Saturday, 19 May 2007

E25 live & playback transmission

At 1007z today, carrier and a 1000 Hz tone appeared, and an OM started calling "315", a rather rare ID. Then a 13-group message followed in AM mode:

3284 6390 4131 2962 0255 9232 9142 4133 8427 7405
2188 6390 7695

After the "End of message, end of transmission", the OM started calling again "315" at 1019z! The song "Arouh Le Min" heard at 1026z and then again the OM called "315" and the whole message delivery procedure was repeated. Here is the whole transmission. Signal was lower than usual.

After a little research, I proved that the operators decided to playback the message session. They did it again for Agent 315 in the past. I created a 2-channel audio file, putting in the Left channel the initial message and in the Right channel what I believed to be a playback. If the resulting stereo file sounded without echoes (=timing differences), the second repeat was indeed a playback. Only propagation differences should be present. Here is a short sample of the resulting stereo file. Do you notice any timing differences? I don't.

Second transmission:

E25 appeared again at 1126z, with the song "Arouh Le Min", calling "555" and sending the 13-group message:

9150 9121 3911 4428 3360 2388 1821 8231 9908 8180
7623 3911


A typical message which follows the guidelines of my article in Enigma2000 Newsletter #39. The transmission was in AM mode, with a stronger signal.

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