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Detectorpro PI search Coil Question

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  • Detectorpro PI search Coil Question

    Anyone know the specs of the 8 and 11" search coils?
    As well as the pinouts of the coil connector. There are two female sockets and 1 male pin in the connector.

    I am interested in making my own smaller coil for it as mine came with the 11" coil.

  • #2
    You didn't measure your 11" coil?

    Comment


    • #3
      Originally posted by WM6 View Post
      You didn't measure your 11" coil?
      I quickly used a multi meter to check for conductivity and ohms, as I am off to work.
      two female sockets = 11 ohms
      1 female socket and male pin = 11 ohms
      1 female socket and male pin = fluctuating ohm readings

      figuring one lead is coil start, one lead coil end, one lead shield
      Just have to determine what is what
      I have not the time to check inductance right now

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      • #4
        Took some extra time and measured the pins to come up with these readings.
        Not sure how this coil was designed or exactly what connector pins and sockets do what.

        Coonector set-up
        Socket #1
        Socket #2
        Pin

        Inductance
        Sockets 1 & 2 = 1.9mh
        Socket 1 & pin = 1.9mh
        Socket 1 & pin = fluctuating numbers

        Resistance
        Sockets 1 & 2 = 11 ohms
        Socket 1 & pin = .2 ohm
        Socket 2 & pin = 11.0hms

        Without going inside the ear cup with the elctronics have no idea the connections are soldered to what.
        If anyone has a clue how this coil was made or why the readings are the way they are, I would like to know.

        I have no problems building a standard mono PI coil, kind of stumped with this one.

        Click image for larger version

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        • #5
          1.9mH sounds way too high. I thought this was an Eric Foster design, if so I'd guess the coil is ~300uH.

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