R4SF — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving R4SF, decoded by SO8OO in southeastern Poland. 272 related FT8 messages, 13 CQ messages, observed on 40m, 20m, across 16 UTC dates. Heard between 2026-04-21 and 2026-06-11.
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 R4SF worked most often, as logged from our receiver:
Activity Heatmap
Locator transmitted by R4SF
Approximate centre of LO36, decoded 2026-06-11 12:26 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 | R4SF S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 06-11 12:27 | 20m | -4 / - | R7GR | - / -1 | 2 | ✓ Closing fragment |
| 06-11 12:25 | 20m | -6 / - | RZ9A | - / -4 | 4 | Partial capture |
| 06-11 12:16 | 20m | -10 / -5 | UA9LLE | -5 / -13 | 9 | Partial capture |
| 06-11 12:14 | 20m | -1 / - | YB1KXV | - / -9 | 5 | ✓ Closing fragment |
| 06-11 12:10 | 20m | -5 / -12 | RA4ADF | -8 / -8 | 7 | ✓ Full exchange observed |
| 06-11 12:07 | 20m | 0 / - | <...> | - / -14 | 2 | Partial capture |
| 06-11 12:02 | 20m | - / -5 | UA3DLP | 0 / - | 6 | Partial capture |
| 06-11 12:00 | 20m | - / - | TA2ED | -14 / - | 2 | ✓ Closing fragment |
| 06-11 11:57 | 20m | +3 / - | R2BRD | - / -9 | 2 | Partial capture |
| 06-11 11:55 | 20m | -4 / -5 | F1PBZ | +7 / - | 5 | ✓ Closing observed |
| 06-11 11:54 | 20m | - / - | IU0VOX | +5 / - | 3 | Partial capture |
| 06-11 11:51 | 20m | - / -6 | F1POK | -10 / - | 2 | Partial capture |
| 06-11 11:48 | 20m | - / -7 | R6UBM | +4 / - | 3 | ✓ Closing fragment |
| 06-11 11:38 | 20m | -5 / - | UA9YTP | - / -12 | 2 | Partial capture |
| 06-11 11:35 | 20m | -2 / - | <...> | - / -16 | 2 | Partial capture |
| 06-11 11:34 | 20m | -9 / -13 | IQ6PE | -10 / -14 | 7 | ✓ Full exchange observed |
| 06-11 11:30 | 20m | - / -13 | RD6OB | -4 / - | 4 | ✓ Closing fragment |
| 06-11 11:21 | 20m | -4 / +7 | G4EBY/P | -6 / - | 2 | ✓ Closing observed |
| 06-11 11:13 | 20m | +2 / - | UA6HJT | - / +4 | 3 | Partial capture |
| 06-11 11:03 | 20m | - / +4 | SK0TM | 0 / - | 2 | Partial capture |
| 06-11 10:56 | 20m | -2 / - | <...> | - / -15 | 2 | Partial capture |
| 06-11 10:51 | 20m | - / +3 | <...> | +6 / - | 2 | Partial capture |
| 06-11 06:56 | 20m | - / -16 | R3EE | -6 / - | 2 | ✓ Closing fragment |
| 06-11 06:52 | 20m | -19 / - | DG7CF | - / -10 | 4 | Partial capture |
| 06-10 11:28 | 20m | +6 / +3 | CS8ABF | -10 / -10 | 4 | Partial capture |
| 06-10 11:20 | 20m | +3 / +4 | UA9CK | +6 / - | 3 | ✓ Closing observed |
| 06-10 11:16 | 20m | +1 / - | R6UBD | - / -7 | 7 | Partial capture |
| 06-10 11:11 | 20m | 0 / -15 | UE7DR | -8 / -11 | 4 | Partial capture |
| 06-10 11:09 | 20m | -6 / - | CS8ABF | - / - | 2 | Partial capture |
| 06-10 11:07 | 20m | -1 / - | EI9KF | - / -10 | 3 | ✓ Closing fragment |
| 06-10 11:06 | 20m | -8 / - | F4LHZ | - / -16 | 3 | ✓ Closing fragment |
| 06-10 11:02 | 20m | -10 / -10 | 9A1CCB | -4 / -11 | 4 | ✓ Full exchange observed |
| 06-10 10:58 | 20m | -3 / - | <...> | - / +10 | 5 | Partial capture |
| 06-10 10:53 | 20m | +1 / - | UE6DR | +2 / -6 | 10 | ✓ Full exchange observed |
| 06-10 10:52 | 20m | -6 / - | R2EN | - / - | 2 | Partial capture |
| 06-10 10:49 | 20m | +1 / -6 | UE6RU | -9 / -15 | 3 | Partial capture |
| 06-10 10:47 | 20m | -6 / - | R2EN | - / - | 2 | Partial capture |
| 06-10 10:41 | 20m | -8 / -5 | IW4BYK | +1 / -13 | 4 | ✓ Full exchange observed |
| 06-10 10:41 | 20m | -6 / - | RA0FF | - / -8 | 2 | Partial capture |
| 06-10 06:22 | 20m | -6 / - | R3BV | - / +5 | 2 | ✓ Closing fragment |
| 06-10 06:21 | 20m | -2 / - | F1TXI | -6 / -13 | 5 | Partial capture |
| 06-10 06:17 | 20m | -10 / - | R9HEP | - / -13 | 4 | Partial capture |
| 06-10 06:13 | 20m | -11 / - | W5AJ | - / -13 | 4 | Partial capture |
| 06-10 06:09 | 20m | -13 / -9 | UE7RU | +12 / -12 | 5 | ✓ Full exchange observed |
| 06-10 06:02 | 20m | -1 / - | TI5RR | - / -14 | 4 | Partial capture |
| 06-10 05:59 | 20m | -4 / - | YM1KE | - / -17 | 2 | Partial capture |
| 06-03 12:58 | 20m | -13 / - | IK4RSR | -11 / -12 | 2 | ✓ Closing observed |
| 06-03 12:47 | 20m | -14 / -5 | R7OI | +1 / -10 | 8 | ✓ Full exchange observed |
| 06-03 10:58 | 20m | - / - | RW9CC | -18 / - | 2 | Partial capture |
| 06-02 12:38 | 20m | -9 / - | IK4TVP | - / -13 | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 121745 -7 2458 R4SF UA9LLE MO27 121830 -4 1757 YB1KXV R4SF R-09 (x2) 121930 -7 1757 UA9LLE R4SF -13 122045 +0 2457 R4SF UA9LLE R-05 (x2) 122130 -13 1757 UA9LLE R4SF -13 122145 -3 2457 R4SF UA9LLE R-05 (x2) 122545 -8 1757 RZ9A R4SF LO36 (x4) 122745 -6 1756 R7GR R4SF -01 (x2)
UTC dB Audio Message 045230 -14 738 R4SF RM5F KO85 045545 -1 756 R4SF RL2Y -07 (x3)
Decoder S/N history by band
Daily averages across messages associated with this profile as decoded at SO8OO.