Quote:
Originally Posted by BENZINAS
is it possible to built a detector type VLF with search coil which detects only gold , reject all other metals and beeps only to gold , full discrimination shows only gold , can be done ?
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Probably, if you mean 100% clean gold. Such gold do not exist in nature.
All gold you can find in nature (artificial or natural) are always some sort of (very different) alloy and with very different electrical characteristic.
There is no common denominator for existing gold and so no VLF capable to filter out or tune to such different gold alloy.