OK5TK — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving OK5TK, decoded by SO8OO in southeastern Poland. 20 FT8 messages attributed to this token as transmitter, on 40m, across 1 UTC dates in the available aggregate history. Last observed 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 20 FT8 messages attributed to OK5TK as the transmitting token by decoded message structure across 1 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 +1 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 20 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- +1 dB
- Estimated 10th-90th percentile
- -5 to +4 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 1, strong (≥ -8 dB) 19.
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 OK5TK in decoded directed-looking exchanges:
Most frequent locator attributed to OK5TK
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
- JO70 · 13 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 487 km (approx.)
- Last such locator decoded
- 2026-09-11 21:55 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 | OK5TK S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-11 21:58 | 40m | +1 / -3 | EB3JT | -6 / 0 | 5 | ✓ Full exchange observed |
| 09-11 21:57 | 40m | +2 / - | UA9CR | - / +3 | 2 | ✓ Closing fragment |
| 09-11 21:56 | 40m | +4 / -3 | SV1DKR | -9 / - | 5 | ✓ Closing observed |
| 09-11 21:54 | 40m | 0 / - | UC6W | - / -14 | 5 | ✓ Closing fragment |
| 09-11 21:47 | 40m | 0 / - | UC6W | - / - | 3 | Partial capture |
| 09-11 21:43 | 40m | -1 / - | UC6W | - / - | 2 | Partial capture |
| 09-11 21:36 | 40m | +1 / - | UC6W | - / - | 5 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 215530 +3 2522 UC6W OK5TK JO70 (x3) 215645 -9 1793 OK5TK SV1DKR KM18 215700 +1 2522 UA9CR OK5TK R+03 (x2) 215745 -11 1793 OK5TK SV1DKR KM18 (x2) 215830 +4 2522 SV1DKR OK5TK RR73 215845 -8 1793 OK5TK SV1DKR 73 215845 -4 2522 OK5TK EB3JT JN01 215900 +0 2522 EB3JT OK5TK +00 215915 -5 2522 OK5TK EB3JT R-03 215930 +2 2522 EB3JT OK5TK RR73 215945 -8 2522 OK5TK EB3JT 73
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