Through the early 1970s, radio stations would set up just south of the US border and were often called border blasters. The band of frequencies used to broadcast the AM signal can already travel great distances and even farther at night due to atmospheric skip (often called a skywave). Bound by looser restrictions regarding content and broadcast strength, these stations sent their signals out where they could be picked up through much of the southern US. I do believe the song refers to someone listening to those stations.
Through the early 1970s, radio stations would set up just south of the US border and were often called border blasters. The band of frequencies used to broadcast the AM signal can already travel great distances and even farther at night due to atmospheric skip (often called a skywave). Bound by looser restrictions regarding content and broadcast strength, these stations sent their signals out where they could be picked up through much of the southern US. I do believe the song refers to someone listening to those stations.