Many thanks to SRAA contributor, Paul Harner, who notes:
In 1980, Daylight Saving Time began on the 27'th of April. When I was in high school, the Saturday night overnight hours were a favorite time for me to listen to shortwave signals. Especially the domestic Latin American stations on 49 and 60 meters.
On that night, two stations from Colombia were coming in reasonably well, and I decided to record an hour of each of them.
Based in the city of Neiva, "La Voz de Huila" was an affiliate of the TODELAR network ('Primeros en sintonia'). One could easily identify stations from this network through their top of the hour ID's (they used chimes similar to the NBC network in the USA). The station's frequency was 6150 kHz.
Here is a recording of "La Voz de Huila," taken during the 4 AM hour (local time) on 27 April 1980