JF4HDR — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving JF4HDR, decoded by SO8OO in southeastern Poland. 740 related FT8 messages, 3 CQ messages, observed on 160m, 40m, 20m, 10m, across 36 UTC dates. Heard between 2026-05-25 and 2026-08-21.
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 JF4HDR worked most often, as logged from our receiver:
Activity Heatmap
Locator transmitted by JF4HDR
Approximate centre of PM64, decoded 2026-08-21 20:36 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 | JF4HDR S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-21 21:12 | 20m | - / - | EA7EZ | -6 / - | 2 | ✓ Closing fragment |
| 08-21 20:41 | 40m | - / -10 | DM5KK | 0 / - | 2 | Partial capture |
| 08-21 20:37 | 40m | - / - | DM5KK | +10 / - | 2 | Partial capture |
| 08-21 20:36 | 40m | -16 / - | GW8DX | +7 / -12 | 3 | ✓ Closing observed |
| 08-21 20:27 | 40m | -12 / -22 | EA3ENB | -4 / - | 4 | ✓ Closing observed |
| 08-21 20:25 | 40m | -12 / -10 | DL8OH | +25 / - | 4 | ✓ Closing observed |
| 08-21 20:23 | 40m | - / -7 | UT1UY | +17 / - | 3 | ✓ Closing fragment |
| 08-21 20:21 | 40m | -16 / -9 | IU5AWQ | 0 / -14 | 6 | ✓ Full exchange observed |
| 08-21 20:16 | 40m | -19 / - | SA3LEN | - / - | 2 | ✓ Closing fragment |
| 08-21 20:14 | 40m | -18 / -4 | DK7ZT | -2 / -15 | 4 | ✓ Full exchange observed |
| 08-21 20:12 | 40m | -22 / -3 | DL3OCF | +9 / +1 | 6 | ✓ Full exchange observed |
| 08-21 20:12 | 40m | -18 / -7 | DL3TC | +3 / -5 | 5 | ✓ Full exchange observed |
| 08-21 20:12 | 40m | - / - | G0GFC | -5 / - | 2 | Partial capture |
| 08-21 20:10 | 40m | -17 / -6 | DC1SN | -6 / -13 | 6 | ✓ Full exchange observed |
| 08-21 20:09 | 40m | -17 / -7 | DL6RU | -4 / - | 4 | ✓ Closing observed |
| 08-21 20:08 | 40m | - / -9 | PD0MNO | -13 / - | 3 | ✓ Closing fragment |
| 08-21 20:03 | 40m | - / -8 | LZ2FP | -5 / - | 4 | ✓ Closing fragment |
| 08-21 20:03 | 40m | - / - | PD4JOH | -10 / - | 5 | Partial capture |
| 08-21 20:02 | 40m | - / - | PD1SL | -6 / - | 2 | Partial capture |
| 08-21 19:59 | 40m | - / - | I1YTO | -15 / - | 3 | ✓ Closing fragment |
| 08-21 19:55 | 40m | - / -19 | EI4KF | +7 / - | 4 | Partial capture |
| 08-21 19:55 | 40m | - / -16 | AO25FDM | -4 / - | 2 | ✓ Closing fragment |
| 08-21 08:33 | 10m | - / -5 | TA6B | -12 / - | 2 | ✓ Closing fragment |
| 08-20 21:44 | 40m | - / -13 | RW3ZC | -10 / - | 2 | Partial capture |
| 08-20 21:30 | 40m | - / -14 | ON4IQ | +18 / - | 4 | ✓ Closing fragment |
| 08-17 20:36 | 20m | - / +6 | 5B/IK7YTT | -9 / - | 2 | Partial capture |
