Re: Where does my 12 volt resistor go?

Posted by Janicholson on March 10, 2012 at 21:56:57 from (96.24.99.126):

In Reply to: Re: Where does my 12 volt resistor go? posted by 641Dave on March 10, 2012 at 21:27:07:

There are two types of coil used on conventional tractor systems. a coil with about 1.8 to 2.5 ohms of resistance, and ones that have 3.5 to maybe 4 ohms. The first are called 6 volt, or 12 volt for use with an external resistor. The second group are 12 volt coils. none have internal resistors, they are just coils of wire. The coil you choose is important to avoid burning up the points and coil, or not starting.
On the FarmallIH forum there is a greaat article from John T (an electrical engineer) on the facts. It is on the first or second page called 6 and 12 Volt Coils 101 - John T. Jim

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