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Thread: VDI charts

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  1. #16
    us
    Jan 2013
    CTX 3030 (Newbie)
    6
    1 times
    Metal Detecting
    Anyone that says, "Dont trust a VDI chart" must not have a capable VDI machine. They are typically very accurate, and can certainly increase your confidence on the dig.

  2. #17
    us
    Nov 2012
    Cincinnati Ohio
    White's V3i / Garrett AT Pro
    1,708
    693 times
    Metal Detecting
    Honorable Mentions (2)
    I agree, I have a V3i and I was just pointing out that certain factors can effect your VDI readings. Silver usually hits in the upper 80's but the Merc I found on edge rang a consistent 49 from any direction. Nothing else was near the hole to mask the signal. I was stunned to see what I found when I dug it. In most cases I can tell what I'm digging by the VDI though.

  3. #18
    us
    Aug 2009
    White's MXT300 D2, 950, 6X10 DD, 4X6 DD, detech ultimate 13" DD coils
    1,589
    186 times
    All Types Of Treasure Hunting
    VDI numbers can be useful and pretty much spot on, but when you get a really deep target and the detector is barely able to pick the target up its not going to give the same VDI as it would if its say 8" or less. I've also ran into a silver dime and a nickle setting right on top of each other that came up as 32VDI which is usually the older style pull tabs which I almost past up except the place I was detecting was really clean so I decided to dig. Going by sound is great but even some junk sounds good and if you get into a spot where your digging the same junk aluminum piece's or what ever and its all over the place knowing what VDI it is so you can avoid it is going to be a big help especially when in someones nice yard where you don't want to make a thousand holes no matter how neat you are. HH

  4. #19
    us
    Apr 2010
    NC
    Garrett AT-Pro & White's TDI & Tesoro Compass uMax
    558
    62 times
    Relic Hunting
    Quote Originally Posted by Nolan View Post
    Anyone that says, "Dont trust a VDI chart" must not have a capable VDI machine. They are typically very accurate, and can certainly increase your confidence on the dig.
    No. I understand what can affect target ID such as manual ground balance, trash adjacent to target, angle and depth. I'd love to detect behind you if you dig based on VDI numbers alone.
    Dwight S
    Anyone up for some Dirt Fishin?

  5. #20
    us
    Mar 2012
    Spring TX
    CTX3030/F75LTD/ Garrett AtPro
    4,077
    390 times
    All Types Of Treasure Hunting
    On most detectors, the VDI can vary by one or two digits. An example is on the At Pro, most of the time a clad coin may read a few digits different from a silver coin - the VDI can be affected by the mineralization of the soil, composition of metal, depth of the coin, and whether the coin is flat or on edge. Here is an air test chart for the At Pro based on my customers' tests:

