NIL HEARDRECEPTION LOG

GYA Northwood radiofax, 4610 kHz (night)

tier A · morse

4608.1 kHz USB · 2026-09-21 16:01:08Z · 06:54 · received at Larvik, Norway

Spectrogram of GYA Northwood radiofax, 4610 kHz (night), 4608.1 kHz USB, 2026-09-21 16:01:08Z, 06:54: morse 48% · keyed-tone 43% · mixed 5% · carrier 5% · tone 2300 Hz · keying 0.30 Hz depth 0.81
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse carrier mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 7.5 MB ⤓ Opus 1685 kB { }
What was heard
morse 48% · keyed-tone 43% · mixed 5% · carrier 5% · tone 2300 Hz · keying 0.30 Hz depth 0.81 — dominant tone 2300 Hz, keyed at 0.3 Hz (depth 0.81). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Larvik, Norway (JO49xa) · dipole · reported SNR 33 dB — thanks to the operator. Receivers
Provenance
sha256 7cf9dad09244bd06441b8c2b7ba3ab0390fad2150426e2be1b6acfcc2ac9cf11
source 06:54 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-21T1601Z-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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