R4RJ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Locator transmitted in a decoded message: LO45

Receiver-side FT8 activity involving R4RJ, decoded by SO8OO in southeastern Poland. 240 related FT8 messages, 36 CQ messages, observed on 80m, 40m, 20m, across 16 UTC dates. Heard between 2026-06-17 and 2026-08-10.

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

240

Related messages

CQ messages

UTC dates heard

-6 dB

Mean decoder S/N

Bands

80m 40m 20m

First seen: 2026-06-17
Last seen: 2026-08-10 17:07 UTC

Frequent QSO partners observed at SO8OO

Stations R4RJ worked most often, as logged from our receiver:

DL1CC · Fed. Rep. of Germany ×2 R4FV · European Russia ×2 RK3AW/P · European Russia RG5A · European Russia LZ3HG · Bulgaria R7FG · European Russia BA7SAY · China R8CC · Asiatic Russia RO2T · European Russia RV3X · European Russia RA6ZD · European Russia BH4GUU · China

Activity Heatmap

Locator transmitted by R4RJ

Approximate centre of LO45, decoded 2026-07-10 17:37 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	R4RJ S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-10 19:05	40m	- / -4	SV2AEL	-7 / -	4	✓ Closing fragment
07-24 15:38	40m	- / -	HG8LXL	-11 / -	3	Partial capture
07-10 17:51	80m	- / -	R6OI	0 / -	2	Partial capture
07-10 17:36	20m	-18 / -	TL8GD	- / -	2	Partial capture
07-09 19:48	40m	- / -18	LZ3HG	-17 / -	2	✓ Closing fragment
07-09 19:43	40m	- / -8	9A4ZM	-10 / -	4	✓ Closing fragment
07-09 19:43	40m	-19 / -11	PE1NPS	-14 / -5	3	Partial capture
07-09 19:35	40m	- / -7	R4FV	-11 / -	4	✓ Closing fragment
07-09 19:28	40m	-15 / +7	UB2FEJ	-19 / -	2	Partial capture
07-09 19:22	40m	- / -14	S59A	+2 / -	2	✓ Closing fragment
07-06 12:21	20m	-16 / -	OH1LA	- / -14	3	Partial capture
07-06 12:18	20m	-14 / -6	F5RRS	-6 / -3	5	Partial capture
07-06 09:11	20m	- / +2	RK3AW/P	-11 / -	2	Partial capture
07-05 19:18	40m	- / -8	OZ9FF	-12 / -	2	Partial capture
07-04 22:12	80m	-6 / -	R8CC	+9 / -4	3	✓ Closing observed
07-04 22:11	80m	-2 / -2	UI5A	0 / -4	4	✓ Full exchange observed
07-04 22:11	80m	-3 / -10	DL3MIB	+12 / -10	10	✓ Full exchange observed
07-04 22:10	80m	-8 / -	UN0GY	- / -6	2	✓ Closing fragment
07-04 22:05	80m	-7 / -	DL9KM	+3 / -13	6	Partial capture
07-04 22:04	80m	-6 / -3	YO6LM	+11 / -	2	✓ Closing observed
07-04 22:04	80m	-6 / -	M1WLK	- / -14	2	✓ Closing fragment
07-04 22:03	80m	-8 / +1	R2EN	+9 / +3	8	✓ Full exchange observed
07-04 22:03	80m	-4 / -2	RM5F	+10 / +3	7	✓ Full exchange observed
07-04 22:02	80m	-6 / -	PY5XT	- / -13	3	✓ Closing fragment
07-04 18:15	20m	- / -	F4HSB	-21 / -	2	✓ Closing fragment
07-04 18:10	20m	- / -6	ON5MX	-14 / -	2	✓ Closing fragment
07-04 17:57	20m	- / -13	F5HNQ	-12 / -	3	✓ Closing fragment
07-04 17:33	20m	- / -7	SV8DCY	-4 / -	2	✓ Closing fragment
07-03 10:44	20m	- / -	IK4LZH	+4 / -	3	✓ Closing fragment
07-03 10:42	20m	- / -15	OE5TXF	-16 / -	2	Partial capture
07-03 10:26	20m	- / -13	RG5A	-3 / -	3	✓ Closing fragment
07-02 15:48	20m	- / -14	RA3XFR	-9 / -	2	Partial capture
06-30 20:02	80m	-13 / -	RZ5D	- / -12	2	✓ Closing fragment
06-30 19:58	80m	- / -4	R3HH	-14 / -	2	✓ Closing fragment
06-30 19:56	80m	-11 / -	UN7BDZ	- / -4	2	✓ Closing fragment
06-30 19:55	80m	-13 / -18	SV1SSL	-14 / -12	4	✓ Full exchange observed
06-30 19:53	80m	-12 / -3	RC6OZ	-2 / -8	5	✓ Full exchange observed
06-30 19:49	80m	-11 / -	RA3TOS	-13 / -10	3	✓ Closing observed
06-30 19:45	80m	-10 / -16	HG8LXL	-2 / -11	7	✓ Full exchange observed
06-30 19:43	80m	-14 / -4	R7FG	-9 / -3	4	✓ Full exchange observed
06-30 19:42	80m	-8 / +3	R3EDI	+5 / -10	4	✓ Full exchange observed
06-30 19:41	80m	-10 / -	UB3AMO	- / -18	2	✓ Closing fragment
06-30 19:39	80m	-10 / -	BH4GUU	- / -11	2	✓ Closing fragment
06-30 19:36	80m	-9 / -10	SP2LHO	+7 / -16	4	✓ Full exchange observed
06-30 19:35	80m	-9 / -3	RO2T	-3 / -	3	✓ Closing observed
06-30 19:32	80m	-7 / -2	RA6ZA	-10 / -11	5	✓ Full exchange observed
06-30 19:31	80m	-9 / -2	RK6OV	-11 / -6	5	✓ Full exchange observed
06-30 19:30	80m	-7 / -9	R4FV	+3 / 0	5	✓ Full exchange observed
06-30 19:29	80m	-8 / +1	DL1CC	-3 / -9	5	✓ Full exchange observed
06-30 19:28	80m	-9 / -6	UA3RLE	-6 / 0	4	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
194545  -7 1263  R4RJ 9A4ZM 73
194815 -17 1736  R4RJ LZ3HG -18 (x2)
172415 -19 1304  T77RN R4RJ LO45 (x2)
173315 -18 1304  SP6FME R4RJ RR73
141400 -22 1440  R4RJ R7CD KN94
153830 -13 1492  R4RJ HG8LXL KN06 (x2)
153930 -24 1906  R4RJ DK7ZT -03
153930 -11 1492  R4RJ HG8LXL KN06
190530 -10 2203  R4RJ SV2AEL KN10 (x4)

