You are correct. My thinking was based on the 20 or so amps being pushed in the first go around when the third brush was hitting the main Input (hot) brush. Now that that is operational, the three ohms # is good. I have used resistors out of heater blower motor speed control packs (from cars) to replace them. But I never checked the actual resistance. Oh well. They do need to be able to handle 20 watts or so of dissipation to be realistic. the sealed nature of the box they are in prevents much air cooling. I think the light resistor (on those I"v been into) are open wound spirals The Field resistor is the flat wound unit. There are different designs I think. JimN
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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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