geologists, treasure hunters, and public utilities to find large, deep objects, ore veins, pipes, and cables. It is the best of its class for depth, range, and ease of use, and has a patent from 1938. Features include V.C.O audio response, inductive and conductive trace modes, 60-cycle noise reduction, power switches, battery meters, and weighs 7.5 lbs. (3.4 kg) using 16 AA batteries, split between the transmitter and receiver.
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