F4JCU — 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 F4JCU, decoded by SO8OO in southeastern Poland. 2,964 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, 10m, across 113 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-21.
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 2,964 FT8 messages attributed to F4JCU as the transmitting token by decoded message structure across 113 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (43%), followed by 40 m (37%) and 80 m (13%). Most decodes (57%) fell within the six-hour window 01:00-07:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.
Overview
Bands
Last attributed message: 2026-10-21 05:55 UTC
Observed FT8 message patterns
- Attributed sample
- 2,964 messages
- Active dates
- 113 UTC dates
- Estimated median S/N
- -9 dB
- Estimated 10th-90th percentile
- -19 to +2 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 685, moderate (-15 to -9 dB) 912, strong (≥ -8 dB) 1,367.
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 F4JCU 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 F4JCU
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
- JN16 · 2,182 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,439 km (approx.)
- Last such locator decoded
- 2026-10-21 05:55 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 | F4JCU S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-21 05:51 | 80m | -10 / -5 | DA125RH | -3 / -4 | 7 | Partial capture |
| 10-21 05:41 | 40m | -9 / - | SV7BAY | - / - | 2 | Partial capture |
| 10-21 05:35 | 40m | -6 / - | C5R | - / -11 | 3 | ✓ Closing fragment |
| 10-21 05:31 | 40m | -5 / - | XE1DEZ | - / - | 4 | Partial capture |
| 10-20 05:43 | 40m | -10 / - | KS1WK | - / - | 3 | Partial capture |
| 10-20 05:37 | 40m | -6 / - | VE2LBI | - / - | 6 | Partial capture |
| 10-20 03:55 | 40m | -7 / - | AK8A | - / - | 3 | Partial capture |
| 10-20 03:53 | 40m | -10 / - | W2KOT | - / -17 | 2 | ✓ Closing fragment |
| 10-20 03:48 | 40m | -3 / - | N0YO | - / -15 | 4 | Partial capture |
| 10-19 04:33 | 80m | - / - | DJ7XY | -13 / - | 2 | Partial capture |
| 10-19 04:30 | 80m | -11 / - | WP3GW | - / - | 4 | Partial capture |
| 10-17 15:54 | 40m | -9 / - | IQ3TR | -4 / - | 4 | ✓ Closing observed |
| 10-17 15:42 | 40m | -11 / - | IK3/UY7LA | - / - | 11 | Partial capture |
| 10-17 15:36 | 40m | -6 / - | IK3/UY7LA | - / - | 2 | Partial capture |
| 10-17 06:24 | 60m | -15 / -5 | IQ3TR | -10 / - | 10 | Partial capture |
| 10-17 05:57 | 60m | -14 / +5 | EG46PPA | -19 / -3 | 4 | Partial capture |
| 10-16 19:02 | 60m | -8 / -3 | IQ3TR | -5 / -13 | 12 | ✓ Full exchange observed |
| 10-14 06:08 | 40m | - / -12 | IQ3TR | 0 / - | 2 | ✓ Closing fragment |
| 10-11 23:06 | 80m | - / -8 | IZ8XXE | -7 / - | 2 | ✓ Closing fragment |
| 10-11 19:29 | 80m | -12 / -10 | IQ8DO | +5 / - | 3 | Partial capture |
| 10-11 19:21 | 80m | -9 / -11 | IZ8DFO | -5 / -13 | 4 | ✓ Full exchange observed |
| 10-11 19:10 | 80m | - / -11 | IZ8XQC | +7 / - | 3 | ✓ Closing fragment |
| 10-11 04:22 | 40m | -12 / - | IR8PR | - / - | 4 | ✓ Closing fragment |
| 10-10 05:48 | 40m | -6 / - | YY5EHT | - / - | 2 | Partial capture |
| 10-10 05:37 | 40m | -8 / - | W2TT | - / -13 | 5 | ✓ Closing fragment |
| 10-10 04:45 | 40m | -3 / - | KJ4QVJ | - / - | 3 | Partial capture |
| 10-10 04:29 | 40m | +2 / 0 | IR8PR | -16 / -2 | 6 | ✓ Full exchange observed |
| 10-09 21:41 | 80m | -9 / -15 | IZ8XXE | +1 / -9 | 5 | ✓ Full exchange observed |
| 10-09 18:45 | 40m | -1 / - | IZ8XQC | - / - | 10 | Partial capture |
| 10-09 18:31 | 40m | -5 / -3 | IZ8XQC | -4 / - | 11 | Partial capture |
| 10-09 18:18 | 80m | -4 / -16 | IR8PR | -4 / -8 | 3 | ✓ Full exchange observed |
| 10-09 17:49 | 40m | -9 / - | IQ8DO | - / -1 | 4 | ✓ Closing fragment |
| 10-09 15:23 | 40m | -8 / - | IK8TWV | - / - | 8 | Partial capture |
| 10-09 15:20 | 40m | - / -8 | IW2MLJ | -16 / - | 2 | Partial capture |
| 10-09 15:18 | 40m | -10 / - | IK8TWV | - / - | 4 | Partial capture |
| 10-09 05:38 | 40m | -6 / - | N3YT | - / - | 6 | Partial capture |
| 10-09 05:04 | 80m | -11 / -12 | TM4GGR | -12 / -13 | 5 | ✓ Full exchange observed |
| 10-08 08:52 | 40m | -16 / - | IQ8DO | - / -13 | 5 | ✓ Closing fragment |
| 10-08 06:41 | 40m | -12 / - | IQ8DO | - / -12 | 5 | Partial capture |
| 10-08 04:53 | 40m | -2 / -11 | IR8PR | -15 / -13 | 4 | ✓ Full exchange observed |
| 10-08 04:33 | 40m | -19 / - | XE1RBV | - / - | 2 | Partial capture |
| 10-07 16:15 | 80m | -12 / - | TM4GGR | - / -17 | 6 | ✓ Closing fragment |
| 10-07 16:03 | 40m | -12 / - | TM4GGR | - / - | 11 | Partial capture |
| 10-07 15:57 | 40m | -7 / - | TM4GGR | - / - | 5 | Partial capture |
| 10-07 06:19 | 40m | - / - | S55A | -1 / - | 3 | Partial capture |
| 10-07 06:17 | 40m | -13 / - | IQ8DO | - / -19 | 3 | ✓ Closing fragment |
| 10-06 05:53 | 40m | -11 / - | IQ8DO | - / - | 2 | ✓ Closing fragment |
| 10-06 04:29 | 40m | -13 / - | IR8PR | - / -12 | 3 | Partial capture |
| 10-06 01:18 | 80m | -5 / - | Z61DX | - / - | 3 | Partial capture |
| 10-06 01:16 | 80m | -3 / -20 | R8LCA | -24 / - | 3 | ✓ Closing observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 054400 -13 1525 KS1WK F4JCU JN16 (x2) 051845 -5 1527 C5R F4JCU JN16 053100 -4 1527 XE1DEZ F4JCU JN16 (x4) 053545 -13 1527 C5R F4JCU JN16 (x3) 053830 -22 1773 F4JCU RZ4FWA LO23 054115 -7 1528 SV7BAY F4JCU JN16 (x2) 034030 -8 1919 F4JCU CT9/DF7EE -02 044400 +2 388 F4JCU TO4A RR73
UTC dB Audio Message 043015 -6 1498 WP3GW F4JCU JN16 (x4) 043215 -8 1498 CQ F4JCU JN16 a1 043330 -15 1498 F4JCU DJ7XY JO31 (x2) 043530 -13 1405 F4JCU YL2EA KO26 055115 -8 1496 DA125RH F4JCU JN16 (x5) 055515 -3 1347 F4JCU DA125RH -05 055530 -14 1496 DA125RH F4JCU R-04
UTC dB Audio Message 090400 -17 1532 <...> F4JCU JN16 (x11) 083730 +4 1252 F4JCU RR73; IK8TMF <...> -06 150200 -19 1531 <...> F4JCU JN16 (x2) 130900 -22 1593 F4JCU CR7BUW IM58
UTC dB Audio Message 055715 -16 1526 <EG46PPA> F4JCU JN16 055730 -18 2051 F4JCU EG46PPA +05 055745 -13 1526 EG46PPA F4JCU R-03 055930 -20 2051 F4JCU EG46PPA +00 062445 -14 1525 IQ3TR F4JCU JN16 (x4) 062630 -9 231 F4JCU IQ3TR -05 062645 -18 1525 IQ3TR F4JCU JN16 062700 -10 231 F4JCU IQ3TR -04 062715 -18 1525 IQ3TR F4JCU JN16 062730 -10 231 F4JCU IQ3TR +02 (x2) 062830 -19 1525 ZL3GAV F4JCU JN16
UTC dB Audio Message 194215 -20 1493 SO100PKP F4JCU JN16 (x8) 195400 +9 1963 F4JCU RR73; ON6MX <...> +02 200515 -24 1493 SO100PKP F4JCU JN16 200530 +0 2232 F4JCU SP100PKP -21 (x2) 194315 -18 1493 LZ936BA F4JCU JN16 194400 +12 1069 F4JCU RR73; SP2BZ <...> -06 042300 -24 1502 OH0Z F4JCU JN16
UTC dB Audio Message 142300 +8 1543 IN3LIA/P F4JCU R-13 (x4) 162530 -1 1544 <...> F4JCU JN16 (x4) 163115 -9 1544 F4JCU R6FX LN14 (x4) 193045 +8 1551 II7MGBT F4JCU JN16 (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.
CW
No CW receptions recorded for this callsign in the last 30 days.
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