To borrow from Marty's idea....... Has anyone tried to see if these inverters can be altered to make 400 cycles instead of 60? Jack Jack Antonio WA7DIA scr287 at sbcglobal.net Unserviceable but Repairable wrote: r > (7805), then a 95W cig-liter 115V inverter into a bridge rectifier / choke-input filter. 90V for both TX & RX.