R4SF — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Locator transmitted in a decoded message: LO36

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

272
Related messages
13
CQ messages
16
UTC dates heard
-3 dB
Mean decoder S/N

Bands

First seen: 2026-04-21
Last seen: 2026-06-11 10:22 UTC

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 UTCBandR4SF S/NCounterpartCounterpart S/NMsgsCapture
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.

20m
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)
40m
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.