RU3FA — 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 RU3FA, decoded by SO8OO in southeastern Poland. 1,081 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 62 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-09.

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 1,081 FT8 messages attributed to RU3FA as the transmitting token by decoded message structure across 62 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (30%), followed by 160 m (25%) and 80 m (19%). Most decodes (65%) fell within the six-hour window 19:00-01:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

1,081

Messages attributed

UTC dates decoded

174

Active 15-min windows

-12 dB

Estimated median S/N

Bands

160m · 266 80m · 204 40m · 326 20m · 168 10m · 117

First attributed message: 2026-06-06
Last attributed message: 2026-09-09 21:23 UTC

Observed FT8 message patterns

Attributed sample: 1,081 messages
Active dates: 62 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -21 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 374, moderate (-15 to -9 dB) 321, strong (≥ -8 dB) 386.

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 RU3FA in decoded directed-looking exchanges:

ON4MAP · Belgium ×4 TA2ED · Asiatic Turkey ×3 F1PBZ · France ×3 UD8S · Asiatic Russia ×2 DO1OAS · Fed. Rep. of Germany ×2 IK4LZH · Italy ×2 RA6AR · European Russia ×2 DK5WL · Fed. Rep. of Germany RK6DV · European Russia IZ5YBN · Italy SQ2BXI · Poland BG0FQU · China

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 RU3FA

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 · 744 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,150 km (approx.)
Last such locator decoded: 2026-09-09 21:23 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	RU3FA S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-09 19:50	80m	-6 / -	R3PLA	- / -9	2	✓ Closing fragment
09-09 19:45	80m	- / -9	DL8UVG	+9 / -	3	Partial capture
09-09 19:44	80m	-14 / -	LB5WB	-1 / -6	3	✓ Closing observed
09-09 19:43	80m	- / -	OE9GWV	-19 / -	2	Partial capture
09-09 19:42	80m	- / -7	R7BI	+2 / -	3	✓ Closing fragment
09-07 23:48	80m	-9 / -7	F6AOJ	+2 / -8	5	✓ Full exchange observed
09-07 23:46	80m	-4 / -9	DO1OAS	-4 / -12	4	✓ Full exchange observed
09-04 22:13	40m	-4 / -	MM7WQD	- / -17	2	✓ Closing fragment
09-03 22:38	40m	-2 / -	JT1A	- / -7	2	✓ Closing fragment
09-03 22:36	40m	+1 / -11	UB3UAC	-13 / -14	8	✓ Full exchange observed
09-03 22:30	40m	0 / -	BD8ENX	- / -18	2	✓ Closing fragment
09-03 22:28	40m	+6 / -9	EA4D	-12 / -4	5	✓ Full exchange observed
09-03 22:25	40m	0 / -	BG0FQU	- / -14	5	✓ Closing fragment
09-03 22:23	40m	-2 / -	TA2ED	- / -17	2	✓ Closing fragment
09-03 22:23	40m	- / -	EA4D	-10 / -	4	Partial capture
09-03 22:18	160m	-12 / -	RI1FJL	- / -	2	Partial capture
09-03 21:49	160m	-10 / -	RI1FJL	- / -	2	Partial capture
08-30 00:41	160m	-22 / -20	9A2EU	+6 / -	3	✓ Closing observed
08-29 23:22	80m	- / -11	RZ6HBF	-2 / -	2	✓ Closing fragment
08-29 23:21	160m	- / -	SP2MEF	-8 / -	2	Partial capture
08-29 23:19	80m	- / -9	DM9EE	-1 / -	3	✓ Closing fragment
08-28 20:22	20m	-8 / +2	M7GYP	-6 / -14	4	✓ Full exchange observed
08-28 20:18	20m	-12 / -	IZ5YBN	- / -14	6	✓ Closing fragment
08-28 20:11	20m	- / -13	TA2ED	-12 / -	4	✓ Closing fragment
08-28 20:06	20m	-6 / -8	KB1WSR	-14 / -	3	✓ Closing observed
08-28 19:51	20m	-12 / -	VE3OP	- / -	4	Partial capture
08-28 19:11	20m	+1 / -	F4HSB	- / -16	2	✓ Closing fragment
08-28 19:04	20m	-1 / -	DJ5FS	- / -9	4	✓ Closing fragment
08-28 19:01	20m	-10 / -	W3LL	- / -9	3	Partial capture
08-28 04:02	40m	- / -1	IZ4AIF	0 / -	2	✓ Closing fragment
08-28 03:55	40m	-17 / -11	PV8AJ	-23 / -	3	Partial capture
08-27 06:20	20m	-2 / -	VK2JEH	- / -19	3	Partial capture
08-26 22:42	160m	-20 / -	PA3FR	- / -	2	Partial capture
08-26 22:40	40m	-3 / -3	DH1KJ	+11 / -2	5	✓ Full exchange observed
08-25 22:48	40m	-4 / -	DL4NWM	- / -2	2	✓ Closing fragment
08-25 22:18	20m	- / -14	BI4XDT	+9 / -	3	✓ Closing fragment
08-25 22:14	20m	- / -14	K1SM	-6 / -	2	✓ Closing fragment
08-24 21:56	40m	-1 / -	R0ADN	- / -10	2	Partial capture
08-24 21:56	40m	-6 / +5	EU6UE	-12 / +2	5	✓ Full exchange observed
08-23 17:42	160m	-6 / -	R2ATY	- / -7	2	✓ Closing fragment
08-23 03:10	40m	-10 / +1	KV1J	+2 / -15	5	✓ Full exchange observed
08-23 03:00	40m	-4 / -	KV1J	- / -10	2	Partial capture
08-23 00:41	40m	+1 / -	ON4MAP	- / -18	2	✓ Closing fragment
08-23 00:39	40m	+2 / -	W4GGJ	- / -18	4	✓ Closing fragment
08-23 00:35	40m	+2 / -	KR4DWD	- / -15	4	✓ Closing fragment
08-23 00:32	40m	+4 / -	K3ZK	- / -	3	Partial capture
08-23 00:30	40m	+5 / -	TA2ED	- / -9	2	✓ Closing fragment
08-22 22:03	40m	-2 / -	BG4OOO	- / -	2	Partial capture
08-22 22:02	40m	-2 / -	VK6BAD	- / -	2	Partial capture
08-22 22:00	40m	-6 / -	UA0SCF	- / -9	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
194345 -17 1560  RU3FA OE9GWV JN47
194400 -14 1658  LB5WB RU3FA R-06
194415  -1 1755  RU3FA LB5WB RR73
194430 -15 1658  LB5WB RU3FA 73
194545  +8 1658  RU3FA DL8UVG JO71 (x3)
194900 -13 1658  CQ RU3FA KO84 (x3)
195030  -7 1658  R3PLA RU3FA -09 (x2)
212030 -12 1658  CQ RU3FA KO84 (x2)
212330 -14 1620  EA8UP RU3FA KO84

