Numbers Stations: A Bad Day to be a Cuban Spy
By Thomas, The SWLing Post
While band scanning last Sunday (September 8, 2014) I stumbled upon the Cuban numbers station HM01 on 11,530 kHz at 17:30 UTC.
It’s always intriguing to hear shortwave numbers stations, but I prefer those that stick to pure vocal number strings;
 HM01 has numbers with digital bursts between number sets, which is a 
more fatiguing listening experience.  Nonetheless, I kept it playing in 
the background as I tooled around the radio room Sunday afternoon, 
putting away supplies from my recent three week road trip.
"The lack of any accent in the voice of the Atención station was 
explained in December by Jorge García Vázquez, a Cuban in Berlin who has
 been researching the links between Havana and the STASI, the former 
East Germany’ intelligence service. A Jan. 10 1977 letter in the 
STASI archives shows Cuban intelligence Maj. Eddy Herrera had requested 
the equipment for a numbers station, preloaded with the Spanish words 
for one through zero, Attention, Goodbye and Final, Garcia Vasquez 
reported.."