HMO1 Cuba Spy Numbers 11635 khz am @0520utc
Nice four minutes of the start of HM01, a Cuban “Spy Numbers” broadcast featuring a traditional female announcer with switch to data using Winradio Excalibur pro and wire antenna. QTH is Tampa Florida and as you can hear, the signal strength is really strong.
Standard voice pattern begins at 27 second mark, only to be repeatedly intermixed with what sounds like digital bursts.
Havana continues to communicate with its spies aground the world using low-tech, but highly effective High Frequency (HF) radio broadcasts. Commonly known as “shortwave radio,” Cuban agents and their spymasters receive these broadcasts on a shortwave radio and then type the numeric groups onto a laptop computer using a special disk to decrypt the HF broadcast.
To listen to a agent broadcast intercepted by a shortwave radio operator earlier today, click here: http://www.youtube.com/watch?v=n67NBHpaDrQ
Editor’s Note: For more on Havana’s communications techniques, see these Cuba Confidential posts: “Cuban Agent Communications: [The] Failure of a Perfect System, “ July 3, 2012, http://cubaconfidential.wordpress.com/2012/07/03/cuban-agent-communications-the-failure-of-a-perfect-system/ and “Numbers Station Spies on 40 Meters,” July 1, 2012, http://cubaconfidential.wordpress.com/2012/07/01/1660/