EA5JK — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving EA5JK, decoded by SO8OO in southeastern Poland. 1,308 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, 10m, across 50 UTC dates in the available aggregate history. Observed between 2026-06-07 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 1,308 FT8 messages attributed to EA5JK as the transmitting token by decoded message structure across 50 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (31%), followed by 40 m (27%) 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 (65%); the estimated median was -6 dB.
Overview
Bands
Last attributed message: 2026-09-10 01:43 UTC
Observed FT8 message patterns
- Attributed sample
- 1,308 messages
- Active dates
- 50 UTC dates
- Estimated median S/N
- -6 dB
- Estimated 10th-90th percentile
- -15 to +6.5 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 126, moderate (-15 to -9 dB) 338, strong (≥ -8 dB) 844.
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 · 575 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 2,129 km (approx.)
- Last such locator decoded
- 2026-09-10 01:43 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 |
|---|---|---|---|---|---|---|
| 09-10 01:29 | 80m | - / - | CT7AUT | -21 / - | 3 | Partial capture |
| 09-10 01:29 | 80m | - / - | SN40KZE | +9 / - | 5 | Partial capture |
| 09-10 01:26 | 80m | +3 / -6 | UB6OFG | -14 / -20 | 7 | ✓ Full exchange observed |
| 09-10 01:22 | 80m | - / - | UB6OFG | -7 / - | 3 | Partial capture |
| 09-10 01:20 | 80m | - / - | UG4L | -10 / - | 3 | Partial capture |
| 09-10 01:20 | 80m | +4 / -4 | R5AV | 0 / -22 | 6 | ✓ Full exchange observed |
| 09-10 01:18 | 80m | 0 / -2 | DH5BM | -7 / -17 | 5 | ✓ Full exchange observed |
| 09-10 01:18 | 80m | - / -14 | UA4CCH | -10 / - | 5 | Partial capture |
| 09-06 19:17 | 40m | -3 / -12 | IK2XDE | +6 / - | 4 | ✓ Closing observed |
| 09-06 18:48 | 40m | - / -4 | F1PBZ | 0 / - | 3 | Partial capture |
| 09-06 18:47 | 40m | - / - | OE8PIT | +4 / - | 4 | Partial capture |
| 09-04 05:29 | 40m | -13 / - | AB2RR | - / -13 | 4 | Partial capture |
| 09-04 05:27 | 40m | - / - | F1IQH | -7 / - | 3 | Partial capture |
| 09-04 05:27 | 40m | -10 / - | WF1B | - / -16 | 2 | ✓ Closing fragment |
| 09-04 05:18 | 80m | - / -13 | OM3ZAS | +12 / - | 2 | Partial capture |
| 09-04 05:14 | 80m | - / - | DO1FZL | -8 / - | 2 | Partial capture |
| 09-04 05:13 | 80m | - / - | DL1UDO | -7 / - | 3 | Partial capture |
| 09-04 05:05 | 80m | - / -2 | SN40KZE | +3 / - | 2 | Partial capture |
| 09-04 04:55 | 80m | - / +1 | F1PBZ | +1 / - | 3 | Partial capture |
| 09-04 04:55 | 80m | - / - | IU1TLG | -9 / - | 8 | ✓ Closing fragment |
| 09-02 04:05 | 40m | - / - | SV1DKR | -6 / - | 2 | Partial capture |
| 09-02 04:05 | 40m | -10 / - | N2FSM | - / - | 2 | ✓ Closing fragment |
| 09-02 04:03 | 40m | - / - | RA6HN | -9 / - | 3 | Partial capture |
| 09-02 04:03 | 40m | - / -16 | RC9WC | -13 / - | 3 | Partial capture |
| 09-02 04:03 | 40m | - / - | RX3DCZ | -7 / - | 5 | Partial capture |
| 09-02 04:03 | 40m | - / - | W4CHA | -6 / - | 3 | Partial capture |
| 09-02 04:00 | 40m | -4 / - | E75D | - / -8 | 2 | ✓ Closing fragment |
| 09-02 04:00 | 40m | - / - | TA2EE | -8 / - | 5 | Partial capture |
| 09-02 03:58 | 40m | - / -13 | F1PBZ | -2 / - | 3 | Partial capture |
