KB1EFS — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving KB1EFS, decoded by SO8OO in southeastern Poland. 987 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 27 UTC dates in the available aggregate history. Observed between 2026-06-11 and 2026-09-07.
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 987 FT8 messages attributed to KB1EFS as the transmitting token by decoded message structure across 27 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (38%), followed by 80 m (36%) and 20 m (25%). Most decodes (87%) fell within the six-hour window 22:00-04:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12.9 dB.
Overview
Bands
Last attributed message: 2026-09-07 02:03 UTC
Observed FT8 message patterns
- Attributed sample
- 987 messages
- Active dates
- 27 UTC dates
- Estimated median S/N
- -12.9 dB
- Estimated 10th-90th percentile
- -21 to -2 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 311, moderate (-15 to -9 dB) 373, strong (≥ -8 dB) 303.
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 KB1EFS 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 KB1EFS
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
- FN14 · 553 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 6,917 km (approx.)
- Last such locator decoded
- 2026-08-31 02:59 UTC
Other locator fields attributed to this token: FN41 (26).
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 | KB1EFS S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-07 22:11 | 40m | - / -17 | DL5YAS | -6 / - | 3 | Partial capture |
| 09-07 21:57 | 40m | - / - | EA5JLN | -10 / - | 6 | Partial capture |
| 09-07 21:51 | 40m | - / - | DG5PW | -10 / - | 5 | Partial capture |
| 09-07 21:34 | 40m | - / -15 | M0THH | -21 / - | 4 | Partial capture |
| 09-07 21:25 | 40m | - / -19 | SP6CA | -5 / - | 3 | ✓ Closing fragment |
| 09-07 21:21 | 40m | - / -13 | HB9FUR | -2 / - | 2 | ✓ Closing fragment |
| 09-06 02:22 | 40m | - / - | F4HQB | -4 / - | 2 | Partial capture |
| 09-06 01:47 | 40m | - / -20 | EG3PDA | -2 / - | 3 | ✓ Closing fragment |
| 09-05 23:41 | 40m | - / +7 | K2SAB | -15 / - | 2 | Partial capture |
| 09-05 23:25 | 40m | - / 0 | GW4NOO | -10 / - | 4 | ✓ Closing fragment |
| 09-05 23:13 | 40m | - / - | MW7PPO | -16 / - | 2 | Partial capture |
| 09-05 22:57 | 40m | - / -2 | OZ2NYB/P | -7 / - | 8 | ✓ Closing fragment |
| 09-05 22:10 | 40m | - / - | OZ2NYB/P | -5 / - | 2 | Partial capture |
| 09-05 21:59 | 40m | - / -8 | OZ2NYB/P | -10 / - | 2 | Partial capture |
| 09-04 02:37 | 40m | - / -19 | R3PK | -4 / - | 2 | Partial capture |
| 08-31 17:24 | 20m | - / - | DL5ALF | -13 / - | 2 | Partial capture |
| 08-31 17:21 | 20m | - / -14 | PD5DSL | -8 / - | 3 | ✓ Closing fragment |
| 08-31 16:59 | 20m | - / - | PD3FR | +5 / - | 2 | Partial capture |
| 08-31 16:50 | 20m | - / -23 | PD0RDD | -6 / - | 3 | ✓ Closing fragment |
| 08-31 16:49 | 20m | - / - | IK2LRF | -10 / - | 4 | Partial capture |
| 08-31 16:46 | 20m | - / -22 | PD0WL | -14 / - | 4 | ✓ Closing fragment |
| 08-31 16:23 | 20m | - / - | M9LHX | -1 / - | 3 | Partial capture |
| 08-31 16:18 | 20m | - / - | M9LHX | -1 / - | 4 | Partial capture |
| 08-31 15:15 | 20m | - / -25 | DF8DR | +1 / - | 17 | Partial capture |
| 08-31 14:54 | 20m | - / -16 | DG1KFR | -2 / - | 6 | Partial capture |
| 08-31 14:43 | 20m | - / -19 | G7SQC | -4 / - | 3 | Partial capture |
| 08-31 14:36 | 20m | - / -5 | GM0DYU | -4 / - | 3 | ✓ Closing fragment |
| 08-31 14:13 | 20m | - / - | M9TMC | -11 / - | 3 | Partial capture |
| 08-31 13:51 | 20m | - / -13 | ON2AJ | -4 / - | 4 | Partial capture |
| 08-31 12:41 | 20m | - / - | PA4RFS | -5 / - | 3 | Partial capture |
| 08-31 12:41 | 20m | - / - | M0LAD | +3 / - | 6 | Partial capture |
| 08-31 12:37 | 20m | - / - | IK4LZH | -8 / - | 2 | Partial capture |
| 08-31 12:36 | 20m | - / -17 | PD0PET | -2 / - | 6 | Partial capture |
| 08-31 12:36 | 20m | - / 0 | OO0O | +7 / - | 13 | Partial capture |
| 08-31 12:26 | 20m | - / - | PD3LKN | -8 / - | 2 | Partial capture |
| 08-31 12:25 | 20m | - / - | RA9UO | -16 / - | 4 | Partial capture |
| 08-31 12:20 | 20m | - / -11 | DL4JG | -14 / - | 2 | Partial capture |
| 08-31 12:17 | 20m | - / -17 | F5IXN | +6 / - | 3 | ✓ Closing fragment |
| 08-31 12:10 | 20m | - / -16 | IU1CYA | +8 / - | 2 | Partial capture |
| 08-31 02:59 | 80m | - / -16 | DO1OAS | 0 / - | 2 | Partial capture |
| 08-31 02:53 | 80m | - / -20 | DO1OAS | -2 / - | 8 | Partial capture |
| 08-31 02:51 | 80m | - / -13 | F4EZJ | +16 / - | 5 | ✓ Closing fragment |
| 08-31 02:45 | 80m | -24 / -13 | DJ1OJ | +14 / -12 | 13 | Partial capture |
| 08-31 02:45 | 80m | - / -20 | EW6BZ | +2 / - | 2 | Partial capture |
| 08-31 02:41 | 80m | - / -16 | DO1OAS | -6 / - | 5 | Partial capture |
| 08-31 02:41 | 80m | - / - | SM7XON | +2 / - | 2 | Partial capture |
| 08-31 02:40 | 80m | - / -16 | UR5SG | +14 / - | 2 | Partial capture |
| 08-31 02:38 | 80m | -24 / - | KD8TO | - / -13 | 2 | ✓ Closing fragment |
| 08-31 02:35 | 80m | - / - | IK6QRE | +2 / - | 2 | Partial capture |
| 08-31 02:30 | 80m | - / -13 | DD7EE | +6 / - | 10 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 213730 -18 1135 KB1EFS M0THH R-15 215130 -10 1980 KB1EFS DG5PW JO30 (x5) 215700 -9 1736 KB1EFS EA5JLN IM99 (x6) 221100 -7 1980 KB1EFS DL5YAS JO31 (x3)
UTC dB Audio Message 025445 +19 2334 KB1EFS F4EZJ 73 025445 -4 1600 KB1EFS DO1OAS -20 (x5) 025700 -24 1601 CQ KB1EFS FN14 (x4) 025945 +1 1601 KB1EFS DO1OAS -16 (x2) 015830 +17 2725 KB1EFS SO100PKP -21 015900 +23 2725 KB1EFS RR73; R3LDK <...> +04 020330 -24 984 CQ KB1EFS FN41 a1
UTC dB Audio Message 165045 -4 2021 KB1EFS PD0RDD JO22 (x3) 165245 -7 2124 KB1EFS IK2LRF JN45 165945 +7 2021 KB1EFS PD3FR JO22 (x2) 170315 +5 2021 KB1EFS OE5NVL JN67 170745 +6 2021 KB1EFS HB9BXS R-13 171915 +3 2021 KB1EFS PD8XXX JO22 172115 -8 2021 KB1EFS PD5DSL JO22 (x3) 172415 -12 1722 KB1EFS DL5ALF JN48 (x2) 173315 -14 777 KB1EFS EA4HHN -13
UTC dB Audio Message 182130 -20 1903 KB1EFS PU2XEE -18 201300 -17 2278 KB1EFS DN9OPA JN38 (x5) 131445 +10 628 KB1EFS HB9CTU JN47 (x3) 145100 -21 1341 KB1EFS F4LWD RR73 150115 -22 1654 KB1EFS SV0LS KN00
UTC dB Audio Message 015145 -18 1097 KB1EFS DO8DL JO40
UTC dB Audio Message 020530 -1 2133 KB1EFS ER3UA KN37 020530 +1 1992 KB1EFS DL3VZL R-11 020700 -24 1886 KB1EFS W1ARY FN31 020700 -10 625 KB1EFS G0AZH IO83 (x2) 020730 -23 1886 KB1EFS W1ARY R+03 020830 -8 2321 KB1EFS HB9DGR JN47 022030 -17 2057 KB1EFS IW0HAC JN61 (x5)
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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