NIL HEARDRECEPTION LOG

Russian cluster beacons (MX)

tier B · carrier

7038.3 kHz USB · 2026-09-26 17:30:43Z · 06:36 · received at Heppen, Limburg, Belgium

Spectrogram of Russian cluster beacons (MX), 7038.3 kHz USB, 2026-09-26 17:30:43Z, 06:36: carrier 50% · keyed-tone 25% · morse 20% · data 5% · tone 2628 Hz · keying 0.25 Hz depth 0.99
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse data carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 6.8 MB ⤓ Opus 1681 kB { }
What was heard
carrier 50% · keyed-tone 25% · morse 20% · data 5% · tone 2628 Hz · keying 0.25 Hz depth 0.99 — dominant tone 2628 Hz, keyed at 0.25 Hz (depth 0.99). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Heppen, Limburg, Belgium (JO21oc) · Longwire 54m top 70m above sealevel · reported SNR 38 dB — thanks to the operator. Receivers
Provenance
sha256 a59ef3820c416d9eeceabdbcb9e6cf1ce815215014e52885f59cede2d370170a
source 06:36 WAV, 12000 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-26T1730Z-7038.3-mx-7039
Heard in the record
Reception Conditions Were Poor — “Spruchnummer”
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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