Re: Secondary coil forms

• To: tesla-at-pupman-dot-com
• Subject: Re: Secondary coil forms
• From: FutureT-at-aol-dot-com (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Tue, 17 Nov 1998 12:04:00 -0700
• Approved: terryf-at-verinet-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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