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Here's good info. on ballast rersistor

Discussion in 'Early CJ5 and CJ6 Tech' started by Dave B, Mar 15, 2015.

  1. Mar 15, 2015
    Dave B

    Dave B Frankenjeep '67

    Northern Minnesota
    Joined:
    Nov 10, 2009
    Messages:
    652
    In a complete re-wiring of a 1967 CJ5 with ballast resistor the four-part video presentation "Ballasted Ignition System" has allowed a better understanding. Trust it might be helpful to others. Clicking on the link and and if necessary select "open in a new window" should get you to Part 1 and Part 2-4 will be there as well.

    https://www.youtube.com/watch?v=ec7gSyVrh4g
     
    Last edited: Mar 17, 2015
    Dave B, Mar 15, 2015
    #1
  2. Mar 15, 2015
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
    Joined:
    Nov 27, 2006
    Messages:
    2,793
    Sorry. Link doesn't lead anywhere. At least not for me.
     
    1960willyscj5, Mar 15, 2015
    #2
  3. Mar 15, 2015
    Dave B

    Dave B Frankenjeep '67

    Northern Minnesota
    Joined:
    Nov 10, 2009
    Messages:
    652
    Dave B, Mar 15, 2015
    #3
  4. Mar 15, 2015
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
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    Nov 22, 2003
    Messages:
    8,126
    Good clear explanation on many points however I'd quibble with a few of his statements.

    There are indeed "real" 6 volt coils, because 6 volt systems pre-date 12 volt systems.

    Also his math works out for steady state DC circuits, but with an ignition system the average power used will be well less than he's saying, first the current is only running part of the time (dependent on your dwell angle) & the coil isn't a purely resistive load- it's inductive which means the current pulse when the points close will see an apparent resistance much higher than what you see with an ohm meter.

    Still pretty good though.

    H.
    H.
     
    Howard Eisenhauer, Mar 15, 2015
    #4
  5. Mar 17, 2015
    Dave B

    Dave B Frankenjeep '67

    Northern Minnesota
    Joined:
    Nov 10, 2009
    Messages:
    652
    Howard, thanks for the comments! I'm not very technical and was only able to follow the basics, which allowed some understanding of a Ballasted Ignition System.
     
    Last edited: Mar 17, 2015
    Dave B, Mar 17, 2015
    #5
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