As stated earlier, when you start out, you want to keep your DISC/NOTCH knob fully counter-clockwise...This will allow you to pick up all metals...I read a little of the manual for the Lone Star, and was shocked to see the detector has no DISC mode...only ALL-Metal (which is essentially your DISC mode), NOTCH and AUTO NOTCH...NOTCH is completely different from DISC modes...Think of Discrimination like a shadow moving over a wall...As it moves, it takes out more and more of the wall, until eventually, the whole wall is covered (DISCRIMINATED). Now notch is like the chains on a football field...as the refs move the chains, only 10 yards of a 100 yard field are covered, and that small window can slide up and down the field to NOTCH out any given 10 yard segment...So as you turn your DISC?Notch up in a Discrimination mode, you first eliminate small iron nails and foil, then a screw driver, then a hammer, then nickels and small gold, then pull tabs and medium gold, then screw caps and large gold and lead, then zinc and small silver, then dimes and copper and medium silver. It is hard to knock out any coin larger than a quarter, even if you turn the DISC/NOTCH all the way clockwise....as you turn it up, all items lower than the current setting will NOT be detected....No Notch only takes out a section of the metallic spectrum, first iron is notched out, then nickels, and iron will again be seen as well as all above nickels, then pull tabs will be notched out, and every thing else will be seen, then screw caps will be notched out...etc....Remember gold shows in the same area as iron/foil, pull tabs, and screw caps, so you want to dig these signals too, unless you know your in a highly trashy area loaded with pull tabs and screw caps...
Auto-Notch automatically sets the machine up to hunt for coins only....it automatically eliminates iron and most pull tabs and screw caps...Remember I said most...some pull tabs and screw caps will still be detected depending on their size and shapes...
HH,
GoGoGopher - Formerly BH-LandStar