NIL HEARDRECEPTION LOG

Russian cluster beacons (MX)

tier B · keyed-tone

7038.3 kHz USB · 2026-09-23 05:32:53Z · 02:19 · received at Brettnach F57320

Spectrogram of Russian cluster beacons (MX), 7038.3 kHz USB, 2026-09-23 05:32:53Z, 02:19: keyed-tone 57% · carrier 14% · data 14% · morse 14% · tone 1671 Hz · keying 0.20 Hz depth 0.73
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse data carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 2.4 MB ⤓ Opus 580 kB { }
What was heard
keyed-tone 57% · carrier 14% · data 14% · morse 14% · tone 1671 Hz · keying 0.20 Hz depth 0.73 — dominant tone 1671 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, Brettnach F57320 (JN39GG) · vertical · reported SNR 42 dB — thanks to the operator. Receivers
Provenance
sha256 52c2e4f7ce4e8235fe1613f9f45b6ba6d8ea3bf02e4a1a21763566d2e62c2142
source 02:19 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-23T0532Z-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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