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Went with a friend who hunts with a 20 yr old Garrett ADS III. Today he was using a two inch coil because his 8 inch coil was acting up. Got a .58 mini ball at eigth inches. I could hear the response even though he was wearing headphones.
The Explorer XS with Sunray 8 inch coil did not give a signal. Set for nail and bottlecap reject, ferrous sounds, ironmask at -10, gain at 7 and sensitivity at 30 in semi-auto.
Any thoughts? Hard to trust it after that.
 
Although a new user of the Explorer saw a friend
dig a tiny button at 14 inches with the Explorer,
perhaps, somehow you discriminated this target...
 
Next time, take it out of semi-auto and see what happens. You probably will have to come down on sensitivity as well.
I am not a big fan of semi-auto. The machine runs with a good threshold, but it fails to give you an indication of how hot it is running and for all you know, you'd been cranked down to something very low.
Also, and this is just an unproven thought, make sure that you noise cancel. I have seen people make the comment that you should run your sensativity down to 16 before you do this, though I generally just come down to 24 or so. And if you are hunting with your ADS owning buddy, you might want to do it before he powers up - it would be interesting to see if the noise cancelling causes you to shift to some less than optimal freqs when he is running his ADS (and costing you some depth in the bargin).
Tim
 
Like Tim said try using manual sensitivity.. personally I dont trust auto.. also when you were checking the signal did he turn off his machine? could be you were picking up interference if he was standing there close by
 
Picked it up fine at about 5 inches. Disappeared completely after that.
 
Will try manual. I had used noise cancel as soon as I turned on the machine, but did not reduce sensitivity beforehand. Did not know that I needed to turn it down.
Both machines were turned on at about the same time with about 20 - 25 feet separation. He did comment that I was not interferring with him for a change.
In manual, should the noise cancel be used before the sens is set/
 
He did not turn his machine off. He was about 15 feet away when I tried the target.
 
Just a note of thanks to everyone who takes the time to reply to the posts in the classroom. I know it is time consuming. All your help is really appreciated.
 
My fire-up order... Turn it on, drop sensitivity to 20-24 (I generally am at 26 or higher when I had turned it off before), drop the coil to the ground and find an area with no metal, and then activate noise cancel.
After that, I gradually increase sensativity until it starts to become unstable and then back off a level or two. If you are getting a good, solid threshold sound, you are there.
If you like to work without a threshold, you are going to have to turn up your threshold momentarily in order to find the highest level of sensativity. After that, you can lower your threshold until it is quiet. (I have been experimenting with this, hoping to catch a few deep coins that might miss otherwise.)
Noise cancel is one of those things that I am uncertain about. I think that the XS sniffs around for spurious EMF and finds the cleanest frequencies to use. I have heard others say that it equates to ground balancing. Perhaps it is a little of both. All I know is that I can work under some powerlines that drove my old Garrett GTAx 1000 nutty once I use the noise cancel option.
Tim
 
when you say "a more optimal frequency", is there one frequency that is better than the other given the same conditions or are you refering to it operating on a frequency that has interference that would not be there on another chanell?
 
[I am close to the end of my technical knowledge here, so if I am wrong or almost but not quite right, anyone that knows more - PLEASE chime in...]
The XS uses FBS which means that it uses 28 frequencies at any given time to detect metal objects. The frequencies range from 1 to 70khz, but only 28 of a possible 70 are in use.
Noise cancel.... The documentation for the XS says the following... "Pressing the NOISE CANCEL button automatically selects the quietest, most stable channel for detecting." (pg33)
Well, if you are using 28 frequencies, what in the heck does that mean? What, pray tell, is a "channel?" Well, without really explaining it, you can manually select channels 1-10 in advanced mode.
From this point, I am guessing. But I think that I am not far from wrong, so stay with me.
I think that a "channel" is a preset selection of frequencies. The default is channel 5, which probably has the widest range and is optimal for detecting objects. If I were designing it, I would have 6 variations on full range (basically just shifting / tightening the frequency selection), and the remaining 4 would be special channels designed to handle broadband noise in both the upper, middle, and lower range of frequencies.
It would be nice if a Minelab rep could spell it out in detail - I personally would like to know what freqs are in use on a given channel. It would also be nice to know what channels to avoid except in special circumstances, assuming Minelab allocated some channels to broadband noise handling.
Tim
 
My understanding is that the 28 frequencies range from 1.5khz to 100 khz.I am not sure exactly what the frequencies in between are.I though the different channels altered the 28 frequencies a little bit from their normal ?frequencies i.e. channel one may shift all of them 1/4 khz,channel 2 may shift the frequencies 1/2 khz etc.
regards
steven
 
I pulled the 1 to 70khz directly from the XS manual. I noted that Kellyco had it listed with 100khz, but I elected to stay with the printed technical specifications.
Tim
 
I was told by Minelab rep the following. When using noise cancel the number of frequencies being transmitted is as follows: ch-1 20, ch-2 18, ch-3 14, ch-4 14, ch-4 15, ch-6 16, ch-7 20 ch-8 20, ch-9 20,ch-10 17 and ch-11,14. The XS never transmits more than 20 frequencies at 1 time. HH Ken
 
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