I have a LM H12-OVMYV 20V 67A Lambda Supply that has developed problems. I wonder if anyone in the forum has had any experience with this type of supply. When I put it under load, 10 to 15 amps draw, the voltage drops way down. If I put a full load on it, it will draw about 20 amps according to the amp meter on the supply but the regulated voltage which I have set to 13.8 DC drops way down. I do not seem to see any visible issues. No ripple noticed on the scope. I have not been able to find a Service Manual or schematic diagram for this supply. I have a 120 vac step up transformer I used to use to feed it the 208 volts it needs. For a number of years I have been feeding it with 120 vac without any problems and much less heat developed in the heat sick. It would only yield about 45 amps but that was more than I needed.
Any comments on this problem or availability of a manual would be much appreciated.
Any comments on this problem or availability of a manual would be much appreciated.