Re: AWG WIRE TABLE for Coilers (fwd)

To: tesla-at-pupman-dot-com
Subject: Re: AWG WIRE TABLE for Coilers (fwd)
From: Tesla List <mod1-at-pupman-dot-com>
Date: Fri, 1 May 1998 09:59:01 -0600 (MDT)
Approved: mod1-at-pupman-dot-com

---------- Forwarded message ----------
Date: Thu, 30 Apr 1998 20:32:50 -0700
From: "Antonio C. M. de Queiroz" <acmq-at-compuland-dot-com.br>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: AWG WIRE TABLE for Coilers (fwd)

Jim Monte wrote:

> Using exp(a+b) = exp(a) * exp(b) and
>       x = exp(ln(x)), x>0,
> Alfred's formula translates to
> d = exp(-0.1159489226967782 * gague - 1.125292573941649)   -- in inches
> d = exp(-0.1159489226967782 * gague + 5.782462705040488)   -- in mils
> 
> So the two are essentially the same -- it's good to see formulas that
> agree!  From a computational standpoint, this form is somewhat better
> than the one Alfred gave since it trades an addition/subtraction for a
> division.

Do someone know what is the official formula? and the reason for it?
All these expressions generate some error when compared with the values in
my table in the Ref. Data for Radio Eng. My expression I obtained from the
values for #10 and #30. It is precise for these gauges, but disagrees
slightly (<0.1%) for other gauges.

To include a related question closer to Tesla coils: What is the thinnest
wire that you members of the list have used in a successful Tesla coil?

Antonio Carlos M. de Queiroz
http://www.coe.ufrj.br/~acmq