09-06-2019, 05:10 PM
Jamie, I think to answer your original question regarding what you need to do, to use the existing dynamo at 12 volts needs a 12 volt battery, then the best way seems to be to do away with the third brush and use an electronic regulator designed for the job, and field coils wound with more turns of thinner wire. This provides extra resistance in the field coils. Getting the armature re-wound as well might be the icing on the cake, but it seems not many do that.