| 08-17 20:28 | 40m | - / - | DL3TC | 0 / - | 2 | Partial capture |
| 08-17 20:23 | 40m | - / -6 | 9A3K | 0 / - | 3 | ✓ Closing fragment |
| 08-15 03:48 | 20m | - / -5 | UN7LEW | -5 / - | 5 | Partial capture |
| 08-11 20:34 | 40m | - / - | UR5WA | -14 / - | 4 | Partial capture |
| 08-11 20:33 | 40m | - / -16 | HB9FGO | -14 / - | 2 | Partial capture |
| 08-11 20:24 | 40m | - / -11 | DF6DBF | -19 / - | 3 | ✓ Closing fragment |
| 08-11 20:20 | 40m | - / -16 | LB7ZG | -6 / - | 3 | ✓ Closing fragment |
| 08-11 20:19 | 40m | - / 0 | SQ9SET | -11 / - | 3 | ✓ Closing fragment |
| 08-10 20:41 | 40m | - / -15 | ER3CT | -14 / - | 2 | Partial capture |
| 08-05 20:19 | 40m | - / - | R7RCG | -17 / - | 2 | Partial capture |
| 08-05 20:06 | 40m | - / -4 | HB9CXZ | -4 / - | 2 | ✓ Closing fragment |
| 08-05 19:58 | 40m | - / -6 | TA6MMI | -14 / - | 3 | Partial capture |
| 08-05 19:55 | 40m | - / -19 | PD1EN | -19 / - | 4 | ✓ Closing fragment |
| 08-05 19:49 | 40m | - / - | US2YW | -14 / - | 2 | Partial capture |
| 08-05 19:39 | 40m | - / 0 | UR1CCT | +10 / - | 3 | ✓ Closing fragment |
| 08-05 19:36 | 40m | - / -13 | DL2RPN | -6 / - | 2 | ✓ Closing fragment |
| 08-05 19:33 | 40m | - / -8 | RV6AVU | -10 / - | 4 | ✓ Closing fragment |
| 08-05 19:30 | 40m | - / -16 | EI8GS | -15 / - | 2 | Partial capture |
| 08-04 07:33 | 20m | - / - | CT3MD | -6 / - | 2 | Partial capture |
| 08-02 20:55 | 40m | - / -8 | SQ8LE | -20 / - | 2 | ✓ Closing fragment |
| 07-31 20:44 | 20m | - / -14 | CR7BUJ | -9 / - | 2 | ✓ Closing fragment |
| 07-31 20:33 | 40m | - / - | SP6LUT | -2 / - | 6 | Partial capture |
| 07-31 20:31 | 40m | - / - | RW3DDZ | -16 / - | 2 | Partial capture |
| 07-31 20:30 | 40m | - / - | I5MPN | -7 / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 205415 -20 925 9A2L JF4HDR 73 204415 -9 1256 JF4HDR CR7BUJ -14 (x2) 073300 -8 2406 JF4HDR CT3MD IM13 (x2) 212800 -5 2472 JF4HDR PE2AE JO33 034800 -11 500 JF4HDR UN7LEW -05 (x5) 203600 -9 565 JF4HDR 5B/IK7YTT +06 (x2) 211215 -6 1266 JF4HDR EA7EZ IM76 (x2)
UTC dB Audio Message 202500 +23 2768 JF4HDR DL8OH JO33 (x3) 202615 -12 776 DL8OH JF4HDR RR73 202700 -4 777 JF4HDR EA3ENB JN11 (x3) 202815 -12 776 EA3ENB JF4HDR RR73 203645 -20 2701 GW8DX JF4HDR PM64 (x2) 203730 +7 2875 JF4HDR GW8DX RR73 203730 +11 2998 JF4HDR DM5KK JO60 (x4)
UTC dB Audio Message 103900 +9 2088 JF4HDR SK0TM -08 083330 -11 1786 JF4HDR TA6B -05 (x2)
UTC dB Audio Message 213800 -16 1388 JF4HDR S50PV JN76
Decoder S/N history by band
Daily averages across messages associated with this profile as decoded at SO8OO.