If you have ever wondered why radio and television stations always have call signs beginning with W or K, the answer is that those letters were assigned to American airwaves by an international convention held in London in 1912. The United States was given the call letters A, N, W, and K. A and N were reserved respectively for the army and navy. The other two were given to public broadcasters.
Have you ever noticed that radio and television stations in the U.S. start their call signs with the letters W or K? This interesting detail stems from an international agreement made in 1912, during a convention in London dedicated to regulating airwaves. The United States received specific letters for its broadcasting stations.
According to the convention, the call letters A and N were designated for military use, specifically for the Army and Navy. The letters W and K were then allocated for public broadcasting purposes, allowing stations to establish their identities in this fascinating area of communication.