Poncho;
I believe you said you got a Whites Classic II right? If so, may I give you some pointers? The sound is most important, hard to explain, but here goes. I swing my detector just off the ground like I was mowing the grass with a weed eater. Do not raise coil off ground at end of swing, keep coil flat to ground during entire swing back and forth. THe classic II is a motion detector, the coil has to be in motion for it to detect a target. When you squeeze the toggle switch that puts it in all metal mode for pinpointing and in non-motion mode so you can x out the target with side to side and back and forth motion to pinpoint.
Now to the sound part. A smooth beeep one direction of the swing, and a smooth beep in opposite direction of swing, indicates a good target, a broken bee-eep, beep in both directions indicate a junk target, usually a pull-tab or old rusty bottle cap. If you have discrimination knob set on coins preset mark, ans sensitivety set at preset mark, it should filter out all but a large metal target such as popcan, sewer pipe lid, or some such piece of metal too large for filter to cancel, but these are easy to determine as the signal covers a larger area than a coin does. Look for small targets, listen to the sound, smooth beep, good, broken be-ep, bad. HH. Scotty