EA5JK — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving EA5JK, decoded by SO8OO in southeastern Poland. 1,549 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, 10m, across 56 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-20.
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 1,549 FT8 messages attributed to EA5JK as the transmitting token by decoded message structure across 56 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (28%), followed by 20 m (26%) and 60 m (20%). Most decodes (83%) fell within the six-hour window 01:00-07:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (66%); the estimated median was -5.9 dB.
Overview
Bands
Last attributed message: 2026-09-20 03:19 UTC
Observed FT8 message patterns
- Attributed sample
- 1,549 messages
- Active dates
- 56 UTC dates
- Estimated median S/N
- -5.9 dB
- Estimated 10th-90th percentile
- -15 to +6.7 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 135, moderate (-15 to -9 dB) 389, strong (≥ -8 dB) 1,025.
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 EA5JK 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 EA5JK
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
- IM99 · 620 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 2,129 km (approx.)
- Last such locator decoded
- 2026-09-20 03:14 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 | EA5JK S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-20 03:18 | 40m | +1 / - | RY3F | - / -12 | 3 | Partial capture |
| 09-20 03:12 | 40m | -6 / - | EA5HM | -14 / -16 | 5 | Partial capture |
| 09-20 03:10 | 40m | 0 / - | KF0NYL | - / -22 | 3 | ✓ Closing fragment |
| 09-20 03:08 | 40m | +6 / - | OA4ENG | - / -16 | 2 | ✓ Closing fragment |
| 09-20 02:56 | 160m | 0 / -2 | SV9MBH | -12 / -22 | 8 | ✓ Full exchange observed |
| 09-20 02:51 | 160m | +1 / - | SV9MBH | - / -21 | 7 | Partial capture |
| 09-20 02:39 | 160m | +16 / +10 | UA3AGW | +24 / -5 | 7 | ✓ Full exchange observed |
| 09-20 02:36 | 160m | - / - | DO5PY | -15 / - | 2 | Partial capture |
| 09-20 02:35 | 160m | - / - | SV9MBH | -18 / - | 2 | Partial capture |
| 09-20 02:34 | 160m | - / - | IZ8EOB | -24 / - | 2 | Partial capture |
| 09-20 02:30 | 160m | +12 / - | K1ZM | -8 / -24 | 9 | ✓ Closing observed |
| 09-20 02:27 | 160m | +4 / - | DO1MER | -9 / -18 | 5 | ✓ Full exchange observed |
| 09-20 02:25 | 160m | +4 / - | CT2GQA | - / -5 | 2 | ✓ Closing fragment |
| 09-20 00:13 | 80m | +7 / - | DO8JB | - / -9 | 2 | ✓ Closing fragment |
| 09-20 00:10 | 80m | +5 / - | ON4MAP | -12 / -16 | 6 | ✓ Closing observed |
| 09-20 00:10 | 80m | +4 / -6 | RA6OY | -1 / -13 | 6 | ✓ Full exchange observed |
| 09-19 23:32 | 80m | 0 / - | EA3FR | - / -3 | 2 | ✓ Closing fragment |
| 09-19 23:30 | 80m | +2 / -7 | UF4S | +8 / -12 | 4 | ✓ Full exchange observed |
| 09-19 04:12 | 40m | -9 / - | HK3W | - / -12 | 9 | Partial capture |
| 09-19 04:09 | 40m | - / - | RN6HK | -4 / - | 3 | Partial capture |
| 09-19 04:08 | 40m | -10 / - | JY5IB | - / -15 | 2 | ✓ Closing fragment |
| 09-19 00:01 | 40m | -9 / -12 | TA2EE | -15 / -13 | 3 | ✓ Full exchange observed |
| 09-18 23:58 | 40m | - / +4 | DL3MIB | -7 / - | 5 | ✓ Closing fragment |
| 09-18 23:56 | 40m | -12 / +2 | FG5FU | -17 / -9 | 3 | Partial capture |
| 09-18 23:47 | 40m | -2 / - | V47YA | - / -5 | 9 | Partial capture |
| 09-18 23:40 | 40m | -1 / - | V47YA | - / -9 | 3 | Partial capture |
| 09-18 23:33 | 40m | -2 / - | V47YA | - / -8 | 6 | Partial capture |
| 09-18 23:27 | 40m | -10 / - | CX3CI | - / -15 | 2 | Partial capture |
| 09-18 23:21 | 40m | -10 / - | CX3CI | - / -13 | 2 | Partial capture |
| 09-18 04:14 | 80m | +2 / -6 | DL5DQZ | +8 / -8 | 3 | ✓ Full exchange observed |
