UZB76 (sometimes referred to as UVB76, but recently MDZhB) is the call sign of a shortwave radio station that usually broadcasts on the frequency 4625 kHz (AM suppressed lower sideband). It is known among radio listeners by the nickname The Buzzer. It features a short, monotonous
buzz tone (help·info),
repeating at a rate of approximately 25 tones per minute, for 24 hours
per day. The station has been observed since around 1982.[1] On rare occasions, the buzzer signal is interrupted and a voice transmission in Russian takes placeThe Conet Project
The Conet Project: Recordings of Shortwave Numbers Stations is a four-CD set of recordings of numbers stations, mysterious shortwave radio stations of uncertain origin believed to be operated by government agencies to communicate with spies "in the field".
mas info:
