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Thread: Sensitivity question

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  1. #1
    us
    Mar 2018
    South Carolina
    Garrett Ace 300
    9
    13 times
    All Types Of Treasure Hunting

    Sensitivity question

    I have been metal detecting now for a little over a year and really enjoy it and the places I discover. One of the things I keep wondering about is while detecting if a straw blade of grass or pine straw contacts detector plate it pings in the 80's and will sometimes go absolutely nuts where I have to turn the detector off to make it stop. I've read everything I can find to troubleshoot but nothing like it is mentioned. Any ideas or is this normal?
    A2coins likes this.

  2. #2
    Charter Member
    us
    Jul 2006
    Florida
    Minelab_Equinox_ 800 Minelab_CTX-3030 Minelab_Excal_1000 Minelab_Sovereign_GT Minelab_Safari Minelab_ETrac Whites_Beach_Hunter_ID Fisher_1235_X
    37,310
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    All Types Of Treasure Hunting
    It is normal, if you lower your sensitivity it will clear up a lot but remember lowering sensitivity also lowers the depth you get.
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  3. #3
    Charter Member
    us
    Coin Rescue Tech

    Jun 2014
    Northern O-H-I-O
    F75 LTD, 1280X Aquanaut, & an F2 (loaner)
    11,498
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    Metal Detecting
    Banner Finds (1)
    yes it is normal, it is what we call falsing, if you do as TH says it should resolve the issue.
    A2coins and Diggin-N-Dumps like this.
    Rescuing Coins 1 Beep at a time

  4. #4
    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
    10,764
    11319 times
    Metal Detecting
    If you take a detector outdoors where it is silent and hold it out horizontal and tap the coil with your hand (firmly but not a slap - no jewelry on your hand or arm) it should not beep.

    Sometimes windings in the coil are not right and it will give false readings when bumped. I think they call that a "microphonic" coil fault.
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  5. #5

    Apr 2016
    South Western PA
    ACE 250 with DD coil Equinox 600
    2,703
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    Metal Detecting
    Banner Finds (2)
    Honorable Mentions (1)
    I used an Ace250 for a couple years and what you are describing would happen if I was near some kind of electrical interference. Could be visible overhead lines or buried or invisible dog fence. The A250 would also give a beep if you bumped the coil into something, but not go crazy like you are describing, this happened with electrical interference.
    A2coins likes this.

  6. #6
    Charter Member
    us
    Diggin up TEXAS!

    Sep 2009
    Fort Worth,Texas
    CTX 3030 / AT PRO / Etrac w/ NEL
    5,905
    3458 times
    All Types Of Treasure Hunting
    Make sure the connections are tight too...Ive seen it before where it goes nuts and the coil connection was loose.

    Good luck!

  7. #7
    Charter Member
    us
    Tommy

    Dec 2015
    Ann Arbor
    Equinox 800
    19,593
    23967 times
    All Types Of Treasure Hunting
    Honorable Mentions (2)
    Good info
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  8. #8
    Charter Member
    us
    Oct 2014
    Massachusetts
    Garrett: AT Pro, AT Gold & Infinium; Minelab: Explorer SE, II & X-terra 705; Tesoro: Tejon & Outlaw; White's: V3i & DFX
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    Relic Hunting
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    IMHO:

    Check the following: Coil connection at the control box, coil scuff cover for dirt...etc. and firmly secure your coil wire. I run my coil wires 12" - 15" straight up the shaft securing with velcro every 6" - 8", then wrap to the coil box. I hope you do not have a bad coil.

    GL & HH

 

 

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