JA4JKO — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving JA4JKO, decoded by SO8OO in southeastern Poland. 476 related FT8 messages, 35 CQ messages, observed on 40m, 20m, 10m, across 50 UTC dates. Heard between 2026-05-25 and 2026-08-23.
These are automated observations at the SO8OO receiver, not the station's official logbook. Times are UTC. Decoder S/N describes messages received at SO8OO; inferred entity and location data may be inaccurate for portable, remote or special-event operation.
FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee
Overview
Frequent QSO partners observed at SO8OO
Stations JA4JKO worked most often, as logged from our receiver:
Activity Heatmap
Locator transmitted by JA4JKO
Approximate centre of PM64, decoded 2026-08-23 22:05 UTC. A transmitted locator is not proof of the operator's permanent location.
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 | JA4JKO S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-23 22:04 | 20m | -14 / - | DA1EA | - / - | 2 | Partial capture |
| 08-23 22:03 | 20m | -10 / - | CT1EMO | - / - | 3 | Partial capture |
| 08-23 22:02 | 20m | - / - | SV5BYP | -4 / - | 2 | Partial capture |
| 08-23 21:58 | 20m | -8 / - | MM0TXT | - / -15 | 7 | ✓ Closing fragment |
| 08-23 21:53 | 20m | -7 / - | IW4EHZ | - / - | 2 | Partial capture |
| 08-23 21:51 | 20m | -9 / - | SQ5EXI | - / -9 | 3 | ✓ Closing fragment |
| 08-23 21:49 | 20m | -4 / -14 | LZ1EV | +4 / -8 | 5 | ✓ Full exchange observed |
| 08-23 21:12 | 40m | - / -17 | R3OR | +14 / - | 2 | ✓ Closing fragment |
| 08-23 21:11 | 40m | - / - | IN3IZQ | -14 / - | 3 | Partial capture |
| 08-22 22:19 | 20m | - / -3 | PD1BJO | -10 / - | 2 | Partial capture |
| 08-22 22:08 | 20m | - / - | F1IQH | -20 / - | 2 | Partial capture |
| 08-22 22:08 | 20m | - / - | PD0U | -8 / - | 2 | Partial capture |
| 08-21 21:45 | 20m | - / -18 | IU2VWQ | +2 / - | 2 | Partial capture |
| 08-21 21:42 | 20m | - / - | EA1RAY | -9 / - | 3 | Partial capture |
| 08-21 21:42 | 20m | - / -5 | EA7BEI | +5 / - | 2 | ✓ Closing fragment |
| 08-20 20:56 | 40m | - / -20 | ON4IQ | +17 / - | 3 | ✓ Closing fragment |
| 08-20 20:53 | 40m | - / -15 | YT3ZT | -15 / - | 2 | ✓ Closing fragment |
| 08-19 21:44 | 20m | - / -14 | EA7EZ | -10 / - | 2 | ✓ Closing fragment |
| 08-16 22:13 | 20m | - / -23 | EI9IB | -12 / - | 2 | ✓ Closing fragment |
| 08-16 21:52 | 20m | - / -18 | CT1BFP | -21 / - | 5 | Partial capture |
| 08-16 21:52 | 20m | - / - | DL1R | +6 / - | 11 | Partial capture |
| 08-13 20:50 | 40m | - / -16 | IK5HHA | 0 / - | 2 | ✓ Closing fragment |
| 08-11 22:21 | 20m | - / -10 | IZ2MHT | -11 / - | 2 | Partial capture |
| 08-11 21:51 | 20m | - / -15 | CR5VP | -10 / - | 2 | ✓ Closing fragment |
