Russian cluster beacons (MX)

tier B · morse

7038.3 kHz USB · 2026-09-18 21:25:16Z · 04:00 · received at Heppen, Limburg, Belgium

Spectrogram of Russian cluster beacons (MX), 7038.3 kHz USB, 2026-09-18 21:25:16Z, 04:00: morse 50% · mixed 42% · carrier 8% · tone 1799 Hz · keying 4.32 Hz depth 0.80 — spectrogram 0–6.0 kHz · analysis blocks: morse carrier mixed

loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 3.7 MB ⤓ Opus 902 kB { }

What was heard

morse 50% · mixed 42% · carrier 8% · tone 1799 Hz · keying 4.32 Hz depth 0.80 — dominant tone 1799 Hz, keyed at 4.32 Hz (depth 0.8). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.

Receiver

KiwiSDR, Heppen, Limburg, Belgium (JO21oc) · Longwire 54m top 70m above sealevel · reported SNR 36 dB — thanks to the operator. Receivers

Provenance

sha256 8a1dd0de7b17f58b5dd6e45d2ef9540c3f304a84f464ef4235742400a53608e6
source 04:00 WAV, 12000 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-18T2125Z-7038.3-mx-7039

Heard in the record

— linked once the record exists.

Notes

rig: Single-letter CW beacons, cluster 7039.2-7039.4 kHz (D Sevastopol 7039.2, C Moscow 7039.3, P Kaliningrad 7039.4 per priyom/MX-profile). Dial 7038.3 USB -> letters at ~900-1100 Hz. Continuous propagation markers, not communications. https://priyom.org/military-stations/russia/single-letter-beacons

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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