R3MBV — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO97

Receiver-side FT8 activity involving R3MBV, decoded by SO8OO in southeastern Poland. 1,438 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 69 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-13.

These are automated observations at the SO8OO receiver, not an official contact log. Times are UTC. Attribution follows decoded FT8 message structure: CQ uses the first token and directed-looking messages use the second. Free text that resembles a directed message can be attributed imperfectly. Summary S/N reflects propagation plus SO8OO receiver, antenna and local-noise conditions. Counts are not adjusted for monitoring outages; transmissions that were not decoded are absent. Inferred entity and location data may be inaccurate for portable, remote or special-event operation.

SO8OO decoded 1,438 FT8 messages attributed to R3MBV as the transmitting token by decoded message structure across 69 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (40%), followed by 80 m (27%) and 20 m (24%). Most decodes (77%) fell within the six-hour window 14:00-20:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.

Overview

1,438

Messages attributed

UTC dates decoded

296

Active 15-min windows

-10 dB

Estimated median S/N

Bands

80m · 393 40m · 569 20m · 338 10m · 138

First attributed message: 2026-06-07
Last attributed message: 2026-09-13 05:40 UTC

Observed FT8 message patterns

Attributed sample: 1,438 messages
Active dates: 69 UTC dates
Estimated median S/N: -10 dB
Estimated 10th-90th percentile: -18 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 265, moderate (-15 to -9 dB) 614, strong (≥ -8 dB) 559.

WSJT-X defines S/N reports against a 2,500 Hz reference noise bandwidth. The ranges above are SO8OO receiver-side display categories, not official WSJT-X classes, transmitter-power measurements or estimates of how easy the station is to hear elsewhere. Statistics include only successful decodes on SO8OO's monitored FT8 channels; transmissions that were not decoded are absent.

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with R3MBV in decoded directed-looking exchanges:

UB0SMX/P · Asiatic Russia ×3 DL9KM · Fed. Rep. of Germany ×2 RK6MC · European Russia ×2 R9AL · Asiatic Russia ×2 UI5A · European Russia ×2 R4HHN · European Russia ×2 R4SCB · European Russia ×2 RA4DX · European Russia ×2 RA6OD · European Russia ×2 RK3YWA · European Russia ×2 RN6AK · European Russia ×2 S59A · Slovenia ×2

Attributed messages by UTC hour

Rolling 90-day UTC chart window. Counts follow decoded message structure: the first token for CQ, or the second token in a directed-looking message.

Most frequent locator attributed to R3MBV

The map compares the centres and boundaries of the locator field attributed to this token by decoded message structure, 2° × 1° as a Maidenhead square, and SO8OO's six-character receiver square. The separation is not an exact antenna-to-antenna distance or a radio-path length.

Attributed locator: KO97 · 752 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,404 km (approx.)
Last such locator decoded: 2026-09-13 05:40 UTC

A decoded locator can describe portable, remote or special-event operation and is not proof of a permanent station address or transmitter identity.

