: Re: [TCML] secondary windings burning?
Date: Tue, 18 Aug 2009 15:58:47 -0500

mike osipowicz wrote:
> hello, I just finished my coil, but my secondary windings are glowing
> in some small parts, when its off it leaves little black spots on the
> magnet wire coating, any ideas?
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Hi Mike,

It sounds like you may have a problem with the wire you used. Did you
accidentally overlap some portions of the winding? Did you use double
build (or "heavy build) wire? Was it brand new wire? Enamel insulation
on old wire can craze, or even flake off, and more modern insulation
systems can age and craze during winding. Since the secondary voltage
stress in a high performance coil can reach 2-3 kV per turn, using wire
with high quality insulation is essential.


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