Jeohunter - Visual Ground Scanner

[Funfinder]

Hi indio yaqui!

The Jeohunter really is a professional detector and I fully recommend it. Mine still works fine after 2 years of intense usage, even at winter time and heavy rain.


For steep mountain-regions the standard coil is too heavy but I will find a way to make it more lightweight.

One of the big advances is the immunity against strong powerline fields. Today - because of very steep region - I've been out with my lightweight-modified Garrett GTI1500 (in original this MD also is too heavy - especially together with Detech 40cm coil) but I had to adjust the sensitivity below 50%! That beeping-concert nearly drove me crazy and alot MDs react on powerlines like hell!

I wonder what those MD producers and circuit developers are thinking? Where powerlines are, there are people too, but no metal?

indio yaqui, about the depth:

For 5-6 feet the find needs to be around 1,5 feet in diameter.
And for this depth I really would recommend the 1m coil (see picture above). You need a second person for this coil. If this is not possible for you, I recommend the standard version with the more than 1ft large medium size coil.


However it also depends on soil, how slow you wanna search and experience how deep you will be able to detect!


As example if I run around in the woods with 80% sensitivity and ground balance -50 I can detect 3inch cannonballs at around a half meter. But this is just some kind of highspeed compromise. If I would search slowly at 90% and perfekt groundbalance I could find it at around 2 feet.

Lucky treasurehunting!

[fordranger]

Jeohunter

Hi Funfinder,
What do you think if Jeohunter is associated/work together with data logger. Do you think I can achieved more depths ????

Cheers,
Fordranger

[Funfinder]

Hello fordranger,

most depth you can reach with slow search @ 90-100% sensitivity and iron on while searching very close to the ground and wearing/holding no other large metal objects. Of course most depth you will get with the 1m coil on larger objects.

Data logging in that case would be useless because there is no ground-mapping and you either get a detection signal or not. The Jeohunter has already a short data-logging line that captures the signal-curves as a graph.

The Jeohunter really is the best possible deep search compromise - especially for heavy mineralized soil - at this price-level you can get. As example the Nexus Ultimate (costs around 3500 Euros) has the electronic unit directly at the holder which makes the searching weight much more heavy. And it has no 1 meter coil or LCD display. And the Jeohunter still can find small buttons or bottle caps and coins a two-box or 1m PI frame never would detect.

If I have time I'll try to develop an eliptical 2ft DD coil. This would be another huge depth gain compared to the medium coil and perfect for single person use.

[Qiaozhi]

As example the Nexus Ultimate (costs around 3500 Euros) has the electronic unit directly at the holder which makes the searching weight much more heavy.

Actually, the Nexus Ultima only weighs 2.7kg with the 20" search coil, whereas the Jeohunter 360x440 D type (14"x17") general coil [on its own] weighs 2.6kg; and that's without the heavy control box. Goodness knows how much that weighs. Makrodetector dare not list it in the technical specifications. The Deep Search 600x1000 search coil (24"x39") weighs in at a whopping 8.45kg !!! And ... after lugging the whole extremely heavy contrivance up the side of a mountain ... you only get 4 hours of battery life!

[Funfinder]

Jeohunter Weight grams
-------------------------------------
Coil: 1450
Holder with cable: 1350
Detector with lipo battery 4000mAh and bag: 2100
------------------------
4900 Gramm


OK, so the weight for the arms are nearly the same. In fact both are too heavy. The 2kg around the neck doesn't count - I know this from many times of personal experience.

One battery pack lasts 6hours and with LED light off Mod even 9 hours.
Plenty of power for 1 day of search and digging.

The coil shape of the Jeohunter is more practical as the OO from the Nexus Ultimate.

Qiaozhi, would be very interresting to compare the depth of both. I guess there is not much difference (Jeohunter with standard coil).

