F4MUM — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving F4MUM, decoded by SO8OO in southeastern Poland. 64 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-08-30 and 2026-09-09.
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 64 FT8 messages attributed to F4MUM as the transmitting token by decoded message structure across 4 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 (98%); the estimated median was +2 dB.
Overview
Bands
Last attributed message: 2026-09-09 18:32 UTC
Observed FT8 message patterns
- Attributed sample
- 64 messages
- Active dates
- 4 UTC dates
- Estimated median S/N
- +2 dB
- Estimated 10th-90th percentile
- -2 to +4 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 1, strong (≥ -8 dB) 63.
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 F4MUM in decoded directed-looking exchanges:
Most frequent locator attributed to F4MUM
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
- JO10 · 26 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,335 km (approx.)
- Last such locator decoded
- 2026-09-09 18:32 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 | F4MUM S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-09 18:32 | 40m | +8 / - | IZ0ZIP | -8 / -14 | 2 | ✓ Closing observed |
| 09-09 18:32 | 40m | - / -3 | F1PBZ | -4 / - | 4 | Partial capture |
| 09-02 19:47 | 40m | -1 / - | G1BJC | -11 / -9 | 3 | Partial capture |
| 09-02 19:47 | 40m | +1 / - | M6GPH | - / -9 | 2 | Partial capture |
| 09-02 19:45 | 40m | - / - | IZ1HJU | -18 / - | 2 | Partial capture |
| 09-02 19:43 | 40m | +1 / - | M9PMB | - / -9 | 4 | Partial capture |
| 08-31 19:56 | 40m | - / -3 | RX9ABI | -4 / - | 4 | Partial capture |
| 08-31 19:55 | 40m | +2 / - | F5PKF | - / -2 | 2 | Partial capture |
| 08-31 19:53 | 40m | +2 / -5 | HG8LXL | -4 / - | 7 | ✓ Closing observed |
| 08-31 19:49 | 40m | +2 / - | PD0LBY | - / -1 | 7 | Partial capture |
| 08-31 19:49 | 40m | - / - | F5PBG | +4 / - | 4 | Partial capture |
| 08-31 19:49 | 40m | - / - | S51PV | -5 / - | 4 | Partial capture |
| 08-31 19:44 | 40m | +4 / +3 | OE8PIT | -13 / -3 | 6 | Partial capture |
| 08-31 19:43 | 40m | +2 / +8 | SP9W | -4 / -3 | 5 | ✓ Full exchange observed |
| 08-31 19:41 | 40m | - / - | DL3TC | 0 / - | 2 | Partial capture |
| 08-31 19:40 | 40m | +2 / -3 | DL3MIB | +9 / +7 | 5 | ✓ Full exchange observed |
| 08-31 19:40 | 40m | - / - | F5PBG | -1 / - | 4 | Partial capture |
| 08-31 19:38 | 40m | +4 / - | PA3AGN | - / 0 | 2 | Partial capture |
| 08-31 19:35 | 40m | +2 / - | F6FEG | - / -21 | 6 | Partial capture |
| 08-31 19:30 | 40m | - / - | F5PBG | +5 / - | 3 | Partial capture |
| 08-31 19:30 | 40m | - / - | RL3K | -10 / - | 2 | Partial capture |
| 08-31 19:29 | 40m | - / - | OE3RAP | -2 / - | 6 | Partial capture |
| 08-31 19:27 | 40m | - / -9 | OK1WCF | -8 / - | 2 | ✓ Closing fragment |
| 08-31 19:25 | 40m | -7 / - | F1IQH | -10 / - | 2 | ✓ Closing observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 194715 -21 2365 F4MUM IZ1HJU JN44 194730 +2 1251 M6GPH F4MUM -09 194745 -11 539 F4MUM G1BJC IO92 194800 +0 1251 M6GPH F4MUM RRR 194830 -2 1251 G1BJC F4MUM -09 (x2) 194930 -2 1251 CQ F4MUM JO10 195000 +0 1251 F4NPE F4MUM -02 183200 +4 1250 CQ F4MUM JO10 183215 -4 2489 F4MUM F1PBZ -03 183230 +8 1250 IZ0ZIP F4MUM R-14 183245 -8 1250 F4MUM IZ0ZIP RR73 183245 -4 2489 F4MUM F1PBZ -03 (x3)
UTC dB Audio Message 203900 +5 1289 CQ F4MUM JO10
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.
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