4O5JD — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving 4O5JD, decoded by SO8OO in southeastern Poland. 54 FT8 messages attributed to this token as transmitter, on 40m, 10m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-12 and 2026-08-23.
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 54 FT8 messages attributed to 4O5JD as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (65%), followed by 40 m (35%). In this small sample, the estimated median decoder S/N was -11 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-08-23 16:07 UTC
Observed FT8 message patterns
- Attributed sample
- 54 messages
- Active dates
- 2 UTC dates
- Estimated median S/N
- -11 dB
- Estimated 10th-90th percentile
- -20 to +2 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 13, moderate (-15 to -9 dB) 21, strong (≥ -8 dB) 20.
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 4O5JD in decoded directed-looking exchanges:
Most frequent locator attributed to 4O5JD
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
- JN92 · 6 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 854 km (approx.)
- Last such locator decoded
- 2026-08-23 15:53 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 | 4O5JD S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-30 09:30 | 10m | - / - | IK1LZF | -19 / - | 27 | Partial capture |
| 08-23 16:07 | 10m | -14 / - | UT7NS | - / +3 | 2 | ✓ Closing fragment |
| 08-23 16:00 | 10m | -10 / - | DL7ARV | - / +6 | 2 | ✓ Closing fragment |
| 08-23 15:54 | 10m | -20 / - | DN9BB | - / -2 | 2 | ✓ Closing fragment |
| 08-23 15:49 | 10m | -16 / - | RV3LO | - / -16 | 2 | Partial capture |
| 08-23 15:44 | 10m | -12 / - | PA3CSG | - / - | 2 | ✓ Closing fragment |
| 08-23 15:43 | 10m | -15 / - | SP9HAB | - / +5 | 2 | ✓ Closing fragment |
| 08-23 15:41 | 10m | -9 / - | PD2TL | - / - | 3 | ✓ Closing fragment |
| 08-23 15:40 | 10m | -20 / - | DL1SMA | - / -2 | 2 | ✓ Closing fragment |
| 08-23 15:39 | 10m | -10 / - | G1HWY | - / -5 | 2 | ✓ Closing fragment |
| 08-23 15:38 | 10m | -14 / - | PF1H | - / +7 | 2 | ✓ Closing fragment |
| 08-23 15:37 | 10m | -16 / - | SP6LUV | - / -9 | 2 | ✓ Closing fragment |
| 08-23 15:35 | 10m | -14 / - | DN9DHG | - / -1 | 2 | ✓ Closing fragment |
| 07-23 14:25 | 10m | - / - | UA4FKT | -22 / - | 2 | Partial capture |
| 07-23 14:20 | 10m | - / - | UA4FKT | -18 / - | 2 | Partial capture |
| 07-23 13:29 | 10m | - / -5 | OZ5EEH | -7 / - | 7 | ✓ Closing fragment |
| 07-23 13:28 | 10m | - / -1 | M7XRI | -19 / - | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 093945 -17 1590 4O5JD IK1LZF JN44 (x15)
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