NIL HEARDRECEPTION LOG

Russian cluster beacons (MX)

tier B · keyed-tone

7038.3 kHz USB · 2026-09-20 02:51:47Z · 10:00 · received at Assen | Netherlands

Spectrogram of Russian cluster beacons (MX), 7038.3 kHz USB, 2026-09-20 02:51:47Z, 10:00: keyed-tone 53% · carrier 37% · mixed 7% · data 3% · tone 1471 Hz · keying 0.20 Hz depth 0.64
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone data carrier mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.6 MB ⤓ Opus 2468 kB { }
What was heard
keyed-tone 53% · carrier 37% · mixed 7% · data 3% · tone 1471 Hz · keying 0.20 Hz depth 0.64 — dominant tone 1471 Hz, keyed at 0.2 Hz (depth 0.64). 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 f8f8c4307d5e61f99b8b8ff73fee7cf59cc5f80d17cd484ba6a190ab0956c7f1
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-20T0251Z-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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