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Where is Q12 for?

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  • Where is Q12 for?

    What purpose has Q12, can find it on the pdf's.
    But did see it on pictures of HH's, including the one from Carl him self.


    Click image for larger version

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  • #2
    Looks like Q12 and Q13 are a low voltage warning circuit.


    Found this rev D1 schematic linked below

    http://www.geotech1.com/forums/attac...4&d=1381308999

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    • #3
      Thx!
      How could i missed that.

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