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Metal Detectors
Minelab
Minelab GPZ7000 information and questions
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<blockquote data-quote="grubstake" data-source="post: 142454" data-attributes="member: 4012"><p>Two things I noticed in that video:</p><p></p><p><strong>1</strong>. At the instant the signal disappears (the 2:00 mark of the video), there is a small but clear double-blip sound. What's that about?</p><p></p><p><strong>2</strong>. The coil is mostly being pushed backwards and forwards as though it's a mono with equal sensitivity all around the edge. As the Bruce Candy cutaway pic makes clear, the front-to-back centre area of the GPZ coil is empty, with a double-d crossover/loop on either side. Perhaps this coil design only works properly in a side-to-side direction? Who knows how it might react to a small central target, when being pushed and pulled instead of swung. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite9" alt=":eek:" title="Eek! :eek:" loading="lazy" data-shortname=":eek:" /> </p><p><img src="https://www.prospectingaustralia.com/forum/img/member-images/4012/1426759799_gpz_coil_internals.jpeg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="grubstake, post: 142454, member: 4012"] Two things I noticed in that video: [b]1[/b]. At the instant the signal disappears (the 2:00 mark of the video), there is a small but clear double-blip sound. What's that about? [b]2[/b]. The coil is mostly being pushed backwards and forwards as though it's a mono with equal sensitivity all around the edge. As the Bruce Candy cutaway pic makes clear, the front-to-back centre area of the GPZ coil is empty, with a double-d crossover/loop on either side. Perhaps this coil design only works properly in a side-to-side direction? Who knows how it might react to a small central target, when being pushed and pulled instead of swung. :o [img]https://www.prospectingaustralia.com/forum/img/member-images/4012/1426759799_gpz_coil_internals.jpeg[/img] [/QUOTE]
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Metal Detectors
Minelab
Minelab GPZ7000 information and questions
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