I've seen it over and over and over again. Do NOT swing the loop 6" or more off the ground. I was at the beach yesterday and got some nice coins including an 18th century coin. There were other people out, they said they didn't find much. I was watching them and they were swinging their coils were a good 6" off the ground. It doesn't matter how deep the machine will go or how well the discriminator works if you give away 6" all the time. It ain't the machine, it's the operator!
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