ABC Affiliates | ShopTalk Don Welch Set to Retire From WTVC By Merrill Knox on Mar. 24, 2014 - 4:48 PM Don Welch will retire from WTVC, the ABC affiliate in Chattanooga, next month. Welch, who has worked at WTVC since 1990, will officially sign off April 23. Welch is a longtime veteran of local television. He has worked at two othe ...