NIL HEARDRECEPTION LOG

Russian cluster beacons (MX)

tier B · keyed-tone

7038.3 kHz USB · 2026-10-04 20:50:31Z · 06:46 · received at Assen | Netherlands

Spectrogram of Russian cluster beacons (MX), 7038.3 kHz USB, 2026-10-04 20:50:31Z, 06:46: keyed-tone 48% · carrier 24% · morse 14% · mixed 10% · data 5% · tone 1781 Hz · keying 0.35 Hz depth 0.77
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse data carrier mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 7.1 MB ⤓ Opus 1690 kB { }
What was heard
keyed-tone 48% · carrier 24% · morse 14% · mixed 10% · data 5% · tone 1781 Hz · keying 0.35 Hz depth 0.77 — dominant tone 1781 Hz, keyed at 0.35 Hz (depth 0.77). 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 46 dB — thanks to the operator. Receivers
Provenance
sha256 5a89f572040c2d148c30a8f4400d216d689f12f3230d4df076f6e1e3d04e19e6
source 06:46 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-10-04T2050Z-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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