R5BU — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving R5BU, decoded by SO8OO in southeastern Poland. 6 FT8 messages attributed to this token as transmitter, on 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-29 and 2026-07-26.
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 6 FT8 messages attributed to R5BU as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -23 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 6 messages
- Active dates
- 2 UTC dates
- Estimated median S/N
- -23 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 0, strong (≥ -8 dB) 0.
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 R5BU in decoded directed-looking exchanges:
Most frequent locator attributed to R5BU
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
- KO85 · 2 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,193 km (approx.)
- Last such locator decoded
- 2026-07-26 16:14 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 | R5BU S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-19 20:03 | 60m | - / - | PI4TX | -12 / - | 4 | Partial capture |
| 08-09 10:40 | 20m | - / - | PE9JAN | -13 / - | 3 | Partial capture |
| 06-29 18:59 | 20m | -21 / -2 | R6LNH | -8 / -9 | 5 | ✓ Full exchange observed |
| 06-29 18:57 | 20m | -24 / - | BD5CAM | - / - | 2 | ✓ Closing fragment |
| 06-29 18:50 | 20m | -22 / 0 | M0BEW | -11 / - | 2 | ✓ Closing observed |
| 06-25 13:41 | 20m | - / 0 | UA3ZQN | -6 / - | 7 | ✓ Closing fragment |
| 06-24 18:20 | 40m | - / - | DH0GBC | -12 / - | 8 | Partial capture |
| 06-24 18:18 | 40m | - / - | RM5F | -8 / - | 2 | Partial capture |
| 06-24 18:17 | 40m | - / -13 | IQ4JO | 0 / - | 6 | ✓ Closing fragment |
| 06-24 18:06 | 40m | - / -1 | R3LAF | -22 / - | 5 | ✓ Closing fragment |
| 06-24 17:17 | 20m | - / - | R7DX | -4 / - | 2 | Partial capture |
| 06-24 16:46 | 10m | - / -6 | RW6HP | -16 / - | 5 | Partial capture |
| 06-24 16:25 | 20m | - / - | DL6UM | -9 / - | 4 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 200315 -9 2280 R5BU PI4TX JO22 (x4)
UTC dB Audio Message 185915 -10 1419 R5BU R6LNH KN97 (x2) 190000 -21 1573 R6LNH R5BU -09 190015 -6 1419 R5BU R6LNH R-02 (x2) 195930 -20 1576 R5BU RN6MA -10 201100 -14 2557 R5BU IQ4JO 73 161400 -24 1576 CQ R5BU KO85 a1 161445 -4 2820 R5BU F1PBZ -15 183930 -23 1575 EP2AES R5BU 73 183945 -16 1575 R5BU RZ4AZ LN28 104030 -12 2023 R5BU PE9JAN JO22 (x2) 104130 -19 1577 R5BU RN6MA +08 104130 -14 2023 R5BU PE9JAN JO22
UTC dB Audio Message 164600 -22 1615 R5BU RW6HP LN14 (x5) 162200 -11 579 R5BU R6DWD RR73
UTC dB Audio Message 181800 +1 2732 R5BU IQ4JO 73 181830 -7 803 R5BU RM5F KO85 181830 -2 2732 R5BU IQ4JO JN63 181900 -8 803 R5BU RM5F KO85 181900 +1 2732 R5BU IQ4JO R-05 (x2) 182000 -20 1537 R5BU RX3DQ -15 182000 -13 1496 R5BU DH0GBC JN69 (x8)
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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