Halo Effect - WTF !!!!

[J_Player]

I agree field experience and testing is stronger than theory from science. I am asking people with scientific theories to show scientific reasons why hundreds of people find signal weaker after digging ancient coins from the ground.

I think there is no science to prove all these people are liars. Maybe if scientists look closer at real experience in the field, then they will discover the real science why people see strong signal for long time buried non-ferrous metal.

Best wishes,
J_P

[Great_Alex]

you try to prove your wrong idea without any test and experience
The Halo effect for ancient target or old buried target realy exist

after dig and in the air test signals become very weak .
on the devices like OKM products , it can detect old buried gold but can't detect fresh gold (like a Magnometer) .
PI detectors detects targets very deeper than normal , maybe many times deeper but making pinpoint vary hard .

the reason of halo effect changing the magnetic filed of soil around the object and produce secondary magnetic field with diffrent direction with earth magnetic field ( in the object) and make disturbance in normal magnetic fileds power in positive (like iron) or negative (like gold) direction .
the magnetic filed around the objects changes by Magnetic Susceptibility of object , if target turned the socondary em field become weaker and you see hlo effect reduced .

Best regards
Alex

[J_Player]

I have studied physics and chemistry too. I know no reason why there would be any "halo effect".

But this makes me wonder why not only Ivconic and Max are reporting that the signal becomes smaller in air after they dig up ancient non-ferrous coins. There are people all over the world reporting the same as they do.

Do you have any science that explains what hundreds of people experienced all over the world? Or are tehy all liars?


Best wishes,
J_P

The "halo effect" was invented by Fisher to sell his early detectors. The only time a non-ferrous object develops a significant halo is when it is in extremely corrosive ground. Ferrous objects develop halos, but the halos cancel out the objects.

Non ferrous objects can not create any kind of halo detectable by any metal detector. Coins can produce in most cases non conductive oxides as the ones on their very surface.
Any oxides or salts produced by galvanic processes or decomposition are first of all too insufficient to provide path for Eddy currents. Even if some conductivity could be registered around any coin under ground that area would be too deep for any detector to pick up a signal, providing that the halo is getting detection depth further down.
The case with the iron.
Iron is not only electrically conductive, but also magnetic material. In the process of physical decomposition the small iron particles or iron oxides will increase the paramagnetic properties of the soil, but they will not alter the soil conductivity. Take a ferrite ring for example. All detectors can pick a ferrite ring but non of all ferrite rings are conductive, they are paramagnetic. A significant number of small iron particles can create around a nail (for example) a zone with stronger paramagnetic properties, which in all cases will result in lower negative phase shift in the RX compared to the clear soil.
That is how halo effect can occur naturally around any iron object.
Around non ferrous objects halo effect is impossible to occur, because they are not magnetic or paramagnetic and halo is not a result of conductivity but result of paramagnetism.

I would advise anyone interested in halo theory to study a bit of physics and chemistry before making guess shots unless they have a lot of time to waist.

[Max]

The "halo effect" was invented by Fisher to sell his early detectors. The only time a non-ferrous object develops a significant halo is when it is in extremely corrosive ground. Ferrous objects develop halos, but the halos cancel out the objects.

Hi Elie,
yes you are right on advertising. I think many people said it exist and develops fast cause of just advertising of old products that otherwise they cannot sell to anyone anymore.

But I don't rely on advertising. You know.

I've seen it with my eyes... that's why I'm sure of that it exist.

Cannot explain why... have just some ideas.

Of course, happened to me not with few years buried stuff... like manifacturers say... no, no....
just with very ancient stuff , only with that stuff and not always.

Kind regards,
Max

[Max]

Good point, except that hundreds of people are also reporting that they've seen ghosts and UFOs.

Hi,
yes, that's true. Many reports of UFO and aliens... and no proofs.

but you can see with your eyes halo effect if you use a sensitive e.g. VLF detector and find ancient (e.g. >1000 years) nonferrous items.

I've seen it a number of times and effective one not impressions by myself. Other people were with me in some of this searches and saw it too.

But of course... I think too that there aren't scientific proofs of that.

Just the phenomenon shows and seems exist... then you dug stuff and find you can't detect in air at same depth you found it in ground.

Kind regards,
Max

[Qiaozhi]

I read stories from many forums where metal detectorists find evidence of halo when they dig ancient coins and when they dig gold nuggets. This makes me wonder if there is something wrong with the tests that prove it does not exist. Did anybody test for halo on an ancient non-ferrous target that has been buried for more than 1000 years and measure the difference of detection length? The tests I read seem like maybe they don't account for some of the possibilities of halo.

I know no scientific basis to explain why there could be a halo for non-ferrous buried targets. But how can science prove it does not exist when hundreds of people are reporting that they see it? Maybe there is a correct scientific reason why people see halos that has not been found yet?

Best wishes,
J_P

Good point, except that hundreds of people are also reporting that they've seen ghosts and UFOs.

[Elie]

Hi Esteban,
my friend... ehm... don't know how to say...

but Nihil wrote :

"Ehhh!!! Of course, and this is the reason why electronic LRL acts good with old targets. I found a couple of 34 copper coins –25 mm diam each– and comprobe how the surrounding earth was affected by copper migration... like electrochemistry, galvanization of the soil! This enlarge the size of the object/s. Maybe is not viewable in an only coin, but yes with 34 corroded copper coins...

Non ferrous causes more halo than ferrous. In aparience ferrous causes more because targets iron in general are more bigs."

Think you and him have to find a gentlemen's agreement.

Kind regards,
Max

The "halo effect" was invented by Fisher to sell his early detectors. The only time a non-ferrous object develops a significant halo is when it is in extremely corrosive ground. Ferrous objects develop halos, but the halos cancel out the objects.

[Max]

OK Max, halo effect good for MD, but bad for electronic LRL! Democracy

Hi Esteban,
my friend... ehm... don't know how to say...

but Nihil wrote :

"Ehhh!!! Of course, and this is the reason why electronic LRL acts good with old targets. I found a couple of 34 copper coins –25 mm diam each– and comprobe how the surrounding earth was affected by copper migration... like electrochemistry, galvanization of the soil! This enlarge the size of the object/s. Maybe is not viewable in an only coin, but yes with 34 corroded copper coins...

Non ferrous causes more halo than ferrous. In aparience ferrous causes more because targets iron in general are more bigs."

Think you and him have to find a gentlemen's agreement.

Kind regards,
Max

[Esteban]

OK Max, halo effect good for MD, but bad for electronic LRL! Democracy

[Max]

what kind of metal detector is that he's holding in that picture ?

looks fairly compact.....


;-)

Hi,
well... from the shape.... I think that could be a new kind of LRL... you know that also HALO is an important part of their ehm... "theory of operation" !

Kind regards,
Max

[CrazymanBrad]

what kind of metal detector is that he's holding in that picture ?

looks fairly compact.....


;-)

[Max]

of course, there are many kind of halo...

BTW I find really interesting the one in the picture below...

very relaxing !

[Max]

Hi,
you're another joker !?
Maybe you understand of gold nuggets (maybe)

To see the HALO with your eyes have to change place... you can find kangaroos there but can't find any ancient metal item buried.

Let the people here that find those stuff tell you that it exist... not always... and one way or another... who knows why !? But it's there.

And when you see it one time you belive in it forever.

You have to belive in the power of HALO!

Kind regards,
Max

[Woody.au]

Did you know that if you shade the target from the Sun with the detector coil the signal becomes louder. If you detect from North to South you get less interference from the Earths magnetic field. The Halo effect is Gods way of helping you find what you arte looking for.