NIL HEARDRECEPTION LOG

WWV HamSCI test signal (minute 8)

tier A · keyed-tone

10000 kHz AM · 2026-10-01 23:05:44Z · 03:00 · received at Shrewsbury, Vermont, USA

Spectrogram of WWV HamSCI test signal (minute 8), 10000 kHz AM, 2026-10-01 23:05:44Z, 03:00: keyed-tone 100% · tone 600 Hz · keying 0.20 Hz depth 0.90
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 3.0 MB ⤓ Opus 725 kB { }
What was heard
keyed-tone 100% · tone 600 Hz · keying 0.20 Hz depth 0.90 — dominant tone 600 Hz, keyed at 0.2 Hz (depth 0.9). 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 30 dB — thanks to the operator. Receivers
Provenance
sha256 64e10d0ff68a6b35a30f7879bf2075c0c725161ad60efb4f89f9423a97daec63
source 03:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-10-01T2305Z-10000-wwv-hamsci-10000
Heard in the record
Reception Conditions Were Poor — “Whistler Mode”
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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