T marker

Enigma ID None

Name T marker
Frequencies 4182
Status Active
Voice Male and female, live
Emission mode USB
Location Russia

Russian (icon)

Activity pages

Download audio sample

Known counterpart stations

This is a Russian military commandment network serving the Western Military District, mostly noticeable by its channel marker sending intermittent tone dashes (like the Morse code character "T"). Over the years, only very rare messages and test counts have been heard on it. The messages were of the "Monolith" format and used the callsign Osnova-48 (Russian: Основа-48).

April 5th, 2018 15:57
  • 4182 kHz
  • J3E (USB)
Osnova-48 /Основа-48


ILLYuSTRATOR 8708 7328



The channel marker was first heard on 4524 kHz in July 2015. It disappeared later that year, only to return on the same frequency nearly two years later, on April 11, 2017. On April 4, 2018, it moved to 4182 kHz. From July 26 to 30, 2018, as well as from August 30 to September 12, 2018, it temporarily transmitted on 4593 kHz instead, before returning to 4182 kHz. In the morning of October 27, 2018, the marker moved to 4223 kHz, only to return to 4182 kHz in the morning two days later.

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