RU5A — 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 RU5A, decoded by SO8OO in southeastern Poland. 1,158 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 29 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-17.

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 1,158 FT8 messages attributed to RU5A as the transmitting token by decoded message structure across 29 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (69%), followed by 20 m (25%) and 80 m (4%). Most decodes (74%) fell within the six-hour window 17:00-23:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -7 dB.

Overview

1,158

Messages attributed

UTC dates decoded

123

Active 15-min windows

-7 dB

Estimated median S/N

Bands

80m · 44 40m · 800 20m · 284 10m · 30

First attributed message: 2026-06-06
Last attributed message: 2026-10-17 21:54 UTC

Observed FT8 message patterns

Attributed sample: 1,158 messages
Active dates: 29 UTC dates
Estimated median S/N: -7 dB
Estimated 10th-90th percentile: -15 to +4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 109, moderate (-15 to -9 dB) 396, strong (≥ -8 dB) 653.

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 RU5A in decoded directed-looking exchanges:

TA7MMI · Asiatic Turkey ×2 RK4FD · European Russia 5Z4VJ · Kenya CT7AUT · Portugal DH1FA · Fed. Rep. of Germany DL8LRZ · Fed. Rep. of Germany NO6V · United States TA4SM · Asiatic Turkey UA4POO · European Russia W8BLA · United States 3Z4DX · Poland 4U1GSC · Italy

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 RU5A

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 · 684 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,193 km (approx.)
Last such locator decoded: 2026-10-17 21:52 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	RU5A S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-17 21:51	40m	-10 / -	BG1URZ	- / -14	7	Partial capture
10-17 21:45	40m	-7 / -	BD4WRP	- / -	4	Partial capture
10-17 21:43	40m	-8 / -	LZ2CC	- / +5	2	✓ Closing fragment
10-17 21:40	40m	-10 / -	EA1CUB	- / +1	4	✓ Closing fragment
10-17 21:34	40m	-11 / -	JF2WXS	- / -	3	Partial capture
10-17 21:32	40m	- / -5	GJ0KYZ	+1 / -	3	Partial capture
10-17 21:31	40m	-4 / -	IU4PPL	-18 / -24	3	✓ Full exchange observed
10-17 21:30	40m	-9 / -	PA1L	- / -	2	Partial capture
10-17 21:26	40m	-4 / 0	RN6HK	0 / +5	5	✓ Full exchange observed
10-17 21:23	40m	-8 / -	DK5NC	- / -14	4	✓ Closing fragment
10-17 21:21	40m	-10 / -5	RZ4FWA	-17 / -10	3	Partial capture
10-17 21:19	40m	-12 / -8	8Z1IT	-15 / -1	4	✓ Full exchange observed
10-17 21:17	40m	-10 / -	UB6LUR	- / -10	4	✓ Closing fragment
10-17 21:14	40m	-7 / -	TA2LE	- / +4	6	✓ Closing fragment
10-17 20:10	40m	-11 / -	S79VU	- / -21	2	✓ Closing fragment
10-17 20:07	40m	-11 / -	BG0KD	- / -	2	Partial capture
10-09 22:10	40m	-10 / -	IQ0AAX	- / -11	7	✓ Closing fragment
10-09 22:09	40m	-11 / 0	DD1UN	-10 / +5	5	✓ Full exchange observed
10-09 22:07	40m	-16 / -18	II5GG	-14 / -17	5	✓ Full exchange observed
10-09 22:06	40m	-10 / -	CT1AAA	- / -	3	Partial capture
10-09 22:04	40m	-16 / -	S79KW	- / -	2	Partial capture
10-09 22:02	40m	-14 / -9	YO3GJE	-23 / -9	3	Partial capture
10-09 21:58	40m	-12 / -	9A5MP	- / -	2	Partial capture
10-09 21:56	40m	-16 / -	ON8SL	- / -	2	Partial capture
10-09 21:54	40m	-11 / -	HB9IOA	- / -17	4	✓ Closing fragment
10-09 21:52	40m	-12 / -	4O/DL1FDH	- / -	3	Partial capture
10-09 21:49	40m	-10 / -	SV1TNK	- / -	5	Partial capture
10-09 21:46	40m	-11 / -9	RD3FY	-13 / -24	6	✓ Full exchange observed
10-09 21:44	40m	-11 / -	DF8RU	-11 / +9	4	✓ Full exchange observed
10-09 21:42	40m	-11 / -	Z34BET	- / -20	3	✓ Closing fragment
10-09 21:33	40m	-12 / -	4O/DL1FDH	- / -	12	Partial capture
10-03 21:47	40m	-16 / -	JH5HDA	- / -17	2	Partial capture
10-03 21:43	40m	-12 / -	TA9EN	- / -12	3	✓ Closing fragment
10-03 20:53	40m	+3 / -	DJ2DL/QRP	- / -	2	Partial capture
10-03 20:50	40m	+5 / 0	LB8TG	-18 / -6	8	✓ Full exchange observed
10-03 20:48	40m	+8 / -	JH1FNU	- / -15	2	✓ Closing fragment
10-03 20:29	40m	+2 / -	DJ2DL/QRP	- / +5	4	Partial capture
09-26 21:10	40m	-16 / -	EA8J	- / -12	5	Partial capture
09-26 21:07	40m	-16 / -	BA8BLK	- / -16	2	✓ Closing fragment
09-26 21:06	40m	-16 / -	EA5HM	- / -8	2	✓ Closing fragment
09-26 21:04	40m	-14 / -	UA3PTY	- / -15	3	✓ Closing fragment
09-26 21:02	40m	-17 / -	OZ3AAF	- / 0	3	✓ Closing fragment
09-26 21:00	40m	-16 / -	TA3JOH	- / 0	3	✓ Closing fragment
09-26 20:55	40m	-17 / -	DG3YEV	- / -2	7	✓ Closing fragment
09-26 20:53	40m	-17 / -	JJ2IJU	- / -10	2	✓ Closing fragment
09-26 20:51	40m	-19 / -	PD2NBE	- / -13	3	✓ Closing fragment
09-26 20:48	40m	-14 / -	OK2BRV	- / -8	3	✓ Closing fragment
09-26 20:46	40m	-20 / -	LZ1NDV	- / -8	3	✓ Closing fragment
09-26 20:43	40m	-15 / -4	HB9ELE	-4 / -9	5	✓ Full exchange observed
09-26 20:42	40m	-16 / -	DL7VGU	- / 0	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
214145  -8 2363  EA1CUB RU5A 73
214345  -4 2363  LZ2CC RU5A R+05 (x2)
214530 -13 2362  RU5A EB5FMC IM99
214545  -4 2363  BD4WRP RU5A KO85 (x4)
215100 -12 2363  BG1URZ RU5A KO85 (x7)

