What is the highest power used by an AM station?
In the US, the highest authorized carrier power is 50,000 watts, although directional stations are permitted 52,650 watts TPO to compensate for losses in the phasing system. The highest power ever authorized for an AM station in the US was 500,000 watts, authorized to WLW, Cincinnatti in the 1934. The “Nation’s Station” transmitted at super high power until 1939, when other stations complained. WLW was limited to 50,000 watts except for some “special” broadcasts to Germany during the War.
