The only coil that I use on the omega is the 11" on the F-70 11" the CZ-70 10.5 and I didn't start detecting 3 years ago more like 25 years and yes I know what I am doing, any detector I use its adjusted to the max for depth as I am not looking for clad coins.I have a park were I have removed upwards of 400 coins all has been removed down to the 9-10" now I am trying find the ones past the 10" mark with a Explorer Se pro, none of the coins I have found are older than 1910 but the park has been here since 1870's the problem is we have had 3 bad floods since then. if you have never detected in TN then you don't know what fun it can be. I have a test garden as any seasoned coin hunter would have, I know exactly how to use the omega just like jim (TN) said when the conditions are right for me thats in spring when its wet (damp). in my soil a detector will lose 2-3" depth from what it air test all except Explorer's HH
