Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com> If you send me a SASE I will send you the protection circuit we use with all our NST powered coils. Dr. Resonance Resonance Research Corporation E11870 Shadylane Rd. Baraboo WI 53913 > > And a 15kv 30ma NST for power, Still have to figure out the filtering > protection for > > it though.