EA7CU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Spain Most frequent locator attributed to this token: IM86

Receiver-side FT8 activity involving EA7CU, decoded by SO8OO in southeastern Poland. 80 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 11 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-08-27.

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 80 FT8 messages attributed to EA7CU 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 (79%), followed by 10 m (21%). Several six-hour UTC windows tied for the largest share (36%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

20m · 63 10m · 17

First attributed message: 2026-06-08
Last attributed message: 2026-08-27 11:45 UTC

Observed FT8 message patterns

Attributed sample: 80 messages
Active dates: 11 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -22 to -4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 30, moderate (-15 to -9 dB) 19, strong (≥ -8 dB) 31.

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 EA7CU in decoded directed-looking exchanges:

EA3AGF · Spain G8WIL · England PD1HBL · Netherlands PD3LKN · Netherlands UX7QV · Ukraine ON1DGN · Belgium Z68PX · Republic of Kosovo HB9ACA · Switzerland EB5RCA · Spain

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 EA7CU

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: IM86 · 33 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,484 km (approx.)
Last such locator decoded: 2026-08-27 11:45 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	EA7CU S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-14 05:54	60m	- / -14	HB9ACA	-18 / -	4	✓ Closing fragment
09-09 06:54	40m	- / -9	ON1DGN	-16 / -	3	✓ Closing fragment
09-09 06:27	40m	- / -4	Z68PX	-6 / -	2	✓ Closing fragment
09-09 06:11	40m	- / -	UF2F	-18 / -	2	Partial capture
08-27 11:08	20m	-11 / -	RI1FJL	- / -	2	Partial capture
08-27 08:48	20m	-8 / -	NL8F	- / -	4	Partial capture
08-27 08:17	20m	- / -18	PD3LKN	+4 / -	5	✓ Closing fragment
08-27 07:19	20m	-4 / -	UX7QV	- / -17	2	✓ Closing fragment
08-27 07:18	20m	- / -	F4HSB	-3 / -	4	Partial capture
08-25 19:51	20m	- / -6	G8WIL	+2 / -	2	✓ Closing fragment
08-09 18:24	20m	- / -	S58S	-22 / -	2	Partial capture
07-31 09:49	20m	-20 / -	TA3TER	- / -	7	Partial capture
07-31 09:32	20m	-18 / -	TA3TER	- / -	3	Partial capture
07-30 09:26	10m	-15 / -3	EB3EFU	-14 / -	2	Partial capture
07-15 14:51	20m	-6 / -	DL1R	- / -14	8	Partial capture
06-30 08:28	10m	- / -	F4BJN	-14 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
055430 -19 2033  EA7CU HB9ACA -14 (x4)

40m

UTC    dB Audio  Message
061130 -19  293  EA7CU UF2F JO94 (x2)
062700  -8  344  EA7CU Z68PX R-04 (x2)
065430 -18 1487  EA7CU ON1DGN -09 (x3)

20m

UTC    dB Audio  Message
071930  -5 1155  UX7QV EA7CU RR73
071945  +4 1747  EA7CU F4HSB JN37
081715  +4 1481  EA7CU PD3LKN JO22 (x5)
084830  -8 1483  NL8F EA7CU IM86 (x5)
110800 -11 1940  RI1FJL EA7CU IM86 (x3)

80m

UTC    dB Audio  Message
190300  +0 2406  EA7CU R6ODC KN87
190430 -15 2406  EA7CU EB5RCA 73

10m

UTC    dB Audio  Message
082815 -13 1896  EA7CU EA3AYQ R-02
082845 -14 1899  EA7CU F4BJN JN25 (x2)
082930 -24 1391  EA6DL EA7CU -06
091345 -21 2143  ON1KF EA7CU IM86
091615 -23 1269  EA3EAT EA7CU IM86
092645 -14  884  EA7CU EB3EFU -03
092700 -15  884  EB3EFU EA7CU IM86

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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