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TOPIC: Basic metal detecting info

Basic metal detecting info 02 Jul 2014 10:50 #1341

  • dwunder
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Question:

When a metal detector gives a signal, is it detecting it from anywhere in particular on the coil or the coil as a whole? What I mean is, to center a target I have been inching up and down on a target signal to find where the signal stops reporting. When it stops reporting, I am assuming that is because the target is outside of the outer coil loop. Is that right? When you get a tone, is it because the target is towards the center of the coil or could it be anywhere under the whole coil?
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Basic metal detecting info 02 Jul 2014 14:28 #1342

  • Coin Magnet
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You could try an "air" test and tell. Lay your detector on a table away from metal then tape a quarter on a wood paint stir stick and wave it in front of your coil. Start out about 12 inches away and wave it back and forth, moving it in until eventually you get to the coil. I think that will answer your question.
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Basic metal detecting info 02 Jul 2014 14:31 #1343

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Good plan. Thanks
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Basic metal detecting info 08 Jul 2014 12:39 #1350

  • Rottonr
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My understanding is that the coil detects a cone shape area going down, the farther away from the coil the smaller the detecting area. Thast is why for the deep goodies you have to overlap big time to get good coverage DEEP.
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Basic metal detecting info 08 Jul 2014 12:48 #1351

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Good to know. That would also explain why most "deep seeking" coils that I have seen are usually larger diameter. Thanks guys :)
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