"This myth is Busted"

[ivconic]

Funny trivia, maybe random coincidence; but ancient Romans frequently used Arsenic.

[ivconic]

I see. Very interesting article. I have tested my TGSL in my garden with freshly buried targets and I was dissapointed on the results but no everything is clear and those test look funny!

Trust me on this, i made more than 50 TGS's diys so far. Maybe more, i haven't really counted.
I also worked with few of those for several months overall.
On my local sites.
TGSL will surprise you very positively on some real sites and of course it may disappoint you on some others.
The very same story as with any other existing brand or model.
TGSL is very good for silver targets too.
I sold dozen of those TGSL's to people in northern Serbia (Hungarian origins) and i got very positive feedbacks from them.
They reported me TGSL's excellent behavior on those small and smallest silver coins from Arpad Dynasty period.
Especially on plowed fields with a lot of trash around.
So i can only suggest to you; go out with it and do search!

[Nandor]

I see. Very interesting article. I have tested my TGSL in my garden with freshly buried targets and I was dissapointed on the results but no everything is clear and those test look funny!

[ivconic]

Hi
Here were I live there are several sites that would be good to detect with my TGSL but it's illegal :P
ivconic do you hunt daytime?

Yes of course. On distant sites, far away from urban areas.
It is "semi illegal" here too.
I don't go to sites where i can be easily spotted by authorities.
I hide!

[ivconic]

There is also one important point to emphasize here.
"Hallo" effect can also be diverse, due to factors so nicely analyzed at the same article: http://www.njminerals.org/metaldetec...aloeffect.html
And that's why various detectors will not always respond the same in such situations.
Some models will take all the advantages of that phenomena and some won't.
Simply because of the differences in signal processing and filters presented at those models.
steaua581's example on X-Terra at Russian sites perfectly indicates this.
Now... let's ask ourselves one simple question;
would it be truthful and fair to take such X-Terra model and compare it with another model from another brand; on artificially prepared testing bed with freshly buried targets?
Would such results be relevant? To whom?

[Nandor]

Hi
Here were I live there are several sites that would be good to detect with my TGSL but it's illegal :P
ivconic do you hunt daytime?

[ivconic]

"Brigada tavarisii" i start to become nostalgic lol.

Another example of x-terra finds https://www.youtube.com/watch?v=Nhch81AbYF0
The Russian key word to search for on youtube is "клад" . Boy so many treasures found... i like watching those videos over and over Gets the blood pumping lol

Smallest silver coins!
My most favorite targets!
Deus simply likes them!

[ivconic]

Since this is probably the closest analyze that i have seen so far; i preserved it in form of text to have it as copy on my disk.
In case that page disappears from the Internet in time.

[steaua581]

"Brigada tavarisii" i start to become nostalgic lol.

Another example of x-terra finds https://www.youtube.com/watch?v=Nhch81AbYF0
The Russian key word to search for on youtube is "клад" . Boy so many treasures found... i like watching those videos over and over Gets the blood pumping lol

[ivconic]

"...VII. Summary of the Halo Effect

The halo effect is real, not just on iron. It can happen by (A.) classical chemical mechanisms, (B.) biological-biochemical mechanisms, or (C.) both.

Once a halo forms, it would be expected to work in one or more of the following ways:

1.) By increasing the size of the conductive area centered on the metal object. Only a small amount of dampness is expected to be necessary for this, but more has a greater effect. When the entire ground becomes conductive (as on a wet salt beach), notice how a typical VLF detector reacts.

2.) By generating an electric field due to a potential difference. This does not require moving current. Regions of potential difference (i.e., voltage) are expected wherever a metal and its alteration products exist together in the soil. Interactions can be complex due to soil chemistry (e.g., charged groups on organic molecules in soil). What's important is that a potential difference gives rise to a DC electric field. The required amount of soil moisture is probably low.

The larger the extent of an electric field, the more it's going to interact with the coil of a metal detector.

3.) By generating a magnetic field due to the movement of charge. There has to be some dampness for ions to move, though really not that much; consider a so-called "dry cell" battery. More water helps, of course, such as after a couple days of rain.

A detector works by inducing a current in a metal object. This induced current causes the object to emit its own magnetic field. This in turn causes a back-induction in the search coil. If the target is already emitting a field of its own, this is going to make it easier to detect. I have found buried plastic pipes with a metal detector, but they always had water moving through them. Moving ions = magnetic field..."

[Funfinder]

Hallo???
(this is german and means: Hello???)

Hallo, it is called Halo Effect and finds usually not dissolve in the ground - only thin cheap iron sheet metal !
This whole topic here is some "LRL-pseudo-science" and nothing else.

