100 KHz behaves like RF (essentially it is LFRF). It would seem to me that treating the design as an RF amplifier and creating a 50 ohm output on the driver to a 50 ohm input on the transformer would be feasible. Any negatives? ----- Original Message ----- From: "Sean Breheny" To: "Microcontroller discussion list - Public." Sent: Saturday, August 09, 2008 8:30 AM Subject: Re: EE > Hi Russell, > > Where did you get 16 ohms from? > > Sean > > > On Sat, Aug 9, 2008 at 7:20 AM, Apptech wrote: >>>> I have to drive a transformer primary at 230 VAC @ 14 >>>> Amps @ 100KHz. I have not yet measured the primary >>>> impedance, but I will. >> >> The impedance you see will be about 16 ohms - ie the load, >> more or less regardless of the transformer's unloaded >> impedance. >> >> >> Russell >> >> -- >> http://www.piclist.com PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist