I read in my old Motors shop manual that most all regulators will operate on either pos or neg ground . The only difference being that some have the two cutout or field relay contact points made of different metals to reduce the transfer of metal from one contact to the other in the regulators marked for a specific polarity. They say that runing one of these regulators on the wrong polarity will result in slightly shorter contact life, so not a big deal.
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Today's Featured Article - The Ferguson System Principal An implement cutting through the soil at a certain depth say eight inches requires a certain force or draft to pull it. Obviously that draft will increase if the implement runs deeper than eight inches, and decrease if it runs shallower. Why not use that draft fact to control the depth of work automatically? The draft forces are
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