NIL HEARDRECEPTION LOG

GYA Northwood radiofax, 4610 kHz (night)

tier A · keyed-tone

4608.1 kHz USB · 2026-09-25 16:01:22Z · 10:00 · received at Sedlcany, Czech Republic

Spectrogram of GYA Northwood radiofax, 4610 kHz (night), 4608.1 kHz USB, 2026-09-25 16:01:22Z, 10:00: keyed-tone 50% · morse 37% · carrier 10% · data 3% · tone 2326 Hz · keying 0.40 Hz depth 0.84
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse data carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.9 MB ⤓ Opus 2470 kB { }
What was heard
keyed-tone 50% · morse 37% · carrier 10% · data 3% · tone 2326 Hz · keying 0.40 Hz depth 0.84 — dominant tone 2326 Hz, keyed at 0.4 Hz (depth 0.84). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Sedlcany, Czech Republic (JN79GO) · LW 40m · reported SNR 33 dB — thanks to the operator. Receivers
Provenance
sha256 5eef9cb4b70ba9d3291fc08593eceb124cab003fbfab47518b8af1632ca0b48f
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-25T1601Z-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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