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audio probleme ?

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  • audio probleme ?

    Hi,
    i have finished my TGSL version3 , it work good ,rejecting iron and accepting coins ...
    my question : it detect 1eur coin at 32 cm with not a clear audio ,but at 25 cm with clear audio , is that normal ?
    - tx : 14.51 khz / 5.50 mH / 24.1 ohm --after constraining ,chielded, glued = 14.28 khz / 5.72 mH / 24.3 ohm .
    - rx : 13.92 khz / 6.10 mH /25.6 ohm --after constraining ,chielded, glued = 13.54 khz / 6.32 mH / 26 ohm
    - DD coil 255/137.
    can any one point me ? should i get tx 6.00mH/rx 6.50mH befor or after constraining ,chielded, glued my coils ?
    many thanks

  • #2
    i haven't scop , tuned my coils at J1 (tx) , when nulling ( pin 7 lf353 ) can't get under 105mv at AC range
    REGARDS

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