Original poster: "D.C. Cox" <resonance@xxxxxxxxxx>
It can also happen if you handle the coilform or coil with your bare
hands especially if you are a "sweaty palms" type of person. The
sodium chloride in your skin oils is an excellent conductor. After
we wind a coil, especially a magnet wire type coil, we always use
gloves to handle it. At 200-300 kV or more skin oil will track all
over the coil --- not always but usually when you don't want this
kind of problem.
Dr. Resonance
> The secondary wire itself should not be
> arcing to the form. There is no reason for this to happen.