K4EA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EM74

Receiver-side FT8 activity involving K4EA, decoded by SO8OO in southeastern Poland. 38 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 5 UTC dates in the available aggregate history. Observed between 2026-09-01 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 38 FT8 messages attributed to K4EA as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (95%), followed by 80 m (5%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (87%); the estimated median was -3 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-3 dB

Estimated median S/N

Bands

80m · 2 40m · 36

First attributed message: 2026-09-01
Last attributed message: 2026-09-21 23:18 UTC

Observed FT8 message patterns

Attributed sample: 38 messages
Active dates: 5 UTC dates
Estimated median S/N: -3 dB
Estimated 10th-90th percentile: -10 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 3, strong (≥ -8 dB) 33.

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 K4EA in decoded directed-looking exchanges:

DN9OPA · Fed. Rep. of Germany 4X5MZ · Israel 9K2WA · Kuwait A61DD · United Arab Emirates YN1ZGN · Nicaragua R6OG · European Russia

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 K4EA

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: EM74 · 24 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,198 km (approx.)
Last such locator decoded: 2026-09-21 01:52 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	K4EA S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-21 23:19	40m	- / -	PD0DDA	-6 / -	2	Partial capture
09-21 23:14	40m	-4 / -7	A61DD	-3 / -14	14	✓ Full exchange observed
09-21 01:52	40m	- / -13	UB4CJS	-8 / -	2	Partial capture
09-21 01:50	40m	0 / -	A61DD	- / -	4	Partial capture
09-21 00:10	40m	- / -	EB3JT	-4 / -	6	Partial capture
09-21 00:07	40m	-7 / -	YN1ZGN	- / -13	5	✓ Closing fragment
09-16 02:38	40m	- / -	UA4FKT	-5 / -	2	Partial capture
09-16 02:36	40m	-1 / -5	4X5MZ	+4 / -11	5	✓ Full exchange observed
09-16 02:31	40m	0 / -	9K2WA	-11 / -17	9	✓ Full exchange observed
09-15 00:55	80m	- / -	PA3KUS	-10 / -	4	Partial capture
09-15 00:54	80m	- / -	F4FPR	-17 / -	5	Partial capture
09-15 00:53	80m	-22 / -	R6OG	- / -17	2	✓ Closing fragment
09-01 02:12	40m	-4 / -	RI1FJL	- / -	11	Partial capture
08-26 21:23	10m	- / -24	DN9OPA	-12 / -	7	✓ Closing fragment
08-16 18:22	10m	- / -	RA6BL	-12 / -	2	Partial capture
08-16 18:18	10m	- / -	RA6BL	-9 / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
231500  -4 1227  A61DD K4EA R-14
231515  -2  777  K4EA A61DD -07
231530  -6 1228  A61DD K4EA R-11
231545  -4  777  K4EA A61DD -07
231600  -3 1228  A61DD K4EA R-13
231615  -3  777  K4EA A61DD -07 (x4)
231800  -4 1196  A61DD K4EA R-13
231815  -5  777  K4EA A61DD -07
231830  -4 1197  A61DD K4EA R-13
231845  -4  777  K4EA A61DD RR73
231915  -9 1360  K4EA PD0DDA JO22 (x2)

80m

UTC    dB Audio  Message
005345 -21 1765  R6OG K4EA R-17 (x2)
005430 -21 1765  K4EA F4FPR IN88
005500 -11  959  K4EA PA3KUS JO21
005500 -17 1765  K4EA F4FPR IN88
005530  -7  959  K4EA PA3KUS JO21
005530  -9 1766  K4EA F4FPR IN88
005600 -14  959  K4EA PA3KUS JO21
005600 -23 1766  K4EA F4FPR IN88
005630  -7  959  K4EA PA3KUS JO21
005630 -17 1766  K4EA F4FPR IN88

10m

UTC    dB Audio  Message
181815 -10 1764  K4EA RA6BL KN95 (x5)
212345 -12 2488  K4EA DN9OPA JN38 (x7)

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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