NIL HEARDRECEPTION LOG

Russian cluster beacons (MX)

tier B · mixed

7038.3 kHz USB · 2026-09-18 23:28:53Z · 05:17 · received at Brettnach F57320

Spectrogram of Russian cluster beacons (MX), 7038.3 kHz USB, 2026-09-18 23:28:53Z, 05:17: mixed 44% · carrier 31% · keyed-tone 25% · tone 1854 Hz · keying 0.23 Hz depth 0.77
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone carrier mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 5.6 MB ⤓ Opus 1314 kB { }
What was heard
mixed 44% · carrier 31% · keyed-tone 25% · tone 1854 Hz · keying 0.23 Hz depth 0.77 — dominant tone 1854 Hz, keyed at 0.23 Hz (depth 0.77). 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 41 dB — thanks to the operator. Receivers
Provenance
sha256 b7baf203ce460106e04a160cb8dec2cbf39bad485016bfdd55e95ddc1e13195d
source 05:17 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-18T2328Z-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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