> So, I disconnected the excitation resistor. The car now switches
> off without
> incident, and no voltage at the coil. I've got to conclude from
> this that the
> alternator excite circuit inside the alternator is providing
> sufficient current
> to keep the coil operational but little else.
What ignition are you using, John ? This is a known problem with some
electronic ignitions, the cure is to add a diode in series with the
resistor. Also, 5 ohms seems a bit low ... if you don't want to add the
diode, you could probably try 10 ohms instead.
> Here's a $64 question - why did the rpm's increase as the coil voltage
> decrease?
Beats me.
Randall
Check out the new British Cars Forum:
http://www.team.net/the-local/tiki-view_forum.php?forumId=8
|