I believe that 1983 was probably one of the best years for listening to shortwave. All kinds of stations were popping up between 3 and 30 MHz on the radio dial. With the help of Bob Horvitz and Alfonso Montealegre, I compiled an overview of the political clandestine radio stations that were beamed into Latin America for a variety of reasons. Remember that this research was based purely on what had been monitored off the air. There was no Wikipedia. And many wirelesses still got hot!