The station traces its history to May 19, 1945, when television set and equipment manufacturer Allen B. DuMont founded W3XWT, the second experimental station in the nation's capital (after NBC's W3XNB, forerunner to WRC-TV). Later in 1945, DuMont Laboratories began a series of experimental coaxial cable hookups between W3XWT and its other television station, WABD (now WNYW) in New York City. These hookups were the beginning of the DuMont Television Network, the world's first commercial television network. DuMont began regular network service in 1946. The Federal Communications Commission (FCC) granted a 90-day commercial license – the first in the nation's capital – to WTTG that November 29, and the first program that aired on the station was a Washington Lions hockey game from Uline Arena on December 10, sponsored by the U.S. Rubber Company. It continued using the experimental 5 kW transmitter of W3XWT until late in 1947, when work had progressed enough on its final transmission site to move there at low power; DuMont did not complete construction and begin full-time, full-power operation until June 1949.