NIL HEARDRECEPTION LOG

Russian cluster beacons (MX)

tier B · keyed-tone

7038.3 kHz USB · 2026-09-25 17:28:21Z · 10:00 · received at Heppen, Limburg, Belgium

Spectrogram of Russian cluster beacons (MX), 7038.3 kHz USB, 2026-09-25 17:28:21Z, 10:00: keyed-tone 37% · carrier 33% · morse 30% · tone 1767 Hz · keying 0.25 Hz depth 0.84
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 9.5 MB ⤓ Opus 2319 kB { }
What was heard
keyed-tone 37% · carrier 33% · morse 30% · tone 1767 Hz · keying 0.25 Hz depth 0.84 — dominant tone 1767 Hz, keyed at 0.25 Hz (depth 0.84). 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 36 dB — thanks to the operator. Receivers
Provenance
sha256 e85c4a4ebdef911403aa65015d2d84edc3269c016be350f0d40bbaf2189f937d
source 10:00 WAV, 12000 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-25T1728Z-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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