9A4UZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Croatia Most frequent locator attributed to this token: JN86

Receiver-side FT8 activity involving 9A4UZ, decoded by SO8OO in southeastern Poland. 91 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 17 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-08-21.

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 91 FT8 messages attributed to 9A4UZ as the transmitting token by decoded message structure across 17 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (52%), followed by 20 m (46%) and 80 m (2%). Several six-hour UTC windows tied for the largest share (75%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (71%); the estimated median was -6 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-6 dB

Estimated median S/N

Bands

80m · 2 40m · 47 20m · 42

First attributed message: 2026-06-10
Last attributed message: 2026-08-21 02:05 UTC

Observed FT8 message patterns

Attributed sample: 91 messages
Active dates: 17 UTC dates
Estimated median S/N: -6 dB
Estimated 10th-90th percentile: -14 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 8, moderate (-15 to -9 dB) 18, strong (≥ -8 dB) 65.

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 9A4UZ in decoded directed-looking exchanges:

9A4ZM · Croatia CN8NS · Morocco EA1IOK · Spain OH0ERF · Aland Islands DL6LG · Fed. Rep. of Germany DL7ACA · Fed. Rep. of Germany K1PAD · United States OS4K · Belgium SN1A · Poland SP6FME · Poland SV9QWC · Crete TJ1GD/P · Cameroon

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 9A4UZ

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: JN86 · 57 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 521 km (approx.)
Last such locator decoded: 2026-08-21 02:03 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	9A4UZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-21 01:59	40m	-6 / -	AA4NP	- / -11	4	Partial capture
08-21 01:56	40m	-6 / -	K1PAD	- / -12	4	✓ Closing fragment
08-12 02:49	20m	-18 / -	K6IL	- / -	2	Partial capture
08-12 02:27	20m	-17 / -17	9A4ZM	-3 / -	4	✓ Closing observed
08-12 02:25	20m	-18 / -	CN8NS	- / -7	4	✓ Closing fragment
08-10 20:20	20m	-8 / -	OH0ERF	- / -18	3	✓ Closing fragment
08-10 20:18	20m	-7 / -	K5MGY	- / -	2	Partial capture
08-10 20:17	20m	-9 / -	N3PAY	- / -	3	Partial capture
07-28 23:34	20m	- / -	MW7RHR	-6 / -	2	Partial capture
07-28 23:27	40m	-3 / -	CU6AB	- / -	2	Partial capture
07-28 23:25	40m	0 / -	DL7ACA	-3 / -	3	✓ Closing observed
07-28 23:22	40m	-7 / -	TJ1GD/P	- / -9	6	✓ Closing fragment
07-22 19:02	20m	- / -5	EA1IOK	-6 / -	4	✓ Closing fragment
07-20 20:07	40m	-8 / -	SP6FME	-10 / -16	3	✓ Closing observed
07-20 20:05	40m	-6 / -8	SV9QWC	-10 / -2	4	✓ Full exchange observed
07-20 19:46	40m	-4 / -	SP9D	- / -5	4	Partial capture
07-20 19:41	40m	-6 / -	OS4K	- / -15	2	✓ Closing fragment
07-20 19:38	40m	-6 / +1	SN1A	-10 / +2	4	✓ Full exchange observed
07-20 19:34	40m	-6 / -	VJ6X	- / -22	4	Partial capture
07-18 20:16	20m	-3 / -	HB0/HB9FXF	- / -	3	Partial capture
07-18 20:16	20m	-4 / -	<...>	- / -	2	Partial capture
07-17 20:46	20m	0 / -	3W9A	- / -	3	Partial capture
07-16 20:05	80m	- / +1	<...>	0 / -	7	Partial capture
07-16 20:04	80m	- / +1	OL900JAR	+4 / -	2	Partial capture
07-16 20:01	80m	+4 / -	<...>	- / -	2	Partial capture
07-07 19:47	20m	-11 / -14	JA0LFV	-5 / -	3	Partial capture
06-25 20:09	20m	-6 / -	9J2FI	- / -	5	Partial capture
06-25 20:04	20m	-8 / -	KF0YOB	- / -	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
232600  -3 2772  9A4UZ DL7ACA 73
232715  -1 2594  CU6AB 9A4UZ JN86 (x2)
212830 -18 1746  W2RLW 9A4UZ JN86
015300  +0  564  KF9UG 9A4UZ JN86
015630  -3  870  K1PAD 9A4UZ JN86 (x4)
015930  -5 2317  AA4NP 9A4UZ R-11 (x4)
020300  -6 2093  KR4FJQ 9A4UZ JN86
020500  -5  422  KJ3LLY 9A4UZ R-20

20m

UTC    dB Audio  Message
201900  -7 2758  K5MGY 9A4UZ JN86
202000  -7 2756  OH0ERF 9A4UZ R-18 (x3)
022545 -21 2024  CN8NS 9A4UZ JN86 (x4)
022730  +1 2018  9A4UZ 9A4ZM JN86 (x2)
022815 -17 2021  9A4ZM 9A4UZ RR73
022830  -4 2019  9A4UZ 9A4ZM 73
022930 -17 2020  N1WI 9A4UZ JN86
024915 -16 2210  K6IL 9A4UZ JN86 (x2)

80m

UTC    dB Audio  Message
200145 +10  619  <...> 9A4UZ JN86 (x2)
200400  +2 1620  9A4UZ OL900JAR +01 (x2)
200530  +7 1620  9A4UZ <...> +01 (x7)

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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