UVB-76 "The Buzzer"

tier B · keyed-tone

4625 kHz USB · 2026-09-18 20:10:44Z · 02:00 · received at Brettnach F57320

Spectrogram of UVB-76 "The Buzzer", 4625 kHz USB, 2026-09-18 20:10:44Z, 02:00: keyed-tone 100% · tone 577 Hz · keying 0.30 Hz depth 0.94 — spectrogram 0–6.0 kHz · analysis blocks: keyed-tone

loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 2.1 MB ⤓ Opus 506 kB { }

What was heard

keyed-tone 100% · tone 577 Hz · keying 0.30 Hz depth 0.94 — dominant tone 577 Hz, keyed at 0.3 Hz (depth 0.94). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.

Receiver

KiwiSDR, Brettnach F57320 (JN39GG) · vertical · reported SNR 39 dB — thanks to the operator. Receivers

Provenance

sha256 8053683a43b8e5e3201288705ca297c681d1c4ec8a1bf9258c118a9bad95a17d
source 02:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-18T2010Z-4625-uvb76-4625

Heard in the record

— linked once the record exists.

Notes

rig: Strong tonal capture (flatness 0.036) but NOT confirmed as UVB-76. Content is a steady tone 578.5 Hz above the tuned USB frequency, continuous, with shallow modulation (depth 0.28) at ~0.30 Hz. The Buzzer keys hard on/off roughly 25 times a minute; the envelope here never falls below 0.32 of peak, so this reads as a carrier with QSB fading rather than the keyed buzz. Either UVB-76 heard weakly through deep fading, or an adjacent carrier. Excellent Tier-A carrier/QSB texture regardless; do not label it as the Buzzer without a clean A/B against a live stream.

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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