Those are both very very good MDs, no question, but the weight of both of them is an issue. Shure, it is no problem if someone just searches for 3hours a day and the half of this time is needed for digging work. But for longer sessions and steep mountain-regions the coil really needs a weight minimum like this one:

Detech Excelerator 40cm
---------------------------
400gr Holder
850gr Coil

That's the half and perfect for heavy terrain and searching all day long! The Jeohunter has the problem that the holder is made out of massive PVC or something like this (a good idea if not so heavy) and the coil contains alot amount of copper-wire while MDs like the Nexus Ultimate (and many more or almost all! ) have attached the display and electronic directly at the holder.

btw. the weight grows expotential the longer the coil-holder is. But the more radius the more area-covering! If someone sweeps the coil directly in front of his feets even a 2,5kg coil is lightweight, but not if you search 1m infront with 3m distance-sweeps - like I do. Turning in circles completly cancels that weight but not everywhere are flat fields etc.


For further improvements we really need to know the minimum amount of windings and wire-strenght for still enough depth penetration power / inductivity. Perhaps we can achieve this by higher voltage or more sensitive electronical circuits which have to be immune against all kind of other EM-interference.

Absolute maximum should be 1,5 kg for large coil incl. holder.

[WM6]

Turning in circles completly cancels that weight but not everywhere are flat fields etc.

"Turning in circles" new Funfinder Olympia discipline:

[Govind]

> Hi Funfinder, Thanks for you reply, by the way did you experiment on 1 meter coil.
thanks
G

Thank YOU!

Well, I did experiment already, I got some special technical info and made some indoor tests so far but this is no problem because of the detectors ability to reset value state setting and totally immune against even very close electricity or EM radiating devices.

The limit of this 1m coil are objects around 3-5cm in diameter (canadian silver dollar) from around 30cm distance.

But the most powerful depth will start with objects that have 10cm in diameter and above.

That coil has 2 holders so usually it is for 2 persons. In wintertime I will use some kind of very old snowboard prototype completly out of plastic and drag the coil on my own over flat fields.

Govind - this coil is very powerful and weights around 8kg. Because of the Jeohunters Non-Motion VLF close to the limit sensitivity you will get much better results than with 1m PI frame, especially if ground is mineralized. You even can find stronger mineralized stones or cavity within mineralized soil!

Have you watched already the new Jeohunter manual clips on youtube? Do you have some strong arm-muscles? If yes, you will see that it is not that complicated to use and it has a really good depth distance detection (how deep is the stuff buried).

If you really have around 7000 dollars for treasure hunting investment and you want to do this for a longer time, you should directly get for such a good detector. At least you really should buy a detector with a real large coil that has 35cm / 1 foot diameter minimum, because the regions you can search are much larger than a small coil is useful for. You know, this results into a special motivation-gain-ratio:

If you need a half day for 10 squaremeters with a little coil you may find just a few objects and this will frustrate you. But if you "whirlwind" around with a half meter coil over fields and woods and search through 500-1000 sq.meters like I do within 6-7 hours for shure you will have finds without end!

btw. if you set the sensitivity of the Jeohunter to 60% you wouldn't need any Groundbalance at all (just leave it at the zero value) and still will find alot stuff - but of course this is just for the beginning to get used with it, in later time the more sensitivity and better groundbalance you use, the more finds and depth you will get.


A week ago I found a fabulous rare special cannon-ball and since then I was hunting every day, even 2hours at night with dimmed lamp on my head. You really have an experienced guy here with me, I'm not telling you any nice stories but how it works in reality.


I hope you will get all the needed information so you can take the best possible personal opportunities concerning treasure hunting.

Take care and please tell us here how you decide and your first steps into treasure-hunting.

Hi Funfinder,
Thanks for your detailed message. I am still in research phase only, not yet decided. I have time till this summer to decide.

Thanks
G

[Funfinder]

@ Qiaozhi
To make our little comparision between Jeohunter and Nexus Ultimate more complete another two points:

Afaik different kind of coils are directly changeable at the Nexus, even very small ones. This is good. But are those already included in the 3500 Euro package or just one coil? And is this 20inch oo coil the largest available one?

But also very important: Do you know how immune is the Nexus Ultimate against electro-smog, power- and high-voltage lines and temperature-changes?


@ WM6
You should moderate a funny Latenight-Show!
Nice picture that hits the truth.
But I use this whirlwind-method with the GTI1500 and 40cm Excelerator coil, too.
Because it's the most efficent way or better: the only way! to search very large areas. The Jeohunters 1m coil would be too heavy but a 2kg coil that has a size of 2feet with usual holder would be perfect, because that way I could move faster forward even more.
And yeah, meanwhile I got together a pretty cannonball collection.


@ Govind
Very well, and perhaps you find the chance to try such detectors you're interested in first.

[Qiaozhi]

Afaik different kind of coils are directly changeable at the Nexus, even very small ones. This is good. But are those already included in the 3500 Euro package or just one coil? And is this 20inch oo coil the largest available one?

But also very important: Do you know how immune is the Nexus Ultimate against electro-smog, power- and high-voltage lines and temperature-changes?

I'm not certain whether there is a second coil supplied as standard with the Ultima. It's probably an optional extra.

Send Nexus an email with your second question.

[Funfinder]

Thx Qiaozhi for the info.

Well, the Nexus Ultima 20'' coil in fact is 35'' broad (hard to use in woods etc.) and has a distance of 15'' from coilcenter to coilcenter so it's depth is no wonder but I guess under real search conditions it will only find 1'' coins and larger stuff (Jeohunter still finds 0,5'' small things).


Another drawback of the Ultima seems to be cavity detection:
It may be possible somehow with the uv meter if the disc is set to allmetal and if the meter moves to the left side over a cavity or mineralic stone. Another special question for email.


And the weight with 2,7kg incl. 20'' coil is not the whole truth:

The info here is wrong:

http://www.nexusdetectors.com/ultima5f.html

Nexus Ultima weighs 2.7 kg with the 20" search coil.

Or in that case they used the weight without batteries.


Because the user manual pdf writes:

http://www.nexusdetectors.com/files/...usermanual.pdf
Weight (with dual 9" coil): 2.7 kg (with 8AA batteries included)

The 9'' coils weight is 700grams while the 20'' coil weights 1,5kg.

This makes 2kg without coil which is already too heavy and inclusive 20'' (which is 35'' broad) coil you have to move 3,5kg incl. batteries around - and not too close in front of your feets...


That's the problem with people, almost everyone tries to trick around and only speaks or writes about the positive points (doesn't tell you the whole truth!) while in reality some of the negative factors have so much weight, that the positive stuff gets completly neutralized!

[Funfinder]

Got the missing Nexus Ultima 5F Info:

- not immune against electrosmog but smaller coils are less affected
- no cavity detection but some mineralic stones are detectable
- 20'' coil finds medium size coins buried over 10cm below surface
- the Ultima weights 2.7kg incl. 20'' coil and batteries, coil is stable

[Qiaozhi]

- 20'' coil finds medium size coins buried over 10cm below surface

You must have something wrong here, as 10cm is only about 4".

On the Nexus website they state:

-------------------------------------------------------------------------------------------------------------
The minimum requirements for depth penetration for all Nexus metal
detectors utilizing at least dual 6" search coil are:

14" (38cm) under compact normal soil in real conditions for a large coin with diameter 30mm.
10" (36cm) under compact normal soil in real conditions for a small silver coin with diameter 10mm
-------------------------------------------------------------------------------------------------------------

[Funfinder]

Qiaozhi,

that's good news but I guess it hardly depends on the coils size.


I've had my doubts the huge 20'' coil will find a small coin buried 4'' deep but got the info it's no problem, so it even may get the double of that or something.

However - in-air-tests and outside is a huge difference. The most sensitive region of coils is just 1/3 directly at the center but hunting with overlapping that much is highly uncommon with such large coils. 1/3 = only 6 inch which is a small area to hit the coin.

Too bad it's not listed here:
http://www.metalldetektortest.eu/belgientest.html

That's an independ test of alot different brands - just click on the name at the left side to compare the depth results.

