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X-Terra 70 and different frequency coils. I don't understand

S

sandnsea49

Member
I have been considering getting the X-Terra 70 but don't understand the need for different coils for different frequencies. I currently have an Explorer XS and get all those frequencies in one coil and one detector. With the X70 I would have to have more coils to change frequencies. And what to hunt with what frequency? So I find coins with one and rings with another? I can find both with the Explorer, using the same coil. So explain to me the advantages of this machine. I am skeptical and am thinking this is just a ruse by the manufacturer to get you to buy all these different coils to get the same job done as the Explorer with one coil. Thanks, Tom
 
Even though your XS covers the freq's that the 70 has in its different coils, the XS does not fully utilise them all.
The 70 when it runs on whatever freq, say 18.75khz is cranked up all the way for that freq, 100%.
The XS may also have that range, or thereabouts, but only uses a portion of its total power to put into that freq.
It sort of "power shares" with its total freq range. Get your XS and say a small bit of specie gold with little bits of gold running through it for example. The Terra70 will howl on it and yet often the XS wont even know its there. The same goes for the Sovereign series as well.
Each time you change your coil to a different freq on the Terra it locks it in to its system and fully utilises it to the max, full bore.
Its entire depth of detection is on say, 18.75khz or 7.5khz etc. With the Explorer this is not the case and I believe its with its lower freq's that do the ultimate depth work even though its higher ones are also sampling but not with as much or anywhere near the total power that the 70 works on. The 70's claim to fame with what it can do with its different coils is no ruse. I use one and have found it to be the "BEST" VLF detector I have ever used on gold nugget and specimen hunting. I have used Explorers and Sovereigns to hunt for gold before and I can tell you the Terra blows them out of the water. Others will agree. Coins jewelery and so on in parks and on beaches, well I cant give advise there, but I have heard of guys ditching their Sov's and Explorers for Terra's after having a go on them.
 
If your Explorer does everything so great with one coil, why are you considering an X-Terra?

I've used the Explorer. It may be the finest silver coin detector on the market. But no, it does not do everything perfectly. It is basically tuned for high conductors and is only ok on low conductors. I'm into gold and as B.T. notes the X-Terra 70 blows the Explorer away as a gold machine and for far less money. The only place the Explorer would be better than an X-Terra for gold would be in wet saltwater sand which is where multifrequency has a distinct edge over single frequency. Plus, I always found the Explorer a bit too heavy for my liking. So even for coin detecting I prefer the X-Terra over the 70 even though I'd be the first to admit the Explorer has the edge on the deep silver. But in thick trash there is still silver to be found at X-Terra depths, and that new 6" DD on an X-Terra will will easily sniff those coins out. Just like you'd need a small coil to do the same with your Explorer. There are more reasons to get coils than just frequency.

Anyway, for $699 a lot of people could get an X-Terra 70 and use only the stock coil and be perfectly happy. It is only us true detector nerds that get all nutty over extra coils anyway!

Steve Herschbach
 
I agree with the below posts by BT and Steve. I had an XS and I think one of the biggers differences between that and the X-70 is the recovery speed in trashy situations. On my XS, I had to run it wide open so it wouldn't null out and when it did null. it took a few seconds to recover. The X-70 is lightning fast in this respect no matter what discrimination level you are running it in. The Explorers have the edge in depth, that is an undisputed fact. But the X-T's have the edge in weight and the fast response. Ron
 
I have to disagree.

I have both the X terra 70 and a sov GT, one fing is for sure, the GT nulls a lot, BUT thats only cos it reads so much more signels per given sweep.

Just think about it, one detector sweeps the same spot, one goes only 2 inches deep, and one goes 12 inches deep, which will read more signels.

I to used to think the sov recovery was slow, but it is not, people who dont know what they are talking about say its slow, even though a sov has nulled, and is about to come back to a threshold tone, if it hits a good signel, it WILL tell you. even though it was nulling at the time.

I do agree about the set feq, it is locked on to just one freq and hence it will give a better responce to what ever suits that coil, but how do you know what you have found before you dig it in order to have slected the right coil in the first place.

Far better to cover most angles with the multi freq detector unless you have only one type of target you want to find.
 
I was comparing the X-70 to the Explorer XS, not the Sov.
 
I think their idea was to make a base model that could be used by different groups of detectorists just by changing coils. It would have been nice to have a machine that you could change frequencies at a push of a button, but I suspect White's has the patent on that. Ron
 
The XS and the Xterra 70 are totally different machines. Its not about BBS or VFLex technology here its all about whatever suits you as a whole package. Action always speaks louder then words in this hobby and the ultimate thing to do is to take the 70 for a drive and see how it feels and performs. I had an Exp II and loved it but the Xterra 70 suits me better for what I do and where I go. I like the concept of different frequency coils and use this to my advantage. Any detector is a good machine if it can find you what you want but not every detector will GIVE you what you want and the 70 does that for me for now :biggrin:
Cheers!
 
I thought about what you said, about detecting the same spot with two detectors......

"One goes only 2-inches deep and the other one goes 12-inches deep."

If you are only getting your Sovereign to hunt 2-inches deep, you need to spend more time with the X-Terra! :rofl: HH Randy
 
but as was stated us detector nerds are always looking for a better, faster, deeper, lighter machine. I have been also considering a F75 by Fisher/Bounty Hunter, but have tried Fishers before and did not like them. I hear a lot of great stuff about the F75 but also hear a lot of bad. I don't hear any bad about the X70. But I have to agree with Piero, "how do you know what you have found before you dig it, in order to have selected the right coil in the first place". And that was one of my questions, with my XS I might be hunting strictly coins, but I do occassionly find gold rings because the machinge also uses the lower frequencies to do that. If I use the X70 and the higher frequency coil I will miss the gold but find the coins. So I would then have to switch to the lower frequency coil to find gold but miss coins. That seems counterproductive to me. Or am I missing the boat here?

thanks for all the responses. All this is going to help me in my selection of my next machine.
 
That is the point intierly.

It seems that the X-terra lot with each ones faverot coil, all know what they want to find, and hence choose a coil to suit,

If you want to cover differant targets you will need the multi freq detectos, and as pointed out, they will cover all, but not as good to a spacific type detector.

One thing you might want to ask, is what have I missed if I have chossen the wrong coil for what I have just passed over, It could be that one find in a life time.
 
I agree with the posts allready made here by B.T, Steve and others.

I think maybe minelab have learned all the advantages and disadvantages from their mulifreq machines and also from their golddetector with 3 selectable freqs going through the same coil.

I believe the terra concept gives the better punch if you select correct coils for your needs.

BTW, had to try so i bought a 4.5 grain testnugget in a pokerchip off ebay and got it sent to Norway.

The explorer could not sens the nugget even with contact to the coil whatever I tried. The terra 70 in prospect got a recognicable signal at nearly 5" in air with the 6" DD coil. I measured it several times. I wonder what it would have been in the goldfields with some nasty ground but my test gave me enough confidence to know that i will not be missing many hammered coins within 6" of european dirt. Thats for sure. Its a very very good machine that still has not got the praise it deserves.

bfodnes
 
Hi Piero.

I have had the XS since april 2000 and it is a fabulous machine. It have found 400 silver coins for me from before 1920. I trusted the machine to the point of it being a god for me but after a while i started to get suspicious. I was not finding as much thin hammered coins as I used to with my Bandido and even Fishers and Sovereign. What was the problem?

The problem was of course me that had not tested the XS good enough for my conditions. It sends 28 freqs into the ground maybe but only the lowest freqs have better punch then a single freq machine. The higher the freq the less power you get and at 12 and up a single freq machine like the terra, mxt, several others just blow it away.

One thing I have learned from reading the net is that the higher the freq the more punch power you need to get the best out of that freq. Maybe that is why my XS seem to be the best milled silver hunter ever but just a regular hammered finder.

Maybe that is why different coils with a chip in them works better so that voltage can better be regulated for different windings in the coil and use the 6 volt power supply at its best for that freq.

Who knows? but I know for a fact that the terra beats the XS on hammered coins and nuggets.

Regards.

Bfodnes
 
with the stock medium freq coil on the xterra you can find coins, relics, jewelry , pretty much what your finding with your explorer.

the other coils enhance finding certain objects. Ive got sovs and an Xterra 70.

I dont really agree with pieros view on this as I do usually hunt for one type of object which is jewelry. I will in fact use my meter on a beach, and avoid digging dimes and quarters unless certain conditions warrant it. I mostly use the high freq DD coil on my xterra as it will hit small chains and so forth, increasing my odds of finding those.

I dont think its a deception on minelabs part at all but an option. even with the stock coil its a superb detector and because its so easy to adjust its fun to use...

HH
Neil
 
I am no expert, but you and others are saying what I am saying, only you dont realise it!!!!!!!!!!!!!!

a few replys up, some guy said I dont agree with piero about single freq detectors only being good for one type thing, then went on to say he only hunts for gold on the beach with the high freq coil.

You dont need the amout of freq as the SE has, I dont think so any way, nor even the amout the sov uses.

A single freq detector with the right coil for the finds you want, will allways be better in tune to find the object than a multi freq detector,

so you need to know what you want, then choose the right coil, and you should expect to find in more easily, but at the same time as doing a better job for that type target, it will also do a worst job on any other type of targets, how can it not!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 
I hunt In USA in State of Va. for Civil War Relics. The type ground can change from nice "Sandy Soil, Red Clay. or what we call in some are In Va. "Soil From Mars" It so bad you can place ant target at 3 inches and you be lucky to here in in All metal Only, The Soil that Hot. I have had my X-70 for 9 month and been very pleased and made great finds. The biggest plus with X-70 if you have just few coil you can Hunt Anywhere, and any soil with confidence. The 10.5 7.5 is my first choice great ground coverage and very stable in most soil. The 3 kHz is killer coil in good soil for relic mixed in lots Iron. The 5X10 Elli cal is hands down great in Hottest ground you hunt. The X-70 is super light weight fast and easy learning curve then Explore and better in trashy sites. In fact few hunters I know have switched to X-70 from Explores! Hope this In-fro Helps!!
 
I never see you post on the Explorer forum? But here you are on the Xterra forum talking about the explorer? Besides, the original question was about different frequency coils for the Xterra anyway and somewhere along the way it now looks like an Explorer / XT70 debate. I just think you missed the boat (Why even mention the Sov GT) and the points that were made by each individual on there experiences and there knowledge about the Xterra 70. If you don't like your XT 70 that much because you cant use it properly why don't you just sell it or even give it to someone who can appreciate it for what it worth.
Cheers!
 
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