NIL HEARDRECEPTION LOG

DWD Hamburg RTTY weather DDH7

tier A · data

7644.5 kHz USB · 2026-09-21 03:15:30Z · 08:41 · received at Assen | Netherlands

Spectrogram of DWD Hamburg RTTY weather DDH7, 7644.5 kHz USB, 2026-09-21 03:15:30Z, 08:41: data 70% · carrier 11% · morse 7% · mixed 7% · keyed-tone 4% · tone 1274 Hz · keying 0.81 Hz depth 0.90
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse data carrier mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 9.1 MB ⤓ Opus 2185 kB { }
What was heard
data 70% · carrier 11% · morse 7% · mixed 7% · keyed-tone 4% · tone 1274 Hz · keying 0.81 Hz depth 0.90 — dominant tone 1274 Hz, keyed at 0.81 Hz (depth 0.9). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Assen | Netherlands (JO32fx) · Active Loop antenna PAHGOR (serial nr: 001) built by ► PA0EBC ◀ 👍 · reported SNR 41 dB — thanks to the operator. Receivers
Provenance
sha256 74095d05770f35894d197f5ba080187d47f4f92988dc31ffdba36ba956e6d861
source 08:41 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-21T0315Z-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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