UB3LBU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO63

Receiver-side FT8 activity involving UB3LBU, decoded by SO8OO in southeastern Poland. 1,533 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 43 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-05.

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 1,533 FT8 messages attributed to UB3LBU as the transmitting token by decoded message structure across 43 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (49%), followed by 80 m (43%) and 160 m (4%). Most decodes (89%) fell within the six-hour window 15:00-21:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -7 dB.

Overview

1,533

Messages attributed

UTC dates decoded

242

Active 15-min windows

-7 dB

Estimated median S/N

Bands

160m · 62 80m · 655 40m · 752 20m · 48 10m · 16

First attributed message: 2026-06-07
Last attributed message: 2026-10-05 19:27 UTC

Observed FT8 message patterns

Attributed sample: 1,533 messages
Active dates: 43 UTC dates
Estimated median S/N: -7 dB
Estimated 10th-90th percentile: -16 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 177, moderate (-15 to -9 dB) 485, strong (≥ -8 dB) 871.

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 UB3LBU in decoded directed-looking exchanges:

RA2FU · Kaliningrad ×6 UA3PTK · European Russia ×5 LZ1ZF · Bulgaria ×5 US1EA · Ukraine ×5 R5AV · European Russia ×4 RC6OD · European Russia ×4 R2AKN · European Russia ×3 EU4U · Belarus ×3 R3PJ · European Russia ×3 R4UA · European Russia ×3 R5GG · European Russia ×3 RA3SO · European Russia ×3

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 UB3LBU

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: KO63 · 733 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 866 km (approx.)
Last such locator decoded: 2026-10-05 19:26 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	UB3LBU S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-05 19:26	80m	+1 / -9	R3YAU	+1 / -2	6	✓ Full exchange observed
10-05 18:53	80m	- / -	R2BPS	-11 / -	4	Partial capture
10-05 18:49	80m	-4 / -	RX4SA	- / -19	4	✓ Closing fragment
10-05 18:43	80m	-1 / -	R3LDK	+4 / -	4	✓ Closing observed
10-03 13:02	40m	-14 / -	R4ZZ	- / -3	3	✓ Closing fragment
10-03 13:00	40m	-10 / -	RX9CET	- / -15	3	✓ Closing fragment
09-25 16:56	40m	-7 / -	R4DD	-24 / 0	4	✓ Closing observed
09-25 16:50	40m	-10 / -8	R3SN	-16 / -14	8	✓ Full exchange observed
09-25 16:47	40m	-10 / -13	UA3PY	-9 / -	3	✓ Closing observed
09-25 16:28	80m	0 / -	EV1R	+6 / -	2	✓ Closing observed
09-25 16:21	40m	-8 / +5	R3TKM	-8 / -2	6	✓ Full exchange observed
09-25 15:30	40m	-10 / -	R2ZCA	-14 / -	2	✓ Closing observed
09-25 15:26	40m	- / -14	R5AV	-14 / -	2	✓ Closing fragment
09-25 15:24	40m	-9 / -6	R3DFE	-17 / -4	5	✓ Full exchange observed
09-25 15:23	40m	-8 / -	R8CGO	- / -5	3	✓ Closing fragment
09-25 15:20	40m	-12 / -	R5GG	- / -8	3	✓ Closing fragment
09-25 15:18	40m	-8 / -	R3PJ	- / -2	3	✓ Closing fragment
09-24 19:05	80m	-2 / -	R5AV	+1 / -	4	✓ Closing observed
09-24 19:03	40m	-6 / -	R2FBW	- / -7	2	Partial capture
09-24 18:28	40m	-10 / -7	RC1BQ	-10 / -5	5	✓ Full exchange observed
09-24 18:13	80m	-8 / -	UA4FKT	- / -	7	Partial capture
09-24 18:10	80m	-6 / -	UA3PTK	-4 / -2	5	✓ Full exchange observed
09-24 18:07	80m	-8 / -5	RN3QQT	-1 / -1	4	✓ Full exchange observed
09-24 17:40	80m	0 / -	RW4CCW	- / -18	2	Partial capture
09-24 17:37	80m	- / +7	R3PLN	-4 / -	2	✓ Closing fragment
09-24 17:30	80m	-5 / -	R3PLA	- / -	2	Partial capture
09-24 17:27	80m	0 / -2	R3UG	-5 / 0	4	✓ Full exchange observed
09-22 18:17	80m	-4 / -	UA3PTY	- / -	3	✓ Closing fragment
09-22 18:08	80m	- / -10	R4ABU	-8 / -	4	✓ Closing fragment
09-22 18:01	80m	-1 / -	UB4CLH	- / -	2	Partial capture
09-22 17:58	80m	-5 / -15	RX6DA	-1 / -	3	✓ Closing observed
09-22 17:54	40m	0 / -	LZ1ZF	-24 / -	2	✓ Closing observed
09-22 16:47	40m	-4 / -	R8OAE	-17 / -16	5	✓ Closing observed
09-22 16:44	40m	-2 / -	R8OAE	- / -	2	Partial capture
09-21 18:37	80m	- / -5	RA2FU	-5 / -	3	✓ Closing fragment
09-20 13:36	40m	-6 / -	R2YW	+1 / +4	4	✓ Full exchange observed
09-20 13:33	40m	-8 / -	RZ4FWA	- / -	3	Partial capture
09-20 13:29	40m	-13 / -	R9SAP	- / -12	4	✓ Closing fragment
09-20 13:26	40m	-6 / -	UA9FMT	- / -11	3	✓ Closing fragment
09-20 12:59	40m	-13 / -	R1AV	- / +3	3	✓ Closing fragment
09-20 12:51	40m	-11 / -	UA4FOV	- / -11	2	Partial capture
09-20 12:46	40m	-11 / -2	RA3LJ	-14 / -4	5	✓ Full exchange observed
09-20 12:43	40m	-14 / -	UA3PTK	- / +1	2	✓ Closing fragment
09-19 18:41	40m	+3 / -	R4FV	- / -	6	Partial capture
09-19 18:39	40m	0 / -	R4FJ	- / -	2	✓ Closing fragment
09-19 18:24	80m	+6 / -	R3VA	- / -4	12	✓ Closing fragment
09-19 18:15	80m	- / -	DO2ANW	-8 / -	2	Partial capture
09-19 18:14	80m	-6 / -	R9SS	- / -	3	Partial capture
09-19 18:10	80m	- / -5	R3LAF	+4 / -	2	✓ Closing fragment
09-19 18:07	80m	0 / -	R1TAX	- / -21	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
184430  -2 1497  R3LDK UB3LBU 73
184900  -7 1497  RX4SA UB3LBU KO63 (x4)
185315 -12  754  UB3LBU R2BPS KO85 (x4)
192600  -4 1496  R3YAU UB3LBU KO63 (x2)
192645  +3 1633  UB3LBU R3YAU -09
192700  +5 1496  R3YAU UB3LBU R-04
192715  -1 1633  UB3LBU R3YAU RR73
192730  +4 1496  R3YAU UB3LBU 73

