NIL HEARDRECEPTION LOG

WWV time signal

tier A · keyed-tone

10000 kHz AM · 2026-09-19 03:50:29Z · 10:00 · received at Presque Isle, WI USA

Spectrogram of WWV time signal, 10000 kHz AM, 2026-09-19 03:50:29Z, 10:00: keyed-tone 93% · carrier 7% · tone 501 Hz · keying 0.50 Hz depth 0.94
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 9.4 MB ⤓ Opus 2420 kB { }
What was heard
keyed-tone 93% · carrier 7% · tone 501 Hz · keying 0.50 Hz depth 0.94 — dominant tone 501 Hz, keyed at 0.5 Hz (depth 0.94). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Presque Isle, WI USA (EN56ef) · 85 Meter Loop > 500 - 1500 kHz Filter > MCA104M Split · reported SNR 36 dB — thanks to the operator. Receivers
Provenance
sha256 0781f9a71858286f959818cc18235116b26d0aff3250550205be64c8a77711a5
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-19T0350Z-10000-wwv-10000-na
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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