R3BCK — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

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. 4,283 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, 10m, across 27 UTC dates in the available aggregate history. Observed between 2026-06-11 and 2026-10-18.

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 4,283 FT8 messages attributed to R3BCK as the transmitting token by decoded message structure across 27 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (41%), followed by 40 m (27%) and 10 m (16%). The busiest six-hour window was 17:00-23:00 UTC, containing 41% of decodes. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (94%); the estimated median was -1.1 dB.

Overview

4,283

Messages attributed

UTC dates decoded

324

Active 15-min windows

-1.1 dB

Estimated median S/N

Bands

160m · 7 80m · 544 60m · 104 40m · 1,177 20m · 1,758 10m · 693

First attributed message: 2026-06-11
Last attributed message: 2026-10-18 06:30 UTC

Observed FT8 message patterns

Attributed sample: 4,283 messages
Active dates: 27 UTC dates
Estimated median S/N: -1.1 dB
Estimated 10th-90th percentile: -7 to +7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 8, moderate (-15 to -9 dB) 240, strong (≥ -8 dB) 4,035.

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:

YL3CW · Latvia ×3 R5AV · European Russia ×2 R5BM · European Russia ×2 UA1OMS · European Russia ×2 3Z4DX · Poland ×2 DF8RU · Fed. Rep. of Germany ×2 DH8BQA · Fed. Rep. of Germany ×2 R3ES · European Russia ×2 R3ICU · European Russia ×2 R3LDK · European Russia ×2 R6OM · European Russia ×2 RW3DDZ · 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 · 3,489 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,193 km (approx.)
Last such locator decoded: 2026-10-18 06:30 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
10-18 06:16	40m	-5 / -	RK3YWS/P	- / -	14	Partial capture
10-18 06:14	40m	-1 / -	<...>	- / -	3	Partial capture
10-18 06:12	40m	- / -15	R6KY	-10 / -	2	Partial capture
10-18 06:11	40m	+2 / -	EU2ABM	- / -	2	✓ Closing fragment
10-18 06:06	40m	-4 / -7	R2AL	-3 / -	7	✓ Closing observed
10-18 06:02	40m	- / -	PG0T	-13 / -	2	Partial capture
10-18 06:01	40m	- / -	R2AL	0 / -	2	Partial capture
10-18 06:01	40m	-6 / -2	R3XDT	-3 / -15	7	✓ Full exchange observed
10-18 05:58	40m	- / -	PG0T	-19 / -	2	Partial capture
10-18 05:47	40m	-6 / -	UA4CGR	- / -13	2	✓ Closing fragment
10-18 05:46	40m	-7 / -	R4FDD	-6 / -	3	✓ Closing observed
10-18 05:44	40m	- / -12	IK4JPP	+1 / -	3	Partial capture
10-18 05:39	40m	-4 / -7	LZ2TDF	-2 / -7	10	✓ Full exchange observed
10-17 17:54	60m	-4 / -	OH3MB	+12 / -6	5	✓ Full exchange observed
10-17 17:50	60m	-2 / -13	EA1IOK	-3 / -14	13	✓ Full exchange observed
10-17 17:49	60m	-2 / +10	OH3MB	-9 / -8	6	Partial capture
10-17 17:28	80m	+1 / -	RW4F	- / -	6	Partial capture
10-17 17:24	80m	0 / -	RG3M	- / -	6	Partial capture
10-17 17:21	80m	-2 / -19	UA3VFL	-9 / -9	5	Partial capture
10-03 20:51	40m	-4 / +6	IV3IHV	-15 / -7	6	✓ Full exchange observed
10-03 20:48	40m	-5 / -	RA7KW	- / -16	5	Partial capture
10-03 20:32	40m	-4 / -6	PA3FR	-8 / -9	10	✓ Full exchange observed
10-03 20:27	40m	-5 / -	SH0EPN	- / -	3	Partial capture
10-03 20:25	40m	-5 / -4	DG7BBU	+8 / -17	17	✓ Full exchange observed
10-03 20:23	40m	-8 / -	9A3J	-14 / -10	4	✓ Closing observed
10-03 20:19	40m	-6 / -	9A3J	- / -	2	Partial capture
10-03 20:13	40m	-2 / -18	PD0OTH	-14 / -	4	Partial capture
10-03 20:04	40m	-8 / -7	SV5ADM	-12 / -11	5	Partial capture
10-03 19:50	40m	-2 / -	RX6ACR	- / -	2	✓ Closing fragment
10-03 19:39	40m	-6 / -	OH5KZ	- / -	4	Partial capture
10-03 19:25	40m	- / -	PA3AGN	-9 / -	2	Partial capture
10-03 19:24	40m	- / +4	PA2WDR	+8 / -	7	Partial capture
10-03 19:15	40m	-5 / -	RT3K/P	- / -	2	Partial capture
10-03 19:12	40m	-3 / -	PD1AQL	- / -	3	Partial capture
10-03 19:08	40m	-2 / -	ES4TRI	- / -	2	Partial capture
10-03 19:01	40m	-2 / -	M7CWF	-16 / -14	6	✓ Closing observed
10-03 18:59	40m	-4 / -	RM8CZ	- / -	2	Partial capture
10-03 18:54	40m	-3 / -1	DJ6VX	+16 / -16	10	✓ Full exchange observed
10-03 18:51	40m	-4 / -9	SP5MXZ	-17 / -14	7	✓ Full exchange observed
10-03 18:46	40m	-1 / -	UD1I	- / -14	2	✓ Closing fragment
10-03 18:44	40m	-4 / -14	ON7DE	-9 / -13	13	Partial capture
10-03 18:42	40m	-8 / -	OH5KZ	- / -	5	Partial capture
10-03 18:00	40m	-5 / -	IU8CPQ	- / -	3	Partial capture
10-03 17:58	40m	-4 / -	RN3KY	- / -	2	Partial capture
10-03 17:51	40m	-4 / -12	R6OK	-13 / -13	7	Partial capture
10-03 17:46	40m	-8 / -6	RA3WPF	-10 / -9	7	✓ Full exchange observed
10-03 17:43	40m	-8 / -	EX7CQ	- / -	2	Partial capture
10-03 17:41	40m	-8 / -6	HB9ELE	+10 / -16	12	✓ Full exchange observed
10-03 17:35	40m	-6 / -	EX7CQ	- / -	2	Partial capture
10-03 17:31	40m	-7 / -3	R4PFY	-13 / -13	6	✓ 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
061945  -5 2880  RK3YWS/P R3BCK KO85
062015  -6 2880  CQ R3BCK KO85
062045  +1 2880  RK3YWS/P R3BCK KO85 (x3)
062215  -1 2880  CQ R3BCK KO85
062245  -5 2880  RK3YWS/P R3BCK KO85 (x4)
062615  -3 2880  CQ R3BCK KO85
062645  -6 2880  RK3YWS/P R3BCK KO85 (x2)
062815 -10 2879  CQ R3BCK KO85 (x2)