40m

UTC    dB Audio  Message
165230 -15  984  UB3LBU R3SN -08
165245 -10 1524  R3SN UB3LBU R-14
165300 -17  984  UB3LBU R3SN RR73
165315 -10 1524  R3SN UB3LBU 73
165615  -7 1525  R4DD UB3LBU KO63 (x2)
165700 -24 1560  UB3LBU R4DD RR73
165715  -8 1524  R4DD UB3LBU 73
130000  -9 1524  RX9CET UB3LBU KO63 (x3)
130200 -13 1523  R4ZZ UB3LBU KO63 (x3)
183615  -8 1528  RA4ADF UB3LBU KO63

20m

UTC    dB Audio  Message
060745  -7 1563  UA6EED UB3LBU KO63
060800 +24 2740  UB3LBU UA6EED -09 (x2)
061215 -24 1560  UA6EED UB3LBU R-10
061230 +10 2740  UB3LBU UA6EED RR73
061245 -24 1560  UA6EED UB3LBU 73
094915 -24 1546  UB1N UB3LBU KO63
183315  -4 1263  UB3LBU LZ1ZF +07 (x2)
093000  +9 1243  UB3LBU R6OP -07
093015 -13 1573  R6OP UB3LBU R-04
093030 +13 1243  UB3LBU R6OP RR73
093615 -17 3071  UB3LBU UB8CPH -06
082500  -9 1953  UB3LBU UA4POO -15 (x2)

160m

UTC    dB Audio  Message
192415 -13 1494  CQ PW UB3LBU KO63
192445 -15 1683  UB3LBU UA3LKM KO65
192445  -7 1494  CQ PW UB3LBU KO63 (x9)
193145 -16 1631  UB3LBU UD8S -15 (x4)

10m

UTC    dB Audio  Message
085245 -12  680  UB3LBU SV2CLJ KN10
065445 -21 1797  UB3LBU UD8S -12
065615 -12  821  UB3LBU UA9MA +08
065700 -21 1536  UA9MA UB3LBU 73
065800 -17 1534  UA9FKM UB3LBU 73
065945 -23 1531  RA9LL UB3LBU R-19
070600 -11 2522  UB3LBU RC7C RR73
101145 -11 1421  UB3LBU PA3GAE JO21 (x4)
090315  -4 2805  UB3LBU R7RAG RR73
091715 -14 1538  UB3LBU S56A R-03 (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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