11-03-2019, 08:59 PM
Before the field brush decided to shed its wire ( after I had washed it on Sunday and started it to put it to bed!), the dynamo charged at an indicated 10 amps, which was just enough to support the sidelamps and dipped beam ( I am on single dipping headlamps), so I think I shall leave the third brush alone. If I make up a long enough resistor coil, I can presumably find the optimum position on it to give me a suitably reduced charging rate and then trim it to length.