3-brush generators

On the light switch type of generator regulation my best guess is (depends on the particular genny) the value of the fixed resistor is somewhere around 1.5 to 3 ohms and, of course, the lower the ohms the more genny output, so you may wanna try 3 first then work your way down to 1.5 to see at what rate she charges with it in the field to ground circuit until you get the rate desired. You could use a series or paralell combination of a couple low ohm power resistors similar to an ignition ballast resistor which are somewhere aorund 1.5 to 1.85 ohms n see what charge rate you get !!!!! Let us know, best wishes

John T

Find an H or M Farmall with a cut out relay system instead of the combination cut out voltage regulator system an measure it with an ohm meter. I think Farmall changed in late 1949 or early 1950. Let us know what you find.

In any case.. low ohm values will be used here.. think in the 1-5 ohm value, depending on your specific machine.. and what charge level you are trying to achieve..

Soundguy