GOOD signal/NO target ??? long

[Anonymous]

Please help, anyone;
I've been getting what seem to be good signals and after digging humongous holes NO target.
I use a probe and am real careful about sifting through the dirt(mud) after checking the plug.
The smart screen location with these signals falls around the area of new pennies (which I have discriminated out). Not real close but around it.
I have found numerous "new" pennies that were extremely corroded and yesterday I found a THIRD of one. It looked like it had been snipped with sidecutters and then soaked in acid. After cleaning it up a little I was amazed to find the date 1989.
Finally, here's my question...
Am I picking up readings on coins that are no longer coins? IE Has acidity due to fertilizer or whatever TOTALLY eaten them up?
The readings are not nulled out but they are fairly close to the new pennies that I know are corroded and pitted.(when I disc. out something I put a black dot on my screen overlay)
Can anyone tell me what's up here?
Thanks,
Bud

 

[Anonymous]

Let me ask you, do you switch to iron mask when trying to locate the targets after digging? could be after opening the hole your disc pattern is knocking out the target... if it sounded good before digging somethings down there....

 

[Anonymous]

I hunt in iron mask -8, ferrous and fast,listening for tones with a old-coin/gold discrimination pattern drawn on an overlay for reference . When I hear a good tone I switch to the real disc. pattern to see if it nulls with a wiggle.
These disappearing targets don't go away until I break the ground at, pretty much the same level as the depth guage says it is. I sometimes get a read with my probe until I stir the loose stuff in the bottom of the hole.Then it goes away.
The small piece of '89 cent didn't read in the same place as an 89 cent (disced out) should. It read in the same place as the disappearing targets with very little bouncing. That's why I was wondering if I've been reading a halo of what used to be a coin. Does a target (coin) change its mollecular or metallic structure if it's been corroded away by a corrosive in the ground and then read totally different?
I'm confused.
I'm sure I'm digging deep enough and I bell the hole bigtime and use 2 different probes. On this particular target that's making me nuts I end up with a pile of dirt that's got me listening for police sirens.
Thanks for any help.
Bud

 

[Anonymous]

I suppose its possible your picking up iron hat has rusted to a point it has a very big halo, and opening up the ground is breaking it up.. what are you getting in all metal or does your explorer null over the pile after digging? sometimes rustu oron will give a decent signal and goes away immediately after digging. Kind of doubt a wasted zinc penny would do it, at least very commonly. I can almost always tell an iron signal from a good one near iron, and thats how you learn by digging and associating with the sound quality you get on the target.. after a while you will be confident on what your leaving and what your digging.. the explorer to me has been the easiest detector to distinguish those type targets so far... a couple things you can experiment doing on those iffy signals is lowering iron mask and switching to ferrous audio to see if your getting low tones most of the swings over it.. If the target is truely disappearing and you hear nothing in all metal over the hole or with a probe. Im pretty sure its iron, or even possibly a hot rock......Jim