Jeohunter - Visual Ground Scanner

[Qiaozhi]

Of course you have to search in "iron on" mode for maximum depth ...

In that case your test is not comparable to either Carl's or Gary's cache tests. These tests were carried with iron discrimination turned on. Otherwise you may as well use a PI detector, and also be able to sweep the area at a faster speed.

[Funfinder]

Thanx mechanic for this important reply, made some tests before I answer now:

In my test-room there is an area around 2x2m consisting of ca. 1feet - 40cm thick
brickstones on the ground. Those are highly mineralic so I tested to get away any
ground response. It was possible at ground balance minus 130 and at sens. 60%.

I was able to lift the coil from 5cm to 30cm without signal as if there wouldn't
be any high mineralized "claystones" at all.

So this is very important for areas with gold and black sand and it proofen works, but:

The more the detectors sensitivity is raised, especially with a 50cm coil,
the more different and weaker changes it will receive. This contains the "air-distance"
coil to ground plus the metal on the searchers body plus different strong mineralized
stones or ground-situation.

The more powerful the s/n ratio react on higher sensitivity and larger coils the
more easier it is to get an unbalance of induction coil A and coil B. Holding the
coil slighty uneven to the ground can be enough.

The best solution at such very high mineralic sites where high sensitivity is needed
is a reset button that can be pressed directly at the coils-handle - I made this mod
at my Jeohunter - so it's possible to adjust and set the electronic within half a second
to the actual ground-conditions.

We must not forget - ground does not consist of a homogenous mass. There are
more or less mineralized stones, areas without mineralisation, sand, earth, grass,
moisture, salts, roots and alot more stuff, perhaps even not very deep bedrock.

The more sensitive the detector and coil is, the more differences it will detect.


If I would have swept the Jeohunters coil faster over that 2 feet coin cache
the signal would've been very short or missed. This is not a motion VLF-MD
and it takes its time to recognise weak metal objects. Moving the coil very
fast works well on good detectable stuff but on very deep or small objects
moving the coil slowly gives better and more accurate results because this
is a complex ground mass such big coil influences and get's influenced from.

I guess the coins metal isn't very important. But the total weight and the shape
you place them. What detector do you use? You can try some in air test with
different cache diameter or put it in a plastic-sack and form a little ball etc.
Or you can try to fill the hole just the half with soil and ground material to
test how long it's detectable if it's very strong mineralized stuff.

However using PI on heavy mineralized soil has it's own technical issues.
If I read you need pretty accurate mikrosecond timings I have my doubts...

And the IB-technic that Jeohunter uses it not comparable with Motion VLFs -
as example I heard that the Garrett GTI in red clay only detects 3 inch down.


But finally back to frame 1 - from my Jeohunter experience it is possible to search
at very high mineralized ground even at 70-80% sensitivity (we have areas that
consist of strong mineralized clay only) without problems but the coil should be
moved there more slow and with somewhat the same distance to the ground.
Especially if you move the ground balance value to around minus 100 or
at black sand or hotrocks to minus 150 the "ground elimination" will do
a pretty good job and with little experience you will know for shure before
if this is really metal beyond that heavily mineralized soil. More info here:

High mineralized brick stones test!

http://www.geotech1.com/forums/showpost.php?p=124954&postcount=170

[Mechanic]

Keep in mind the stronger the mineralisation the more careful has
to be searched because the signal noise ratio of the huge ground
resistance changes very fast if the coil-ground distance varyies.

Good morning Funfinder!

The above quote is of particular importance to anybody considering using one of those machines to search for gold in highly mineralised ground. A good ground balancing detector should not have this problem, the coil should be able to be raised and lowered to the ground without any false response The areas I detect have very strong ground response, with high amplitude signal just after tx turn off and a decaying signal that can last in excess of 200us, just like a big target. I would suspect that the stronger the ground response the more sensitive the joehunter would be to small changes in coil height?

Now for your tests, I am impressed that the joehunter could detect the coins at that depth, but what would happen if you were sweeping faster? I might do a similar test at some stage, however the coins would be different to the ones that you have, but they will be all non ferrous. I am confident that I will be able to detect them even in highly mineralised ground, well I hope so!

[Funfinder]

The famous test - 1kg coins-cache 2feet down! Success!

enjoy movies and pictures part 2:

http://www.multiupload.com/OZ2VH93JZL

It rained over night but that was nothing - there is absolutly no doubt
the Jeohunter detects this 1kg cache at 2feet - watch the 3 movies.

As you can see the signal is week but it is there and it worked good
with 90% sensitivity and even shorter at 80%.

I also used this occasion to test if the Garrett GTI 1500 with 45cm
coil may be able to detect it. No way. I had to search at 60% sens.
because of the nearby kV-lines otherwise the beeping concert gets
really annoying. I also got only a very week undistinguishable and
fainting signal in pinpointing mode.

