Anybody know of an available 60 to 400 Hz AC power converter or 12/24 vdc to 120v 400 Hz inverter -- or easy-to-homebrew circuit? Is it feasible to modify a 12 v to 120 V 60 Hz inverter of the kind sold for use in cars? Put another way -- what do you guys use to power aircraft type gear designed for 115 vac 400 Hz? Barry