Hi: Just a note: The proper name for a terminal with the shape of a torus is "toroid", not "torroid" as I frequently see here and in Tesla coil www pages. If you want to verify (I checked, as English is not my first language) look at: http://www.m-w-dot-com/netdict.htm Antonio Carlos M. de Queiroz <<<< I used to spell it "toroid" then I changed to "torroid" because I thought that was correct. :-0 I was not in my dictionary... - Terry >>>>