OZ4TX — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Denmark Most frequent locator attributed to this token: JO55

Receiver-side FT8 activity involving OZ4TX, decoded by SO8OO in southeastern Poland. 55 FT8 messages attributed to this token as transmitter, on 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-08-22.

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 55 FT8 messages attributed to OZ4TX as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Most decodes (78%) fell within the six-hour window 12:00-18:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

20m · 55

First attributed message: 2026-06-08
Last attributed message: 2026-08-22 18:16 UTC

Observed FT8 message patterns

Attributed sample: 55 messages
Active dates: 4 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -17 to -6 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 13, moderate (-15 to -9 dB) 28, strong (≥ -8 dB) 14.

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 OZ4TX in decoded directed-looking exchanges:

2E0IJC · England DB1IUA · Fed. Rep. of Germany KP4EJ · Puerto Rico LZ1BT · Bulgaria OK1AYM · Czech Republic OK5AG/P · Czech Republic ON3VN · Belgium RA1QX · European Russia VE1WT · Canada

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 OZ4TX

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: JO55 · 42 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 953 km (approx.)
Last such locator decoded: 2026-08-22 14:46 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	OZ4TX S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-22 18:11	20m	-15 / -	UA3VVA	-18 / +3	11	Partial capture
08-22 18:01	20m	- / -5	F8KIC/P	-15 / -	2	Partial capture
08-22 14:02	20m	- / -	F1HSY	-7 / -	2	Partial capture
08-22 13:43	20m	- / -5	ON3VN	-7 / -	3	✓ Closing fragment
08-20 23:20	20m	- / -10	KP4EJ	-2 / -	3	✓ Closing fragment
08-20 22:18	20m	- / -15	VE1WT	-6 / -	2	✓ Closing fragment
08-20 17:15	20m	- / -	LZ1BT	-8 / -	2	Partial capture
08-20 17:13	20m	- / +2	RA1QX	-2 / -	3	✓ Closing fragment
08-20 17:06	20m	-9 / -	LZ1BT	- / +2	4	✓ Closing fragment
08-20 16:02	20m	-20 / -	XU7O	- / -	2	Partial capture
08-20 15:35	20m	-16 / -	8B81JB	- / -	5	Partial capture
08-20 15:33	20m	-16 / -	<...>	- / -	2	Partial capture
08-20 15:23	20m	- / -15	2E0IJC	+5 / -	3	✓ Closing fragment
08-20 14:50	20m	- / -12	UT5MD	+16 / -	3	Partial capture
08-20 14:42	20m	- / -15	F1PPH	-9 / -	7	Partial capture
08-20 14:37	20m	- / -	F1PPH	-10 / -	3	Partial capture
07-10 19:14	20m	- / -	DL1R	+4 / -	7	Partial capture
07-10 19:08	20m	- / -13	OK1AYM	+3 / -	3	✓ Closing fragment
07-08 12:44	20m	- / -14	F1HFP	-22 / -	2	Partial capture
07-08 12:36	20m	- / -12	DB1IUA	-4 / -	3	✓ Closing fragment
07-08 12:22	20m	- / +1	OK5AG/P	+1 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
180100 -16 2556  OZ4TX F8KIC/P JN29 (x2)
181130 -21 1310  OZ4TX UA3VVA LO06 (x2)
181200 -11 2637  OZ4TX ON8MA R-05
181230 -19 1310  OZ4TX UA3VVA LO06 (x7)
181615 -15 2572  UA3VVA OZ4TX +03
181630 -11 1310  OZ4TX UA3VVA LO06
234300 -24 1177  OZ4TX KB1FJC -19

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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