WP4TNN — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving WP4TNN, decoded by SO8OO in southeastern Poland. 33 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-08-20 and 2026-08-22.
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 33 FT8 messages attributed to WP4TNN as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (97%), followed by 20 m (3%). In this small sample, the estimated median decoder S/N was -12 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-08-22 23:18 UTC
Observed FT8 message patterns
- Attributed sample
- 33 messages
- Active dates
- 2 UTC dates
- Estimated median S/N
- -12 dB
- Estimated 10th-90th percentile
- -13 to -11 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 32, strong (≥ -8 dB) 0.
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 WP4TNN in decoded directed-looking exchanges:
Most frequent locator attributed to WP4TNN
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
- FK67 · 12 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,443 km (approx.)
- Last such locator decoded
- 2026-08-20 01:44 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 | WP4TNN S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-23 02:19 | 80m | - / -10 | OH1MLZ | +18 / - | 2 | ✓ Closing fragment |
| 08-23 02:11 | 80m | - / -22 | TF3VS | +2 / - | 3 | ✓ Closing fragment |
| 08-22 23:18 | 20m | - / - | SP6AXW | +3 / - | 3 | Partial capture |
| 08-20 01:47 | 40m | - / -22 | UB4CJS | -19 / - | 4 | Partial capture |
| 08-20 01:46 | 40m | -13 / -22 | R6UBM | -3 / -16 | 6 | Partial capture |
| 08-20 01:44 | 40m | - / -10 | UA3GDJ | -5 / - | 3 | ✓ Closing fragment |
| 08-20 01:40 | 40m | - / -14 | F4IFK | +2 / - | 2 | Partial capture |
| 08-20 01:40 | 40m | -12 / -16 | RA4ABH | +7 / - | 4 | ✓ Closing observed |
| 08-20 01:37 | 40m | -12 / -8 | UT5ECZ | -14 / - | 2 | ✓ Closing observed |
| 08-20 01:33 | 40m | -12 / - | S52D | -4 / 0 | 3 | Partial capture |
| 08-20 01:31 | 40m | -13 / -14 | G1CEC | -6 / -10 | 7 | ✓ Full exchange observed |
| 08-20 01:24 | 40m | -13 / -14 | SV8GXC | -4 / - | 4 | ✓ Closing observed |
| 08-20 01:21 | 40m | - / -14 | EA2DYB | -1 / - | 3 | ✓ Closing fragment |
| 08-20 01:10 | 40m | -12 / -13 | PC2J | -13 / -15 | 4 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 014445 -3 2543 WP4TNN UA3GDJ KO92 (x3) 014615 +1 2925 WP4TNN R6UBM LN36 014630 -12 2543 S51AD WP4TNN -12 014715 -17 1942 WP4TNN UB4CJS -22 014730 -9 2925 WP4TNN R6UBM LN36 014730 -13 2542 R6UBM WP4TNN -16 014745 -19 1942 WP4TNN UB4CJS -22 014800 -12 2543 R6UBM WP4TNN -16 014815 -19 1942 WP4TNN UB4CJS -22 014830 -13 2542 R6UBM WP4TNN -16 014845 -22 1942 WP4TNN UB4CJS -22 014845 +0 2925 WP4TNN R6UBM R-22 235715 -8 729 WP4TNN V47JA R+14
UTC dB Audio Message 014400 -15 982 WP4TNN N8NZM 73 021145 +2 2021 WP4TNN TF3VS HP94 (x3) 021915 +15 2508 WP4TNN OH1MLZ -10 (x2)
UTC dB Audio Message 024615 +2 2154 WP4TNN R5AV -14 115045 -9 1881 WP4TNN F1PSX JN08 (x2) 121945 -8 1880 WP4TNN F6BIA R-15 231830 -2 2215 WP4TNN SP6AXW JO80 231845 -20 1974 A92AE WP4TNN -20 231900 +5 2215 WP4TNN SP6AXW JO80 (x2)
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.
FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee