Hi, I've been restoring an old 1944 Lincoln SA 200 welder that was given to me. I finally got it working, then it got very hot and burned the exciter coils. I rewound those myself, and now the welder is only putting out about 4.5 volts. Any ideas about how to go about fixing this? I could sure use some help and a free scematic please help me....Sure would appreciate it a whole bunch!