In a message dated 7/13/00 11:08:47 PM Central Daylight Time, tesla-at-pupman-dot-com writes: << Another important secret for obtaining long sparks is to use more than the usual amount of secondary turns (by using thinner wire). >> Hi John, I have some #35 DSE, more than enuff to wind a 40 inch x 3.5 diam secondary for my next bipolar. Is that too thin? Happy day, Ralph Zekelman