K4RPD — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving K4RPD, decoded by SO8OO in southeastern Poland. 12 FT8 messages attributed to this token as transmitter, on 80m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-21.
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 12 FT8 messages attributed to K4RPD as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (58%), followed by 80 m (42%). In this small sample, the estimated median decoder S/N was -10 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-09-21 04:23 UTC
Observed FT8 message patterns
- Attributed sample
- 12 messages
- Active dates
- 3 UTC dates
- Estimated median S/N
- -10 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 5, 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. 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 K4RPD in decoded directed-looking exchanges:
Most frequent locator attributed to K4RPD
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
- FM02 · 5 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,002 km (approx.)
- Last such locator decoded
- 2026-09-21 04:22 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 | K4RPD S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-21 04:30 | 80m | - / - | F5UKW | +17 / - | 10 | Partial capture |
| 09-21 04:24 | 80m | - / -21 | DK7ZT | +6 / - | 5 | Partial capture |
| 09-21 04:22 | 80m | -16 / -11 | F6ECI | +8 / -6 | 4 | ✓ Full exchange observed |
| 09-21 04:21 | 80m | -21 / -8 | IT9JNR | +2 / - | 2 | Partial capture |
| 09-21 04:21 | 80m | - / - | SP8DK | +19 / - | 8 | Partial capture |
| 09-21 04:21 | 80m | - / - | F5UKW | +13 / - | 13 | Partial capture |
| 09-21 04:20 | 80m | -10 / - | DO8JB | - / - | 2 | Partial capture |
| 09-21 04:17 | 40m | - / -9 | HB10GBT | -3 / - | 2 | Partial capture |
| 09-19 03:29 | 40m | - / -10 | SV9QWC | -9 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 032900 -8 1946 K4RPD SV9QWC -10 (x2) 041030 +1 1224 K4RPD EA3GGM -04 041745 -7 2202 K4RPD HB10GBT -09 (x2) 043930 -13 2130 K4RPD GU4WRP -09 044930 +1 3032 K4RPD RR73; SP2DPK <...> +04
UTC dB Audio Message 042600 +14 2737 K4RPD F5UKW JN12 042600 +8 1149 K4RPD DK7ZT -21 042630 +17 2737 K4RPD F5UKW JN12 042630 +2 1149 K4RPD DK7ZT -21 042700 +16 2737 K4RPD F5UKW JN12 (x11)
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