If the 2000 years old silver coin once had a weight of 10 grams and now it has 9,50 grams,
exactly 0,50 gram "dissolved" into the ground and have been washed away by the water
over the years.

And not even some 1000 year old steel-nail dissolves much more.

Most motion detectors not even can recognize weak changes in ground-mineralization
so why they should be able to detect any pure hypothetical "metalization"-fields around the find?!

The only thing which really can have some effect is the "black earth":
Once lived people at spots with old finds and they burned a lot stuff there.
For the MD the black soil is a little bit like coke seen from the mineralization.
It's the "cultural layer" of places where settlements were long ago.


And now its time to see some real beautiful Halo-pictures and to learn about the 22° angle!

http://earthsky.org/space/what-makes-a-halo-around-the-moon

http://ww2010.atmos.uiuc.edu/%28Gh%29/guides/mtr/opt/ice/halo/22.rxml

[ivconic]

http://www.njminerals.org/metaldetecting-haloeffect.html

Excellent elaboration! Must read!

"...VIII. About That Detector
So.... don't fret about your brand-new detector. It wasn't designed to detect coins that you buried five minutes ago beneath six inches of soil.
In fact, if your soil is highly mineralized or has teensy bits of metal junk in it, this "soil air-test" can fail with just two or three inches of soil..."

[ivconic]

Hi Ivica,

I guess now this makes me dig whole plugs out and bring them home for testing ..lol I have watched many videos on youtube especially Russian (Klad)- I believe meaning treasure in in Russian, i must say i observe something interesting there and that is the x-terra 705, man bloody hell this detector took lots of clay pots out of the ground. I saw air tests with the x-terra but they are not impressive. There are 2 possibilities either the detector was cheap and everyone bought it so obviously found accidentally all these treasures or is the Hallo effect at play and the detector performs well in that regards.

https://www.youtube.com/watch?v=2RwFNA3XJSQ

Question is why x-terra 705 ? and not other detectors...

That's excellent question!
Puts the light on another "factor" in this story.
As i said previously:
"... Because it is only single "variable" in very complex formula with lot of other variables..."
Yes, exact brand and model could also be the important "variable" in such "formula".
There are several md features on the line to be taken and included in to such "mathematics";
- Working frequency,
- Type of coil (DD, widescan, "Omega"...)
- Processing filters included in such desing, directly defining it's genuine purpose; relic hunter, coin shooter, beachcomber...
On some soils and some targets X-Terra will behave like that.
On some other soils and some other targets some other model will behave like that and X-Terra won't.
Story is very complex. Again i will repeat:
"...Natural genuine "hallo" effect is very complexly conditioned phenomena..."
And that's also another very strong argument to support my standing point that i exposed here.
You simply can't rely on the results gained on testing beds.
Such results are not reflecting the reality from the real situations.
Sometimes those are too far away from reality.

[steaua581]

Hi Ivica,

I guess now this makes me dig whole plugs out and bring them home for testing ..lol I have watched many videos on youtube especially Russian (Klad)- I believe meaning treasure in in Russian, i must say i observe something interesting there and that is the x-terra 705, man bloody hell this detector took lots of clay pots out of the ground. I saw air tests with the x-terra but they are not impressive. There are 2 possibilities either the detector was cheap and everyone bought it so obviously found accidentally all these treasures or is the Hallo effect at play and the detector performs well in that regards.

https://www.youtube.com/watch?v=2RwFNA3XJSQ

Question is why x-terra 705 ? and not other detectors...

[Nexus]

That article on Gary site has been changed over time. It used to mention the 'sixpence at 10 inches' test more, but I recall that just about every machine failed to detect it, and it was considered a test failure. And originally, the 'myth is busted' statement was attributed to someone....gotta say I thought it was Georgi of Nexus detectors. I'll try and find out more...

You are correct. This article in Gary's web site was at some point attributed to me, because I have buried the 1 kg of British coins in Gary's garden my self and I also have explained to Gary in detail what the whole story with super depth claims is about.
It is the same hoard that Gary used to claim that the Deus can get it, but that was before he removed the concrete pole out of the ground that was only 10-15 cm away from the hoard position.
Gary have at least two Nexus detectors in his storage and he knows very well that the silver six pence at 25 cm is no challenge for Nexus at all. But then he is working for XP now and I don't think he would talk much about Nexus depth performance anymore.

Finding six pence at 25 cm is very easy once folks learn how to use their detectors in true all metal mode.

I have also buries 1 kg of small Roman coins at 60 cm. in Mike Longfield's garden in Coventry. No one after 10 years have managed to find them by now. Not with Deus or CTX or any other detector.