Well guys, I'm not upset at anyone. At 64 years we men don't get that way that easily. We learn that a blade of grass bends with the wind so that it won't break. We also learn that many people are blindsided by their opinions, instead of facts. I don't have any opinions. When we reach a certain age we begin to mature, usually not until we learn to be modest and humble. Our opinions become less pronounced and less important, even useless in reality, and until we someday realize that our opinions mean less than squat. I learn from the biggest of fools and the meagerest and greatest of mind and heart. I draw no lines of distinction, but I do not ever post my opinions on here, or anywhere else for that matter. My world is one of primarily thought first, experience second, and thought third. I know fully well when something seems to "be too good to be true". I am not easily deceived or made a fool of. It is not in my nature, nor is it a weakness of any part of my mind.
The truth is, that a metal detector cannot detect past it's air depth capacity because it is by all virtues impossible for it to do so. There is no magic wand to change that either. The world of truth regarding metal detectors is never a pat science, but it is one of reality and ever changing search conditions. One thing we all need to know is that our metal detectors create a field that is not ideally symetrical, and is also one of limitations. Some patterns of search fields look a bit like a potato with cancer growning here and there on it, sort of lumpy and bumpy. However, the only area that has enough intensity to disturb it's normality is that which is enough to invoke a change at the secondary or receiving coil. And that is why we are not able to find coin-sized objects past a given point equal to that field which we discover in an air test. What this means is that although a detector search field can be as emense as a 5 foot sphere, it does not recognize coin sized objects past it's in-air depth. And yes, an average vlf metal detector creates a sort of an egg-shaped pattern about 5-6 feet in diameter at the ends of each pole, but most of it is useless for hunting coins. If you doubt this, then maybe you should ask yourself why we can find a garbage can lid with a meager Ace 150 at 3 feet, yet a coin no deeper than 8 inches, even in air.
ALL metal detector engineers listed above are fully aware of the limitations of their inventions, AND that oftentimes people are deceived into believing that their detector finds things deeper in the ground than in the air. Most of the time they just blow it off realizing that young men have "visions" and that a few old goats dream dreams. ALL of us also know that unless a copper or brass or lead object has been in the ground for decades and decades there is no "halo effect" at all. Unless of course someone poured lie, acid, etc. all over the ground at some time. They also know that iron or steel can create a halo effect in less than 10 years, easily, depending on the soil type because the atoms of iron are very loosely covalently bonded and they "give them up" very easily. . They also know that silver takes several hundred years to produce a halo effect and that it takes gold as much as thousands of years to even produce a vapor of a halo effect, something that our current measuring devices are unable to measure at all, save for atomically weighing them (down to atom size).
My mission here is to teach, to learn if I can, but mostly to take out the trash now and then. If I don't do it then someone else has to. But oftentimes, it just keeps building up until it starts to stink clear to high Heaven.
And yes BuckleBoy, I think you and I have the same KING, so do others but they often aren't aware of it.
Easy$$$
Some people are just too dense to accept the facts as they stand. You really gotta love the people who'll stand there in front of the monster as it bears down upon them and they just keep stating there's no such thing as monsters. 