40m

UTC    dB Audio  Message
223600 -16  938  RU3FA UB3UAC
223615  +8 1689  UB3UAC RU3FA -14
223630 -14  939  RU3FA UB3UAC
223645  -2 1689  UB3UAC RU3FA -14
223700 -12  938  RU3FA UB3UAC R-11
223715  -2 1689  UB3UAC RU3FA RR73
223730 -11  938  RU3FA UB3UAC R-11
223745  -1 1689  UB3UAC RU3FA RR73
223815  -1 1689  JT1A RU3FA -07 (x2)
221200  -5 1589  CQ RU3FA KO84 (x3)
221330  -3 1589  MM7WQD RU3FA -17 (x2)

160m

UTC    dB Audio  Message
214745 -14 1757  CQ RU3FA KO84 (x2)
214915  -9 1756  RI1FJL RU3FA KO84 (x2)
215715 -11 1755  CQ RU3FA KO84 (x4)
221130 -16 1511  RU3FA RA9YTI -04
221315 -10 1755  SV7BVM RU3FA KO84
221515  -9 1755  CQ RU3FA KO84 (x3)
221845 -12 1755  RI1FJL RU3FA KO84 (x2)

20m

UTC    dB Audio  Message
201245 -16 1797  RU3FA TA2ED RR73
201730 -13 1799  CQ RU3FA KO84
201800 -17 1799  IZ5YBN RU3FA -14 (x6)
202200 -10 1799  M7GYP RU3FA -14
202215  -6  728  RU3FA M7GYP R+02
202230  -5 1799  M7GYP RU3FA RR73
202245  -7  728  RU3FA M7GYP 73
202430  -6 1800  CQ RU3FA KO84 (x3)

10m

UTC    dB Audio  Message
101415 -16 1697  RU3FA PD1HPB 73
105215 -22 1782  RU3FA M7HET IO91
174600 -20 1852  SN4K RU3FA +04 (x2)
174700 -21 1848  CQ RU3FA KO84 (x5)
080215  -9 1655  YU7MA RU3FA -05 (x2)
125500 -14 1765  RU3FA LZ2CC -23
165530 -16 1470  RU3FA PD4DX JO33 (x2)
185145 -21 1797  CQ RU3FA KO84

60m

UTC    dB Audio  Message
224915  -5 1631  RU3FA PG7R JO22 (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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