My friend and I built a tesla coil as an 8th grade science project back in 1962. We used an old transformer to convert a/c current to d/c current. We hand wound the coils, used erector set steel through wax seals into a salt water containers for the condenser. It received the blue ribbon and went to the Oregon Museum of Science and Industry that year as a finalist. To watch the arc was spectacular and the gas given off was OZONE.









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