Jerry, THANK you, for over 50 years I have wondered about 6 volt amp gauges. I always put a meter on the generator and then looked at the dash meter and by looking at the needle position at various positions at different RPM's to get an idea. Back when we bought new regulators what was the trick to get it to work properly? Was it putting the base on the negative battery poll and just wiping a wire on the positive mark on new regulator? Or is that now done at the factory? Dad taught me that the trick on a new a new regulator had to be polarized or it would ruin the generator or not work at all. I remember doing this procedure in the day but have forgotten how. Ed