Surely, some must remember the Mexican Border Radio stations. Their broadcasts covered much of the USA from super-powerful transmitters across the border. Where Wolfman Jack started. BORDER RADIO | The Handbook of Texas Online| Texas State Historical Association (TSHA)
We used to get one in SE Idaho, Don't recall the #'s but the announcer said "Radio Canyon" in Spanish meaning Radio Cannon and the big guns would go off. Night shift memories.