This metal detector was found in a 2001 Poptronics, but it can still be easily assembled, as the components used are common. The handset must be high impedance magnetic and the explorer coil is formed by 10 turns of wire 28 in a form of plastic or wood from 20 to 25 cm in diameter. L2 is formed by 80 turns of wire 22 in a form of about 2.5 with a diameter.
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