NIL HEARDRECEPTION LOG

Russian cluster beacons (MX)

tier B · keyed-tone

7038.3 kHz USB · 2026-09-19 03:08:23Z · 10:00 · received at Assen | Netherlands

Spectrogram of Russian cluster beacons (MX), 7038.3 kHz USB, 2026-09-19 03:08:23Z, 10:00: keyed-tone 37% · carrier 33% · morse 30% · tone 1790 Hz · keying 0.20 Hz depth 0.78
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.5 MB ⤓ Opus 2504 kB { }
What was heard
keyed-tone 37% · carrier 33% · morse 30% · tone 1790 Hz · keying 0.20 Hz depth 0.78 — dominant tone 1790 Hz, keyed at 0.2 Hz (depth 0.78). 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 39 dB — thanks to the operator. Receivers
Provenance
sha256 90b6ba2ba82fb83667d4640468efc47081f491c8a5aa25116fc3f04c501d5d7e
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-19T0308Z-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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