Jeohunter - Visual Ground Scanner

[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]

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/showp...&postcount=170

[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.

[joejoe]

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.

But still, for scmucks like me, it is still good to know that the jeohunter CAN at least detect it. Would the others in the cache test have found them with the dicrim off? I don't remember. I'd have to go back and check if that is mentioned.
Good job for a thorough test, sounds like a lot of work. I think you have a tough audience.

[Qiaozhi]

But still, for scmucks like me, it is still good to know that the jeohunter CAN at least detect it. Would the others in the cache test have found them with the dicrim off? I don't remember. I'd have to go back and check if that is mentioned.
Good job for a thorough test, sounds like a lot of work. I think you have a tough audience.

I quote from Gary's Detecting website, where the cache (hoard) test originated:
"We are not interested in testing a machine with no discrimination circuit as you would not search in all metal on a junky ancient site."

So I believe the answer to your question is that no PIs or VLFs (with discrimination turned off) were tested. Although I think Carl may have tested a TDI on his own cache test.

[Funfinder]

Qiaozhi,
only with iron disc. is a point but pretty useless if you wanna go for very deep stuff.
No real treasure hunter would be that stupid to lower the depth sensitivity of his
detector if he's really looking for very deep stuff.

FIRST those guys with PI have to know if their machines are powerful enough
to find this cache with iron on at 2 feet otherwise the distance for this test
is unusable. Otherwise why we don't say 4 feet or 10 feet so no detector
will be able to find it at all? Because it would be nonsense!

And SECOND besides that 1kg of coins (no definition what size and material)
there has to be set a diameter value because if I spread those coins so they
will cover an area of 1 feet x 1 feet anyone may detect them at 1m depth!


btw. there is not much depth difference the Jeohunter has if iron is off or on
- perhaps 10-15% - and because I found it with 80% sens. iron on for shure I
would have found it at 100% iron off - especially if the coins would have been
spread some more - 15cm/6inches in diameter (but there was no place down).

I've written before my test that we need those shape size etc. stuff but
no one cared and for the moment I won't bury that coins again - especially
as long as there is not more interrest here concerning real rules and not:

"you can do whatever you like with those coins as long as they're at 2feet"


btw. it is not only just the discrimination but also the ground conditions
that have to be considered if the test really would be of scientific value:

In my case there was medium mineralic soil (clay mixed with sand and stones)
which is already a huge difference compared to in air test but much stronger
mineralized soil may lead to a different result.

And creating tests-conditions noone can succeed are ridiculous. What would
you say if I want to test if people can fly just by waving with their arms?

Discriminating iron at a depth test is pretty critical to avoid an other word
because with such a rule you will discriminate most depth detectors alias
not disc.able PIs that would be possible to operate at such depths at all.

The idea behind of a heavy trashed site may be OK but what if nearby rusty
iron scrap will mask the very weak cache signal? You won't find it at all.

[joejoe]

Being a schmo and not technical guru like everyone else here, I will speak for some of the common man.
I think many looking for a detector want to know if these detectors that are currently available CAN detect something that could be of value at a two foot depth. That's why I'm having a difficult time because so far there isn't much that apparently can.
No VLF? With or without dicr? Pulse, yes, but which one and with which coil? The tdi with geo's mega coil, but that is not easily purchased at joes detection shop.
According to funfinder you can purchase a jeo unit that can, and knowing that it can must make one feel good. And find voids, which is just a bonus. Where is the tf-900? I hear they don't produce it anymore. Who knows? Maybe smugglers lost their sacks and I need the void finder . But that is something else.
As Q says, a pi with a large coil can cover a large area quickly. And it also can be hooked up to a data logger if I have that correct.
Just knowing that these two different units can detect down two feet is important to those that may have that as their target zone. I figure in the area that I am in, if something registers down that deep, it's worth digging. If it could tell if it is gold, great, but I wouldn't expect miracles. I just want a reasonable depth with comfort.

[Qiaozhi]

I've written before my test that we need those shape size etc. stuff but no one cared and for the moment I won't bury that coins again - especially
as long as there is not more interrest here concerning real rules and not:

"you can do whatever you like with those coins as long as they're at 2feet"

I'm not sure why you're still confused about the shape of the cache. Have a look at the test on Gary's website -> http://www.garysdetecting.co.uk/hoard_test.htm
It was placed in pocket B, and is clearly arranged in a small heap, not spread out over the ground. I believe that Carl put his cache in a round plastic container, if I remember correctly.

