R4ADV — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving R4ADV, decoded by SO8OO in southeastern Poland. 21 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 10 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-12.
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 21 FT8 messages attributed to R4ADV as the transmitting token by decoded message structure across 10 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (48%), followed by 40 m (29%) and 10 m (19%). Most decodes (95%) fell within the six-hour window 14:00-20:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.
Overview
Bands
Last attributed message: 2026-09-12 03:33 UTC
Observed FT8 message patterns
- Attributed sample
- 21 messages
- Active dates
- 10 UTC dates
- Estimated median S/N
- -15 dB
- Estimated 10th-90th percentile
- -22 to -8 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 10, moderate (-15 to -9 dB) 6, strong (≥ -8 dB) 5.
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 R4ADV 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 R4ADV
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
- LN28 · 12 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,686 km (approx.)
- Last such locator decoded
- 2026-09-12 03:33 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 | R4ADV S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-11 18:54 | 40m | -10 / -13 | ON4AOI | +17 / -14 | 5 | ✓ Full exchange observed |
| 08-31 17:56 | 20m | - / 0 | R4ABU | -7 / - | 2 | Partial capture |
| 07-29 18:17 | 20m | -10 / - | GW4BKG | - / - | 2 | Partial capture |
| 07-26 17:39 | 20m | -9 / - | ON4AEM | - / - | 2 | Partial capture |
| 07-24 19:02 | 20m | -18 / - | PI4ADH | - / -7 | 4 | ✓ Closing fragment |
| 07-17 18:17 | 20m | -8 / -17 | YO4ATW | +4 / -9 | 3 | ✓ Full exchange observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 163530 -2 712 R4ADV RC6OD RR73 180245 -23 1491 EU4BE R4ADV LN28 185415 -13 2506 ON4AOI R4ADV LN28 185600 +16 662 R4ADV ON4AOI -13 185615 -8 686 ON4AOI R4ADV R-14 185630 +18 662 R4ADV ON4AOI RR73 185645 -8 686 ON4AOI R4ADV 73 033345 -10 2663 5B4AMM R4ADV LN28
UTC dB Audio Message 171900 -9 3031 R4ADV JH4ALY RR73 181745 +4 2593 R4ADV YO4ATW -17 181800 -8 2606 YO4ATW R4ADV R-09 181815 +4 2586 R4ADV YO4ATW RR73 190200 -19 1174 PI4ADH R4ADV LN28 (x4) 173915 -12 2441 ON4AEM R4ADV LN28 (x2) 181700 -9 2485 GW4BKG R4ADV LN28 (x2) 175630 -5 1402 R4ADV R4ABU +00 (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.
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