UVB-76 is the callsign of a shortwave radio station that usually broadcasts on the frequency 4625 kHz (AM full carrier). It's known among radio listeners by the nickname The Buzzer. It features a short, monotonous buzz tone, repeating at a rate of approximately 25 tones per minute, for 24 hours per day. The station has been observed since around 1982. On rare occasions, the buzzer signal is interrupted and a voice transmission in Russian takes place. Only three to four such events have been noted.
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By: jbottero


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@ 2010-08-26 08:09:13
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@ 2011-09-22 13:48:54
There is a related article, "ENIGMA," by Peter Savodnik, in the October 2011 issue of WIRED magazine.

After 2010, the transmitter is believed to have relocated to Pskov, according to