Spoiler notify: there is no universal ‘ideal metal detector for gold’. (Even though the GPZ 7000 is close for all those of you who can pay for a detector that’s the exact same cost as a vehicle). The two primary coils are linked to an oscillator that generates a radio http://family.bigbrother.bg/forum/topic_show.pl?tid=238945;msg=NewPost;sid=159865ccbd09bc856ac1aca2d1cc7a5a