NIL HEARDRECEPTION LOG

WWV HamSCI test signal (minute 8)

tier A · keyed-tone

10000 kHz AM · 2026-09-21 05:04:57Z · 03:00 · received at Tellico Plains, TN USA

Spectrogram of WWV HamSCI test signal (minute 8), 10000 kHz AM, 2026-09-21 05:04:57Z, 03:00: keyed-tone 67% · carrier 33% · tone 3999 Hz · keying 0.30 Hz depth 0.87
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 3.2 MB ⤓ Opus 699 kB { }
What was heard
keyed-tone 67% · carrier 33% · tone 3999 Hz · keying 0.30 Hz depth 0.87 — dominant tone 3999 Hz, keyed at 0.3 Hz (depth 0.87). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Tellico Plains, TN USA (EM75ul) · end-fed 173' wire @ 50' · reported SNR 34 dB — thanks to the operator. Receivers
Provenance
sha256 af9867d943a69a0c0dff8603d82be00c573d5911b6262f1e871173fd6ffb1416
source 03:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-21T0504Z-10000-wwv-hamsci-10000
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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