Visit http://mailman.qth.net/mailman/listinfo/spooks to unsubscribe from this list
>Another possibility is that the messages were being transmitted using a >fairly simple digital mode - something along the lines of x milliseconds >of tone for a mark, and x milliseconds of carrier-only for a space. >While I'm not aware of anyone actively doing this, it would go some way >towards explaining the clicking noises. Could be. But I think the simplest explanation is that they were using a numbers station and format already known to shortwave listeners. In 2006, the FBI had a look around the spies' Seattle apartment. The fact that messages were being recorded in an apartment at all means that the station used is probably not DX for North America. The spiral notebook with blocks of random numbers means hand copy. The FBI complaint mentions a 2009 intercept for the spies instructing them to "prepare the radio equipment" for "test RGs". That sounds more complicated than hand copy from a portable radio. Based on the FBI's definition of an radiogram, as quoted by Paul, that would mean the digital RGs began between 2006 and 2009 and were probably still experimental. ______________________________________________________________ Spooks mailing list Home: http://mailman.qth.net/mailman/listinfo/spooks Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
