K5UF — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving K5UF, decoded by SO8OO in southeastern Poland. 13 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-22.
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 13 FT8 messages attributed to K5UF as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (92%), followed by 20 m (8%). In this small sample, the estimated median decoder S/N was -18 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-09-22 01:04 UTC
Observed FT8 message patterns
- Attributed sample
- 13 messages
- Active dates
- 2 UTC dates
- Estimated median S/N
- -18 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 12, moderate (-15 to -9 dB) 1, strong (≥ -8 dB) 0.
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 K5UF in decoded directed-looking exchanges:
Most frequent locator attributed to K5UF
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
- EM54 · 5 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,429 km (approx.)
- Last such locator decoded
- 2026-09-22 00:45 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 | K5UF S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-03 02:32 | 40m | - / -15 | R3ST | -2 / - | 9 | Partial capture |
| 09-29 23:32 | 40m | - / - | EA5OB | -15 / - | 2 | Partial capture |
| 09-29 00:35 | 40m | - / -14 | I1RJP | +5 / - | 3 | ✓ Closing fragment |
| 09-29 00:34 | 40m | - / - | PC2J | +2 / - | 3 | Partial capture |
| 09-25 00:53 | 80m | - / -21 | F5UKW | +11 / - | 3 | ✓ Closing fragment |
| 09-23 01:18 | 40m | - / - | G5TV | -4 / - | 2 | Partial capture |
| 09-22 01:04 | 40m | -18 / - | SP6JIU | - / -2 | 2 | ✓ Closing fragment |
| 09-22 00:44 | 40m | -16 / -10 | ON1DGN | -5 / -24 | 13 | ✓ Full exchange observed |
| 09-22 00:17 | 40m | - / - | PE1NPS | 0 / - | 4 | Partial capture |
| 09-22 00:12 | 40m | -21 / -7 | IZ5WTV | +6 / -19 | 7 | Partial capture |
| 09-22 00:10 | 40m | -18 / -15 | ON5WR | 0 / - | 5 | Partial capture |
| 09-22 00:08 | 40m | -18 / - | SV9QWC | - / - | 2 | Partial capture |
| 09-21 00:54 | 40m | - / -7 | F5NBU | -10 / - | 5 | ✓ Closing fragment |
| 09-20 01:12 | 40m | - / - | I1RJP | +4 / - | 3 | Partial capture |
| 09-20 00:09 | 40m | - / - | I1RJP | +4 / - | 2 | Partial capture |
| 09-17 23:19 | 40m | - / - | EA5OB | -20 / - | 16 | Partial capture |
| 09-17 01:10 | 40m | - / - | UA4FKT | +5 / - | 3 | Partial capture |
| 09-16 23:11 | 40m | - / -17 | MI7XHT | -10 / - | 2 | Partial capture |
| 09-16 01:53 | 40m | - / -8 | PI4DX | -14 / - | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 003500 -2 602 K5UF I1RJP JN45 (x3) 005300 +1 1465 K5UF F4EGM JN29 233200 -17 1941 K5UF EA5OB IM99 (x2) 023215 +7 2731 K5UF R3ST LO05 (x9)
UTC dB Audio Message 005300 +11 2347 K5UF F5UKW JN12 (x3)
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