[THer1993]

Comparison Test of Jeohunter 3D Against Minelab, XP, Garrett and Tesoro Detectors

Yesterday, November 28 2011, I conducted a test with the 31.5cm x 21.3cm (12.4 inches x 8.4 inches) search coil (LED system) - the smallest search coil (for coins and other small things) of three Jeohunter's coils that come in a package.

The 16th century village site was chosen for the test site; the black cultural layer going down more than 80 cm at the "house spots".

A prospecting pit 2m x 1m x 1.8m was dug. Various coins (ranging from 16th century silver hammereds to modern coins) were attached to plexiglass strips which were inserted into the pit's wall at measured depths. Thus the effect of mineralization was preserved. However, the halo effect wasn't present.
Since the depth values for various coin sizes in relation to search coils, that are printed in Jeohunter's "User ManuEl" (as printed on a booklet cover) - "Instruction Manual"(I'm laughing my brains out through tears when reading this piece of incomprehensible babble), were "gathered by trying new metals" (in English: ...were "recorded during detection of freshly buried metallic objects"), the test conditions were similar.

Prior to the test, the ground effect was sure balanced (my right arm almost fell off after I lifted this SMALL coil a zillion times! Last time I experienced something like this was in 1993 when I tried to ground balance an archaic and cumbersome Garrett detector of 1971) - no LEDs on both left and right sides on a joystick were lit up. SENSITIVITY was set up at 90%. 100% sensitivity makes the Joehunter 3D yell at you about big cavities under your feet! (Too bad they don't contain treasure chests inside!)

The following metal detectors were tested under the same conditions along with Joehunter 3D:
2) Minelab E-Trac (2009) with a 20.3cm (8 inches) round search coil in Discrimination Mode (excluding only small iron nails) and SENSITIVITY at 75%
3) XP GoldMaxx Power II (2010) with a 22.5cm (8.85 inches) round search coil and SENSITIVITY at 90%
4) Garrett GTI 2500 (2010) with a 24cm (9.5 inches) round search coil in All Metal Mode with SENSITIVITY at 80%
5) Tesoro Cortes (1999) with a 22.8cm x 20.3cm (9" x 8") elliptical search coil, SENSITIVITY at 90%, and DISCRIMINATION setting between IRON and FOIL

Instead of listing the testing results for all coins, I'm just giving you the results (the maximum detectable depth) of detecting a 25-cent US coin (diameter 24.3mm, composition: .750 copper, .250 nickel):
1) Joehunter 3D Dual System - ONLY 15cm instead of 30cm (for coins of 24.3mm diameter) as claimed in the Instruction Manual...
2) Minelab E-Trac - at 28cm depth.
3) XP GoldMaxx Power II - at 24cm depth.
4) Garrett GTI 2500 - at 20cm depth.
5) Tesoro Cortes - at 22cm depth.

Just for fun, I used a 16th century small cannonball (11-12cm in diameter) for a relic detection test. The Jeohunter 3D with its smallest search coil (LED system) could detect the cannonball only at 50cm depth instead of 70cm (for 10cm x 10cm objects) as listed in the manual. ((( This cannonball was found by Garrett GTI 2500 at a larger depth at this same site earlier. I didn't test other detectors with a cannonball as the evening November temperature went down fast and my buddies and I headed home.

More testing with different sensitivity settings and under different conditions will be conducted tomorrow and in the future (a full illustrated report will be published on my web page). But so far, Jeohunter's small search coil has been a disappointment. "Manuel the looser"...

As for the best deepseeking detectors, I have found out from my 18-year experience with them, the Pulse Star 2 Pro has been remaining the top machine. Lorenz LP5 is another capable detector. Everything else is useless especially at the "searched-out" and highly mineralized sites. Just keep in mind that if a deepseeker is not PI, it's a deepseeker for a felo-de-se.

[der_fisherman]

Question to Mr

Dear THer1993 ,

You wrote:-
Just keep in mind that if a deepseeker is not PI, it's a deepseeker for a felo-de-se.
Can you explain what you meant, just for me please?
thanks
Andy