| 09-18 04:12 | 80m | +4 / - | RD7O | - / -16 | 2 | Partial capture |
| 09-18 04:05 | 160m | -5 / - | DG4SCG | - / -19 | 2 | ✓ Closing fragment |
| 09-18 04:02 | 160m | -8 / - | IK2SYK | - / -11 | 2 | ✓ Closing fragment |
| 09-18 03:59 | 160m | -6 / -5 | OM3SX | +4 / -14 | 7 | ✓ Full exchange observed |
| 09-18 03:40 | 160m | +4 / - | K1ZM | - / -19 | 4 | Partial capture |
| 09-18 03:37 | 160m | -5 / - | V26OC | - / -19 | 4 | Partial capture |
| 09-18 03:20 | 160m | +7 / +3 | F1PBZ | -4 / -12 | 4 | ✓ Full exchange observed |
| 09-18 03:17 | 160m | 0 / +4 | OM3SX | +6 / -14 | 6 | ✓ Full exchange observed |
| 09-18 03:06 | 160m | +7 / - | K1ZM | - / -15 | 4 | Partial capture |
| 09-18 03:05 | 160m | - / - | YL2EA | -4 / - | 2 | Partial capture |
| 09-18 03:03 | 160m | - / - | UX7QV | +6 / - | 7 | Partial capture |
| 09-18 02:59 | 160m | - / -4 | DL1VVQ | -15 / - | 6 | Partial capture |
| 09-18 02:59 | 160m | -6 / -4 | RD7O | -1 / -14 | 5 | ✓ Full exchange observed |
| 09-18 02:33 | 40m | -2 / - | W7MG | - / -12 | 3 | Partial capture |
| 09-18 02:29 | 40m | -7 / - | EP2AES | - / -21 | 5 | Partial capture |
| 09-18 02:28 | 40m | -10 / - | 9K2WA | -4 / -7 | 3 | ✓ Closing observed |
| 09-17 05:28 | 40m | -14 / -12 | RA3QBT | -20 / - | 3 | ✓ Closing observed |
| 09-17 05:05 | 60m | -18 / - | DG1ASE | -10 / -15 | 2 | Partial capture |
| 09-17 05:04 | 60m | -16 / - | 6Y5HN | - / -4 | 2 | ✓ Closing fragment |
| 09-17 04:22 | 80m | - / - | ON5HE | +5 / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 030800 +6 2710 OA4ENG EA5JK -16 (x2) 031030 +0 2439 KF0NYL EA5JK -22 (x3) 031245 -13 1447 EA5JK EA5HM IM99 (x2) 031400 +3 2437 CQ EA5JK IM99 031415 +5 2438 EA5JK RY3F -07 031430 -3 1446 EA5HM EA5JK -16 (x3) 031800 +1 2439 RY3F EA5JK R-12 (x3)
UTC dB Audio Message 025100 +3 1478 SV9MBH EA5JK -21 (x8) 025645 -12 1479 EA5JK SV9MBH R-02 025700 +1 1479 SV9MBH EA5JK -22 025715 -13 1479 EA5JK SV9MBH R-01 025730 +3 1478 SV9MBH EA5JK RR73 025745 -9 1478 EA5JK SV9MBH 73 025800 -4 1479 SV9MBH EA5JK RR73 025815 -16 1479 EA5JK SV9MBH 73
UTC dB Audio Message 000945 +7 1042 CQ EA5JK IM99 001000 +2 215 EA5JK RA6OY KN88 001000 -17 1472 EA5JK ON4MAP JO20 001030 -4 215 EA5JK RA6OY KN88 001030 -19 1472 EA5JK ON4MAP JO20 001045 +4 213 RA6OY EA5JK -13 001100 +0 215 EA5JK RA6OY R-06 001115 +3 214 RA6OY EA5JK RR73 001130 -2 215 EA5JK RA6OY 73 001145 +4 1471 ON4MAP EA5JK -16 (x3) 001300 +1 1472 EA5JK ON4MAP 73 001345 +10 1041 DO8JB EA5JK -09 (x2)
UTC dB Audio Message 041600 -7 1142 W0ML EA5JK RR73 044845 -9 2187 EA5JK F5HNQ IN98 044900 -9 1143 CQ EA5JK IM99 (x2) 045000 -12 2187 F5HNQ EA5JK -14 (x7) 050430 -15 1934 6Y5HN EA5JK -04 (x2) 050545 -10 1933 EA5JK DG1ASE JO50 050630 -18 1933 DG1ASE EA5JK -15
UTC dB Audio Message 071445 +5 1555 EA5JK F4LNM 73 071515 -6 369 EA5JK RV3QI KO91 071600 +12 1554 CQ EA5JK IM99 071615 -8 1551 EA5JK RV3KC KO90 071615 -1 739 EA5JK G0JEI -10 071630 +6 1554 CQ EA5JK IM99 071645 +0 1551 EA5JK RV3KC KO90 071645 +4 739 EA5JK G0JEI -10 071715 -5 1551 EA5JK RV3KC KO90 071715 -3 739 EA5JK G0JEI -10 (x2) 002130 -22 1512 EA5JK BG0FQU -09 014645 -10 1970 EA5JK 5Z4VJ KI88 (x3)
UTC dB Audio Message 165130 -21 1955 CQ EA5JK IM99 165145 -14 2146 EA5JK DN9SGE JO42 165200 -14 1955 CQ EA5JK IM99 165215 -13 2146 EA5JK DN9SGE JO42 165230 -15 1955 S55A EA5JK -09 165245 -8 2147 EA5JK DN9SGE JO42 165330 -15 1955 S55A EA5JK RR73 091545 -17 1954 MD0CCE EA5JK -06 091630 -9 832 EA5JK MD0CCE R+25 091645 -15 1954 MD0CCE EA5JK RR73 091700 -8 831 EA5JK MD0CCE 73 092100 -11 1954 PD1ALW EA5JK RR73 094045 -17 1955 SM2LIY EA5JK -16 (x3)
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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