The output of Russian number station UVB-76 has increased dramatically over the past week or so. The station, which broadcasts from near Povarovo [on 4625 kHz AM with suppressed lower sideband], is known as “The Buzzer” by its listeners because of the short, monotonous buzz tone that it normally plays 21 to 34 times per minute. It’s only deviated from that signal three times previously - briefly in 1997, 2002 and 2006.In early August, a garbled recording of a voice speaking Russian was heard by listeners. A few days later, on 23 August at 13:35 UTC, a clearer voice read out the following message twice: “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″, before returning to its normal broadcasting.
Since then, a number of other distorted voices have appeared over the normal buzzing transmission, as well as knocks and shuffles, as if someone were moving things around inside the broadcasting room. It’s believed that the transmission site has an open microphone, which occasionally picks up sounds from technicians working within the broadcast site.
Additional story at: http://www.wired.co.uk/news/archive/2010-08/25/russian-numbers-station-broadcast-changes
(R Netherlands Media Network Weblog)