Many thanks to SRAA contributor, Jack Widner, who shares the following recording and notes:
Three shortwave stations from Southern Africa signing on in 1976.
The first is the Rhodesian Broadcasting Corporation on 3396khz, the date is probably February 4, the time is 0355UTC. This was during the white occupation. The dips in the audio is due to my tape lifting from the heads slightly until it smooths out. Identification and a long list of FM affiliates.
The second is the Zambian Broadcasting Corporation on 4911khz, believed to be February 16. This is an anthem-like clip of a band, an announcement by a woman, then in English "One Zambia One Nation" before a local language program. The het is awful.
The third is the sign on for Swazi Music Radio on 4980; their Interval Signal was a pop music instrumental of the day called "Popcorn." Programs were DJ playing current hits. Time given would be 0400 and the date also given: 24 February 1976.
Monitored on a Hammarlund HQ-180 with 100 foot inverted V longwire in Indianapolis, IN.