RU3DK — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO95

Receiver-side FT8 activity involving RU3DK, decoded by SO8OO in southeastern Poland. 354 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 22 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-09-16.

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 354 FT8 messages attributed to RU3DK as the transmitting token by decoded message structure across 22 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (33%), followed by 160 m (30%) and 10 m (15%). Most decodes (81%) fell within the six-hour window 19:00-01:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (77%); the estimated median was -2 dB.

Overview

354

Messages attributed

UTC dates decoded

Active 15-min windows

-2 dB

Estimated median S/N

Bands

160m · 107 80m · 117 40m · 39 20m · 38 10m · 53

First attributed message: 2026-06-09
Last attributed message: 2026-09-16 22:18 UTC

Observed FT8 message patterns

Attributed sample: 354 messages
Active dates: 22 UTC dates
Estimated median S/N: -2 dB
Estimated 10th-90th percentile: -14 to +8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 22, moderate (-15 to -9 dB) 60, strong (≥ -8 dB) 272.

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 RU3DK in decoded directed-looking exchanges:

HA7TM · Hungary ×2 DA6OF · Fed. Rep. of Germany DN9CHV · Fed. Rep. of Germany R6MO · European Russia R8CC · Asiatic Russia RU3AMO · European Russia RV3QI · European Russia RV6HE · European Russia RW6AU · European Russia RW6HDK · European Russia RX9WN · Asiatic Russia RZ6L · 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 RU3DK

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: KO95 · 129 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,309 km (approx.)
Last such locator decoded: 2026-09-16 22:14 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	RU3DK S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-16 22:16	40m	-8 / -	DK8HC	- / -10	2	✓ Closing fragment
09-13 22:07	160m	-8 / -	R3DJV	- / +4	2	✓ Closing fragment
09-13 22:01	160m	-7 / -	9A5E	- / -	11	Partial capture
09-08 21:54	80m	+2 / -	R3DLK	- / -13	3	✓ Closing fragment
09-08 21:48	80m	+6 / +1	RA9ACA	-7 / -	3	✓ Closing observed
09-08 21:46	80m	+10 / -1	R7ZY	0 / +2	5	✓ Full exchange observed
09-08 21:13	160m	-7 / -	UN8DSW	- / -13	4	Partial capture
09-07 21:36	160m	-1 / +4	RA3WY	+4 / +9	9	✓ Full exchange observed
09-07 21:06	160m	-3 / -	RY6O	- / -	12	Partial capture
09-07 21:01	160m	-8 / -11	RT6O	-4 / +8	4	✓ Full exchange observed
09-06 22:01	80m	+6 / -	R2BPS	- / -	5	Partial capture
09-06 21:49	80m	0 / -8	RT6Z	+2 / +1	3	✓ Full exchange observed
09-06 21:37	80m	+4 / -12	R3PJV	+2 / -	4	✓ Full exchange observed
09-06 21:33	80m	+4 / -	UA3ATQ	-5 / +1	4	✓ Closing observed
09-06 21:08	80m	+2 / -	RL2A	- / -	4	Partial capture
09-06 21:05	80m	+4 / +5	R3VA	-4 / -	4	✓ Closing observed
09-06 21:05	80m	+8 / -	R3DNB	- / -8	2	✓ Closing fragment
09-06 20:45	80m	+1 / -	UA4POO	-9 / +3	2	✓ Closing observed
09-06 20:44	80m	+2 / +10	RA3WPF	-3 / +5	4	✓ Full exchange observed
09-05 23:13	160m	+3 / -	RA9YTI	- / -	4	Partial capture
09-05 23:12	160m	+4 / -9	F4HDR	-8 / -19	6	✓ Full exchange observed
09-05 23:03	160m	-3 / -	RA9YTI	- / -15	11	Partial capture
09-05 23:00	160m	+8 / -	SV8JE	- / -	4	Partial capture
09-05 22:58	160m	+1 / -7	PA3FR	+2 / -18	4	✓ Full exchange observed
09-05 22:30	160m	- / -	9A2RD	+2 / -	3	Partial capture
09-05 22:29	160m	-5 / -7	HA7TM	+12 / -14	5	✓ Full exchange observed
09-05 22:27	160m	-13 / +2	R3OZ	-4 / -	4	✓ Full exchange observed
09-05 21:58	160m	-10 / -	LA4O	- / -17	12	Partial capture
09-05 21:49	160m	-9 / -	8S2A	- / -5	3	✓ Closing fragment
09-05 21:48	160m	-14 / 0	R3ICU	-16 / -14	4	✓ Full exchange observed
09-05 21:35	160m	-10 / -15	OK1DXR	+7 / -20	12	✓ Full exchange observed
09-05 21:31	160m	-12 / -	LA5LDX/P	- / -19	6	✓ Closing fragment
09-05 21:29	160m	-5 / -3	LA1QRO	-6 / -	3	✓ Closing observed
09-05 21:25	160m	- / -	RV6ANA	-13 / -	5	Partial capture
09-05 21:23	160m	-16 / +5	RU3XK	-8 / +7	5	✓ Full exchange observed
08-30 10:59	20m	-10 / -	SA3SHN	- / -20	2	Partial capture
08-30 10:24	20m	-10 / -	RA0SCZ	- / -14	2	Partial capture
08-28 22:12	80m	0 / -	UD6F	- / -6	2	Partial capture
08-28 22:07	80m	0 / -	VK6JX	- / -	5	Partial capture
08-28 22:00	80m	+6 / -	M0LTA	- / -17	2	Partial capture
08-22 08:49	20m	- / -	OM3PC	+10 / -	3	Partial capture
08-21 22:29	20m	-18 / -	K0BFG	- / -11	8	Partial capture
08-21 22:26	20m	-10 / -14	RD1A	-4 / -13	3	✓ Full exchange observed
08-21 22:24	20m	-8 / -6	9Y4C	-13 / -8	6	✓ Full exchange observed
08-12 19:05	10m	- / -13	DA6OF	0 / -	2	✓ Closing fragment
08-12 18:42	10m	- / -8	DN9CHV	-12 / -	5	✓ Closing fragment
08-08 23:24	80m	+2 / +2	CR5VP	-21 / -16	7	Partial capture
08-08 23:21	80m	+4 / +9	OH0ERF	-20 / -18	6	✓ Full exchange observed
08-08 23:19	80m	+5 / -	RM5F	-10 / -8	2	Partial capture
08-08 23:17	80m	-2 / -11	UK8FCM	-20 / -	4	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
233615 -15 2418  RU3DK RX7T R+00
233630  -9 2417  RX7T RU3DK RR73
001445 -12  843  R6LPF RU3DK +09
001600 -16  843  RU3DK R6LPF R+05
001615 -13  843  R6LPF RU3DK RR73
194730 -19 1236  R2GBF RU3DK R-11
194815 -14 1644  RU3DK YU1EU -09 (x2)
225430 -14  918  RU3DK CN8NS -04
225530 -12  918  RU3DK RR73; PD0DNA <...> -14
221215  -4  537  UB3ATT RU3DK KO95
221415  -3  696  KP4QVQ RU3DK KO95
221615  -9  696  DK8HC RU3DK -10 (x2)
221845  -5  536  RA0WBI RU3DK R-14

