"This myth is Busted"

[Nexus]

I am not going to argue the toss with you or bet my sheep station, but have you actually tried this ground charging ? its a yes or no answer.

You can not charge the ground ever, because it is not a self contained unit like a battery. What you can do and what the Doubler is doing is passing current trough the soil that results in Eddy currents been formed in both metal targets and soil particles.
Tried it or not is irrelevant. What's relevant here is the scientific basis. And Halo effect have no basis in this case.

[ivconic]

Ok.
But usually you cut off and toss to garbage the rotten and stinking flowers from a garden, right?
...
In short, i was hoping that something positive will evolve from this topic, in best words explained by Skippy:

...I think there would be some good science to be done there...

[WM6]

[QUOTE=ivconic;230018]

WM6 don't waste your energy on mindless ignorant illiterate remarks by some distractive characters here, just use Ignore List and enjoy!

[ivconic]

https://dl.sciencesocieties.org/publ...ess=0&view=pdf

[ivconic]

"...The ability of soils to adsorb metal ions..."
"...Adsorption is a major process responsible for accumulation of heavy metals..."

[ivconic]

"...Adsorption is defined as the accumulation of ions at the
interface between a solid phase and an aqueous phase..."

http://nyackcommunitygarden.info/pdf...ls_in_Soil.pdf

[ivconic]

Let's back to topic:
http://www1.udel.edu/soilchem/Roberts05ChemProc.pdf

[ivconic]

Most recently i discovered all the beauty of "Ignore list" option on this forum.
After 11 years of being here i started to use that option several days ago.
The sweetest thing that i saw on this forum so far!
I put several characters on my Ignore List and now forum looks much much better.
But i would like to ask administrators if there is a way also to prevent to see such crap posts even when are quoted by other members?
Is there any way to fix that?
I would be very pleased to solve that too.
I can't stand not even to see a single sentence written by some characters here.
Not because any other reason but because such pathetic characters are having indeed nothing to say here. Nothing truthful and nothing contributive.
And their presence is spoiling the topic pretty much.
Oi administrators! Is there any way you to fix this?
Is there any way me to choose who will join this topic or not?
How about offering us some moderator's privileges, so the one who started topic to be able to allow or disallow joining of others?
That's pretty good practice on some other forums.
Think about that for a while.
That's excellent method to prevent problems and deliberate distractions by various characters.
So many topics were been spoiled totally so far on this forum like that.
...
WM6 don't waste your energy on mindless ignorant illiterate remarks by some distractive characters here, just use Ignore List and enjoy!
Everything else you can read here:
http://www.njminerals.org/metaldetec...aloeffect.html

[WM6]

There is a basic science behind all things.
You can not charge the soil with anything, much less with ions. This charging is nothing but a marketing manipulation.
There can be no ions due to oxidation, because oxidation produces salts, not ions. Ion is a free particle under certain conditions and only for relatively small amount of time and you will find no free ions in any soil, ever.
All detection of metals is based on induction of Eddy currents and absolutely nothing else.

Probably soil chemistry is not a simple science, it is about electrons but is not limited to electronics.

[6666]

There is a basic science behind all things.
You can not charge the soil with anything, much less with ions. This charging is nothing but a marketing manipulation.
There can be no ions due to oxidation, because oxidation produces salts, not ions. Ion is a free particle under certain conditions and only for relatively small amount of time and you will find no free ions in any soil, ever.
All detection of metals is based on induction of Eddy currents and absolutely nothing else.

I am not going to argue the toss with you or bet my sheep station, but have you actually tried this ground charging ? its a yes or no answer.

[Nexus]

Er... no. It is not how the device was supposed to be operated, and that's why I think the ion mechanism should be examined. The Depth doubler was supposed to "charge" the soil for half an hour or so, and I believe it has to be accepted quite literally. If ions due to oxidation are present around a target, those should at least provoke some salt-like detection in a volume far exceeding the dimensions of a very target. I'll try to model that and see where it leads.
If there is nothing to it, no big deal. Nothing changes.

There is a basic science behind all things.
You can not charge the soil with anything, much less with ions. This charging is nothing but a marketing manipulation.
There can be no ions due to oxidation, because oxidation produces salts, not ions. Ion is a free particle under certain conditions and only for relatively small amount of time and you will find no free ions in any soil, ever.
All detection of metals is based on induction of Eddy currents and absolutely nothing else.

[ivconic]

First time I have heard of Depth Doubler, it runs off 12v motor bike battery, less than 1 amp

http://compass-metal-detector-forum.548136.n2.nabble.com/Depth-Doubler-Manual-td4407630.html

I collected those screenshots too. Very hard to find more details.

[6666]

First time I have heard of Depth Doubler, it runs off 12v motor bike battery, less than 1 amp

http://compass-metal-detector-forum.548136.n2.nabble.com/Depth-Doubler-Manual-td4407630.html

[Davor]

...So when this electrical charge hits metal targets it induces Eddy currents in them making them to appear much closer to the metal detector, thus getting deeper results...

Er... no. It is not how the device was supposed to be operated, and that's why I think the ion mechanism should be examined. The Depth doubler was supposed to "charge" the soil for half an hour or so, and I believe it has to be accepted quite literally. If ions due to oxidation are present around a target, those should at least provoke some salt-like detection in a volume far exceeding the dimensions of a very target. I'll try to model that and see where it leads.
If there is nothing to it, no big deal. Nothing changes.

[ivconic]

I think the 'Inverse 6th Power' effect is very relevant to the 'halo effect' discussion.
Even if you proposed that "halo effects cause a +20% increase in target signal" , that still represents just 3% depth increase. To make any obviously measureable 'depth gain', quite significant signal strength gains are needed.
I'm not so sure how much adverse effect major corrosion has on detectability of the coin itself. I feel that the porous 'sponge-like' metal is significantly higher in resistivity, and that makes the coin 'higher-frequency' , which in turn can make it stand out less from the ferrous/mineralised soil signal. But I'm not so sure the coin actually appears 'smaller' or 'weaker', ie. harder to detect.
A comparison with a freshly-manufactured clone of the coin/item would be interesting. Example: a typical hammered Medieval Penny we find in the U.K has a well-known composition, Sterling Silver 92.5%, and thickness, diameter, weight are all easily measured. I think there would be some good science to be done there.

Quite correct.
Few posts earlier i mentioned the "republican" and "colonial" mints very purposely. To emphasize the huge differences between alloys and quality and diversity in such targets.
And that's also has a lot to do with what you can expect on the field.
It's quite different situation with modern coins which are made with pretty high scale of uniformity. With those you know what to expect.
Here is the photo that shows the diversity. Two coins, same nomination, same age, same site, same mint. Distance between them was 15 meters.
The one on the right side preserved better, the one on the left side is burned totally by the organic waste. Quite different two targets in the Deus's "eyes".
Another photo; most of the finds are from the very same site.
Almost all of those were "deeper" in soil than later in air. What was the difference? Significant and very noticeable. From 1cm up to 5-10cm.
It is hard to make mistake on this, it happens all the time at some sites.
However; it will never happen on testing bed.