R4RB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LO55

Receiver-side FT8 activity involving R4RB, decoded by SO8OO in southeastern Poland. 80 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 10m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-22 and 2026-09-15.

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 80 FT8 messages attributed to R4RB as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (88%), followed by 160 m (5%) and 10 m (5%). Most decodes (100%) fell within the six-hour window 17:00-23:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (73%); the estimated median was -5 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-5 dB

Estimated median S/N

Bands

160m · 4 80m · 70 40m · 2 10m · 4

First attributed message: 2026-06-22
Last attributed message: 2026-09-15 17:57 UTC

Observed FT8 message patterns

Attributed sample: 80 messages
Active dates: 5 UTC dates
Estimated median S/N: -5 dB
Estimated 10th-90th percentile: -18 to +6 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 12, moderate (-15 to -9 dB) 10, strong (≥ -8 dB) 58.

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 R4RB in decoded directed-looking exchanges:

EA8UP · Canary Islands R5KH · European Russia R7RDE · European Russia UA9QFF · Asiatic Russia R2ATY · European Russia R2DRE · European Russia R7CD · European Russia R9TS · Asiatic Russia RA9YTI · Asiatic Russia RT2P · European Russia RU3OW · European Russia UG4L · European Russia

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 R4RB

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: LO55 · 35 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,045 km (approx.)
Last such locator decoded: 2026-09-15 17:44 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	R4RB S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-15 17:52	80m	- / -15	UC6D	+6 / -	2	✓ Closing fragment
09-15 17:51	80m	-8 / +1	R2APC	-18 / -17	3	✓ Full exchange observed
09-15 17:45	80m	- / -	RA3WPF	-6 / -	2	Partial capture
09-15 17:44	80m	-14 / -	RD7O	-7 / -13	3	✓ Closing observed
09-15 17:41	80m	-14 / -	R9CP	- / -14	2	✓ Closing fragment
09-15 17:38	80m	-12 / -8	R3BDQ	-8 / -14	6	✓ Full exchange observed
09-15 17:25	160m	- / -10	R2DRE	-12 / -	2	✓ Closing fragment
09-15 17:22	160m	-18 / 0	UG4L	-16 / -	4	✓ Closing observed
09-15 17:15	160m	- / -13	OM3SX	+7 / -	6	Partial capture
09-15 17:13	160m	-24 / -19	RA9YTI	-24 / -6	3	✓ Full exchange observed
08-04 17:58	80m	- / -13	RW2Z	-8 / -	3	✓ Closing fragment
08-04 17:54	80m	- / -8	UB3LCO	-6 / -	3	✓ Closing fragment
08-04 17:32	80m	- / -12	UA9FFV	-2 / -	2	✓ Closing fragment
08-04 17:24	80m	- / -4	RC6OZ	-7 / -	4	Partial capture
06-28 19:54	40m	- / -11	UB6LDM	-14 / -	2	✓ Closing fragment
06-28 19:34	80m	- / -	SP6OHU	-12 / -	2	Partial capture
06-28 19:31	80m	-7 / -	R8CGI	- / -10	2	✓ Closing fragment
06-28 19:10	160m	- / -13	R7CD	-4 / -	3	✓ Closing fragment
06-28 19:07	160m	- / -21	RT2P	-2 / -	3	✓ Closing fragment
06-28 19:04	160m	- / +5	RU3OW	-1 / -	4	✓ Closing fragment
06-27 05:50	40m	- / -15	DD7EE	-12 / -	2	✓ Closing fragment
06-26 20:33	80m	-11 / +3	R6OQ	-15 / -12	6	✓ Full exchange observed
06-26 20:33	80m	-5 / -	R9HBI	-24 / -10	3	✓ Closing observed
06-26 20:30	80m	-4 / +1	RZ3DW	+8 / 0	6	✓ Full exchange observed
06-26 20:28	80m	-4 / -3	RA3WY	+2 / +1	6	✓ Full exchange observed
06-26 20:22	10m	- / -12	R7RDE	+2 / -	3	✓ Closing fragment
06-26 20:17	10m	- / +4	EA8UP	-2 / -	2	✓ Closing fragment
06-26 18:38	10m	- / -	RW6HP	-12 / -	4	Partial capture
06-26 18:36	10m	- / -	R6TA	+3 / -	3	Partial capture
06-26 18:35	10m	- / -	RL3K	-12 / -	2	Partial capture
06-26 18:34	10m	- / -	RW6HP	-11 / -	2	Partial capture
06-26 18:32	10m	- / -14	YO4NF	-20 / -	2	Partial capture
06-26 18:28	10m	- / -	RV3YR	-16 / -	2	Partial capture
06-26 18:28	10m	- / -	RO5K	-12 / -	2	Partial capture
06-26 18:28	10m	- / -	RW6HP	-10 / -	4	Partial capture
06-26 18:25	10m	- / +2	DN9SR	-6 / -	8	Partial capture
06-26 18:23	10m	- / -	UA9QFF	-14 / -	2	✓ Closing fragment
06-24 19:08	80m	-5 / -	RA1QX	- / -8	3	✓ Closing fragment
06-24 19:05	80m	-8 / -	R4HLO	- / -	3	Partial capture
06-24 19:03	80m	+6 / -8	<...>	+12 / -4	3	Partial capture
06-24 18:47	80m	-4 / -13	4Z5AV	+2 / -11	6	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
174400  -7 1325  CQ R4RB LO55
174445  -7 2102  R4RB RD7O KN98
174500 -16 2102  RD7O R4RB -13
174515  -6 1325  R4RB RA3WPF KO81
174530 -11 2102  RD7O R4RB RR73
174615  -5 1325  R4RB RA3WPF KO81
174830 -16 1864  R4CEC R4RB RR73
175100  -8 2605  R2APC R4RB -17
175115 -19 2605  R4RB R2APC R+01 (x2)
175215  +5 1621  R4RB UC6D -15 (x2)
175400 -21 1959  R1QBQ R4RB R-11
175515  +0 1606  R4RB R6ZB -16
175730 -20 2035  UB4CLH R4RB R-14

160m

UTC    dB Audio  Message
171330 -23 1490  R4RB RA9YTI RR73
171500 -24 1642  R4RB R2ATY RR73
171530  +6 2589  R4RB OM3SX KN08 (x6)
172230 -15 1175  R4RB UG4L LO33 (x2)
172445 -18 1174  UG4L R4RB RR73
172500 -15 1173  R4RB UG4L 73
172530 -14 1334  R4RB R2DRE -10 (x2)
173530 -24 1952  RA6ATZ R4RB LO55

40m

UTC    dB Audio  Message
055030 -12  876  R4RB DD7EE R-15 (x2)
062415 -22 1656  R4RB SQ9KWY JN99
194930 -23 1912  R4DB R4RB 73
195415 -14 1501  R4RB UB6LDM R-11 (x2)

10m

UTC    dB Audio  Message
183715  +2  662  R4RB R6TA LN13 (x2)
183815 -15 1610  R4RB RW6HP LN14 (x4)
184245 -14 1094  R4RB CR7BRV -06
184445  -7 2283  R4RB YO4NF -10
185000 -18 2116  R4RB RO5K KO91
201715  -1 1777  R4RB EA8UP +04 (x2)
202030 -18 1972  R4RB R5KH RR73
202230  +0  431  R4RB R7RDE -12 (x3)

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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