F5RTF — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving F5RTF, decoded by SO8OO in southeastern Poland. 38 FT8 messages attributed to this token as transmitter, on 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-07-20 and 2026-09-11.
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 38 FT8 messages attributed to F5RTF 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 (100%). In this small sample, the estimated median decoder S/N was -4 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 38 messages
- Active dates
- 2 UTC dates
- Estimated median S/N
- -4 dB
- Estimated 10th-90th percentile
- -18 to +7 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 8, moderate (-15 to -9 dB) 8, strong (≥ -8 dB) 22.
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 F5RTF in decoded directed-looking exchanges:
Most frequent locator attributed to F5RTF
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
- JN29 · 19 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,206 km (approx.)
- Last such locator decoded
- 2026-09-11 04:53 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 | F5RTF S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-11 04:44 | 40m | -1 / - | HJ4RUS | - / - | 4 | Partial capture |
| 09-11 04:42 | 40m | +12 / - | F5OYA/P | -13 / +4 | 3 | ✓ Closing observed |
| 09-11 04:41 | 40m | +7 / - | HA9OA | - / +5 | 2 | ✓ Closing fragment |
| 09-11 04:39 | 40m | -2 / - | OA4ENG | - / -10 | 3 | ✓ Closing fragment |
| 09-11 04:33 | 40m | 0 / - | ND9M | - / -6 | 4 | ✓ Closing fragment |
| 09-11 04:29 | 40m | -1 / - | KC1UVP | - / -14 | 2 | ✓ Closing fragment |
| 09-11 04:25 | 40m | -12 / -13 | PV8AJ | -12 / +2 | 6 | ✓ Full exchange observed |
| 09-11 04:20 | 40m | -16 / - | LY1NM | - / +1 | 2 | ✓ Closing fragment |
| 09-11 04:19 | 40m | -20 / -10 | RZ6L | +12 / +1 | 5 | ✓ Full exchange observed |
| 07-20 04:54 | 40m | -18 / - | WC5WC | - / -15 | 2 | Partial capture |
| 07-20 04:36 | 40m | -16 / - | <...> | - / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 044015 +0 2104 OA4ENG F5RTF 73 044115 +2 2103 HA9OA F5RTF +05 (x2) 044230 -13 2991 F5RTF F5OYA/P JN13 044315 +13 2991 F5OYA/P F5RTF +04 (x2) 044445 -2 1870 HJ4RUS F5RTF JN29 (x4) 045145 +7 2839 CQ F5RTF JN29 (x5)
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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