A recording I made back in 2019 of Cuba's HM01 numbers station.




"A numbers station is a shortwave radio station characterized by broadcasts of formatted numbers, which are believed to be addressed to intelligence officers operating in foreign countries. Most identified stations use speech synthesis to vocalize numbers, although digital modes such as phase-shift keying and frequency-shift keying, as well as Morse code transmissions, are not uncommon. Most stations have set time schedules, or schedule patterns; however, other stations appear to have no discernible pattern and broadcast at random times. Stations may or may not have set frequencies in the high frequency band."
https://en.wikipedia.org/wiki/Numbers_station


[Linked Image from short-wave.info]
Broadcast frequencies and times for HM01:
https://www.short-wave.info/index.php?station=Cuban%20Spy%20Numers

Cheers! Bob F.


"Whose bright idea was it to put every idiot in the world in touch with every other idiot? It's working!" -- P. J. O'Rourke