9A4BA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Croatia Most frequent locator attributed to this token: JN95

Receiver-side FT8 activity involving 9A4BA, decoded by SO8OO in southeastern Poland. 45 FT8 messages attributed to this token as transmitter, on 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-06-28 and 2026-08-29.

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 45 FT8 messages attributed to 9A4BA as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Several six-hour UTC windows tied for the largest share (96%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (96%); the estimated median was +7 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

+7 dB

Estimated median S/N

Bands

20m · 45

First attributed message: 2026-06-28
Last attributed message: 2026-08-29 07:22 UTC

Observed FT8 message patterns

Attributed sample: 45 messages
Active dates: 3 UTC dates
Estimated median S/N: +7 dB
Estimated 10th-90th percentile: -2 to +12 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 0, strong (≥ -8 dB) 43.

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 9A4BA in decoded directed-looking exchanges:

DK8HC/P · Fed. Rep. of Germany EA3CY · Spain F1IQH · France F4AXK · France HL5BPF · Republic of Korea JY5IB · Jordan SP8BJU · Poland SV8NAJ · Greece VK2GCA · Australia

Most frequent locator attributed to 9A4BA

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: JN95 · 20 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 536 km (approx.)
Last such locator decoded: 2026-08-29 07:22 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	9A4BA S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-29 09:43	20m	- / -4	F4AXK	-7 / -	3	✓ Closing fragment
08-29 07:21	20m	+4 / -	5N0YEN	- / -	2	Partial capture
08-29 07:13	20m	+6 / -15	Z62NS	-1 / -14	17	Partial capture
08-29 07:10	20m	-2 / -	VK4XK	- / -	2	Partial capture
08-29 07:04	20m	+6 / -	VK2WAJ	- / -	2	Partial capture
08-29 06:59	20m	+2 / -	EA3CY	- / -25	3	✓ Closing fragment
08-29 06:57	20m	+10 / -	JY5IB	- / +6	2	✓ Closing fragment
08-29 06:57	20m	+4 / -	F4LNM	+5 / +2	3	Partial capture
08-29 06:54	20m	+10 / -	DK8HC/P	- / +1	2	✓ Closing fragment
08-29 06:50	20m	+8 / -	UW8SM	- / +6	2	Partial capture
08-29 06:49	20m	+10 / -	VK2GCA	- / -25	4	✓ Closing fragment
08-29 06:48	20m	+10 / -	SV8NAJ	- / -13	2	✓ Closing fragment
08-29 06:47	20m	+2 / -	SP8BJU	- / -7	2	✓ Closing fragment
08-21 06:57	20m	+4 / -	ZL2NU	- / -	4	Partial capture
08-02 20:54	20m	- / -2	F1IQH	-14 / -	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
071630  +3  729  9A4BA Z62NS -15
071645  +6 1247  Z62NS 9A4BA R-14
071700  -3  729  9A4BA Z62NS -15
071715  +6 1248  Z62NS 9A4BA R-17
071730  +1  729  9A4BA Z62NS -15
071745  +8 1247  Z62NS 9A4BA R-19
071800  -8  729  9A4BA Z62NS -15
071815  +6 1248  Z62NS 9A4BA R-15
071830  -7  730  9A4BA Z62NS -15
071845  +4 1248  Z62NS 9A4BA R-15
072145  +2 1229  5N0YEN 9A4BA JN95 (x2)
094300 -10 2557  9A4BA F4AXK IN96 (x3)

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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