When starting, the battery voltage is dragged to 10.8 to 11.5 volts with a good battery. In cold temps, this can be 10 volts, and it also assumes good sized battery cables. When the resistor is in use on a 12v resistor required coil, or a 6V coil, the lowered voltage is reduced to the point that spark is compromised. Thus a resistor bypass puts puts at least 10 volts into a 6v coil making great spark when needed most. When the key is turned to run, the coil is again given its rated voltage. When a 12 no resistor needed coil is used this advantage is just not there. It is commonly used on automobiles and has a history of being a standard method of increasing starting reliability. Jim
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Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
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