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Real world masking

May 12, 2019 10:18PM
Everyone is familiar with Monte’s nail board test. It was configured after a real-life coin-nail configuration that Monte stumbled upon in a ghost town. While it may be a good comparison test for various detector’s ability to separate a coin (in the same plane) in the presence of nails, I don’t think it represents a real life scenerio.

In my last Nevada ghost town outing, I gridded an area and pulled all the nails out. I found an iron bar 4” deep. This says something to me. Items in ghost towns can be buried in the soil, and not necessarily right on top of the ground. Thinking about it some more, I concluded that many coins may have been dropped when the town was in full swing. They could have sunk some, during rains and being stepped on, or covered up by who knows what. Then when the town was raised and looted, all the nails ended up over the top of previous items.
So, I ran a little test to see how well a detector could separate a coin in Monte’s configuration, and what I think is a more realistic scenerio.

First, Monte’s standard test.
Detectors used: White’s Classic III (8” concentric) and Equinox 800 (6” DD). Target: 1857 Indian Head.
Classic III can detect a coin at position #1, 6 ways. The “2” line is not consistent either swing direction.
Equinox (Park 2) nailed it (so to speak) in all 8 directions – and noticeably at greater depth. No real surprise.

Then, I placed the coin only 1” below the nail board. Voila. Nada, nothing, from either detector in any direction. Lesson learned about real world masking.

This article was written by Tom Dankowski many years ago. One quote:
"What is hard to believe (and priceless education) is the fact that NONE of these targets were detectable in just 2 inches of dirt depth…… on the bed sheet……….. UNTIL the mask was removed. EACH one of these targets were/are detectable to ranges of 11 inches – 12 inches in the air….. or in clean dirt."

[www.dankowskidetectors.com]

So I decided to construct a magnet “broom” that would pull all the trash up to unmask the goodies. I built 2 “sweepers” with VERY powerful neodymium magnets. These are not your ordinary magnets and are not cheap ($50 each) – but hey, if you are willing to spend $200 on a coil, why not something that will allow them to work?

I’ll put these to the test in Nevada. See pics of "sweeps'.
Attachments:
open | download - DSCF0476.JPG (1.06 MB)
Subject Author Views Posted

Real world masking Attachments

glabelle 280 May 12, 2019 10:18PM

A good start

OregonGregg 135 May 13, 2019 10:05PM

Re: A good start

Kickindirt 127 May 13, 2019 11:20PM

Re: A good start

glabelle 120 May 14, 2019 08:16AM

My shirt pocket metal detector ... and that was the lightweight part.

Monte 135 May 14, 2019 11:55AM

Re: Real world masking

zincoln 138 May 13, 2019 08:10PM

Re: Real world masking

glabelle 124 May 13, 2019 08:16PM

Typical ghost town mask Attachments

glabelle 143 May 13, 2019 08:09PM

The Phantom of the ghost town is unmasked. cool smiley

UtahRich 142 May 14, 2019 07:48AM

Re: The Phantom of the ghost town is unmasked. cool smiley

Rdunzl 139 May 14, 2019 09:18AM

rin tin tin

UtahRich 105 May 14, 2019 12:37AM

Re: Real world masking

NWCindy 162 May 13, 2019 07:09PM

Masking . . . the odor.

UtahRich 116 May 14, 2019 12:43AM

Re: Masking . . . the odor.

NWCindy 118 May 14, 2019 07:16PM

Re: Real world masking

D&P-OR 132 May 13, 2019 07:20PM

Re: Real world masking

NWCindy 148 May 13, 2019 08:54PM

Re: Real world masking hope your broom is as strong as the magnets. Some big iron in those old sites. N/T

Kickindirt 129 May 13, 2019 03:14PM

How strong is that Magnet?

UtahRich 127 May 13, 2019 04:37PM

Re: How strong is that Magnet?

Kickindirt 126 May 13, 2019 06:16PM

The Magnets

glabelle 122 May 13, 2019 07:59PM

Re: Real world masking

UtahRich 122 May 13, 2019 03:02PM

There are so many variables, we have to recognize that there is no 'perfect' in "The Real World."

Monte 156 May 13, 2019 02:00PM

Re: Real world masking

Kickindirt 135 May 13, 2019 10:22AM

Re: Real world masking

Elbert 126 May 13, 2019 09:28AM

Re: Real world masking

glabelle 134 May 13, 2019 11:59AM

Will be interesting to watch.

OregonGregg 137 May 13, 2019 06:57AM

Indian Head?

glabelle 132 May 13, 2019 08:11PM

Re: Indian Head?

OregonGregg 130 May 13, 2019 08:59PM



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