Posted by ScottyHOMEy on March 20, 2011 at 19:40:05 from (70.105.234.45):
In Reply to: resisters and coils posted by redgems on March 20, 2011 at 14:50:36:
Battery ignitions of the era of our tractors run on six volts.
I fthe rest of your electrical system is 12V, you have two choices.
One is an inline resitor that effectively reduces the input to a coil designed for a 6V input to the 6v it will take.
The alternative is to have a coil that is wound in a way to take a 12V input, but put out the same final voltage as the 6V coil. It's not a matter of having an internal resistor to get to that point -- its internal windings are desigend differently to accomplish the same end.
Those coils that take a direct 12V input are clearly marked as such.
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