ON9CLU — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving ON9CLU, decoded by SO8OO in southeastern Poland. 8 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-22 and 2026-09-09.
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 8 FT8 messages attributed to ON9CLU as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (50%), followed by 40 m (50%). In this small sample, the estimated median decoder S/N was +12 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-09-09 16:27 UTC
Observed FT8 message patterns
- Attributed sample
- 8 messages
- Active dates
- 4 UTC dates
- Estimated median S/N
- +12 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 0, strong (≥ -8 dB) 8.
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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with ON9CLU in decoded directed-looking exchanges:
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 · 2 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,194 km (approx.)
- Last such locator decoded
- 2026-07-13 17:28 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 |
|---|---|---|---|---|---|---|
| 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 |
| 07-13 17:27 | 40m | +13 / - | T22TT | - / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 173300 +0 2202 ON9CLU DO9BAU JO62 (x8) 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)
UTC dB Audio Message 172745 +10 835 T22TT ON9CLU JO20 (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.
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