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New Detech 80cm Concentric Coil for PI detectors
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<blockquote data-quote="PhaseTech" data-source="post: 511495" data-attributes="member: 3149"><p>You must have missed the part about me saying it was raining hard that day <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /> </p><p></p><p>Yes, signal strength ratings are subjective, so you'll just have to take my word for it until I do further testing. I wasn't set-up to alter target depths in the ground. I did have a sliding tube test set-up a few years ago but someone dug it up!!</p><p></p><p>I don't like raising the coil above the ground as it is not a fixed value. An airtest while not ideal is a fixed value - the coil is ground balanced and placed on the ground - same for every coil. When you raise the coil above the ground, the coils will be seeing various levels of ground signal, I.e. less ground signal at 2" and then A LOT less ground signal at 4", so I've never been a fan of these demos. The better test for this is to keep sweeping the coil on the ground and alter the depth of the target above the coil. Then at least the coil/s are consistently seeing the same amount of mineralisation.....you just have to be disciplined to keep the coil on the ground. </p><p></p><p>I think when I am able to test on a range of different sized gold at different depths, then I'll have a better feel on where it lies in terms of performance, and then where it may come in handy and pull a bit of gold. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite7" alt=":p" title="Stick Out Tongue :p" loading="lazy" data-shortname=":p" />ickshovel: :goldnugget:</p></blockquote><p></p>
[QUOTE="PhaseTech, post: 511495, member: 3149"] You must have missed the part about me saying it was raining hard that day ;) Yes, signal strength ratings are subjective, so you'll just have to take my word for it until I do further testing. I wasn't set-up to alter target depths in the ground. I did have a sliding tube test set-up a few years ago but someone dug it up!! I don't like raising the coil above the ground as it is not a fixed value. An airtest while not ideal is a fixed value - the coil is ground balanced and placed on the ground - same for every coil. When you raise the coil above the ground, the coils will be seeing various levels of ground signal, I.e. less ground signal at 2" and then A LOT less ground signal at 4", so I've never been a fan of these demos. The better test for this is to keep sweeping the coil on the ground and alter the depth of the target above the coil. Then at least the coil/s are consistently seeing the same amount of mineralisation.....you just have to be disciplined to keep the coil on the ground. I think when I am able to test on a range of different sized gold at different depths, then I'll have a better feel on where it lies in terms of performance, and then where it may come in handy and pull a bit of gold. :pickshovel: :goldnugget: [/QUOTE]
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New Detech 80cm Concentric Coil for PI detectors
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