I'm looking for recommendations on metal detectors that reliably detect deeply buried objects, especially gold coin caches. I'm looking for coin caches anywhere from fist size to briefcase size at depths between 3 and 10 feet. Have any of you had success detecting any sort of metal objects at these depths? What detector would you recommend?
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How to detect large metal objects up to 10 ft deep
- Thread starter jaromf
- Start date
GRAY GHOST
New member
n/t
I would prefer the two box unit.
But I hope you like to dig.
Cable locaters are varied in type and expense.
Some tramsmit a signal through a conductor. Those
won't work. Not sure which ones would work well for
finding a cash.
May be some one els knows.
I've used both types as a surveyor locating utilities.
Did not ever use them for treasure hunting.
That's my thoughts on it.
HH,
But I hope you like to dig.
Cable locaters are varied in type and expense.
Some tramsmit a signal through a conductor. Those
won't work. Not sure which ones would work well for
finding a cash.
May be some one els knows.
I've used both types as a surveyor locating utilities.
Did not ever use them for treasure hunting.
That's my thoughts on it.
HH,
JoanInCreek
New member
Tabdog, can you tell me what a two box unit is? Ten feet is pretty darn deep but he must have a plan, know where to dig. I would be happy to get down 12-18 inches in areas I am sure I will find something.
Hay Joan,
Two box machines, as the name implies, are made of two coils, one in front placed horizontal
and the second is in the back placed vertical. Horizontal In the front is a receiver loop, and
vertical in the back is the transmitter. In some units like Gemini III , loops may be located
inside the electronics box, in some others, like as in TF-900 loops are outside the control box.
These detectors work based on the concept of metallic objects blocking the radio wave generated
by the loop in the back and received by the loop in front.
Some examples of two-box machines:
1. TF 900 by discovery
2. Garrett Grand Master Hunter CX plus, If "Depth Multiplier" is added
3. Garrett GTI 2500 If "Depth Multiplier Eagle Eye" , is added
4. Fisher Gemini III which has some industrial use
Unlike the pulse induction types that can only be used in very flat areas (Because the big loop
should be positioned exactly parallel to the surface and kept in constant distance from it), the
two box machines can be used in hilly areas or flat areas (both surfaces), because two-box
machines are not as motion-sensitive as pulse induction units are.
When using a two box machine, the target size must be at least as big as a soda can. They
cannot detect a single coin. It must be a jar full of coins.
Hope that helps,
Two box machines, as the name implies, are made of two coils, one in front placed horizontal
and the second is in the back placed vertical. Horizontal In the front is a receiver loop, and
vertical in the back is the transmitter. In some units like Gemini III , loops may be located
inside the electronics box, in some others, like as in TF-900 loops are outside the control box.
These detectors work based on the concept of metallic objects blocking the radio wave generated
by the loop in the back and received by the loop in front.
Some examples of two-box machines:
1. TF 900 by discovery
2. Garrett Grand Master Hunter CX plus, If "Depth Multiplier" is added
3. Garrett GTI 2500 If "Depth Multiplier Eagle Eye" , is added
4. Fisher Gemini III which has some industrial use
Unlike the pulse induction types that can only be used in very flat areas (Because the big loop
should be positioned exactly parallel to the surface and kept in constant distance from it), the
two box machines can be used in hilly areas or flat areas (both surfaces), because two-box
machines are not as motion-sensitive as pulse induction units are.
When using a two box machine, the target size must be at least as big as a soda can. They
cannot detect a single coin. It must be a jar full of coins.
Hope that helps,
I believe there is also the two box White's tm-808? which is out of production, but still around.
A PI with those meteorite detecting coils might be a good thing to look into.
A proton magnetometer could work?
GPR is expensive...
Possibility exists that deeper machines for cache - sized targets are built and used in eastern europe where there seems to be a lot of interest in such troves.
HH
A PI with those meteorite detecting coils might be a good thing to look into.
A proton magnetometer could work?
GPR is expensive...
Possibility exists that deeper machines for cache - sized targets are built and used in eastern europe where there seems to be a lot of interest in such troves.
HH
Now I'm not specifically recomending the Deepers but their site does have a great deal of information and does point out the limited depth and many drawbacks of all the U.S. machines.
There's two pages on the site re two box machines. One provides the sort of information you require.
Magnometers are straight out the window as you don't know if a hoard is in a metal box or not.
http://www.metaldetection.net/english/index.htm
There's two pages on the site re two box machines. One provides the sort of information you require.
Magnometers are straight out the window as you don't know if a hoard is in a metal box or not.
http://www.metaldetection.net/english/index.htm
Jarompf, the Fisher Gemini III will possibly detect at 10 feet, but it will
totally depend on the size of the metal container the Gold might be in.
I've used a Gemini II years ago and detected a flattened 5 gal. steel
can at 6 feet deep in a barnyard, but 10 feet would be very "iffy". Plus,
you're talking backhoe work, since that's WAY too deep for hand
shovels and you might even discover water or oil..!!
Whatever you do, Good Luck!
..W
totally depend on the size of the metal container the Gold might be in.
I've used a Gemini II years ago and detected a flattened 5 gal. steel
can at 6 feet deep in a barnyard, but 10 feet would be very "iffy". Plus,
you're talking backhoe work, since that's WAY too deep for hand
shovels and you might even discover water or oil..!!
Whatever you do, Good Luck!
..W
I sincerely appreciate your input. Especially the the note about P.I. detectors having difficulty in hilly areas. I have some leads on caches in some caves and arroyos down in Mexico. I expect the caches to be around 3 to 6 feet deep, but I figured getting equipment that goes a little deeper than that would promise better luck. After reading various suggestions, I'm still not sure whether to go with a P.I. or a two box detector. Some say that the two box detector is difficult to adjust properly while others say the P.I. is difficult to use in rough terrain. Additional clarification or suggestions would be much appreciated.
Like any kind of detecting experience is everything do you have any that would be the first question. A two-box would seem to be the way to go I have the TM 808 Whites and Gemini 111 Fisher.
Next locating a cache and recovering it are two different issuses, the two-box won't tell you if its 2 feet down or 6 feet just that something is there. Dan
Next locating a cache and recovering it are two different issuses, the two-box won't tell you if its 2 feet down or 6 feet just that something is there. Dan
Its not a thing they put on the deepseekers as depending upon whether your searching for coins at deeper than normal depths, or say a cannon at 10 or 15 feet, you would need a large round coil for the coins (say 15") and for the cannon a square or rectangle coil perhaps 8 X 4 feet. The extreme differences in size (and variation of the size of targets ) mean any attempt at depth reading would be well out.