UVB-76

UVB-76 (sometimes referred to as UZB-76, 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 , repeating at a rate of approximately 25 tones per minute, for 24 hours per day. The station has been observed since around 1982.

Normal transmission

The station transmits a buzzing sound that lasts 1.2 seconds, pausing for 1–1.3 seconds, and repeating 21–34 times per minute. Until November 2010, the buzz tones lasted approximately 0.8 seconds each.

The Buzzer has apparently been broadcasting since at least 1982 as a repeating...
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