Coil sensitive to primary tapping

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

Original poster: "Aaron Aab" <striker754-at-earthlink-dot-net> 

Guys,

My coil is extemely sensitive to the primary tap. It refuses to make any
sparks if you move it off the last coil or so. It works best on the very end
of the last one.

Currently it is a 9kV/60Ma, 15 turns, 30X6.5"secondary, 7x24" dryer duct
toroid, 0.025uf/12kV capacitance

Any ideas?

Aaron