Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Hollmike-at-aol-dot-com> In a message dated 7/14/01 8:13:57 PM Mountain Daylight Time, tesla-at-pupman-dot-com writes: << what is an aspect ratio >> It is the ratio of the winding height of the coil to its diameter(not to be confused with the length of the coil form). Mike