YU1UN — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving YU1UN, decoded by SO8OO in southeastern Poland. 39 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-06-14 and 2026-09-16.
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 39 FT8 messages attributed to YU1UN as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (77%), followed by 20 m (23%). Most decodes (95%) fell within the six-hour window 11:00-17:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -16 dB.
Overview
Bands
Last attributed message: 2026-09-16 12:01 UTC
Observed FT8 message patterns
- Attributed sample
- 39 messages
- Active dates
- 3 UTC dates
- Estimated median S/N
- -16 dB
- Estimated 10th-90th percentile
- -21 to -5 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 23, moderate (-15 to -9 dB) 7, strong (≥ -8 dB) 9.
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 YU1UN in decoded directed-looking exchanges:
Most frequent locator attributed to YU1UN
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
- JN93 · 22 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 747 km (approx.)
- Last such locator decoded
- 2026-09-16 12:00 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 | YU1UN S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-19 02:49 | 40m | - / -7 | R6ZAJ | -6 / - | 3 | ✓ Closing fragment |
| 09-19 02:38 | 40m | - / -1 | RA6ALF | -8 / - | 3 | ✓ Closing fragment |
| 09-19 02:37 | 40m | - / -18 | EA5HM | -7 / - | 5 | Partial capture |
| 09-19 02:33 | 40m | - / -2 | UA4FKT | +10 / - | 3 | ✓ Closing fragment |
| 09-16 12:00 | 40m | -17 / - | SV1MOK | - / -12 | 3 | ✓ Closing fragment |
| 06-29 14:16 | 20m | -23 / - | YB8DYX | - / - | 2 | Partial capture |
| 06-29 14:13 | 20m | -22 / - | YB8DYX | - / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 120145 -19 1182 SV1MOK YU1UN 73 023330 +11 2358 YU1UN UA4FKT LO23 (x3) 023730 -8 947 YU1UN EA5HM IM99 (x2) 023830 -7 1639 YU1UN RA6ALF LN05 023830 -5 947 YU1UN EA5HM R-18 023900 -8 1639 YU1UN RA6ALF R-01 023900 -5 947 YU1UN EA5HM R-18 023930 -9 1639 YU1UN RA6ALF 73 023930 -7 947 YU1UN EA5HM R-18 024900 -2 2358 YU1UN R6ZAJ KN98 (x3)
UTC dB Audio Message 141300 -24 1520 YB8DYX YU1UN JN93 (x4)
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