20m

UTC    dB Audio  Message
091215  -8  733  R4RJ RK3AW/P +02 (x2)
121445 -19 1244  <...> R4RJ LO45
121800  -1  777  R4RJ F5RRS JN36 (x3)
121915 -14 1243  F5RRS R4RJ -03
121930  -9  778  R4RJ F5RRS R-06
122145 -19 1243  OH1LA R4RJ -14 (x3)
173645 -15 1342  TL8GD R4RJ LO45 (x2)
174415 -24 1341  YO4NF R4RJ R-02
203200 -12  881  R4RJ 7Z1BM -17

80m

UTC    dB Audio  Message
221200  -1  701  UI5A R4RJ RR73
221215 +13 1033  R4RJ DL3MIB JN57
221215  +2 1430  R4RJ UI5A 73
221230  -5  701  R8CC R4RJ R-04
221245  +9  577  R4RJ R8CC RR73
221245  +8 1033  R4RJ DL3MIB JN57
221300  -7  701  R8CC R4RJ 73
221315 +13 1033  R4RJ DL3MIB JN57 (x2)
221400  -1  701  DL3MIB R4RJ -10
221415 +13 1033  R4RJ DL3MIB R-10
221430  -5  701  DL3MIB R4RJ RR73
221445 +10 1033  R4RJ DL3MIB 73
175130  +0 2459  R4RJ R6OI KN87 (x2)

Decoder S/N history by band

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