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Gold Coin VDI'S & Dominant Frequency...

A metal detector ID's targets on metal content and mass. Gold and even silver can show up on any of the three frequencies depending on size as well as content.
 
That's good advice DocBars. Pre-1900 military campsites and trails have produced a few good old coins and relics. Best of luck to you and...

Happy Hunting!
Blind Squirrel
 
Howdy 5900_XL-1,

I'm no technician or metallurgist but aside from the factors already noted (size, mass, shape, angle etc), the fact that the gold coins listed, excluding the gold buffalo, are alloyed with 10% copper, I would speculate that the amount of copper in each item is causing the detector to hit on 7.5. The $1 gold due to their small sizes and small amount of copper hit at 22.5. The $20 Gold because of it's large size and copper content hits at 2.5. The $50 Gold buffalo (.9999 pure gold) because of its size and mass hits at 2.5. Not unlike a squashed aluminum beer can that also hits at 2.5. I don't know if any of this is correct - it's just a guess on my part. Best of luck and...

Happy Hunting!
Blind Squirrel
 
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