RK4FF — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia

Receiver-side FT8 activity involving RK4FF, decoded by SO8OO in southeastern Poland. 609 related FT8 messages, 18 CQ messages, observed on 160m, 80m, 40m, 20m, 10m, across 45 UTC dates. Heard between 2026-05-23 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

609

Related messages

CQ messages

UTC dates heard

-8 dB

Mean decoder S/N

Bands

80m 20m 40m 10m 160m

First seen: 2026-05-23
Last seen: 2026-08-22 01:30 UTC

Frequent QSO partners observed at SO8OO

Stations RK4FF worked most often, as logged from our receiver:

EA1RFF · Spain ×2 IK2YYO · Italy ×2 RI0FA · Asiatic Russia ×2 BH1PYG · China ×2 MI7XHT · Northern Ireland ×2 SP5CI · Poland ×2 IQ0VT · Italy ×2 HL3LMS · Republic of Korea ×2 F4HSB · France ×2 TJ1GD/P · Cameroon ×2 SP9LS · Poland ×2 R95WTA · European Russia ×2

Activity Heatmap

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	RK4FF S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-22 07:20	20m	+10 / -	DL6CWM	- / -11	2	Partial capture
08-22 07:19	20m	+13 / -	UB3BCT	- / +2	2	✓ Closing fragment
08-22 04:18	20m	-5 / -	ON4JL	- / +1	5	Partial capture
08-22 02:58	20m	-15 / -	HI8DX	- / -7	3	Partial capture
08-22 02:57	20m	-19 / -	KF0PBS	- / -8	2	Partial capture
08-22 02:54	20m	-18 / -	K0RKF	- / -11	2	✓ Closing fragment
08-22 02:35	20m	- / -6	D2IM	-17 / -	2	✓ Closing fragment
08-21 07:15	20m	-7 / -	M8KHC	-24 / -	2	✓ Closing observed
08-21 07:11	20m	-4 / -	SO1CJ	- / +4	2	✓ Closing fragment
08-21 07:10	20m	-8 / -6	F1JPG	-18 / -	3	✓ Closing observed
08-21 07:04	20m	-10 / -	4X4DK	-4 / 0	4	✓ Closing observed
08-21 07:02	20m	-3 / -	VJ2Q	- / -18	3	Partial capture
08-21 06:58	20m	-8 / -	ON7DJ	- / -4	2	Partial capture
08-21 06:53	20m	-4 / +2	R3BIS	-1 / +8	2	Partial capture
08-21 06:50	20m	-5 / -	ON7DJ	- / +7	4	Partial capture
08-21 06:44	20m	- / -8	IK2ECC	-13 / -	3	Partial capture
08-21 06:44	20m	- / +3	RA3PGR	-9 / -	2	✓ Closing fragment
08-21 06:40	20m	-3 / -	SQ8OAU	- / -1	3	Partial capture
08-21 06:38	20m	-2 / -	EW6CY	- / +8	4	Partial capture
08-21 06:36	20m	0 / -	M0GLV	- / -15	2	✓ Closing fragment
08-21 06:32	20m	-8 / -	M7HQE	- / +10	3	✓ Closing fragment
08-21 06:29	20m	-3 / -	R3DDS	- / -7	3	✓ Closing fragment
08-21 06:27	20m	-4 / -19	IW2IDB	-24 / -17	8	✓ Full exchange observed
08-21 06:26	20m	-5 / -	4X4DK	- / -13	2	Partial capture
08-21 06:24	20m	+4 / -	IS0AFM	- / -6	3	Partial capture
08-21 06:22	20m	0 / -	EA1RFF	- / -13	4	✓ Closing fragment
08-21 06:20	20m	+2 / -	R1TET	- / -6	2	✓ Closing fragment
08-21 06:18	20m	-8 / -	SQ7FPH	-8 / +9	3	✓ Closing observed
08-21 06:13	20m	-3 / -	EA1RFF	- / -7	8	Partial capture
08-21 06:12	20m	-4 / -	<...>	- / -8	2	Partial capture
08-21 06:11	20m	-2 / -	RV3ML	- / +9	2	✓ Closing fragment
08-21 06:09	20m	-4 / -	UA3MLR	- / -8	3	✓ Closing fragment
08-21 06:07	20m	-1 / -	M7EOI	- / -8	4	Partial capture
08-21 06:03	20m	0 / -	EA1RFF	- / -12	2	Partial capture
08-21 06:01	20m	+4 / -	IS0AFM	- / -6	2	Partial capture
08-21 05:59	20m	+3 / -5	EA1KCU	-10 / -1	3	✓ Full exchange observed
08-21 05:58	20m	+6 / -	F5MOO	-11 / +5	4	✓ Closing observed
08-21 05:56	20m	+3 / -	TA4INO	- / -16	4	Partial capture
08-21 05:54	20m	+20 / -	SP6JIU	- / -5	2	✓ Closing fragment
08-21 05:53	20m	+16 / -	SP7PA	- / -6	3	✓ Closing fragment
08-21 05:51	20m	0 / -	VK2SMP	- / -7	3	Partial capture
08-21 05:49	80m	- / -	SP3IPA	-8 / -	3	Partial capture
08-21 05:49	20m	0 / +1	IK2YYO	-8 / +4	4	✓ Full exchange observed
08-21 05:49	20m	+10 / -	F5MOO	- / +7	2	Partial capture
08-21 05:47	20m	+11 / -	PA3EZB	- / -6	3	Partial capture
08-21 05:46	20m	+13 / -	DF4FS	- / -8	3	✓ Closing fragment
08-21 05:44	20m	+6 / -	YT1DDL	- / -5	4	Partial capture
08-21 05:42	20m	+6 / -	IS0AFM	- / -7	4	Partial capture
08-21 05:40	20m	+8 / -	F5MOO	- / -8	2	Partial capture
08-21 05:38	20m	-1 / -	SP8S/P	- / -17	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
030130 -11  285  N1JUD RK4FF +03
030900 -10 1062  RK4FF K3MEC R+05
031000 -19 2110  RK4FF NA3M R+05
033030 -21 1359  RK4FF IZ8EYN -17
041745  -7 1330  VK4FFF RK4FF RR73
041815  -5 1227  ON4JL RK4FF +01 (x5)
071945 +15 2592  UB3BCT RK4FF +02 (x2)
072045 +10 2107  DL6CWM RK4FF -11 (x2)
072145  +8 2477  UA3IDQ RK4FF -11

