Part 1 of 3: Steve Gholson talks about "VLF" vs "PI" metal detectors, and how they find gold. Video from the September, 2010 Grand Opening of the Minelab Technology & Training Center in Dewey, Arizona.
Gholson Part 2 of 3: http://www.youtube.com/watch?v=pO5dGwORZoI
Gholson Part 3 of 3: http://www.youtube.com/watch?v=4o_D7-Acnps
