15*15 sheet of copper in 2m depth !! possible??

[payam20]

;D
how much is deep max ????
see this clip. this metal detector have 5m for 1*1 sheet with 1*1 coil ;D
how much ?????


300$
its fully have been maked and diesined by one of my freind ( hey i am not advertizing . you can never buy this becuase its an home mad metaldetector and hunting is illigally in our country .... so he cant send it abroad if you buy)

https://www.transferbigfiles.com/800...9jRGvKwyIYLWw2



and also you can make 6 easy changes to your dp 2 to have this :


https://www.transferbigfiles.com/ff5...NCBB48jB-BJSA2
wants = can
my opinion

and at the end ty "no you cant make such thing " was my answer not all these post ;D

[liudengyuan]

dbp2010

[kt315]

big coil on transporter

[liudengyuan]

my dbp2010 vevr good

[landman]

big coil on transporter

Quite an impressive set up. You have tandem 1 meter coils 3 in a row. Coverage is like 10 ft. wide or more and what of the depth???

[landman]

Good video Payam. It would appear that there seems to be a wall, a limitation with all detectors. That wall is limited to size of object as it pertains to the relative depth. No one seems to be able to do much better than what we see here on an airtest. The 10x20cm object did 125 cm. The 20x30cm around 170 cm. Nothing seems to be able to break these barriers of depth VLF or PI

[landman]

Funfinder, I just got rid of the Goldengate because of a broken arm cup and lack of meaningful depth.

[Funfinder]

Those P.I. R-R-R-R's will become quite unclear and weakened while walking over real ground. 50% loss minimum.
btw. if P.I. works like radar and the coil waits for back-coming EM-pulses why not using some reflector behind it?!


@ landman
Here I found a video with the 1m coil in action - its from the Jeosonar but it has the same depth as the Jeohunter.
http://www.mirrorcreator.com/files/K...ques.flv_links



> Nothing seems to be able to break these barriers of depth VLF or PI

Sensitive gradiometers at low mineralized ground are, but only for ferromagnetic stuff.


Another question is: Do you wanna use the detector as a single person or do you have helping hands
who can assist you while searching with a big coil? For a single person the max. are ca. 50cm coils
or you have something as shown at the Jeohunter thread so you can drag the 1m coil on wheels.

[payam20]

stability was terrible at fist but its good now by using 2 self and a simple circut
frq of them are 150 - 250 hz .their battery usage is 200 - 400 ma .(so they should have a good depth in the ground too )
they are really sensitive to gold.silver and magnetic sttaf .
now its snowing here and i cant record video in real situation but i will do it in the first time i could.
only problem of them is that they use too much battery ;( but there is no need of car battery even motorcycle batterys ;D)
i need sth that go deeper ;D

[Funfinder]

hi payam20

Your detector is interesting but you have real big competition:
https://www.youtube.com/watch?v=ilzB...yK7w10u8VXYdLg

If its not too expensive for you try to use li-ion battery packs - they are much more lightweight than lead-batteries.
With 8 Li-po cells you can get 5000mA at 14,8v with a weight of just ca. 400grams

I would try to use 1A for the coil - the EM-pulse should fire through the soil like a flash!

And if you wanna create something really special deep:
built a coil with the size of 65cm or 2 ft incl. attachable and removable plastic wheels.

Did you ever heard about copper-clad alu wire?
http://en.wikipedia.org/wiki/Copper-clad_aluminium_wire
It's very lightweight but because of the copper its still extremly powerful.
Of course it has to be enameled for coils but with it you can built easy to handle coils.

[liudengyuan]

Most people just ask, they don't communicate with who experience, and improved technology,

[AurumKid]

What is DBP2010? is it the same as XR71 and Delta Pulse? which PI is good and can penetrate deeper?

[payam20]

hi funfinder
ty for your info .
those wires are perfect but expensive ;D i have found some wires that are copper with SILVER on its surfe.( for example if you have 40 cm coil withe 50 round .5 wire then u can use make that coil with 70 round wire .7) it will raise your depth by 10 %.
i have bought some wire but i have 3 exams in 1 month and i have no time for making a coil but i will make it after my exams .

[payam20]

Most people just ask, they don't communicate with who experience, and improved technology,

all of them are same they have same schematics( with 3-4 differences ) but i offer u make xr 71.

[Funfinder]

hi payman20

very good - silver clad copper wire - but too heavy, too expensive and not enough difference I guess.

The main important thing is using a thin enough wire but not too thing so the heat doesn't melts it!
How much current a 0,1mm alu-wire can take until its get real hot?!

A good MD coil should have a coil with at least 100 turns but too many windings are slowing P.I.s down.
That's why P.I. reaches pretty fast the depth- or speed-limits.
here some technical PI info:
http://www.deeptech-bg.com/Understan...I_Detector.htm

btw. So far I haven't opended those 100 cm Jeohunter and DeepHunter DD coils
but if they've used only 100 turns, such a T100 coil contains 600 meters of wire.