Hello everyone I just recently got the Fisher F70 and I was around power lines so it was chattering so I turned the threshhold to -3 and my sensitivity to 85 in fast mode and my discrimination at 10 and notch at 1 and it seemsed good but not a hole lot of depth. I got the 11" DD coil so what is a good seting when your under power lines?? Also can anyone give me some good setings for finding coins were there's no electrical interference and the ground minerals are low???