"On the top-10 list of DX targets in the 1970s was Spanish Sahara, the broadcast service transmitting from Aaiun in what was then Spanish-ruled Sahara in West Africa. Verification cards and letters were sent to lucky listeners around the world who were able to hear the transmissions which were a mixture of local programs and material from the Spanish national radio. Frequencies on shortwave: 7,230 khz listed as 10 KW and 4,626 khz which was a SSB frequency listed a 5 kilowatts, described as a service for Aaiun and Villa Cisneros, now called Dakhla, about 330 miles south along the coast from Aaiun.
My reception of Radio Sahara was on a Hammarlund HQ-180 receiver, which due to its superb filtering and vernier tuning capability I used to hear numerous African stations. According to the QSL letter received from Radio Sahara, and signed by Amparo Martin, their programming was from “0645 to 01 horas” making this one of the few African stations with a very late (or early in the morning)