……..latest observations: I polarized the gen and ran a separate ground as well with no difference in the ammeter readings. I wired in another ammeter in series with the dashboard meter so I could watch both needles at the same time. And both ammeters react exactly the same. Soooooo, in light of Hotrod Lincolns disparaging remarks about aftermarket regulators (and his obvious depth of knowledge) I'll try out a genuine Delco Regulator. I'm using a no name "made in USA" regulator now but still not branded Delco.

Mr Hotrod Lincoln......the generator I'm using is from a '56 Chev car. In your archives do you have a part number for the correct Delco regulator ? Ebay has lots of regulators but I'd like to get the correct one for this generator.