RK4H — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Locator transmitted in a decoded message: LO53

Receiver-side FT8 activity involving RK4H, decoded by SO8OO in southeastern Poland. 352 related FT8 messages, 82 CQ messages, observed on 20m, 10m, across 36 UTC dates. Heard between 2026-05-26 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

352
Related messages
82
CQ messages
36
UTC dates heard
-6 dB
Mean decoder S/N

Bands

20m 10m
First seen: 2026-05-26
Last seen: 2026-08-22 00:05 UTC

Frequent QSO partners observed at SO8OO

Stations RK4H worked most often, as logged from our receiver:

Activity Heatmap

Locator transmitted by RK4H

Approximate centre of LO53, decoded 2026-08-23 03:42 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 UTCBandRK4H S/NCounterpartCounterpart S/NMsgsCapture
08-23 03:38 20m +3 / - SQ7BKG - / -6 3 ✓ Closing fragment
08-23 03:36 20m +3 / - ZL1OGX - / -19 3 Partial capture
08-23 03:34 20m +1 / - KF4BI - / - 2 Partial capture
08-23 03:32 20m +7 / - W8JDP - / - 3 Partial capture
08-23 03:29 20m +5 / - N3LAG - / - 2 Partial capture
08-23 03:28 20m +6 / - KZ7Y - / - 5 Partial capture
08-22 04:44 20m +4 / - VK3JMA - / - 2 Partial capture
08-22 02:05 20m - / -7 D2IM -14 / - 2 ✓ Closing fragment
08-21 00:55 20m - / 0 9K2GR +8 / - 2 Partial capture
08-21 00:38 20m - / -16 HZ1ML -6 / - 2 ✓ Closing fragment
08-21 00:32 20m - / -15 7Z1BQ -8 / - 2 ✓ Closing fragment
08-21 00:12 20m - / -9 TA3NK -15 / - 2 Partial capture
08-17 01:07 20m - / -15 WA1HXH -8 / - 2 ✓ Closing fragment
08-16 23:46 20m - / -9 PW8BR -11 / - 3 Partial capture
08-16 23:43 20m - / -8 HI8J -8 / - 2 ✓ Closing fragment
08-11 04:22 20m -14 / - KB2KBC - / -15 2 Partial capture
08-11 04:18 20m -12 / - RI1ANC - / - 3 Partial capture
08-11 04:16 20m -11 / - K6LS - / - 2 Partial capture
08-11 04:16 20m -12 / - K6TIG - / - 2 Partial capture
08-11 04:13 20m -8 / - RI1ANC - / - 2 Partial capture
08-11 04:12 20m -10 / - K4AKA - / -8 3 ✓ Closing fragment
08-11 04:06 20m -15 / - OA4DOR - / - 3 Partial capture
08-10 03:46 20m - / -5 RK6AAC -15 / - 3 ✓ Closing fragment
08-10 02:19 20m -18 / - PT7BI - / - 2 Partial capture
08-09 19:08 20m -15 / -2 OK2CNI +4 / -17 5 ✓ Full exchange observed
08-09 18:40 20m -17 / - LA2PIA - / -10 2 ✓ Closing fragment
08-09 18:23 20m -18 / - R7OV - / -12 2 ✓ Closing fragment
08-05 15:56 20m - / -9 RA9J -11 / - 4 ✓ Closing fragment
07-26 05:01 20m -14 / - SP9DAT - / -13 2 ✓ Closing fragment
07-26 04:47 20m -12 / - K9STL - / - 3 Partial capture
07-26 04:46 20m -9 / - AF7Z - / - 2 Partial capture
07-26 04:26 20m -15 / - WS7O - / - 2 Partial capture
07-26 04:19 20m -9 / -12 K0DG -20 / -11 9 ✓ Full exchange observed
07-26 04:16 20m 0 / - KB9UMT - / -24 6 ✓ Closing fragment
07-26 04:11 20m -2 / - K0DG - / - 4 Partial capture
07-26 04:02 20m -7 / - WS7O - / - 3 Partial capture
07-26 03:57 20m -9 / - KB9UMT - / - 2 Partial capture
07-26 03:53 20m -7 / - W3EAT - / - 4 ✓ Closing fragment
07-26 03:48 20m -10 / - W1DRF - / - 2 Partial capture
07-26 03:44 20m -6 / - KI2L - / -12 2 Partial capture
07-26 03:41 20m +1 / - KC6QHP - / - 2 Partial capture
07-25 04:03 20m -13 / - AE4SS - / -14 3 Partial capture
07-25 04:01 20m -14 / - VE2OPC - / - 3 Partial capture
07-25 03:50 20m -11 / - HC1FQ - / - 2 Partial capture
07-22 09:18 20m - / +1 RK3AQ -16 / - 2 Partial capture
07-22 09:05 20m - / -1 R3LC -2 / - 2 ✓ Closing fragment
07-22 08:57 20m -16 / - YV5ULO - / - 4 Partial capture
07-22 04:10 20m - / - IK4LZH -4 / - 3 Partial capture
07-20 04:10 20m -11 / -11 N1LYP -13 / -10 13 ✓ Full exchange observed
07-20 04:09 20m -6 / - K5UR - / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

20m 
UTC    dB Audio  Message
033100  +8 1075  KZ7Y RK4H LO53 (x2)
033215  +8 1075  W8JDP RK4H LO53 (x3)
033400  +5 1075  KF4BI RK4H LO53 (x2)
033600  +5 1075  ZL1OGX RK4H LO53 (x3)
033800  +6 1075  SQ7BKG RK4H -06 (x3)
034100  +4 1075  KJ4QVJ RK4H LO53
034230  +4 1076  ZL1MHS RK4H LO53
10m 
UTC    dB Audio  Message
063900 -19 1083  RK4H UB3DLM 73
064745  +7  344  RK4H UR5ZGY +01
064800 -16 1083  UR5ZGY RK4H R-07
064815 +17  344  RK4H UR5ZGY RR73
064930 -18 1083  UX7QV RK4H R-21
065400 -19 1083  FK8HA RK4H LO53
070745 -17 1088  RK4H II9WWA +00 (x3)
071100  -5 1336  RK4H LB2WD +05 (x3)
091430  -9 2687  RK4H F1PBZ -14
103100 -21 1788  RK4H UB6C RR73
101930 -17 1087  RK4H R1DD 73

Decoder S/N history by band

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