Many thanks to SRAA contributor, Manfred Reiff, who shares the following recording and notes:
The first [Radio Afghanistan] recording is from 1976. The recording was made with the GRUNDIG Satellit 600 Professional recorder unit prototype I got from my uncle who worked at GRUNDIG as mentioned before.
Date: ?, sometime in 1976
Time: around 1130 GMT/UTC
QRG: 15195 kHz
Listen carefully to this recording. In the background you can hear the VOA Yankee Doodle played before starting its programmes. The programme was broadcast via the BBC Ascencion Island Relay, at 1130 GMT the VOA programme in Spanish for South America began. Later in the recording you can also hear Radio Moscow's ID signal.