I ain't sayin' nothing, just the crickets chirping.
Sand/bad soil, heavy trash, same thing. You don't turn the disc up, you turn it down just enough if you want more depth and not dig too much trash. It's elementary my dear Watson.
Not so elementary. Unless you have disc set ridiculously high (i.e., >> than 15) and I do not recommend ever setting it above 10, turning disc down from 10 to 0 or even to the negative range on Deus or ORX doesn't increase depth. That is a common misconception. You do not increase depth by running 0 disc on Deus. Mineralization will decrease detection depth in general but decreasing disc will not improve that situation. You can prove it to yourself using a test garden or even an air test. As a matter of fact, one Deus user who posts regularly here and is very successful even demonstrated in his test garden that cranking Disc even up into the 40's and 50's had no affect on his ability to detect the deepest targets in his test garden. See the video in this thread.
http://www.treasurenet.com/forums/deus/584973-nice-old-gold-class-ring.html
Now I personally don't recommend setting disc that high. I do think that under certain circumstances you you could actually limit depth, but if you keep disc set no higher than necessary to filter out iron which is basically, no higher than about 10, you should really have no impact on depth at all for detecting non-ferrous targets. Andy Sabisch demonstrates this in his Deus Bootcamp classes and also states in his book that you should never use more disc than is necessary, but does not recommend reducing disc below 6.1 and not higher than 10 which happens to be the disc default setting range for most of the Deus pre-loaded programs except for Gary Blackwell's "Deep" (Disc 5.5) and "Hot" (Disc -6.4) programs [more about that below]. That is no accident. As I explained previously, XP designed the Horseshoe display to work accurately and stable at Disc settings 6.1 and higher. Lower disc settings cause the horseshoe display to be erratic or inaccurate in it's display of ferrous vs. non-ferrous and depth. Other than that and the propensity to for iron to down average nearby non-ferrous targets (which using disc mitigates), there is nothing wrong with using lower discrimination, but it really gains you nothing in depth and like I said, by using Iron Volume you can also still hear the iron even if it falls in the discriminated range. Gary Blackwell likes to run no disc or negative disc and often provides videos showing custom programs like his radar program that run without disc. This is a philosophical difference between how Gary likes to run Deus and how XP Deus designer Alain Loubet approached the disc filter on Deus. I am not sure exactly why Gary likes to run his programs this way, but I think it stems from his experience with other detectors from Whites and Garrett where the iron discrimination circuit even at lower disc settings could really adversely affect detection depth. That is ingrained in an experienced detectorists DNA when they come over to Deus and I think it results in the Disc affecting depth misconception. Certainly, the "knob" is there and allows you to crank down disc and if you think it is giving you more depth, by all means have at lowering it, but it would not be the first thing I would adjust if I were having issues in bad soil.
If you need to block out signals above TID 10, I recommend using notch instead of discrimination to ensure you don't affect non-ferrous detection depth, though in the thread I linked above user bharpring seems to not have any depth issues running very high disc settings instead of notch. I sort of duplicated his results in my test garden too, so you can try experimenting with that.
But like I said in a previous post, if lower disc (or any other setting adjustment) works for you or even if you THINK it works for you despite what the so-called experts say, than go for it.
That's MY story and I'm sticking to it.
HTH