160m

UTC    dB Audio  Message
173645  +1  831  RU5A RK4FD 73
163400 -11 1594  RU5A R80SAA -21
163430 -11 1594  RU5A RR73; RA4HEV <...> -12

80m

UTC    dB Audio  Message
213800  -8  703  CQ RU5A KO85
213815 +14  802  RU5A DO5UH/P JO61
213830  -2  704  CQ RU5A KO85
213845  +2  808  RU5A DO5HOK JO41
213900 -15  704  CQ RU5A KO85 (x2)
213945  +3  808  RU5A DO5HOK JO41 (x2)
220400  -9  703  HB9EFK RU5A KO85 (x3)
220515  -2  210  RU5A HB9EFK -02
220530 -12  703  HB9EFK RU5A R-07
220545  -3  210  RU5A HB9EFK RR73
220600  -6  704  HB9EFK RU5A 73

20m

UTC    dB Audio  Message
223945 -22 1929  RU5A W8BLA EM84 (x3)
225945  -5  822  RU5A M7BUY -08
213315  -2  466  RU5A K2TQC -03
220500 -21 2098  RU5A BI4XDT PM01 (x2)
220600 -17 2020  RU5A G3ROY IO70 (x3)
220930 -16 2319  RU5A 5Z4VJ 73
221530  -6  796  RU5A UA4POO -10 (x2)
222830  -5 1771  RU5A CT7AUT -01 (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.

CW

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

Explore CW reception at SO8OO

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