29-12-2018, 10:23 PM
(29-12-2018, 12:23 AM)john williams Wrote: Rob, firstly you were correct in questioning my arithmatic regarding extra field resistance. 6 ohms is the standard field resistance on Lucas C40 dynamos. Ideally on the conversion you need to add a resistor that will bring your modified total field resistance to 6 ohms. I now add the additional resistor between the third brush box and the earth brush box, instead of at the dynamo terminal block, so at first glance you cannot see the dynamo modification. This system will only work with a Lucas RB109 or equivilent. John
Hi John, thanks for generously sharing information here. I have googled RB109 regulator, nothing comes up, plenty of 106.What is an equivalent of an RB109 please.
Also Could I use a wirewound resister of the type sold by CPC or Rapid. As well as being the correct ohms requirement I image the wattage would also need to be quite high, any suggestions?
Best Wishes Gene