4J3DJ — 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 4J3DJ, decoded by SO8OO in southeastern Poland. 679 FT8 messages attributed to this token as transmitter, on 160m, 40m, across 4 UTC dates in the available aggregate history. Observed between 2026-10-13 and 2026-10-17.
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 679 FT8 messages attributed to 4J3DJ as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (94%), followed by 40 m (6%). Most decodes (100%) fell within the six-hour window 18:00-00:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (62%); the estimated median was -6 dB.
Overview
Bands
Last attributed message: 2026-10-17 21:56 UTC
Observed FT8 message patterns
- Attributed sample
- 679 messages
- Active dates
- 4 UTC dates
- Estimated median S/N
- -6 dB
- Estimated 10th-90th percentile
- -15 to +1 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 64, moderate (-15 to -9 dB) 193, strong (≥ -8 dB) 422.
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 4J3DJ 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 4J3DJ
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
- LN30 · 136 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 2,221 km (approx.)
- Last such locator decoded
- 2026-10-17 21:56 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 | 4J3DJ S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-17 21:54 | 160m | - / - | SQ3M | +8 / - | 4 | Partial capture |
| 10-17 21:51 | 160m | -1 / - | DK2EU | +5 / +5 | 6 | ✓ Closing observed |
| 10-17 21:51 | 160m | +2 / -18 | DD7EE | -11 / - | 6 | ✓ Closing observed |
| 10-17 21:50 | 160m | +1 / - | IZ3EAY | -11 / - | 2 | ✓ Closing observed |
| 10-17 21:44 | 160m | - / -1 | SQ4KDM | +12 / - | 3 | Partial capture |
| 10-17 21:43 | 160m | - / -9 | HA6NN | +2 / - | 9 | Partial capture |
| 10-17 21:43 | 160m | -2 / - | DK1AQ | -8 / -16 | 16 | Partial capture |
| 10-17 21:41 | 160m | -8 / -19 | IW5DNZ | -3 / +1 | 4 | ✓ Full exchange observed |
| 10-17 21:39 | 160m | -6 / - | SQ9KDO | - / -14 | 2 | Partial capture |
| 10-17 21:38 | 160m | -8 / -2 | IZ8HUJ | -4 / - | 3 | ✓ Closing observed |
| 10-17 21:38 | 160m | - / - | SM6LRY | -12 / - | 2 | Partial capture |
| 10-17 21:36 | 160m | -14 / -14 | S56ECR | -10 / -1 | 4 | ✓ Full exchange observed |
| 10-17 21:32 | 160m | - / +7 | UA7K | +6 / - | 2 | ✓ Closing fragment |
| 10-17 21:28 | 160m | -14 / -16 | IK6FWJ | +7 / -6 | 4 | ✓ Full exchange observed |
| 10-17 21:26 | 160m | -16 / -11 | SO5WD | -11 / - | 4 | ✓ Closing observed |
| 10-17 21:23 | 160m | -14 / -13 | IS0JHQ | -9 / -18 | 6 | ✓ Full exchange observed |
| 10-17 21:18 | 160m | - / - | IK6FWJ | +7 / - | 5 | Partial capture |
| 10-17 21:17 | 160m | -16 / - | UA9OR | -23 / -6 | 2 | Partial capture |
| 10-17 21:17 | 160m | - / - | SO5WD | -1 / - | 2 | Partial capture |
| 10-17 21:16 | 160m | -17 / -17 | UN7LZ | -21 / - | 3 | ✓ Closing observed |
| 10-17 21:08 | 160m | -17 / - | HA6NN | +6 / -17 | 8 | Partial capture |
| 10-17 21:07 | 160m | -9 / - | JM4WUZ | - / -18 | 4 | ✓ Closing fragment |
| 10-17 21:05 | 160m | -8 / - | JA4HDO | - / -18 | 2 | ✓ Closing fragment |
