Treasure Finder 900 Automatic 2 Box HELP !!!

[Sam-BG]

Hello everyone,

I recently purchase the TF 900 Automatic 2 Box trough Kelly Co.
I am located in Bulgaria and here there is extremely heavy mineralization of soil, although I have being out hunting only couple of times I will appreciate if someone who have experience of using TF 900 share some useful information with me.

I have made some tests with silver 300 gr. buried on 1 meter , gold 100gr. buried on 30 sm. and Chrome-cobalt 1 kg. buried in 1 meter.

The TF-900 did give respond to the silver but the other metals were not located .... good think I knew where I put it so could retrieve it after that .
So far I experience that in this type of soil TF-900 responds even to a rock which is something that I can not explain to my self .
Sensitivity very touchy some times can't figure out if the signals I am getting are from mineralization or off a metal even with earphones can't really distinguish the tones , which ones are false or true .
I will greatly appreciate if anyone share some experience with me .

Happy hunting

[Geo]

The only that i can tell is that the 2Box detectors "see" only the surface of a metall, not the metal or the weight. So you need a large surface. 2Box detectors need large surfaces to work ok, they are not good for coins or for small objects. Here at Greece we tell them as "detectors for Boxes"
Regards

[Max]

Hello everyone,

I recently purchase the TF 900 Automatic 2 Box trough Kelly Co.
I am located in Bulgaria and here there is extremely heavy mineralization of soil, although I have being out hunting only couple of times I will appreciate if someone who have experience of using TF 900 share some useful information with me.

I have made some tests with silver 300 gr. buried on 1 meter , gold 100gr. buried on 30 sm. and Chrome-cobalt 1 kg. buried in 1 meter.

The TF-900 did give respond to the silver but the other metals were not located .... good think I knew where I put it so could retrieve it after that .
So far I experience that in this type of soil TF-900 responds even to a rock which is something that I can not explain to my self .
Sensitivity very touchy some times can't figure out if the signals I am getting are from mineralization or off a metal even with earphones can't really distinguish the tones , which ones are false or true .
I will greatly appreciate if anyone share some experience with me .

Happy hunting

Hi,
Geo is right... you need large surface, this is for any MD: more the surface, more the signal that goes back to the detector... that's cause of eddy currents flowing in the target and magnetic flux coupling between TX field and target.

Now about stones etc you're right... many 2boxes suffer from that rocks: the rocks give you signal cause there are inside particular metallic oxides, expecially iron oxides and crystals... that have strong magnetic moment.

When that crystals are dispersed in soil... in fine grains like sand or even smaller you have a random orientation of magnetic moments... the net effect is then canceled, on large numbers due to statistical distribution of orientations... that simply mean any unbalanced magnetic moment tend to be balanced by another of opposite sign.

In some "stones" (better say hot rocks) you have instead that a mix of that crystals was heat-up at hi temperature by e.g. volcanic activity underground or crystals "melt" during such heat-up (actually is not this way... cause it's about "Weiss' domains alignment"... but think it's so)... at that phase the effect of Earth magnetic field is of orienting all magnetic moments to the same direction (like happens with iron powder and a magnet...) then following a very slow cooling of that material you'll notice the alignment remains... so the net effect is not anymore zero.

This is a property also of some old bricks and other fired ceramics: the net magnetic moment is not zero.

In all that cases you'll detect the "hot rock" or "fired brick" cause they exibit explicit, finite, non-zero magnetic moment that's sum of all small Weiss' domains at microscopic level. This is very common with PI detectors, but happens also with some sensitive VLFs or 2boxes or even BFO.

Magnetic properties of soil are actually, most of the times, a composite action of fine soil matrix and bigger stuff like hot-rocks and other macroscopic magnetic compounds like e.g. magnetic nodules (e.g. nickel-cobalt ones).

You cannot avoid detection of magnetic fired stuff with 2boxes or PI: they will always catch fair amount of hi magnetic moments stones or ceramics. Some units, however exibit less sensitivity to that things... usually a good GEB circuitry is the key in reducing their influence on detection.

Kind regards,
Max

[Sam-BG]

Thanks for the explanation !

Hello Geo and Max,

I would like to thank you for your explanation on the topic, it makes sense
that way knowing more about it I won't bother digging everytime I hear a tone increase, it will take a wile as I see it to get along with my TF-900 .
I will keep in touch and wait for others to give me some more tips especialy those of you that have use TF-900

Best regards

[sabre8]

do you still have your 2 box?

[Sam-BG]

Yes I do .