How Deep Will The Sov Go?

Although I know the Sov will do 10" on a dime and I have no doubt that you are telling it exactly the way you see it, two things about your story make me a little dubious. 1. If it's certain that the ground had never been disturbed, then it's highly unlikely that a '67 could have been that deep, especially when it's nearby companions were at 3-4". 2. You say it sounded the same as the others before you dug. It shouldn't have. The pitch should have been the same, but the strength of the signal should have been much lower. There are several phenomena you have to be careful of when extracting a coin from a hole to determine it's exact depth. I've had many a coin's dissapear after breaking the ground. There are two major reasons this happens. The coin, of course, doesn't really dissapear. What happens is, it either sticks to the side of the hole on edge, drastically reducing or eliminating the signal, or it drops deep enough into the hole to be out of range. When it dissapears, remove ALL loose dirt from the hole plus just a tad more at the bottom (if the hole isn't deep enough for this problem, then it's stuck in the side). If that doesn't get it, scrape the sides of the hole all the way around a couple of times to get it off the side. On fainter, repeatable good signals, I generally dig very carefully to keep either of these things from happening. I like to know how deep my machine is going for good coins. My depth test for the Sov was on an island park where the soil was always saturated near the shore. This kept the topsoil like pudding at times, allowing coins to sink faster than normal. I got pulltabs there at 6 and 7 inches. When I finally found the very faint repeatable signal I was looking for, I carefully dug to expose the coin. I wanted to see it's imprint in the undisturbed soil underneath it when I removed it (I've seen this lots of times, but usually in the plug or the edge of the hole). When I got to the '37 Merc, I was up to my elbow in the hole. I didn't have a ruler, but it measures 14-15" from my elbow to the second joint of my fingers. That's where the dime was. At the very least, I KNOW it was over 12". Remember, there was also very good soil moisture on this dig. That's important for good depth, too. For signals that still read good after digging 12 inches and not finding it, WIDEN THE HOLE. There are several phenomena that can cause you to be off center enough to miss the target. False signals: In my experience, the Sov will give false good signals coming off the edge of certain types of junk. It will also give a very repeatable false signal BETWEEN two pieces of junk. These have to be judged in all metal. If the good signal comes right after and on the edge of a nulled out piece of junk, it's probably a false signal. Pay attention to whether it's a broken signal. If it is and it won't hit when swinging from the opposite direction, that is, across the 'good' signal first then the junk, it's almost certainly a false signal. The false good signal between two junk nulls will null in all metal. Certain 'hot rocks' (I assume they are minerals, but I have never dug one out to confirm it) will also ring good on disc. but null on all metal. I find the sov will ring good occasionally on a deep (unfortunately) square nail. I don't dig a LOT of them. I think it has to do with the halo and the nail's size and/or the way it's laying. Most of them don't hit. Maybe a meter would help me on this. Hope you find these experiences helpful. If any of you experienced guys disagree with any of this, let us know why and/or give us any additional observations.