Vintage Metal Detector Forum
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Re: First metered ID? - reply x2
I just read your memoirs. And I would have to say that the Compass you're referring to would not accurately be called "TID" (target ID). The needle banged left for objects that fell below wherever you set your disc. knob to. And banged right for items that you had elected to accept. So in that sense, it was more like an intensity meter. It was not telling you nickel vs tab vs penny vs quarter, etc....