4X5KL — reception at SO8OO
Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.
FT8 activity
Receiver-side FT8 activity involving 4X5KL, decoded by SO8OO in southeastern Poland. 33 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 2 UTC dates in the available aggregate history. Observed between 2026-08-08 and 2026-08-28.
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 33 FT8 messages attributed to 4X5KL as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (97%), followed by 10 m (3%). In this small sample, the estimated median decoder S/N was -15 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-08-28 15:14 UTC
Observed FT8 message patterns
- Attributed sample
- 33 messages
- Active dates
- 2 UTC dates
- Estimated median S/N
- -15 dB
- Estimated 10th-90th percentile
- -19 to -7 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 15, moderate (-15 to -9 dB) 12, strong (≥ -8 dB) 6.
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 4X5KL in decoded directed-looking exchanges:
Most frequent locator attributed to 4X5KL
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
- KM71 · 7 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 2,325 km (approx.)
- Last such locator decoded
- 2026-08-28 15:13 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 | 4X5KL S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-28 15:13 | 20m | -6 / -22 | YB5SD | -17 / -13 | 4 | ✓ Full exchange observed |
| 08-28 15:13 | 20m | -5 / - | HB9EKJ | - / -10 | 3 | ✓ Closing fragment |
| 08-28 15:11 | 20m | -11 / - | IU5HIU | - / -22 | 2 | ✓ Closing fragment |
| 08-28 15:08 | 20m | -14 / - | CT2IGO | -14 / - | 3 | ✓ Closing observed |
| 08-28 15:07 | 20m | - / - | F4LJG | -12 / - | 3 | Partial capture |
| 08-28 15:07 | 20m | -10 / -2 | R3NBI | +5 / -6 | 3 | Partial capture |
| 08-28 14:50 | 20m | -15 / - | UA3ZMQ | - / -10 | 3 | ✓ Closing fragment |
| 08-28 14:49 | 20m | -15 / -4 | IW9FRA | -10 / -16 | 6 | ✓ Full exchange observed |
| 08-28 14:47 | 20m | -13 / -5 | M0PEX | +5 / - | 5 | ✓ Closing observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 150830 -12 1889 DH2RL 4X5KL -10 150845 -16 1889 4X5KL F4LJG IN93 151015 +0 1889 4X5KL F5MXH JN07 151015 -19 1601 4X5KL CT2IGO 73 151030 -14 1889 CT2IGO 4X5KL RR73 151100 -9 1889 IU5HIU 4X5KL -22 (x2) 151200 -8 1889 IZ8EYN 4X5KL R-19 151300 -8 1889 HB9EKJ 4X5KL KM71 151315 -18 1888 4X5KL YB5SD OJ01 151330 -5 1889 HB9EKJ 4X5KL R-10 (x2) 151430 -6 1889 YB5SD 4X5KL -13 151445 -17 1890 4X5KL YB5SD R-22 (x2)
CW
No CW receptions recorded for this callsign in the last 30 days.
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