QUESTION FOR TOM
I ENJOYED YOUR DVD I THOUGHT YOU DID A GOOD JOB. I AM WONDERING IF YOU CAN HELP ME WITH MY F75 UNIT. I DETECT AT A LOT OF OLD CELLAR HOLES IN NORTH EAST WERE MINERALIZATION IS VERY HIGH. WHEN I AM DETECTING I WILL HIT SOMETHING WITH A REPEATED SOUND WITH A GOOD READING AND WILL PULL OUT A PIECE OF JUNK . I USE SENSITIVITY AT ABOUT 89 DISC AT 6 AND DE MODE NO MATTER IF I LOWER SESITIVITY IT IS STILL THE SAME.THANKS