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Emi And Metal Detecting


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Much is said about EMI sometimes disrupting smooth operation of our Metal detectors, wondering if adding a ferrite ring core to each cable would help. I see the correct size (9mm) on Amazon for about $1 apiece. 

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As I recall the QED was sold with a couple of those ferrite cores to attach to the coil cable next to where it connected into its control box.

Maybe phrunt when he owned a QED had found if the ferrite core made any difference when attached to the coil cable?

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Tried it on various detectors, did nothing.

The QED added them on to prevent the detector EMI going outwards, not the EMI coming in, a shortcut to doing it properly.  Detectors like the GPZ have them internally at the coil cable entry point.

The GPZ

ferrite.jpg.77c1813841ab477c4ca25f914aed4317.jpg

From the QED manual.

QEDManual.jpg.c9a94f7ae87d9485406728d02124fde3.jpg

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