AT PRO Test

[jackintexas]

I do not have an AT PRO yet.There have been several test done with AT Pro recovery from a nail. All that I have seen are above the ground.Because most of the coins we dig are in the ground, I would like some one to bury a dime 3 to 4 inches. Cover the hole with the dirt. Then place the nail above the dime and see how close the dime can be detected from the nail......Jack

 

[Uncle Willy]

Remember when conducting a test such as this, freshly buried coins fall into the realm of "Metallurgical Phenomenon" and are often difficult or impossible to detect.

Bill

 

[Hombre]

Hey Guys

I have a rusty 3 & 1/2 inch square nail and with any detector of my choice for testing, I will find a naturally buried coin and place the nail over the found coin. I have yet to handle a detector that will pick up the coin with the nail directly above the found coin. Now, with a few of my detectors I can place the nail a couple of inches away from the found coin and it will pick up the coin. I'd like to see more tests like the one I described. PS: this test of coarse is with the nail disced out.


Randy

 

[Uncle Willy]

The problem with these types of tests goes back to the electronic nature of the detector. The signal picks up the first target it encounters, stops, and turns a blind eye to anything beneath it. That's why chains are so difficult to detect. The detector does not see the whole chain - just the first link it encounters. Usually the clasp is what is detected and allows you to detect the chain.

Bill

 

[Hombre]

The problem with these types of tests goes back to the electronic nature of the detector. The signal picks up the first target it encounters, stops, and turns a blind eye to anything beneath it. That's why chains are so difficult to detect. The detector does not see the whole chain - just the first link it encounters. Usually the clasp is what is detected and allows you to detect the chain.

Bill

Exactly Bill, could'nt agree more, but with a nail you carry in your pocket and try on a naturally buried target, the test is going to be the same for each detector. no slight of hand carnival trick. Just use your detector of choice, find a naturally buried coin with it and place the nail close to the detected target, and see how close you can place the nail to the suspect coin in the ground. Believe me when I say that some of the most expensive FBS detectors fail miserably on this test, nulling with the nail six inches away from the target, and with an older model Tesoro it will pick up the detected target with the nail only a few inches away. BTW a cheap Compadre will detect the smallest gold chains and without a big clasp.

 

[SteveP(NH)]

One of the targets in my test garden is a 1945 Mercury Dime buried at 6 inches deep. There is also a nail buried 2 inches south of the dime and 2 inches above it, so the dime is at 6 inches and the nail is at 4 inches and 2 inches offset from the dime. The nail is a dug nail.

The AT PRO was in pro audio mode, in the custom discrimination setting with the iron discrimination set at 25 with iron audio turned on and nothing was notched out (notches who needs em).

I first tried coming in at a angle so the coil hit the nail and the dime at about the same time and the machine played a double iron grunt. You could definitely tell there was two targets buried in the hole but it just played the iron audio and the ID meter was all jumpy. When I changed the sweep angle so that it went over the nail and then the dime in a straight line then the first beep was an iron beep and the second one was a middle tone. When I swung the coil so it went over the dime first it played a high tone and then an iron tone. The ID meter showed a iron target and a higher target though on most swings it only went up into the 70s or so although some swings it went up in the high 80's. I didn't think to try shutting off the iron audio so the nail should be discriminated out as I almost always hunt with zero discrimination and I was just testing for myself and my hunting style.

So to sum up if I was really hunting and I swung the coil so it hit the nail and dime at about the same time and it played a double iron grunt I would have likely ignored the target and kept going. However if I had swung the coil so it hit either the nail or the dime first and then the other then I would have likely dug the target, realizing it was a good target being masked by some iron.

Hope this helps some even though the results you get are likely to be different than mine due to soil differences and different swing speed, etc.

 

[KevinH]

Great post. Nice experiment. testing in the ground always provides real results.

 

[Orion42]

That's why anytime I hear a questionable target, I hit it again from different angles.

John

 

[Uncle Willy]

Agreed and I have a Compadre.

Bill

 

[KevinH]

Also I have run into something very similar to your test with the GTI 2500. Instead of a nail there was a Nickel. The nickel was setting right on top of a Quarter. I could tell through the image that it was a coin sized object but also I received a quarter Bing and a pull tab ping. So i dug it and found the nickel right on top of the quarter. The top icon jumped from nickel to half dollar. So the nickel was masking the quarter somewhat. I could have walked away but decided to cut the plug and see what i found. Granted after I retrieved the coins I ran it over again and found yet more change. Pocket spill. 5 Penny's that were maybe 2 inches away from the plug I dug. I dig everything with the hopes that it is a good target. Sometimes it is and sometimes I get a pull tab. I do not even get nails when I disc iron out with the 2500. AT Pro is very comparable to the 2500. Kevin

 

[John-Edmonton]

I also do that, and sometimes I stomp on the target, breaking the iron halo on the target and the conductivity changes from a grunt to a high tone. One should always experiment with iffy targets....running the coil at different swing speeds at different directions and coil altitudes.

 

[synthnut]

" One should always experiment with iffy targets....running the coil at different swing speeds at different directions and coil altitudes."

Anything that is "IFFY" , is time to circle your target and wave your coil at every concieveable angle to check it .....I've found some of my best targets like this .....The angle you hit your target at plays a VERY important role when hitting certain targets .....


I like hunting with discrimination , and then if I hit an iffy signal , I will go into All Metal ( Zero )mode to double check it to see what is around the target that I think is there .... Jim