WGST AM 640 ("Talk 640 WGST") is a radio station licensed in the city of Atlanta, Georgia. WGST is a Class B station operating on the frequency of 640 kHz with 50,000 watts of power during the daytime, and 1,000 watts of power during nighttime hours; a two-tower directional antenna is used, with differing patterns daytime and nighttime based from its transmitter site in West Atlanta.