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Offline gambol1Topic starter
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« on: February 05, 2010, 06:28:05 pm »
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Do the more expensive VLF or PI machines eliminate the iron signal completely?

I am new at this. I bought a ACE 150 to get started and in the store the guy that sold it to me showed me how you could set it to "Coins" and the iron, nickle poptop etc sounds would be eliminated while I searched. I somehow thought that the detector wasn't seeing these metals. What I found out when I actually tried it was that the "Coin" setting simply eliminated the audio of the iron target. The detector still "sees" the iron and it interferes with finding the non ferrous targets. Ha!

I know there are some machines that can tell a copper coin from a brass button and I guess that is the discrimination element but when I upgrade I would like to find an instrument that is transparent to ferrous objects. That is to say the signal from a coin will not be affected or masked by a large iron object laying next to it. Is there such a machine?  Sad

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Offline ON THE HUNT
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« Reply #1 on: February 05, 2010, 06:45:06 pm »
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That is how all of them work with iron discrimination.

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Do it right the first time or don't do it at all...
Offline gambol1Topic starter
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« Reply #2 on: February 05, 2010, 07:09:09 pm »
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On the Hunt,

Well that is bad news but I guess Ill have to figure out how to live with it.

Another thing that bothers me is that some coin size, highly rusted iron fragments (or aluminum) give coin signals. iron bottle caps are especially bad.  Do the better machines have this problem as well?

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Offline BitburgAggie_7377
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« Reply #3 on: February 05, 2010, 07:41:21 pm »
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Gambol, some of that iron "junk" can be more valuable than a lot of gold coins.    Some discriminate better than others, but then you risk leaving something really valuable behind.

BA

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Offline xavier
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« Reply #4 on: February 06, 2010, 02:21:25 am »
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Hi Gambol1

I have been designing a building a detector for the past 11 months take three months for the research now from what I found in that research I concluded that I would build it without any discriminator however it dose tell me whether the object is ferrous or not now that gives me the choice to dig or not to dig let me give you an example I do all my testing on a vacant plot next to me there is copper and one hell of a lot of nails now I know that these are nails so I choose not to dig on the other hand if I go to the beach I dig any and all signals as there could be a gold ring next to a bottle top and I do not want to miss that. Hope this will help you

Regards Xavier


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So many questions so little time
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« Reply #5 on: February 06, 2010, 03:28:53 am »
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I'm with you Xavier.  I dug the better part of a fender from a Model T Ford out of the ground the other day.  It about killed me.  The detector kept screaming, and I kept digging, but I was hoping that there was something else there besides the rusted hunks of the fender.  There wasn't, but one day... one day... Smiley

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Anybody who says "it can't be done" will usually be interrupted by somebody who is already doing it.
Offline xavier
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« Reply #6 on: February 06, 2010, 03:45:12 am »
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 Grin Grin It will come just keep digging all those signals

Xavier


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So many questions so little time
Offline gambol1Topic starter
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« Reply #7 on: February 06, 2010, 08:17:45 am »
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Thanks for the advice.I have been trying to get to a point where I can visulize whats in the ground from the noise my machine makes the size and the depth. Right when I thought I had aluminum cans down pat I wound up digging one from 12 inches that was giving a pure coin signal. For now I'm digging all and carrying the junk out. I have 2 ,5 gal buckets junk buckets in the back of my pickup, one for ferrous one for non ferrous and Its about time to empty them again.
 

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Offline Bugar
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« Reply #8 on: February 06, 2010, 02:07:14 pm »
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Some of this ID's as iron, some as trash with the  expensive machines= so, I just dig it all, yep those are diamonds, and the gold is 14K, my beepers, gave questionable beeps but repeating Detecting Wise you shouldn't eliminate  things according to what the manufacturer says, usually they are calibrated in a controlled enviorment, it just takes lots of detecting and paying attention, good stuff will come  Great(here's one o my displays) Wise

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If It Beeps=DIGIT
Offline gambol1Topic starter
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« Reply #9 on: February 06, 2010, 02:29:01 pm »
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Nice stuff there Bugar, Today I worked a house site for about an hour. The house was bulldozed around 2005 as was the top of the ground. the coins were at the base of three big oaks that were left.

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