I was going to hunt the field at work today that was used to air dry lumber from 1925 -1965,when I turned on the at and gb. when I tried to hunt it was like a large bed of mixed metal vid all over sounds high to low growl lowered sen. no help manual gb no help could not use it. I got the tesoro out it is super quite turned it on it was same way could not hunt with either one.Question is to one of you oldtimers is it me or the soil that bad that a detector will not work the tesoro is auto gb.