160m

UTC    dB Audio  Message
211445  -7  972  UN8DSW RU3DK -13 (x2)
220130 -12 2127  9A5E RU3DK KO95 (x11)
220700  -8 2127  R3DJV RU3DK +04 (x2)

80m

UTC    dB Audio  Message
220200  +0 2008  R2BPS RU3DK KO95 (x3)
214530 +11  979  R5FY RU3DK KO95
214630 +12  979  R7ZY RU3DK KO95
214645  -1 2441  RU3DK R7ZY -01
214700 +10  979  R7ZY RU3DK R+02
214715  +2 2441  RU3DK R7ZY RR73
214730  +9 2441  R7ZY RU3DK 73
214815  -9 1556  RU3DK RA9ACA +01 (x2)
214900  +6 1556  RA9ACA RU3DK 73
215400  -4 1556  R3DLK RU3DK KO95 (x3)

20m

UTC    dB Audio  Message
222915 -17 1443  K0BFG RU3DK -11 (x8)
084930 +12 2876  RU3DK OM3PC JN98 (x3)
102445  -9 2532  RA0SCZ RU3DK -14 (x2)
105915 -11 2532  SA3SHN RU3DK KO95 (x2)

10m

UTC    dB Audio  Message
165200  +9  483  RU3DK RV3QI -05 (x2)
165330  +5  482  RU3DK RL3K -11 (x3)
165845 -15 2554  UA6JQ RU3DK 73
193330 -16 1097  RU3DK RW4M +04
183900 -16 2466  RU3DK DN9CHV -08 (x6)
190500  +0 1619  RU3DK DA6OF -13 (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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