I am looking for a schematic for an old Miller SRAC-3 Welder (400Amp DC 500Amp AC). I have tried Miller without success as their records do not go back that far (was manufactured in the 50's). Specifically, I am looking for tap switch connections for both the range and AC/DC tap switch. Any information appreciated (even direct me to someone who may own one).

Thanks much,

Mike
michael@protulipac.com