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How to make a Metal Detector - home made metal detector for rock quarry

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An induction balance (IB) metal locator has a good depth of penetration and distinguishes well between ferrous and non-ferrous metals. It is also capable, to a large extent, of rejecting iron and also tin foil This is a boon for anyone who is searching for coins or noble metals. My aim with this design was to create a minimalist device one thatUsing a Calculator and Radio to Detect Metal 1 Tune the radio to highest band on the AM setting. Make sure you are not tuned to a station. You should hear the static tone clearly and steadily. This will allow you to hear any differences in the tone when your device detects a metal object. [1] 2 Assemble the search head. Turn on your calculator.