The Jeohunter got the 1kg cache clearly but because of the weak
signal the "what kind of metal is it" analyses scanning didn't work.
This is nothing unusual and all MDs have this problem but it is very
important to tell it here because if you get such weak signal which
clearly is repeatable it really may be better to dig it out even if you
don't know what kind of metal it is. The important thing is to know
that the detector has the power to detect such very deep objects
at all.

Of course you have to search in "iron on" mode for maximum depth
and tuning the Ground Balance to high mineralic level can give you
extra depth for meteorites and long time buried iron or steel objects
while setting it to +100 it is more sensitive to silver and aluminum.

Keep in mind the stronger the mineralisation the more careful has
to be searched because the signal noise ratio of the huge ground
resistance changes very fast if the coil-ground distance varyies.

btw.: After extracting the coins I went to a nearby field and dugged
some ironscrap-pieces, ca. a half kilo and put them into this hole and
closed it. I could detect them, too, but this time it was alot harder.
However I created a nice spot for special depth- etc. testing and
I will check out later if there really starts some halo-effect that
makes detection easier sometimes.

[Funfinder]

joejoe,
you really have to know what you want and where you get good information for what you may want. It also depends how motivated and experienced you are. If you don't wanna risk anything get yourself some cheap PI-beach hunter or this beginner Nexus induction balance, pay 500bucks and have fun. btw. You have enough information already here.

[joejoe]

Sounds good funfinder, thanks for the detailed information. Too bad so many others are unconvinced, it makes decision making difficult. Gotta go check the taroh cards...

[Funfinder]

Sorry, I meant the JEOTECH, not the jeo hunter. That for two grand would have to be a five-finger discount sale.
Someone on thunting says he bough the jeotech and everyone is awaiting his experience with anticipation. Too bad these dealer don't accept promises. "I SWEAR if you give me this machine now and I find gold I will pay you back!"

Well joejoe - first you have to deal with little stuff and work your way up to the top.
This rule applies to alot stuff in life.

Having debts somewhere often also is just a "promise".
If the MD dealer won't accept it look for other people, you may find some.
Or you make a nice summer holiday as alot european at the moment in turkey
and go a bit shopping in Istanbul. Or get it from italy. Import from europe.

And one important factor:

Buying a metal detector is a serious investment into your future!

Such device even in 10 years can bring you huge profits plus enjoying hobby.
And if those have been really pirate-hotspot-islands you live and you have
serious information at what locations something could be hidden don't
throw your chances away. Life's too short for this! Use every good chance you can get.

[Funfinder]

The famous test - 1kg coins-cache 2feet down! Success!

That I came to this test at all was a series of coincidences.

http://www.geotech1.com/forums/showpost.php?p=131199&postcount=193

Found this thread by searching for a completly different keyword.
And yesterday when I made that test first I wanted to dig a new deep
hole but finally I reminded just using the site nearby stones-hole.

If you read the above link you have already the most info.

Also interresting:
First I tried if the Jeohunter will find the coins in the open hole.
Because if not it would haven been useless to close it and reopen it
for getting the coins back. But now that coins are still down there
for further tests - but you have to be very fast for good ideas because
I will extract them soon again.


The Jeohunter has passed this test, I can guarantee you and everyone
who can make the same test will confirm it. This is a very worthful award
because so far just one machine with a huge 20x40inch coil could do it.


I digged that hole deep as fast as possible so it has no large diameter
and that's the reason why I couldn't dig out a large stone at the 2 feet level.
The coins are next to this stone down at 2 feet but the space for them
was small (12x8cm - compare it with black cover size).

I would liked to make 2 tests - one with more wide spreaded coins
to check if there is a difference. I'm shure, because if you stack those
coins the distance is reduced.

btw. I found already a 1,5kg cannonball at around half meter, too.
The mass-depth ratio in that case was just slightly better and I found
it at just 70% sensitivity.

The coins have been detected without any "maybe" halo effect or not
but if such should exists not only for iron the depth would have been
deeper than 2 feet.

I used Ground Balance around plus 100 because that way the Jeohunter
is more sensitive to noble metals. But later I also used -100 and there
was not alot difference. The metal of the coins was pretty mixed and
just with 1 silver coin. The main was copper, alu and cheaper stuff.


Here is the link with the pix and movies:

http://www.multiupload.com/58M6W315I8

I have to say that the signal / noise (s/n) ratio was very good.
There are huge 180kV powerlines plus a smaller electricity line near
but the Jeohunter is immune against such stuff incl. the sparks of
carmotors or bikes and other electro-smog sources!

And every MD should be immune against such influences because
those can kill 50% of the whole sensitivity! And such EM-pollution
can be found on more places than somebody might think and the
result is extremly annoying.

