RU3XX — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO84

Receiver-side FT8 activity involving RU3XX, decoded by SO8OO in southeastern Poland. 187 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-12 and 2026-08-30.

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 187 FT8 messages attributed to RU3XX as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (32%), followed by 40 m (27%) and 20 m (24%). Most decodes (90%) fell within the six-hour window 15:00-21:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

187

Messages attributed

UTC dates decoded

Active 15-min windows

-11 dB

Estimated median S/N

Bands

160m · 31 80m · 59 40m · 51 20m · 45 10m · 1

First attributed message: 2026-06-12
Last attributed message: 2026-08-30 15:53 UTC

Observed FT8 message patterns

Attributed sample: 187 messages
Active dates: 9 UTC dates
Estimated median S/N: -11 dB
Estimated 10th-90th percentile: -19 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 36, moderate (-15 to -9 dB) 89, strong (≥ -8 dB) 62.

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 RU3XX in decoded directed-looking exchanges:

R2DYC · European Russia ×2 IU3VXN · Italy R3AT · European Russia R3MDR · European Russia R5AV · European Russia R7NO · European Russia RA3LCI · European Russia RA4Y · European Russia RC1TF · European Russia RM5F · European Russia RY3K · European Russia UA3FH · 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 RU3XX

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: KO84 · 6 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,150 km (approx.)
Last such locator decoded: 2026-08-09 19:34 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	RU3XX S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-30 13:38	40m	-12 / +2	UA3XFO	-20 / +8	4	✓ Full exchange observed
08-27 19:33	160m	-14 / +9	RA4Y	-13 / -1	4	✓ Full exchange observed
08-27 19:15	40m	0 / -	RZ5D	-7 / -	2	✓ Closing observed
08-27 19:14	40m	-11 / -6	EW8DG	-9 / -10	3	✓ Full exchange observed
08-27 19:09	40m	-1 / -	EA9AA	- / -16	2	Partial capture
08-27 18:41	40m	-8 / -	RX3VF	- / -5	2	✓ Closing fragment
08-27 18:38	40m	-10 / -13	UK8OM	0 / -2	7	✓ Full exchange observed
08-25 17:51	160m	-18 / +1	RC1TF	-14 / -11	4	✓ Full exchange observed
08-25 17:49	160m	-18 / -	<...>	- / 0	2	Partial capture
08-25 17:46	80m	-15 / -1	RD6OX	+4 / -10	4	✓ Full exchange observed
08-25 17:43	80m	-10 / -3	OK1FRG	+13 / -15	5	✓ Full exchange observed
08-25 17:42	80m	-12 / +2	R7LB	-6 / -1	5	✓ Full exchange observed
08-25 17:40	80m	-14 / -11	RA6YDX	-4 / -13	4	✓ Full exchange observed
08-25 17:37	80m	-9 / -	UA3IDQ	- / -20	4	✓ Closing fragment
08-25 17:33	80m	-6 / -7	R6ML	-9 / -8	5	✓ Full exchange observed
08-25 17:32	80m	- / -10	R4HHN	-13 / -	2	Partial capture
08-25 17:31	80m	- / -7	UA3ZQN	0 / -	3	✓ Closing fragment
08-25 17:30	80m	-1 / -10	RN6AK	+2 / -	2	✓ Closing observed
08-25 15:40	40m	- / -11	F4FSY	-24 / -	2	Partial capture
08-25 15:39	40m	-6 / -	UN0PA	- / -5	2	✓ Closing fragment
08-25 15:37	40m	-10 / -	ZL1RPC/P	- / -21	2	Partial capture
08-25 15:36	40m	-12 / -1	LZ2SPD	-6 / -4	5	✓ Full exchange observed
08-25 15:33	40m	-12 / +1	RU5X	-4 / +4	4	✓ Full exchange observed
08-25 15:31	40m	-9 / +2	RC5Z	-6 / -	3	✓ Closing observed
08-12 19:15	80m	-9 / -3	R2FEA	+11 / -6	5	✓ Full exchange observed
08-12 19:13	80m	-13 / -	LX1NO	- / -16	3	Partial capture
08-12 17:55	20m	-9 / -	R6DJR	- / -9	2	✓ Closing fragment
08-12 17:53	20m	-9 / -	BU2FW	- / -21	2	✓ Closing fragment
08-12 17:52	20m	-12 / -	BI4XDT	- / -8	2	Partial capture
08-12 17:51	20m	-15 / -	F5IXN	- / -18	2	✓ Closing fragment
08-12 17:49	20m	-9 / -11	R7GA	-8 / -11	3	✓ Full exchange observed
08-12 17:48	20m	-6 / -8	D2ACE	-6 / -7	4	✓ Full exchange observed
08-12 17:43	20m	-13 / -	RD0L	- / -16	2	✓ Closing fragment
08-12 17:39	20m	-10 / -	9J2FI	- / -14	6	Partial capture
08-09 19:37	160m	-18 / -	OH0ERF	- / -18	4	Partial capture
08-09 19:33	160m	-15 / +1	RY3K	+14 / -1	4	✓ Full exchange observed
08-09 19:25	160m	-16 / -	R3MDR	- / -15	2	✓ Closing fragment
08-09 19:23	80m	-7 / -10	RL2F	0 / -16	5	✓ Full exchange observed
08-09 19:22	80m	-9 / -	R2DYC	+1 / -20	3	✓ Closing observed
08-09 19:21	80m	-8 / -	RQ3D	- / -12	2	✓ Closing fragment
08-09 19:18	80m	-10 / -	RL2Y	- / +1	4	Partial capture
08-09 19:10	40m	-22 / -	YM7KK	- / -12	2	Partial capture
08-09 19:06	40m	-19 / -3	UA2FBW	-1 / -	2	✓ Closing observed
08-09 19:04	40m	-22 / -	UB6OFG	-20 / -	3	✓ Closing observed
08-09 19:03	40m	-20 / -	LA6OCA	-15 / -	2	✓ Closing observed
08-09 19:00	40m	-18 / -	R2DYC	- / -1	2	✓ Closing fragment
08-09 18:52	20m	-8 / -	D2ACE	- / -11	2	Partial capture
08-09 18:50	20m	-12 / -	TT1GD	- / -16	2	Partial capture
08-09 18:48	20m	-14 / -	D2ACE	- / -7	3	Partial capture
07-14 19:37	160m	-14 / +4	RM5F	-17 / +1	4	✓ 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
190915  +0  904  EA9AA RU3XX -16 (x3)
191445 -11 2289  EW8DG RU3XX -10
191500  -7  430  RU3XX RZ5D KN75
191500  -8 1307  RU3XX EW8DG R-06 (x2)
191615  +0 2288  RZ5D RU3XX RR73
193930  -6 1403  JH5LCN RU3XX -13 (x2)
133815 -10 1411  UA3XFO RU3XX +08
133830 -20 1989  RU3XX UA3XFO R+02
133845 -13 1411  UA3XFO RU3XX RR73
133900 -21 1988  RU3XX UA3XFO 73
155300  -9 1672  UA6XDA RU3XX -16

20m

UTC    dB Audio  Message
174930  -9 2370  R7GA RU3XX -11
174945  -8 2370  RU3XX R7GA R-11 (x2)
175100 -19 2369  F5IXN RU3XX -18 (x2)
175230 -16 2370  BI4XDT RU3XX -08 (x2)
175330  -9 2369  BU2FW RU3XX -21 (x2)
175430 -12 2368  YO9CX RU3XX R-16
175500 -11 2368  R6DJR RU3XX R-09 (x2)
175700 -12 2367  N1API RU3XX RR73
175900 -10 2367  A71DA RU3XX -11
132130  +1  481  RU3XX RR73; EB5FKD <...> -08

160m

UTC    dB Audio  Message
193815 -19 1500  OH0ERF RU3XX -18 (x3)
194015 -19 1544  DB100FT RU3XX -19
174915 -22 1533  <...> RU3XX +00 (x2)
175000  -1 1082  RU3XX RR73; SP9UPH <...> -16
175130 -21 1430  RC1TF RU3XX -11
175215 -14 1430  RU3XX RC1TF R+01
175230 -15 1430  RC1TF RU3XX RR73
175245 -13 1429  RU3XX RC1TF 73
193330 -16 1181  RA4Y RU3XX -01
193515 -15 1802  RU3XX RA4Y R+09
193530 -11 1230  RA4Y RU3XX RR73
193545 -11 1802  RU3XX RA4Y 73

80m

UTC    dB Audio  Message
174100  -5 2171  RU3XX RA6YDX 73
174230 -11 1523  R7LB RU3XX -01 (x2)
174315  -5 1912  RU3XX R7LB R+02
174330 -10 1523  R7LB RU3XX RR73
174345  -8 1912  RU3XX R7LB 73
174345 +11 2524  RU3XX OK1FRG JN79
174400  -8 1522  OK1FRG RU3XX -15
174415 +16 2524  RU3XX OK1FRG R-03
174430 -11 1522  OK1FRG RU3XX RR73
174445 +13 2524  RU3XX OK1FRG 73
174615 -18 1522  RD6OX RU3XX -10
174630  +4 1820  RU3XX RD6OX R-01
174645 -12 1522  RD6OX RU3XX RR73
174700  +5 1820  RU3XX RD6OX 73

10m

UTC    dB Audio  Message
160800 -13 2603  RU3XX IQ4JO JN63
160900 -24 1612  RU3XX RW6HP R+03
161645  +0 2555  RU3XX PD0HLA -17 (x4)
161830 -13 1052  RU3XX DN9AD JO52
101630  -6 2837  RU3XX R6TA LN13 (x3)
102600  -6 1193  RU3XX IU3VXN R+00 (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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