NIL HEARDRECEPTION LOG

GYA Northwood radiofax, 4610 kHz (night)

tier A · data

4608.1 kHz USB · 2026-10-06 16:15:02Z · 08:33 · received at Heppen, Limburg, Belgium

Spectrogram of GYA Northwood radiofax, 4610 kHz (night), 4608.1 kHz USB, 2026-10-06 16:15:02Z, 08:33: data 35% · keyed-tone 23% · mixed 15% · morse 15% · carrier 8% · voice 4% · tone 2197 Hz · keying 4.00 Hz depth 0.94
spectrogram 0–6.0 kHz · analysis blocks: voice keyed-tone morse data carrier mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 8.1 MB ⤓ Opus 2007 kB { }
What was heard
data 35% · keyed-tone 23% · mixed 15% · morse 15% · carrier 8% · voice 4% · tone 2197 Hz · keying 4.00 Hz depth 0.94 — dominant tone 2197 Hz, keyed at 4.0 Hz (depth 0.94). 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 33 dB — thanks to the operator. Receivers
Provenance
sha256 13b1a4de7a3eebfc876b852ad012e8952802d82c757213f1ee386d9814f61af3
source 08:33 WAV, 12000 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-10-06T1615Z-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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