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Metal Detectors
General Metal Detector Discussion
Super magnet effect on detectors and coils
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<blockquote data-quote="Hilux" data-source="post: 653562" data-attributes="member: 23052"><p>Nah not Mumetal - I'd forgotten about Mumetal. It used to be used in old school CRT oscilloscopes around the tube. I think it was meant to be very expensive.</p><p></p><p>The back cup part is just soft steel and closes the magnetic loop rather than blocking it as such - thats how I understand it anyway!</p><p></p><p>There's some neat pics here of how the field is constrained;</p><p></p><p>[URL unfurl="true"]https://www.kjmagnetics.com/blog.asp?p=mounting-magnets[/URL]</p><p></p><p>Bugger, now I'm going to spend the rest of the night googling magnet stuff!</p></blockquote><p></p>
[QUOTE="Hilux, post: 653562, member: 23052"] Nah not Mumetal - I'd forgotten about Mumetal. It used to be used in old school CRT oscilloscopes around the tube. I think it was meant to be very expensive. The back cup part is just soft steel and closes the magnetic loop rather than blocking it as such - thats how I understand it anyway! There's some neat pics here of how the field is constrained; [URL unfurl="true"]https://www.kjmagnetics.com/blog.asp?p=mounting-magnets[/URL] Bugger, now I'm going to spend the rest of the night googling magnet stuff! [/QUOTE]
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Metal Detectors
General Metal Detector Discussion
Super magnet effect on detectors and coils
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