JA4FKX — 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 JA4FKX, decoded by SO8OO in southeastern Poland. 2,020 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 92 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-11-04.
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 2,020 FT8 messages attributed to JA4FKX as the transmitting token by decoded message structure across 92 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (56%), followed by 40 m (39%) and 80 m (5%). Most decodes (98%) fell within the six-hour window 16:00-22:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -7 dB.
Overview
Bands
Last attributed message: 2026-11-04 21:01 UTC
Observed FT8 message patterns
- Attributed sample
- 2,020 messages
- Active dates
- 92 UTC dates
- Estimated median S/N
- -7 dB
- Estimated 10th-90th percentile
- -15 to +7 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 190, moderate (-15 to -9 dB) 620, strong (≥ -8 dB) 1,210.
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 JA4FKX 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 JA4FKX
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
- PM64 · 867 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,453 km (approx.)
- Last such locator decoded
- 2026-11-04 21:01 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 | JA4FKX S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 11-05 19:11 | 40m | - / - | HB0PA | -6 / - | 2 | Partial capture |
| 11-04 21:00 | 80m | - / - | RX3ASQ | +2 / - | 2 | Partial capture |
| 11-04 20:59 | 80m | - / - | SQ8MSX | -4 / - | 3 | Partial capture |
| 11-04 19:04 | 80m | - / -18 | 3Z0SYBIR | +12 / - | 2 | Partial capture |
| 11-04 19:02 | 80m | - / -16 | 6W/IK2HKT | +15 / - | 3 | Partial capture |
| 11-04 19:02 | 80m | - / - | IK5SRB | +15 / - | 8 | Partial capture |
| 11-04 19:01 | 80m | - / - | IZ7NLJ | -3 / - | 5 | Partial capture |
| 11-04 18:49 | 80m | - / - | IK5CHL | +2 / - | 5 | Partial capture |
| 11-04 18:49 | 80m | - / -10 | LZ2KV | +10 / - | 4 | ✓ Closing fragment |
| 11-04 18:44 | 80m | - / - | DK5SO | +4 / - | 5 | Partial capture |
| 11-04 18:42 | 80m | - / -2 | LZ1GC | +12 / - | 3 | ✓ Closing fragment |
| 11-03 21:10 | 80m | -5 / - | GU4WRP | - / - | 2 | Partial capture |
| 11-03 21:02 | 80m | - / - | IK5SRB | +12 / - | 5 | Partial capture |
| 11-03 19:15 | 40m | - / -4 | SV4TTE | -1 / - | 2 | ✓ Closing fragment |
| 11-03 18:47 | 40m | -12 / - | 3V8LL | - / - | 2 | Partial capture |
| 11-03 18:43 | 40m | - / - | DL1RB | -2 / - | 8 | Partial capture |
| 11-03 18:42 | 40m | -10 / - | 3V8LL | - / - | 4 | Partial capture |
| 11-03 18:27 | 80m | - / - | UA6BRD | -9 / - | 3 | Partial capture |
| 11-03 18:26 | 80m | - / -24 | SM7GIB | -2 / - | 12 | Partial capture |
| 11-03 18:16 | 80m | - / - | YO9FQT | -21 / - | 2 | Partial capture |
| 11-03 18:14 | 80m | - / - | PE0JBE | -19 / - | 3 | Partial capture |
| 11-03 18:14 | 80m | - / - | SP2DW | -6 / - | 10 | Partial capture |
| 11-03 18:14 | 80m | - / - | SQ2BXI | -13 / - | 3 | Partial capture |
| 11-03 18:13 | 80m | - / - | SP4SKN | +6 / - | 6 | Partial capture |
| 11-03 18:09 | 80m | - / - | R3GW | -4 / - | 2 | Partial capture |
| 11-03 18:08 | 80m | - / - | R9FE | -6 / - | 3 | Partial capture |
| 11-03 18:08 | 80m | - / - | R2UZ | -15 / - | 3 | Partial capture |
| 11-03 18:07 | 80m | -12 / -7 | SP6JZL | +6 / - | 5 | ✓ Closing observed |
