NIL HEARDRECEPTION LOG

WWV time signal

tier A · keyed-tone

10000 kHz AM · 2026-09-21 13:40:36Z · 06:35 · received at BIRMINGHAM, ALABAMA, USA

Spectrogram of WWV time signal, 10000 kHz AM, 2026-09-21 13:40:36Z, 06:35: keyed-tone 90% · carrier 10% · tone 100 Hz · keying 1.00 Hz depth 0.97
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 6.3 MB ⤓ Opus 1526 kB { }
What was heard
keyed-tone 90% · carrier 10% · tone 100 Hz · keying 1.00 Hz depth 0.97 — dominant tone 100 Hz, keyed at 1.0 Hz (depth 0.97). 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 /Low Pass Filter/Band Pass Filter/ A lot of ferrite Core. Linear Power supply. Do not use switching power supply. Ever. · reported SNR 26 dB — thanks to the operator. Receivers
Provenance
sha256 a920d8112277142c6237d4e6b5392b8df269e475d91082bca376b154eb381040
source 06:35 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-21T1340Z-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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