priyom.org

M40

Enigma ID M40

Name
Frequencies
Status Inactive
Voice N/A
Emission mode ICW
Location North Korea
Activity pages

Known counterpart stations

M40 was transmitted from North Korea. Very frequent transmissions while it was active. Regular transmissions ceased in October 2003.

The transmission format is given below. The speed was 20 words per minute. One dash was used for zero.

Preamble Message Repeat Outro
VVV CQ 747.343 HR 46 BT BT 71841 80146 47834 ... AR AR RPT RPT VVV CQ 343 HR 46 BT BT 71841 80146 47834 ... AR AR SK SK
  3-figure station ID + 3-figure recipient ID   Amount of 5-figure groups in the message   5-figure single groups       3-figure recipient ID   Amount of 5-figure groups in the message   5-figure single groups    
Repeated thrice Repeated thrice Repeated twice Repeated twice         Repeated thrice Repeated thrice Repeated twice Repeated twice        
Repeated for 5 minutes

In 1999, M40 operated on the following schedule. First transmissions were made on the full hour, then repeated 30 minutes later. The frequencies were changed seasonally. All schedules were daily, except where noted.

ID UTC/kHz UTC/kHz Months
CQ 113 14:00 16:00 14:30 16:30  
5150 4700 Nov, Dec, Jan, Feb
5590 6630 Mar, Apr, Sep, Oct
5810 8210 May, Jun, Jul, Aug
CQ 466 15:00 16:00 15:30 16:30  
4660 5650 Nov, Dec, Jan, Feb
5150 5810 Mar, Apr, Sep, Oct
5650 6870 May, Jun, Jul, Aug
CQ 466 06:30         Tue/Wed/Thu only
8110       Mar, Apr, Sep, Oct
8620       May, Jun, Jul, Aug
CQ 432 14:00 15:00 14:30 15:30  
5535 4600 Nov, Dec, Jan, Feb
CQ 974 14:00 15:00 14:30 15:30  
5535 6750 Mar, Apr, Sep, Oct
CQ 863 14:00 15:00 14:30 15:30  
5535 7400 May, Jun, Jul, Aug
CQ 735 16:00 16:30      
5190 5900     May, Jun, Jul, Aug
CQ 515 17:00 17:30      
12300 16100     all
CQ 707 16:30      
4670 5200     Mar, Apr, Sep, Oct
CQ 909 16:30      
5670 6425     May, Jun, Jul, Aug
CQ 295 16:30        
5210       Mar, Apr
CQ 616 23:00 23:30       4th, 5th, 20th, 21st day of the month only
8110 8880     all

And also "CQ 747" at 09:00, 10:00 and 20:00 on 10620kHz, and at 09:30, 10:30 and 20:30 on 12948kHz. "747" and "515" were the only ID's audible in Europe.

[Based on Numbers & Oddities #18 and #19, and ENIGMA Control List]

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