So, I have a salvaged transformer that will output 22 volts with no load. I have no idea what it was I salvaged it from. It was some sort of TV channel selector with a remote. But anyways, I have no ratings for how much current it can output. Is there a way to figure this out? Would it be a good idea to use this transformer or should I just go out and buy a transformer so that I know the ratings of it?