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 - Fasteners: The Nuts and Bolts of Nuts and Bolts - by Curtis Von Fange. The nuts and bolts of nuts and bolts is an interesting and essential piece of knowledge that applies to our older tractors. An improperly torqued capscrew on an engine head or a shear bolt that is too hard on the driving shaft of a bushog can create havoc and make an expensive and uncalled for repair. Let’s examine the purpose and design of these fasteners in order to ensure their proper use. Fasteners are probably one of the aspects of mechanics that is given the least amount of thought.
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