Posted by John T on December 30, 2010 at 11:13:51 from (66.244.97.31):
In Reply to: Re: Coil 6v or 12v?? posted by jdemaris on December 30, 2010 at 10:21:53:
NICE SET OF SPECS...... Heres even more info, I LOVE these techy sparky chats lol
When they started using more of a solid state switched voltage "pulse" to what Id call "firing" the coil their (coils) primary resistance values varied according to the peak voltage and pulse width the control units produced. The earlier soild state control units acted similar to a set of points opening and closing, it was just that a transistor turned on and off instead to make then interrupt primary current flow.
I used to use the early Chrysler control modules to convert Mercury Marine Distributors so the control unit switched coil current flow versus those old points as that Chrysler unit was so easy to adapt. Then they had those Capacitive Discharge units and remember the boxes (I still have one) that still used the points as a low current switch to control a solid sate switch for the 4 amps or so of coil current, they acted something like a solid state relay with the points carrying a very small current versus the normal 4 amps.
The values Bob M and I had in mind are more for the older tractors of course, whose to say what the poster has laying around though???
Take care and happy new year, Im gonna be in and out of here some while on the road South
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