NIL HEARDRECEPTION LOG

Russian cluster beacons (MX)

tier B · keyed-tone

7038.3 kHz USB · 2026-09-24 18:20:15Z · 02:00 · received at Hamburg, Germany, 33m T2FD

Spectrogram of Russian cluster beacons (MX), 7038.3 kHz USB, 2026-09-24 18:20:15Z, 02:00: keyed-tone 67% · carrier 17% · data 17% · tone 1705 Hz · keying 0.23 Hz depth 0.84
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone data carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 2.1 MB ⤓ Opus 500 kB { }
What was heard
keyed-tone 67% · carrier 17% · data 17% · tone 1705 Hz · keying 0.23 Hz depth 0.84 — dominant tone 1705 Hz, keyed at 0.23 Hz (depth 0.84). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Hamburg, Germany, 33m T2FD (JO53CK) · T2FD · reported SNR 37 dB — thanks to the operator. Receivers
Provenance
sha256 8f2f89ce09b13a669ef0ac4ab81c255672039b2995f53ffd2b7ef080cbc32571
source 02:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-24T1820Z-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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