now that i have a really good understanding of how this detector works i find myself wondering sometimes if i mixed iron signal with just a hint of a high tone is worth digging, i would dig everything if i had the time but thats not happening, what are the best ways to really get the explorer to be more accurate on its readings? a lot of times at these old colonial sites i go to i will get a little bit of a high tone that varies more on the side of iron but at the same time its isolated and not in very trashy areas so i dig a little and the sound really goes to iron, but yet a few times i found a coin when i would have normally have passed it by.i have a sun ray probe that doesn't have the depth of a coil but seems like it s very accurate and when that clears up the signal its problem a coin. i have tried smaller coils but it just doesn't seem to help me.