F4JJA — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving F4JJA, decoded by SO8OO in southeastern Poland. 583 FT8 messages attributed to this token as transmitter, on 40m, across 31 UTC dates in the available aggregate history. Observed between 2026-07-09 and 2026-10-16.
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 583 FT8 messages attributed to F4JJA as the transmitting token by decoded message structure across 31 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). Several six-hour UTC windows tied for the largest share (98%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.
Overview
Observed FT8 message patterns
- Attributed sample
- 583 messages
- Active dates
- 31 UTC dates
- Estimated median S/N
- -9 dB
- Estimated 10th-90th percentile
- -16 to -1.1 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 67, moderate (-15 to -9 dB) 233, strong (≥ -8 dB) 283.
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 F4JJA 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 F4JJA
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
- JN09 · 378 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,491 km (approx.)
- Last such locator decoded
- 2026-10-16 05:34 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 | F4JJA S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-17 04:30 | 40m | - / - | RX3ASQ | -17 / - | 2 | Partial capture |
| 10-16 05:24 | 40m | -3 / - | K1RZ | - / -13 | 3 | Partial capture |
| 10-16 04:45 | 40m | - / -10 | UR3HC | -2 / - | 2 | ✓ Closing fragment |
| 10-16 04:39 | 40m | - / -17 | US0QV | -8 / - | 3 | ✓ Closing fragment |
| 10-15 04:51 | 40m | - / -10 | SV5BYP | -11 / - | 5 | ✓ Closing fragment |
| 10-14 05:07 | 40m | -7 / - | KB2TDH | - / -22 | 3 | ✓ Closing fragment |
| 10-12 05:51 | 40m | - / - | DL2NYC | -6 / - | 3 | ✓ Closing fragment |
| 10-10 05:41 | 40m | -15 / - | K9ATX | - / -24 | 3 | ✓ Closing fragment |
| 10-10 05:39 | 40m | -12 / - | W1FAM | - / - | 2 | Partial capture |
| 10-10 05:15 | 40m | - / -10 | LY4Q | -5 / - | 3 | ✓ Closing fragment |
| 10-09 05:30 | 40m | -14 / - | N4HFE | - / - | 2 | Partial capture |
| 10-09 05:19 | 40m | -8 / - | KE9ZZ | - / - | 2 | Partial capture |
| 10-09 05:15 | 40m | 0 / - | YY5EHT | - / -12 | 2 | ✓ Closing fragment |
| 10-09 05:13 | 40m | -2 / - | N4MMR | - / -19 | 4 | ✓ Closing fragment |
| 10-09 05:08 | 40m | -2 / - | W5GDC | - / - | 2 | Partial capture |
| 10-09 05:05 | 40m | +2 / - | K5RJM | - / -24 | 5 | ✓ Closing fragment |
| 10-08 06:20 | 40m | -18 / - | K3RH | - / -16 | 2 | ✓ Closing fragment |
| 10-08 06:18 | 40m | -19 / - | KZ4AU | - / -24 | 3 | Partial capture |
| 10-04 17:12 | 40m | - / - | PA3BRB | 0 / - | 2 | ✓ Closing fragment |
| 09-16 05:51 | 40m | -16 / - | K2ZJ | - / - | 2 | ✓ Closing fragment |
| 09-15 05:59 | 40m | -14 / - | KB5YNF | - / - | 2 | Partial capture |
| 09-15 05:56 | 40m | -12 / - | KC5OCH | - / - | 3 | Partial capture |
| 09-15 05:47 | 40m | -15 / - | AC8MR | - / -23 | 2 | ✓ Closing fragment |
| 09-14 05:48 | 40m | -13 / - | NF3R | - / -17 | 5 | ✓ Closing fragment |
| 09-14 05:42 | 40m | -16 / - | W4MAA | - / -12 | 2 | ✓ Closing fragment |
| 09-14 05:33 | 40m | -13 / - | AD9GE | - / -17 | 3 | ✓ Closing fragment |
| 09-14 05:27 | 40m | -14 / - | RA6OY | -1 / -22 | 7 | Partial capture |
| 09-12 06:28 | 40m | -6 / - | DL8WEM | +11 / - | 2 | ✓ Closing observed |
| 09-12 06:26 | 40m | - / - | F4BYA | -1 / - | 3 | Partial capture |
| 09-12 06:24 | 40m | -9 / - | KC0VTJ | - / - | 2 | Partial capture |
| 09-12 06:15 | 40m | -11 / -2 | F4ITK | -10 / +2 | 5 | ✓ Full exchange observed |
| 09-12 06:07 | 40m | - / -7 | SP4MPH | -10 / - | 2 | ✓ Closing fragment |
| 09-11 05:55 | 40m | -3 / - | KD3CMN | - / - | 2 | Partial capture |
| 09-11 05:40 | 40m | -10 / -4 | G7IGN | -6 / - | 4 | ✓ Closing observed |
| 09-09 05:31 | 40m | - / - | UR4QWW | -12 / - | 4 | Partial capture |
| 09-09 05:30 | 40m | -14 / - | NU1T | - / -12 | 3 | ✓ Closing fragment |
| 09-09 05:16 | 40m | -4 / - | W3CRZ | - / - | 2 | Partial capture |
| 09-08 05:49 | 40m | -18 / - | KF0KPA | - / -12 | 2 | ✓ Closing fragment |
| 09-08 05:28 | 40m | -1 / - | KR8MR | - / - | 3 | Partial capture |
| 09-08 05:21 | 40m | -8 / - | KR4EOD | - / - | 2 | Partial capture |
| 09-08 05:02 | 40m | -20 / - | K8GIB | - / - | 2 | Partial capture |
| 09-08 05:00 | 40m | -15 / - | KR4EOD | - / - | 2 | Partial capture |
| 09-07 05:37 | 40m | - / - | F4BYA | +8 / - | 3 | Partial capture |
| 09-07 05:35 | 40m | -9 / - | KS2D | - / - | 2 | Partial capture |
| 09-07 05:28 | 40m | -8 / - | UA3UBV/1 | - / -9 | 3 | Partial capture |
| 09-07 05:27 | 40m | -8 / - | F5ILV | - / -1 | 2 | ✓ Closing fragment |
| 09-07 05:21 | 40m | - / -12 | DB1TH | +4 / - | 3 | Partial capture |
| 09-07 05:14 | 40m | -5 / - | KS1WK | - / -14 | 6 | ✓ Closing fragment |
| 09-07 05:11 | 40m | -4 / - | WB8UPO | - / - | 2 | Partial capture |
| 09-07 05:05 | 40m | -6 / - | W4ETA | - / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 044000 -7 990 F4JJA US0QV R-20 (x2) 044500 -4 1227 F4JJA UR3HC -10 (x2) 050815 +3 2277 N4DWD F4JJA 73 051015 +3 2457 CQ F4JJA JN09 051600 -10 2457 K0LLT F4JJA JN09 051745 -2 2456 AA3DP F4JJA JN09 052415 -2 2456 K1RZ F4JJA JN09 (x3) 052945 -3 2456 AG6X F4JJA JN09 053430 -8 2182 K8TUK F4JJA JN09 043045 -20 1397 F4JJA RX3ASQ KO95 (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.
FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee