ryanchappell said:
Ryan, in a gray clay area in isolated bush where my XT-70 gave false signals in both modes, then my PI handled it very quietly. Yes a PI would handle your red clay better I do think. The Whites TDI Pro (PI) can crudly by tones tell between silver and iron but you lose gold. The GPX has a PI iron discrimination mode for DD coils only, but it is a very crude form of discrimination.
A very good discriminating technology for a PI machine would not be for a small group of people, without a mass of customers is wrong. It is not a small market by any means. It is very much needed around the world, especially in Europe, for prospecting, for beaches, etc.. There is a very high demand for a very good discrimination PI and there would be many 1000's in sales if someone made such a machine. It is just that the technology is not on the market yet. A fellow from Charlotte, North Carolina named Dave Emery said he has a good quality discrimination PI technology. His machines are called the Pulse Devil--Nemesis. He has delayed and delayed the release and not out as of yet.
For VLF's, I have not seen but only heard the Minelab Musketeer Advantage works good on red Georgia clay.
http://www.findmall.com/read.php?34,1440805
Posted by: Reg
Date: May 04, 2011 10:51AM
"Your assumption is that manufacturers are not interested in building a discriminating PI. Well, you couldn't be more wrong. The truth is, it is not as simple as you might think and most manufactures haven't figured out a means of doing it consistently.
BTW, I mentioned this before but Eric Foster built a discriminating PI back in the 80's that worked fine on a clean beach free of ground minerals. Unfortunately, take that same detector inland and it sucked about the same way an old TR type detector did. Ground signals simply made the disc feature not useable.
Dave Emery has been working on a discriminating PI for years now. Most people who have followed that history know it as the Pulse Devil. Later versions are now called the Nemesis. Does this detector exist? Yes and several people have seen a working model. Will his design really work? Yep, it will. When will it be available? Only Dave can answer that. We have been waiting for years now for reasons I won't go into. Regardless, it will be when Dave is ready and able."
Hi Dave, If you ever invent(and maybe Patent) good discrimination (even a very basic, simple analog dial) for a Pulse Induction unit. I will almost guarantee you, you will be a millionaire and a very wealthy person in metal detector sales. Such a thing does not exist as of yet. BUT who ever puts out of the first one will have MANY 1000's of units in sales. I tell you that in honesty. Keep up the good work.
Dave Emery wrote, "There are several versions of the Pulse Devil. The first to be released is a super deep seeking detector called the Nemesis. This detector has a variable discrimination control which can be set from small nails to pulltabs. The discrimination method is being patent applied for. It has to be seen to be believed as it allows detection of small coins and jewelry near to and even beneath iron objects."
