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M05

Enigma ID M05

Name The Two-Day Wonder
Frequencies 2688, 3130, 4044, 4620, 5207, 7883, 9240
Status Inactive
Voice N/A
Emission mode MCW
Location ?
Activity pages

Known counterpart stations

M05 was a station that was only heard for two days - on October 5th and 6th, 1993 - possibly linked to the Moscow coup attempt. Very strong signal strengths reported by British monitors suggest the UK as the country of origin.

The Morse code pitch was 800 Hz. The speed was described as very slow. Standard five dashes were used for zero. The transmission format was complex; for most of the time, sets of 6-figure groups were sent, followed by "000000/". Example sets:

520768 996868 960822 345570 000000/
665804 825770 480472 561742 000000/
570976 644864 804199 314468 000000/

The sets would have been repeated for anywhere between 30 minutes and a few hours. Note the sequences of repeated digits in groups. Occasionally either "K", "KK" or "KKK" preceded the sets.

M05 operated 23 hours a day, on the following schedule:

Starting UTC Ending UTC Frequency #1 Frequency #2
01:00 08:00 4044 kHz 4620 kHz
08:00 14:00 7883 kHz 9240 kHz
15:00 19:00 4620 kHz 5207 kHz
19:00 24:00 2688 kHz 3130 kHz

References

ENIGMA Newsletter #7 (January 16th, 1995), p. 36 - read a scanned version here

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