Every 6 or 12V Delco I have ever seen was type A. Every 6V Autolite I have ever been around was type B. I have seen a type A Autolite that was 12V. Both control output via the field. The differance being a type A always has full voltage feeding the field and controls output via the ground while a type B field is always grounded and the control is via the input voltage. Your information is valuable as the number of people who understand these systems shrinks daily and a whole lot of well intended guesses are wrong. Thus we have major sales of one wire alternators. Luckily I was schooled in them and manage to keep all of my stuff original and properly operating.
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Today's Featured Article - Harvestin Hay: The Early Years (Part 2) - by Pat Browning. The summer of 1950 was the start of a new era in farming for our family. I was thirteen, and Kathy (my oldest sister) was seven. At this age, I believed tractor farming was the only way, hot stuff -- and given a chance I probably would have used the tractor, Dad's first, a 1936 Model "A" John Deere, to go bring in the cows! And I think Dad was ready for some automation too. And so it was that we acquired a good, used J. I. Case, wire tie hay baler. In addition to a person to drive th
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