derek evans wrote:
>
>
> the point of all this is that the coil doesn't care which way the current
>flows through it, only that the points interupt the current and that there is
>a healthy capacitor ( condenser) with which to resonate.
> changing the coil connections radically alters the circuit. it will still run
>but with less spark. the fact that some coils are marked with '+' and '-'
>terminals is misleading the + connection always goes to the ignition switch (
>or 'hot wire') and the - minus always goes to the points regardles of battery
>polarity.
> happy negative earthing.
To clarify the above, the coil requires high potential at the +
terminal, and ground at the - terminal. What does change in a conversion
to negative ground is the polarity of incoming current at the +
terminal, as does the polarity of ground. As well, if the coil leads are
reversed (power from switch to -, ground to +, the engine will fire, but
the arc at the plug will travel from the ground lead to the electrode
tip--not the way it was intended.
Cheers, and thanks, Derek.
--
My other Triumph doesn't run, either....
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