Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>" <evp-at-pacbell-dot-net> > Pat; A simple diode in series with your primary will cut your voltage in > half. > Robert H Whoops! DON'T DO THAT!! You'll be passing DC through the primary and will probably let all of the smoke out of the transformer unless the diode opens first. Ed Ed