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Dualfield / dual coil

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  • Dualfield / dual coil

    I got for gwe hours coil from Polish PI detector - SMETAK HS-3 and i check this out.
    That coil has small coil inside and bigger outside like dualfield coil but in the plug there was 5 pins. With ihm meter i chesk one has 5ohm and the second 65 ohm resistance. The fifth pin i think is for gnd shield on the cable.
    I think 5 ohm coil is the TX and 65 ohm coils - RX and my question is which is small one and which is big one. Small is located in center of the bigest one.
    Unfortunetly i did'nt check inductance of them.
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