NIL HEARDRECEPTION LOG

WWV HamSCI test signal (minute 8)

tier A · keyed-tone

10000 kHz AM · 2026-09-21 17:07:08Z · 03:00 · received at BIRMINGHAM, ALABAMA, USA

Spectrogram of WWV HamSCI test signal (minute 8), 10000 kHz AM, 2026-09-21 17:07:08Z, 03:00: keyed-tone 100% · tone 600 Hz · keying 0.35 Hz depth 0.95
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 3.2 MB ⤓ Opus 690 kB { }
What was heard
keyed-tone 100% · tone 600 Hz · keying 0.35 Hz depth 0.95 — dominant tone 600 Hz, keyed at 0.35 Hz (depth 0.95). 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 25 dB — thanks to the operator. Receivers
Provenance
sha256 ed47b98575117d783b8780fa7f4ca2b39a1ea94c4cc91f81bb33e7e58546eadd
source 03:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-21T1707Z-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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