NIL HEARDRECEPTION LOG

GYA Northwood radiofax, 4610 kHz (night)

tier A · morse

4608.1 kHz USB · 2026-09-23 16:01:30Z · 02:44 · received at Heppen, Limburg, Belgium

Spectrogram of GYA Northwood radiofax, 4610 kHz (night), 4608.1 kHz USB, 2026-09-23 16:01:30Z, 02:44: morse 67% · carrier 33% · tone 2303 Hz · keying 0.32 Hz depth 0.76
spectrogram 0–6.0 kHz · analysis blocks: morse carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 2.9 MB ⤓ Opus 642 kB { }
What was heard
morse 67% · carrier 33% · tone 2303 Hz · keying 0.32 Hz depth 0.76 — dominant tone 2303 Hz, keyed at 0.32 Hz (depth 0.76). 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 34 dB — thanks to the operator. Receivers
Provenance
sha256 30752148ce7fcc236baeb7de7da64170e0c1eb6d59e25ec435b7b82052cf6b78
source 02:44 WAV, 12000 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-23T1601Z-4608.1-wxfax-gya-4610
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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