| 08-11 21:00 | 40m | - / -10 | R3EDI | -16 / - | 3 | ✓ Closing fragment |
| 08-11 20:56 | 40m | - / -19 | SP2HHX | -11 / - | 5 | ✓ Closing fragment |
| 08-10 22:19 | 20m | - / - | DL1R | +6 / - | 9 | Partial capture |
| 08-10 22:09 | 20m | - / -20 | SP2WRE | +5 / - | 6 | ✓ Closing fragment |
| 08-10 22:01 | 20m | - / -9 | EA6UE | -13 / - | 4 | ✓ Closing fragment |
| 08-09 21:16 | 20m | - / -12 | IW4AOT | -1 / - | 3 | ✓ Closing fragment |
| 08-09 20:54 | 40m | - / -21 | US0QV | -8 / - | 5 | ✓ Closing fragment |
| 08-09 20:54 | 40m | - / - | S57UX | -4 / - | 2 | Partial capture |
| 08-09 20:50 | 40m | - / -14 | SM7DXE | -11 / - | 2 | ✓ Closing fragment |
| 08-07 22:17 | 20m | - / -15 | RA6OF | -15 / - | 3 | ✓ Closing fragment |
| 08-07 22:16 | 20m | - / -2 | DK2WHS | -10 / - | 2 | ✓ Closing fragment |
| 08-07 21:57 | 20m | - / -12 | DB1BW | -16 / - | 2 | Partial capture |
| 08-07 21:56 | 20m | - / -10 | M8KUG | -11 / - | 5 | Partial capture |
| 08-07 21:51 | 20m | - / - | M8KUG | -8 / - | 5 | Partial capture |
| 08-07 21:43 | 20m | - / -13 | M7CYY | -11 / - | 4 | Partial capture |
| 08-07 21:41 | 20m | - / -4 | PD0PJF | -12 / - | 2 | ✓ Closing fragment |
| 08-07 21:36 | 20m | - / -20 | M9KJY | -2 / - | 3 | ✓ Closing fragment |
| 08-06 22:18 | 20m | - / -11 | DL3NA | -4 / - | 2 | Partial capture |
| 08-06 21:18 | 20m | - / -11 | DM4GG | +7 / - | 3 | ✓ Closing fragment |
| 08-05 22:17 | 20m | -23 / -18 | DL2MOS | -11 / - | 4 | Partial capture |
| 08-05 21:54 | 20m | - / -14 | OZ1HBM | -8 / - | 3 | ✓ Closing fragment |
| 08-05 21:51 | 20m | - / -21 | IW4BO | -2 / - | 4 | ✓ Closing fragment |
| 08-05 21:38 | 20m | - / -20 | EA1KCU | -8 / - | 4 | ✓ Closing fragment |
| 08-03 22:03 | 20m | - / -7 | EA1A | -22 / - | 2 | ✓ Closing fragment |
| 07-31 21:52 | 20m | - / -10 | EA5KDN | 0 / - | 2 | ✓ Closing fragment |
| 07-29 22:03 | 20m | - / -23 | M9TAM | -9 / - | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 215845 -8 633 MM0TXT JA4JKO PM64 (x3) 220030 +10 717 JA4JKO IW4EHZ -23 220045 -7 633 MM0TXT JA4JKO R-19 (x4) 220230 +0 1633 JA4JKO SV5BYP KM46 (x2) 220315 -9 633 CT1EMO JA4JKO PM64 (x3) 220445 -13 633 DA1EA JA4JKO PM64 (x2)
UTC dB Audio Message 205045 +0 1678 JA4JKO IK5HHA -16 (x2) 205345 -15 1682 JA4JKO YT3ZT -15 (x2) 205615 +17 2563 JA4JKO ON4IQ JO20 (x3) 210945 +7 790 JA4JKO SN40KZE R-14 210945 -2 2572 JA4JKO YT1UBN KN04 211015 +11 439 JA4JKO IK4LZH JN54 211145 -15 800 JA4JKO IN3IZQ JN56 (x2) 211215 +16 1014 JA4JKO R3OR -17 211245 -11 800 JA4JKO IN3IZQ JN56 211245 +12 1014 JA4JKO R3OR RR73
UTC dB Audio Message 071300 +11 2460 JA4JKO LZ2INP KN34 (x3) 083045 -5 2543 JA4JKO YU7ZZ -08 (x5) 083430 -12 1577 JA4JKO VU2KPH -12 (x2)
Decoder S/N history by band
Daily averages across messages associated with this profile as decoded at SO8OO.