NIL HEARDRECEPTION LOG

WWV time signal

tier A · keyed-tone

10000 kHz AM · 2026-09-25 16:12:10Z · 08:02 · received at BIRMINGHAM, ALABAMA, USA

Spectrogram of WWV time signal, 10000 kHz AM, 2026-09-25 16:12:10Z, 08:02: keyed-tone 92% · carrier 8% · tone 501 Hz · keying 0.20 Hz depth 0.96
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 8.6 MB ⤓ Opus 1841 kB { }
What was heard
keyed-tone 92% · carrier 8% · tone 501 Hz · keying 0.20 Hz depth 0.96 — dominant tone 501 Hz, keyed at 0.2 Hz (depth 0.96). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, BIRMINGHAM, ALABAMA, USA (EM63oi) · BEVERAGE 500 feet long Combine with MLA-30+ MAG LOOP Please Check in with Call or Name. · reported SNR 27 dB — thanks to the operator. Receivers
Provenance
sha256 e971c0850ffbafc298205d9a465badec6fcbab44aae27ba76cb972b5074bcb26
source 08:02 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-25T1612Z-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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