NIL HEARDRECEPTION LOG

Russian cluster beacons (MX)

tier B · keyed-tone

7038.3 kHz USB · 2026-09-21 18:43:20Z · 03:53 · received at Alvito, Italy 0-30 MHz Frequencies

Spectrogram of Russian cluster beacons (MX), 7038.3 kHz USB, 2026-09-21 18:43:20Z, 03:53: keyed-tone 33% · morse 33% · carrier 25% · data 8% · tone 1761 Hz · keying 0.35 Hz depth 0.80
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse data carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 4.2 MB ⤓ Opus 953 kB { }
What was heard
keyed-tone 33% · morse 33% · carrier 25% · data 8% · tone 1761 Hz · keying 0.35 Hz depth 0.80 — dominant tone 1761 Hz, keyed at 0.35 Hz (depth 0.8). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Alvito, Italy 0-30 MHz Frequencies (JN61vq) · G5RV Full Size Dir. N/S · reported SNR 41 dB — thanks to the operator. Receivers
Provenance
sha256 044f5b875b9cf8bd81c2e099167db835d88ee57b8ae0102d4943bfbab5689fb8
source 03:53 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-21T1843Z-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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