| 09-02 03:55 | 60m | -12 / - | IU4DTV | -22 / - | 2 | ✓ Closing observed |
| 09-02 03:54 | 60m | - / - | OH3GBW | -1 / - | 3 | Partial capture |
| 09-02 03:52 | 60m | - / - | DL9KM | -14 / - | 2 | Partial capture |
| 09-02 03:52 | 60m | - / - | F5RRS | -9 / - | 4 | Partial capture |
| 09-02 03:50 | 60m | - / - | F1IQH | -2 / - | 3 | Partial capture |
| 09-02 03:49 | 60m | - / - | IK4CBO | -15 / - | 3 | Partial capture |
| 09-02 03:47 | 60m | -14 / +1 | DJ4WM | -8 / - | 4 | ✓ Closing observed |
| 09-02 03:43 | 80m | - / - | G3WGC | -8 / - | 9 | Partial capture |
| 09-02 03:42 | 80m | - / - | YL2EA | -10 / - | 3 | Partial capture |
| 09-02 03:41 | 80m | -4 / - | SP6FME | +6 / -5 | 6 | ✓ Closing observed |
| 09-02 03:41 | 80m | - / - | ON4MAP | -12 / - | 6 | Partial capture |
| 09-02 03:39 | 80m | - / - | SQ3KO | -12 / - | 4 | Partial capture |
| 09-02 03:37 | 80m | - / - | PA1KDB | -21 / - | 7 | Partial capture |
| 09-02 03:37 | 80m | 0 / +3 | SP3HGD | -1 / -17 | 5 | ✓ Full exchange observed |
| 09-02 01:47 | 80m | -2 / 0 | GM6URC | -9 / -6 | 8 | ✓ Full exchange observed |
| 09-02 01:46 | 80m | 0 / -2 | UT3UZ | +5 / -17 | 4 | ✓ Full exchange observed |
| 09-02 01:45 | 80m | -2 / -8 | UX7QV | +6 / -12 | 6 | ✓ Full exchange observed |
| 09-01 05:10 | 40m | -8 / -3 | DL8WEM | +10 / -12 | 3 | ✓ Full exchange observed |
| 09-01 05:01 | 40m | - / - | DL6REX | -10 / - | 9 | Partial capture |
| 09-01 04:58 | 40m | - / - | DM2AB | +5 / - | 4 | Partial capture |
| 09-01 04:56 | 40m | - / - | DL6RS | +9 / - | 9 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 003445 -14 1127 EA5JK IT9SVJ JM68 003515 -10 1703 EA5JK RL3F KO95 003515 -11 1091 EA5JK RA8AO MO06 003545 -13 1703 EA5JK RL3F KO95 003545 -24 1567 EA5JK IT9SVJ JM68 003615 -11 1703 EA5JK RL3F KO95 013945 -5 1290 CQ EA5JK IM99 (x6) 014230 -19 1510 EA5JK UB3PAQ KO84 014245 -5 1290 CQ EA5JK IM99 (x2)
UTC dB Audio Message 012700 -14 1228 EA5JK UB6OFG R-06 012715 +2 1294 UB6OFG EA5JK -20 012730 -13 1228 EA5JK UB6OFG R-06 012745 +2 1294 UB6OFG EA5JK RR73 012800 -14 1228 EA5JK UB6OFG 73 012815 +4 1294 UB6OFG EA5JK RR73 012845 +4 1294 CQ EA5JK IM99 a1 012900 -20 1506 EA5JK CT7AUT IM67 012900 +9 2273 <EA5JK> SN40KZE 012930 -19 1506 EA5JK CT7AUT IM67 012930 +4 2273 <EA5JK> SN40KZE 013000 -24 1506 EA5JK CT7AUT IM67 013030 +8 2273 EA5JK SN40KZE (x3)
UTC dB Audio Message 184945 +0 2640 EA5JK F1PBZ -04 185000 -6 1525 CQ EA5JK IM99 (x2) 185115 -2 2317 EA5JK G4DBW JO01 185215 +0 829 EA5JK PD0IFI JO32 191730 +5 1526 EA5JK IK2XDE JN45 191800 +0 362 EA5JK EA3HMM JN00 191800 +5 1526 EA5JK IK2XDE R-12 191815 -3 1526 IK2XDE EA5JK RR73 191830 +8 1526 EA5JK IK2XDE 73 011145 -10 1333 CQ EA5JK IM99 (x3) 011345 -9 1328 W1XI EA5JK RR73 011400 -10 1328 CQ EA5JK IM99
UTC dB Audio Message 035245 -8 1956 EA5JK F5RRS JN36 035300 -10 1522 CQ EA5JK IM99 035315 -7 1956 EA5JK F5RRS JN36 035330 -7 1522 CQ EA5JK IM99 035345 -13 1956 EA5JK F5RRS JN36 035400 -8 1523 CQ EA5JK IM99 035415 -7 1956 EA5JK F5RRS JN36 035415 -13 1245 EA5JK DL9KM JN68 035430 -7 1523 CQ EA5JK IM99 035445 +0 771 EA5JK OH3GBW KP21 035500 -8 1523 CQ EA5JK IM99 035515 -2 771 EA5JK OH3GBW KP21 (x2) 035545 -22 1524 EA5JK IU4DTV RR73 035600 -12 1523 IU4DTV EA5JK 73
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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