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*To*: tesla-at-pupman-dot-com*Subject*: Re: K calculations*From*: "Tesla list" <tesla-at-pupman-dot-com>*Date*: Thu, 15 Feb 2001 11:41:44 -0700*Resent-Date*: Thu, 15 Feb 2001 11:47:32 -0700*Resent-From*: tesla-at-pupman-dot-com*Resent-Message-ID*: <ooJ9KB.A.WbH.8QCj6-at-poodle>*Resent-Sender*: tesla-request-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

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