UA4HTZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LO53

Receiver-side FT8 activity involving UA4HTZ, decoded by SO8OO in southeastern Poland. 23 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 3 UTC dates in the available aggregate history. Observed between 2026-09-16 and 2026-09-19.

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 23 FT8 messages attributed to UA4HTZ as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (83%), followed by 40 m (17%). Several six-hour UTC windows tied for the largest share (83%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-11 dB

Estimated median S/N

Bands

80m · 19 40m · 4

First attributed message: 2026-09-16
Last attributed message: 2026-09-19 20:25 UTC

Observed FT8 message patterns

Attributed sample: 23 messages
Active dates: 3 UTC dates
Estimated median S/N: -11 dB
Estimated 10th-90th percentile: -18 to +3 dB
Recurring-pattern threshold: Met

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

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 UA4HTZ in decoded directed-looking exchanges:

EX7CQ · Kyrgyzstan

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 UA4HTZ

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: LO53 · 21 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,036 km (approx.)
Last such locator decoded: 2026-09-19 20:25 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	UA4HTZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-19 20:21	80m	-15 / -	5Z4AB	- / -	5	Partial capture
09-19 20:12	80m	-11 / -	5Z4AB	- / -	3	Partial capture
09-19 19:32	80m	-12 / -	V51WH	- / -	2	Partial capture
09-19 19:19	80m	-17 / -	V51WH	- / -	4	Partial capture
09-19 18:12	160m	- / -26	RZ6BS	-2 / -	3	Partial capture
09-19 18:12	160m	- / -9	RZ6LY	+7 / -	3	Partial capture
09-19 18:11	160m	- / -9	EX7CQ	-18 / -	2	✓ Closing fragment
09-17 15:12	40m	- / -	R2GCV	-4 / -	2	Partial capture
09-17 03:32	40m	- / -9	RW6ATD	+17 / -	2	Partial capture
09-17 03:30	40m	-4 / -	UB1AVZ/P	- / +5	3	Partial capture
09-17 02:44	40m	-17 / -4	OA4ENG	-18 / -7	2	Partial capture
09-16 17:33	80m	- / -	UA3ZQN	-3 / -	2	Partial capture
09-16 17:32	80m	+3 / -	KH8WW	- / -	4	Partial capture
09-16 17:26	80m	- / -	R1AV	-1 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
191915 -19  484  V51WH UA4HTZ LO53 (x7)
201230 -11  288  5Z4AB UA4HTZ LO53 (x8)

160m

UTC    dB Audio  Message
181130 -13 1690  UA4HTZ EX7CQ -09 (x2)
181230  +9 1954  UA4HTZ RZ6LY -09
181230  +5 2072  UA4HTZ RZ6BS KN96
181300  +3 1954  UA4HTZ RZ6LY -09
181300  +2 2072  UA4HTZ RZ6BS KN96
181330  +8 1954  UA4HTZ RZ6LY -09
181330 -13 2072  UA4HTZ RZ6BS R-26

40m

UTC    dB Audio  Message
024430 -18 2401  UA4HTZ OA4ENG -04
024445 -17 1080  OA4ENG UA4HTZ R-07
033030  -3 2463  UB1AVZ/P UA4HTZ LO53 (x3)
033215 +16 2847  UA4HTZ RW6ATD -09 (x2)
151130  -6  987  UA4HTZ RA5AK -02
151230  -3 2265  UA4HTZ R2GCV KO92 (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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