NIL HEARDRECEPTION LOG

Empty band / atmospherics

tier A · voice

4500 kHz AM · 2026-09-21 01:10:42Z · 10:00 · received at Assen | Netherlands

Spectrogram of Empty band / atmospherics, 4500 kHz AM, 2026-09-21 01:10:42Z, 10:00: noise 93% · voice 7% · keying 2.00 Hz depth 0.83
spectrogram 0–6.0 kHz · analysis blocks: voice noise
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 11.0 MB ⤓ Opus 2322 kB { }
What was heard
noise 93% · voice 7% · keying 2.00 Hz depth 0.83, keyed at 2.0 Hz (depth 0.83). 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 40 dB — thanks to the operator. Receivers
Provenance
sha256 cbb6513a30416320b6c8794f8374a3d6f0e26d88a15e861809f91c8ebef4cf80
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-21T0110Z-4500-quiet-4500
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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