EA3ISZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Spain Most frequent locator attributed to this token: JN01

Receiver-side FT8 activity involving EA3ISZ, decoded by SO8OO in southeastern Poland. 775 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 49 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-21.

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 775 FT8 messages attributed to EA3ISZ as the transmitting token by decoded message structure across 49 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (37%), followed by 80 m (33%) and 10 m (19%). The busiest six-hour window was 03:00-09:00 UTC, containing 48% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -16 dB.

Overview

775

Messages attributed

UTC dates decoded

200

Active 15-min windows

-16 dB

Estimated median S/N

Bands

80m · 253 60m · 58 40m · 28 20m · 287 10m · 149

First attributed message: 2026-06-07
Last attributed message: 2026-09-21 05:11 UTC

Observed FT8 message patterns

Attributed sample: 775 messages
Active dates: 49 UTC dates
Estimated median S/N: -16 dB
Estimated 10th-90th percentile: -23.8 to -8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 419, moderate (-15 to -9 dB) 260, strong (≥ -8 dB) 96.

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 EA3ISZ in decoded directed-looking exchanges:

9A9N · Croatia ×2 F5NAA · France ×2 IK2VFR/P · Italy ×2 IK4LZH · Italy ×2 F1PBZ · France ×2 ON1DGN · Belgium ×2 ON8DIP · Belgium ×2 DL9KM · Fed. Rep. of Germany ×2 EA1RT · Spain ×2 F4MZI · France ×2 IN3WZS · Italy ×2 OZ7KJ/P · Denmark ×2

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 EA3ISZ

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: JN01 · 573 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,858 km (approx.)
Last such locator decoded: 2026-09-21 05:11 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	EA3ISZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-21 05:06	80m	- / -10	M0KHR	-20 / -	2	Partial capture
09-21 04:45	80m	-17 / -8	F4LRA	-12 / -	6	✓ Closing observed
09-21 04:43	80m	-20 / -	EC3A	-19 / -	3	✓ Closing observed
09-21 04:38	80m	-14 / -6	EC5M	-16 / +6	4	✓ Full exchange observed
09-20 23:26	80m	-18 / +6	EA1RT	-15 / -	5	✓ Closing observed
09-20 23:19	80m	-12 / -	KP4AA	- / -	2	Partial capture
09-20 23:13	80m	-16 / -	IZ1HJU	- / -10	3	✓ Closing fragment
09-20 23:06	80m	- / -	PA0WPD	-24 / -	2	Partial capture
09-20 23:00	80m	- / -6	ON5WR	-4 / -	2	✓ Closing fragment
09-20 22:56	80m	-6 / -	KP4AA	- / -	2	Partial capture
09-20 22:15	80m	-22 / -8	IU3WOZ	-2 / +3	3	Partial capture
09-20 22:10	80m	-9 / -5	T77RN	-2 / -	2	Partial capture
09-20 22:02	80m	-20 / -11	VO1HP	-6 / -9	3	✓ Full exchange observed
09-20 21:57	80m	-20 / -	DL4KER	- / -	2	Partial capture
09-20 21:40	80m	-22 / -7	DA6HU	+3 / -16	7	✓ Full exchange observed
09-20 21:37	80m	- / -15	ON4MAP	-4 / -	3	✓ Closing fragment
09-20 21:18	80m	- / -13	DM1YS	-1 / -	2	✓ Closing fragment
09-20 21:14	80m	- / -18	EA5HM	-16 / -	4	✓ Closing fragment
09-20 21:13	80m	- / -14	G6PWS	-11 / -	2	✓ Closing fragment
09-20 20:59	80m	- / -7	IK2ZJP	-6 / -	2	✓ Closing fragment
09-20 20:27	80m	-17 / -20	SO100PKP	+21 / -14	2	Partial capture
09-20 19:57	80m	- / -15	DM1YS	+6 / -	5	✓ Closing fragment
09-20 19:49	80m	-24 / -22	DL1NEO	+14 / -	3	✓ Closing observed
09-20 19:22	80m	-21 / -22	DO1MYK	-4 / -16	4	Partial capture
09-20 19:12	80m	- / -10	IK5NQI	-2 / -	2	✓ Closing fragment
09-20 06:05	80m	- / -9	DL1BTX	+8 / -	2	✓ Closing fragment
09-20 05:20	80m	- / -18	DO3VE	-3 / -	5	Partial capture
09-20 05:09	80m	- / -	F5OAM	-12 / -	2	✓ Closing fragment
09-20 05:03	80m	-24 / -13	DO5PY	-5 / -17	8	✓ Full exchange observed
09-20 04:54	80m	-14 / -	SV1PMQ	- / -	2	Partial capture
09-20 04:45	80m	-8 / -	F5OAM	- / -	2	Partial capture
09-20 04:42	80m	-13 / -	DJ2PW	-3 / -5	2	Partial capture
09-20 04:36	80m	-9 / -3	EA2DYB	-11 / +2	5	✓ Full exchange observed
09-20 04:30	80m	-8 / -2	YO2CK	+18 / +1	7	✓ Full exchange observed
09-20 04:26	80m	-14 / -19	DO3VE	-7 / -	3	Partial capture
09-18 06:20	40m	- / -18	DB26YLBB	+4 / -	2	Partial capture
09-18 06:11	40m	- / -15	MW0USK	-3 / -	4	✓ Closing fragment
09-18 06:06	40m	- / -13	PD1GOL	-14 / -	2	Partial capture
09-18 05:39	40m	- / -1	F4NEM/P	-16 / -	2	✓ Closing fragment
09-18 05:16	60m	- / -6	IK4JPP	-5 / -	2	Partial capture
09-18 05:12	60m	- / -12	9A3ZI	+1 / -	2	✓ Closing fragment
09-18 05:01	60m	- / 0	HB9IOB	-16 / -	2	✓ Closing fragment
09-18 04:58	60m	- / -3	F1TFT	0 / -	2	✓ Closing fragment
09-18 04:57	60m	-22 / +2	DG1KFR	-2 / -17	3	✓ Full exchange observed
09-18 04:34	60m	-22 / -	KJ8H	- / -	2	Partial capture
09-18 04:32	60m	-21 / -	II9IAGM	- / -15	2	Partial capture
09-18 04:30	60m	-8 / -	F6ICX	+1 / -	3	✓ Closing observed
09-18 04:20	40m	- / -15	IZ8CLM	-14 / -	3	✓ Closing fragment
09-17 22:23	40m	-13 / -9	DG7DBM	-22 / -	2	Partial capture
09-17 21:51	40m	- / -6	G0COG	-19 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
044430 -16 1188  EC3A EA3ISZ 73
044500 -18 1188  F4LRA EA3ISZ JN01 (x2)
044715 -11 1405  EA3ISZ F4LRA -08 (x3)
044900 -16 1188  F4LRA EA3ISZ 73
045030 -18 1353  CQ EA3ISZ JN01 (x2)
045630  +3  650  EA3ISZ IZ0SQZ JN62
050615 -17  822  EA3ISZ M0KHR -10 (x3)
051115 -14 1294  CQ EA3ISZ JN01
051330 +21  644  EA3ISZ SN40KZE -22

40m

UTC    dB Audio  Message
222445 -22  216  EA3ISZ DG7DBM -09
042030 -17 2060  EA3ISZ IZ8CLM -15 (x3)
053800 -15 1332  EA3ISZ IS0AAS +01
053900 -14 2291  EA3ISZ F4NEM/P -01 (x2)
060600 -13 1954  EA3ISZ PD1GOL -13 (x2)
061145  -1  973  EA3ISZ MW0USK -15 (x4)
062030  +3 2067  EA3ISZ DB26YLBB -18 (x2)

60m

UTC    dB Audio  Message
045015 -20 1680  CQ EA3ISZ JN01 (x2)
045715  +0 2234  EA3ISZ DG1KFR +02
045730 -22 1679  DG1KFR EA3ISZ R-17
045745  -4 2235  EA3ISZ DG1KFR RR73
045845  +0  737  EA3ISZ F1TFT -03 (x2)
050130 -16 1585  EA3ISZ HB9IOB +00 (x2)
050800  +0  624  EA3ISZ F6ICX +10
051230  +3 1322  EA3ISZ 9A3ZI -12 (x2)
051645  -6 1180  EA3ISZ IK4JPP -06 (x3)

20m

UTC    dB Audio  Message
044600  -1 1278  EA3ISZ LZ7VV RR73
071730  -6 1674  EA3ISZ ON1DGN -17 (x3)
173500  -6 1532  EA3ISZ II7MGXX +01
175415 -11  550  RI1FJL EA3ISZ JN01 (x7)
182015 -14  276  G7MYR EA3ISZ R-07 (x3)

10m

UTC    dB Audio  Message
153930  -1  460  EA3ISZ F5NAA RR73 (x3)
191730  -6  657  EA3ISZ DN9DKN JO31 (x5)
194430  -9 1207  EA3ISZ ON7VZ -01 (x2)
195000 -23 1689  EA3ISZ PD2NBE -13 (x3)
200330  -5  846  EA3ISZ G1OZO -11 (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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