On Wed, 18 Jan 1995 luckett@ibm.net wrote:
> Paul McBride writes:
>
> < Your Lucas coil runs ok because it does not need a
> < resistor. The others you tried probably require one to keep
> < the coil from overheating.
>
> I guess the question which then comes to mind is whether there is
> a way to determine what type of coil you have grabbed out of the
> spare parts box.
>
> Is there a reliable way?
>
I'm working from (dim) memory here, but it seems to me that most Lucas
coils I've seen are marked 6v or 12v; they might even have references to
use with ballast resistor on them somewhere. I'm not anywhere near my
garage to check this.
Is it possible, though, that the original poster (which I've long since
deleted) might actually have been referring not to a ballast resistor but
to a capacitor? I don't offhand recall seeing these on TR4 coils, but I
have seen them on MGA coils. I think they were used for radio noise
supression. I don't think that any TR4s were equipped with 6v coils and
ballast resistors; that came about, at least in the U.S., in the early 1970s.
Andy Mace
|