Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>" <Parpp807-at-aol-dot-com> In a message dated 1/2/01 10:15:26 PM Central Standard Time, tesla-at-pupman-dot-com writes: << F = 1/(6.823xsqrt(LxC)) >> Hi John, Think you meant 2pi = 6.28 I read all your postings. :-)) Cheers, Ralph Zekelman