non-Responsive new coins in the VDI world

Discussion in 'Metal Detecting Questions & Answers' started by sandfisher, Sep 21, 2016.

  1. sandfisher

    sandfisher Well-Known Member

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    Wanted to start a conversation on why new coins don't register with the detector.
    This is, I think, good info for veterans and newbies.
    I've really enjoyed getting into the numbers of the VDI and why an item registers like it does.
    Just because it's silver or gold doesn't mean it will have a high VDI number.


    I have read that new coins will be missed (sometimes) until they have been in the ground for a while.
    Yes, a coin that has been in the ground for a while is a better target. The metal leaches out into the ground.

    These 6 coins were on top of the ground, so I air tested them.
    Quarters = 83
    dime = 78
    But the nickel would not register. I flipped the coin over several times and the detector wouldn't get it. Just a slight hum, barely noticeable.
    I've been using a new White's TreasurPro that I bought in January this year. I've dug lots of jewelry and coins and Hot Wheels and everything. Silver, Bronze, Copper,1 Gold, Brass. And tiny items up to 10 inches down.
    The White's has VDI from -95 to +95. I only use discrimination from 0 to -95. 0 to + 95 is wide open.
    I adjusted the sensitivity from 0 to 8. No difference.

    With this being said, I believe it was because it is a new coin and this means a cheaper grade of metal. It would have to sit in the ground for a while to be noticed.

    I think there is a conversation here. What do ya'll think?


    sandfisher
     

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  2. against the wind

    against the wind Well-Known Member

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    I find your results to be strange. With the exception of the Wartime Nickel, (1942 - 1945), the Jefferson Nickel composition is 75% copper and 25 % nickel.
    Test your machine against an older nickel and then a 2016 nickel. The VDI readings should be the same.
    If your machine is not picking up nickel readings, there may be a problem with the machine, coil, etc.
     
  3. homefire

    homefire Well-Known Member

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    Back to if you want it all Turn off the Discrimination and dig it all. if your not seeing Nickels your not seeing gold rings.
     
  4. sandfisher

    sandfisher Well-Known Member

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    I see nickels , but not the brand new one laying on top of the ground. I dig a lot of nickels that are in the ground.
    Numbers for the nickels I've dug
    22
    17
    27
    55
    A variety of VDI numbers.
    Maybe I should try and upgrade the coil. ATW thanks.
    Homefire, your right, I never dig gold rings.

    sandfisher
     
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  5. Rob1960

    Rob1960 Well-Known Member

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    Check the nickel with another detector. I don't know why it won't register unless the detector is faulty.
     
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  6. sandfisher

    sandfisher Well-Known Member

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    Detector is good. Been digging a lot of nickels and a ton of other stuff. Just that one that I know of. Just strange.
     
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  7. homefire

    homefire Well-Known Member

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    That Nickel may have a Higher Nickel Content then it should.
     
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  8. possum4

    possum4 Well-Known Member

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    Try lining up 2-3 new niks and see if you get a response.....doesn't seem like a big problem anyway
     
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  9. homefire

    homefire Well-Known Member

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    In the PI world Nickels make a good test target simulating the response of a Gold Nugget. The Conductivity is similar.
     
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  10. PRO PHOTOG

    PRO PHOTOG Well-Known Member

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    It could be counterfeit ... but who would waste their time counterfeiting a freaking nickel?!o_O
     
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  11. backwater52

    backwater52 Member

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    Wasting time=U.S. Mint zinclon, people must think they are fertilizer.
     
  12. Orosurf

    Orosurf Well-Known Member

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    Fault in the machine somewhere, or your settings. No way can this happen with a healthy machine.
     
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  13. sojourner

    sojourner Well-Known Member

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    Someone who thinks they still sell a "good 5c cigar":D:ROFLMAO:
     
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  14. sojourner

    sojourner Well-Known Member

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    I'm using a White's M6 and nickels read at 18 top of ground or in the ground. Occasionally one will read as 20 but not very often. Anytime I've dug a 22 it NEVER was a nickel but some type of trash like a pull tab.
     

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