Original poster: Parpp807-at-aol-dot-com Finn, Congratulations on achieving a genuine acronym. The coil isn't bad either. :-)) I am newly interested in building an inside coil. Is the ladder grounded, and what is the downward aimed arc hitting? The coil is a beautiful piece of craftsmanship; I am sure we all look forward to reading more about it. Happy day, Ralph Zekelman