I can not get this channel in eau Claire,WI your channel search says its 5.7 miles away from my house. Eau Claire's NBC affiliate 13.1 and 13.2 lost its 2000 foot tower so maybe the antenna was located on there tower. It collapsed during a winter storm last month.
As the other question askers do , Do This --> http://forum.tvfool.com/showthread.php?t=4 , providing almost no information will get you all most no answers. If helps if you read the other question askers posts so you can tell which way is up.