S18 – Czech Lady / Czech Man

S18 was a rare Czech numbers station that had no set times or frequencies.  It’s message format makes it seem like it could just be a control station or a test.  It originally had a woman’s voice, but switched to a mans voice when it was reactivated in 2004 after a long period of absence.

Message Format

237 237 237 67004 67004 67004 “Konec Konec”
3-figure ID
(Repeated 3x)
5-figure message groups
(Repeated 3x)
Repeated 5x

Station Summary

Nickname: Czech Lady / Czech Man
Emission mode:
Voice Summary:
Originally had an automated man’s voice, then switched to female.
Believed Country of Origin:
Czechoslovakia/Czech Republic
Family Relatives: S17, S19, M39(?)
Station Family:
Family 9 Subfamily C “Czech”


ENIGMA Active Stations List V1.3, Page 33