| 10-17 21:04 | 160m | -6 / - | RU3ACA | 0 / -15 | 3 | ✓ Closing observed |
| 10-17 21:04 | 160m | - / -3 | IZ8HUJ | -7 / - | 3 | Partial capture |
| 10-17 21:02 | 160m | -9 / -15 | DF8FT | -5 / - | 13 | ✓ Closing observed |
| 10-17 21:01 | 160m | - / - | HA6NN | 0 / - | 2 | Partial capture |
| 10-17 21:00 | 160m | - / - | IV3GHY | +15 / - | 3 | Partial capture |
| 10-17 20:59 | 160m | -12 / - | UA0LQE | - / -16 | 2 | Partial capture |
| 10-17 20:57 | 160m | -10 / - | JA4KDT | - / -10 | 2 | ✓ Closing fragment |
| 10-17 20:57 | 160m | - / - | SQ3M | +7 / - | 10 | Partial capture |
| 10-17 20:55 | 160m | - / - | DJ0CL | +5 / - | 5 | Partial capture |
| 10-17 20:54 | 160m | -11 / -17 | RU9F | -11 / - | 6 | ✓ Closing observed |
| 10-17 20:52 | 160m | - / - | OM2WW | +8 / - | 2 | Partial capture |
| 10-17 20:51 | 160m | - / - | RT6Z | -10 / - | 2 | Partial capture |
| 10-17 20:51 | 160m | -12 / - | RL9F | -2 / - | 4 | ✓ Closing observed |
| 10-17 20:48 | 160m | -8 / - | JA5NLN | - / -12 | 2 | ✓ Closing fragment |
| 10-17 20:48 | 160m | - / - | OH5BM | -24 / - | 2 | Partial capture |
| 10-17 20:48 | 160m | -10 / -2 | SP7Y | +8 / -14 | 5 | ✓ Full exchange observed |
| 10-17 20:47 | 160m | -8 / -6 | RA6SA | -9 / -19 | 5 | ✓ Full exchange observed |
| 10-17 20:47 | 160m | - / - | S57BTI | -4 / - | 2 | Partial capture |
| 10-17 20:46 | 160m | - / - | DL4KSD | -16 / - | 2 | Partial capture |
| 10-17 20:46 | 160m | -8 / -7 | RK3AW | -6 / -15 | 6 | Partial capture |
| 10-17 20:46 | 160m | - / - | SM5ACQ | -19 / - | 4 | Partial capture |
| 10-17 20:45 | 160m | -2 / - | JH4GOE | - / -15 | 2 | ✓ Closing fragment |
| 10-17 20:45 | 160m | - / - | SQ3M | +3 / - | 12 | Partial capture |
| 10-17 20:44 | 160m | -5 / - | JH0BQX | - / -17 | 2 | ✓ Closing fragment |
| 10-17 20:43 | 160m | -4 / - | JE4NAN | - / -15 | 2 | ✓ Closing fragment |
| 10-17 20:43 | 160m | - / - | SP7Y | +7 / - | 3 | Partial capture |
| 10-17 20:42 | 160m | -1 / -3 | OH3JP | -2 / +5 | 12 | ✓ Full exchange observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 233115 +1 478 4J3DJ F6FDY JN33 043445 +8 2898 4J3DJ R5AV -12 (x2) 044645 -4 2935 4J3DJ RA3XDX KO85 045115 -21 2087 4J3DJ RW3XZ KO85 (x3) 045645 +4 2475 4J3DJ YO9CSM KN23 (x6) 050345 -13 884 4J3DJ R6MO R-02 001445 -20 1649 4J3DJ 2E0GSZ IO94
UTC dB Audio Message 215200 -13 851 4J3DJ DD7EE JO41 215230 +8 2626 4J3DJ DK2EU JO31 215230 -15 851 4J3DJ DD7EE R-11 215245 +2 2627 DD7EE 4J3DJ RR73 215300 -11 850 4J3DJ DD7EE 73 215315 -1 2628 DK2EU 4J3DJ +05 215330 +6 2626 4J3DJ DK2EU JO31 215430 +7 2522 4J3DJ SQ3M JO81 215430 +10 2626 4J3DJ DK2EU 73 215500 +6 2522 4J3DJ SQ3M JO81 215500 -1 2627 4J3DJ F5NZ IN94 215530 +11 2522 4J3DJ SQ3M JO81 (x2) 215615 -2 2429 CQ 4J3DJ LN30 215645 -4 2429 MW9LQA 4J3DJ -09
UTC dB Audio Message 143445 -12 1949 4J3DJ CR7CDC IM59 144215 -7 2141 4J3DJ EA7GUK IM77 (x4) 150415 -18 1949 4J3DJ CR7CDC IM59 150515 -20 1954 4J3DJ CT4KQ IN60 (x3) 150745 -9 1482 4J3DJ EA7GHD IM66 (x4) 151315 -23 1952 4J3DJ CR7CDR IM58 (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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