F4CUO — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving F4CUO, decoded by SO8OO in southeastern Poland. 80 FT8 messages attributed to this token as transmitter, on 40m, 10m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-08-21.
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 80 FT8 messages attributed to F4CUO as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (69%), followed by 40 m (31%). Most decodes (79%) fell within the six-hour window 13:00-19:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.
Overview
Bands
Last attributed message: 2026-08-21 12:03 UTC
Observed FT8 message patterns
- Attributed sample
- 80 messages
- Active dates
- 6 UTC dates
- Estimated median S/N
- -9 dB
- Estimated 10th-90th percentile
- -14 to -5 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 38, strong (≥ -8 dB) 37.
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 F4CUO 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 F4CUO
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
- JN03 · 60 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,732 km (approx.)
- Last such locator decoded
- 2026-08-21 12:02 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 | F4CUO S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-21 12:02 | 10m | -6 / - | HA1TJ | - / -7 | 3 | ✓ Closing fragment |
| 08-21 11:57 | 10m | -6 / - | TN8GD | - / - | 2 | ✓ Closing fragment |
| 08-20 14:12 | 10m | -12 / - | <...> | - / - | 3 | Partial capture |
| 08-20 13:59 | 10m | -8 / - | YF1CAR | - / -6 | 4 | Partial capture |
| 08-20 13:55 | 10m | -9 / - | YF1CAR | - / - | 3 | Partial capture |
| 08-20 13:49 | 10m | -12 / - | 4X4ZP | - / -18 | 2 | Partial capture |
| 08-20 13:44 | 10m | -8 / - | YF1CAR | - / - | 3 | Partial capture |
| 08-20 13:42 | 10m | -5 / - | IS0AFM | - / +2 | 3 | Partial capture |
| 08-20 13:34 | 10m | -8 / - | YF1CAR | - / - | 7 | Partial capture |
| 08-20 13:24 | 10m | -11 / - | ZS6KBS | - / - | 2 | Partial capture |
| 08-20 13:23 | 10m | -12 / - | PU4AFG | - / - | 2 | Partial capture |
| 08-20 13:16 | 10m | -13 / - | UT3UW | - / -22 | 3 | ✓ Closing fragment |
| 08-20 13:06 | 10m | -12 / - | YD0ATZ | - / - | 2 | Partial capture |
| 08-20 12:52 | 10m | -14 / - | OK2PHI | - / -15 | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 135545 -10 2417 YF1CAR F4CUO JN03 (x6) 141200 -12 2416 <...> F4CUO JN03 (x3) 141645 -17 2417 YF1CAR F4CUO JN03 115715 -9 2419 TN8GD F4CUO JN03 (x2) 120245 -8 2419 HA1TJ F4CUO JN03 (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.
FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee