Teknetics Delta 4000: recovery speed test and rewire

Do you consider a concentric coil capable to distinguish between targets? Or is it DD coils’ exclusive ability? Well, it’s an interesting question. See the test of the unit’s ability to separate close together targets: the Teknetics Delta 4000 metal detector with a standard Teknetics 8 coil (8COIL-7TEK, Concentric).

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