| 11-03 18:07 | 80m | - / - | R2DP | -6 / - | 2 | Partial capture |
| 11-03 18:07 | 80m | - / - | RO2X | -3 / - | 2 | Partial capture |
| 11-03 18:06 | 80m | - / - | R3GW | -2 / - | 2 | Partial capture |
| 11-03 17:44 | 80m | - / - | DO9SAM | +12 / - | 2 | Partial capture |
| 11-03 17:43 | 80m | - / - | HB9ALO | -8 / - | 2 | Partial capture |
| 11-03 17:41 | 80m | -15 / -9 | YO2MAX | +8 / -13 | 4 | ✓ Full exchange observed |
| 11-03 17:40 | 80m | - / - | R1CL | -7 / - | 2 | Partial capture |
| 11-03 17:35 | 80m | - / - | HB9ALO | -10 / - | 4 | Partial capture |
| 11-03 17:33 | 80m | - / - | IS0JHQ | +7 / - | 3 | Partial capture |
| 11-03 17:33 | 80m | - / -14 | OH7XI | +4 / - | 2 | ✓ Closing fragment |
| 11-03 17:29 | 80m | -17 / -23 | 9A2AJ | +2 / -24 | 7 | ✓ Full exchange observed |
| 11-02 20:58 | 80m | - / - | LA1SDX | -10 / - | 2 | Partial capture |
| 11-02 20:58 | 80m | -14 / - | HA5UA | - / - | 2 | Partial capture |
| 11-02 20:23 | 80m | - / -14 | IW1GEU | +13 / - | 2 | Partial capture |
| 11-02 20:22 | 80m | -10 / -18 | 9A3TR | +25 / - | 4 | Partial capture |
| 11-02 20:00 | 80m | - / -11 | 9A5GG | +4 / - | 4 | Partial capture |
| 11-02 19:50 | 80m | - / -20 | G4CDN | +5 / - | 3 | Partial capture |
| 11-02 19:48 | 80m | -6 / -10 | IU3ISK | +6 / - | 5 | ✓ Closing observed |
| 11-02 19:48 | 80m | - / - | DL8UNO | +9 / - | 3 | Partial capture |
| 11-02 19:46 | 80m | - / -14 | G4CDN | +9 / - | 3 | Partial capture |
| 11-02 19:46 | 80m | - / - | OM1AIT | +9 / - | 11 | Partial capture |
| 11-02 19:45 | 80m | -10 / - | DK9NP | - / - | 6 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 184500 -2 1039 JA4FKX DL1RB JO41 (x3) 184745 -10 907 3V8LL JA4FKX PM64 184800 -8 1040 JA4FKX DL1RB JO41 184815 -13 906 3V8LL JA4FKX PM64 184830 -8 1039 JA4FKX DL1RB JO41 191515 -2 1456 JA4FKX SV4TTE -04 (x2) 170245 -24 2021 R4HNX/P JA4FKX PM64 191000 -4 284 JA4FKX F5OYA/P -08 191130 -4 1713 JA4FKX HB0PA JN47 (x2) 202100 -17 1405 JA4FKX IW2AFC JN45 203800 +4 2805 JA4FKX DC3TI JN38
UTC dB Audio Message 190445 +9 587 JA4FKX 3Z0SYBIR -18 190515 +12 914 JA4FKX IK5SRB JN63 (x2) 205900 -14 285 CQ EU JA4FKX PM64 205915 -1 285 JA4FKX SQ8MSX KO11 205915 -3 1590 JA4FKX IS0LAY JM49 205930 -12 285 CQ EU JA4FKX PM64 205945 -4 285 JA4FKX SQ8MSX KO11 210000 -13 285 CQ EU JA4FKX PM64 210015 +10 285 JA4FKX DL1HTY JO61 210030 -14 285 CQ EU JA4FKX PM64 210045 -8 284 JA4FKX SQ8MSX KO11 210045 +1 1595 JA4FKX RX3ASQ KO95 210100 -8 285 CQ EU JA4FKX PM64 210115 +3 1595 JA4FKX RX3ASQ KO95
UTC dB Audio Message 173700 -11 1016 JA4FKX DL2MEL JN58 (x2)
UTC dB Audio Message 191115 -7 1372 F4DXP JA4FKX 73 202330 -2 2732 EA7FPF JA4FKX PM64 202730 -19 1984 EA5JLN JA4FKX PM64 (x2) 204145 -3 2937 F5NKX JA4FKX PM64 204200 +9 2933 JA4FKX F5NKX -11 204215 -6 2937 F5NKX JA4FKX R-17 204230 +1 2933 JA4FKX F5NKX RR73 204245 -5 2937 F5NKX JA4FKX 73 154930 -7 2439 DF2AM JA4FKX PM64 (x2) 155300 -10 1379 YO8RCA JA4FKX 73 155315 +5 1061 JA4FKX RU6FK -10 (x3)
UTC dB Audio Message 092030 -4 721 JA4FKX F4ETS JN25 (x3) 092330 -4 719 JA4FKX LZ3BS KN22 (x3) 092730 -12 721 JA4FKX F5BZB -01 094300 +12 556 JA4FKX Z34K -10 (x2) 094630 -21 1562 JA4FKX EA8AP -08 (x2) 095000 -23 1638 JA4FKX F4IBJ R-15 (x2) 083730 -9 2677 JA4FKX IK3VZO RR73 (x2)
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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