RK4UZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Locator transmitted in a decoded message: LO24

Receiver-side FT8 activity involving RK4UZ, decoded by SO8OO in southeastern Poland. 410 related FT8 messages, 62 CQ messages, observed on 80m, 40m, 20m, 10m, across 59 UTC dates. Heard between 2026-05-28 and 2026-08-23.

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

410
Related messages
62
CQ messages
59
UTC dates heard
-10 dB
Mean decoder S/N

Bands

80m 20m 40m 10m
First seen: 2026-05-28
Last seen: 2026-08-23 13:41 UTC

Frequent QSO partners observed at SO8OO

Stations RK4UZ worked most often, as logged from our receiver:

Activity Heatmap

Locator transmitted by RK4UZ

Approximate centre of LO24, decoded 2026-08-23 15:40 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 UTCBandRK4UZ S/NCounterpartCounterpart S/NMsgsCapture
08-23 15:40 40m -8 / -13 DJ3HW -7 / -19 6 ✓ Full exchange observed
08-23 15:38 40m -19 / - EU4BE - / -16 3 ✓ Closing fragment
08-23 15:18 40m - / - 9A3EYA -4 / - 3 Partial capture
08-23 15:01 40m -21 / - UN2NC - / -2 2 ✓ Closing fragment
08-23 14:57 40m -22 / - R3NAW - / - 2 ✓ Closing fragment
08-23 14:55 40m -22 / - <...> - / - 2 Partial capture
08-23 14:51 40m - / +8 UG4L -12 / - 2 ✓ Closing fragment
08-21 15:07 40m -16 / - R9FGJ - / -11 3 Partial capture
08-21 15:02 40m - / +9 RU3NCW -6 / - 2 ✓ Closing fragment
08-20 17:20 80m -7 / -8 R6DUW -10 / -12 6 ✓ Full exchange observed
08-20 17:07 40m -14 / - RW4HRE - / -12 2 Partial capture
08-20 17:00 40m -8 / +3 UB2FEK -2 / -11 4 ✓ Full exchange observed
08-20 16:57 40m -11 / -9 IW7DHC -2 / -11 8 ✓ Full exchange observed
08-20 16:55 40m -11 / +5 EU6UE -10 / -1 4 ✓ Full exchange observed
08-20 13:17 40m - / -22 SQ7BCB -2 / - 2 ✓ Closing fragment
08-20 06:32 20m 0 / - R3PLN/P - / -9 2 Partial capture
08-19 17:24 80m -12 / -5 UB3LBU -8 / -13 2 Partial capture
08-19 17:18 80m -15 / -12 RA6ATZ +3 / -8 6 ✓ Full exchange observed
08-19 17:14 80m -18 / -1 RW4CB -4 / -2 8 ✓ Full exchange observed
08-18 15:15 40m - / +2 RD7O -19 / - 3 ✓ Closing fragment
08-18 15:03 20m -12 / - R8LDJ - / -3 2 Partial capture
08-18 14:59 20m - / -18 TA2ED -20 / - 2 Partial capture
08-18 08:53 10m - / -6 EA7BEM -8 / - 4 ✓ Closing fragment
08-18 08:47 10m - / -8 IK4IDF -14 / - 3 ✓ Closing fragment
08-18 08:33 10m - / +1 R6TA -4 / - 4 Partial capture
08-17 17:46 80m -18 / +6 R6ML -4 / - 5 ✓ Closing observed
08-17 17:44 80m -14 / - RK6DZ - / - 2 ✓ Closing fragment
08-17 17:35 80m - / -6 YO4NT +1 / - 2 ✓ Closing fragment
08-17 17:28 80m -14 / - RA4FHO - / - 2 Partial capture
08-17 17:23 80m -16 / -3 RX6DA +2 / - 4 ✓ Closing observed
08-17 17:20 80m -18 / - RA3TK - / - 2 Partial capture
08-17 17:17 80m - / -3 R2PT -12 / - 4 ✓ Closing fragment
08-16 13:10 20m -18 / - CX6TU - / -20 4 ✓ Closing fragment
08-15 12:47 20m -12 / - JJ0WAJ - / -18 3 Partial capture
08-15 12:40 20m -10 / - R4UR - / - 2 Partial capture
08-15 12:34 20m -16 / - UA0LQE - / -11 2 Partial capture
08-15 12:29 20m -18 / - RI0FA - / -17 2 Partial capture
08-15 12:25 20m -17 / - JR7AQL - / -19 3 ✓ Closing fragment
08-11 13:13 20m -13 / - BA5AW - / - 2 Partial capture
08-08 15:17 20m -14 / - <...> - / - 2 Partial capture
08-08 03:23 80m - / -12 EW8AAC -8 / - 2 ✓ Closing fragment
08-07 17:08 80m -16 / -14 RK6OV -14 / - 3 ✓ Closing observed
08-07 17:02 80m -20 / -2 RA3X -11 / - 5 ✓ Closing observed
08-07 16:37 40m - / -3 R2AVW -10 / - 2 ✓ Closing fragment
08-07 09:22 20m -22 / - R2DAW -24 / -19 2 ✓ Closing observed
08-06 13:42 20m -12 / - JJ1JMZ - / -13 2 ✓ Closing fragment
08-05 06:52 20m -18 / - R5FY - / +3 2 ✓ Closing fragment
08-02 17:12 40m -18 / - UB6LUR - / - 2 Partial capture
07-30 15:57 20m -12 / - HS9RAV - / - 3 Partial capture
07-30 15:53 20m -13 / - BG6WFY - / - 3 Partial capture

