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RE: SMALL SPARKS: PLENTY OF POWER- NO TIME

Original poster: Jim Lux <jimlux@xxxxxxxxxxxxx>

At 10:05 PM 10/25/2005, you wrote: 
Original poster: "Ralph Zekelman" <gridleak@xxxxxxxxxxxxxx>

Gary,

I regularly use helical coils with the half-wave twins and bi-polars.  I
wind 1/4-inch Cu tubing to allow around 2-inch spacing to a 3 or 4-inch
diam secondary. There is no problem with racing sparks. I do not understand
why the helical primary seems to be in disfavor with many coilers since
many of the historical *Tesla era* photos show a helical coil.

Ralph Zekelman

I think that flat pancake style primaries help with E field control. They provide a good counterpoise for the topload