Hi Michael, > Original Poster: Michael Tucknott <Michael.Tucknott-at-virgin-dot-net> > > Hi all > > This is to the Maggie builders on the list. > > Just two qustions. > > 1-Is the secondary(driver coil)conected to ground? Yes. > 2-Does the secondary(driver coil)need a toroid if so > what size should I be aiming for. Something with just enough radius of curvature to prevent corona leakage. You can make small mags run OK without one. Malcolm