I am trying to rewind a microwave oven transformer secondary using 10 gauge wire on the inside, to get approximently 45 volts from 110 volts on the primary. The transformer is two E core sections, with a current limiter. I get approximently 1 volt per turn, and the E section for the secondary is too small. Could I wind the secondary outside the core? Could I combine winding the inside and outside of the core?