Russian cluster beacons (MX)

tier B · morse

7038.3 kHz USB · 2026-09-20 05:09:02Z · 10:00 · received at Brettnach F57320

Spectrogram of Russian cluster beacons (MX), 7038.3 kHz USB, 2026-09-20 05:09:02Z, 10:00: morse 43% · keyed-tone 23% · data 17% · carrier 13% · mixed 3% · tone 1233 Hz · keying 0.25 Hz depth 0.99 — spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse data carrier mixed

loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.1 MB ⤓ Opus 2684 kB { }

What was heard

morse 43% · keyed-tone 23% · data 17% · carrier 13% · mixed 3% · tone 1233 Hz · keying 0.25 Hz depth 0.99 — dominant tone 1233 Hz, keyed at 0.25 Hz (depth 0.99). 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 43 dB — thanks to the operator. Receivers

Provenance

sha256 6a4301f62ea8ca1458ec7e63ec6082bff35e6895396ce780cc1d4789e4f88973
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-20T0509Z-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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