And all detectors should have manual ground balance and
cavity detection otherwise some could miss precious meteorites etc.!
The Jeohunter is "complete", and thats what I really prefer compared
against those almost all some kind limited other detectors.

btw. the ground consists of limestone mixed with wet sand and clay there.
Once there flow a river and 3km away a roman milestone was found.
Perhaps someone knows exactly how strong the mineralic level is.

If you watch the movies please don't think there's some metal
hidden in the stone-pile. I'm too proud and worthful myself for
needing such childish tricks. And if I'm filming today the closed
hole test don't think I put some coin or something below the
surface - I don't fool you and not myself. The Jeohunter detects
those 1kg of metal in coins down there 2 feet - I've seen it already
and I could repeat that test all the time.

However - this test REALLY is a challenge for metal detectors.

If you don't find the coins in air or with open hole with your detector
you will have no chance if that cache is buried. At least not if it has
ball-shape - because this is with coins just 2inch or 5cm diameter.

One proof that this test is authentic is that I have used that small
area for the coins. It would have been much easier spreading the
coins over an larger area, let's say 15x15cm (6x6 inch).

A second proof is the very small flat line on the screen - it indicates
a very weak signal.

And a third the 10x10cm object at 75cm distance directly from the
Makro Group product description table. I know, they're talking about
a solid peace or plate of metal, but at 2feet that coins are also working.

btw. you can ask Moe DiPinto from www.metaldetector.com to make
that test, too! He sells those MDs to America and has no interrest
getting angry or disappointed customers! That's for shure!

However, it's no miracle - it's just the right fitting coils-size for
such kind of objects and depth. And if caches are that "small" and
buried that deep don't go treasure hunting with a 8'' or 20cm coil!

Everything has it's price and in that case the coil and powerful battery
is a bit heavier but it pays off if you want to get to the exclusive finds!
And if we are all lucky it won't take long and the Jeohunter will get a
nice weight reduction with even larger coil.

Because I'm planing to create a highgain handheld 25x18inch coil
and the Jeohunter is perfect for it - it can handle already the much
larger 1m to 65cm coil!

This cache test was a nice successful experiment but I'm personally interrested
in targets with much more depth! Those exist and those are really precious!

Deciding very wise after many infos to buy the Jeohunter first really was big luck!


ps: I write it again for a 2nd chance:
If you want a special test tell it very soon.

[Funfinder]

hi joejoe, my answer will following below.

[joejoe]

Sorry, I meant the JEOTECH, not the jeo hunter. That for two grand would have to be a five-finger discount sale.
Someone on thunting says he bough the jeotech and everyone is awaiting his experience with anticipation. Too bad these dealer don't accept promises. "I SWEAR if you give me this machine now and I find gold I will pay you back!"

[joejoe]

Ok, thank you funfinder. I will sit on this like a mother hen and keep the idea warm.
Very good information for me.
I'm not sure what I will do, buy a used vlf maybe a sovereign (or something similar) for maybe $500 to (I can afford that for now) and search the shallow end first and then go swimming deep with the jeo or a pi with a large coil later when I have more pennies to rub together. If the jeo would work in this location I feel I would want that to tell me that there could be big iron (at least) down there deep, yet also maybe find interesting small things if I choose to investigate further, and maybe tell me if there is a gold coin that was maybe dropped at some time past floating near the surface.
We shall see. If it could do that it sounds good. Thanks for the help.

[Funfinder]

Hi joejoe,

thx for the new very informative reply.

One big question is:
Is it flat or "volcanic steep" at those island(s)?

And what you need is a half meter coil if you're searching without second person.
The bulgarian deeptech PI has such coil, also from kts-electronic.com in Germany.

The first has only magnetometer iron-disc built into the 1m coil, the kts one
has electronical disc that works for middle size and larger objects.

Price ground pioneer 4500 pi around 1500 Euro, kts pulse AR III is 2 grands.


This is almost the same as Jeohunter with 0,5m coil in Italy or Turkey costs.

The Jeohunter discriminates perfect little nails and I even had problems to
detect 10cm / 4inch cannonballs clearly if "Iron" is set to off.

This is because Induction Balance "non motion" seems to distinguish very
good the magnetical parameters of metal objects - much better than PI.

And if not the whole ground consists of a thick layer of black sand and those
special strong mineralized rocks you will only find the later as "cavity" but
because most of the time there isn't any cavity in ground anyway you will
know it's such rock and you can ignore them.

The Jeohunter is perfect if you wanna find bigger stuff but it also can detect
just 4grams small coins or buttons with good iron-off disc and ground balance.

