James wrote: >L = Ur ((Number of turns Squared)(Area of the Core's >Diameter)/(Lenght of Core))(1.26)(-10 to the 6) > >Ur = Greek symbol mu and = Permiability (1.26) is a constant. Uh, care to tack some units on those variables? (probably meant 10^-6 also...) -Bill ______________________________________________________ Get Your Private, Free Email at http://www.hotmail-dot-com