SP5DUJ — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving SP5DUJ, decoded by SO8OO in southeastern Poland. 218 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 34 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-05.
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 218 FT8 messages attributed to SP5DUJ as the transmitting token by decoded message structure across 34 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (67%), followed by 20 m (33%). Most decodes (62%) fell within the six-hour window 05:00-11:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -17.5 dB.
Overview
Bands
Last attributed message: 2026-10-05 08:41 UTC
Observed FT8 message patterns
- Attributed sample
- 218 messages
- Active dates
- 34 UTC dates
- Estimated median S/N
- -17.5 dB
- Estimated 10th-90th percentile
- -24 to -10 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 129, moderate (-15 to -9 dB) 73, strong (≥ -8 dB) 16.
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.
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with SP5DUJ in decoded directed-looking exchanges:
Attributed messages by UTC hour
Rolling 90-day UTC chart window. Counts follow decoded message structure: the first token for CQ, or the second token in a directed-looking message.
Most frequent locator attributed to SP5DUJ
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
- KO02 · 170 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 290 km (approx.)
- Last such locator decoded
- 2026-10-05 07:46 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 | SP5DUJ S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-06 05:47 | 40m | - / -19 | S55A | -10 / - | 2 | ✓ Closing fragment |
| 10-06 02:43 | 40m | - / -15 | EA5FD | -10 / - | 3 | Partial capture |
| 10-05 08:40 | 40m | -17 / -19 | LZ1DPP | -16 / -10 | 4 | Partial capture |
| 10-05 08:30 | 40m | - / -13 | SP8KJX | -20 / - | 2 | ✓ Closing fragment |
| 10-05 08:19 | 40m | - / -14 | OE3FVU | -12 / - | 2 | ✓ Closing fragment |
| 10-05 08:14 | 40m | - / -9 | OK1HEH | -4 / - | 2 | ✓ Closing fragment |
| 10-05 08:10 | 40m | - / -4 | DK6WH | -9 / - | 6 | Partial capture |
| 10-05 08:00 | 40m | - / -10 | SQ9SET | -2 / - | 2 | ✓ Closing fragment |
| 10-05 07:46 | 40m | -14 / - | SQ7TX | - / - | 2 | Partial capture |
| 10-05 07:32 | 40m | - / -19 | HB9ACA | -11 / - | 3 | Partial capture |
| 10-05 07:17 | 40m | - / -7 | HA7TM | +7 / - | 2 | ✓ Closing fragment |
| 10-05 07:15 | 40m | -24 / -5 | UT4PA | +2 / - | 3 | ✓ Closing observed |
| 10-05 07:12 | 40m | - / +5 | DL4ME | +6 / - | 2 | ✓ Closing fragment |
| 10-05 07:04 | 40m | - / -14 | HA1ZW | -2 / - | 2 | ✓ Closing fragment |
| 10-05 06:58 | 40m | - / -10 | HG5OGI | -9 / - | 2 | ✓ Closing fragment |
| 10-05 02:56 | 40m | - / -18 | LZ2II | -8 / - | 2 | ✓ Closing fragment |
| 10-05 02:50 | 40m | - / -19 | YO6LM | -7 / - | 6 | Partial capture |
| 10-05 02:48 | 40m | - / -17 | F6FDY | +2 / - | 2 | ✓ Closing fragment |
| 10-05 02:21 | 40m | - / -14 | HB9EFK | +6 / - | 2 | ✓ Closing fragment |
