Russian cluster beacons (MX)

tier B · morse

7038.3 kHz USB · 2026-10-05 21:08:16Z · 10:00 · received at Assen | Netherlands

Spectrogram of Russian cluster beacons (MX), 7038.3 kHz USB, 2026-10-05 21:08:16Z, 10:00: morse 43% · carrier 27% · keyed-tone 17% · data 13% · tone 1799 Hz · keying 0.40 Hz depth 0.79 — spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse data carrier

loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.5 MB ⤓ Opus 2465 kB { }

What was heard

morse 43% · carrier 27% · keyed-tone 17% · data 13% · tone 1799 Hz · keying 0.40 Hz depth 0.79 — dominant tone 1799 Hz, keyed at 0.4 Hz (depth 0.79). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.

Receiver

KiwiSDR, Assen | Netherlands (JO32fx) · Active Loop antenna PAHGOR (serial nr: 001) built by ► PA0EBC ◀ 👍 · reported SNR 44 dB — thanks to the operator. Receivers

Provenance

sha256 dba2480ad07e74aecda3449053c241aa974ceeefcbcb4ee6e34c1d77916528dd
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-10-05T2108Z-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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