Russian cluster beacons (MX)

tier B · carrier

7038.3 kHz USB · 2026-09-23 19:11:30Z · 05:44 · received at Assen | Netherlands

Spectrogram of Russian cluster beacons (MX), 7038.3 kHz USB, 2026-09-23 19:11:30Z, 05:44: carrier 44% · morse 39% · data 17% · tone 1808 Hz · keying 1.45 Hz depth 0.74 — spectrogram 0–6.0 kHz · analysis blocks: morse data carrier

loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 6.1 MB ⤓ Opus 1416 kB { }

What was heard

carrier 44% · morse 39% · data 17% · tone 1808 Hz · keying 1.45 Hz depth 0.74 — dominant tone 1808 Hz, keyed at 1.45 Hz (depth 0.74). 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 41 dB — thanks to the operator. Receivers

Provenance

sha256 58eea5d7b50dc060a583399e887627fc9be40e0f94cf83e3882891fb9073585a
source 05:44 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-23T1911Z-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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