JA4MMO — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving JA4MMO, decoded by SO8OO in southeastern Poland. 475 related FT8 messages, 5 CQ messages, observed on 60m, 40m, 20m, 10m, across 35 UTC dates. Heard between 2026-06-04 and 2026-08-22.
These are automated observations at the SO8OO receiver, not the station's official logbook. Times are UTC. Decoder S/N describes messages received at SO8OO; inferred entity and location data may be inaccurate for portable, remote or special-event operation.
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Overview
Frequent QSO partners observed at SO8OO
Stations JA4MMO worked most often, as logged from our receiver:
Activity Heatmap
Locator transmitted by JA4MMO
Approximate centre of PM54, decoded 2026-08-23 22:13 UTC. A transmitted locator is not proof of the operator's permanent location.
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 | JA4MMO S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-23 22:06 | 20m | -17 / - | F4HTA | - / - | 4 | Partial capture |
| 08-23 22:02 | 20m | -20 / - | SP2SPP | - / -21 | 4 | ✓ Closing fragment |
| 08-23 21:19 | 20m | -14 / - | IV3NEP | - / - | 3 | Partial capture |
| 08-23 21:17 | 20m | -13 / - | CS7ADA | - / - | 3 | Partial capture |
| 08-23 21:12 | 20m | -17 / - | M8CMG | - / -19 | 4 | ✓ Closing fragment |
| 08-22 22:34 | 20m | - / -10 | OZ2SPACE | -12 / - | 2 | Partial capture |
| 08-22 22:31 | 20m | - / -6 | EA3NE | -9 / - | 5 | Partial capture |
| 08-22 22:30 | 20m | - / - | OZ1LHK | -14 / - | 2 | ✓ Closing fragment |
| 08-22 22:22 | 20m | - / -5 | EA4FME | +2 / - | 8 | ✓ Closing fragment |
| 08-22 22:13 | 20m | - / -14 | PD1BJO | -10 / - | 5 | ✓ Closing fragment |
| 08-22 22:03 | 20m | -16 / - | G3MTL | - / - | 3 | Partial capture |
| 08-22 21:33 | 20m | - / - | F4BYA | +1 / - | 4 | Partial capture |
| 08-22 21:27 | 20m | - / - | YO7LPM | -1 / - | 2 | Partial capture |
| 08-22 21:21 | 20m | - / -15 | EA1NT | +1 / - | 3 | Partial capture |
| 08-22 21:19 | 20m | - / - | F4BYA | +4 / - | 4 | Partial capture |
| 08-22 21:15 | 20m | - / -13 | F6EKI | +17 / - | 7 | Partial capture |
| 08-19 21:10 | 20m | - / -9 | DL1SMA | -8 / - | 2 | ✓ Closing fragment |
| 08-10 22:02 | 20m | - / -13 | UR7IBU | -8 / - | 8 | ✓ Closing fragment |
| 08-07 21:50 | 20m | -20 / - | LZ2VO | - / -9 | 2 | Partial capture |
| 08-07 21:47 | 20m | - / -25 | PD0WRT | -17 / - | 3 | ✓ Closing fragment |
| 08-07 21:46 | 20m | - / -5 | OK2CNI | +14 / - | 3 | ✓ Closing fragment |
| 08-07 21:41 | 20m | - / - | G3ROY | -18 / - | 2 | Partial capture |
| 08-07 21:36 | 20m | -20 / - | EA4ILE | - / - | 2 | Partial capture |
| 08-07 21:26 | 20m | - / -12 | M8KUG | -11 / - | 3 | ✓ Closing fragment |
