NIL HEARDRECEPTION LOG

GYA Northwood radiofax, 4610 kHz (night)

tier A · keyed-tone

4608.1 kHz USB · 2026-09-22 19:52:21Z · 04:53 · received at Brettnach F57320

Spectrogram of GYA Northwood radiofax, 4610 kHz (night), 4608.1 kHz USB, 2026-09-22 19:52:21Z, 04:53: keyed-tone 73% · carrier 20% · morse 7% · tone 2297 Hz · keying 0.53 Hz depth 0.78
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 5.3 MB ⤓ Opus 1206 kB { }
What was heard
keyed-tone 73% · carrier 20% · morse 7% · tone 2297 Hz · keying 0.53 Hz depth 0.78 — dominant tone 2297 Hz, keyed at 0.53 Hz (depth 0.78). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Brettnach F57320 (JN39GG) · vertical · reported SNR 45 dB — thanks to the operator. Receivers
Provenance
sha256 4a8744b77ffe8662e306185c82fa5dd56d499a0810f5bd6a3fb8f37deb321032
source 04:53 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-22T1952Z-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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