Spoiler alert: there is not any common ‘most effective metal detector for gold’. (Even though the GPZ 7000 is near for people of you who can afford to pay for a detector that’s the identical selling price as a car). The two key coils are connected to an oscillator that http://sarmacikrolewscy.phorum.pl/viewtopic.php?p=24914&sid=daf98ca1ad906080a339ad58831baacb#24914