False signals when coil is bumped
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Thread: False signals when coil is bumped

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  1. #1

    Mar 2016
    3,038
    4699 times
    All Types Of Treasure Hunting

    False signals when coil is bumped

    Seems like all of my coils end up being useless after about 2 years.
    Itís usually because they start false signaling when bumped or moved quickly.
    This is probably due to the fact I use it in heavy brush and constantly bump it on rocks.

    I currently have a Makro Gold Racer coil and itís to the point of being useless.
    This is a high frequency machine that is ultra sensitive when things are working properly.

    Iím going to take the coil apart and see what the problem is. Anybody ever done this before?

    Iím curious whatís inside. I suspect the coil wire has lost its tension due to the fact that itís not encased in resin, or there is a piece of thin paper bouncing on top of the wire.
    Kray Gelder and A2coins like this.
    This Communication HEREBY Serves as OFFICIAL NOTICE That All Messages in This Thread Have Been REVIEWED. FURTHERMORE, All Messages of Positive Nature SHALL IRREVOCABLY Be Considered "LIKED" INSOFAR as Applicable to This Forum. FINALLY, All Discrimination is Strictly PROHIBITED.

  2. #2
    Charter Member
    us
    papa

    Feb 2017
    Georgetown, SC
    Fisher F75
    4,822
    9435 times
    Metal Detecting
    My F75 falses when bumped on brush or hard objects. This is not rocky terrain in the lowcountry. It's not really an issue. In very dry weather it will false from static when dragging over dry grass or ground cover. I have gotten used to it and recognize it when it happens. I imagine searching rocky ground looking for nuggets is tough on these coils. Good luck to you.
    Loco-Digger likes this.


    "And so the population was gradually led into the demoralising temptations of arcades, baths, and sumptuous banquets. The unsuspecting Britons spoke of such novelties as 'civilisation', when in fact they were only a feature of their enslavement." Tacitus, Roman Senator and Historian, written AD 98.

    The Bald Eagle photo...he/she posed for me, gave me it's best American look. I felt privileged to get the shot.

  3. #3
    us
    Nov 2013
    Pensacola
    Fisher F44 Bounty Hunter QuickSilver
    29
    63 times
    All Types Of Treasure Hunting
    Does this get progressively worse over time (based on the number of "bumps")? I run into this occasionally on my F44 here on Pensacola Beach (just dry sand), when I skim the top of the sand.
    A2coins likes this.

  4. #4
    Charter Member
    us
    Tommy

    Dec 2015
    Ann Arbor
    Equinox 800
    32,371
    41233 times
    All Types Of Treasure Hunting
    Honorable Mentions (2)
    Seems normal on most machines Do you use a coil cover

    Approved TreasureNet Stickers

    .:: $2.00 for 11" X 3" Bumper Sticker ::. I have 34 left PM me if you would like to buy any Tommy

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  5. #5
    Charter Member
    us
    "WP"

    May 2012
    13,546
    23900 times
    Your coil cables wrap pattern ,shape/form can affect such too. A flopping part of cable usually the worst.
    Coil wobble where attached can be checked for too.

    Adding a bumper of 3/4 air hose split on one side and wrapped around coil edge would add weight and a little height from ground , but if you want to experiment . I'll cheer for ya!

  6. #6
    Charter Member
    us
    DEPLORABLE

    Jul 2015
    Port Allegheny, Pennsylvania
    E-trac, Excalibur, XP Deus, & CTX 3030.
    23,029
    23117 times
    All Types Of Treasure Hunting
    Honorable Mentions (1)
    If you use a coil cover, every once in awhile, it should be removed and cleaned.
    SOMETIMES I WISH I DIDN'T KNOW NOW ,,, WHAT I DIDN'T KNOW THEN,, Bob Seger

  7. #7

    Mar 2016
    3,038
    4699 times
    All Types Of Treasure Hunting
    Not my first rodeo.

    I have 4 different coils for this detector and frequently switch them out depending on the type of detecting I’m doing.
    This one particular coil is getting worse and worse. When your looking for faint signals from small pieces of gold buried or partially covered by rocks, you have to really listen to what it’s telling you. If it’s giving you false signals at the end of every swing, when you brush up against grass, or bump the coil, you are having to recheck signals that you should not have even heard. When it gets to that point, I typically buy a new coil. It wears my patience thin quickly, which isn’t good for finding gold.

    Taking it apart for curiosity sake will be better than me slamming it against a tree trunk!

    I have several Fisher GB2 coils sitting around that developed similiar problems. New coil always fixes it regardless of how the cable is wrapped.
    Last edited by IMAUDIGGER; Jan 31, 2019 at 12:54 AM.
    Kray Gelder likes this.
    This Communication HEREBY Serves as OFFICIAL NOTICE That All Messages in This Thread Have Been REVIEWED. FURTHERMORE, All Messages of Positive Nature SHALL IRREVOCABLY Be Considered "LIKED" INSOFAR as Applicable to This Forum. FINALLY, All Discrimination is Strictly PROHIBITED.

  8. #8
    Charter Member
    us
    papa

    Feb 2017
    Georgetown, SC
    Fisher F75
    4,822
    9435 times
    Metal Detecting
    Quote Originally Posted by IMAUDIGGER View Post
    Not my first rodeo.

    I have 4 different coils for this detector and frequently switch them out depending on the type of detecting I’m doing.
    This one particular coil is getting worse and worse. When your looking for faint signals from small pieces of gold buried or partially covered by rocks, you have to really listen to what it’s telling you. If it’s giving you false signals at the end of every swing, when you brush up against grass, or bump the coil, you are having to recheck signals that you should not have even heard. When it gets to that point, I typically buy a new coil. It wears my patience thin quickly, which isn’t good for finding gold.

    Taking it apart for curiosity sake will be better than me slamming it against a tree trunk!

    I have several Fisher GB2 coils sitting around that developed similiar problems. New coil always fixes it regardless of how the cable is wrapped.
    Yeah, take it apart. Maybe a dab or two of RTV sealant to hold a loose part in place may fix it. There's always duct tape! Let us know what you find.


    "And so the population was gradually led into the demoralising temptations of arcades, baths, and sumptuous banquets. The unsuspecting Britons spoke of such novelties as 'civilisation', when in fact they were only a feature of their enslavement." Tacitus, Roman Senator and Historian, written AD 98.

    The Bald Eagle photo...he/she posed for me, gave me it's best American look. I felt privileged to get the shot.

  9. #9
    Charter Member
    us
    Nov 2012
    Maryland
    XP Deus, Tesoro Cibola, Full sized shovel and a backhoe
    16,534
    30356 times
    All Types Of Treasure Hunting
    Banner Finds (8)
    Honorable Mentions (1)
    I have had that with any machine I've owned, but only on certain occasions or when I used the coil as a weed whacker. Which I would never do...no...not me...no...not ever. Is my nose getting longer?
    huntsman53 likes this.

  10. #10

    Apr 2016
    South Western PA
    ACE 250 with DD coil Equinox 600
    3,668
    10830 times
    Metal Detecting
    Banner Finds (2)
    Honorable Mentions (1)
    I had similar problems with my Garrett coils. Micro cracks in the resin. Would work ok until moisture, then go wacky. Would thoroughly dry out, then cover with epoxy 2 part paint. Would last another 3 or 4 months until the moisture was salt water then they would go permanently wacky. Learned to stick with the coil cover even if wrapped in duct tape to hold together after cracking.

 

 

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