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I have notice after winding, concentric an basket weave coils, they all detect copper material much better than other materials, coins large an small. I was of the thinking that copper is a very good conductor, or am I not correct. Best to all Jim
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Jim, you have to distinguish:
1. Ohm/Galvanic conductivity
2. Eddy/Foucault current conductivity
what do you mean?
Illustration of Galvani's twitching frog leg, when touching it with an arc made of zinc and copper.
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I am testing the coils in free space, as I move a coin, copper ,silver, and gold over the various coils. I have noticed that the greater distance from the coil to activate the detector is a copper type object. I really don't check iron or steel targets, because I am trying to figure out how to make a coil with a ohmic resistance of about .5 ohm, about 300 or so micro henrys and a very high "Q". I probably will never get out in the field with detector, but I enjoy the learning process. Best to all JimComment
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