Bounty Hunter TK4-PL Tracker IV Metal Detector

Bounty Hunter TK4-PL Tracker IV Metal Detector Bounty Hunter Tracker IV Gold Digger Metal Detector TK4 Metal Detectors, Brand Bounty Hunter, Color Black, The Tracker IV metal detector detects all types of metal while the progressive discrimination control eliminates iron and other unwanted items5-year limited warrantyOperates on two 9-volt alkaline batteries (not included)8-inch search coil allows greater depth detection and easier pinpointingLightweight and ergonomic design provides comfort for hours of productive detecting
I have had little experience with metal detectors, except for having built one once about 40 years ago as a project I found in an electronics magazine. I still understand in principle how these devices work from that experience and from a general background in electronics. Basically a balanced circuit is produced in the two coils at the end of the unit. When the flux lines in the coils are changed by induced e...