NIL HEARDRECEPTION LOG

GYA Northwood radiofax, 4610 kHz (night)

tier A · mixed

4608.1 kHz USB · 2026-09-20 16:00:59Z · 10:00 · received at Heppen, Limburg, Belgium

Spectrogram of GYA Northwood radiofax, 4610 kHz (night), 4608.1 kHz USB, 2026-09-20 16:00:59Z, 10:00: mixed 50% · keyed-tone 23% · morse 17% · carrier 7% · voice 3% · tone 2300 Hz · keying 0.25 Hz depth 0.82
spectrogram 0–6.0 kHz · analysis blocks: voice keyed-tone morse carrier mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 8.6 MB ⤓ Opus 2376 kB { }
What was heard
mixed 50% · keyed-tone 23% · morse 17% · carrier 7% · voice 3% · tone 2300 Hz · keying 0.25 Hz depth 0.82 — dominant tone 2300 Hz, keyed at 0.25 Hz (depth 0.82). 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 34 dB — thanks to the operator. Receivers
Provenance
sha256 1adb0cdf53add4f3347316c5c5e71c65c5586a59920ab3f4f479921001384cd8
source 10:00 WAV, 12000 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-20T1600Z-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.
Related