Voice of Vietnam interval signal

"This was recorded on 11,885 kHz, July 24, 2021 at 19:00 UTC in McGrath, Alaska."

Recorded by Paul Walker, courtesy of the Shortwave Radio Archive.

Part of the Shortwave Transmissions project, documenting and reimagining the sounds of shortwave radio - find out more and see the whole project at https://citiesandmemory.com/shortwave