a friend has an old gas driven gen from 20's era which he said came from a drag line or shovel, he wanted to know if it is ac or dc , and is it feasible to convert to a/c for home for backup power , the only thing on this gen is an old fusible disconnect and a large resistor and no nameplate ? when running the voltage is erattic up to 500v, how can i determine the source type i used a multi meter and it reads on both ac and dc?
