Dynamator refurbishment

[Dave Mann]

Back in the early 1970s I tried a two brush C35 with a RB 106 regulator for a 12 volt conversion and soon realized that the regulator couldn't handle the field current so I converted the C35 back to 3 brush binned the regulator and fitted a 12 volt CF 3 cut out which I ran for 10 years with no problems. In the mid 1980s I took my boss's alternator in for repair in a 6 volt Seven, when I collected the repaired alternator the guy who'd spotted my Seven said what you need is one of these. It was a 12 volt alternator regulator which cost £4.50, over the next few days I worked out how to wire it up using an old 12 volt battery off our Cortina and the CF3 cut out fitted with a 33 ohm resistor and a two brush C35, It worked well so I went back and bought another regulator as a spare to go under my seat. In due course our other two RNs were equipped with the same set up. Over the following 30 years I had one regulator fail, which at £4.50 didn't break the bank, this caused a problem as the business closed when the owner died and it took me a while to source a replacement.