NIL HEARDRECEPTION LOG

Russian cluster beacons (MX)

tier B · keyed-tone

7038.3 kHz USB · 2026-10-06 04:27:02Z · 07:21 · received at Assen | Netherlands

Spectrogram of Russian cluster beacons (MX), 7038.3 kHz USB, 2026-10-06 04:27:02Z, 07:21: keyed-tone 48% · carrier 26% · data 13% · morse 9% · mixed 4% · tone 1819 Hz · keying 0.20 Hz depth 0.73
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse data carrier mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 7.7 MB ⤓ Opus 1838 kB { }
What was heard
keyed-tone 48% · carrier 26% · data 13% · morse 9% · mixed 4% · tone 1819 Hz · keying 0.20 Hz depth 0.73 — dominant tone 1819 Hz, keyed at 0.2 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 36 dB — thanks to the operator. Receivers
Provenance
sha256 a127aa4289f9af00ea14e2883d75a32c3a3f28560d07d64547c4be66d750db6e
source 07:21 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-10-06T0427Z-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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