I'm going out on a limb here, but I'll bet all or nearly all of the forum members would do just fine with more time in the field using the detectors they already have, myself included. Happy digging.
luvsdux
1637 the secret is to ground balance the MXT properly and the noise will go away. if hunting in coin mode put grn bal switch in ground and then grn bal it . then put it in lock ,set disc on nickels or above or below where ever u want it, then turn the sensitivity knob all the way up and the threshold knob all the way down. use it like that a few times and it should run a little quiet. the whole SECRET to that detector is grn bal it properly I ground bal mine over some hot rocks or coal klinkers and adjust it as I said, the hotter the ground you balance it over the better the detector will see thru iron and find coins in the nails I promise. I have some black sand out of an Arizona silver mine and its so hot that the detector overloads so I hold the head up just so it doesn't overload (in ground)and then throw the grn bal in lock leave it in lock and set the rest where u want and it, it will see thru the nails and iron and see the coins like the nails aren't even their, but if u don't get the grn bal right this WON"T work
What kind of noise is the detector making?? Could be a number of things going on. First rule out the obvious: make sure there are no underground pet fences in the immediate area. Remove your coil cover and clean. Batteries good? Discrimination turned down too low?? The xlt is a great detector. Once you've ruled out the obvious, throw some random coins on an area where there's no metal buried. See if you get a good strong signal with sharp edges.