K4A — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving K4A, decoded by SO8OO in southeastern Poland. 153 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-08-22 and 2026-09-10.
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 153 FT8 messages attributed to K4A 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 (98%), followed by 40 m (2%). Most decodes (54%) fell within the six-hour window 01:00-07:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.
Overview
Bands
Last attributed message: 2026-09-10 04:34 UTC
Observed FT8 message patterns
- Attributed sample
- 153 messages
- Active dates
- 3 UTC dates
- Estimated median S/N
- -8 dB
- Estimated 10th-90th percentile
- -14 to 0 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 11, moderate (-15 to -9 dB) 65, strong (≥ -8 dB) 77.
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 K4A 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 K4A
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
- FK68 · 69 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,360 km (approx.)
- Last such locator decoded
- 2026-08-23 23:10 UTC
Other locator fields attributed to this token: FM18 (1).
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 | K4A S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-11 05:51 | 40m | - / -9 | F5MSE | -7 / - | 2 | ✓ Closing fragment |
| 09-10 06:07 | 40m | - / - | PD1BER | -7 / - | 3 | Partial capture |
| 09-10 06:03 | 40m | - / - | DJ9FBA | -3 / - | 9 | Partial capture |
| 09-10 05:59 | 40m | - / -24 | IU5RTR | -10 / - | 4 | ✓ Closing fragment |
| 09-10 05:54 | 40m | - / - | IW2IDB | -5 / - | 3 | Partial capture |
| 09-10 05:53 | 40m | - / -13 | F5MOO | -9 / - | 10 | ✓ Closing fragment |
| 09-10 05:52 | 40m | - / -16 | IZ2ACM | -1 / - | 3 | ✓ Closing fragment |
| 09-10 05:50 | 40m | - / - | PC2J | -4 / - | 4 | Partial capture |
| 09-10 05:42 | 40m | - / - | PC2J | -7 / - | 2 | Partial capture |
| 09-10 05:21 | 40m | - / - | ON4IQ | +6 / - | 2 | Partial capture |
| 09-10 04:47 | 40m | - / - | PC2J | -12 / - | 2 | Partial capture |
| 09-10 04:40 | 40m | - / -15 | IZ2QPP | -12 / - | 5 | ✓ Closing fragment |
| 09-10 04:33 | 40m | -21 / - | KR4MFX | - / - | 2 | Partial capture |
| 09-10 04:32 | 40m | - / - | IZ2QPP | -11 / - | 4 | Partial capture |
| 09-10 04:27 | 40m | - / -13 | DL3OCF | -10 / - | 4 | ✓ Closing fragment |
| 09-10 04:09 | 40m | - / - | DL8TV | -15 / - | 4 | Partial capture |
| 09-10 03:59 | 40m | - / -15 | EA1CQ | -5 / - | 2 | ✓ Closing fragment |
| 09-10 03:56 | 40m | - / -1 | F5UOU | -16 / - | 2 | Partial capture |
| 08-23 23:10 | 20m | -5 / - | TL8GD | - / -12 | 4 | ✓ Closing fragment |
| 08-23 23:04 | 20m | 0 / - | M9KER | - / -11 | 2 | ✓ Closing fragment |
| 08-23 23:01 | 20m | - / -4 | LU2NI | -19 / - | 2 | Partial capture |
| 08-23 23:01 | 20m | 0 / - | GI5RPG | - / -6 | 2 | ✓ Closing fragment |
| 08-23 22:58 | 20m | -2 / - | EA7LIC | -7 / -14 | 2 | Partial capture |
| 08-23 22:57 | 20m | -2 / - | XU7O | - / - | 2 | Partial capture |
| 08-23 22:52 | 20m | -5 / - | TJ1GD | - / -19 | 12 | Partial capture |
| 08-23 22:50 | 20m | +1 / - | XU7O | - / - | 2 | Partial capture |
| 08-23 22:45 | 20m | -1 / - | 4L7T | - / -17 | 3 | Partial capture |
| 08-23 21:14 | 20m | - / -3 | WP4QEC | -14 / - | 2 | Partial capture |
| 08-23 21:12 | 20m | -8 / - | CR7BRV | -4 / 0 | 3 | ✓ Closing observed |
| 08-23 21:12 | 20m | - / - | EA5JLN | 0 / - | 5 | Partial capture |
| 08-23 21:09 | 20m | - / - | 2E0BTX | -7 / - | 11 | Partial capture |
| 08-23 21:09 | 20m | - / - | SV5BYP | +2 / - | 5 | Partial capture |
| 08-23 20:50 | 20m | -12 / - | IS0KNO | -4 / -13 | 7 | Partial capture |
| 08-23 20:49 | 20m | -9 / - | N8AU | - / -6 | 2 | Partial capture |
| 08-23 20:40 | 20m | - / - | IS0LYN | 0 / - | 2 | Partial capture |
| 08-23 20:20 | 20m | - / - | S57ESG | +10 / - | 5 | Partial capture |
| 08-23 20:16 | 20m | - / -15 | GM4HCY | -11 / - | 2 | Partial capture |
| 08-23 20:16 | 20m | - / - | HB9TIH | -4 / - | 13 | Partial capture |
| 08-23 20:13 | 20m | - / - | ER1NM | -14 / - | 3 | Partial capture |
| 08-23 20:11 | 20m | - / - | DL2JB | +9 / - | 4 | Partial capture |
| 08-23 20:07 | 20m | - / - | HB9TIH | -6 / - | 7 | Partial capture |
| 08-23 20:07 | 20m | - / - | SV5BYP | +3 / - | 5 | Partial capture |
| 08-23 20:05 | 20m | - / - | PD1GOL | -5 / - | 2 | Partial capture |
| 08-23 20:00 | 20m | -18 / - | WA4MJ | - / -8 | 3 | Partial capture |
| 08-23 19:53 | 20m | - / -18 | F8WAJ | -2 / - | 2 | ✓ Closing fragment |
| 08-23 19:53 | 20m | - / -13 | OE5FIL | +3 / - | 13 | Partial capture |
| 08-23 19:44 | 20m | - / - | HB9TIH | -16 / - | 3 | Partial capture |
| 08-23 19:36 | 20m | - / - | G6MTI | -2 / - | 4 | Partial capture |
| 08-23 19:36 | 20m | - / - | F4BYA | -1 / - | 4 | Partial capture |
| 08-23 19:36 | 20m | - / -22 | UX5UO | -17 / - | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 060030 -11 2222 K4A IU5RTR 73 060300 -6 1100 K4A DJ9FBA JN39 (x6) 060700 -7 2329 K4A PD1BER JO22 060730 +0 1101 K4A DJ9FBA JN39 060730 -7 2329 K4A PD1BER JO22 060800 -4 1101 K4A DJ9FBA JN39 060800 -8 2329 K4A PD1BER JO22 060830 +0 1101 K4A DJ9FBA JN39 055145 -7 1132 K4A F5MSE -09 (x2)
UTC dB Audio Message 230330 +9 2134 K4A IQ4JO JN63 230345 +2 502 CQ K4A FK68 230415 +1 502 M9KER K4A R-11 (x2) 230515 +1 502 CQ K4A FK68 (x5) 230915 -1 503 PD0IFI K4A RR73 230945 -1 503 CQ K4A FK68 231045 -8 922 TL8GD K4A FK68 (x4)
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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