I have only had my Simplex+ just over a week and I get like a steady "white noise" and a buzz all of the time. I do a ground balance, turn down the sensitivity and change frequencies. Can't get rid of the hum and buzz.
When I swing to the right, it sounds like it hits a target but when I swing back to the left, I hear nothing. It does it in my yard and in open farm fields. I'm tempted to sell the Simplex and go back to my $100.00 Bounty Hunter Tracker IV.