[TCML] Poly thickness (does matter!)

["" <dr.hankenstein@xxxxxxxxxxxxx>]

Gary,

I beg to differ with you on this point. I used to think the same thing until we did a recent experiment: I refinished an old secondary, one I had been using for 14 years and was astonished what 20+ coats of fresh polyurethane did for the coils performance. Noted was the elimination of a "corona skirt" under the gradient ring (top load). The occasional racing sparks have been eliminated not to mention I now have the closest coulpling possible with this coil. I used to use a 1" spacer under the secondary to decouple the coil. Spark length has increased 4 to 6" as well. For more details, please check out the article I wrote on this experiment at:  http://www.audiotesla.org/corona%20experiment.htm

Regards,

Woo 


> [Original Message]
> From: Lau, Gary <Gary.Lau@xxxxxx>
> To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
> Date: 7/1/2008 10:01:59 AM
> Subject: RE: [TCML] Poly thickness
>
> I'm not convinced that coating a secondary with anything significantly improves it electrically.  Mostly it's to keep the windings from shifting on the form, and to provide a small amount of armor should something bump into it.  And probably most importantly, it just makes the coil look nice and shiny.  No matter what one coats the secondary with, it's still vulnerable to racing sparks if it is overcoupled.
>
> Regards, Gary Lau
> MA, USA
>
> > -----Original Message-----
> > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> > Behalf Of jhowson4@xxxxxxxxxxx
> > Sent: Tuesday, July 01, 2008 8:50 AM
> > To: tesla list
> > Subject: [TCML] Poly thickness
> >
> > All this talk of putting poly on coils has got me wondering (how many coats of poly
> > is enough)
> > i recently wound a 3" by 24" secondary with some #28.  first i coated the form with
> > 1 coat of poly.   then i wound the coil.  Then I put on 4 more coats of poly.  is that
> > enough? I ha\ve not had any problems with it yet.
> >
> > jay howson
>
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