Re: [T3] a good old-fashioned mystery problem.

[Jim Adney <jadney@vwtype3.org>]

On 30 Jun 2002, at 23:42, Dave Hall wrote:

> Could it be something to do with back emf being in the opposite direction to the
> applied emf?

I think it's just a myth. The capacitance is there to prevent the voltage at the 
points from rising faster than the points open, so that a spark has no chance 
to jump across. While it is true that the coil and capacitor form a resonant 
circuit, the actual resonant frequency doesn't really matter, and the direction 
that the current flows is the same, at least immediately after the points open, 
regardless of the frequency.

-
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Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
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