[kt315]

I'm not sure why you're still confused about the shape of the cache. Have a look at the test on Gary's website -> http://www.garysdetecting.co.uk/hoard_test.htm
It was placed in pocket B, and is clearly arranged in a small heap, not spread out over the ground. I believe that Carl put his cache in a round plastic container, if I remember correctly.

do you write whom for? these people rate the forum like a place for adwertizing. no usefull info there and not to be from them. you can write about the container is plastic or not, but it is not role for the people. jeohunter will find the cache in any one either it is round or square, metal or not - you have only to believe there is the God.

yours

[Funfinder]

Hey kt315,

Jeohunter is real non motion that's why it is so sensitive and you don't have to believe
in any gods! You also don't have to bring blood sacrifice first to find treasure - we don't
live in middle America 500 years ago or have druids like the ancient kelts in Europe!
But it's very nice for us treasure hunters they gave all those gold into rivers, graves
and lakes as gift to their "gods" so we can get real rich! Thank you dear gods!

Jeohunter lithium-ion battery is 4000mA at 14,8V and this has a good reason why!

And you kt315 with your unprofessional Jeohunter tests years ago are one reason
why people here are manipulated (=brainwashed) into thinking it won't really work.



Hi joejoe,

I have to say that it's really great how you are wanna find directly a very good detector.
In my case 1,5 years ago this was almost the same strategy - didn't bought a new MD
for a very long time and checked out high and low what would be the best.
Well and you know I'm really happy with my decision.

You are looking for not expensive or even do it yourself pulse induction because you
think those may have best depth penetration - that's correct but at your heavy
mineralized volcanic islands you have to be an expert to distinct cache and
even stronger mineralized rocks or cavity with those Pulse Induction.

If you are looking for cache and if you are hunting all alone 1m frame is not of use
for you unless you built some vehicle. So you need something with half meter coil.

btw. that cache test is NOT the final depth. It just represents the depth if a
special amount of metal spread over just 10-15cm diameter (4-6inches) is there.

You can find a treasure chest with heavy iron on it etc. much deeper!
The Jeohunter detects an usual homeworker-alucase at 2m in air and
undergrund perhaps at 1,5m (5-6feet) - haven't buried it yet that deep.

joejoe for me it seems you are either very low of funds (monetas) or you don't
wanna take any risks. So why you don't get that cheapo chinese MD5008 or
5010 for 250 dollars somewhere and be happy? Because you don't trust it?
Well, give it a try if you don't have 1000 Euro for PI with 50cm coil or more
for Jeohunter - it's better than nothing! With homebrew PI or pre-built PCBs
you won't have good success. You have to built large coil which is complicated,
you need pretty complex coil tuning and much more skills until you may have
a good working and stable PI - if such PI really works good there...

Successful hunting for gold does cost alot of silver and much work!

However finding precious information can give or save you alot money -
perhaps you should check out some treasure-map, first!
You also can go to an oversea-journey to a MD-shop and test them directly.
But you will need many hotrocks or bricks there to simulate the volcanic soil.

[WM6]

And you kt315 with your unprofessional Jeohunter tests years ago are one reason
why people here are manipulated (=brainwashed) into thinking it won't really work.

.

I think that kt315 cannot be more brainwashing than reality. And reality say that Jeohunter is only overpriced "hi-tech" crap-toy. Literally nonmotion cannonball detector. 50x cheaper SurfiPI is more useful for prospecting than those expensive Jeocreature.

[Funfinder]

WM6
Stop it making jokes here if you don't have good arguments for your provocating claims!

[WM6]

WM6
Stop it making jokes here if you don't have good arguments for your provocating claims!

You gave me enough good argumets that you can put a question now; who (except you) are willing to buy such impractical creation.

Here citation of your own arguments given at first page of this topic (and not to mention arguments given by others):

- Price: ca. 3300 Euros (4500 Dollars) - that's alot money compared with relatively good Metaldetectors you can get already for 200 Dollars

- Lith.Ion. Batt Life just 3!?-5h (but there's a connector cable so evtl. you can built and attach your own akku pak)

- perhaps not capable of displaying the real shape of an
object - but i have to test this first - perhaps somebody here knows more about this topic

- Soundlevel 1 of 10 still a little bit too loud

- handbook is written in not always the best understandable english

- on high sensitivity sometimes recognises even missing of human body as cavity - if you go a bit away from detector (but easy manual adjustable)

- no discrimination adjustment on every level you like at the moment (just iron or not iron - at least i haven't found that adjustment yet)

- no USB or RS232 connection for data-transfer or easy firmware update by PC


Yeah - versus is cool - I write long pro-contra lists if i have important decisions to make!

- shows Battery empty (going down to 1 red line) already after 2h but goes on working without problems for additional 2,5 hours (sensitivity is slowly decreasing in the last 1,5 hours); perhaps it's not an original accu i've got there.

