F1JUM — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving F1JUM, decoded by SO8OO in southeastern Poland. 45 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 15 UTC dates in the available aggregate history. Observed between 2026-07-08 and 2026-09-21.
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 45 FT8 messages attributed to F1JUM as the transmitting token by decoded message structure across 15 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (64%), followed by 20 m (20%) and 10 m (16%). Several six-hour UTC windows tied for the largest share (69%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (67%); the estimated median was -18 dB.
Overview
Bands
Last attributed message: 2026-09-21 06:14 UTC
Observed FT8 message patterns
- Attributed sample
- 45 messages
- Active dates
- 15 UTC dates
- Estimated median S/N
- -18 dB
- Estimated 10th-90th percentile
- -23 to -12 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 30, moderate (-15 to -9 dB) 15, strong (≥ -8 dB) 0.
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 F1JUM 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 F1JUM
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
- JN07 · 23 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,544 km (approx.)
- Last such locator decoded
- 2026-09-21 06:14 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 | F1JUM S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-17 06:23 | 40m | - / - | S51PV | -12 / - | 3 | Partial capture |
| 09-16 12:45 | 40m | - / -12 | DL6EL | -1 / - | 5 | Partial capture |
| 09-16 06:34 | 40m | - / -24 | IU8RFW | -16 / - | 2 | Partial capture |
| 09-14 14:42 | 40m | - / -1 | PD1DP | -17 / - | 3 | ✓ Closing fragment |
| 09-14 14:33 | 40m | - / -7 | F4HMP | -16 / - | 2 | ✓ Closing fragment |
| 09-14 06:11 | 40m | - / -1 | DK3XX | -14 / - | 2 | ✓ Closing fragment |
| 09-12 06:21 | 40m | - / - | HB9EOT | -1 / - | 3 | ✓ Closing fragment |
| 09-11 05:55 | 40m | - / +6 | DL9SEV | -4 / - | 2 | ✓ Closing fragment |
| 09-11 05:45 | 40m | - / +7 | IK2SAR | -16 / - | 2 | ✓ Closing fragment |
| 09-06 16:56 | 40m | - / -11 | SO100PKP | -4 / - | 2 | Partial capture |
| 09-06 16:41 | 40m | -18 / -13 | 4X1UF | -10 / -11 | 3 | ✓ Full exchange observed |
| 09-06 16:40 | 40m | - / - | F1RAU | -1 / - | 3 | Partial capture |
| 09-06 16:27 | 40m | - / - | IK2BUF | -15 / - | 3 | ✓ Closing fragment |
| 09-04 06:02 | 40m | - / +5 | ON8FAB | -16 / - | 2 | Partial capture |
| 09-03 06:23 | 40m | - / -4 | DD7EE | 0 / - | 2 | ✓ Closing fragment |
| 09-01 05:45 | 40m | -22 / - | EI9KF | - / -3 | 2 | Partial capture |
| 09-01 05:40 | 40m | -14 / - | TC30AGU | - / - | 3 | Partial capture |
| 09-01 05:33 | 40m | - / -2 | LZ936BA | -2 / - | 2 | Partial capture |
| 08-31 14:34 | 40m | - / -11 | PD4RJ | -20 / - | 2 | Partial capture |
| 08-30 15:36 | 40m | - / -4 | DL7ACA | -6 / - | 2 | ✓ Closing fragment |
| 08-30 06:14 | 40m | - / -6 | DK2M | +6 / - | 2 | ✓ Closing fragment |
| 08-29 14:39 | 40m | - / -14 | G4DBW | -16 / - | 3 | ✓ Closing fragment |
| 08-29 14:39 | 40m | - / - | M0CQL | -18 / - | 4 | ✓ Closing fragment |
