In a message dated 96-07-24 00:50:21 EDT, you write: > Without a discharge electrode sparks break out not on the toroid > >>but on the wire between the coil and the toriod - how do I stop this? > it was being warmed by induced currents. (toroid) Hi Alan, What is the construction / geometry of your toroid ? I'm curious about the eddy currents ------ Thank you, Sandy