NIL HEARDRECEPTION LOG

SVO Olimpia Radio (Greece) CW marker

tier A · keyed-tone

8423.2 kHz USB · 2026-09-22 10:37:33Z · 10:00 · received at Sedlcany, Czech Republic

Spectrogram of SVO Olimpia Radio (Greece) CW marker, 8423.2 kHz USB, 2026-09-22 10:37:33Z, 10:00: keyed-tone 90% · carrier 10% · tone 852 Hz · keying 0.30 Hz depth 0.98
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 9.8 MB ⤓ Opus 2653 kB { }
What was heard
keyed-tone 90% · carrier 10% · tone 852 Hz · keying 0.30 Hz depth 0.98 — dominant tone 852 Hz, keyed at 0.3 Hz (depth 0.98). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Sedlcany, Czech Republic (JN79GO) · LW 40m · reported SNR 27 dB — thanks to the operator. Receivers
Provenance
sha256 3e3af6678df85a33dc44a747b27a4e116eae88c5bcf221067ff1b15fa384fb13
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-22T1037Z-8423.2-cw-svo-8424
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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