NIL HEARDRECEPTION LOG

M23 slow morse, evening slot

tier B · mixed

4879.2 kHz USB · 2026-09-20 18:56:38Z · 03:03 · received at Heppen, Limburg, Belgium

Spectrogram of M23 slow morse, evening slot, 4879.2 kHz USB, 2026-09-20 18:56:38Z, 03:03: mixed 100%
spectrogram 0–6.0 kHz · analysis blocks: mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 2.8 MB ⤓ Opus 703 kB { }
What was heard
mixed 100%. Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Heppen, Limburg, Belgium (JO21oc) · Longwire 54m top 70m above sealevel · reported SNR 38 dB — thanks to the operator. Receivers
Provenance
sha256 a7ffa8257bd14c6ed05f5993aaead5ca00f0903d781d83f52da5a4ba363337ed
source 03:03 WAV, 12000 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-20T1856Z-4879.2-m23-4880
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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