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went out for a field test had much better luck ( no gold found ) it seemed to get a nice constant hum but we had a problem we were picking up what seemed to be real dense rock maybe with high concentrate of iron or minerals in it is there a way to tune these rocks out?

ok thanks for the help everyone i guess ill just have to do more field testing, i think it will be to do with ground balancing due to doing in my back yard

i just bought a minelab gpz7000 yesterday and we ran the quick start, ran it over a little plastic container filled with 0.4 of a gram of match stick head size pieces of gold and didnt hear and change in the pitch of the hum. we have tried fiddling with the settings but can only manage to get...

hi i live in mount morgan and just bought the gpz 700, after a forum that will help with troubleshooting etc