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Re: 8-9 RFI noise thoughts. (comment on Medhurst)



Sorry that should have read:

Given  that Co =  HD
Co = s(0.015L + 0.121D) in pf
in other words:
Co = *D(L + D/2)(0.015L + 0.121D) in pf

The Medhurst data reflect a surface area vs. volume curve.
Which makes perfect sense for a capacitor.

Tesla List wrote:
> 
> Original Poster: Terry Fritz <twftesla-at-uswest-dot-net>
> 
> I think a simple relationship is extractable from the Medhurst data.
> After plotting the data the relationship is H/s = 0.015 L/D + 0.121 .
> This fits the Medhurst data with a correlation coefficient of .989,
> which by my last calculation is better than the original data.
> 
> This means that if Co = HD in pf then
> 
> Co = s(0.15L + 0.121D) in pf
> 
> where s is the surface area of the cylinder (including top and bottom
> surface areas)
> L is the length and D is the diameter.
> 
> Anybody want to check their coils?

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