- Colour-LCD Display not good to view from angle positions (from "above")

- needed to change search-arms more often for resting the formerly one

- not that easy to transport or take with you in backpack all the time

- not so easy to pinpoint as with Fisher 1266-X

- Accu plug had a very little loose-contact - I tought already the detector is gone - but for luck i found the culprit.

- that 30x45cm coil is a little too big for woods or areas with alot stones and other stuff on the floor

- valuable percentage display has more to do with size and weight of object instead of gold-/ silver-alloy-ratio

- if you want to correct GEB you need first to switch on/off or chance sensitivity level

- key-assignment a little bit confusing in the first time: Pressing key gets you into special mode, same key pressing again also gets you out of that mode (Ground, Setup, Depth, Record or delete Data & Scan results)

- charging of fully depleted accu needs 10 hours (but I have to prove this first)

- the deeper a detector goes, the more work you could have or get... - almost comparable with oldtimer cars.

- Accu lasts just 4h because perhaps of low temperature (at around ~ plus 5° Celsius Value)

- in the manual is written you can adjust Ground (GEB) all the time, but because of complexity I missed this point yet. But i will check this soon.

- - It does not use 9V Blocks! Shure, they're lighter-weight - but I don't like them very much. Empty in no time, especially the 7,2 Accus, and very expensive. That wasn't the best idea of new Fisher Company changing to those "bad blocks". Weight-Comfort ok, but not on cost of money-waste and low power batteries. That's why I love my old 1266-X - it runs with 8 Mignon Batteries or even eight 1,2 Volt Accus!

- - with iron-detection switched on it shows nail 10cm if holded vertically near coil correct as iron - but horizontally as cavity

- no ultra-bright on-off switchable LED-Lights directly integrated into the search-coil (but there's no detector using coils with this practical feature yet, pinpointers only!)

- no manual in german language - but I'll write this soon!

- Pinpointing:
Because of the large coil pinpointing is more complex, but also possible.

- But first we need a better coil!

- - Seem's the Jeohunter has with 35x45cm coil the same depth as Nokta has with "little" 25x35cm coil.

- The Jeohunter in Europe now costs 3200 Euro. Shure, this is alot money compared to that "little bit of electronic" but don't forget the development-costs and that this is no mass-production from China.

- Accu Plug 1mm too large for accu-holder-cover (could destroy plug if plastic-gum is not cut off a little bit)

- I found this six pound 9,2cm / 3,x'' diam. french cannonball from the year 1809 at 31. March 2010 because the Jeohunter gave me the attention to this fund!
Usually I search at Disc-Level: "Gold, small Rings, pulltabs". But because the Jeohunter ignores the most small stuff you can concentrate on large deep targets much better - as you can see at the original pix with success.

- Shure, if you test the Jeohunter with coins or small objects, other detectors will get better results and the handling is easier, but if you want or have the chance to find deep and precious things, you really should give the Jeohunter a try.

[joejoe]

This thread is getting very interesting. Thanks to everyone for their input, one side AND the other.

[ishtar hunter]

another pro:
on real good GEB it detected yesterday my selffound Emerald-on a Silver-Ring from ca. 45-50cm! And this with alot metal stuff 1-2 meters around the detector.

(btw. I would have prefered if the smaller search-coil (25x35cm) would be standard or already within the package. It's in the new JeoRadar Package of Turkey and will find smaller objects even better.)

The best solution of course would be a little color LCD Display directly integrated into the Detector-Holder-Unit. Would be more convenient if the minimizing of computer-parts and high-power Accus can make it possible sometimes.

At least the Jeohunters Solution is better than taking a Laptop to searching all the time - but thats just imho.


@ WM6
This has nothing to do with promotion but with personal view of things. Take the pro and con's and give them your own values. Take it or leave it as always in life, but respect my autentic description of personal views and most as possible objective information.

I've even written to the reseller that I'm just 85% satisfied - but that would be 90% if the Accus would last longer and the price is lower. But look at some "computerized"-magnetometers - they can cost you 15.000 Dollars! Thats all because new technology Metal-Detectors aren't mass-production and often expensive engineering-projects - if we want to ignore the chinese ones, and I'm shure we will.


@ michael
Before I bought the Jeohunter I did read all the posts about the Nokta here and everywhere! One big advantage is grafical display of cavity - at least for me.

Nokta has better grafics and claims it goes deeper but the price is absolutly not acceptable. Jeohunter is big concurrence of Nokta in Turkey and perhaps that's the reason why even Kellyco doesn't (is allowed to) sell it.


@ All:
Yesterday I did translate the sometimes hard understoudable Jeohunter's english-manual into german but with much clearer descriptions. It's in Richtextformat (rtf) and if you want to take a look at it or like to translate it with google into your home-language, please drop me a message.

Hi
I have a geo hunter and I detect by geohunter a void an area (80*60)at a dept of 2.50 cm