RU3DNN — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO96

Receiver-side FT8 activity involving RU3DNN, decoded by SO8OO in southeastern Poland. 2,670 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 83 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-23.

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 2,670 FT8 messages attributed to RU3DNN as the transmitting token by decoded message structure across 83 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (34%), followed by 40 m (29%) and 160 m (15%). Most decodes (67%) fell within the six-hour window 16:00-22:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (69%); the estimated median was -2 dB.

Overview

2,670

Messages attributed

UTC dates decoded

397

Active 15-min windows

-2 dB

Estimated median S/N

Bands

160m · 393 80m · 914 40m · 762 20m · 383 10m · 218

First attributed message: 2026-06-06
Last attributed message: 2026-09-23 16:15 UTC

Observed FT8 message patterns

Attributed sample: 2,670 messages
Active dates: 83 UTC dates
Estimated median S/N: -2 dB
Estimated 10th-90th percentile: -16.7 to +9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 320, moderate (-15 to -9 dB) 512, strong (≥ -8 dB) 1,838.

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 RU3DNN in decoded directed-looking exchanges:

R3GO · European Russia ×3 RI0SP · European Russia ×3 UA6XY · European Russia ×2 EI5JL · Ireland ×2 OH0ERF · Aland Islands ×2 R4FDD · European Russia ×2 RA3QUA · European Russia ×2 RA3VMK/P · European Russia ×2 RA7Z · European Russia ×2 RD2T · European Russia ×2 UB3BAE/P · European Russia ×2 EI3GRB · Ireland ×2

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 RU3DNN

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: KO96 · 1,606 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,353 km (approx.)
Last such locator decoded: 2026-09-23 16:15 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	RU3DNN S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-23 16:11	40m	-8 / -	RI1FJZ	- / -	7	Partial capture
09-23 16:00	40m	-8 / -	RZ9OL/M	- / -21	3	Partial capture
09-23 15:56	40m	-7 / -	R4RJ	- / -	2	Partial capture
09-23 15:53	40m	-6 / -	PE1OKJ	- / -	2	Partial capture
09-23 15:49	40m	-6 / -	LZ1GC	+4 / +4	4	✓ Full exchange observed
09-23 15:46	40m	-2 / -9	EI6JMB	-7 / -12	6	✓ Full exchange observed
09-23 15:41	40m	+1 / -	R8LCM/M	- / -13	2	Partial capture
09-23 15:33	40m	-4 / -	R6DZD	+1 / -11	3	✓ Closing observed
09-23 15:32	40m	-4 / -	R4CKC	-17 / -	2	✓ Closing observed
09-23 15:29	40m	-8 / -	R6DZD	- / -	2	Partial capture
09-23 15:28	40m	-2 / -	BD8FOD	- / -	2	Partial capture
09-23 15:26	40m	-5 / -	RA0AY	- / -	3	Partial capture
09-23 15:23	40m	-8 / -	R4CKC	- / -	2	Partial capture
09-23 15:19	40m	-7 / -	BD8FOD	- / -	4	Partial capture
09-23 15:15	40m	0 / -	RW6ADP	- / -	2	Partial capture
09-23 15:13	40m	-5 / -	TM14LEO	- / -	2	Partial capture
09-23 14:59	40m	-7 / -	3Z100PKP	- / -	6	Partial capture
09-23 14:54	40m	+5 / -	RZ9OL/M	- / -	3	Partial capture
09-23 14:45	40m	-9 / -	RZ9OL/M	- / -	4	Partial capture
09-23 14:36	40m	-10 / -	R8PG/P	- / -11	4	✓ Closing fragment
09-22 17:06	40m	-5 / -	RI1FJZ	- / -	4	Partial capture
09-22 16:57	40m	-4 / -	RI1FJZ	- / -	10	Partial capture
09-22 15:46	40m	-8 / -8	RC6AO/P	-15 / -	3	✓ Closing observed
09-22 14:15	40m	-15 / -	R9FGJ	- / -16	6	✓ Closing fragment
09-22 14:09	40m	-12 / -15	HB9ELE	-3 / -22	5	✓ Full exchange observed
09-22 13:57	40m	-12 / -	R3NAW	- / -14	2	✓ Closing fragment
09-22 13:45	40m	- / -12	R6GY	-13 / -	3	✓ Closing fragment
09-22 13:43	40m	-7 / -	SP2YY	- / -	2	Partial capture
09-22 13:39	40m	-17 / -	R6GY	- / -	3	Partial capture
09-22 13:31	40m	-9 / -	OH1TSM	- / -	2	Partial capture
09-22 13:05	40m	-14 / -	R8CKV	- / -7	2	✓ Closing fragment
09-20 05:15	40m	-11 / -	RA4ADF/P	- / -24	7	Partial capture
09-20 05:09	40m	-10 / -13	F5MOO	+12 / -	3	✓ Closing observed
09-20 05:03	40m	-10 / -	RJ5Z	- / -9	3	✓ Closing fragment
09-20 05:01	40m	-12 / -	HK3YL	- / -	2	Partial capture
09-20 04:59	40m	-10 / -11	IK2VFR/P	-6 / -	4	✓ Closing observed
09-20 04:57	40m	-2 / -	HA5VQ	- / -6	3	✓ Closing fragment
09-20 04:55	40m	-4 / -	SM2ODB	- / -23	2	✓ Closing fragment
09-20 04:53	40m	-4 / -15	F5OAM	-6 / -12	5	✓ Full exchange observed
09-19 17:53	40m	-2 / -	R6OV	- / -21	4	Partial capture
09-18 21:05	40m	+2 / -	UA2CZ	- / -	4	Partial capture
09-18 21:01	40m	+5 / -	V51WH	- / -18	5	✓ Closing fragment
09-15 04:54	40m	-12 / -	D44TWO	- / -	2	Partial capture
09-14 19:19	80m	+3 / -	SK150LM	- / -21	2	Partial capture
09-14 19:17	80m	+8 / -	EK/RX3DPK	- / -21	4	Partial capture
09-14 17:53	160m	- / -	OK1VKX	-5 / -	3	Partial capture
09-14 17:51	160m	-11 / -4	RU3DBT	-23 / -8	3	✓ Full exchange observed
09-14 17:26	40m	0 / -	ON4CJU	-7 / -14	4	✓ Closing observed
09-12 19:36	160m	-11 / -	R70SAB	- / -	4	Partial capture
09-12 19:33	160m	-8 / -	R4SCB	- / -9	4	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
154945  -6 1097  LZ1GC RU3DNN 73
155300  -7 1084  PE1OKJ RU3DNN KO96 (x2)
155600  -6 1679  R4RJ RU3DNN KO96 (x2)
160030 -10 1690  RZ9OL/M RU3DNN KO96 (x3)
161115  -7 1310  RI1FJZ RU3DNN KO96 (x7)

