UB4FIV — 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: LO23

Receiver-side FT8 activity involving UB4FIV, decoded by SO8OO in southeastern Poland. 16 FT8 messages attributed to this token as transmitter, on 40m, across 1 UTC dates in the available aggregate history. Last observed 2026-11-04.

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 16 FT8 messages attributed to UB4FIV as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). In this small sample, the estimated median decoder S/N was -9 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

40m · 16

First attributed message: 2026-11-04
Last attributed message: 2026-11-04 19:26 UTC

Observed FT8 message patterns

Attributed sample: 16 messages
Active dates: 1 UTC dates
Estimated median S/N: -9 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 3, moderate (-15 to -9 dB) 7, strong (≥ -8 dB) 6.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with UB4FIV in decoded directed-looking exchanges:

9A1CCB · Croatia 9A5CW · Croatia DS2MGT · Republic of Korea EA3DY · Spain ES2AJ · Estonia HA7TM · Hungary HB9ELE · Switzerland PA7D · Netherlands R4GD · European Russia R6DZR · European Russia RA6FC · European Russia RZ6CO · European Russia

Most frequent locator attributed to UB4FIV

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: LO23 · 8 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,639 km (approx.)
Last such locator decoded: 2026-11-04 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	UB4FIV S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-04 21:35	40m	- / -5	IU8RFW	-2 / -	5	Partial capture
11-04 21:34	40m	- / -7	S58N	-9 / -	3	Partial capture
11-04 21:17	40m	- / -18	EA3DY	-10 / -	4	✓ Closing fragment
11-04 20:26	40m	- / -	IK1LJO	-20 / -	2	Partial capture
11-04 19:48	40m	- / -8	RZ6CO	-14 / -	2	✓ Closing fragment
11-04 19:21	40m	-7 / -	RC1C	- / -16	2	Partial capture
11-04 19:16	40m	- / -	ON7AC	-14 / -	6	Partial capture
11-04 19:08	40m	- / -	PD7BDN	0 / -	5	Partial capture
11-04 19:07	40m	- / -	R4FES	-16 / -	2	Partial capture
11-04 19:07	40m	- / -	YO2MKE	+6 / -	2	Partial capture
11-04 19:06	40m	-12 / -	DS2MGT	- / -16	2	✓ Closing fragment
11-04 18:15	40m	- / -17	ES2AJ	+4 / -	3	✓ Closing fragment
11-04 18:09	40m	- / -24	PE1NPS	-13 / -	8	Partial capture
11-04 18:05	40m	-16 / -	PA7D	- / -11	2	✓ Closing fragment
11-04 18:00	40m	- / -20	HB9ELE	+7 / -	7	✓ Closing fragment
11-04 17:54	40m	- / -1	9A5CW	+14 / -	6	✓ Closing fragment
11-04 17:51	40m	- / -21	9A1CCB	-7 / -	3	✓ Closing fragment
11-04 17:51	40m	- / -	SV1ENG	-11 / -	5	Partial capture
11-04 17:50	40m	- / -11	HA7TM	+8 / -	3	✓ Closing fragment
11-04 17:45	40m	- / -15	R6DZR	-13 / -	4	✓ Closing fragment
10-18 15:06	40m	- / -	UA4FKT	+4 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
202600 -24 1653  UB4FIV IK1LJO JN45 (x2)
211730  -9 1234  UB4FIV EA3DY -18 (x4)
213430  -7  870  UB4FIV S58N JN76
213500  -6  664  UB4FIV EB2EMZ IN83
213530  -3 2909  UB4FIV IU8RFW JN70
213600 -11  870  UB4FIV S58N JN76
213600  -2 2909  UB4FIV IU8RFW JN70
213630 -10  870  UB4FIV S58N R-07
213700  +2 2909  UB4FIV IU8RFW JN70 (x3)

CW

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

Explore CW reception at SO8OO

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