60m

UTC    dB Audio  Message
175130  +0 2875  EA1IOK R3BCK -14
175145  -4  591  R3BCK EA1IOK R-13
175200  -2 2875  EA1IOK R3BCK -14
175215  -4  591  R3BCK EA1IOK R-13 (x2)
175300  -6 2875  EA1IOK R3BCK RR73
175315  -4  591  R3BCK EA1IOK 73
175330  -1 2875  EA1IOK R3BCK RR73 (x2)
175415 +13 2875  R3BCK OH3MB +15
175430  -1 2875  EA1IOK R3BCK KO85
175445 +11 2875  R3BCK OH3MB +15
175500  -4 2875  OH3MB R3BCK R-06
175515 +11 2875  R3BCK OH3MB RR73
175530  -3 2875  OH3MB R3BCK 73

80m

UTC    dB Audio  Message
172630  -1 2843  RG3M R3BCK KO85 (x2)
172730  +0 2843  CQ R3BCK KO85
172800  +3 2843  RW4F R3BCK KO85 (x3)
172930  +1 2843  CQ R3BCK KO85
173000  +1 2843  RW4F R3BCK KO85 (x3)
173130  +0 2843  CQ R3BCK KO85
173200  +2 2843  RG3M R3BCK KO85
173330  +2 2843  CQ R3BCK KO85
173430  -3 2844  R1CBW R3BCK KO85
173530  -7 2843  CQ R3BCK KO85

160m

UTC    dB Audio  Message
204845  +3 2837  R3BCK R5BM R-10
204900 -12 2895  R5BM R3BCK RR73
204915 -11 2099  R3BCK R5BM 73 (x2)
205315  -7 1036  R3BCK R2PT KO84
205400  -6 2896  CQ R3BCK KO85
205415 -11 1036  R3BCK R2PT KO84 (x4)
205630  -7 2896  CQ R3BCK KO85
205645  -9 1036  R3BCK R2PT KO84
205930  -7 2897  CQ R3BCK KO85 (x2)
171800  -7 2842  PI4DX 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)

10m

UTC    dB Audio  Message
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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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