If you wanna go the cheaper way you need to find a PI with half meter coil
and the german kts PI with disc. costs also 2 grands - less depth but more coils.

http://kts-electronic.com/content/view/27/155/lang,en/

btw. Thanx for the mikon or mikron bulgarian PI info, never heard of it.
There also exists a deep going detector called Demet MAX FLV from poland.

I haven't tested all those german or bulgarian PIs so far but there exists some
serious warnings that PIs and hotrocks (like you have in your regions) are not
a very good combination - especially if it's a cheaper PI machine.
And don't forget you need a working half meter coil for this PI if you wanna
hunt on your own. And most of them have no disc.

btw. if you really can get a Jeohunter standard edition with 45cm coil for only
2000 bucks you are very lucky - I paid alot more but that's still a good value.
And if you have enough of rusty nails and stuff better don't bother with PIs:

Either they won't find them with half meter coil at all because they're to weak
but if so you will miss alot valuable stuff, too, or they find them but probably
can't discriminate them because they have no disc or work just for large stuff.

And if you had already some PI experience you know the pro and cons.

If you can buy the Jeohunter for just 2 grands get it - you won't regret it!
The coil is too heavy for very steep regions but if you don't search there you
will get with this detector the best chance to find the most really valuable stuff!

[joejoe]

Thanks for the reply.
I've had a pulse 8x before, though the coil was the standard 8 inch, I think. Found small things from before but the depth of these isn't really that deep. I am not all that interested in small coins, as the areas have not had much habitation, instead looking for bulk one time. I've been recommended deepers,, lorenze, some units with depth multipliers, and bulgarian units, mikron, etc. Mikon has one pi with a 1x1 coil that can go down 3-5 meters for around 400 Euros or so, not too bad. I'm not interested (at this time) in looking down old well holes, more around 2-6 feet or so.
Someone passed through once with a whites and we found a couple of modern coins from other countries (neat) and I saw that VLF were kinda nice for differentiating the metals and whatnot. My pulse couldn't so I dug alot, mainly old nails. Which wasn't bad, mind you, history is always interesting, but when I used the whites if it said nail it probably was. As the spirits destroyed my pulse, I am looking for something else, this time with some serious depth.
This soil is FULL of iron, drop a magnet in some spots and see the iron stick to it. This Jeo can that? It didn't seem to worry the whites too much, but of course it could go nearly as deep. Maybe it doesn't matter?
Some of these volcanic rocks are scattered about, most size of a medicine ball, some way big. You say they may be read as void? Hmmm... I wouldn't want to miss a clay pot thinking it was a rock. Let me know if I understood that correctly.
Yes, that is why I am in the market for a serious detector. Deepers has one, 2x1 that runns both deep pi and with the change of the coil and a flick of a switch can toggle between VLF and PI. Not too bad, price is similar to the jeo I am looking at.
So, do you think the jeo 2 grand can give me what I'm looking for?

[Funfinder]

Yesterday I saw the disadvantages of an usual "small coil-detector":

Went to a site the last time I found 5 cannonball-granade-shards with Jeohunter and wanted to find some more. But this time found little stuff only so disc. just by coilsize really is a very valuable option under special circumstances! The only problem is the Jeohunters standard coil incl. holder is a bit to heavy for steep mountain regions but for usual sites the weight-power ratio's damn good.


@joejoe
The Jeoscan with LED have smaller coil and therefore less depth. btw. it doesn't matter if LED, LCD or black-white dot-matrix screen - usual only some kind of sound output is enough.

What you need at your island for shure is a detector with large coil and the price difference between Jeohunter (standard) and PI isn't that big. Or you can get selfbuilt PI pretty cheap but large coil combined with high mineralic ground always needs detection-experience. If the volcanic rocks layer always is the same the Jeohunter will penetrate/detect as easy as through mineralized hotrock brick-stones otherwise you may detect sometimes cavity where the mineralisation is stronger. But PI can drive you nuts at such regions if it hasnt real good groundbalance.

joejoe it also depends if you're using a metaldetector for the very first time and how fast is your learning-experience curve. But if there really is the chance to find some nice treasures on that island better get yourself a real detector with large coil first. Good luck!

[joejoe]

Thanks for the writeups funfinder. You would think if someone DID pay a few grand for these "nintendos" and they didn't work, they wouldn't be ashamed to tell how they got ripped off. Nice to see you don't get crazy with someone trying to take you down every second.
WM6, why don't you try to check out one of these personally so you sound a bit more sane with your arguments?
These units with the screen are out of my range, but what about the simpler ones with the LEDs? Were you writing on these too, or only the graphical ones? I live on an island in the caribean and would like to explore several areas. The island has salt water (of course) and large volcanic rocks under the ground. Problem? From what you say, it shouldn't be, though I've heard many recommend pi's to me for these conditions and not VLF's. 2 grand is kinda dear, but I could save for a while. Thanks.