R3BCK — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO85

Receiver-side FT8 activity involving R3BCK, decoded by SO8OO in southeastern Poland. 3,548 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 21 UTC dates in the available aggregate history. Observed between 2026-06-11 and 2026-09-05.

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 3,548 FT8 messages attributed to R3BCK as the transmitting token by decoded message structure across 21 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (50%), followed by 40 m (24%) and 10 m (20%). Decoded messages were spread across the UTC day; the busiest six-hour window (18:00-00:00 UTC) held 33% of decodes. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (97%); the estimated median was 0 dB.

Overview

3,548

Messages attributed

UTC dates decoded

270

Active 15-min windows

0 dB

Estimated median S/N

Bands

80m · 165 60m · 71 40m · 861 20m · 1,758 10m · 693

First attributed message: 2026-06-11
Last attributed message: 2026-09-05 23:56 UTC

Observed FT8 message patterns

Attributed sample: 3,548 messages
Active dates: 21 UTC dates
Estimated median S/N: 0 dB
Estimated 10th-90th percentile: -6 to +8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 106, strong (≥ -8 dB) 3,438.

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 R3BCK in decoded directed-looking exchanges:

R6ML · European Russia ×3 DH8BQA · Fed. Rep. of Germany ×2 R6OM · European Russia ×2 RX3AEX · European Russia ×2 RX6AOB · European Russia ×2 DL6LAG · Fed. Rep. of Germany ×2 OH3OJ · Finland ×2 R3ICU · European Russia ×2 R6LNH · European Russia ×2 YO4GIY · Romania ×2 R5DT · European Russia ×2 RC6OT · European Russia ×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 R3BCK

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: KO85 · 2,930 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,193 km (approx.)
Last such locator decoded: 2026-09-05 23:56 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	R3BCK S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-05 23:55	80m	-8 / -	SP9GCZ	- / -	3	Partial capture
09-05 23:53	80m	-3 / -	LA2W/P	- / -	3	Partial capture
09-05 23:51	80m	-4 / -	SP9GCZ	- / -	3	Partial capture
09-05 23:49	80m	-7 / -	RA9YTI	- / -	3	Partial capture
09-05 23:35	80m	-5 / -	SN40KZE	- / -	17	Partial capture
09-05 23:26	80m	-3 / -	OU7M/P	- / -	9	Partial capture
09-05 23:22	80m	-2 / +2	LA9H	-2 / -12	11	✓ Full exchange observed
09-05 23:08	80m	-1 / -	OU7M/P	- / -	20	Partial capture
09-05 23:05	80m	-3 / -7	RC2Y	+2 / -8	7	✓ Full exchange observed
09-05 23:04	80m	-3 / -	SP100PKP	- / -	2	Partial capture
09-05 23:00	80m	-2 / -9	RY3F	+7 / -10	5	✓ Full exchange observed
09-04 19:23	40m	+4 / -8	R4RZ	-7 / -6	9	✓ Full exchange observed
09-04 19:21	40m	+8 / -	IK2VFR/P	- / -	3	Partial capture
09-04 19:19	40m	+7 / -	RG6ZF	- / -	3	Partial capture
09-04 19:14	40m	+5 / -10	RL6K	+1 / -13	8	Partial capture
09-04 19:10	40m	+4 / -	TA5DOB	- / -	3	Partial capture
09-04 19:06	40m	+6 / -	RV6HEG	- / -17	7	✓ Closing fragment
09-04 18:50	40m	- / +1	RC6OT	+4 / -	3	✓ Closing fragment
09-04 18:45	40m	- / -24	IK6GPZ	+3 / -	10	Partial capture
09-04 18:36	40m	+3 / -	RT1I	- / -7	5	Partial capture
09-04 18:21	40m	+3 / -10	YU1BV	+9 / -	6	Partial capture
09-04 18:13	40m	- / -	UB3DRL	+1 / -	2	Partial capture
09-04 18:12	40m	+4 / -	RM1F	- / -	12	Partial capture
09-04 18:09	40m	0 / +3	DF5KX	+4 / -16	12	Partial capture
09-04 18:06	40m	+2 / -	SP6CA	- / -	3	Partial capture
09-04 18:03	40m	- / -	UA9SY	-8 / -	2	Partial capture
09-04 18:02	40m	+3 / 0	RQ4F	+3 / -9	9	✓ Full exchange observed
09-04 17:58	40m	+5 / -	RA1AGA	- / -9	5	Partial capture
09-04 17:50	40m	+2 / -	RW6B	- / -	9	Partial capture
09-04 17:39	40m	- / -4	ON1DGN	-22 / -	2	Partial capture
09-04 17:38	40m	+3 / -	UT5ZC	- / -	17	Partial capture
09-04 17:38	80m	- / -	DH8BQA	+16 / -	2	✓ Closing fragment
09-04 17:36	40m	+8 / -	UR4QWW	- / -	3	Partial capture
09-04 17:33	40m	+3 / -	DH8BQA	+18 / -5	7	✓ Full exchange observed
09-04 17:25	40m	+3 / -	EU4BD	- / -	3	Partial capture
09-04 17:23	40m	- / -9	S54ZGA	-5 / -	4	Partial capture
09-04 17:21	40m	+3 / -4	R3TY	+5 / -11	9	✓ Full exchange observed
09-04 17:19	40m	-1 / -	RA9SOZ	- / -	3	Partial capture
09-04 17:15	40m	+1 / -	UT5ZC	- / -	6	Partial capture
09-04 17:10	40m	-1 / -	R4HGK	- / -8	7	Partial capture
09-04 17:08	40m	-5 / -	UT5ZC	- / -	3	Partial capture
09-04 17:03	40m	-3 / -	R9FAK	- / -12	7	✓ Closing fragment
09-04 17:01	40m	-2 / -	OE2CAL	- / -	3	Partial capture
09-04 16:57	40m	-3 / -	UT5ZC	- / -	6	Partial capture
09-04 16:53	40m	-5 / -	SP9TEX	0 / -10	11	✓ Full exchange observed
09-04 16:46	40m	+4 / -	UT5ZC	- / -	3	Partial capture
09-04 16:34	40m	-6 / -	R7IW	- / -	2	Partial capture
09-04 16:28	40m	0 / -	UT5ZC	- / -	8	Partial capture
09-04 16:26	40m	+2 / -	UA9LLB	- / -	2	Partial capture
08-30 03:54	40m	-1 / -	OH3DIG	- / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
234930 -10 2903  RA9YTI R3BCK KO85 (x2)
235030  -7 2903  CQ R3BCK KO85
235100  -2 2903  SP9GCZ R3BCK KO85 (x3)
235230  -3 2903  CQ R3BCK KO85
235300  -7 2903  LA2W/P R3BCK KO85 (x3)
235430  -3 2903  CQ R3BCK KO85 (x2)
235530 -11 2903  SP9GCZ R3BCK KO85 (x3)

