Any opinions on this one?

[N2Treasure]

I've been at this yard for a few days now. Quite often I get high pitched little "sqeaks" that don't really repeat but maybe every third or forth pass. Just a little "bleep" then nothing. Full sensitivity iron mask mode "creeping along" all of it. I dug a few of these just to see what in tarnations was making that sound but then "poof" it's gone all the way. 8-10 inches down and nothing. I am hearing a null to the side of the chirp on a few of the targets but mostly it takes 3 or 4 tiny passes or coil wiggles before I hear it again. I cant really pinpoint it either so I have to use my best guess on where to dig. I tried turning the sensitivity down thinking that maybe it was up too high and causing falsing but that didn't help. Any ideas on what it is?

Thanks, Duane

 

[Hotcz70]

cause the EXACT same thing you are speaking of...and it drives me nuts
9 out of 10 times I pass on those type of signals anyway...but after a while...like you...I want to see what the freak is down there. I dig a nice plug...then dig some more...then again down further...only to find nothing The only thing I can think of is that it has to be super deep iron...or some kind of mineralization causing it.

 

[Andy Sabisch]

Duane,

You did not mention if you were running in Semi Auto or Manual sensitivity but if you are in Manual at "32" and the ground is mineralized at all, the response you are getting would be expected.

Since you mention you hear a "null" on the side of the chirp, you must be running with some degree of discrimination dialed in - hence the null from the rejection. Mineralization can also cause a null that appears to be the same as a rejected target. If you switch to pinpoint, do you get a repeatable signal in the area of the chirp? If so, what depth reading are you seeing? Since the depth is calibrated for coin sized objects, if you get a reading of say 8" and you are 10" down and still have nothing to show, you can be pretty certain that what you have is not a coin-sized object.

Sometimes a target may have been in the side of the hole and when you started digging, you either kicked it vertical or it fell to the bottom of the hole. Since we all know that FBS detectors are not the best in air tests, you are now trying to hit a target at the bottom of the hole in air or a coin on edge that had been laying flat. If I have a target that was repeatable in the all-metal pinpoint mode and then disappeared, I always scrape a layer of dirt off the side of the hole and then empty everything from the hole . . . . many times I have the target in the loose dirt I have removed.

If you are not getting a reading in pinpoint (assuming you did not switch to pinpoint when you were over the target or one adjacent to it), I have yet to see that type of signal . . . . . an occasional chirp and no signal in pinpoint . . . . . turn into any target worth the time to recover - either a ghost caused by ground conditions or some mangled, rusted trash. To check it, try switching to pinpoint with the coil in the air and then see if you get a signal - if not, keep on walking and hit that seated dime or gold ring you know is waiting for you!

Hope this helps

Andy Sabisch

 

[N2Treasure]

Thanks for the reply Bryce, I think I did locate one culprit on Sunday and it was a purdy rusty nail. I know that rusty iron can make that high pitched bleep. I think I'll only go after the repeatables.....

Have a good Turkey day...Duane

 

[king-ghidorah]

I was writing something about this being like the Phantom Leg Syndrome but in a reverse way in it's concept with the MD meshing mixed inputs from targets in close proximity and then I closed the browser before posting. I have noticed outside of the coil's effective ID range Con & Fe can be deceiving.

Listening to Screaming Radio . Awesome program with well over 50 genres of music and thousands of stations to listen to AND you can record the radio play to MP3 which is legal. MP3's are stored in the specific folder from whatever station you were listening to automatically. Highly recommended.

Listening to Radio Heavy metal Attack, rock on brothers! (lighters flickering in the darkness)

WHat's weird to is that I am going on 47 this Dec. and I am way harder in the music field than people half my age. Go figure. I must be young at heart.

 

[N2Treasure]

Thanks Andy for the reply! I'm heading out of town today for turkey day so I printed your post off and will study it on the plane. I have the EX2 and I am running in semi-auto and usual sensitivity around 25 to 27, I'm also in iron mask with -6 and run in digital. The readings I see when the cirp occurs is usually 7 or 8 in ferr and 28 in Cond. When I use pinpoint mode, I usually don't hear anything exactly on top of the chirp but I do hear it off to one side which makes me suspect rusty iron. I just don't want to make a mistake and miss that million dollar coin! Thanks for your help!

Duane

 

[mattockman]

Duane, I hunt a little diff, and use smartscreen and nothing disc. out, or use a bit of disc. by using the select feature or just use the edit feature to fill my screen with black....then I keep Ironmask wide open with nothing disc.....so when I use any disc. I can just push ironmask twice and hear the whole picture,,,,my guess is you should have opened up iron mask first and you might have heard the tiny rusted nail close by....it sounds like you are hearing the edge of a tiny piece of nail or just a small one....the sweet sound of a rusted nail will be as you are pulling away from it and you eyeball where you think it is and then you go to pinpoint it and it pinpoints off to the side of your original sight....that is a rusted something...usually cut nail....if it stays within the first eyeballed area and pinpoints the same...it could be good....Tiny hot rocks will be a pain also....always check all the rocks coming out of the hole...they could be the culprit.

Thats what it sounds like to me anyways....

 

[Hotcz70]

BOTH of the sites I'm talking about are grounds where big buildings stood at one time. Another fact about both of these sites is that they just buried much of the scraps...then scraped them everywhere. They really didn't haul a lot of it off...so I'm sure these sites I'm speaking of are loaded with chunks of rusty iron...twisted nails...big can slaw...etc...and all at pretty good depths. I honestly remember having problems at both of these sites back in the early 90's with my xlt. I had the exact same thing happen then...digging deep sounding targets only to find a "ghost" hole. In the later 90's I was almost rendered helpless here with my CZ units. With the SE though...I do experience what you are talking about...but the machine is telling me it is obvious falsing of some kind...so I just move on. I've made some of my best finds at these two sites too...just carefully weeding and creeping through... discerning through the faint falses until I get a signal that sounds better than a "falser"...and that repeats somewhat. Now those babies I'll investigate...and hopefully dig.

 

[digitrich]

If it happens just when you complete your swing to the left and are starting back to your right (middle of changing direction) the detector just saw the same soil twice, and takes a moment to adjust. If you are running your sensitivity real hot or gain high, that will happen, it's pretty easy to ignore but if not, turn them down some. Same thing happens allot on the beach.