It depends on the depth of the copper, the size and the oxidation on it. It actually can have the numbers of an iron signal all the way up to 94. It's why I dig everything when I am out in the woods where a lot of people haven't been playing around.
@@chriskathy9865 I definitely appreciate the response. I was testing the 540 with a piece of native copper in quartz host and was getting low iron numbers anywhere from -2 to 3-4 with the iron exclusion off as well as a random 14.
@@bigcmcg3946 Yeah, like I said it can be all over the place. Some people seem to think they know what's in the ground by the numbers and sound a machine will make, but I have learned to just dig everything, a iron signal might be a nail, but it could also be a lighting bolt all too. Thanks for watching.
