Re: Secondary coil forms

• To: tesla-at-pupman-dot-com
• Subject: Re: Secondary coil forms
• From: Esondrmn-at-aol-dot-com (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Tue, 17 Nov 1998 12:10:30 -0700
• Approved: terryf-at-verinet-dot-com

In a message dated 11/16/98 9:19:38 PM Pacific Standard Time, tesla-at-pupman-dot-com
writes:

<< It seems like the most common coil form is PVC pipe. I have seen post's
 that discuss coating the pipe with a low loss insulator since PVC is
 apparently lossy. 
 
 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
  >>

Nikola recognized this and comments several times in his notes, I believe,
about minimizing or reducing the self capacitance of the secondary.  According
to the formula, as the secondary capacitance approaches zero, the secondary
voltage approaches infinity.

Ed Sonderman

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