EA4BU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Spain Most frequent locator attributed to this token: IN80

Receiver-side FT8 activity involving EA4BU, decoded by SO8OO in southeastern Poland. 169 FT8 messages attributed to this token as transmitter, on 20m, across 11 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-08-11.

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 169 FT8 messages attributed to EA4BU as the transmitting token by decoded message structure across 11 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 (72%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.

Overview

169

Messages attributed

UTC dates decoded

Active 15-min windows

-14 dB

Estimated median S/N

Bands

20m · 169

First attributed message: 2026-06-08
Last attributed message: 2026-08-11 09:39 UTC

Observed FT8 message patterns

Attributed sample: 169 messages
Active dates: 11 UTC dates
Estimated median S/N: -14 dB
Estimated 10th-90th percentile: -19 to -5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 62, moderate (-15 to -9 dB) 68, strong (≥ -8 dB) 39.

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 EA4BU in decoded directed-looking exchanges:

IK4LZH · Italy ×2 DN9DZ · Fed. Rep. of Germany PD1HPB · Netherlands 2E0ROJ · England 4X1UF · Israel 9H4CM · Malta A71UN · Qatar BG4UCZ · China BG7BMG · China BG7WJH · China BH4ECL · China BI4JJO · China

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 EA4BU

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: IN80 · 78 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,193 km (approx.)
Last such locator decoded: 2026-08-11 09:39 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	EA4BU S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-11 09:38	20m	-17 / -9	DK5OPA	-11 / -5	4	✓ Full exchange observed
08-11 09:36	20m	-22 / -	CR5VP	- / -10	3	✓ Closing fragment
08-10 11:20	20m	- / -9	IK4LZH	+6 / -	2	✓ Closing fragment
08-10 11:04	20m	- / -	IK4LZH	+6 / -	3	Partial capture
08-10 11:02	20m	- / +4	IU2THY	-9 / -	2	Partial capture
08-07 19:16	20m	-10 / -	CX6TU	- / -	2	Partial capture
08-07 19:12	20m	- / -1	LA6RJA	-7 / -	2	✓ Closing fragment
08-07 19:10	20m	-12 / -	PD0RCQ	- / -2	2	✓ Closing fragment
08-07 19:07	20m	- / -	M1FHD	-10 / -	4	Partial capture
08-07 19:03	20m	-9 / -	BH4ECL	- / -15	5	✓ Closing fragment
08-07 19:02	20m	-14 / -	RD3FY	- / -8	2	✓ Closing fragment
08-07 06:53	20m	-14 / -	VK2AAI	- / -	2	Partial capture
08-07 06:45	20m	-16 / -	9H4CM	- / -	2	Partial capture
08-07 06:25	20m	-16 / -	5Z4VJ	- / -14	2	Partial capture
08-07 06:18	20m	-17 / -7	P40AA	-14 / +8	2	Partial capture
08-06 18:58	20m	-11 / -	LB5CK	- / -22	3	✓ Closing fragment
08-06 18:56	20m	-9 / -	BV2NF	- / -16	3	✓ Closing fragment
08-06 18:40	20m	-7 / -3	2E0ROJ	-9 / -	8	✓ Closing observed
08-06 18:37	20m	- / -18	R1QD	-16 / -	2	✓ Closing fragment
08-06 18:37	20m	-13 / -	RC5F	- / 0	2	Partial capture
08-06 18:31	20m	-14 / -	PD2WL	- / -6	2	Partial capture
08-06 18:28	20m	-13 / -	PA1AMS	- / -15	2	Partial capture
08-06 18:28	20m	- / -	RC5F	-16 / -	2	Partial capture
08-06 11:46	20m	- / -13	F1PBZ	-7 / -	3	✓ Closing fragment
08-04 18:48	20m	- / -10	UT4QM	-11 / -	3	✓ Closing fragment
08-04 18:37	20m	- / -11	RA6OY	-3 / -	5	✓ Closing fragment
07-22 06:16	40m	- / -	DA1ST	-16 / -	5	Partial capture
07-18 06:43	20m	- / 0	IK4LZH	-3 / -	3	✓ Closing fragment
07-17 11:15	20m	- / +1	PE9JAN	-6 / -	6	✓ Closing fragment
07-17 06:53	20m	- / -6	PC2J	-16 / -	2	Partial capture
07-16 20:36	20m	-16 / -	JH8SIT	- / -24	3	✓ Closing fragment
07-16 20:28	20m	-17 / -	BH2WTV	- / -	2	Partial capture
07-16 20:17	20m	-17 / -	JA4WLF	- / -20	5	Partial capture
07-16 20:13	20m	-17 / -	N1ECC	- / -21	2	✓ Closing fragment
07-16 20:09	20m	-14 / -	KF0YOB	- / -	2	Partial capture
07-16 20:08	20m	-16 / -	4X1UF	- / -11	2	✓ Closing fragment
07-16 20:06	20m	-16 / -	SQ3MQD	- / -19	2	✓ Closing fragment
07-16 20:05	20m	- / -	G6MTI	-14 / -	2	Partial capture
07-16 20:03	20m	-16 / -	PE1PBQ	- / +3	2	✓ Closing fragment
07-16 19:59	20m	-16 / -	KN4WOJ	- / -18	2	✓ Closing fragment
07-16 19:59	20m	- / -	M7WFZ	-22 / -	2	Partial capture
07-16 19:58	20m	-17 / -	R3ICU	- / -12	2	Partial capture
07-16 19:55	20m	-17 / -	RZ4FWA	- / -14	2	✓ Closing fragment
07-16 19:51	20m	-5 / -	JA6CNL	- / -11	2	✓ Closing fragment
07-16 17:21	20m	- / -18	RN4AD	-3 / -	2	✓ Closing fragment
07-16 11:42	20m	- / -14	DH1FA	-16 / -	2	Partial capture
07-16 11:41	20m	- / -21	EA2DYB	-6 / -	2	✓ Closing fragment
07-15 20:56	20m	-7 / -	TN8GD	- / -14	5	✓ Closing fragment
07-15 20:53	20m	-6 / -	JH1XPA	- / -	2	Partial capture
07-15 20:51	20m	-14 / -	BG7WJH	- / -20	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
112045  +5  462  EA4BU IK4LZH R-09 (x2)
113130 -16 1221  CQ EA4BU IN80 (x5)
093600 -23 1751  CR5VP EA4BU IN80 (x3)
093830 -16 1746  DK5OPA EA4BU -05
093845 -12  565  EA4BU DK5OPA R-09
093900 -18 1745  DK5OPA EA4BU RR73
093915 -10  564  EA4BU DK5OPA 73
093930 -14 1744  CQ EA4BU IN80

10m

UTC    dB Audio  Message
163715  -8 1921  EA4BU DN9SGE JO42 (x4)
164545 -13 1494  EA4BU DF3QX +10
164815  -5  594  EA4BU DN9DZ JO31 (x2)
165345 -20 1533  EA4BU PD0NHM -14
170045 -20 1282  EA4BU EA6SK R-16
171645  -6  595  EA4BU DN9DZ JO31 (x4)
175615 -11  890  EA4BU RD7LO LN06
064645 -14 2380  EA4BU RD7LC -15

40m

UTC    dB Audio  Message
061600 -15 1552  EA4BU DA1ST JO41 (x5)

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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