Re: K calculations

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

Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-uswest-dot-net>" <evp-at-pacbell-dot-net>

Tesla list wrote:
> 
> Original poster: "Peter Lawrence by way of Terry Fritz
<twftesla-at-uswest-dot-net>" <Peter.Lawrence-at-eng.sun-dot-com>
> 
> Paul Nickolson et al.
>                      have you, or anyone else, ever come up with a "simple"
> formula for K (primary-secondary coupling) based on geometric measurments.
> Simple meaning on the order of the L = N^2*R^2/(9*R + 10*H) complexity
> and accuracy. It sure would be useful if such a thing existed.
> 
> -Peter Lawrence.

	Sorry, but it just isn't that simple.  Your approximate formula for the
inductance of a solenoid is just that, and accurate over a limited range
of R/H.  There is a way to calculate the coupling for two concentric
coaxial coils of the same diameter, but that isn't the way most TC's are
built.

Ed