Just out of curiosity sake, how low do you guys normally run your Fe line when out searching? Do you stick close to factory defaults or have you altered it quite a bit? I'm finding myself to more the less be running open screen and just using tone bin profiles instead of actual discrimination. Right now, I am experimenting with running a combined audio pattern with my Fe line down to 30. I think most programs I have seen, are running it around 20-22ish for the tone bin profile.
In my particular case, what I've found is that in heavy mineral, the ID of non ferrous things gets pulled down away from the infamous 12 Fe line. Some of the more shallow and isolated targets away from trash, will still be along the 12 line but deeper targets and targets in iron or trash, get pulled down away from it. I actually dug an IHP Saturday that was around 25 Fe line...but it was in heavy mineralized ground.
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Another part to this question is something I found recently, and that forum member "squirrel" posted about on another forum. That being the difference in running modes on the CTX.
In heavy mineralized ground, the manual, Andy's book and everything you read, suggests running Ground Coin mode. However, if you are in mineralized ground, all you hear in this mode is one of two things....with an open screen, you hear a constant barrage of ground noise that sounds like iron with the cursor/target trace pegged in the bottom right of the screen...and if you are running any disc pattern that shades in this area, all you hear is a threshold nulling. At first I just thought this was actually due to there being lots of iron in the ground until I had loaded a program I had been playing with, that happened to be Ferrous Coin. In Ferrous Coin, the threshold stays smooth and does not null or waver until the coil is over a target. Squirrel noticed that the machine also runs smooth like that while in Low Trash & Hi Trash modes. Due to this, I have stopped using Ground Coin in favor of Ferrous Coin...with it, I can run basically an all metal mode with tone ID. Any thoughts to why this occurs...Ground Coin vs the others? In some cases while flipping back and forth between modes....targets that I detected CLEARLY in Ferrous Coin were lost in the noise while going to Ground Coin. And again...I am referring to open non trashy ground. Basically open field with an occasional piece of farm junk, but mostly Civil War bullets (it's a firing range so it's just shot bullets everywhere...fun to go play in to kill some time).
In my particular case, what I've found is that in heavy mineral, the ID of non ferrous things gets pulled down away from the infamous 12 Fe line. Some of the more shallow and isolated targets away from trash, will still be along the 12 line but deeper targets and targets in iron or trash, get pulled down away from it. I actually dug an IHP Saturday that was around 25 Fe line...but it was in heavy mineralized ground.
----------------
Another part to this question is something I found recently, and that forum member "squirrel" posted about on another forum. That being the difference in running modes on the CTX.
In heavy mineralized ground, the manual, Andy's book and everything you read, suggests running Ground Coin mode. However, if you are in mineralized ground, all you hear in this mode is one of two things....with an open screen, you hear a constant barrage of ground noise that sounds like iron with the cursor/target trace pegged in the bottom right of the screen...and if you are running any disc pattern that shades in this area, all you hear is a threshold nulling. At first I just thought this was actually due to there being lots of iron in the ground until I had loaded a program I had been playing with, that happened to be Ferrous Coin. In Ferrous Coin, the threshold stays smooth and does not null or waver until the coil is over a target. Squirrel noticed that the machine also runs smooth like that while in Low Trash & Hi Trash modes. Due to this, I have stopped using Ground Coin in favor of Ferrous Coin...with it, I can run basically an all metal mode with tone ID. Any thoughts to why this occurs...Ground Coin vs the others? In some cases while flipping back and forth between modes....targets that I detected CLEARLY in Ferrous Coin were lost in the noise while going to Ground Coin. And again...I am referring to open non trashy ground. Basically open field with an occasional piece of farm junk, but mostly Civil War bullets (it's a firing range so it's just shot bullets everywhere...fun to go play in to kill some time).