NIL HEARDRECEPTION LOG

Russian cluster beacons (MX)

tier B · carrier

7038.3 kHz USB · 2026-10-02 18:38:15Z · 04:04 · received at Assen | Netherlands

Spectrogram of Russian cluster beacons (MX), 7038.3 kHz USB, 2026-10-02 18:38:15Z, 04:04: carrier 62% · morse 38% · tone 1825 Hz · keying 0.25 Hz depth 0.73
spectrogram 0–6.0 kHz · analysis blocks: morse carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 4.3 MB ⤓ Opus 1029 kB { }
What was heard
carrier 62% · morse 38% · tone 1825 Hz · keying 0.25 Hz depth 0.73 — dominant tone 1825 Hz, keyed at 0.25 Hz (depth 0.73). 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 42 dB — thanks to the operator. Receivers
Provenance
sha256 fc2690e9da9e6f4bbfdf5f81510328625ca191ae5200056babb308f0afa95ee1
source 04:04 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-10-02T1838Z-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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