K calculations

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

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.