LARRY,I BOUGHT A DFX 300 2 YEARS AGO,READ ALL THE MANUALS ,WATCHED ALL THE VIDEOS,CAME UP WITH MY OWN SETTINGS PLAYING WITH DISCRIMINATION,I SET IT ON THE PRESET FACTORY SETTING OF COIN AND JEWELRY FOR ..ALL.. MY HUNTS,EXCEPT THE BEACH OF COURSE.YOU AHVE GIVEN ME ALOT OF INFO FROM ALL THE FORUMS I'VE BEEN ON. AFTER 2 YEARS I HAVE OVER$200.00 IN CLAD,54 MERCS,23 ROSIES,2 FRANKLINS,2 WALKING LIBERTYS,A BARBER HALD,2 BARBER DIMES,2 BARBER QUARTERS,12 WAR NICKELS,8 BUFFALOS,3 WITH DATES,6 IHS,AND 68 WHEATS,OLDEST 1910.THE JEWELRY CONSIDERING I LIVE IN NORTHEAST GEORGIA,IS UNBELIEVABLE.I HAVE 17 GOLD RINGS,THE BEST I FOUND AT MY DAUGHTERS IN FLORIDA AT AN AMPHITHEATER,IT APPRAISED AT $6000.00.,BUT OVER $10,00 IN GOLD FINDS,AND 46 RINGS THAT ARE 925.MANY ARTIFACTS AND RELICS,ALL IN THE COIN AND JEWELRY SETTING.I SET THE AC AT 72,THE DC AT 33 VCO ON,AND PRE AMP GAIN TO 3.I USE A 6 INCH DOUBLE D EXCELLERATEOR COIL,I HAVE TRIED 3 OTHER COILS I AHVE BOUGHT,BUT ALWAYS COME BACK TO THE SMALL DOUBLE D.I KNOW YOU ARE MUCH MORE EXPERIENCED AND HAVE MANY MORE FINDS,BUT I JUST WANTED TO SAY I LOVE MY DFX.