NIL HEARDRECEPTION LOG

DWD Hamburg RTTY weather DDH7

tier A · data

7644.5 kHz USB · 2026-09-21 09:02:50Z · 04:20 · received at Montmorillon 86500 FRANCE

Spectrogram of DWD Hamburg RTTY weather DDH7, 7644.5 kHz USB, 2026-09-21 09:02:50Z, 04:20: data 92% · morse 8% · tone 1333 Hz · keying 23.32 Hz depth 0.87
spectrogram 0–6.0 kHz · analysis blocks: morse data
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 4.7 MB ⤓ Opus 1101 kB { }
What was heard
data 92% · morse 8% · tone 1333 Hz · keying 23.32 Hz depth 0.87 — dominant tone 1333 Hz, keyed at 23.32 Hz (depth 0.87). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Montmorillon 86500 FRANCE (JN05ot) · Antenna Shared Apex SAL 30 array solution · reported SNR 38 dB — thanks to the operator. Receivers
Provenance
sha256 52fd6bac0bbcfc033d05df52c665b18de4063d3e3aaee37d0db75481b4532a26
source 04:20 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-21T0902Z-7644.5-rtty-7646
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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