The older ones are relatively simple. They usually have an ac transformer with multiple taps ( wires coming off the transformer at different voltages), these wires go to the charge selection switch. The AC is converted to DC in the rectifier (often some kind of plate that holds the diodes. The heavy DC cables are connected to the output side of the rectifier, hopefully the DC side has some kind of overload device (breaker). The rectifier is usually the problem. If the smoke has been let out of the actual transformer, the unit is scrap. I have found replacement rectifiers on-line, a direct replacement unit is not required. I replaced the rectifier in one of my solar's with an upgraded unit and it works much better. You can replace individual diodes in the rectifier also. Hint, when replacing diodes the wire in the actual rectifier is high temp wire and may be fragile. Replace any that are damaged with the wire used in a stovetop burner, use the high temp push on connectors also. The guys on this forum can assist you in the repair, show them the picture and they can fix anything.
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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