K4JC — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving K4JC, decoded by SO8OO in southeastern Poland. 11 FT8 messages attributed to this token as transmitter, on 20m, across 1 UTC dates in the available aggregate history. Last observed 2026-06-30.
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 11 FT8 messages attributed to K4JC as the transmitting token by decoded message structure across 1 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 -19 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 11 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- -19 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 10, moderate (-15 to -9 dB) 1, 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 K4JC in decoded directed-looking exchanges:
Most frequent locator attributed to K4JC
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
- EL97 · 9 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,549 km (approx.)
- Last such locator decoded
- 2026-06-30 01:13 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 | K4JC S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 07-24 22:56 | 20m | - / -19 | IU4SQE | -19 / - | 5 | Partial capture |
| 07-24 22:51 | 20m | - / -19 | IU4SQE | -15 / - | 4 | Partial capture |
| 07-24 22:42 | 20m | - / -18 | PD3AN | -12 / - | 5 | Partial capture |
| 07-24 22:40 | 20m | - / -15 | M0SLI | -14 / - | 2 | ✓ Closing fragment |
| 07-24 22:37 | 20m | - / - | DL1R | +5 / - | 9 | Partial capture |
| 07-24 22:08 | 20m | - / +1 | PD2ARI | -19 / - | 4 | Partial capture |
| 07-20 00:00 | 20m | - / - | CT1BFP | -18 / - | 7 | Partial capture |
| 07-19 23:57 | 20m | - / - | UR4QWW | -8 / - | 4 | Partial capture |
| 06-30 01:12 | 20m | -16 / - | K2JC | - / - | 3 | Partial capture |
| 06-30 00:57 | 20m | -20 / - | K8OMB | - / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 224130 +3 2671 K4JC DL1R JN58 224230 -14 1514 K4JC PD3AN R-18 (x5) 225130 -17 1324 K4JC IU4SQE -19 (x9)
UTC dB Audio Message 231030 -19 1730 K4JC HZ1TT RR73
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