UB4FJC — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LO13

Receiver-side FT8 activity involving UB4FJC, decoded by SO8OO in southeastern Poland. 209 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 9 UTC dates in the available aggregate history. Observed between 2026-08-22 and 2026-10-01.

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 209 FT8 messages attributed to UB4FJC as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (58%), followed by 20 m (42%). Most decodes (55%) fell within the six-hour window 13:00-19:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.

Overview

209

Messages attributed

UTC dates decoded

Active 15-min windows

-15 dB

Estimated median S/N

Bands

40m · 121 20m · 88

First attributed message: 2026-08-22
Last attributed message: 2026-10-01 04:13 UTC

Observed FT8 message patterns

Attributed sample: 209 messages
Active dates: 9 UTC dates
Estimated median S/N: -15 dB
Estimated 10th-90th percentile: -22 to -11 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 102, moderate (-15 to -9 dB) 98, strong (≥ -8 dB) 9.

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 UB4FJC in decoded directed-looking exchanges:

YO4GIY · Romania ×3 RA9LL · Asiatic Russia ×2 UB8CPH · Asiatic Russia ×2 RX3ASQ · European Russia ×2 UA3LRN · European Russia ×2 A61FJ · United Arab Emirates F1ODM · France F5URG · France IK4LZH · Italy IQ4JO · Italy M0TRZ · England ON4AOI · Belgium

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 UB4FJC

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: LO13 · 129 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,507 km (approx.)
Last such locator decoded: 2026-09-11 20:28 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	UB4FJC S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-01 04:14	40m	- / -9	HA7TM	-14 / -	2	Partial capture
10-01 04:12	40m	-17 / -3	LA8ENA	-8 / -	3	✓ Closing observed
09-30 04:14	40m	- / -15	DK7ZT	-4 / -	3	Partial capture
09-30 04:08	40m	- / +2	ES2AJ	-10 / -	2	Partial capture
09-30 04:07	40m	- / -16	UA3LRN	-15 / -	2	✓ Closing fragment
09-28 04:46	40m	- / -	R2YW	-16 / -	3	Partial capture
09-28 04:44	40m	- / -12	F4FSY	-14 / -	2	Partial capture
09-28 04:18	40m	- / -2	RN6MA	-8 / -	2	✓ Closing fragment
09-27 06:39	40m	- / -	SP1ZMO	-19 / -	5	Partial capture
09-27 06:06	40m	- / -15	DK7ZT	-9 / -	3	Partial capture
09-27 06:04	40m	- / -16	RW3YS	-4 / -	4	✓ Closing fragment
09-27 05:55	40m	- / -	EW2GI	-14 / -	2	✓ Closing fragment
09-11 20:46	40m	- / -	UB3ANV	-20 / -	2	Partial capture
09-11 20:39	40m	- / -	2E0UMK	-16 / -	10	Partial capture
09-11 20:37	40m	- / -	LZ2INP	-8 / -	2	Partial capture
09-11 20:34	40m	- / -15	HG8LXL	-8 / -	5	✓ Closing fragment
09-11 20:33	40m	- / -9	DL2MIJ	+10 / -	2	✓ Closing fragment
09-11 20:28	40m	-13 / -15	DL2MIJ	+9 / -	3	Partial capture
09-11 20:14	40m	-15 / -	HG8LXL	-6 / -8	16	Partial capture
09-11 20:13	40m	- / -	HG0NPJ	+2 / -	2	✓ Closing fragment
09-11 19:48	40m	- / -22	YO4GIY	-6 / -	6	✓ Closing fragment
09-10 04:41	40m	- / -15	SV2AOB	-2 / -	2	✓ Closing fragment
09-10 04:38	40m	- / -16	RO6K	-10 / -	5	Partial capture
09-10 04:36	40m	- / -	YO6LM	+1 / -	2	Partial capture
09-10 04:35	40m	- / -12	DK7ZT	-21 / -	2	Partial capture
09-10 04:22	40m	- / -20	DK7ZT	-17 / -	4	Partial capture
09-10 04:16	40m	- / -12	RN6HK	-8 / -	4	✓ Closing fragment
09-10 04:16	40m	- / -	TA3NK	-8 / -	16	Partial capture
09-10 04:14	40m	- / -15	UI6O	-4 / -	2	Partial capture
09-09 04:22	40m	-16 / -	LZ3CB	- / -	2	Partial capture
09-09 04:15	40m	-15 / -	LZ3CB	- / -	11	Partial capture
09-09 04:14	40m	- / -7	DK7ZT	-22 / -	2	Partial capture
09-09 04:13	40m	-10 / -8	R7KM	+7 / -8	9	✓ Full exchange observed
09-09 04:10	40m	-17 / -	RA4PIS	- / -7	3	✓ Closing fragment
09-09 04:08	40m	-16 / -	RC9WC	- / -7	2	✓ Closing fragment
09-09 04:08	40m	- / -	F4BYA	-3 / -	3	Partial capture
09-09 04:05	40m	-16 / -12	DL3MIB	-4 / -7	4	✓ Full exchange observed
09-09 04:04	40m	-15 / 0	UA3WG	-9 / -6	5	✓ Full exchange observed
09-09 04:03	40m	- / -	F4BYA	-5 / -	3	Partial capture
09-09 04:03	40m	- / -	R6LKG	-15 / -	3	Partial capture
09-09 04:02	40m	-11 / -	YO4NF	- / -8	2	✓ Closing fragment
09-09 04:01	40m	-14 / -10	R6TA	-4 / -10	4	✓ Full exchange observed
09-09 03:58	40m	-12 / -	UA9SY	- / -6	3	✓ Closing fragment
09-09 03:58	40m	-14 / -10	RA6OY	+8 / -7	8	✓ Full exchange observed
09-09 03:56	40m	-19 / -	R1AI	-15 / -7	5	✓ Closing observed
09-05 17:39	40m	- / -5	R1943OD	-2 / -	3	Partial capture
08-29 06:37	20m	- / -20	I1RJP	-2 / -	3	Partial capture
08-26 18:39	40m	- / -	RC6OX	-8 / -	2	Partial capture
08-26 18:35	40m	- / -14	UA1AEL	-8 / -	2	Partial capture
08-26 18:33	40m	- / -1	RX3ASQ	-8 / -	17	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
044645 -14 1480  UB4FJC R2YW KO62 (x3)
040715 -16 2188  UB4FJC UA3LRN -16 (x2)
040845 -10 2428  UB4FJC ES2AJ KO29 (x2)
041445  -4 1907  UB4FJC DK7ZT -15 (x3)
041215  -8 1893  UB4FJC LA8ENA -03 (x2)
041300 -17 1358  LA8ENA UB4FJC 73
041415 -16  536  UB4FJC HA7TM JN97 (x2)

20m

UTC    dB Audio  Message
144015 +10 1592  UB4FJC F4ACR IN96 (x3)
145230 -21 1592  IQ4JO UB4FJC LO13 (x2)
150230 -12 1592  HA0AA UB4FJC LO13 (x3)
150800 -15 1593  A61FJ UB4FJC R-07 (x2)
150845 -10 1734  UB4FJC A61FJ RR73
063630 -16 1457  UB4FJC UI6O RRR
063730  +1 2752  UB4FJC I1RJP JN45 (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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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