Just got a Tesoro Silver µMax and when I set the discrimination to max, dimes and copper pennies are discriminated out. Only quarters and higher are heard. If I want to hear dimes and coppers, I have to set the disc right above zinc. Is this normal for the Silver µMax? I've owned a lot of Tesoros and this is the first one where this has happened. On all of the other Tesoros I've owned if I set the discrimination to max, all coins higher than zinc could be heard. This is not a problem for me, but was just curious. Thanks
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