Original poster: "Mike Osborne by way of Terry Fritz <twftesla-at-qwest-dot-net>" <mikeosborne-at-prodigy-dot-net> Hi All: I came across a 9KV 30ma NST and want to design a small desk top coil with it. Anyone out there know where I can get some good TC design software? Mike Osborne mikeosborne-at-prodigy-dot-net