    VDI -- Item
    99 -- Ike Silver Dollar, Morgan Silver Dollar
    98 -- Ike Silver Dollar
    97 -- Ike Silver Dollar
    96 -- Morgan Silver Dollar, Walking Liberty Silver Half Dollar, Franklin Silver Half Dollar, Large Silver Ring
    95 -- 1 Troy Ounce .999 Silver Coin, 4 Quarters in a stack!
    94 --
    93 -- Peace Dollar, Kennedy 40% Silver Half Dollar, Franklin Half Dollar
    92 -- Clad Dollar, Kennedy 40% Silver Half Dollar, Clad Half Dollar, Aluminum Token, Large Silver Ring
    91 -- Barber Half Dollar
    90 -- Presidential Dollar, Clad Half Dollar, Clad Quarter, Large US 1 Cent, Silver British Half Crown
    89 -- Washington Silver Quarter, Clad Quarter
    88 -- Standing Liberty Silver Quarter, Washington Silver Quarter, Clad Quarter, Medium Silver Ring
    87 -- SBA Dollar, Russian 50 Kopek
    86 -- SBA Dollar, Sacajawea Dollar, Spanish 2-Reale, Russian 50 Kopek, Canadian Half Penny
    85 -- Barber Quarter, Clad Quarter, Seated Dime, Matron Head Large Cent
    84 -- Seated Dime, Matron Head Large Cent, Small Silver Ring
    83 -- Mercury Silver Dime, Roosevelt Silver Dime, Clad Dime
    82 -- Clad Dime, Small Silver Charm, 1 Yen Coin (JPN), Large 9K Gold Ring
    81 -- US $20 Gold Piece, Barber Dime, Clad Dime, Seated Dime, 10 Yen Coin (JPN), 1 Yen Coin (JPN), Vintage Silver Ring, Austrian 10 Grochen Coin
    80 -- Barber Dime, Seated Dime, Copper Lincoln 1 Cent, King George Half Penny, 10 Yen Coin (JPN), 1000 Peso Coin (Mexico, 1988), Austrian 10 Grochen Coin, 5 Gram Gold Bar, Large Plated Ring, Small Silver Ring
    79 -- Seated Dime, Heavy Woman's Bracelet Watch
    78 -- King George Penny, Chuck-E-Cheese Token
    77 -- US $10 Gold Piece, 1 Euro Coin (Ireland), New Zealand $2.00, Australian $1.00, British 1 Pound Coin, Chuck-E-Cheese Token
    76 -- Seated Liberty Half Dime, Indian Head 1 Cent, Australian $2.00, New Zealand $1.00, King George Half Penny, 5 Yen Coin (JPN), Medium Plated Ring, Small Silver Ring, Large 14K Gold Ring
    75 -- Bottle Cap, Spanish 1-Reale, Zinc Lincoln 1 Cent, 5 Yen Coin (JPN)
    74 -- Bottle Cap, Rev War British Musket Ball, Copper Lincoln 1 Cent
    73 -- Bottle Cap, Small Silver Ring
    72 -- Bottle Cap, Small Silver Cross, 10 Cent Euro Coin
    71 -- Bottle Cap, Large Tungsten Ring
    70 -- Bottle Cap, Civil War Mini-Ball, Medium Charm
    69 -- US $5 Gold Piece, Civil War Mini-Ball
    68 -- 22K Gold Sovereign, Civil War Mini-Ball
    67 --
    66 -- Large Tungsten Ring, Pop Top, Small Charm, silver bracelet
    65 -- Large 18K Gold & Platinum Ring, 1 Gram Gold Bar
    64 -- 3 nickels on top of each other!
    63 -- Small Silver Earring
    62 -- US $2.50 Gold Piece
    61 -- Indian Head 1 Cent
    60 -- Medium 9K Gold Ring
    59 --
    58 --
    57 -- Large 14K Gold Ring
    56 -- Large 14K Gold Ring
    55 -- Mens Titanium Ring, Medium Gold Plated Sterling Silver Ring
    54 -- Small 14K Gold Ring
    53 -- Pull Tab, Buffalo Nickel, V Nickel, War Nickel, New Nickel, Small Charm, Large 14K White Gold Ring, Medium 14K Gold Ring
    52 -- Pull Tab, Buffalo Nickel, V Nickel, War Nickel, New Nickel, Small Charm
    51 -- 100 Yen Coin (JPN)
    50 -- 3 Cent Piece, 14K Gold Chain, 100 Yen Coin (JPN), 50 Yen Coin (JPN), 2 Peso Gold Coin, Small 10K Gold Ring, Small 9K Gold Ring
    49 -- 3 Cent Piece, 14K Gold Chain, 50 Yen Coin (JPN), small 10K ring
    48 -- $1 Gold Coin (13mm), 14K Gold Chain, 14K Yellow & White Gold Ring
    47 -- Large Junk Earring
    46 --
    45 -- Foil, Small 14K Gold Ring
    44 -- Foil, Small Platinum Engagement Ring
    43 -- Foil, Small 10K Gold Ring, 14K bracelet
    42 -- Foil, Small 10K Gold Ring
    41 -- Foil, Small 14K Gold Ring
    40 -- Foil,14K Hollow Earring (1.3g), Property Marker Pin
    39 -- Foil
    38 -- Foil
    37 -- Foil
    36 -- Foil
    35 -- Foil, Nail
    34 --
    33 --
    32 --
    31 --
    30 --
    29 --
    28 --
    27 --
    26 --
    25 --
    24 --
    23 --
    22 --
    21 --
    20 --
    19 --
    18 --
    17 --
    16 --
    15 -- Washer
    14 --
    13 --
    12 --
    11 --
    10 --
    9 --
    8 --
    7 --
    6 --
    5 --
    4 --
    3 --
    2 --
    1 --

    Wayne

    www.MetalDetectingStuff.com
    Last edited by Metal Detecting Stuff; Jan 16, 2013 at 03:06 PM.

  6. #21
    us
    Jan 2013
    Ohio
    Fisher 1265-X Garrett AT Pro Garrett Pro Pointer Lesche Digger
    19
    Metal Detecting
    I just ordered an AT Pro.......should be here next Tuesday.

  7. #22
    us
    I deal in reality

    Mar 2010
    Maryland
    XLT , surfmaster PI , HAYS 2Box , VIBRA-TECTOR
    8,062
    2112 times
    Metal detecting stuff, At what depth would those VDI numbers be valid? Frank

    Click image for larger version. 

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  8. #23
    us
    Apr 2010
    NC
    Garrett AT-Pro & White's TDI & Tesoro Compass uMax
    558
    62 times
    Relic Hunting
    Quote Originally Posted by Frankn View Post
    Metal detecting stuff, At what depth would those VDI numbers be valid? Frank

    <img src="http://www.treasurenet.com/forums/attachment.php?attachmentid=727930"/>
    Its an air test chart. Those numbers will be close down until its a weak signal which will vary, of course. I've dug 3-ringers at 9"+ that gave no vdi, only a faint tone with my AT Pro. I don't trust those charts. I dug a barber dime that rang 75 on mine. It was shallow and next to trash aluminum.
    Dwight S
    Anyone up for some Dirt Fishin?

  9. #24
    us
    Mar 2012
    Spring TX
    CTX3030/F75LTD/ Garrett AtPro
    4,077
    390 times
    All Types Of Treasure Hunting
    Frankn, it depends on the target and the soil. These were airtest numbers. I find the At Pro ID accurate to about 8-9 inches.

    Wayne

 

 
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