UVB-76 The Buzzer 4625 kHz

UVB-76, also known by the nickname "The Buzzer", is a shortwave radio station that broadcasts on the frequency of 4625 kHz. It broadcasts a short, monotonous About this soundbuzz tone, repeating at a rate of approximately 25 tones per minute, 24 hours per day. Sometimes, the buzzer signal is interrupted and a voice transmission in Russian takes place. The start date of broadcasting is disputed. However, it was allegedly reported to have started broadcasting in 1982.

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[frostbirdyt]

I realized uvb-76 is in Saint Petersburg