AT PRO, a deep hole, and nothing makes since to me.

[iWeld]

Maby someone can help me understand what the machine was telling me.
Went out on an all day hunt on an old 1870's farm. Founds lots of old iron there in the past and was the same for today. So while on the top of an old pond dam I get a solid 80. Pinpoint it and start digging. So i get to about 18" down befor i get a hit with the my little pinpointer and start chasing the beeps. Finally i run into some iron but its in the back side and off center of the original hole about 10". I did not recover the iron, to tired at that point and There was no other targets found with the propointer so....
Do think the atPro was targeting the Iron i found in the back side way outside the coil or is there another target much deeper?
It had me dumbfounded so I took some photes thinking maybe someone could educate me on somthing I'm not getting.

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[smokeythecat]

Some iron will read high. Very old iron can have other metals, like silver in it. They didn't refine too well a long time ago. In situations like these I normally find the target is in the side of the hole. When I dig the hole out another 6" I normally find it.

 

[iWeld]

Thanks, i concidered it but I figured the propointer would detect a target in the side if it was there. Thats how i tunneled in to the iron. Maby I'll hit it again tomarow after i recoup a bit.

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[nsdq]

Some times large flat iron will give a reading of other than iron , happy huntin

 

[digger460]

Agree with Smokey. Not only the iron, but a flattened aluminum can will also ring a solid 80 (AT PRO). What I do is listen to the signal first. If it's pretty loud, you know it's pobably less then 6",(depending on moisture in the ground). If it's a softer 80 but still solid, 6 to 12 inches probably, or could be a coin on it's side at 3". ORRRR it could be a piece of large iron that is 4" to the side of the hole. 18" is a stretch for the AT. My guess is you passed the original target, and chasing something that was under it. Been there, done that! Had a hole a couple of weeks ago. Solid 80. I'm digging and digging and finally came across this. Big iron at 24" and no target's above it.
Don't forget to check the grass around the dirt. Sometime's those coins will roll out of the dirt. Good Luck!!

 

[iWeld]

All good points, appriciate the help! Digging a hole like that and coming out empty handed had me second guessing what I knew I thought I knew.
Inquireing minds and all that...I'll be back there to find out what it was soon.

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[John-Edmonton]

Metal detectors are tuned and calibrated to coin sized objects. Drastically change the size and the VDI numbers change also. You can guesstimate a targets size by swinging the coil laterally over the target and see how much distance it takes before the signal disappears, or keep raising the coil while swinging it and see how high it goes before the audio stops.

 

[Diggin-N-Dumps]

Can you raise the coil a foot in above the hole and get a target? With that being an old farm, it's probably junk buried deep. I spent a couple hours on a target that was about 3 feet deep and it turned out to be a piece of aluminum siding. But I knew it was big when I started. I was hopeful by for an old sign or something

 

[iWeld]

The target pinpointed as a normal, no indication it was a large or elongated like a buried pipe. And i didn't get the signal at the edges of the hole. I don't think i raised the coil to check like Diggin mentioned. I'll remember that for next time. [emoji106]

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[Corben]

Me. Fill the hole and walk away and don't look back.

 

[Greybear]

Most likely what the detector picked up was the large iron target and you may have been getting the 80 VID from falseing off of the edge of the coil. That would explain the missed pinpointing. If you pinpoint using the pinpoint button it should have been on target. If you pinpoint doing the wiggle or the North- South, East - West technique you may have picked up the signal just off the edge of the coil.


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