| 08-29 13:51 | 20m | - / -10 | EC5M | -2 / - | 2 | ✓ Closing fragment |
| 08-29 13:40 | 20m | - / - | EB3JT | +4 / - | 4 | ✓ Closing fragment |
| 08-26 05:42 | 40m | - / +7 | EI8HT | -8 / - | 2 | Partial capture |
| 08-24 06:29 | 40m | - / -19 | SP9UPH | +1 / - | 5 | ✓ Closing fragment |
| 08-24 06:29 | 40m | - / -15 | SP9JBP | +6 / - | 5 | Partial capture |
| 08-24 05:57 | 40m | - / -11 | SP4MPH | -3 / - | 4 | ✓ Closing fragment |
| 08-24 05:47 | 40m | - / -2 | DL9KM | 0 / - | 4 | ✓ Closing fragment |
| 08-24 05:42 | 40m | -14 / - | M0KDZ | - / -1 | 2 | Partial capture |
| 08-21 13:47 | 10m | - / - | DF6QN | +6 / - | 2 | Partial capture |
| 08-21 13:40 | 10m | - / +9 | DN9TB | -14 / - | 3 | Partial capture |
| 08-21 13:33 | 10m | -22 / - | 5A1AL | - / - | 2 | Partial capture |
| 08-21 06:05 | 40m | - / -25 | DG0JJH | -12 / - | 2 | Partial capture |
| 08-21 06:02 | 40m | - / -14 | DB3MAX | -4 / - | 5 | Partial capture |
| 08-21 05:50 | 40m | -19 / +5 | II7MGBT | -9 / - | 2 | Partial capture |
| 08-20 05:58 | 40m | - / - | DA1TE | -13 / - | 3 | ✓ Closing fragment |
| 08-20 05:51 | 40m | - / -5 | GW4HZA | -9 / - | 2 | ✓ Closing fragment |
| 08-20 05:44 | 40m | - / +9 | DD7DAC | +2 / - | 2 | ✓ Closing fragment |
| 08-01 06:15 | 40m | - / - | SP6AXW | -16 / - | 2 | Partial capture |
| 07-28 06:27 | 40m | - / -6 | OE5ROR | -4 / - | 2 | ✓ Closing fragment |
| 07-25 05:54 | 40m | - / - | SQ8V | -15 / - | 3 | Partial capture |
| 07-23 14:08 | 10m | - / -18 | SV2AEL | -9 / - | 2 | ✓ Closing fragment |
| 07-23 06:02 | 40m | - / - | SM7JKW | -15 / - | 2 | Partial capture |
| 07-22 06:12 | 40m | - / -12 | DL8TV | -12 / - | 2 | Partial capture |
| 07-21 05:36 | 40m | - / - | DL6UM | -7 / - | 4 | Partial capture |
| 07-17 06:55 | 20m | -22 / - | OH1NHX | - / - | 2 | ✓ Closing fragment |
| 07-15 06:05 | 40m | - / -11 | ED7SUN | -12 / - | 2 | ✓ Closing fragment |
| 07-14 06:58 | 20m | - / - | IK4LZH | -4 / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 060315 -10 2684 F1JUM OH5VT 73 060415 -3 474 F1JUM II7IAME -07 063400 -16 1367 F1JUM IU8RFW R-24 (x2) 124545 -2 594 F1JUM DL6EL JN57 (x5) 055515 -23 1419 OZ/DF4ZL F1JUM R+07 062345 -9 2345 F1JUM S51PV JN76 (x3) 055945 -23 2117 WA2HIP F1JUM JN07 061445 -16 1033 PD1HTW F1JUM JN07
UTC dB Audio Message 065630 -20 1773 OH1NHX F1JUM 73 065700 -12 733 9A60CBM F1JUM JN07 071915 -20 1242 OZ7BFC F1JUM 73 064745 -18 869 AH6U F1JUM JN07 132900 -24 1550 F1JUM PA7TT JO33 070545 -12 325 TK5K F1JUM 73 071200 +5 2588 F1JUM IQ4JO JN63 075145 -8 2103 F1JUM II7MGBT -09 134000 +8 1849 F1JUM EB3JT JN01 (x4) 134530 -18 1848 F1JUM UA4FEN RR73 135115 +0 1732 F1JUM EC5M -10 (x2)
UTC dB Audio Message 140830 -6 2137 F1JUM SV2AEL -18 (x2) 061200 -14 915 F1JUM IT9ORA RR73 145445 -7 2685 F1JUM F1PBZ -17 133115 -9 397 F1JUM IV3DXW -10 135415 -23 1928 IQ4JO F1JUM RR73 133315 -21 2171 5A1AL F1JUM JN07 (x2) 133730 -23 1441 SN100LKK F1JUM JN07 134015 -15 1440 F1JUM DN9TB R+09 (x3) 134715 +5 2754 F1JUM DF6QN JO41 (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.
FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee