Originally posted by Elliot
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For sale - bare circuit boards for the new Gold-Max Pi V1.1 Super fast 6uS sampling!
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Corrected the graph wording (Actual foil thickness is 0.02mm, not 0.2mm as stated at post #13). For those that may be unaware, it is much more difficult to detect thinner targets than thicker targets, and much more difficult to detect small unpure gold pickers than pure gold, as these targets have a faster signal decay time (i.e. shorter/lower time constant [TC]). As this machine can first sample at 6uS (with a good coil), then it can potentially detect targets with a TC as low as 1.5uS (i.e. 4 x TC's (6/4 = 1.5). At 5 x TC's the target signal is effectively gone), which is borne out by Greens comment at post #15, where he states that a 1 inch square of 0.02mm aluminium foil has a TC of about 1.8uS, and the test result shows that this set-up can detect a one-layer 1" square at an extremely good 28cm (11")!.
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To better understand just how good the Gold-Max detection capabilities are, it has been compared with one of C-Scope's previous flagship models - the Newforce R1 (refer to the video link below). There is a depth detection comparison graph at the end of the video. Pay particular attention to the difference in performance when detecting all types of targets, but particularly a variety of gold targets. https://youtu.be/qozr5b1fM88
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Just a courtesy notification that I have two pcb's left from the current batch. Email me ([email protected]) if you'd like a construction manual to mull over before committing to buy one.
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