Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Beans45601-at-aol-dot-com> I was looking at the TC at the children's museum that I work at and I noticed that the primary coil was grounded to the NST case. I have never seen (or herd of) this done before. Is this the reason that the coil is getting such poor performance? Thanks Adam