NIL HEARDRECEPTION LOG

WWV HamSCI test signal (minute 8)

tier A · keyed-tone

10000 kHz AM · 2026-09-24 21:05:15Z · 03:00 · received at BIRMINGHAM, ALABAMA, USA

Spectrogram of WWV HamSCI test signal (minute 8), 10000 kHz AM, 2026-09-24 21:05:15Z, 03:00: keyed-tone 89% · carrier 11% · tone 600 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 3.1 MB ⤓ Opus 706 kB { }
What was heard
keyed-tone 89% · carrier 11% · tone 600 Hz · keying 0.20 Hz depth 0.96 — dominant tone 600 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 /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 d78c9341ef487ed9f2aa19c1cf8b817ff2a089b203a375d127539e13102e7064
source 03:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-24T2105Z-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.
Related