Both stations carrying the ceremonies dedicating the Lincoln Memorial on May 30, 1922 were operated by the U.S. Navy: NAA, across the Potomac River in Arlington, Virginia, transmitting on the longwave wavelength of 2,650 meters (113 kilohertz), and NOF, located the Anacostia section of Washington, D.C., operating on 412 meters (728 kilohertz on the AM (mediumwave) band).
Popular Radio, August, 1922, page 232:
Harding radio broadcast dedication of the Lincoln Memorial