In simple terms you have 2 types of coils one is a true 12 volt no ballast resister needed and will only work on 12 volts because it is of a higher resistance then the normal 6 volt coil. Then you have a coil that is 6 volts and all coils that are marked ballast resister needed are in fact true 6 volt coils. Yes this is just a simple way of saying things that could be gone into in terms many would not understand unless your an E.T. like I was years ago in the navy
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Today's Featured Article - Tractor Hydraulics - The Basics - by Curtis Von Fange. Hydraulics was one of the greatest inventions for helping man compound the work he can do. It’s amazing how a little floor jack can lift tons and tons of weight with just the flick of a handle. What’s even more amazing is that all the principals of hydraulic theory can be wrapped up in such a small package. This same package applies to any hydraulic system from the largest bulldozer to the oldest and smallest tractor. This short series will take a look at the basic layout of a simple hydraul
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