Re: Awg formula, was "New formula for secondary resonant frequency"

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Barton B. Anderson by way of Terry Fritz <twftesla-at-uswest-dot-net>" <tesla123-at-pacbell-dot-net>

Hi Paul, 

I'm still coming up with 17.5 using your formula (I assume your using something
other than 1.0236mm for 18 awg?). I used a calculator and Excel but get the
same results. 

I kept the long decimal places for accuracy -  I saw no reason to shorten them
up since I used it simply as a formula in programs. Nominal wire sizes taken
from the Brown & Sharpe American Wire Table. Possibly, this is where the
discrepancy exist? 

Bart 

Tesla list wrote: 
>
> Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>"
> <paul-at-abelian.demon.co.uk> 
>
> Concerning wd to awg conversion, 
>
> Bart wrote: 
>
> > For example, 18 awg = .0403 inch or 1.0236 mm (nominal). Paul's 
> > shows 17.5 awg. The above formula shows 17.99 awg. 
>
> My formula gives 18.000615 and a bit, which I think is slightly 
> closer than Bart's. 
>
> Bart, do your many decimal place factors relate to USA inches, 
> UK inches, or Canadian :)) I fully recommend the use of SI units for 
> this kind of work. 
>
> Cheers, 
> -- 
> Paul Nicholson, 
> Manchester, UK. 
> --