UR5KJA — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving UR5KJA, decoded by SO8OO in southeastern Poland. 21 FT8 messages attributed to this token as transmitter, on 40m, across 1 UTC dates in the available aggregate history. Last observed 2026-09-20.
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 21 FT8 messages attributed to UR5KJA as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). In this small sample, the estimated median decoder S/N was -10 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 21 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- -10 dB
- Estimated 10th-90th percentile
- -13 to -6 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 12, 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 UR5KJA in decoded directed-looking exchanges:
Most frequent locator attributed to UR5KJA
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
- KO20 · 13 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 237 km (approx.)
- Last such locator decoded
- 2026-09-20 11:23 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 | UR5KJA S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-20 11:12 | 40m | -6 / - | SM3ULU | - / -12 | 2 | ✓ Closing fragment |
| 09-20 11:10 | 40m | -9 / -7 | YL2QV | -23 / - | 2 | ✓ Closing observed |
| 09-20 11:08 | 40m | -10 / -15 | 9A4ZM | -7 / -26 | 6 | ✓ Full exchange observed |
| 09-20 11:07 | 40m | - / -20 | DK7ZT | -14 / - | 4 | Partial capture |
| 09-20 11:05 | 40m | -11 / -15 | OZ9FF | -10 / -13 | 6 | ✓ Full exchange observed |
| 09-20 10:54 | 40m | -12 / - | OZ9FF | - / - | 4 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 110830 -10 1527 CQ UR5KJA KO20 110845 -13 1906 UR5KJA DK7ZT -20 110845 -9 1522 UR5KJA 9A4ZM JN86 110900 -8 1526 CQ UR5KJA KO20 110915 -9 1522 UR5KJA 9A4ZM JN86 110930 -11 1526 9A4ZM UR5KJA -26 110945 -3 1522 UR5KJA 9A4ZM R-15 111000 -8 1526 9A4ZM UR5KJA RR73 111015 -7 1522 UR5KJA 9A4ZM 73 111045 -23 1843 UR5KJA YL2QV R-07 111100 -9 1526 YL2QV UR5KJA RR73 111130 -10 1526 CQ UR5KJA KO20 111230 -6 1525 SM3ULU UR5KJA -12 (x2) 112345 -9 1526 PF7DKW UR5KJA KO20
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