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Thread: Air test confusion.

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  1. #1

    Jan 2014
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    All Types Of Treasure Hunting

    Air test confusion.

    I have a Minelab Excalibur II and a Minelab 800, when air testing the excel can detect a quarter three times the distance fron the coil than the 800 will. On the beach the 800 has signaled small pull tabs 8 inches down in the sand. this is after the upgrade. any idea why on air testing it is so poor? I have not tried both. on the beach over the same object but may be my project today.
    A2coins likes this.

  2. #2

    Jan 2014
    30
    27 times
    All Types Of Treasure Hunting
    Quote Originally Posted by Ed Osmar View Post
    I have a Minelab Excalibur II and a Minelab 800, when air testing the excel can detect a quarter three times the distance fron the coil than the 800 will. On the beach the 800 has signaled small pull tabs 8 inches down in the sand. this is after the upgrade. any idea why on air testing it is so poor? I have not tried both. on the beach over the same object but may be my project today.
    Went to the salt beach and tried silver and gold. When buried both detectors seemed to be close as to depth for finding silver dime, quarter, and 14K ring. readings a lot closer than the air test, in fact with the 800 I got 2-15 hits one was the ring I knew was there and the other turned out to be a 2oz sinker.
    against the wind likes this.

  3. #3
    Charter Member
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    WP

    Mar 2014
    Dallas,GA
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    I haven't messed with any newer than...2000? detectors..I have never found the "air test" to be accurate at all, in any way.

    Maybe, I misunderstand what your doing. I actually believe that when my dad and I played around years ago, I could get deeper targets in damp soil than in the air with my detector. But that was years ago and I can't remember what we did exactly that we thought this.
    Last edited by Nitric; Sep 15, 2018 at 01:03 PM.
    A2coins and rook3434 like this.

  4. #4
    Charter Member
    us
    Jul 2006
    Orlando, Fl
    Minelab_Equinox_ 800 Minelab_CTX-3030 Minelab_Excal_1000 Minelab_Sovereign_GT Minelab_Safari Minelab_ETrac Whites_Beach_Hunter_ID Fisher_1235_X
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    Not sure about anyone else, I have yet to see any coins or jewelry floating in the air.

    It is well known that Minelab BBS AND FBS detectors do not air test well, actual real world performance is a whole different story. Ignore air testing, BBS, FBS and now the new Multi-IQ of the Equinox excels in real world conditions.
    T.C., jeff of pa, Nitric and 2 others like this.
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  5. #5
    Charter Member
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    Rook

    Nov 2013
    Mississippi
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    Seems to me and I'm no expert by a long shot, just like to dig holes in the ground but air tests don't deal with mineralization or moisture or canslaw above a good target. I believe in setting the machine as best I can for the site I'm on and hoping for the best. Also making adjustments to what I'm hearing.
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  6. #6
    us
    Bill Jones

    May 2007
    Lewiston, Idaho
    Multiple Tesoros and Whites
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    In my opinion, air tests are useful when comparing to earlier air tests to see if a detector has lost performance from an earlier time, or to compare the results from different coils. True, in ground, tests are definitely better to get an idea of the actual performance of a detector in real world conditions.
    luvsdux
    A2coins, George (MN) and Nitric like this.

  7. #7
    Charter Member
    us
    "Is that a Geiger Counter?"

    Feb 2006
    South Central Upstate NY in the foothills of the headlands
    Minelab Musketeer Advantage Pro w/8" & 10" DD coils/Fisher F75se(Upgraded to LTD2) w/11" DD, 6.5" concentric & 9.5" NEL Sharpshooter DD coils/Sunray FX-1 Probe & F-Point/Black Widows/Rattler headphone
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    Air tests are pretty good for flying coins - unless tried indoors.

    Test garden in the soil outdoors is the way to compare.
    Treasure_Hunter and SD51 like this.
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  8. #8
    us
    sprailroad

    Jan 2017
    Grants Pass, Oregon
    Garrett A3B United States Gold Hunter, GTA 1000, AT Pro, Discovery Treasure Baron "Gold Trax", Minelab X-Terra 70, Safari, & EQ 800.
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    Quote Originally Posted by Treasure_Hunter View Post
    Not sure about anyone else, I have yet to see any coins or jewelry floating in the air.

    It is well known that Minelab BBS AND FBS detectors do not air test well, actual real world performance is a whole different story. Ignore air testing, BBS, FBS and now the new Multi-IQ of the Equinox excels in real world conditions.
    Yes, what Treasure Hunter said. I believe it was in Andy Sabisch's book about the Safari, (FBS machine) that FBS machines do not do well in AIR test, and so I would think the same would be true for Multi as well. I sometimes use air test for the sound of a target, and a rough idea of a VDI# for same, but as others have said, for depth in the real world of detecting, all bets are off with air testing really, to many other factors involved. You have two really good machines, run with it, and best of luck.

  9. #9
    Charter Member
    us
    Nov 2012
    Maryland
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    I pay absolutely no attention to air tests or targets laying on top of the ground. None at all. Most decent machines will find coins 6-8" down at a beach. I also wouldn't worry about depth as much as discrimination. I'd also try a test garden if you want. My best tests are when several of us are out together and someone finds a target and we get everyone over to see what their machine says. That is a GOOD test. The results can also be very surprising.
    cudamark and Nitric like this.

  10. #10
    Charter Member
    us
    DEPLORABLE

    Jul 2015
    Port Allegheny, Pennsylvania
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    Well,, what kind of air were you testing??
    Nitric likes this.
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  11. #11

    Apr 2017
    Fisher F75, Minelab Soveriegn XS 2 Nokta pinpointer
    769
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    All Types Of Treasure Hunting
    Fisher F5 and F75 actually air test pretty similar.... I was dissapointed at having paid so much more for the "upgrade" to the F75.....until I hit the field with one detector in each hand. F5 scratchy/ confusing on anything past 5 inches.... F75 clean, clear and stable.

    Sold the F5 shortly after.

    Air tests just arent worth much.

    chub
    Charlie P. (NY) likes this.

  12. #12

    Sep 2018
    TN
    F75+, NOX600, BHLRP
    24
    18 times
    All Types Of Treasure Hunting
    I dont put much thought into air test, but my minelab 600 will hit a quarter at 15"+ with a solid repeatable signal. Wasnt expecting it to test better than my F75 in boost. At the same time it's just an airtest.

  13. #13
    Charter Member

    Feb 2017
    Pa
    EQ 800 & 600 Tesoro Tejon Tesoro Conquistador Bounty hunter Tracker iv
    2,064
    3047 times
    Metal Detecting
    Air testing is great for a baseline for YOUR model. For instance an f75 should see a 10" clad dime on an air test free from EMI. If not then there could be an issue. Other than that not too much worth reading into.
    SouthFLdigger likes this.

 

 

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