toroid size

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Gregory Peters by way of Terry Fritz <twftesla-at-qwest-dot-net>" <s371034-at-student.uq.edu.au>

Hello all,

Does a 12"x46" Al duct toroid seem too large for a 8-10kW 12" 
diameter coil running at 200BPS? That is what I am currently using, 
and the coil will not break out without a sharp point. If I remove 
the sharp point, the secondary gets severe racing arcs, so hot that 
the coil immediately is ruined and needs repairing (no sparks break 
out of the toroid). The coil makes over 10 foot sparks with the 
breakout point, and I would have thought it would have no trouble 
with a toroid this big, even without the breakout point. Ideas, 
suggestions? I'm thinking of switching to 100BPS operation, but I'm 
scared I'll fry another coil.

Cheers,

Greg.