9A5TDL — FT8 activity observed at SO8OO

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

Receiver-side FT8 activity involving 9A5TDL, decoded by SO8OO in southeastern Poland. 125 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-23 and 2026-09-13.

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 125 FT8 messages attributed to 9A5TDL as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (88%), followed by 80 m (12%). In this small sample, the estimated median decoder S/N was -6 dB; no usual signal pattern is inferred.

Overview

125

Messages attributed

UTC dates decoded

Active 15-min windows

-6 dB

Estimated median S/N

Bands

80m · 15 40m · 110

First attributed message: 2026-06-23
Last attributed message: 2026-09-13 08:28 UTC

Observed FT8 message patterns

Attributed sample: 125 messages
Active dates: 2 UTC dates
Estimated median S/N: -6 dB
Estimated 10th-90th percentile: -11 to -1 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 25, strong (≥ -8 dB) 98.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with 9A5TDL in decoded directed-looking exchanges:

F4HTA · France 9A3AUH · Croatia DF5DY · Fed. Rep. of Germany DF5RA · Fed. Rep. of Germany DH1HF · Fed. Rep. of Germany DK2SW · Fed. Rep. of Germany DL1NB · Fed. Rep. of Germany DL6RS · Fed. Rep. of Germany DL6UCK · Fed. Rep. of Germany EC3A · Spain F1PBZ · France F4AWT · France

Most frequent locator attributed to 9A5TDL

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 · 59 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 521 km (approx.)
Last such locator decoded: 2026-09-13 08:23 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	9A5TDL S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-13 08:24	40m	-3 / -	IU1QZR	- / -20	10	Partial capture
09-13 08:19	40m	-4 / -	F1IQH	- / -	8	Partial capture
09-13 08:18	40m	-5 / -3	DL9KM	-5 / +2	9	Partial capture
09-13 08:02	40m	-8 / -18	DF7NO	-12 / +7	7	Partial capture
09-13 08:02	40m	-10 / -	DL1NB	- / -11	3	✓ Closing fragment
09-13 07:58	40m	-9 / -	ON6HC	- / -16	2	✓ Closing fragment
09-13 07:55	40m	-8 / -8	HA3HZ	-3 / +4	6	✓ Full exchange observed
09-13 07:53	40m	-8 / -10	DF5DY	-9 / -11	4	✓ Full exchange observed
09-13 07:42	40m	-6 / -	IQ4JO	- / -1	2	✓ Closing fragment
09-13 07:39	40m	-8 / -	PD0WL	- / -15	4	✓ Closing fragment
09-13 07:32	40m	-12 / -4	DK2SW	-9 / -21	4	✓ Full exchange observed
09-13 07:31	40m	-7 / -11	DL6RS	-3 / -16	7	✓ Full exchange observed
09-13 07:28	40m	-8 / +2	9A3AUH	0 / +10	6	✓ Full exchange observed
09-13 07:28	40m	-10 / -	DH1HF	- / -21	2	✓ Closing fragment
09-13 07:25	40m	-7 / -	F4AWT	- / -17	2	✓ Closing fragment
09-13 07:23	40m	-14 / -10	DF5RA	-9 / -7	5	✓ Full exchange observed
09-13 07:19	40m	-7 / +1	DL6UCK	-6 / -11	6	✓ Full exchange observed
09-13 05:36	40m	- / -	SP1ZMO	-6 / -	5	Partial capture
09-13 05:33	40m	-3 / -	UA4FKT	- / -9	10	Partial capture
09-13 05:29	40m	- / -	UA4FKT	-12 / -	2	Partial capture
09-13 05:28	40m	-6 / -8	IU8RFW	-15 / -1	3	✓ Full exchange observed
09-13 05:23	40m	-4 / -	IZ8PPI	- / -10	2	✓ Closing fragment
09-13 05:21	40m	-2 / -8	F1PBZ	-14 / 0	3	✓ Full exchange observed
09-13 05:19	40m	-5 / -	SP5MIG	- / -2	3	Partial capture
09-13 05:18	40m	- / -	IU8RFW	-10 / -	2	Partial capture
09-13 05:17	40m	-3 / -	UT2MZ	- / -3	2	✓ Closing fragment
09-13 05:12	40m	- / -2	R2PX	-13 / -	3	✓ Closing fragment
09-13 05:09	40m	- / -3	R5AV	-14 / -	2	✓ Closing fragment
09-13 05:06	40m	- / -4	SM7TZK	+1 / -	2	✓ Closing fragment
08-30 14:06	20m	- / -13	F4HTA	+8 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
082130  +1 2190  F1IQH 9A5TDL JN86
082145  -6 1804  9A5TDL DL9KM R-03
082200  -8 2189  F1IQH 9A5TDL JN86 (x3)
082400  -2 2189  IU1QZR 9A5TDL -20 (x10)

20m

UTC    dB Audio  Message
140645 +10  624  9A5TDL F4HTA -13 (x2)

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