YO4XPF — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving YO4XPF, decoded by SO8OO in southeastern Poland. 22 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-08-27.
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 22 FT8 messages attributed to YO4XPF as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (55%), followed by 40 m (45%). Several six-hour UTC windows tied for the largest share (86%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (68%); the estimated median was -1 dB.
Overview
Bands
Last attributed message: 2026-08-27 18:33 UTC
Observed FT8 message patterns
- Attributed sample
- 22 messages
- Active dates
- 5 UTC dates
- Estimated median S/N
- -1 dB
- Estimated 10th-90th percentile
- -19 to +6 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 15.
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 YO4XPF 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 YO4XPF
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
- KN35 · 7 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 628 km (approx.)
- Last such locator decoded
- 2026-08-27 18:33 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 | YO4XPF S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-27 18:32 | 20m | +2 / - | PA0ARR | +1 / -5 | 4 | ✓ Closing observed |
| 08-27 18:30 | 20m | -9 / -15 | PD1DRE | +8 / +2 | 3 | ✓ Full exchange observed |
| 07-30 04:08 | 20m | - / - | V31DL | -10 / - | 2 | Partial capture |
| 07-25 18:00 | 20m | -24 / -9 | IU5HIU | -2 / - | 3 | ✓ Closing observed |
| 07-25 17:58 | 20m | -19 / -7 | CN2DX | +4 / - | 5 | ✓ Full exchange observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 201400 +1 2922 KY4UI YO4XPF KN35 202900 -5 800 YO4XPF M8KKH R-10 035100 -1 2900 AK4T YO4XPF KN35 035200 -16 2069 K9STL YO4XPF KN35 040615 -10 628 VA3KGB YO4XPF KN35 040800 -9 919 YO4XPF V31DL EK57 (x2) 183030 +7 711 YO4XPF PD1DRE -15 183045 -9 711 PD1DRE YO4XPF R+02 183100 +9 711 YO4XPF PD1DRE RR73 183200 +2 709 YO4XPF PA0ARR RR73 183215 +3 712 PA0ARR YO4XPF R-05 183230 +0 709 YO4XPF PA0ARR RR73 183245 +0 712 PA0ARR YO4XPF R-05 183345 +10 342 S57TW YO4XPF KN35
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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