OE3CJB — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving OE3CJB, decoded by SO8OO in southeastern Poland. 121 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-07-24 and 2026-09-06.
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 121 FT8 messages attributed to OE3CJB as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (98%), followed by 20 m (2%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (88%); the estimated median was -4 dB.
Overview
Bands
Last attributed message: 2026-09-06 07:16 UTC
Observed FT8 message patterns
- Attributed sample
- 121 messages
- Active dates
- 3 UTC dates
- Estimated median S/N
- -4 dB
- Estimated 10th-90th percentile
- -9 to +5 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 12, strong (≥ -8 dB) 107.
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 OE3CJB 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 OE3CJB
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
- JN78 · 47 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 518 km (approx.)
- Last such locator decoded
- 2026-09-06 07:13 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 | OE3CJB S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-06 07:13 | 40m | 0 / +6 | OE4BHF | -3 / 0 | 5 | ✓ Full exchange observed |
| 09-06 07:09 | 40m | -5 / -5 | DK6WH | +3 / +6 | 4 | ✓ Full exchange observed |
| 09-06 07:08 | 40m | -8 / - | SO100PKP | - / - | 2 | Partial capture |
| 09-06 07:05 | 40m | -9 / -9 | OE/DG7CF | +1 / - | 2 | Partial capture |
| 09-06 07:02 | 40m | -6 / - | OE4BHF | - / - | 3 | Partial capture |
| 09-06 07:00 | 40m | -1 / -4 | 3Z100LKK | -5 / -13 | 3 | Partial capture |
| 09-06 06:59 | 40m | +4 / - | OZ7SKB/P | - / - | 2 | Partial capture |
| 09-06 06:55 | 40m | -5 / -2 | DK0LI/P | -2 / +10 | 7 | ✓ Full exchange observed |
| 09-06 06:54 | 40m | -6 / - | DA1TE | -11 / - | 2 | ✓ Closing observed |
| 09-06 06:50 | 40m | -5 / - | F1LPT/P | - / -13 | 5 | ✓ Closing fragment |
| 09-06 06:49 | 40m | 0 / -10 | DJ9KM | -17 / -6 | 3 | ✓ Full exchange observed |
| 09-06 06:44 | 40m | -4 / - | F1LPT/P | - / - | 4 | Partial capture |
| 09-06 06:43 | 40m | -3 / -7 | SO100PKP | -10 / -5 | 2 | Partial capture |
| 09-06 06:41 | 40m | -7 / -10 | DL3TA | -4 / +4 | 5 | ✓ Full exchange observed |
| 09-06 06:40 | 40m | -7 / -8 | S55A | -14 / -1 | 5 | ✓ Full exchange observed |
| 09-06 06:38 | 40m | -6 / - | PE1NAO | - / -10 | 3 | ✓ Closing fragment |
| 09-06 06:37 | 40m | +3 / - | OO0O | - / -12 | 2 | ✓ Closing fragment |
| 09-06 06:35 | 40m | -6 / -13 | F4LVF | -6 / -1 | 4 | ✓ Full exchange observed |
| 09-06 06:33 | 40m | -6 / - | EW7BBI | -7 / -15 | 3 | ✓ Closing observed |
| 09-06 06:32 | 40m | -6 / -4 | IU2SLI | -15 / -3 | 2 | Partial capture |
| 09-06 06:30 | 40m | -5 / 0 | Z62NS | -8 / -3 | 5 | ✓ Full exchange observed |
| 09-06 06:28 | 40m | +3 / -11 | PA0KGB | -4 / -9 | 5 | ✓ Full exchange observed |
| 09-05 07:43 | 40m | -7 / -14 | PD1AC | -13 / -2 | 6 | ✓ Full exchange observed |
| 09-05 07:39 | 40m | -5 / - | HB9HDK | - / -13 | 7 | ✓ Closing fragment |
| 09-05 07:38 | 40m | +3 / - | T77NC | - / -5 | 2 | ✓ Closing fragment |
| 09-05 07:36 | 40m | +7 / - | IK2WJT | - / +8 | 3 | ✓ Closing fragment |
| 09-05 07:25 | 40m | +7 / -11 | E79KO | -6 / -7 | 4 | ✓ Full exchange observed |
| 09-05 07:23 | 40m | +6 / -13 | EU4U | +4 / -8 | 4 | ✓ Full exchange observed |
| 09-05 07:20 | 40m | -8 / -6 | DM2GG | -16 / -17 | 4 | ✓ Full exchange observed |
| 09-05 07:10 | 40m | -4 / - | OH8D | - / -16 | 3 | Partial capture |
| 09-05 07:07 | 40m | -10 / - | M1DBW | - / -8 | 3 | ✓ Closing fragment |
| 09-05 07:05 | 40m | +4 / 0 | DF0AWG | +3 / 0 | 5 | ✓ Full exchange observed |
| 09-05 07:02 | 40m | -8 / -15 | DL2VN | -4 / +2 | 4 | ✓ Full exchange observed |
| 09-05 06:57 | 40m | - / - | ON8XT | -9 / - | 2 | ✓ Closing fragment |
| 09-05 06:55 | 40m | -3 / - | PD0WH | -19 / - | 2 | ✓ Closing observed |
| 09-05 06:47 | 40m | 0 / -19 | F4FQY | -10 / -6 | 4 | ✓ Full exchange observed |
| 09-05 06:45 | 40m | +3 / +9 | SN40KZE | +8 / +9 | 3 | Partial capture |
| 09-05 06:42 | 40m | +6 / - | YO3GNF | +3 / -13 | 4 | ✓ Closing observed |
| 09-05 06:41 | 40m | +9 / +10 | S57TW | +14 / +6 | 5 | ✓ Full exchange observed |
| 09-05 06:37 | 40m | -8 / -5 | F4DIA | -18 / +2 | 4 | ✓ Full exchange observed |
| 09-05 06:36 | 40m | -5 / -20 | R3XBS | -15 / -17 | 5 | Partial capture |
| 09-05 06:35 | 40m | -6 / -13 | SQ9SET | 0 / +10 | 5 | ✓ Full exchange observed |
| 09-05 06:33 | 40m | -5 / - | F1UNR | - / -6 | 4 | ✓ Closing fragment |
| 08-31 18:55 | 20m | - / -17 | EA8UP | +6 / - | 7 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 070345 -3 1896 OE4BHF OE3CJB JN78 070500 +1 1500 OE3CJB OE/DG7CF -09 070515 -9 1500 OE/DG7CF OE3CJB R+11 070845 -8 1940 SO100PKP OE3CJB JN78 (x2) 070945 -6 1177 DK6WH OE3CJB JN78 071000 +3 1177 OE3CJB DK6WH -05 071015 -5 1177 DK6WH OE3CJB R+06 (x2) 071145 -7 1588 IK2IPY OE3CJB JN78 071345 -2 1199 OE4BHF OE3CJB JN78 071530 -3 1198 OE3CJB OE4BHF +06 071545 +2 1199 OE4BHF OE3CJB R+00 071600 -3 1198 OE3CJB OE4BHF RR73 071615 +1 1198 OE4BHF OE3CJB 73
UTC dB Audio Message 102915 -21 2176 SP9CTR OE3CJB 73 103045 -13 2373 SQ8AA OE3CJB JN78 103930 -24 1410 OZ1IIO OE3CJB JN78 185245 +9 2457 OE3CJB EA1A RR73 185530 +8 1175 OE3CJB EA8UP -17 (x7)
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.
FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee