KB1EFS — reception at SO8OO
Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.
FT8 activity
Receiver-side FT8 activity involving KB1EFS, decoded by SO8OO in southeastern Poland. 1,442 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, across 48 UTC dates in the available aggregate history. Observed between 2026-06-11 and 2026-11-05.
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 1,442 FT8 messages attributed to KB1EFS as the transmitting token by decoded message structure across 48 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (49%), followed by 80 m (33%) and 20 m (17%). Most decodes (90%) 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 dB.
Overview
Bands
Last attributed message: 2026-11-05 03:17 UTC
Observed FT8 message patterns
- Attributed sample
- 1,442 messages
- Active dates
- 48 UTC dates
- Estimated median S/N
- -12 dB
- Estimated 10th-90th percentile
- -22 to -1 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 448, moderate (-15 to -9 dB) 549, strong (≥ -8 dB) 445.
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 · 820 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 6,917 km (approx.)
- Last such locator decoded
- 2026-11-05 03:16 UTC
Other locator fields attributed to this token: FN41 (42).
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 |
|---|---|---|---|---|---|---|
| 11-05 04:07 | 160m | - / -21 | IW4AOT | +5 / - | 9 | ✓ Closing fragment |
| 11-05 04:06 | 160m | - / -6 | IZ0BVU | +12 / - | 3 | ✓ Closing fragment |
| 11-05 04:04 | 160m | - / -15 | UT7UA | +17 / - | 3 | ✓ Closing fragment |
| 11-05 04:00 | 160m | - / - | ON8WR | -16 / - | 3 | Partial capture |
| 11-05 03:59 | 160m | - / -11 | IZ0BVU | +7 / - | 3 | ✓ Closing fragment |
| 11-05 03:29 | 40m | - / - | SV1MOZ | -17 / - | 2 | ✓ Closing fragment |
| 11-05 03:23 | 80m | - / - | G0AZH | -11 / - | 4 | Partial capture |
| 11-05 03:21 | 80m | - / -11 | SQ6ELK | -4 / - | 2 | Partial capture |
| 11-05 03:16 | 80m | -22 / - | WU3U | - / +2 | 3 | ✓ Closing fragment |
| 11-05 03:15 | 80m | - / - | R2WAF | +2 / - | 2 | Partial capture |
| 11-05 02:50 | 160m | - / - | ON8WR | -24 / - | 2 | Partial capture |
| 11-04 02:13 | 80m | - / -21 | HB9EOT | -3 / - | 5 | Partial capture |
| 11-04 00:40 | 80m | - / -16 | CT7BRV | -8 / - | 2 | Partial capture |
| 11-03 23:48 | 80m | - / -25 | DK9WI | +11 / - | 7 | ✓ Closing fragment |
| 11-03 01:59 | 80m | - / - | OM0RX | +1 / - | 4 | Partial capture |
| 11-01 03:58 | 80m | - / -20 | TK/DH7SB | 0 / - | 2 | Partial capture |
| 11-01 02:42 | 80m | - / -16 | DF3IS | +8 / - | 2 | ✓ Closing fragment |
| 11-01 01:55 | 80m | - / -21 | G4ANS | +1 / - | 3 | ✓ Closing fragment |
| 11-01 01:32 | 80m | - / -22 | F4EGM | +6 / - | 8 | Partial capture |
| 10-31 01:56 | 80m | - / - | ON8WR | -7 / - | 3 | Partial capture |
| 10-31 01:40 | 80m | - / - | KR2C | -15 / - | 2 | ✓ Closing fragment |
| 10-31 01:26 | 80m | - / -16 | DF8RU | +5 / - | 5 | ✓ Closing fragment |
| 10-31 01:11 | 80m | - / - | ON4MAP | -10 / - | 5 | Partial capture |
| 10-31 00:53 | 80m | - / - | ON8WR | 0 / - | 3 | Partial capture |
| 10-31 00:52 | 80m | - / -14 | EA4IPN | -15 / - | 2 | ✓ Closing fragment |
| 10-31 00:24 | 80m | - / -23 | OZ1LHK | -1 / - | 3 | Partial capture |