80m

UTC    dB Audio  Message
183245 -11 2010  RK4FF OZ1GC 73
183415 -23 1588  DL2RN RK4FF -18 (x3)
183530  -7 1571  RK4FF DL2RN R-16
183545 -22 1588  DL2RN RK4FF RR73
183600  -8 1571  RK4FF DL2RN 73
183700  -6 1221  YO3HUI RK4FF -17
183730  -6 2640  DO9AND/P RK4FF -18
184145 -12 1360  RK4FF IZ0PMP R-14 (x3)
054945  -7  981  RK4FF SP3IPA JO82 (x3)

40m

UTC    dB Audio  Message
022730  +3 1134  F5NBU RK4FF -01
022800  -1 1744  OA4DPM RK4FF -14 (x2)
023030  +2 2032  F5NBU RK4FF +03 (x3)
023145  -7 1104  RK4FF UA3RBM -06 (x3)
023245  +0 2065  II7MGBT RK4FF +11 (x2)
023400  -2 2065  RK4FF II7MGBT R+04
023500  -8 1104  RK4FF UA3RBM -01 (x2)
023600  -5 1867  OA4DPM RK4FF -15

10m

UTC    dB Audio  Message
112600 -12 2392  DN9OPA RK4FF -02 (x2)
112730 -20 2143  DL9ATW RK4FF -22 (x2)
112900 -16 1304  <...> RK4FF +08
113115  -8 2892  DN9BLN RK4FF -10
113130  +2 2892  RK4FF DN9BLN R-01 (x2)
113600 -17  846  SQ5NAN RK4FF RR73
113630 -20 1304  <...> RK4FF -01
113715 -11 2575  OH1ZE RK4FF -04
114015 -22 1508  YU4EA RK4FF -10
132130 -22 1612  RK4FF IU8QTW R-06 (x3)

160m

UTC    dB Audio  Message
193330  -5 1568  RK4FF DL6NDN R-06

Decoder S/N history by band

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