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10626Re: DIY Ferrite loop winding machine

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  • compu_friend
    Jun 20 12:01 PM
      Hi Dave,

      These were special for one purpose only narrow band antennas.  L=1114.6 H and 1148.8 H for the two of them.
      It took about 260 NF capacitance to bring them on frequency at 7.8 Hz..  Each trimmed individually.  The self resonance is very low I think in the 100-200 Hz area.  These are in use at less than 1 Hz bandwidth for detection.  

      Gerry
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