UB3XCA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO85

Receiver-side FT8 activity involving UB3XCA, decoded by SO8OO in southeastern Poland. 85 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 12 UTC dates in the available aggregate history. Observed between 2026-06-14 and 2026-09-12.

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 85 FT8 messages attributed to UB3XCA as the transmitting token by decoded message structure across 12 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (91%), followed by 20 m (9%). Several six-hour UTC windows tied for the largest share (88%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

40m · 77 20m · 8

First attributed message: 2026-06-14
Last attributed message: 2026-09-12 17:25 UTC

Observed FT8 message patterns

Attributed sample: 85 messages
Active dates: 12 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -22 to -2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 21, moderate (-15 to -9 dB) 25, strong (≥ -8 dB) 39.

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 UB3XCA in decoded directed-looking exchanges:

IK4LZH · Italy RX4SA · European Russia UA1OJL · European Russia DL3KVR · Fed. Rep. of Germany EU6UE · Belarus EX7CQ · Kyrgyzstan OE6TNO · Austria ON4AOI · Belgium R2AL · European Russia R4DI · European Russia R4HHG · European Russia R4WQ · 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 UB3XCA

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: KO85 · 43 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,193 km (approx.)
Last such locator decoded: 2026-09-12 17:24 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	UB3XCA S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-15 17:01	40m	- / -	PD0RCQ	-10 / -	2	Partial capture
09-12 17:24	40m	0 / -	EU6UE	- / -16	3	✓ Closing fragment
09-12 17:21	40m	-2 / -4	PA3EWP	+2 / -	5	Partial capture
09-12 17:17	40m	-6 / -	UB6ZDJ	- / -5	2	✓ Closing fragment
09-12 17:12	40m	- / -	F6BHK	-13 / -	3	Partial capture
09-12 17:08	40m	- / +4	OE6TNO	-1 / -	5	✓ Closing fragment
09-12 17:06	40m	-6 / -	UA6EU	- / -8	2	✓ Closing fragment
09-12 17:01	40m	0 / -	UB6ZDJ	-7 / +9	4	Partial capture
09-12 16:57	40m	-6 / -	R4HHG	- / -19	2	✓ Closing fragment
09-11 16:30	40m	-7 / -4	EX7CQ	0 / +3	6	✓ Full exchange observed
09-11 16:25	40m	-6 / -16	ON4AOI	+20 / -9	4	✓ Full exchange observed
09-11 16:18	40m	-8 / -	RA4HG	- / -13	2	✓ Closing fragment
09-11 16:15	40m	-7 / -	R8OAE	- / -12	3	✓ Closing fragment
09-11 16:11	40m	-6 / -	R4DI	-5 / -5	2	✓ Closing observed
09-10 15:15	40m	- / -	LB5WB	-15 / -	3	Partial capture
09-10 15:13	40m	-16 / -	UN7EG	- / -6	3	✓ Closing fragment
09-10 15:06	40m	-17 / -	UB4HVI	- / -18	2	✓ Closing fragment
09-09 18:01	40m	0 / -	EI4JFB	- / -	2	Partial capture
09-09 17:57	40m	-5 / -	UB0SMX	- / -15	4	✓ Closing fragment
09-09 17:53	40m	- / -	RC6OX	+5 / -	3	Partial capture
09-05 15:27	40m	- / -8	UA4QK	-9 / -	4	✓ Closing fragment
09-05 15:27	40m	-14 / -	UN7PPV	- / -13	2	✓ Closing fragment
08-26 16:31	40m	- / -	RA5CO	-10 / -	2	✓ Closing fragment
08-24 15:52	20m	- / -5	TA2NJH	-12 / -	7	Partial capture
08-24 15:36	40m	- / -16	DL3KVR	+1 / -	3	✓ Closing fragment
08-21 13:11	20m	- / -8	UA1OJL	-3 / -	3	✓ Closing fragment
08-21 12:59	20m	- / -1	RX4SA	-10 / -	2	✓ Closing fragment
08-11 16:14	20m	- / -	ON4ASV	-2 / -	2	Partial capture
07-31 16:56	40m	-23 / -	RN3ZBX	-12 / -	2	✓ Closing observed
07-31 16:54	40m	-22 / -	R4WQ	- / 0	2	✓ Closing fragment
07-31 16:52	40m	-21 / -	RA6AR	-23 / -3	2	✓ Closing observed
07-31 16:44	40m	- / +3	RU3X	-19 / -	3	Partial capture
07-31 16:43	40m	- / -11	DH0GBC	-20 / -	2	Partial capture
07-29 04:59	40m	- / -	R2AL	-20 / -	2	✓ Closing fragment
07-25 15:19	40m	- / -9	RK6AH	-20 / -	2	Partial capture
07-13 17:04	40m	- / -20	SP7TF	-8 / -	2	✓ Closing fragment
07-12 11:38	20m	- / -15	IK4LZH	+6 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
171345 -13 1269  UB3XCA F6BHK JN24
171700  -4 2083  UB6ZDJ UB3XCA -05 (x2)
171830  -6 1272  CQ UB3XCA KO85 (x2)
172100  -2 2267  PA3EWP UB3XCA KO85 (x2)
172145  +2 2268  UB3XCA PA3EWP -04 (x3)
172430  -2 2194  EU6UE UB3XCA KO85 (x3)
170145  -7 1767  UB3XCA PD0RCQ JO21 (x2)

20m

UTC    dB Audio  Message
113915  +5  463  UB3XCA IK4LZH RR73
161415  -2 1852  UB3XCA ON4ASV JO11 (x2)
125930  -7 1762  UB3XCA RX4SA R-01 (x2)
131115  -7  969  UB3XCA UA1OJL LP04 (x3)
155230 -14 1679  UB3XCA TA2NJH -05 (x7)

10m

UTC    dB Audio  Message
122045 -24 1790  UB3XCA RG5A KN93

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.

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee