ON9CLU — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Belgium Most frequent locator attributed to this token: JO20

Receiver-side FT8 activity involving ON9CLU, decoded by SO8OO in southeastern Poland. 28 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-22 and 2026-11-02.

These are automated observations at the SO8OO receiver, not an official contact log. Times are UTC. Attribution follows decoded FT8 message structure: CQ uses the first token and directed-looking messages use the second. Free text that resembles a directed message can be attributed imperfectly. Summary S/N reflects propagation plus SO8OO receiver, antenna and local-noise conditions. Counts are not adjusted for monitoring outages; transmissions that were not decoded are absent. Inferred entity and location data may be inaccurate for portable, remote or special-event operation.

SO8OO decoded 28 FT8 messages attributed to ON9CLU as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (79%), followed by 80 m (21%). Most decodes (100%) fell within the six-hour window 12:00-18:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (100%); the estimated median was +14 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

+14 dB

Estimated median S/N

Bands

80m · 6 40m · 22

First attributed message: 2026-06-22
Last attributed message: 2026-11-02 14:36 UTC

Observed FT8 message patterns

Attributed sample: 28 messages
Active dates: 7 UTC dates
Estimated median S/N: +14 dB
Estimated 10th-90th percentile: +7 to +22 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 0, strong (≥ -8 dB) 28.

WSJT-X defines S/N reports against a 2,500 Hz reference noise bandwidth. The ranges above are SO8OO receiver-side display categories, not official WSJT-X classes, transmitter-power measurements or estimates of how easy the station is to hear elsewhere. Statistics include only successful decodes on SO8OO's monitored FT8 channels; transmissions that were not decoded are absent.

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with ON9CLU in decoded directed-looking exchanges:

3A2LF · Monaco ON9TB · Belgium JG3TRB · Japan YB1LIN · Indonesia YC2KME · Indonesia

Attributed messages by UTC hour

Rolling 90-day UTC chart window. Counts follow decoded message structure: the first token for CQ, or the second token in a directed-looking message.

Most frequent locator attributed to ON9CLU

The map compares the centres and boundaries of the locator field attributed to this token by decoded message structure, 2° × 1° as a Maidenhead square, and SO8OO's six-character receiver square. The separation is not an exact antenna-to-antenna distance or a radio-path length.

Attributed locator: JO20 · 10 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,194 km (approx.)
Last such locator decoded: 2026-11-02 14:36 UTC

A decoded locator can describe portable, remote or special-event operation and is not proof of a permanent station address or transmitter identity.

Observed FT8 exchanges

S/N cells show: decoded at SO8OO / report transmitted by the counterpart. An observed exchange is not a QSL or an official logbook confirmation.

Time UTC	Band	ON9CLU S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-02 14:36	40m	+22 / -	DL1RI/P	- / +5	2	Partial capture
11-02 14:33	40m	- / -	DH3TK	-8 / -	3	Partial capture
11-02 14:32	40m	+19 / -	9V1YC	- / -5	5	Partial capture
11-02 12:05	40m	- / -	9A4ZM	+2 / -	2	Partial capture
11-02 12:05	40m	- / -	DK7ZT	-12 / -	4	Partial capture
11-02 12:02	40m	+11 / -	3A2LF	- / -3	7	✓ Closing fragment
10-17 15:56	80m	+22 / -	YB1LIN	- / -15	2	✓ Closing fragment
09-28 13:17	40m	+10 / -	ON9TB	-21 / 0	5	✓ Closing observed
09-09 16:27	80m	- / -	UA4FKT	+8 / -	3	Partial capture
09-09 16:27	80m	+13 / -19	YC2KME	-12 / -12	4	✓ Full exchange observed
08-24 17:30	80m	- / -	DO9BAU	+2 / -	13	Partial capture
08-24 17:29	80m	+22 / -	JG3TRB	-8 / -18	3	✓ Closing observed

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

40m

UTC    dB Audio  Message
120545 -14 1907  ON9CLU DK7ZT +20
120545  +3  965  ON9CLU 9A4ZM JN86
120615 -14 1907  ON9CLU DK7ZT +20 (x2)
143215 +21  511  9V1YC ON9CLU -05 (x3)
143330  -6  239  ON9CLU DH3TK JO42
143345 +16  716  9V1YC ON9CLU -05
143400  -8  239  ON9CLU DH3TK JO42 (x2)
143445 +22  716  9V1YC ON9CLU -05
143600 +21  771  DL1RI/P ON9CLU JO20
143615  -9  572  ON9CLU GB1POPPY +05
143630 +22  771  DL1RI/P ON9CLU R+05

80m

UTC    dB Audio  Message
173400  +5 2202  ON9CLU DO9BAU JO62 (x6)
162700 +12 1233  YC2KME ON9CLU -12
162715 -10 1740  ON9CLU YC2KME R-19
162730 +14 1232  YC2KME ON9CLU RR73
162745 -15 1740  ON9CLU YC2KME 73
162745  +8 1232  ON9CLU UA4FKT LO23 (x3)
155615 +21  518  YB1LIN ON9CLU -15 (x2)

Decoder S/N history by band

Count-weighted daily averages across messages attributed to this profiled token and successfully decoded at SO8OO, limited to the rolling 90-day UTC chart window.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee