UA3DUJ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO94

Receiver-side FT8 activity involving UA3DUJ, decoded by SO8OO in southeastern Poland. 89 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 7 UTC dates in the available aggregate history. Observed between 2026-09-02 and 2026-09-21.

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 89 FT8 messages attributed to UA3DUJ as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (51%), followed by 80 m (49%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -16 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-16 dB

Estimated median S/N

Bands

80m · 44 40m · 45

First attributed message: 2026-09-02
Last attributed message: 2026-09-21 16:35 UTC

Observed FT8 message patterns

Attributed sample: 89 messages
Active dates: 7 UTC dates
Estimated median S/N: -16 dB
Estimated 10th-90th percentile: -24 to -4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 47, moderate (-15 to -9 dB) 26, strong (≥ -8 dB) 16.

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 UA3DUJ in decoded directed-looking exchanges:

UA3GJM · European Russia ×2 EW4DX · Belarus G4SPE · England HG8LXL · Hungary R3KJF · European Russia R3PJ · European Russia R3WDW · European Russia R4PFY · European Russia R6DZR · European Russia R6ZB · European Russia R8CIS · Asiatic Russia RA3RDN · 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 UA3DUJ

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: KO94 · 36 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,273 km (approx.)
Last such locator decoded: 2026-09-21 16:35 UTC

Other locator fields attributed to this token: LO02 (9).

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	UA3DUJ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-21 17:10	80m	- / -	UA3FO	-1 / -	2	Partial capture
09-21 16:31	80m	-11 / -	RI1FJZ	- / -	8	Partial capture
09-21 08:55	40m	- / -3	RD3FY	-16 / -	2	✓ Closing fragment
09-21 08:52	40m	- / -	RD3FY	-16 / -	2	Partial capture
09-21 08:52	40m	- / -14	EW4DX	+6 / -	5	✓ Closing fragment
09-19 18:12	80m	-24 / -15	OH5KNL	+2 / -	3	✓ Closing observed
09-19 18:00	80m	-17 / -	MW7GQB	- / -	3	Partial capture
09-17 17:24	80m	-22 / -	R3GI	+1 / -4	2	✓ Closing observed
09-17 17:21	80m	-18 / -	R3PLA	-15 / -14	5	✓ Closing observed
09-17 17:15	80m	-19 / -17	5P1KZX	+1 / -	6	✓ Closing observed
09-17 16:30	80m	- / -9	R2DP	-5 / -	3	✓ Closing fragment
09-17 16:28	80m	-24 / 0	ES5RY	-10 / -	2	Partial capture
09-17 16:25	80m	-24 / -	4X1UF	- / -	3	Partial capture
09-16 17:26	80m	- / -19	RX6DA	-12 / -	2	✓ Closing fragment
09-16 17:21	80m	-22 / -5	R3YAR	+1 / -	4	✓ Closing observed
09-16 17:21	80m	-18 / -10	RA3LCW	-16 / -3	5	✓ Full exchange observed
09-16 17:20	80m	-16 / -	R6ML	- / -16	2	✓ Closing fragment
09-16 17:19	80m	-15 / -	R1AV	- / -10	2	✓ Closing fragment
09-16 17:18	80m	-16 / -	R3KLE	- / -9	2	✓ Closing fragment
09-16 17:17	80m	- / +3	R2WAF	-3 / -	2	✓ Closing fragment
09-16 17:15	80m	-19 / -11	YO4NT	-2 / -	3	✓ Closing observed
09-16 17:14	80m	-23 / -	R2DRE	- / -12	2	✓ Closing fragment
09-16 17:13	80m	-24 / -7	UA3ZQN	-9 / -	2	✓ Closing observed
09-16 17:11	80m	-21 / -	E70SZ	- / -	3	Partial capture
09-16 17:02	60m	- / -	PI4TX	-15 / -	3	Partial capture
09-16 14:48	40m	-22 / -16	R3PJ	-8 / -	3	✓ Closing observed
09-16 14:46	40m	-21 / -1	UA3GJM	-7 / -1	4	✓ Full exchange observed
09-16 14:44	40m	- / +5	R6ZB	-18 / -	2	✓ Closing fragment
09-16 14:44	40m	- / +3	RK4UZ	-7 / -	4	Partial capture
09-16 14:41	40m	- / -16	RA3RDN	+2 / -	4	✓ Closing fragment
09-16 14:40	40m	- / -11	UB4CGR	-15 / -	2	✓ Closing fragment
09-15 18:15	80m	- / -16	EW8CW	-2 / -	3	✓ Closing fragment
09-15 18:12	80m	- / -11	R3DMS	-5 / -	4	✓ Closing fragment
09-15 18:09	80m	- / -20	R5DT	+14 / -	2	✓ Closing fragment
09-15 18:08	80m	- / -9	RC2Y	+2 / -	3	✓ Closing fragment
09-15 18:06	80m	- / -10	R2HD	0 / -	2	✓ Closing fragment
09-15 18:04	80m	- / -16	DK2CC	+11 / -	3	✓ Closing fragment
09-15 18:04	80m	-16 / -21	DK7ZT	0 / -	5	✓ Closing observed
09-15 17:57	80m	- / -7	UA3GJM	-1 / -	3	✓ Closing fragment
09-15 16:23	40m	- / 0	R4PFY	-12 / -	2	✓ Closing fragment
09-15 16:15	40m	-10 / -1	R6DZR	+1 / -	5	✓ Closing observed
09-15 16:03	40m	-15 / -	SP100PKP	- / -20	5	Partial capture
09-15 15:44	40m	-14 / -7	HG8LXL	-7 / -	4	✓ Closing observed
09-15 15:43	40m	-18 / -3	RK4FD	-5 / -	4	✓ Closing observed
09-15 15:42	40m	-21 / +7	R3WDW	0 / +4	4	✓ Full exchange observed
09-15 15:38	40m	- / -3	R3KJF	+2 / -	3	✓ Closing fragment
09-14 17:37	40m	-4 / -6	UB6OAJ	0 / -3	4	✓ Full exchange observed
09-14 17:34	40m	-6 / -	G4RCV	- / -	2	Partial capture
09-14 17:20	40m	- / -19	R9OOF	+6 / -	3	Partial capture
09-14 17:18	40m	- / -9	RU4I	+8 / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
181315  -2  619  UA3DUJ RY3F -10
181345 -12  763  UA3DUJ UA4HJ -15
181845 -15  373  UA3DUJ TA3GO RR73
181915  -7 2906  UA3DUJ RO3ZR KO80
163130  -6  668  RI1FJZ UA3DUJ KO94 (x8)
171000  -1 1993  UA3DUJ UA3FO KO94 (x2)
171030 +11 1474  UA3DUJ EV1R -02

40m

UTC    dB Audio  Message
144900  -9 1068  UA3DUJ R3PJ 73
144900 -18 1388  UA3DUJ R2HB KO85
145000  +0 2005  UA3DUJ 9A4ZM R-10
145230  +6 2599  UA3DUJ RY3D KO95
084830  -9  425  UA3DUJ RK3DJW KO85
085100 -11 2492  UA3DUJ RL6MT LN08
085200  +2  950  UA3DUJ EW4DX KO23
085230 -16 2263  UA3DUJ RD3FY KO85
085230 +10  950  UA3DUJ EW4DX KO23
085300 -15 2263  UA3DUJ RD3FY KO85
085300  +7  950  UA3DUJ EW4DX KO23 (x3)
085530 -12 2263  UA3DUJ RD3FY R-03 (x2)

60m

UTC    dB Audio  Message
170230 -14 2279  UA3DUJ PI4TX 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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