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Am I expecting too much?

J

JohnApthorp

New member
Hi Guys,
I just need a little advice. I recently received a new Garrett Infinium. Yesterday, I took 3 detectors out to a farm that has very mineralised soil. These 3 detectors were: a Garrett Infinium with the standard 14 x 10 inch DD coil, my Wife's AT Pro with the standard 11 x 9 inch coil & my own pride & joy - a [sub]Minelab[/sub] X-Terra 705 with the 9 x 5 "Goldpack" coil.

I met John on the farm with a Minelab 5000.

I started off by burying a 2.2gm gold nugget @ 3inches. All detectors bar the X-Terra performed well. The Terra, much to my Wife's delight, refused to do a proper noise cancel ( POSSIBLY due to storms in the area) After 30 minutes, I was able to get an acknowledgement that there was a nugget burried under the coil. It was decided by the commedians doing the judging, that maybe they would have dug that signal.:blink:

The 2.2gm nugget was then re-burried at 6 inches. Once again the ML5000 found it with no problems, the AT Pro gave an small signal but we doubt that we would have dug it. 5 inches may have been better for the Pro. My X-Terra - well we won't go there. (I tried the 9 x 5 x 18.75khz coil + the 15inch coiltek but the detector was chucking a hissifit.) I'll be on the beach in a months time & if the Terra doesn't get it's act together, then it's off to the knackery with it.(FeeBay)

Now for the BIG question.
I took the Infinium out with 2 coils - a 14 x 10 inch DD & a 8 inch Mono coil.
I could not get a response from either coil. This surprised me as John pulled out a "bounty Hunter" detector from the very early 1980s & it detected the nugget quite easily @ 6 inches.:veryangry:

Am I expecting too much from the Infinium?

Thanks,
Gary
 
Was the infinium turned on?
 
Infinium should have found it using a very slow sweep speed so long as there was no elec interference, the machine was ground balanced the disc was at zero and op mode was in lock. ( Signal would not be huge) The big Double D might not have been too flash but still should have detected the nugg and with the 8 inch mono it should have been a piece of cake. So, am not sure what the problem was.
Curious to know which bounty Hunter you were refering to although most half decent VLFs With an effective GB for your ground conditions would likely find that nugg.
 
Yes your Infinium should have sounded off crisply on both those depths with both those coils...Try a nickle test as it has same low conductivity as gold nuggets. Bury it at 5 then 10 inches and test with both coils. You should hit it clearly on both test. If not, send it back to Garrett. I had one that detected a nickle at only 2-3 inches max, it happens.

Not a fan of the X-Terra....POS.

Good luck

Alan
 
Thanks for the replies. I guess I'm going to go out again after the storms clear up.
I did have the Disc set to zero, did an initial GB on lock (after doing an interference check & returning the control back to zero) I then did a GB on fast, followed by one on slow.
The speed of the coil over the buried nugget would be classified as very slow. (I did try multiple speeds)

One thing that does come to mind though, When I was trying to detect the nugget @ 3 inches, I noticed that I HAD TO increase the thresh hold from 3 where I could just hear the buzz - up to about 8 on the thresh hold scale to make the target audible. I was using the same Garrett headphones that I used on the AT Pro & the volume control was maxed out. Is this normal?

On my old ML3500, you set the thresh hold to a level that you could just hear. When you passed over the 2.2gm nugget, you were near deafened by the response. Is this the same for the Infinium?

Thanks once again,
Gary.
 
Are the batteries okay and the detector giving 4 beeps when turned on?

Perhaps also check the coil and headphone connections to see if they are locked in

correctly as they are quite tight fitting.
 
Hi,
the Bounty Hunter detector is a "Red Baron - mod RB10"
The instruction manual that John had with it was printed in 1977!!!

Thanks again,
Gary.
 
JohnApthorp said:
Thanks for the replies. I guess I'm going to go out again after the storms clear up.
I did have the Disc set to zero, did an initial GB on lock (after doing an interference check & returning the control back to zero) I then did a GB on fast, followed by one on slow.
The speed of the coil over the buried nugget would be classified as very slow. (I did try multiple speeds)

One thing that does come to mind though, When I was trying to detect the nugget @ 3 inches, I noticed that I HAD TO increase the thresh hold from 3 where I could just hear the buzz - up to about 8 on the thresh hold scale to make the target audible. I was using the same Garrett headphones that I used on the AT Pro & the volume control was maxed out. Is this normal?

On my old ML3500, you set the thresh hold to a level that you could just hear. When you passed over the 2.2gm nugget, you were near deafened by the response. Is this the same for the Infinium?

Thanks once again,
Gary.
Click to expand...

You seem to have done everything right with the Infinium however the threshold works differently on the infinium to most other machines in that as you turn it up the small target signals will become crisper and will not be drowned out by the threshold tone (the target sig will always be above the threshold tone).

I am at a loss to explain why your Inf did not produce a good signal on the 2.2gm nugg as this is a good size nugg and my Inf will find 0.15gm bits.

Comparing the Infinium to the 5000 or even the 3500 is not a fair comparasen as these detectors is are set up to be extra sensitive to very small nuggs and actually are not as good as you might expect them to be on large deep nuggs.
The RB10 has a very good VLF GB Mode so it does not suprise me that it detected your nugg easily.

You said that the A T Pro only just got the target. This is also strange? What conductivity reading did the nugg give with this detector?

Just as a matter of interest can you do an air test on the nugg with the Infinium? and let me know how far out you can get a signal with disc at zero, threshold at 5 and mode in lock and is the tone Hi/ LO or LO/HI?
 
Yeh Adrian is correct as the Infinium needs to be around 5ish threshold. On 3 is hard to hear anything.

Alan
 
Yeah mine hits the only big nugget i have 1.5 gram no problem 6" easy,but my buddy's infinium will do better maybe 1" or so-his will hit smalelr gold than mine also-weird because mine has been updated and new coil.

He found a 2gram nugget 6-7" deep in highly minerlized ancient river gravel with the stock coil/Infinium.
 
Funny the RB 10 did better than the X-Terra because the kHz are different. Did you auto adjust the noise the noise cancel first, then the threshold, then the GB and volume?
Are you testing in the city or country? Don't give up on the X-Terra, it's a fine machine! HH
 
Was there an electric fence close to where you were doing the test or over head lines? The xterra will not noise cancel out under those conditions very well.
 
Hi,
I have been using the X-Terra for over 12months & had no problems. It has paid for itself in coins from the beach. I can only assume that it was the thunderstorm activity in the area.

As for the Infinium - it has hardly stopped raining & the storms are too frequent to go out. The way things are going, I won't have to dig a hole it will all be mud.

Thanks for the suggestions, I'll put them into practice as soon as the Gods calm down.

Gary.
 
The Infinium is always better at finding items that have been in the ground a long time or there naturally or by fate. I did all the same tests you did with the same results don't sweat it or worry about it just spend some time with it and you'll soon understand. My first real nugget with my Infinium was found with the 5"x10" DD coil @ 5" and was 1.8g
 
bearkat4160 said:
Yeh Adrian is correct as the Infinium needs to be around 5ish threshold. On 3 is hard to hear anything.

Alan
Click to expand...

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Up around 5 on threshold is about the right Sizzle (i call it) before target signal ~ which i call breakover

Ken~Digs
 
Not trying to hi jack this thread but very surprised to hear about the poor performance of the X-terra 705. I have only heard good to great things abouth them. I was kind of expecting to hear how the X-terra stomped the other excluding the infinium - I that it would do best of all of them.

Been really think about getting an infinium for a coin shooter wanted something that would look a little deeper then the VLF detectors with the idea that the older and better stuff is out of reach of the normal VLF being swung in the parks. If the 0 to 6 has been picked clean but what abouth the 6 to 12 dirt or maybe even deeper.
 
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