HFU HF Underground

Loggings => HF Mystery Signals => Topic started by: ~SIGINT~ on July 28, 2023, 0519 UTC

Title: MFA Moscow - X06 15920 USB 0510 UTC 28 JUL 2023
Post by: ~SIGINT~ on July 28, 2023, 0519 UTC

MFA Moscow - X06 15920.0 kHz USB 05:10 UTC 28 JUL 2023

05:10 UTC - MFA Moscow - X06 Russian Diplomatic Service with 6 repeating proprietary selective calling system tones; transmitting in USB with AM carrier (AME). Good readable;
05:22 UTC - Loud and clear on the University of Twente Wide-band WebSDR;
05:23 UTC - Transmission ended.

Tone Sequence (Hz): 815, 845, 875, 910, 950, 990 (test sequence)

MFA Moscow - X06
https://priyom.org/diplomatic-stations/russia/x06 (https://priyom.org/diplomatic-stations/russia/x06)

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RSPduo | Barker & Williamson T2FD antenna

Title: Re: UNID 15920 USB 0510 UTC 28 JUL 2023
Post by: tiNG on July 28, 2023, 1027 UTC

Hi.

Seems to be Russian MFA Moskau with its "Mazielka" X06.

Selcall to embassy for following transmissions in either Serdolik, Perelivt or OFDM-45 on another frequency.

Hope this helps.

Title: Re: MFA Moscow - X06 15920 USB 0510 UTC 28 JUL 2023
Post by: ~SIGINT~ on July 29, 2023, 0156 UTC

Hello Thomas,

That signal is precisely what I heard. I had looked on Priyom for the frequency and had come up empty. I guess I was looking in the wrong place. Interesting proprietary selective calling system.

I played the audio recording back through Spectrum Lab for analysis and the tone sequence matches.
Tone Sequence (Hz): 815, 845, 875, 910, 950, 990 (test sequence)

MFA Moscow - X06
https://priyom.org/diplomatic-stations/russia/x06 (https://priyom.org/diplomatic-stations/russia/x06)

Original post updated and thank you for the ID.