Re: Placement of Ballast Resistor

Posted by john in la on January 15, 2006 at 09:18:53 from (69.140.200.42):

In Reply to: Placement of Ballast Resistor posted by Thomas Donahy on January 15, 2006 at 07:27:04:

While I am not an electrical engineer and can probably learn a thing or two from them I will give it to you in layman terms the way it was explained to me years ago in mechanic school.

(12v system)
Power is provided to the coil windings. A resistor is put before the coil and the coil is made to work on this reduced voltage (6 to 8 volts) so we can bypass the resistor during start up for a hotter spark.
If we put the resistor after the coil some will argue that the same amount of power is running through the coil but this does not allow us the opportunity to bypass it during start up.
The power then runs to the points which provide a ground when closed. When the points open this sudden loss of power running through the coil makes the electrical field collapse causing the coil to fire.
The condenser is in the system to provide a false ground for a split second so power will not jump the half open points causing them to pit prematurely.

Replies:

• Re: Placement of Ballast Resistor RodInNS 19:00:03 01/16/06 (0)

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