| 08-07 21:18 | 20m | -22 / -9 | E77FN | -8 / -3 | 6 | ✓ Full exchange observed |
| 08-06 22:22 | 20m | - / - | IU0OTP | -17 / - | 5 | Partial capture |
| 08-06 21:56 | 20m | - / -7 | <...> | -14 / - | 3 | Partial capture |
| 08-06 21:43 | 20m | - / -10 | DL1R | +5 / - | 3 | ✓ Closing fragment |
| 08-06 21:40 | 20m | - / -6 | F5PBG | -20 / - | 2 | Partial capture |
| 08-06 21:35 | 20m | - / -17 | IW3RQT | +15 / - | 5 | Partial capture |
| 08-06 21:34 | 20m | - / -9 | DL7KI | -14 / - | 4 | ✓ Closing fragment |
| 08-04 09:36 | 20m | - / -13 | PG1C | -12 / - | 5 | Partial capture |
| 08-04 09:34 | 20m | - / - | F6EQZ | -9 / - | 3 | ✓ Closing fragment |
| 07-24 22:15 | 40m | - / - | PD2BKB | -20 / - | 2 | Partial capture |
| 07-24 22:03 | 40m | - / - | PD2BKB | -22 / - | 3 | Partial capture |
| 07-24 21:45 | 20m | - / -17 | HB9OAU | -14 / - | 3 | ✓ Closing fragment |
| 07-24 21:25 | 20m | - / -16 | F4MUD | -20 / - | 6 | Partial capture |
| 07-24 21:04 | 20m | -20 / - | SP9OPL | - / -17 | 2 | ✓ Closing fragment |
| 07-24 21:02 | 20m | -20 / - | EA5BF | - / -14 | 4 | ✓ Closing fragment |
| 07-24 20:57 | 20m | -19 / -17 | M9KTM | -17 / -20 | 6 | ✓ Full exchange observed |
| 07-24 20:55 | 20m | -20 / -6 | DC7MA | -18 / - | 3 | ✓ Closing observed |
| 07-24 20:54 | 20m | -20 / - | YO6PNM | - / -14 | 2 | ✓ Closing fragment |
| 07-24 20:52 | 20m | -17 / -14 | F4NGR | -16 / -14 | 3 | Partial capture |
| 07-24 20:50 | 20m | -18 / - | UB3BGQ | - / -13 | 3 | ✓ Closing fragment |
| 07-24 20:48 | 20m | -17 / - | SM5URS | - / - | 3 | Partial capture |
| 07-24 20:46 | 20m | -19 / - | SP3WKW | - / -8 | 3 | ✓ Closing fragment |
| 07-24 14:13 | 20m | - / - | RK6AAC | -13 / - | 2 | ✓ Closing fragment |
| 07-24 13:56 | 20m | - / - | OZ1IIO | -16 / - | 2 | Partial capture |
| 07-24 13:39 | 20m | - / -11 | EW8GT | -15 / - | 7 | Partial capture |
| 07-23 21:36 | 20m | - / - | EA1AOC | +1 / - | 10 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 211730 -15 1803 CS7ADA JA4MMO PM54 (x3) 211900 -16 1802 IV3NEP JA4MMO PM54 (x3) 220215 -19 1894 SP2SPP JA4MMO PM54 (x4) 220630 -14 1354 F4HTA JA4MMO PM54 (x4) 221345 -18 1228 SQ2JG JA4MMO PM54
UTC dB Audio Message 212800 -17 1634 JA4MMO DK2CC JO63
UTC dB Audio Message 203730 -14 966 JA4MMO R2026RU -17 205415 -8 540 JA4MMO TA2BMV -23 (x2) 204045 -12 1679 JA4MMO RN6MA -11 (x3) 220330 -21 1440 JA4MMO PD2BKB RRR (x8)
UTC dB Audio Message 132745 -18 729 JA4MMO A65IV -14 122845 -14 1042 JA4MMO A60PC/5 -11 113700 +16 370 JA4MMO UR4LRG -11 (x2) 113930 -4 1512 JA4MMO UT7IF -13
Decoder S/N history by band
Daily averages across messages associated with this profile as decoded at SO8OO.