I bought a Delta as my backup for my F-70 about a month ago. I have been finding small targets with the 5" DD coil that my F70 missed while rehunting sites. Today I hunted a grassy area at an old home site that I had pounded with my F70 [11" DD coil} at least 5 times.
I was hunting with sensitivity at 10 and discriminating out everything below zinc penny. When I get a high pitch sound , even if only one way, I switch to all metal and check the VID. If the parameters are iffy I dig. Long story short---I dug a very nice 1919 Mercury dime 6 inches deep today in an area that I thought was hunted out. The Delta with the 5" DD is a lot of bang for the buck.
I was hunting with sensitivity at 10 and discriminating out everything below zinc penny. When I get a high pitch sound , even if only one way, I switch to all metal and check the VID. If the parameters are iffy I dig. Long story short---I dug a very nice 1919 Mercury dime 6 inches deep today in an area that I thought was hunted out. The Delta with the 5" DD is a lot of bang for the buck.