With hundreds of Tennesse monitors on this site and the freq.'s that they submit to the DB and discuss in their regional forum , I would definetly say RR is the most up to date and accurate web site.
Scan Chattanooga was last updated Dec. 28 th , 2007
On the other hand , RR last updated Hamilton County and Chattanooga
Feb. 16 , 2008.
Always check here first.