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	R3MBV S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-13 05:13	40m	-17 / -	R4AGE/P	- / -11	2	Partial capture
09-11 17:38	80m	-11 / -	UB3ADO/P	- / -	2	Partial capture
09-09 16:26	80m	-5 / -	EY8BL	- / -	2	Partial capture
09-09 16:25	80m	-5 / -	SQ100PKP	- / -	2	Partial capture
09-09 16:10	80m	-9 / -11	UN3P	-21 / -2	4	✓ Full exchange observed
09-09 16:08	80m	- / -4	UA3NCN	-14 / -	2	✓ Closing fragment
09-09 16:06	80m	-7 / +7	R3XBV	-22 / -4	4	✓ Full exchange observed
09-09 16:03	80m	-10 / -	RM2P	-15 / -	3	✓ Closing observed
09-09 16:00	80m	-7 / -	UA9MMZ	- / -6	3	✓ Closing fragment
09-09 15:42	40m	-8 / -	UB4HTD	- / -	2	Partial capture
09-09 15:40	40m	-2 / -	RK3YWA	- / -16	4	✓ Closing fragment
09-09 15:35	80m	- / +8	RA4FP	-4 / -	2	✓ Closing fragment
09-08 17:58	80m	-12 / -	RA3DEP	- / -1	4	✓ Closing fragment
09-08 17:54	80m	-11 / -	R4HNI	- / -16	4	✓ Closing fragment
09-08 17:50	80m	-6 / -	RQ3D	- / -11	2	✓ Closing fragment
09-08 17:48	80m	-5 / -	UB3PDB	- / -7	3	✓ Closing fragment
09-08 17:44	80m	-9 / -7	R4HNW	-2 / 0	4	✓ Full exchange observed
09-08 17:41	80m	-11 / -8	RN4HAB	-6 / -3	5	✓ Full exchange observed
09-08 17:24	80m	-7 / -	RQ3D	- / -13	3	Partial capture
09-08 17:22	80m	-13 / -	R4CGK	- / -12	3	✓ Closing fragment
09-08 17:20	80m	-6 / -	RV9WJP	- / -25	3	Partial capture
09-08 17:14	80m	-9 / -7	RK3YWA	-6 / -9	7	✓ Full exchange observed
09-07 04:09	40m	-9 / -10	SM3ULU	-12 / -18	4	✓ Full exchange observed
09-07 04:08	40m	-6 / -14	CR7BRV	-9 / -10	4	✓ Full exchange observed
09-06 17:36	80m	-5 / -	RC3RD	- / -	2	Partial capture
09-06 17:35	80m	-5 / -	R9CS/P	- / -	2	Partial capture
09-06 17:22	80m	-10 / -	R9CS/P	- / -	7	Partial capture
09-06 17:17	80m	-11 / -	R9CS/P	- / -	2	Partial capture
09-06 17:15	80m	-7 / -16	RN6AK	-1 / -4	5	✓ Closing observed
09-06 17:12	80m	-6 / +1	R2GFN	-7 / -4	6	✓ Full exchange observed
09-06 04:33	40m	-14 / -	RW9AW	- / -4	3	✓ Closing fragment
09-05 16:23	80m	-10 / -	R2AVW	- / +2	2	Partial capture
09-05 16:13	80m	-14 / +7	R3KLE	-4 / -	3	✓ Closing observed
09-05 16:03	80m	- / -18	R3PJ	-3 / -	3	✓ Closing fragment
09-05 15:48	40m	-10 / -	AP2N	- / -17	4	Partial capture
09-05 15:44	40m	-6 / -	RA1PO	- / -13	3	✓ Closing fragment
09-05 15:41	40m	-9 / -	R4HBO	-17 / -2	4	✓ Closing observed
08-31 18:08	80m	- / -5	UB6OAK	-18 / -	5	Partial capture
08-31 18:06	80m	- / -12	RW3YS	+7 / -	2	✓ Closing fragment
08-30 16:29	80m	-18 / -	RA9MAI	- / -6	2	✓ Closing fragment
08-30 16:24	40m	-4 / -	UB8CSU	- / -	2	Partial capture
08-30 16:18	40m	-6 / +4	RM6OG	-12 / -8	4	✓ Full exchange observed
08-30 16:17	40m	-7 / -	2I0WAI	- / -10	3	✓ Closing fragment
08-30 16:11	40m	0 / -7	R5BM/M	-2 / 0	3	Partial capture
08-30 16:02	40m	-6 / +3	R2UZ/P	-16 / -	4	✓ Closing observed
08-29 18:50	80m	-10 / -	UA1OIZ	- / -	2	Partial capture
08-29 17:41	80m	-14 / -11	RO6OP	+11 / -2	6	✓ Full exchange observed
08-29 17:39	80m	-8 / -	R4HLM	-15 / -5	4	✓ Closing observed
08-29 17:34	80m	-8 / -	R2EA/P	- / -	2	Partial capture
08-29 17:31	80m	-19 / -	UB3BAE/P	- / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
040900  -7  963  CR7BRV R3MBV 73
040915 -15  962  R3MBV SM3ULU JP81
040930  -9  963  SM3ULU R3MBV -18
040945 -10  962  R3MBV SM3ULU R-10
041000  -9  963  SM3ULU R3MBV RR73
154000  -2 1016  RK3YWA R3MBV KO97 (x4)
154245  -8 1013  UB4HTD R3MBV KO97 (x2)
155215  -1  908  R4HKO R3MBV KO97
051330 -17 1759  R4AGE/P R3MBV KO97 (x2)
054030 -13 1640  R4HOH R3MBV KO97

80m

UTC    dB Audio  Message
160845 -15 2004  R3MBV UA3NCN RR73
161045  -9  982  UN3P R3MBV KO97
161100 -21 1450  R3MBV UN3P -11
161115 -10  982  UN3P R3MBV R-02 (x2)
162330  -5 2272  R3PJV R3MBV KO97
162515  -6 2271  SQ100PKP R3MBV KO97 (x2)
162645  -5 2273  EY8BL R3MBV KO97 (x2)
163130  +6 2864  R3MBV UA1CEI/3 -02
173415  +4 1282  RA4CQW/P R3MBV KO97 (x2)
173830  -9 1090  UB3ADO/P R3MBV KO97 (x2)

20m

UTC    dB Audio  Message
071945  -3  940  N8HRZ R3MBV KO97 (x3)
072230  +2  940  R4KO R3MBV KO97
072315 -11 1743  R3MBV RA6YDX R+01
072615  -8  939  ZV8R R3MBV KO97
093215  +1 1077  TK/DJ0TP R3MBV KO97 (x2)
093530  +4  977  <...> R3MBV KO97 (x2)
113945 +11  880  R2FDP/P R3MBV KO97 (x3)
084115 -20 1224  R0WBN/P R3MBV KO97 (x2)

10m

UTC    dB Audio  Message
173800 -10  741  R6OAA R3MBV KO97
173815 -16 1791  R3MBV R6OAA -06
173830  -9  740  R6OAA R3MBV R-10
173845 -17 1792  R3MBV R6OAA RR73
173900 -10  740  R6OAA R3MBV 73
173930  -6  739  R6OER R3MBV KO97
174215  -7 2289  R3MBV RN6LBA -08 (x2)
174400 -13 1160  RA5AK R3MBV KO97 (x2)
174600 -11 1158  RU3SD R3MBV KO97
102630 -11  653  R2FBW R3MBV KO97
110700 -18 1170  RA3YDA R3MBV -11
110830 -18 1171  R4DI R3MBV KO97
140145 -24 1882  R3MBV RK6MC RR73

Decoder S/N history by band

Count-weighted daily averages across messages attributed to this profiled token and successfully decoded at SO8OO, limited to the rolling 90-day UTC chart window.

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