NIL HEARDRECEPTION LOG

DWD Hamburg RTTY weather DDH7

tier A · mixed

7644.5 kHz USB · 2026-09-25 02:16:05Z · 06:07 · received at Brettnach F57320

Spectrogram of DWD Hamburg RTTY weather DDH7, 7644.5 kHz USB, 2026-09-25 02:16:05Z, 06:07: mixed 42% · data 32% · morse 26% · tone 1274 Hz · keying 13.31 Hz depth 0.88
spectrogram 0–6.0 kHz · analysis blocks: morse data mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 6.5 MB ⤓ Opus 1515 kB { }
What was heard
mixed 42% · data 32% · morse 26% · tone 1274 Hz · keying 13.31 Hz depth 0.88 — dominant tone 1274 Hz, keyed at 13.31 Hz (depth 0.88). 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 3e1580e7936a04ead0592341d9cc84b98f6b4a0738f6c885d4aef65b1da48d29
source 06:07 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-25T0216Z-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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