A clear-channel station is a North American AM radio station that has the highest level of protection from interference from other stations, particularly from nighttime skywave signals. This classification exists … See more

• Regulation of radio broadcast in the United States
• Clear Channel Communications
• MW DX See more

• AM Station Classes - Clear, Regional, and Local Channels (FCC Website)
• Big USA, Mexico, and Canadian AM radio stations See more

Sixty medium wave frequencies were set aside in 1941 under the North American Regional Broadcasting Agreement (NARBA) for use by … See more

In the early days of radio, regulators had difficulty reducing interference between stations. There were two major limitations: a lack of good frequency control during the 1920s, resulting in heterodyne tones that were encountered far beyond the range of understandable … See more