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Offline undergroundTopic starter
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« on: October 26, 2009, 08:23:01 am »
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HI EVERYBODY.CAN ANYBODY TELL ME WHAT IS THIS TREKK GPR AND DID ANYBODY USE?
LOOKS INTERESTING FROM VIDEO.UNFORTUNATELY I DO NOT UNDERSTAND THE LANGUAGE.HERE IS THE LINK:

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http://www.farmet.net/index_en.htm


DO THESE ITEMS WORK ON DESERT OR HIGH MINERALISED SOIL PROPERLY OR NOT?

B.R: Khaled

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Offline modaljar
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« Reply #1 on: October 26, 2009, 04:02:15 pm »
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Hi Khaled,
             I checked the site and there is a big joke there :
                    " first test on air: 40x40cm sized metal object detected from 20m distance away."
 Just runaway and don't look back.



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Offline ronin
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« Reply #2 on: October 26, 2009, 04:29:12 pm »
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Actually GPRs can detect on air or on ice up to unbeliavable depths(hundreds of meters). So it is possible to detect from this distance on air. If there is no prevention front of the antenna coil this 20m distance might be pretty real.
But the problem is to penetrate in ground. If there is clay or wet soil that time difficulties may occur and depth might be shallow.
I advice to you guyz to read the theory of GPRs and possibilities besides difficulties.

This unit is from my country and did not have any chance to see until now. I purchased from this company some Pulse induction metal detectors and they work pretty great but cannot say how this GPR works. I didn't see yet.. Have no clue..

Only i can translate that they are on 1 tumulus and trying to find the anomalies to reach the main room of tumulus and also the tunnel.
As they say and show (not clear) they found laterelly around 7m under the ground first anomaly which they assume it is the retaining wall of the grave(might be tunnel). Then after 2m (5m laterelly) the main room. And from up of the tumulus from 5.2m under the ground, the top of the room.
Shortly i summerized but do not know the real result yet.. Must see..

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Offline modaljar
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« Reply #3 on: October 26, 2009, 10:48:52 pm »
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My friend here is the link for the man who made this GPR with real information about real depths.
It's not suprised me that it's also half price.

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http://m12.hit.bg/gpr_eng.html


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Offline ronin
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« Reply #4 on: October 27, 2009, 02:10:26 am »
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I know this Bulgarian device very well.It is quite simple and software is so primitive.Can you see the resolution of the device there?
I do not want to defense this Trekk Gpr because i didn't see it yet. So i can only say the general theory of GPRs. And frankly, i do not think GPRs are suitable for treasure hunting owing to having a lot of limitations. I am  PI detector user and do not need any other device. I m not an archeolog to use these GPR kinds.
Here are the depths and enough info about GPRs:

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http://www.georentals.co.uk/gprsee.htm


So, as you can see, on air and in ice the depths are incredible. Because there is no barrier front.

Regards,
Quote:Posted by modaljar
My friend here is the link for the man who made this GPR with real information about real depths.
It's not suprised me that it's also half price.

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http://m12.hit.bg/gpr_eng.html



Aha you mean this is the same device of Bulgarian one??
My friend, i downloaded the software, software is totally different. Bulgarian doesnt have any realtime recording beside the resolution is so bad.Trekk one is totally different language and different features. You can download the user's manual of BG one and also Trekk demo software to compare with each other.As seen on Trekk software you can see the signal strenght from A SCAN and also as mentioned the signal changings. There is no such feature of Bulgarian one as we can see.Bulgarian works under DOS, this one works under Windows, this is a clue even the software is totally different.

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Offline modaljar
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« Reply #5 on: October 27, 2009, 02:30:45 am »
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Nobody buys GPR to use it on air and no respectable manufactures even mention this.If farmet gpr is good, they can prove it and report
every detail as this individual Bulgarian engineer did.As you can see in his site, he mentioned the limitions of his deveice first.He shows resonable reports with photoes and videos.He never claims his device can detect 10m on air because this fact proves this tools has nothing to do underground just to play with on air.
Pl is great but the problem you have to dig each peep to be sure you didn't miss anything or you can use this very expensive tool from
DTI DTI-PULS-ANTARES which offers realtime pictures while scanning the area and a complete 3D graphic picture of the ground after scanning the area. Laptop is no necessary . Metal discrimation is in colour as it is with the SIRIUS. Furthermore it has a 3D graphic picture. With its Microsoft operating system it can simulate all measurements directly. The 680x420 Pixel Sunlight Display with Touchpanel allow a brillant picture on display even sunlight.

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http://www.detector-trade.de/English/DTI-Puls.htm


I am not againest farmet , they sell good detectors like Ground Pioneer 4500, stinger2 even the DTI mentioned above and many others.

Thanks for the information and useful link

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« Reply #6 on: October 27, 2009, 03:17:33 am »
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Dear Modaljar, you are absolutly right with your Trekk GPR comments. Up to me, just assuming, i think they wanted to say that even 600Mhz antenna which they designed, without any barrier(if everything is good, ceteris paribus) reaches up to 20m on air for 40x40cm object. Yes for sure this is useless info, because we will search under the ground. But in their tumulus video they are finding some walls and grave ceiling etc from 5m, 2m, 7m depths. Must see the real result indeed. If they show on videos once more... Will wait for that...
Add, I m using one of their discriminating pi metal detectors right now and it is really very good. But as i mentioned before i really do not think that GPRs are useful for coin, relic and treasure hunters.

Regards,

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