>>~My spark gap is a series gap made of 8 3" pieces of 1" copper pipe >>~There is 0.018" between each piece. That's the same type I am planning to build. How did you gauge the spacing between the pipes? Is your gap snapping and sparking well or does it buzz? T>>~Here's another general toss up question: T>>~If your secondary shorts out between two windings (as evidenced by arcing T>>~between two windings) is the tuning kaput?