NIL HEARDRECEPTION LOG

GYA Northwood radiofax, 4610 kHz (night)

tier A · morse

4608.1 kHz USB · 2026-09-21 04:50:07Z · 07:04 · received at South West England, UK

Spectrogram of GYA Northwood radiofax, 4610 kHz (night), 4608.1 kHz USB, 2026-09-21 04:50:07Z, 07:04: morse 73% · keyed-tone 18% · carrier 9% · tone 2297 Hz · keying 0.55 Hz depth 0.80
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 7.6 MB ⤓ Opus 1728 kB { }
What was heard
morse 73% · keyed-tone 18% · carrier 9% · tone 2297 Hz · keying 0.55 Hz depth 0.80 — dominant tone 2297 Hz, keyed at 0.55 Hz (depth 0.8). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, South West England, UK (IO80qr) · Switched · reported SNR 40 dB — thanks to the operator. Receivers
Provenance
sha256 b05cdc4ddb743ab029288db17fc943646a7aeeeaa8778c0b6230c90a58fa064d
source 07:04 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-21T0450Z-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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