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

40m 
UTC    dB Audio  Message
151615 -20 1895  CQ RK4UZ LO24 (x2)
151800  -3 1890  RK4UZ 9A3EYA JN86 (x3)
153545 -12  877  DJ3HW RK4UZ LO24
153800 -19 1880  EU4BE RK4UZ LO24 (x3)
154000  -7  878  RK4UZ DJ3HW -13
154015 -12  877  DJ3HW RK4UZ LO24
154030 -10  878  RK4UZ DJ3HW -13
154045  -6  877  DJ3HW RK4UZ R-19
154100  -4  878  RK4UZ DJ3HW RR73
154115  -7  877  DJ3HW RK4UZ 73
80m 
UTC    dB Audio  Message
172430 -12 1849  UB3LBU RK4UZ -13
172445  -8 1496  RK4UZ UB3LBU R-05
171415 -10 1746  CQ RK4UZ LO24 (x7)
172045 -12 1750  RK4UZ R6DUW KN96 (x2)
172130  -7 1745  R6DUW RK4UZ -12
172145  -9 1750  RK4UZ R6DUW R-08
172200  -7 1746  R6DUW RK4UZ RR73
172215 -10 1750  RK4UZ R6DUW 73
20m 
UTC    dB Audio  Message
131130 -13 2030  CX6TU RK4UZ R-23 (x2)
115345 -19 1990  YT2DZB RK4UZ LO24
145830  -9 2014  CQ RK4UZ LO24 (x2)
145945 -22 2013  RK4UZ TA2ED -18
150000 -15 2014  CQ RK4UZ LO24
150015 -19 2013  RK4UZ TA2ED -18
150015 -11 1050  RK4UZ GE3ZQQ IO82
150100 -15 2014  R8CHY RK4UZ RR73
150300 -10 2014  R8LDJ RK4UZ R-03 (x2)
063245  +2 1895  R3PLN/P RK4UZ LO24
063400  -4 2630  RK4UZ R6DOB/M -06
063445  -3 1895  R3PLN/P RK4UZ R-09
10m 
UTC    dB Audio  Message
144445 -11 2687  RK4UZ SM2LIY RR73
083100 -15 2375  RK4UZ R6DWD -12
083330  -6 2803  RK4UZ R6TA LN13 (x4)
083800 -19 2079  RK4UZ R6ZIG RR73
084315  +3 2787  RK4UZ R6OD RR73
084700 -12 1721  RK4UZ IK4IDF JN54 (x3)
085300  -6 1392  RK4UZ EA7BEM IM66 (x4)

Decoder S/N history by band

Daily averages across messages associated with this profile as decoded at SO8OO.