NIL HEARDRECEPTION LOG

DWD Hamburg RTTY weather DDH7

tier A · mixed

7644.5 kHz USB · 2026-09-20 04:58:33Z · 10:00 · received at Brettnach F57320

Spectrogram of DWD Hamburg RTTY weather DDH7, 7644.5 kHz USB, 2026-09-20 04:58:33Z, 10:00: mixed 30% · data 30% · carrier 17% · keyed-tone 13% · morse 10% · tone 1348 Hz · keying 0.25 Hz depth 0.89
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse data carrier mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.5 MB ⤓ Opus 2554 kB { }
What was heard
mixed 30% · data 30% · carrier 17% · keyed-tone 13% · morse 10% · tone 1348 Hz · keying 0.25 Hz depth 0.89 — dominant tone 1348 Hz, keyed at 0.25 Hz (depth 0.89). 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 43 dB — thanks to the operator. Receivers
Provenance
sha256 dc9e12b8906cb810e23271a9453cf8d669f11fb197f2a8f72d64907cd416594e
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-20T0458Z-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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