Many thanks to SRAA contributoe, Paul Harner who notes:

In 1980, I purchased my first serious shortwave radio, a Panasonic RF-2200.  While I enjoyed listening to the international broadcasters, it was the smaller domestic broadcasters that I grew to enjoy more.  Especially the Latin American stations on 49 and 60 meters.  Stations from Colombia and Venezuela were prevalent throughout the evening hours.  Two of the most reliable stations were Venezuelans Radio Rumbos from Caracas (4970 kHz), and Ecos del Torbes from San Cristobal (4980 kHz).  
These stations would broadcast in the evenings and sign-off at 0300 or 0400 UTC. Another was Radio Reloj de Costa Rica on 4832 kHz, which would be heard in the evenings and overnight hours. I enjoyed the music and the style of programming these stations had, and over the years these stations became longtime friends on the airwaves to me.Here is a snippet of Ecos del Torbes from the winter of 1980 on 4980 kHz: