NIL HEARDRECEPTION LOG

NAU US Navy Puerto Rico, continuous FSK

tier A · mixed

10151.5 kHz USB · 2026-09-23 15:50:37Z · 10:00 · received at BIRMINGHAM, ALABAMA, USA

Spectrogram of NAU US Navy Puerto Rico, continuous FSK, 10151.5 kHz USB, 2026-09-23 15:50:37Z, 10:00: mixed 100%
spectrogram 0–6.0 kHz · analysis blocks: mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.6 MB ⤓ Opus 2508 kB { }
What was heard
mixed 100%. 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 ef0b7863633680f2f96f2e6bb236deee8e6ce98c746f186a3ba302e831027b5e
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-23T1550Z-10151.5-fsk-nau-10153
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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