80m

UTC    dB Audio  Message
184115  +5 2179  R3XBV RU3DNN R-12 (x2)
184215  +6  767  UB8COS RU3DNN KO96
184300 +13  767  UB2FDL RU3DNN KO96 (x5)
184615  +8 2527  V51WH RU3DNN KO96
191715 +10 2304  EK/RX3DPK RU3DNN -21 (x4)
191915  +2 2260  SK150LM RU3DNN -21 (x2)

160m

UTC    dB Audio  Message
193530  -7 2033  R4SCB RU3DNN 73
193645 -11 2033  R70SAB RU3DNN KO96 (x2)
193845 -14 2033  RT4A/P RU3DNN KO96
193915 -10 2033  R70SAB RU3DNN KO96
194015  -4 2033  <SO100PKP> RU3DNN R-04
194030 +12 1036  RU3DNN RR73; ON4KTJ <...> -08
194115 -12 2033  R70SAB RU3DNN KO96
175145 -13 1974  RU3DBT RU3DNN -08
175200 -23 1871  RU3DNN RU3DBT R-04
175215  -9 1974  RU3DBT RU3DNN RR73
175245 -14 1974  RA3RGQ RU3DNN -01
175300  -4 1975  RU3DNN OK1VKX JN69 (x3)

20m

UTC    dB Audio  Message
060215 -10 2444  UA3VVA RU3DNN KO96
050545  -2 1229  AA4DD RU3DNN KO96 (x3)
080600  -2 2614  RU3DNN R6DOB/M -10
050000 -17 1799  AK8A RU3DNN KO96
051300 -13 1910  VK2ZR RU3DNN R-10
051315 -11 2677  RU3DNN VK2ZR RR73
051330 -24 1909  VK2ZR RU3DNN 73
051345 -11 2676  RU3DNN VK2ZR -11
051430 -24 1909  UA3VVA RU3DNN KO96
051645  -5  583  RU3DNN UK8OM -02 (x2)
070630 +11 1119  RU3DNN RO6OP +03 (x2)

10m

UTC    dB Audio  Message
062315 -10 2370  RU3DNN R1WBJ RR73
063300 +16 2690  RU3DNN 9A5WA +00 (x2)
072045 -22 1249  R6OEY RU3DNN KO96
093415  -1  500  RU3DNN TK5K RR73
093730 -11 1796  RU3DNN CN2DX -15 (x2)
094945 -17 2473  <...> RU3DNN KO96 (x2)
135545  -6 2244  RU3DNN IV3IUM JN65 (x2)
064745 -16 1208  OK2UQF RU3DNN RR73
071315 -16  880  F1PBZ RU3DNN KO96
071400  -2 2641  RU3DNN F1PBZ -07 (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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