40m

UTC    dB Audio  Message
192130  +9 2940  IK2VFR/P R3BCK KO85 (x2)
192230  -1 2940  CQ R3BCK KO85
192300  +4 2940  R4RZ R3BCK KO85 (x2)
192345  -7 2097  R3BCK R4RZ -08
192400  +4 2940  R4RZ R3BCK KO85
192415  -8 2099  R3BCK R4RZ -09
192430  +4 2940  R4RZ R3BCK R-06
192445  -6 2096  R3BCK R4RZ RR73
192500  +6 2940  R4RZ R3BCK R-07 (x2)
192600  +8 2940  CQ R3BCK KO85 (x2)
192700  +5 2940  M1DBW R3BCK KO85

20m

UTC    dB Audio  Message
084030 -10 2803  R3BCK RA7Z KN98
084045  -3 2897  CQ R3BCK KO85
084200  -1 2898  <...> R3BCK KO85
084230  -3 2897  CQ R3BCK KO85 (x2)
084315 -12 2898  R3BCK EA1AEC IN52
084330  -7 2897  CQ R3BCK KO85
084515  +3 2898  RO6OP R3BCK KO85
084545  +4 2897  CQ R3BCK KO85 (x7)

60m

UTC    dB Audio  Message
214230  +0 1832  R3BCK LY8O -05 (x2)
214315  +6 2933  LY8O R3BCK R-06
214330  -5  658  R3BCK S56FPW JN76
214330  -1 1832  R3BCK LY8O RR73
214345  +1 2933  LY8O R3BCK R-04
214400  -7  658  R3BCK S56FPW JN76
214400  -4 1832  R3BCK LY8O RR73
214415  +0 2933  LY8O R3BCK 73 (x2)
214515  +2 2933  CQ R3BCK KO85
214530 -13  781  R3BCK G1UAF JO02
214600 -10 1043  R3BCK S56FPW JN76 (x2)
214700 -14  781  R3BCK G1UAF JO02

10m

UTC    dB Audio  Message
193045  +5 2616  R3BCK IK1RQX JN44 (x7)
193545  +5 2991  R3BCK M0BEW -12 (x6)
195615 -20 2024  R3BCK UB6OCP RR73
090415  -5 2983  R3BCK OZ5AGJ JO47

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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