Wayfarer
Member
Congrats on the new XL Pro. I love mine...it's my primary detector and my XLT is my backup.
Let me jump in on this TR Disc. discussion. My first detector was a Coinmaster 2 DB from the late 70's, and it was TR Disc *only*. For the first few years, I thought that TR/Disc. was just simply how it was done! In TR Disc., the Disc. control functions like a rheostat from zero disc to normal max disc. (i.e.: to just below zinc cents). Mineralized ground acts like a weak iron target. You can effectively balance out the ground by setting the disc. control to somewhere just above zero at a point where raising and lowering the loop to the ground produces no change in tone, similar to regular ground balancing. At this point you are effectively discriminating out the weak iron mineralization in the ground and can get about the same depth as you can in GEB/Norm. mode when properly ground balanced.
Using the Disc. control in this way is simply "balancing" or discriminating, out the ground mineralization. If you want to keep the perfect ground balance then you are stuck with keeping the Disc. control at that spot. However, and here's the main point I want to make, you can still crank the Disc. up past where the ground is balanced, but then you start losing depth quickly. You can choose to set discrimination high enough to reject nails (or even higher) at the expense of a lot of depth. Using my old 2 DB and now my XL Pro, I can generally reject up through nails and small foil and still get around 3-4" depth in my moderately mineralized soil here in Texas. Or I can crank it all the way past tabs and get 1-2". That sounds like really crappy depth, and it is, but at a super-trashy site, having 3" of depth capability with iron rejected in a completely stable NON-motion mode can really help pick out those masked targets, at least the shallower ones. It is certainly better than having to pass on the area completely, since there is no way GEB/Disc. even with the tiniest sniper coil, could ever pick out the targets that TR Disc. can, and GEB/Norm. can't reject iron at all.
So there you have it. TR/Disc. can *either* balance out the ground *or* can give you some modest rejection of, say, iron at the expense of depth. TR/Disc. also has the advantage of generally being quiter, more stable, and probviding more positve rejection of targets, than eithr of the GEB modes.
Now that's how I use TR/Disc. as useful for coinshooting. I have heard that it is even more useful for prospecting, but I don;t have any experience there.
Good luck with that XL Pro, and again, congratulations on joining the exclusive club of those who own the best VLF detector ever!
Let me jump in on this TR Disc. discussion. My first detector was a Coinmaster 2 DB from the late 70's, and it was TR Disc *only*. For the first few years, I thought that TR/Disc. was just simply how it was done! In TR Disc., the Disc. control functions like a rheostat from zero disc to normal max disc. (i.e.: to just below zinc cents). Mineralized ground acts like a weak iron target. You can effectively balance out the ground by setting the disc. control to somewhere just above zero at a point where raising and lowering the loop to the ground produces no change in tone, similar to regular ground balancing. At this point you are effectively discriminating out the weak iron mineralization in the ground and can get about the same depth as you can in GEB/Norm. mode when properly ground balanced.
Using the Disc. control in this way is simply "balancing" or discriminating, out the ground mineralization. If you want to keep the perfect ground balance then you are stuck with keeping the Disc. control at that spot. However, and here's the main point I want to make, you can still crank the Disc. up past where the ground is balanced, but then you start losing depth quickly. You can choose to set discrimination high enough to reject nails (or even higher) at the expense of a lot of depth. Using my old 2 DB and now my XL Pro, I can generally reject up through nails and small foil and still get around 3-4" depth in my moderately mineralized soil here in Texas. Or I can crank it all the way past tabs and get 1-2". That sounds like really crappy depth, and it is, but at a super-trashy site, having 3" of depth capability with iron rejected in a completely stable NON-motion mode can really help pick out those masked targets, at least the shallower ones. It is certainly better than having to pass on the area completely, since there is no way GEB/Disc. even with the tiniest sniper coil, could ever pick out the targets that TR Disc. can, and GEB/Norm. can't reject iron at all.
So there you have it. TR/Disc. can *either* balance out the ground *or* can give you some modest rejection of, say, iron at the expense of depth. TR/Disc. also has the advantage of generally being quiter, more stable, and probviding more positve rejection of targets, than eithr of the GEB modes.
Now that's how I use TR/Disc. as useful for coinshooting. I have heard that it is even more useful for prospecting, but I don;t have any experience there.
Good luck with that XL Pro, and again, congratulations on joining the exclusive club of those who own the best VLF detector ever!
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