Original poster: "K Wilson" <teslamap-at-hotmail-dot-com> You know, the primary doesn't *have* to be, ummm, circular...;) Octagonal might be nice. Dan K. I was alreary thinking the same thing. Has anyone wound a primary with 12 or 14 AWG bare stranded copper? Do you think the corners would create corona problems? Would the wire be able to handle the current (15, 60 NST)? _