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How's the depth on the XT 705 in BAD ground??

PulltabPirate

New member
Hey guys. LONG time whites user (Who recently bought a Fisher F75LTD) & I'm looking for the perfect deep Silver & jewelry machine for me & my Georgia red clay. Don't want to spend ANOTHER grand plus & was wondering about the XT 705 & what coils would be good for me? Any advice on this unit, depth wise & coil wise would be greatly appreciated!! :pulltab: (I know nothing about ML machines by the way!)
 
The 705 is a very capable detector, regardless of the mineralization. The ability to properly adjust the ground phase manually, automatically, by tracking or tracking GB offset allows the user to neutralize the effects of mineralization. With that said, my recommendation would be to equip it with a DD coil as the design characteristics of the DD coils best neutralize the effects of the ground. Knowing that the higher frequency coils are best suited for lower conductive targets, lower frequency coils are best suited for higher conductive targets and larger coils penetrate the ground to greater depths, I'd suggest the 10.5 inch DD at 7.5 kHz. It should provide excellent results on deep silver coins as well as jewelry. Although my soil is considered to be moderately mineralized, the "end result" after ground balancing should not be much different than yours, if you properly set up the detector. In my soil conditions, dimes at 8 - 9 inches and quarters at 11 - 12 inches are well within the reach of the X-TERRA. If you are hunting in areas that target separation is more important than extreme depth, I'd suggest you consider the 6-inch DD at 18.75 kHz. Smaller coil, but I'm confident that it will hit dimes at 6-inches and quarters at 8-inches. What you might consider, since you will be hunting in areas of high mineralization, is to buy the package called the Gold Pack. It comes with the 6 X 10 elliptical DD coil at 18.75 kHz instead of the "standard" stock 9-inch concentric at 7.5 kHz. With the ground conditions you describe, the concentric coil would not likely be effective. No sense buying something you won't use. JMHO

If you take a look at some of the information contained in the FAQFAQ section near the top of this page, or download a FREE copy of my eBook, Understanding the X-TERRA (link to this eBook on Minelab's website is contained in the post at the top of this forum), you will find answers to many of the questions you might have about the X-TERRA. And, don't hesitate to ask more questions on this forum......there are a lot of very well informed X-TERRA users here that will help answer them. Many of us have been using the X-TERRA since its concept. And many of us have used the other detectors you mentioned. HH Randy
 
hi

i love my xterra but having said that
for a grand plus i would suggest an etrac ... a good 2nd hand one
mainly because of the hostile ground
they will go deep when set up correctly
and i think my etrac eats up mineralisation better than my xterra ...ouch ! did i say that ..sorry old faithful xt70
jmho

t59
 
I have to agree with T59, by the time you buy a couple of coils for a 705, you'll have a grand tied up in it. I too really like my XT-70 (for how good it is on both jewelry and gold), but honestly a Safari can go behind an XT-70 and find the older, deeper, on edge coins that the XT missed. Suspect it would be the same when comparing an Etrac to a Safari, at least in areas with a lot of trash, not otherwise... One last comment, notice I said the XT-70, believe the 705 would be very similar to the Safari in overall performance because of the upgrades made to it...
 
I have a 305. It was terrible in our soil with the stock coil, 9in concentric. The 6in 18.75 DD coil got slightly better depth than the stock. Instead of getting the 10 inch DD for the ETerra, I bought an ETrac, and I am still having problems finding coins deeper than 5 inches, but I am still learning the ETrac.

I would recommend the gold pack that Randy speaks of. The concentric coil is basically a waste of money in our soil, it is good for surface finds only, up to 4-5 inches, but mostly 1-2 inches. There are cheaper detectors out there with DD coils by Garrett, that honestly you might be better off with for the money, just a thought.
 
Digger said:
Although my soil is considered to be moderately mineralized, the "end result" after ground balancing should not be much different than yours, if you properly set up the detector. In my soil conditions, dimes at 8 - 9 inches and quarters at 11 - 12 inches are well within the reach of the X-TERRA. If you are hunting in areas that target separation is more important than extreme depth, I'd suggest you consider the 6-inch DD at 18.75 kHz. Smaller coil, but I'm confident that it will hit dimes at 6-inches and quarters at 8-inches. What you might consider, since you will be hunting in areas of high mineralization, is to buy the package called the Gold Pack. It comes with the 6 X 10 elliptical DD coil at 18.75 kHz instead of the "standard" stock 9-inch concentric at 7.5 kHz. With the ground conditions you describe, the concentric coil would not likely be effective. No sense buying something you won't use. JMHO

Everyone always just assumes that their mineralized soil is just about as bad as our red clay around here!

To think that you are going to get a dime (or even suggest it) at 8-9 inches and quarters at 11 - 12 inches in our soil in Alabama, Tennessee, South Carolina, or Georgia is JUST PLAIN IGNORANT even with an ETrac! Sure there are probably some areas of black soil where leaves have decayed and left the surface with less mineralization, but if you find such an area that is a good site let me know, it is surely a rare find! Randy I know you wrote the book, but if you had to detect here you would either move or quit the dam hobby!
 
Ya know, I've been called a lot of things over the years. But I don't recall having ever been called ignorant. Nor would I quit the hobby if I weren't able to detect the red Georgia clay to the same "depth" as I do my moderately mineralized Midwestern soil.

I've met many challenges in life that are far worse than detecting in mineralized soil. (and I'm not just talking about moderating this forum :rage:) Since I don't live in Georgia, I don't consider myself to be an expert about detecting in red Georgia clay. But I have a good friend who has been detecting the area north and west of Savannah, GA for 25 years. In recent years, he's used several X-TERRAs, as well as an E-TRAC, Advantage, Tejon, MXT, F-75 and T2. He has told me about finding coins and buttons at or near the depths I described, using several of those detectors. Even his X-705. Now I haven't been there to analyze his soil. But I know he wouldn't lie to me. So you can go on and on about me being ignorant or thinking I'd quit the hobby if I had to hunt down there. I happen to disagree with both statements. I believe if I were to hunt the areas my buddy hunts, my results would be similar to his. As far as letting you know where those sites are..... not a chance.

Anyone who understands how metal detectors work will recognize that depth of detection has too many variables to think that what works for one person will work for everyone. A point I was trying to make is to properly set up your detector. Those familiar with the functionality of the 705 realize how implementing Tracking GB Offset will enhance the operation in areas that are heavily mineralized because the X-TERRA 705 has functionality to compensate for the effects of both magnetic and conductive mineralization. The second point was that a DD coil will better neutralize the effects of mineralization than concentric coils. So I suggested that if he bought an X-705, he consider getting the pack without the stock concentric.

In the future, if you want to disagree with something that anyone posts to this forum, please refrain from using derrogatory comments. If your "opinion" is different, explain your point of view in factual terms and how you may have overcome the situation. Don't simply tell the poster he is ignorant and would quit the hobby if he had to hunt there. Posting those types of comments really serves no useful purpose. HH Randy
 
Digger said:
Ya know, I've been called a lot of things over the years. But I don't recall having ever been called ignorant. Nor would I quit the hobby if I weren't able to detect the red Georgia clay to the same "depth" as I do my moderately mineralized Midwestern soil.
I didn't directly call you ignorant. I don't think you are an ignorant person. I thought I skirted the edge of being derogatory. I just don't think many experts have a clue what our conditions are like here! And why would the experts? They are cleaning up in silver in the heartland, or getting large cents in New England. If I sound a little jealous, well I am! It is very frustrating that we can only find clad, a good number of wheats, and one or two silver coins every few months, all under 5 inches deep. I am gathering information to help the red clayers. (I am not talking about the desert clay either.) Now I do have a friend in the Tennessee Valley that is finding a silver coin weekly, but he is finding them at 4-6 inches mostly, and I am thinking his soil might be a little better in a river valley and limestone region. (less infused with tiny black pebbles and grains that stick to magnets.)

http://en.wikipedia.org/wiki/Ultisols


Digger said:
I've met many challenges in life that are far worse than detecting in mineralized soil. (and I'm not just talking about moderating this forum :rage:) Since I don't live in Georgia, I don't consider myself to be an expert about detecting in red Georgia clay. But I have a good friend who has been detecting the area north and west of Savannah, GA for 25 years. In recent years, he's used several X-TERRAs, as well as an E-TRAC, Advantage, Tejon, MXT, F-75 and T2. He has told me about finding coins and buttons at or near the depths I described, using several of those detectors. Even his X-705. Now I haven't been there to analyze his soil. But I know he wouldn't lie to me. So you can go on and on about me being ignorant or thinking I'd quit the hobby if I had to hunt down there. I happen to disagree with both statements. I believe if I were to hunt the areas my buddy hunts, my results would be similar to his. As far as letting you know where those sites are..... not a chance.

Savannah and the area to the Northwest of it is in an area known as the coastal plain. Detecting there is a lot like detecting at the beach, except that the ocean is not near by.

300px-AtlCoastalPlain.jpg


http://en.wikipedia.org/wiki/Atlantic_coastal_plain

Digger said:
Anyone who understands how metal detectors work will recognize that depth of detection has too many variables to think that what works for one person will work for everyone. A point I was trying to make is to properly set up your detector. Those familiar with the functionality of the 705 realize how implementing Tracking GB Offset will enhance the operation in areas that are heavily mineralized because the X-TERRA 705 has functionality to compensate for the effects of both magnetic and conductive mineralization. The second point was that a DD coil will better neutralize the effects of mineralization than concentric coils. So I suggested that if he bought an X-705, he consider getting the pack without the stock concentric.

In the future, if you want to disagree with something that anyone posts to this forum, please refrain from using derrogatory comments. If your "opinion" is different, explain your point of view in factual terms and how you may have overcome the situation. Don't simply tell the poster he is ignorant and would quit the hobby if he had to hunt there. Posting those types of comments really serves no useful purpose. HH Randy

I agree totally the 705 Gold Pack would be a great choice and would allow him to approach, or who knows, exceed the ETracs depth in red clay. A contact in Eastern Tennessee suggested that the multi frequency machines could do a better job of getting through red clay with using only one selected frequency manually. I don't know the details. This can't be done with an E-Trac, unless you figure out what NC channels use a more optimal mix of frequencies. What a waste to get an E-Trac (hypothetically) or a V3i and only use one frequency though. So maybe one of the 3 frequencies of the 705 would be that frequency. I know the experts would recommend the lower frequency for mineralization in general, but is this right for red clay? Who knows? On the other side I know the ETrac would not be a total waste, because it has see through and good ability when dealing with iron, and junk. Not that the OP is considering an ETrac is he?

The guy would be wasting his money if he got something other than a DD coil down here, and a close second on my list would be excellent GB.

I hope my comment draws attention to the fact that the experts are not addressing red clay and whatever is making it so difficult here, ignoring it, and sweeping it under the rug. I honestly think that there are tons of silver coins 6-14 inches down that can't be seen, and the detectorist here are content just getting the ones caught in tree skirts and rocks, or otherwise happen to just be 3 inches deep.

I am a fan of your writings and books, they are great, but I just have to disagree with your comment that your dirt is almost as bad as ours!

When I started the hobby, one of the older and wiser gentlemen at Kellyco answered the phone at Kellyco and consulted me on a potential purchase of a $200 metal detector.

THE FIRST THING HE ASKED ME was "Where do you live? Because if you live more that 100 miles or so from the beach you are going to need manual ground balance and that puts you in a higher price range" Very wise advice, and he may have said something about getting a DD coil, I was little green then, and I would argue that the DD is slightly more important, maybe because I have had manual GB for so long.

Too many times I see the experts not you, on forums, recommend units without even asking where they live.
 
There is some "ignorance" showing Randy but I don't think it's on your side of the fence. HH TomB
 
TomB said:
There is some "ignorance" showing Randy but I don't think it's on your side of the fence. HH TomB

Ha ha ha ha ha. Where do you live? Any information or are you just making derogatory inferences?
 
us Aussies also know a little about heavily mineralised soils in many of our m.d. areas and which are often referred to as the worst in the world
out of need Minelab began here because no other machine could work efficiently and effectively on our soil

best of luck to all with bad mineralisation using whatever machine to cope with it

T59
 
If you do a search on this forum using the words "red clay", you'll find more than 5 pages of posts. HH Randy
 
I have no doubt that all of you out there who are getting 8 to 9" on dimes and 11 to 12" on quarters with your XT's, really are. But I'm telling you there are some areas of the country including my own area of PA where those kinds of depths on dimes and quarters are unachievable with the XT's and Minelabs we are using. I bought a Safari (which I can tell is a really hot machine) in hopes it would give me the kind of depths others are getting with their XT's and it just hasn't happened. While the quality of my finds and in some cases the quantity of those finds has increased dramatically, but not the depth. I realize that my abilities do not match those of you who have been detecting many, many years, but I seriously doubt that you are 50% to 80% better than myself, when it comes to finding coins at depth because of having the honor of hunting with several such gentlemen and their depth was no greater than my own. Which in turn leaves me to believe it is everyone's ground that is causing such a large difference in the amount of depth we are able to achieve on our coins.
 
I don't believe I ever made the comment that my dirt is almost as bad as yours.

ryanchappel said:
I just have to disagree with your comment that your dirt is almost as bad as ours!


Regardless, it appears the gentleman who made this original post is considering the MXT. Good detector and I wish him luck with it.

As many of us have pointed out through the years, depth of detection is relative to the sites you hunt, the detector / coil you are using, the adjustments you make and the experience of the user. For the reasons that became clearly apparent in this string of posts, I will refrain from posting depth comparisons between various parts of the world. HH Randy
 
I have found that with my Xterra I can find coins deeper than I thought in bad ground , I have been in soil that was Iron rich and made all kinds of noise on most detectors and I could still find the targets .
Now does that limit the depth that I can detect ? I am sure that it does .
So far I have found that with the coils that I use that go between 3 khz and 18.75 khz that I can find most targets even in bad soil .
There has only been a few places that I could not do much good and that was in Va and Co/Ut border , east of Moab .

Over time I have found that the Xterra 705 does as well as the more costly detectors in depth no matter where I am hunting until I come up against detectors using larger coils .
I just keep changing coils until I get the one that does the job for where I am with what I have in coils .

After reading Diggers Ebook I have to agree with what he says and does , and the 3 khz coil is one of the main ones I use and the 10.5 DD as those two coils will do just about any hunting that I want. And I have found that even in cluttered areas full of targets I do not have much trouble singling out a target in the trash even using the 10.5" coils , this machine makes it easy . And you can move the coil real slow over the targets and it still works and gets a signal , you can move it a lot slower than some of the other machines will and that is to our advantage .
Another thing I have found about the 705 is that with the way the chip is in the coils and the main unit the signal you get is clean , really clean and this makes tuning your machine easier in bad areas and being able to hear targets in the ground very easy .

The only real gripe that I have is the limited amount of coils for the Xterra , I would like to have a larger version of the 3 khz coil . And I would like to be able to buy larger versions of the DD coils at 7.5 khz and 18.75 khz , as my other machines that I use them on do what I am looking for . I feel like Minelab is limiting me on what I can have for my machine . Some may not need those coils and that is ok , but I want to be able to buy what I want and not what a company says I can have .

I like others have been waiting for more coils to come out but that has not happened . And the the Xterras ,70/705 have been out for quite a while. What puzzles me is this is just about the only Detector that we have a problem getting coils for , aftermarket or company made . If Minelab does not want to invest in making new coils for the Xterras then why do they not license other company's to make aftermarket coils so the Minelab customers can buy what they want for there Minelab machines .

As I read these post I see as some seem to be having problems finding the targets at depths that others are not , I would take or send my Xterra in to make sure that it is setup correct to make sure that it is not the machine that is causing the issue. On the other hand it may be just like what was said , the area of the country that you live in may have soil so hard that you are limited to what depth you can detect .

One thing I will say is get Diggers Ebook , it has a whole lot of very good data on the Xterras and it covers all models of the detectors . Even if you have been detecting for years like I and others have or just starting the book will help , as we can not know or remember it all about what a machine does or will do.
 
Mtnmn said:
I have no doubt that all of you out there who are getting 8 to 9" on dimes and 11 to 12" on quarters with your XT's, really are. But I'm telling you there are some areas of the country including my own area of PA where those kinds of depths on dimes and quarters are unachievable with the XT's and Minelabs we are using. I bought a Safari (which I can tell is a really hot machine) in hopes it would give me the kind of depths others are getting with their XT's and it just hasn't happened. While the quality of my finds and in some cases the quantity of those finds has increased dramatically, but not the depth. I realize that my abilities do not match those of you who have been detecting many, many years, but I seriously doubt that you are 50% to 80% better than myself, when it comes to finding coins at depth because of having the honor of hunting with several such gentlemen and their depth was no greater than my own. Which in turn leaves me to believe it is everyone's ground that is causing such a large difference in the amount of depth we are able to achieve on our coins.

Please let us know if you find anything that works. Ignorant was too strong of a word, I am sorry. Also it is not just red clay, it is small bits of naturally occurring iron or iron ore. Interesting to know that the Safari was not the answer either. So it is probably a weakness of the the FBS technology, it doesn't turn down the poorly performing frequencies enough in our conditions.

There is a poster here that has turned away from VLF to a large degree, in favor of PI, mostly for relic hunting, but that may be impossible in junk infested parks. Maybe a PI like technology could be developed that would key in on coins. A GPX with a coin mode. But they would never develop a technology for such a small group of people such as ourselves, but if the thing were getting coins at 30 inches in black soil maybe it would find one here at 10 inches. That is too far for people to dig, so a company probably couldn't justify its development for without a mass of customers.

We need something PI like that can tell if it is a coin by iron content, size, and 90 degree rotation to see if it is round.

If I could afford it I probably would try a PI and dig small deep targets that come up with iron rejection on.

Feel free to speculate on depth. I am the only one that got angry that people don't respect our soil. This needs to be discussed.
 
Ryan, I know this is the X-terra forum but have you considered something like a Minelab Sovereign, they are effective on bad ground. I tend to use my mine on beaches that are quite mineralised, even get complaints from the PI guys about them. Hope this advances the discussion.
 
That is an idea. I met a guy that works at a sports mega store here that says he has one from when he lived at the beach. He said it reluctantly like it is obsolete, but I am thinking that they are for from it, now! I need to find that guy and see if he has tried it here yet.

I do rely on the display too much, as I don't have an ear for tone differences so much.

It sad that an ETrac would lack capabilities that that Sovereign has. Is it true? Guess I need to buy a detector store and try them all one at a time and report back. That would be nice!
 
Over on the Sovereign forum, on this site, is a link to Excalibur sounds, just the same as the Sov, on American coinage.
I know what you mean about a detector store, I'm currently collecting coils:detecting:
 
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