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Whites Tdi Pro Standard vs Whites Tdi Pro Modified.
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<blockquote data-quote="karelian65" data-source="post: 534312" data-attributes="member: 9224"><p>Did a quick air test on the machines using the Coiltek Tdi 6 inch mono coil. The ground balance was off, conductivity in all, pulse at 10, gain on each machine as high as possible until unstable. The stock machine managed 6 on gain whilst the modified machine got to eight.</p><p>On the one grain gold ingot the modified machine only won by 5mm or half a centimetre. Using a quartz infused and partially porous gold specimen of 0.29g the standard machine detected it at 4cm whilst the modified detector managed 5 cm. A marginal but significant advantage.</p><p></p><p>The ability to advance the gain a bit further, the smoother threshold which makes picking up whispers easier and a small increase in sensitivity mean the modified machine has an advantage here. On smaller targets at shallow depths the advantage is larger but as target size and depth increase the advantages decrease. More tests to follow.<img src="https://www.prospectingaustralia.com/forum/img/member-images/9224/1580002381_img_1752_edited.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="https://www.prospectingaustralia.com/forum/img/member-images/9224/1580002396_img_1754_edited.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="karelian65, post: 534312, member: 9224"] Did a quick air test on the machines using the Coiltek Tdi 6 inch mono coil. The ground balance was off, conductivity in all, pulse at 10, gain on each machine as high as possible until unstable. The stock machine managed 6 on gain whilst the modified machine got to eight. On the one grain gold ingot the modified machine only won by 5mm or half a centimetre. Using a quartz infused and partially porous gold specimen of 0.29g the standard machine detected it at 4cm whilst the modified detector managed 5 cm. A marginal but significant advantage. The ability to advance the gain a bit further, the smoother threshold which makes picking up whispers easier and a small increase in sensitivity mean the modified machine has an advantage here. On smaller targets at shallow depths the advantage is larger but as target size and depth increase the advantages decrease. More tests to follow.[img]https://www.prospectingaustralia.com/forum/img/member-images/9224/1580002381_img_1752_edited.jpg[/img][img]https://www.prospectingaustralia.com/forum/img/member-images/9224/1580002396_img_1754_edited.jpg[/img] [/QUOTE]
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Metal Detectors
Whites
Whites Tdi Pro Standard vs Whites Tdi Pro Modified.
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