R4CR — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LO31

Receiver-side FT8 activity involving R4CR, decoded by SO8OO in southeastern Poland. 478 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 31 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-02.

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 478 FT8 messages attributed to R4CR as the transmitting token by decoded message structure across 31 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (67%), followed by 40 m (23%) and 20 m (9%). Most decodes (51%) fell within the six-hour window 06:00-12:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.

Overview

478

Messages attributed

UTC dates decoded

Active 15-min windows

-13 dB

Estimated median S/N

Bands

80m · 3 40m · 112 20m · 44 10m · 319

First attributed message: 2026-06-06
Last attributed message: 2026-10-02 19:12 UTC

Observed FT8 message patterns

Attributed sample: 478 messages
Active dates: 31 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -20 to -4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 167, moderate (-15 to -9 dB) 190, strong (≥ -8 dB) 121.

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 R4CR in decoded directed-looking exchanges:

RU3U · European Russia DL7ET · Fed. Rep. of Germany ON4ASV · Belgium R3DMS · European Russia R4HNW · European Russia R4SCB · European Russia R5GG · European Russia R70SAB · European Russia R7IA · European Russia R7NK · European Russia R8CKD · Asiatic Russia RA3PDL · 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 R4CR

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: LO31 · 200 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,774 km (approx.)
Last such locator decoded: 2026-09-29 16:54 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	R4CR S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-02 17:25	40m	-18 / -	RU9BM	- / -	2	Partial capture
10-02 17:17	40m	-16 / -	RU3NHP	- / +4	3	✓ Closing fragment
09-29 16:54	40m	-18 / -	UA9OBN	- / 0	2	✓ Closing fragment
09-29 16:54	40m	- / -	F6BHK	-11 / -	3	Partial capture
09-29 16:54	40m	- / -	DG5LP	-2 / -	2	Partial capture
09-29 03:43	40m	-16 / -11	R7NK	-6 / -6	4	✓ Full exchange observed
09-26 18:59	40m	- / -	RL6C	-18 / -	3	Partial capture
09-26 18:53	40m	- / -10	R70SAB	+6 / -	2	✓ Closing fragment
09-25 14:25	40m	- / +3	UA3IDQ	-22 / -	2	✓ Closing fragment
09-24 19:38	40m	- / -5	R3DMS	-10 / -	2	✓ Closing fragment
09-21 02:23	40m	-8 / -	OA4ENG	- / -11	2	Partial capture
09-16 23:46	80m	-12 / -	DL/AD2LX	- / -18	2	Partial capture
09-06 20:24	40m	-4 / -	UA0LOQ	-18 / -7	3	✓ Closing observed
09-06 20:24	40m	- / -9	UA3SCU	+1 / -	3	Partial capture
09-06 20:17	40m	-8 / -16	DL7ET	-3 / -13	8	✓ Full exchange observed
09-06 20:16	40m	- / -	DM2BM	+2 / -	2	Partial capture
09-06 20:13	40m	-8 / +9	R8CKD	-4 / -	4	✓ Full exchange observed
09-06 20:11	40m	-11 / -3	RK3YWA	-11 / +3	4	✓ Full exchange observed
09-05 17:37	40m	-11 / 0	UF1A	-6 / +3	4	✓ Full exchange observed
09-04 17:34	40m	- / -7	RA9SJG	-8 / -	2	✓ Closing fragment
08-23 16:41	40m	-12 / -10	ON4ASV	+4 / -11	7	✓ Full exchange observed
08-23 16:39	40m	-12 / -	UA3LNA	- / -17	3	✓ Closing fragment
08-23 16:38	40m	- / -	ON4ASV	+3 / -	3	Partial capture
08-23 16:33	40m	-13 / -3	RA3ZGT	+13 / +6	4	✓ Full exchange observed
08-23 16:30	40m	- / -9	DK6WS	-12 / -	3	Partial capture
08-23 16:30	40m	-11 / +1	UA3VVA	-4 / -	3	✓ Closing observed
08-23 16:27	40m	-12 / -	UN0PA	- / -2	2	✓ Closing fragment
08-23 16:21	40m	-15 / -5	UC6D	0 / -	4	✓ Full exchange observed
08-23 16:18	40m	-14 / -7	UA3WG	-8 / -7	5	✓ Full exchange observed
08-23 16:16	40m	-12 / -2	RX3DQX	-6 / -	5	✓ Full exchange observed
08-23 16:11	40m	-16 / -	R5GG	- / -	2	✓ Closing fragment
08-23 15:58	40m	-19 / -	UB4HVA	- / -	4	✓ Closing fragment
08-23 15:57	40m	- / -	R6HD	-6 / -	2	Partial capture
08-23 15:56	40m	-19 / +10	R4HNW	-13 / -	4	✓ Full exchange observed
08-23 15:54	40m	-19 / -	RA3PDL	-4 / +8	2	✓ Closing observed
08-23 11:58	20m	-12 / -	UB1ATR	- / -	2	Partial capture
08-15 15:05	20m	-16 / -	RI0FA	- / -10	4	Partial capture
08-15 14:35	20m	-18 / -	RI0FA	- / -11	2	Partial capture
07-31 15:36	20m	-14 / -	<...>	- / 0	2	Partial capture
07-26 13:08	20m	-12 / -	9M8DEN	- / -12	2	Partial capture
07-26 12:01	20m	-16 / -	RU3U	- / -12	2	✓ Closing fragment
07-23 19:10	20m	-16 / -	<...>	- / -13	2	Partial capture
07-22 16:23	10m	-16 / -	OA4YX	- / -18	2	Partial capture
07-19 17:15	20m	-5 / -	3W9A	- / -11	2	Partial capture
07-11 18:01	40m	-14 / -	R4SCB	-16 / -3	3	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
165345 -11 1939  CQ R4CR LO31
165400  -1 1605  R4CR DG5LP JN48
165415 -20 1939  CQ R4CR LO31
165430  -6 2899  R4CR F6BHK JN24
165430  -4 1605  R4CR DG5LP JN48
165445 -18 1939  UA9OBN R4CR +00
165500 -18 1939  R4CR F6BHK JN24
165515 -18 1939  UA9OBN R4CR RR73
165530  -9 1939  R4CR F6BHK JN24
171745 -15 2147  RU3NHP R4CR +04 (x3)
172515 -17 2120  RU9BM R4CR +16 (x2)
191230 -13 2219  UA0WF R4CR RR73

80m

UTC    dB Audio  Message
173115  -1 2653  R4CR R1943OD -05
234645  -9 1813  DL/AD2LX R4CR LO31
234700  -3  304  R4CR TK/4O7CC -12
234715 -16 1813  DL/AD2LX R4CR R-18
235015 -14 2338  EX7DY R4CR LO31

20m

UTC    dB Audio  Message
120100 -14 2077  RU3U R4CR -12 (x2)
130800 -12 2068  9M8DEN R4CR -12 (x2)
153600 -14 1439  <...> R4CR +00 (x2)
143545 -22 2099  RI0FA R4CR -11 (x6)
141315 -21 1317  RW3C/P R4CR +12
115830 -12 1615  UB1ATR R4CR LO31 (x2)

10m

UTC    dB Audio  Message
162315 -17 2093  OA4YX R4CR -18 (x2)

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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