National Radio Hall of Famer Charlie Tuna's last day at the CBS owned Los Angeles station was yesterday. Tuna says he's leaving to focus on his growing CharlieTunaSyndication.com company. "In the wake of the continuing massive changes to small, medium market, and even major market stations around the country, we will be focusing on 24/7 formats for stations that have lost the content, top talent, music scheduling and customer service." Tuna worked weekends at KEARTH. READ ON.