The main KOA tower is in Parker. Thats 50,000 watts.

This link has the history of KOA and talks about how they moved the tower to Parker in 1959 from the previous Tower road location.

http://community-2.webtv.net/N0NNK/KOA850/

The tower is located here 39.50611, -104.76583. its south west of Parker road and Hilltop.

Like others have said that something is not insulated enough from that signal.