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Metal Detectors
Detector Accessories
Nexus 30" and 21" Concentric Coils For Minelab GPX
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<blockquote data-quote="Candigger" data-source="post: 496935" data-attributes="member: 14328"><p>I call them concentric, because they are concentric. The TX is outside and the RX is in the centre.</p><p>Concentric coil is not a version of mono in any way, because there are two loops working in concentric and only one in Mono (short of White's developments).</p><p></p><p>In case of PI detectors concentric coils are not affected by mineralization like they appear to be with VLF detectors as PI works quite differently and coil shapes are not a factor of stability there.</p><p></p><p>Given that all parameters are equal DD, concentric and any other overlapping coil designs have the same depth and sensitivity. The differences come in the discrimination with VLF.</p><p></p><p>Concentric on a PI is as deep as mono, because the TX is the same size as mono and it's deeper than DD, because the TX is bigger than on DD.</p></blockquote><p></p>
[QUOTE="Candigger, post: 496935, member: 14328"] I call them concentric, because they are concentric. The TX is outside and the RX is in the centre. Concentric coil is not a version of mono in any way, because there are two loops working in concentric and only one in Mono (short of White's developments). In case of PI detectors concentric coils are not affected by mineralization like they appear to be with VLF detectors as PI works quite differently and coil shapes are not a factor of stability there. Given that all parameters are equal DD, concentric and any other overlapping coil designs have the same depth and sensitivity. The differences come in the discrimination with VLF. Concentric on a PI is as deep as mono, because the TX is the same size as mono and it's deeper than DD, because the TX is bigger than on DD. [/QUOTE]
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Metal Detectors
Detector Accessories
Nexus 30" and 21" Concentric Coils For Minelab GPX
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