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Re: Placement of Ballast Resistor
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Posted by Thomas Donahy on January 15, 2006 at 11:40:26 from (64.149.37.47):
In Reply to: Re: Placement of Ballast Resistor posted by KEB on January 15, 2006 at 08:45:16:
Dear electrical wizards, Thank you for your responses, but I am still confused. The question is more than academic as I am presenting a workshop on point type ignition at the Gathering of the Green conference in March.
Perhaps I can be more specific in my questions.
1. How does the secondary circuit return to the coil? Does it arc through condensor while the plug is firing? The voltage in the secondary is certainly dc as the spark line or I should say firing line is relatively flat on the scope and doesn't start to oscillate and become ac until the coil can no longer jump the plug gap. The circuit can't be completed through the points as they are open when the plug is firing. Does the secondary complete its path from the block, through the ground wire, through the battery,the key switch, and back to the junction inside the coil? Either way I don't see how the placement of an additional two ohms could possibly affect the secondary when you are dealing with up to 20,000 volts.
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