Original poster: "Tim J by way of Terry Fritz <twftesla-at-qwest-dot-net>" <digital_raven45-at-hotmail-dot-com> Curious....I wonder how I can build a choke for a 10,550 VAC, 720mA xmfr?? What type of magnet wire do I need? How many turns needed? How the HECK do I calculate millihenries??? Any formulas around??? I really DON"T want to blow up my new plate transformer!!!!!!