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Lucky1

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Yesterday I was putting various objects on the ground and listening to the different tone settings on my X-Terra 305 in AM mode. You know, a washer, quarter, dime, penny etc. Just for fun I grabbed one of those little round refrigerator magnets off the frig door and put it under the detector to. I expected a low ferrous tone but I got....nothing! Why is that?
 
I think it may be the ground balance cancelling it out. I once did the same test and could not get my 705 to respond to an english 20p. I contacted Minelab and that is what they suggested. Normaly it does respond to a 20p
 
Magnets used on refrigerators are typically ferrite magnets. Could possibly be that the ferrous content (of the ferrite material) has metallic properties that are below what the 305 is capable of registering. (I discussed a similar circumstance on pages 77 and 78 of the eBook). Something I'd like you to try....... do the same test using zero discrimination instead of All Metal mode. Properly set your ground phase first. Then let me know if your results are any different than in AM mode. Thanks. HH Randy
 
Thanks Randy,
I did as you suggested and there was no difference in the results. Just dead silence.
 
My "guess" would be that the matierials used in the magnet have ferrous properties that are simply too low to register on the detector. I have one piece of ferrite that I use when testing detectors that has proven to be "too low" to readily detect with anything except the X-TERRA 505 series. My only theory is that the 505 has the notch segment -9, whereas the 305 and 705 stop at -8. Keep in mind that magnets are not true metal, as we typically think of metal being. Magnets such as those used as refrigerator magnets are comprised of materials (such as ferrite powder) and chemically compounded with other non-metallic substances. JMHO HH Randy
 
Thanks again, it just surprised me. I kind of expected a low tone or (-) number. I always thought of them as a magnetic "metal".
 
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