NIL HEARDRECEPTION LOG

GYA Northwood radiofax, 4610 kHz (night)

tier A · keyed-tone

4608.1 kHz USB · 2026-09-24 16:21:10Z · 10:00 · received at Heppen, Limburg, Belgium

Spectrogram of GYA Northwood radiofax, 4610 kHz (night), 4608.1 kHz USB, 2026-09-24 16:21:10Z, 10:00: keyed-tone 43% · mixed 27% · carrier 27% · morse 3% · tone 2300 Hz · keying 0.30 Hz depth 0.73
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse carrier mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 9.9 MB ⤓ Opus 2360 kB { }
What was heard
keyed-tone 43% · mixed 27% · carrier 27% · morse 3% · tone 2300 Hz · keying 0.30 Hz depth 0.73 — dominant tone 2300 Hz, keyed at 0.3 Hz (depth 0.73). 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 ea71ed6d6a38a87a3e935e45e8a71eb3e9a1aeceb92e6436f0438d809635bafd
source 10:00 WAV, 12000 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-24T1621Z-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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