I should have mentioned, this generator is not the original for a TO-20, I am pretty sure someone back there, put a generator from a TO-35 which is a 12 volt, negative ground system. (and uses a 12 volt neg. gr. regulator)
All the literature I've read says the third brush should be adjustable, but if this one is, I can't find how... The third brush going to the field coil is just like the main brushes, no "lengthening adjustment," but offset from the main brushes.
The tag is long gone, no numbers or model number on the beast anywhere.
My main concern is that there is a connection between the field coil and the coils on the armature.
But nothing is shorting to ground, and it seems to be working. Although I am concerned about the 16 volt at full throttle.
Here is the schematic that seems to match this generator.
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