Interference over the UVB-76 frequency

 Frequency: 4625 kHz.

Pirate radio operators have been increasingly interfering with the UVB-76 frequency at night using music, whistling, and conversations.

Pirate radio operators have recently begun appearing more frequently on the 4625 kHz frequency, home to the shortwave station UVB-76. They play music, talk to one another, and create interference over the main signal, 

according to a radio monitoring researcher who runs the "UVB-76 Efir" Telegram channel-which broadcasts the station 24/7 and publishes its messages.

According to radio enthusiasts, the most active offender is the Russian-speaking "Kilohertz." "RC4," "E12," and "Sneg-05" also appear on the frequency. The extraneous signal may sound like music, whistling, or hissing, and sometimes multiple participants engage in open radio exchanges.

"The pirates' disruptive behavior is immediately noticeable because an extraneous radio signal appears on the frequency-which could be music, whistling, or hissing-while sometimes several radio hooligans conduct open conversations with each other, and some use digital modulation modes to overlay patterns and images onto the spectrogram (a visual representation of the signal - Ed.)," the researcher explained.

The pirates have their own habits. For example, before going off-air, "Kilohertz" invariably plays Viktor Tsoi's song "Quiet Night." Other participants greet listeners and wish them a good evening, or-conversely-simply switch on the music and display images on the spectrogram without a word.

https://vk.ru/radioreceiver)

(RUS-DX)

UVB-76 Russian Enigma S28 Buzzer Update

And from the SCAN-DC newsgroup via the BTown Monitoring Post blog at http://monitor-post.blogspot.com/.

UVB-76 is the callsign 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, 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 four to five such events have been noted. Despite much speculation, the actual purpose of this station remains unknown to the public, but is probably used for relaying military orders. There has been a spike in activity as of late August, 2010. More details on the spike below:

http://en.wikipedia.org/wiki/UVB-76#August_2010

Here is the latest intercepts from the Wikipeda link above:

August 2010
There has been a spike in activity on UVB-76 in August 2010. Following messages have been detected by listeners:

On August 20, 2010 at 05:11 UTC, a garbled voice speaking Russian, was detected by amateur listeners. It made a short message with 56° 5'8.23"N little interference and then repeated itself with noticeably more static. This followed recent activity on the station tha little interference and then repeated itself with noticeably more static. This followed recent activity on the station that included more static than usual and several instances of objects being moved/dropped. All of this was detected by amateur listeners and is unconfirmed at the moment.

On August 23, 2010 at 13:35 UTC, a voice speaking in Russian was detected. The voice read out a single, short transmission several times before the line went dead, then returned to its normal broadcast. As the message was transmitted on upper side-band, reception with ordinary AM receivers was weak and distorted.
The message, repeated twice, was: UVB-76, UVB-76 — 93 882 naimina 74 14 35 74 — 9 3 8 8 2 nikolai, anna, ivan, michail, ivan, nikolai, anna, 7, 4, 1, 4, 3, 5, 7, 4[11] (recording of the August 23 2010 voice transmission)

On August 24, 2010 at approximately 04:00 UTC, a heavily distorted voice was heard by amateur listeners.

On August 24, 2010 at 13:25 UTC, another heavily distorted voice was detected by several amateur listeners.

On August 24, 2010 at 17:43 UTC, Hard to hear voices were heard over the transmission.

On August 24, 2010 at around 03:30 UTC, distorted voices in addition to fast beeps and pulses were heard.

On August 25, 2010 around 06:13 UTC, Random knocks or shuffles as if someone is in the room, changes in tone randomly.

On August 25, 2010 at 11:53 GMT the following message was detected: "August 3 5 2 7 Accretion 3 6 0 9 5 6 7 3". A recording is available here mirror Said message is a Google Translate of 3 8 5 2 7 ???????? 3 6 0 9 5 6 7 3. This is identical to the August 25, 2010 06:54 UTC message mentioned below.

On August 25, 2010 at 06:45 UTC, A grumble or garbled sound appeared out of nowhere for 389 ms.

On August 25, 2010 at 06:54 UTC, Another transmission occurred. (Recording of the fifth voice transmission) A new sequence/pattern with a chirping/crank noise occured on top of the previous buzzer. At times this new noise made the old buzzing noise barely audible.The message content was: "UVB-76. UVB-76. 38, 527. ????????. 36, 09, 55, 73.".

On August 25, 2010 at 18:07 UTC, Morse code could be heard behind the buzzer signal. It lasted until approximately 18:20 UTC. At approximately 18:08 UTC A tone was heard in the background followed by a short message.

There is a lot of very interesting additional details at the Wikipedia website above.

Also courtesy of the Spooks list and Jakon Hays, the following associated links:

Saw a post on MeFi this morning about it.
http://www.metafilter.com/95091/4625-kHz

Which cites this site.
http://uvb-76.blogspot.com/2010/08/august-23-2010-935am-pst-voice.html

The wiki page has been updated quite a bit though the day.
http://en.wikipedia.org/wiki/UVB-76

And there is a live stream here.
http://www.justin.tv/rampageturke#/w/340896016/4