First, I LOVE my Omega. But several days ago I had the opportunity to hunt a CW campsite in Central Ky (THANKS RICK!)...the site is a large pasture with overhead high tension power lines around two sides of it. Even being more than a football field length away from them I could not get my sensitivity above 60 without it going nuts. Good news is that the Omega still gets great depth at that setting. This is only the 2nd time this has been an issue. i am looking to buy a ferrite choke to put around the cable...hope it can help. Also big rusty nails were banging in just like minie balls..number reading mid 70's to low 80's...dug a ton of them..no bullets though 