Interval signals and audio archives:
DX logs from a longer period of time in Russian (including many sound files)
Voices Of Distant Countries
Interval Signals Online
Irkutsk DX Circle
NDXC Audio Archives
SOUNDS OFF THE WIRELESS
A HISTORICAL ARCHIVE
Exotic Sounds
Sito stazione di radioamatore HB9GCE
Sound Library
Radio Stations around the world
Registrazioni dalla radio
Historische Radio-Sendungen
Digital Modes Samples
IARU Region 1 Monitoring System Soundfiles
Remembering Radio Interval Signals - Radio Sounds Familiar
Shortwave Radio Interval Signals 1976-77
Quebec DX
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