NIL HEARDRECEPTION LOG

Russian cluster beacons (MX)

tier B · keyed-tone

7038.3 kHz USB · 2026-09-26 22:40:44Z · 10:00 · received at Assen | Netherlands

Spectrogram of Russian cluster beacons (MX), 7038.3 kHz USB, 2026-09-26 22:40:44Z, 10:00: keyed-tone 67% · data 20% · carrier 13% · tone 806 Hz · keying 0.20 Hz depth 0.99
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone data carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.4 MB ⤓ Opus 2555 kB { }
What was heard
keyed-tone 67% · data 20% · carrier 13% · tone 806 Hz · keying 0.20 Hz depth 0.99 — dominant tone 806 Hz, keyed at 0.2 Hz (depth 0.99). 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 43 dB — thanks to the operator. Receivers
Provenance
sha256 3111569cc3df51a975105220f7e89deae8531596f836269ec0b50fd16975d731
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-26T2240Z-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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