NIL HEARDRECEPTION LOG

Russian cluster beacons (MX)

tier B · keyed-tone

7038.3 kHz USB · 2026-09-22 19:14:01Z · 03:12 · received at Brettnach F57320

Spectrogram of Russian cluster beacons (MX), 7038.3 kHz USB, 2026-09-22 19:14:01Z, 03:12: keyed-tone 50% · carrier 30% · morse 20% · tone 1728 Hz · keying 0.30 Hz depth 0.62
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 3.3 MB ⤓ Opus 819 kB { }
What was heard
keyed-tone 50% · carrier 30% · morse 20% · tone 1728 Hz · keying 0.30 Hz depth 0.62 — dominant tone 1728 Hz, keyed at 0.3 Hz (depth 0.62). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Brettnach F57320 (JN39GG) · vertical · reported SNR 41 dB — thanks to the operator. Receivers
Provenance
sha256 c1474474d35f37015c61b67e2213a9aa3c89eac32663d603e12076d709ed140b
source 03:12 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-22T1914Z-7038.3-mx-7039
Heard in the record
— linked once the record exists.
Licence
CC BY 4.0 — credit NIL HEARD / Reception Log. The recording is ours; the transmission is somebody else's. Descriptions describe sound, never content — why.
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