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[quote:3de69ffaf8]".... did they use a 12 volt coil with a built in resistor back in lets say 1964?"[/quote:3de69ffaf8]
12 volt coils have been installed on Ferguson tractors since the TEA20 went from 6 volts to 12 volts around 1949 - 1950. Whilst US built cars retained 6 volt ignition into the 1950s, UK and European cars were generally 12 volt ignition from the 1920s.
I don't believe there is such a thing as a "12 volt coil with built in resistor".
There are 6 volt coils, there are 12 volt coils; and there are those owners who are too tight to buy a $15 12 coil when they upgrade, so install a resistor in series with the 6 volt coil to drop the primary voltage back to 6 volts. Then wonder why they have starting and running problems........ :lol:
This post was edited by Bob (Aust) at 23:12:10 12/05/13.
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