Original article by Mirco Salmi – © 2017 Smart Metal Detecting – Published on AMDTT.IT with authorization.
(Editing and translation by Leonardo Ciocca © 2018 AMD Tech Team)
Hello my fellow detectorists! I’m here to talk about two brand new coils made by Bulgarian Detech for Minelab detectors Series SD, GP and GPX, that I will test on my Minelab GPX 4500: the 12.5” DD and the 15” DD “Ultimate”.
Before describing the coils, a short introduction about the machine I’ve used is almost mandatory. The Minelab GPX 4500 is a very sophisticated Pulse Induction metal detector, designed for gold prospecting in heavily mineralized soils. A true concentrate of Australian technology, born from the brilliant mind of physicist Bruce Candy, Minelab’s founder and Chief Designer.