NIL HEARDRECEPTION LOG

WWV time signal, 20 MHz (day)

tier A · keyed-tone

20000 kHz AM · 2026-10-04 18:10:15Z · 03:28 · received at Shrewsbury, Vermont, USA

Spectrogram of WWV time signal, 20 MHz (day), 20000 kHz AM, 2026-10-04 18:10:15Z, 03:28: keyed-tone 73% · carrier 27% · tone 600 Hz · keying 1.00 Hz depth 0.98
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 3.3 MB ⤓ Opus 856 kB { }
What was heard
keyed-tone 73% · carrier 27% · tone 600 Hz · keying 1.00 Hz depth 0.98 — dominant tone 600 Hz, keyed at 1.0 Hz (depth 0.98). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Shrewsbury, Vermont, USA (FN33om) · 82m (270ft) center fed doublet @ 20m (65ft) MF through HF · reported SNR 22 dB — thanks to the operator. Receivers
Provenance
sha256 1b2de05077e5fea7270a360bdff7f4aee6df1d1d8e24eb17388fe2350a3a1f76
source 03:28 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-10-04T1810Z-20000-wwv-20000
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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