S04 was a Bulgarian SIA numbers station first spotted in the 1980’s. Like the other Bulgarian Edna Sednitzer stations, S04 went through a long period of inactivity. It reappeared again in November 1999, transmitting only on one schedule until it went inactive in February / March 2006.
It transmitted on 3373 kHz LSB on the second Monday and Tuesday of the month at 22:45 UTC with ID 537 and serial number 342. Then from March to October the next year, the time changed to 21:45 UTC and transmitted on 3868 kHz. It was also heard on the first Monday or Tuesday in rare cases.
Message Recording
S04 Numbers Pronunciation
| Number | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|
| Pronunciation | Nùla | Ednà | Dvoika | Tri | Chètiri | Petorka | Shest | Sèdnitsa | Òsem | Dèvet |
Message Format
The serial number increased by 1 for every new message.
| Preamble | Message | Repeat | Outro | |||||
|---|---|---|---|---|---|---|---|---|
| 286 | Nomer 208 | Grupi 32 | 10934 84372 12804 … | 286 | Nomer 208 | Grupi 32 | 10934 84372 12804 … | 0 0 0 |
| 3-digit ID | Message serial number |
Group count | 5-digit message groups | 3-digit ID | Message serial number |
Group count | 5-digit message groups | |
| Repeated for 5 minutes | Repeated for 1 minute | |||||||
Numbers Station Summary
Nickname: Edna Sednitzer
Activity: Inactive (see station summary)
Emission mode: Possibly AM or LSB
Voice Summary: Slow speaking woman. Possibly automated.
Believed Country of Origin: Bulgaria
Family Relatives: E18, G22, M13
Station Family: Family 15 “Edna Sednitzer”
Sources
ENIGMA Active Stations List V1.3, Page 32
ENIGMA Newsletter Issue #18 (January 2000), Page 11
