Hi John T: You are right. I worked in a R&D lab at Collins/Rockwell Int in the early 1960s and most often we used a 10 to 1 rule. If the other resistor is more then 10 times the value of the smaller one, ignor the larger resistance. In any case it is seldom quality equipment will use 2 resistors together like that. Like driving one large tractor and another small tractor side by side both hooked to the same implement.. Not good.. ag.
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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