Re: Secondary coil forms

• To: tesla-at-pupman-dot-com
• Subject: Re: Secondary coil forms
• From: Bill Fuller <wfuller-at-home-dot-com> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Wed, 18 Nov 1998 13:06:23 -0700
• Approved: terryf-at-verinet-dot-com

So, should I bother with coating the coil form with shellac or similar
coating??? 

Tesla List wrote:
> 
> Original Poster: FutureT-at-aol-dot-com
> 
> In a message dated 98-11-17 00:19:38 EST, you write:
> 
> <<
> > Does it make sense to place plastic spacers equally around the coil form
> > to lift the wire off the PVC to reduce the losses? This would seem to
> > have the added benefit of reducing the parasitic capacitance caused by
> > the PVC dielectric and adjacent coil wires. I would think that a "pure"
> > inductor (the secondary) and a "pure" capacitor (the top load cap) would
> > give better performance than having some of the capacitance down in the
> > coil.
> 
> > Bill
>   >>
> 
> Bill,
> 
> The PVC losses are not worth worrying about IMO, for instance if you
> eliminated all losses from the form, you wouldn't likely see any difference
> in the spark.  The capacitance is mostly isotropic from the coil to
> ground, so raising it from the form won't help.
> 
> John Freau

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