RE: [TCML] 40AWG secondary coil

[Christopher Karr <chriskarr4@xxxxxxxxxxx>]

Ralph,

Thank you. The chart I was using was assuming bare wire.

- Christopher

> From: sparks@xxxxxxxxxxxxxx
> To: tesla@xxxxxxxxxx
> Subject: RE: [TCML] 40AWG secondary coil
> Date: Sun, 28 Dec 2008 22:26:40 -0600
> CC: 
> 
> > Since TeslaMap didn't have a 40AWG option for secondary wire,
> > I had to do my own calculations -
> >
> > Using a wire diameter of 3.14 mils to represent the diameter
> > of the 40AWG wire, I divided '1' by '3.14' and multiplied by
> > one-thousand so that the number would be how many winds per
> > inch, instead of winds per mil. I took that number and
> > multiplied it by '7', the intended number of inches for the
> > secondary's windings in length; I came to the answer of
> > 2229.29 winds in seven inches, with a height:diameter of
> > 1:4.66(etc.), which is acceptable for small coils.
> 
> The ARRL Handbook copper wire table says that #40 enameled wire should
> give 282 turns/inch.  Figuring 280 TPI for a calculations, that's about
> 1960 turns.
> 
> 73,
> 
> Ralph   W5JGV - WD2XSH/7
> 
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