[Spridgets] Coil Question

[WFO Herb]

"CB"; Contact Breaker. Point side of the coil, right?

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On Sun, Nov 5, 2017 at 6:00 PM, Martyn Ridley via Spridgets <
spridgets at autox.team.net> wrote:

> I have gone through a number of coils in the past few years. They may have
> been faulty but........
>
> Reading the Lucas repair manual carefully, I came across this "Test 6.
> Voltage at *"-" *Terminal of Coil............4. A high resistance in
> circuit from the coil to the *CB* on the distributor."
>
> 1. Manual was published in 1995 and is for negative earth cars, my car is
> positive earth.
>
> 2. "CB" is not used on modern coils, they are "-" & "+".  When I connected
> my coil up "CB" = "+".
>
> This is where my question comes in. "CB" that was "+" in 1959 is now shown
> in 1995 as "-". (Logical as the cars are now negative earth)
>
> Does it makes a difference? Were coils designed for positive earth? Am I
> therefore running the coil backwards as I am using a coil designed for
> negative earth?
>
> Cheers,
>
> Martyn
>
>
> PS: Standard Intermotor coils, yes I am aware of the Lucas Sport coil
> problem, and I believe Lucas/Intermotor may have had an issue (Coils were
> replaced over a 5 year period, so I would think I avoided the 'bad batch"
> if such existed).
>
> ------------------------
>
> spridgets at autox.team.net
>
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