UB4LAN — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LO44

Receiver-side FT8 activity involving UB4LAN, decoded by SO8OO in southeastern Poland. 54 FT8 messages attributed to this token as transmitter, on 10m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-06-20.

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 54 FT8 messages attributed to UB4LAN as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (100%). Several six-hour UTC windows tied for the largest share (48%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -17 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-17 dB

Estimated median S/N

Bands

10m · 54

First attributed message: 2026-06-06
Last attributed message: 2026-06-20 13:29 UTC

Observed FT8 message patterns

Attributed sample: 54 messages
Active dates: 9 UTC dates
Estimated median S/N: -17 dB
Estimated 10th-90th percentile: -22 to -10 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 30, moderate (-15 to -9 dB) 23, strong (≥ -8 dB) 1.

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 UB4LAN in decoded directed-looking exchanges:

DB4SNK · Fed. Rep. of Germany DL3WA · Fed. Rep. of Germany DN9DSP · Fed. Rep. of Germany F4BYF · France M6OTU · England PR2NX · Brazil R1AP · European Russia R6YG · European Russia R6ZEJ · European Russia

Most frequent locator attributed to UB4LAN

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: LO44 · 28 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,908 km (approx.)
Last such locator decoded: 2026-06-20 13:29 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	UB4LAN S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-27 18:38	10m	- / -13	DJ4JZ	-19 / -	4	Partial capture
08-27 18:34	10m	- / -20	DB4SNK	-4 / -	2	✓ Closing fragment
08-27 07:23	10m	- / -3	F4BYF	-6 / -	2	✓ Closing fragment
08-21 19:02	10m	- / -21	DN9DSP	-12 / -	2	✓ Closing fragment
07-23 16:09	10m	- / -	R6YG	-21 / -	2	✓ Closing fragment
07-07 19:54	20m	- / -	I1RJP	+4 / -	2	Partial capture
07-07 19:47	20m	- / -	I1RJP	+1 / -	3	Partial capture
06-26 19:41	10m	- / -15	PR2NX	-1 / -	2	✓ Closing fragment
06-26 18:53	10m	- / -	R1AV	-6 / -	2	Partial capture
06-26 09:19	10m	- / +1	UA6HGM	-10 / -	2	Partial capture
06-26 09:02	10m	- / -1	DL3WA	+6 / -	6	✓ Closing fragment
06-25 08:36	10m	- / -10	RW6HPS	-14 / -	3	Partial capture
06-25 08:31	10m	- / -	LZ4VR	-18 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
194115  -2 2693  UB4LAN PR2NX -15 (x2)
160930 -22 1953  UB4LAN R6YG LN04 (x2)
055345 -11  675  UB4LAN TA7I KN91
190215 -11 1851  UB4LAN DN9DSP -21 (x2)
072330  -6  673  UB4LAN F4BYF -03 (x2)
183415  +0  578  UB4LAN DB4SNK -20 (x2)
183815 -21 1712  UB4LAN DJ4JZ JO30 (x4)

20m

UTC    dB Audio  Message
194700  +3  374  UB4LAN I1RJP JN45 (x5)

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