4X5EX — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving 4X5EX, decoded by SO8OO in southeastern Poland. 2 FT8 messages attributed to this token as transmitter, on 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-07-16 and 2026-07-22.
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 2 FT8 messages attributed to 4X5EX as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The available sample contains attributed decodes on 20 m (100%). The sample is too small to infer a recurring UTC-hour or received-S/N pattern.
Overview
Observed FT8 message patterns
- Attributed sample
- 2 messages
- Active dates
- 2 UTC dates
- S/N summary
- Too few decodes
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
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 4X5EX in decoded directed-looking exchanges:
Most frequent locator attributed to 4X5EX
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 · 2 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 2,325 km (approx.)
- Last such locator decoded
- 2026-07-22 18:38 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 | 4X5EX S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-08 18:11 | 10m | - / -2 | F4IGI | -16 / - | 2 | ✓ Closing fragment |
| 07-19 17:13 | 20m | - / -11 | RA9SJG | -11 / - | 2 | ✓ Closing fragment |
| 07-17 16:32 | 20m | - / - | YO4DW | -10 / - | 2 | ✓ Closing fragment |
| 07-17 16:23 | 20m | - / -18 | IK4TVP | -11 / - | 3 | Partial capture |
| 07-17 16:23 | 20m | - / - | IK4LZH | -12 / - | 2 | ✓ Closing fragment |
| 07-17 16:16 | 20m | - / -17 | S52D | -10 / - | 2 | ✓ Closing fragment |
| 07-16 18:35 | 20m | - / -17 | YO4NF | -5 / - | 2 | Partial capture |
| 06-28 09:58 | 10m | - / +3 | SV2CLJ | -8 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 095845 -5 592 4X5EX SV2CLJ +03 (x2) 100630 -13 1015 4X5EX IQ9BF R-10 143900 -15 1028 4X5EX D2UY RR73 175445 -5 2732 4X5EX F1PBZ RR73 180815 -14 1207 4X5EX IZ7UIU R-18 181145 -14 1497 4X5EX F4IGI R-02 (x2)
UTC dB Audio Message 183615 -4 1429 4X5EX YO4NF -17 202600 -22 1393 CQ 4X5EX KM71 a1 161600 -16 1201 4X5EX S52D R-17 (x2) 161800 -17 1190 4X5EX R9FDE 73 162315 -11 761 4X5EX IK4LZH JN54 162345 -10 2350 4X5EX IK4TVP -18 (x2) 162415 -14 761 4X5EX IK4LZH 73 162445 -9 2350 4X5EX IK4TVP -18 163245 -10 749 4X5EX YO4DW RR73 (x2) 171315 -11 2637 4X5EX RA9SJG -11 (x2) 183845 -24 1519 EW7EL 4X5EX KM71
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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