i'm new to using the equinox 800 and when i go detecting with what ever machine,i target and dig all coins,while we still have them and bank them.this morning i took out my new equinox800 to a park nearby.turn it on in park 1 and proceeded to detect the area.found numerous old and new coins in the ground.thought i was doing okay,then i saw a 20 cent coin laying out in the open,ran the coil over it,hang on,no responce,what's going on here.different directions,still no responce.hmmm tried park 2,strong responce.kinda makes me wonder how many other faint or weak signal i didn't dig in park 1 were in fact keepers.no more park 1's for me.emubob