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Why you can't trust your MD

jdstawker

New member
I was hunting a vacant lot next door today and I got a repeatable strong signal. My id and depth indicators told me it was a zinc penny 6 inches deep. 45 minutes later I had dug up a 4" x 4" piece of corragated metal that had been about 12" deep under a 8" by 8" by 3" thick piece of concrete.
 
LOL, GRAY GHOST SAME THING HAPPEN TO ME YESTERDAY BUT ONLY WITH A COUPLE NAILS,IT WAS A NICE PIECE OF SLATE
 
Detectors can only give possible ID, it's definately not infallible on any machine. HH regards Nugget.:detecting:
 
The detector only reads the electrical conductivity of an object. Many other things read the same as a coin. But by sweeping across the target in pinpoint very slowly you should be able to tell if it is a small target like a coin or much larger....Jack
 
Not sure if it is zinc galvanized or not. I haven't cleaned it up enough to know. It is sitting in the driveway along with the concrete. Heck after that much work I am keeping it. Maybe make a center piece out of it.:wiggle:
 
Jack in Texas makes a good point...If you have a no-motion pinpoint mode, use it to outline your target before you dig...move your coil slowly and note where the sound starts and stops as you sweep across the object. You can get a good idea of the size of your target this way...a coin is going to give a short crips sound as you cross over it, but a piece of sheet metal will give a longer, broader sound...

HH,

BH-LandStar
 
Outlining has saved me from many large chunks of pig iron. Failure to outine use to allow me to dig up really cool things like old man hole covers [now thats a find...not].
HH,
Doug in OR
 
The metal detector operator should always determine the source of any repeatable signal. An example of this from last weekends gold field hunt. I use the Infinium LS for prospecting, and gold nuggets usually fall in the high/low catorgory on this dual tone machine. I got a loud low/high hit in the phones and dug the signal, it turned out to be another 4gm nugget. (yee hah) I finished up with 3 nuggets for the trip, with the 4gm being the biggest. The point is that some one reasonably new to the LS or the hobby might have walked away from the target thinking it to be more rubbish. I determined early on in my prospecting career to always determine the source of a signal and never leave a signal in the ground even if it takes an hour or more to dig it. I learnt this principal from an old prospector and it has served me well. It may well be junk, but junk sometimes sits beside, on top of, or underneath a nugget. I know one bloke who has told me that he has a deep signal on the goldfields, I know the general area and frequent it from time to time myself, and long before he came to this region. He reckons that every time he goes out to this spot he digs a bit more. The ground at this spot is EXTREMEY mineralised, and quite a lot of it is solid calcrete. If by chance I ever manage to swing over that particular hole I will dig the signal. It's deep in the calcrete so is unlikely to be rubbish. I may end up with a 3 or 4 ounce piece of gold with a lot of the hole already dug for me, get the picture? When in doubt DIG IT OUT! Never walk away from a signal. HH regards Nugget.:detecting:
 
You CAN trust your detector to tell if there's metal under the coil. What you can't trust is the target id. It's just a best guess by the machine.
HH
BB
 
Well said, Nugget! You might remember Bill Boss from 1980,
the U.S. prospector using a Garrett, who found the 67 oz.
nugget in purple quartz at about 18 inches in hard packed
sandstone.
Took him all day to reach it, but with his success he
brought it back to the states where it was displayed by
Garrett dealers at various detector shows in Texas. I was
privileged to see it and hold it on one such occasion which
was a great experience! I too went to OZ back in ' 81 to
try my hand at a few nuggets but I didn't have Bill's kind
of luck! I really enjoyed my hunt in Australia and I highly
admire and respect it's people. I planned to return but alas,
it didn't work out.
..W
 
I can't remember the name or the nugget Wayne, as I never got into reading GG&T or similar until about 1994 or so. I'll be looking at some back issues of GG&T and hopefully it'll be in them.There's some areas here that white men have never tread. Got some spots picked out from very old biography's etc from men long dead. Some of these I will need to spend 2 days just walking in! another 2 days walking out, (3 if I'm carrying weight, heh heh), and have enough food and water for a weeks prospecting. Even though I like detecting solo, these are areas that I'll need my usual prospecting partner to accompany me, in fact he's the only bloke I've trusted anough to share some of these with. He's let me detect on some of his patches, and vice versa so we trust each other enough to be comfortable together in the scrub. I've had military training and know I can survrive even in the harshest desert country, but it's better to be safe than sorry. Hope you get some nice nuggets one day mate! HH regards Nugget.:detecting:
 
Hey Nugget, I failed to mention that Bill Boss found his big specimen
in W.A., north of Perth, near Sandstone. I too was in that area a short
while, but with no big luck. I and my partner searched a large area of
Western Australia, but for the time we had (two months), really didn't
give enough time to each area we visited. I was lucky when I first
arrived in Sydney, to go on walkabout in the city and happened upon
an excellent map store where I bought eight 7.5 minute projection maps
of W.A. which proved to be invaluable when in Perth, because I didn't
know that because of the mini Gold rush in ' 81, there were no maps
available then, having all been bought up by other prospectors. In
fact, I discovered that there were at least 6 more I should've bought in
Sydney, had I been aware of the facts. These are some of those I
did NOT have: Coolgardie, North Coolgardie, Mount Magnet, Dundas,
Peak Hill. These were all rich areas I would like to have searched as
many nice finds were made there, especially in the Coolgardie fields.

If you're in W.A., or go there, an excellent book to get is "Way to the Gold
in Western Australia", by Mike Wattone. I only found this book as I was
leaving for home though and it would have helped us a lot in narrowing our
searches to more productive areas. As I'm sure you know, nothing can be
accomplished without good maps in the outback and I was pleased to see
that the maps we did have were extremely accurate, down to the meter or
less, real tributes to the Cartographer's science and dedication.

Another great nugget find was made in 1980 in Victoria. It was named the
"Hand of Faith" by it's finder, since he had faith that he would make a good
find and since the big nugget was shaped like a hand with a finger pointing
upwards. This magnificent nugget weighed 60 pounds! It was found with a
Garrett. Back in the 80's Garrett was the most popular detector used then,
since it was all a pretty new endeavor with the innovation of VLF's and Garrett
was one of the first, as was Fisher. This huge chunk was found shallowly
near Wedderburn, 130 miles NW of Melbourne. The finder sold this beauty
to none other than the Las Vegas casino "The Golden Nugget Saloon and
Emporium", where it was on display for a number of years. They made him
an offer he couldn't refuse of One Million dollars! Gold in 1981 was valued at
$420 per troy ounce. So $420 X 720 oz.= $302,400, so you can say he made
a pretty fair deal, right? Of course, any big or unusual Gold specimen is
always worth more than just Gold value.

BTW, I can give you a few tips on good areas for nuggets in WA if you ever
need them. Just email me and I'll let you know.
In the meantime, I wish you all the best in your searches!
..W
 
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