I have what appears to be a new Westinghouse Type RSS CV power source that is linked for 460 volt operation. Does anyone know how to link it for 230 volts? It has been tested on 460 volts and works fine. There is no changeover schematic inside the machine, and the only info I have for it is: #1 A warranty card with " S/N D4-25 ". #2 It has a 0-400 ampmeter, and 0-60 voltmeter. #3 The front panel reads "Constant Voltage Power Supply Type RSS Silicon Rectifier" with the Westinghouse logo. Any info will be greatly appreciated. Chuck