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Is anybody using this discriminating BFO Detector ? I have some nice ideas about additional things you can do with this schematic . I use a cristal oscillator , and can search on three frequencies with one coil . I would say that it works good although you need a little know-how to build this baby . The leds will show you ferrous or non ferous hits . Maybe too simple for most of us but hey .... why not share my findings . Kees
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