NIL HEARDRECEPTION LOG

Russian cluster beacons (MX)

tier B · carrier

7038.3 kHz USB · 2026-10-06 18:31:21Z · 10:00 · received at Hamburg, Drage, 🇩🇪 Germany 🇩🇪

Spectrogram of Russian cluster beacons (MX), 7038.3 kHz USB, 2026-10-06 18:31:21Z, 10:00: carrier 53% · keyed-tone 23% · morse 20% · data 3% · tone 1840 Hz · keying 0.20 Hz depth 0.77
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse data carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.5 MB ⤓ Opus 2564 kB { }
What was heard
carrier 53% · keyed-tone 23% · morse 20% · data 3% · tone 1840 Hz · keying 0.20 Hz depth 0.77 — dominant tone 1840 Hz, keyed at 0.2 Hz (depth 0.77). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Hamburg, Drage, 🇩🇪 Germany 🇩🇪 (JO53dk) · VLF broadband vertical V1.2 08/26 · reported SNR 41 dB — thanks to the operator. Receivers
Provenance
sha256 91e93ebbf51db5e2fe8040e42c56bc1eddea7b4977fc18d66bdec59cc4ecef34
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-10-06T1831Z-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.
Related