| 10-04 06:41 | 40m | - / 0 | HA1BF | 0 / - | 3 | ✓ Closing fragment |
| 10-04 02:59 | 40m | - / -14 | SV3AUW | -8 / - | 3 | ✓ Closing fragment |
| 10-03 08:20 | 40m | - / -11 | HB9EFK | 0 / - | 2 | ✓ Closing fragment |
| 10-03 08:19 | 40m | -23 / - | DL9TZ | -20 / -18 | 3 | ✓ Closing observed |
| 10-03 06:39 | 40m | - / -13 | S55A | -3 / - | 2 | ✓ Closing fragment |
| 10-03 06:33 | 40m | - / -11 | 9A1MM | +1 / - | 2 | ✓ Closing fragment |
| 10-03 06:32 | 40m | - / -16 | HG5OGI | 0 / - | 3 | Partial capture |
| 10-03 03:38 | 40m | - / -22 | YO4GIY | -6 / - | 2 | ✓ Closing fragment |
| 10-03 02:28 | 40m | - / -19 | 4X5CG | -18 / - | 2 | Partial capture |
| 10-02 06:30 | 40m | - / -4 | HG5OGI | -10 / - | 2 | ✓ Closing fragment |
| 10-02 06:22 | 40m | -24 / - | SP5TAE | -12 / -5 | 2 | ✓ Closing observed |
| 10-02 02:06 | 40m | - / -18 | PI4DX | +4 / - | 5 | Partial capture |
| 10-02 01:21 | 40m | - / -16 | TA2VUZ | -5 / - | 3 | ✓ Closing fragment |
| 10-01 02:38 | 40m | - / -14 | IW2ODG | -10 / - | 2 | ✓ Closing fragment |
| 09-30 07:50 | 40m | - / -12 | LZ3CB | 0 / - | 2 | ✓ Closing fragment |
| 09-30 07:23 | 40m | - / -23 | IW4BYK | -13 / - | 2 | ✓ Closing fragment |
| 09-30 06:37 | 40m | - / -24 | HA1ZW | -7 / - | 2 | ✓ Closing fragment |
| 09-30 06:34 | 40m | - / -18 | DF9HT/P | -8 / - | 2 | Partial capture |
| 09-29 06:24 | 40m | - / -8 | YU65AEC | -2 / - | 2 | Partial capture |
| 09-29 03:32 | 40m | - / -16 | G8KHF | -4 / - | 3 | Partial capture |
| 09-29 02:45 | 40m | - / -11 | F6HUK | +5 / - | 2 | ✓ Closing fragment |
| 09-29 02:31 | 40m | - / -18 | EC3A | -10 / - | 2 | ✓ Closing fragment |
| 09-28 05:27 | 40m | - / -12 | DD4U | -17 / - | 2 | ✓ Closing fragment |
| 09-27 06:28 | 40m | - / -20 | DL5DQZ | +3 / - | 2 | ✓ Closing fragment |
| 09-27 06:25 | 40m | - / -21 | PI4DX | -2 / - | 5 | Partial capture |
| 09-27 06:10 | 40m | - / -17 | YO6LM | -18 / - | 2 | ✓ Closing fragment |
| 09-27 06:06 | 40m | - / -13 | HB9EFK | -6 / - | 2 | ✓ Closing fragment |
| 09-26 19:21 | 40m | - / -14 | PD1B | -5 / - | 2 | Partial capture |
| 09-26 19:15 | 40m | - / -20 | DL7VGU | +8 / - | 3 | Partial capture |
| 09-26 02:46 | 40m | - / -10 | F5SJC | +1 / - | 2 | ✓ Closing fragment |
| 09-26 02:40 | 40m | - / -7 | HA1BF | +3 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 081445 -3 1708 SP5DUJ OK1HEH -09 (x2) 081930 -11 1595 SP5DUJ OE3FVU -14 (x2) 083015 -20 2089 SP5DUJ SP8KJX -13 (x2) 084015 -16 965 SP5DUJ LZ1DPP -19 084030 -17 2009 LZ1DPP SP5DUJ R-10 (x2) 084115 -17 964 SP5DUJ LZ1DPP -19 024315 -10 2334 SP5DUJ EA5FD IM99 (x3) 054700 -10 1896 SP5DUJ S55A -19 (x2)
UTC dB Audio Message 014330 -24 1696 SP5DUJ LZ936BA -17
UTC dB Audio Message 090315 -10 2507 SP5DUJ PD5MVH -14 (x6) 091930 -8 783 SP5DUJ II7MGXX -06 092200 +1 600 SP5DUJ F1BHB -09 (x2) 092330 +4 2105 SP5DUJ II7MGBT -07 (x2) 092745 -20 2265 SP5DUJ F1UNR -10 101130 -2 1873 SP5DUJ PD0TDK -17 (x3)
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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