Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Fucian-at-aol-dot-com> In a message dated 2/22/02 10:40:13 AM Eastern Standard Time, tesla-at-pupman-dot-com writes: << When you go down in frequency, remember to add more primary turns so that you don't overpower the mosfets! >> Could i try adding a power resistor in series with the primary instead of more turns? Matt