WTSO's offices and studios are on South Fish Hatchery Road in Fitchburg (but using Madison as its mailing address). The transmitter is off East Tower Road in McFarland. WTSO operates at 10,000 watts by day. But at night it reduces its power to 5,000 watts, using a directional antenna, because AM 1070 is a clear-channel frequency. WTSO must protect Class A stations KNX Los Angeles and CBA Moncton, New Brunswick, from interference, so the nighttime signal is nulled away from the west and the east. (CBA switched to the FM dial in 2008 but WTSO still must protect the Canadian AM station's former coverage area.) WTSO's former FM translator operates with 250 watts from a 243-meter (798 foot) tower off South Pleasant View Road in Madison.