Under Ground Nail Board Test

[Ronk]

Has anyone actually buried the nail board Under ground and filled it in and did the tests? I'm curious how much different the results would be compared to out of the ground.

Ronk

 

[OregonGregg]

I don't think you need to bury the nail board test. Its just a tool. To give you an idea how a machine might handle a iron infested site such as ghost towns , homesteads etc. If my goal is to hunt such sites then I want a machine that can hit that penny at least 6 outta 8 times. If it can do that then I feel confident it will perform fairly well out in those types of sites.

Also is a good tool to show people why they should not solely rely on VDI numbers. A machine might get a nice beep or tone on the coin, but rarely shows the proper vdi number for that target.

 

[Tom_in_CA]

I agree with you that it's not necessary to be buried. But I understand the concept of the question. Because: it's a known fact that items buried for length-of-time do give off different characteristics than air tests. However, in this case, the freshly buried objects would not mimic objects buried for long lengths-of-time. The soil pack is disturbed, and the iron has not had time to leach into the ground, etc... All very subtle, but still...... the differences are there.

Thus putting them on top of the ground, versus buried, will not give much difference for the purpose.

And if the OP is speaking of the nail-board test that's commonly being circulated: Then interestingly , that pattern was a pattern seen ON TOP of the ground anyhow. Monte got a scratchy signal at a desert dry ghost-town environment. But before he stopped to dig, he could see the outline or rim of the coin. He could also see the trajectory of surrounding nails, also on top, lying in the hardpan dry soil, surrounding it. So before he disturbed anything, he called over his hunting buddies, and they had fun comparing which machine could "hear it", versus those who were masking.

Hence before retrieving the coin, Monte had made a template of the exact angles and sizes of the nails, and the placement of the coin. Hence the "nail board test" was born. And it's interesting to note that the objects were on top, not buried . Halos in ground perhaps, yet on the top none the less.

 

[OregonGregg]

Yep was 1994 when the Nail Board Test was born, can read about here. http://www.ahrps.org/_tipsAndTechniques/Nail_Board_Performance_Test.pdf