David Dean wrote:
BTW I use the formula from the AARL handbook: L (uH) = 0.8 * a^2 * n^2 / (6*a + 9*b + 10*c ) where a = average radius of windings b = length of the coil c = difference between the outer and inner radii of the coil. all dimensions in inches.
That's just the standard Wheeler equation: http://home.earthlink.net/~jimlux/hv/wheeler.htm found in lots of places. _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla