EA3ISA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Spain Most frequent locator attributed to this token: JN00

Receiver-side FT8 activity involving EA3ISA, decoded by SO8OO in southeastern Poland. 17 FT8 messages attributed to this token as transmitter, on 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-08-30.

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 17 FT8 messages attributed to EA3ISA as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -10 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-10 dB

Estimated median S/N

Bands

20m · 17

First attributed message: 2026-06-06
Last attributed message: 2026-08-30 17:28 UTC

Observed FT8 message patterns

Attributed sample: 17 messages
Active dates: 6 UTC dates
Estimated median S/N: -10 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 10, strong (≥ -8 dB) 3.

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 EA3ISA in decoded directed-looking exchanges:

F5RRS · France ×2 CT2HEX · Portugal DC2SF · Fed. Rep. of Germany DL3EBJ · Fed. Rep. of Germany F1PBZ · France F4FSY · France F5ADE · France F5RAV · France G3UAX · England G4DBW · England G5LSI · England IK2IQC · Italy

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 EA3ISA

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: JN00 · 8 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,927 km (approx.)
Last such locator decoded: 2026-08-23 19:14 UTC

Other locator fields attributed to this token: JN01 (1).

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	EA3ISA S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-05 15:47	40m	- / -14	IW4CPU	-3 / -	3	✓ Closing fragment
08-30 17:27	20m	-4 / -14	RK4FF	+24 / -	4	✓ Full exchange observed
08-30 17:13	20m	-11 / -	GM4ZMK	-5 / -25	3	Partial capture
08-30 16:55	40m	- / -10	DH5NC	-6 / -	2	✓ Closing fragment
08-28 17:10	20m	- / -	G8IXM	-9 / -	6	Partial capture
08-28 17:05	40m	- / -	ON3MOH	-5 / -	2	✓ Closing fragment
08-28 17:03	40m	- / -17	DK1GP	0 / -	4	✓ Closing fragment
08-28 17:02	40m	- / -13	OE6TNO	+8 / -	3	✓ Closing fragment
08-24 16:40	20m	- / -17	F5ADE	+1 / -	5	✓ Closing fragment
08-24 15:01	20m	- / -8	DK7NL	-15 / -	3	Partial capture
08-24 11:16	20m	- / -	F6BHK	0 / -	3	Partial capture
08-24 09:08	20m	- / -24	F5RAV	-13 / -	3	✓ Closing fragment
08-24 08:35	20m	- / -9	DL5CG	0 / -	10	Partial capture
08-24 08:27	20m	- / -21	ON7ZJ	-6 / -	4	Partial capture
08-24 08:10	20m	-19 / -	F1PBZ	+4 / -16	2	✓ Closing observed
08-23 19:13	20m	-11 / -	EA8UP	- / -	2	Partial capture
08-23 19:04	20m	- / -14	F4HTA	+16 / -	26	Partial capture
08-23 18:41	20m	- / -12	UR3COE	+8 / -	3	✓ Closing fragment
08-23 18:16	20m	- / -	PD2FT	+6 / -	2	✓ Closing fragment
08-22 11:03	20m	- / -16	IK7EES	+2 / -	2	Partial capture
08-22 09:49	20m	- / -21	IK2XYA	+4 / -	3	✓ Closing fragment
08-22 09:23	20m	- / -6	PD7RF	-4 / -	2	✓ Closing fragment
08-22 08:49	20m	- / -23	PD1AC	-9 / -	3	Partial capture
08-22 08:35	20m	- / -9	ON4AOI	-2 / -	2	✓ Closing fragment
08-20 22:00	20m	- / -22	UW5KW	+6 / -	2	✓ Closing fragment
08-20 18:45	20m	- / -15	UN0GY	0 / -	4	Partial capture
08-20 18:33	20m	- / -	PI4TX	-17 / -	4	Partial capture
08-19 20:26	20m	- / -18	M8HAG	+1 / -	3	✓ Closing fragment
08-19 17:02	20m	- / -10	IZ2DPX	-3 / -	4	✓ Closing fragment
08-19 11:19	20m	- / -9	F4FSY	-22 / -	2	✓ Closing fragment
08-19 10:58	20m	- / -18	F5RRS	-14 / -	2	✓ Closing fragment
08-19 10:41	20m	- / -17	IK2IQC	-12 / -	2	✓ Closing fragment
08-19 10:33	20m	- / -24	IK5EEA	-8 / -	5	✓ Closing fragment
08-19 10:15	20m	- / -21	PD1B	-20 / -	3	Partial capture
08-12 18:39	20m	- / -	F1PPH	-15 / -	2	Partial capture
08-01 18:07	20m	- / -12	G5LSI	+1 / -	3	✓ Closing fragment
08-01 18:04	20m	- / -	SM2SCK	-1 / -	2	Partial capture
07-29 15:16	20m	- / -14	G4DBW	-4 / -	4	✓ Closing fragment
07-29 15:02	20m	- / -21	G0RIF	-1 / -	3	Partial capture
07-25 16:36	20m	- / -6	DH1NGL	-10 / -	2	Partial capture
07-25 16:31	20m	- / -11	DK3WL	-17 / -	3	Partial capture
07-25 16:28	20m	- / -10	M8KKH	-8 / -	2	Partial capture
07-25 16:22	20m	- / -	DG5DR	-9 / -	4	Partial capture
07-21 16:43	20m	- / -20	PD1ADA	-14 / -	4	Partial capture
07-21 16:41	20m	- / -1	SO3K	-9 / -	3	✓ Closing fragment
07-13 18:34	40m	- / -	F5RRS	-16 / -	3	✓ Closing fragment
07-13 18:31	40m	- / -15	SP6ZLT	-2 / -	9	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
161030 -18 2306  EA3ISA S51PV JN76
170245 +10 2807  EA3ISA OE6TNO JN77 (x2)
170315  +2 2666  EA3ISA DK1GP JO30
170345  +9 2807  EA3ISA OE6TNO 73
170345  +2 2666  EA3ISA DK1GP JO30 (x3)
170545  -6 2807  EA3ISA ON3MOH JO10 (x2)
165515  -6 2268  EA3ISA DH5NC R-10 (x2)
154745  -3 2934  EA3ISA IW4CPU JN54 (x3)

20m

UTC    dB Audio  Message
171015  -9  860  EA3ISA G8IXM JO02 (x6)
172000  -9 2862  DC2SF EA3ISA RR73
171345  -5 2893  EA3ISA GM4ZMK IO75
171400 -10 2840  GM4ZMK EA3ISA -25 (x2)
172030  -9 2840  S50TD EA3ISA RR73
172730 +24 2927  EA3ISA RK4FF -14
172745  -3 2928  RK4FF EA3ISA R+15
172800 +24 2927  EA3ISA RK4FF RR73
172815  -5 2928  RK4FF EA3ISA 73

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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