Careful. Some modern wire on hv is resistance wire, including alot used on tube modern tv's. It was used to leave out carbon resistor in hv filament supply, a cost cutter. Also, is winding arcing, or filament winding. Usually if filament winding is arcing, it arcs to core. If hv donut is arcing could be shorted turns. Look for pin-holes in insulation. Not always there in early stages, but, one sure fire way of seeing problem. I've had flybacks where flyback checker said it was good, but, under actual load conditions, due to insulation breakdown, donut would arc. Bill Cahill
