The Voltage regulator adjusts the generator output to limit the charge rate according to the needs of the battery, and lights/electrical loads. It maintains a 7 to 7.2 volt charge rate and will top off the battery, and not over charge it. It also contains a cutout relay that is the same as a stand alone cutout relay. A generator in operation has an almost direct link to the battery negative and to ground on its frame. As long as it generates more volts than the battery it is happy. If the idle is low, or lights are on at low speeds, or the engine is off, the generator would be a direct connection to ground and thus in short order it would overheat and burn up. It would draw as much or more than it can produce. It is thus necessary to disconnect it as soon as its voltage is less than the bat voltage. The cutout does this, preventing excess discharge. The voltage regulator sees gen output, and varies the F terminal path to ground. From full ground max output, to just keeping up with a light demand, it senses the needed voltage, and grounds the F terminal appropriately. This grounding (on this A type system) is the only way the field is energized, it is fed voltage inside from the third brush, or from the Arm terminal to get its power source. Jim
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Today's Featured Article - The Fordson F Ignition System - by Anthony West. A fellow restorer contacted me earlier this year asking for some help and advice on a model F that he was restoring. He had over a period of months spent a fair amount of his hard earned cash on replacement parts for the old "trembler" ignition. Sadly though all his efforts seemed to be a waste of time and money as he still couldn''t get the temperamental old thing to run correctly!! If i said that this was a little frustrating for him that would be "conservative" in fact the problem had reduce
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