| 10-29 02:01 | 80m | - / -10 | IQ0AAI | 0 / - | 5 | ✓ Closing fragment |
| 10-29 01:47 | 80m | - / - | ON8WR | -15 / - | 2 | Partial capture |
| 10-29 00:45 | 80m | - / - | ON8WR | -14 / - | 3 | Partial capture |
| 10-29 00:04 | 80m | - / -22 | ON1JP | -16 / - | 7 | Partial capture |
| 10-28 12:37 | 10m | - / - | CT5JWG | -11 / - | 3 | Partial capture |
| 10-28 05:21 | 40m | - / - | IZ2QPP | +1 / - | 3 | Partial capture |
| 10-28 01:48 | 40m | - / -2 | CT2HEX | -12 / - | 4 | Partial capture |
| 10-28 01:24 | 40m | - / - | CT2GQA | -10 / - | 5 | Partial capture |
| 10-28 00:25 | 60m | - / -16 | G8OO | +8 / - | 3 | ✓ Closing fragment |
| 10-28 00:10 | 60m | - / -20 | DL1OBF | -1 / - | 6 | ✓ Closing fragment |
| 10-28 00:06 | 60m | - / - | 4L7T | -7 / - | 3 | Partial capture |
| 10-27 23:59 | 60m | - / - | 4L7T | -1 / - | 3 | Partial capture |
| 10-26 02:17 | 40m | - / +3 | ON1JP | -13 / - | 6 | ✓ Closing fragment |
| 10-26 02:12 | 40m | - / -19 | RT3K | -8 / - | 3 | ✓ Closing fragment |
| 10-26 02:02 | 40m | -12 / - | AF0DB | - / -24 | 3 | ✓ Closing fragment |
| 10-26 01:48 | 160m | - / -16 | F5UKW | -11 / - | 9 | ✓ Closing fragment |
| 10-26 01:35 | 160m | - / - | F5UKW | -9 / - | 15 | Partial capture |
| 10-26 00:45 | 160m | - / - | F5UKW | -15 / - | 5 | Partial capture |
| 10-26 00:31 | 160m | - / - | F5UKW | -14 / - | 3 | Partial capture |
| 10-26 00:17 | 160m | - / -10 | E77EA | -2 / - | 3 | ✓ Closing fragment |
| 10-26 00:17 | 160m | - / - | F5UKW | -13 / - | 9 | Partial capture |
| 10-23 23:04 | 40m | - / - | M7SLE | -16 / - | 3 | Partial capture |
| 10-23 01:34 | 80m | - / - | DL1MEV | -7 / - | 9 | Partial capture |
| 10-23 01:34 | 80m | - / - | SP9EO | +2 / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 040400 +19 2610 KB1EFS UT7UA KO50 (x3) 040600 +11 878 KB1EFS IZ0BVU JN63 (x3) 040730 +2 2200 KB1EFS IW4AOT -21 (x9)
UTC dB Audio Message 012545 -12 2310 KB1EFS CT2GQA IM58 (x3) 014845 -17 1069 KB1EFS CT2HEX IM58 (x4) 035115 -11 2312 KB1EFS CT2GQA R-19 052145 +1 2311 KB1EFS IZ2QPP JN46 (x3) 071115 -17 2154 KB1EFS GJ0KYZ -04 (x2) 032930 -16 959 KB1EFS SV1MOZ KM17 (x2)
UTC dB Audio Message 031530 -24 1193 CQ KB1EFS FN14 031545 -2 2314 KB1EFS R2WAF KO81 031600 -22 1193 CQ KB1EFS FN14 031615 -1 1194 KB1EFS SP8HDC KO00 031615 +6 2314 KB1EFS R2WAF KO81 031630 -24 1193 WU3U KB1EFS +02 031645 -19 2188 KB1EFS KF9UG EN71 031700 -24 1193 WU3U KB1EFS +02 (x2) 032145 -6 1959 KB1EFS SQ6ELK -11 (x2) 032315 -14 2058 KB1EFS G0AZH IO83 (x4)
UTC dB Audio Message 140815 -8 1135 KB1EFS CR7CDR IM58 153030 -20 1595 KB1EFS CS7BPG R+06 153300 -21 1820 KB1EFS ON1JP -10 (x2) 154000 -13 2494 KB1EFS CR7BUW IM58 (x2) 120030 -15 1854 KB1EFS EA7L IM86 (x2) 153800 -16 2047 KB1EFS CT2HEX IM58 (x4) 123715 -10 693 KB1EFS CT5JWG IN50 (x3)
UTC dB Audio Message 000030 -2 469 KB1EFS 4L7T LN21 (x4) 001000 -3 1097 KB1EFS DL1OBF JO42 (x6) 002500 +9 528 KB1EFS G8OO JO02 (x3) 003515 -14 2393 KB1EFS SP3EPK -02 004445 -24 1771 CQ KB1EFS FN41
UTC dB Audio Message 165045 -18 2124 KB1EFS IK2LRF JN45 165115 -9 2021 KB1EFS PD0RDD R-23 (x2) 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
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.
CW
No CW receptions recorded for this callsign in the last 30 days.
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