KJ4EX — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Locator transmitted in a decoded message: EM83

Receiver-side FT8 activity involving KJ4EX, decoded by SO8OO in southeastern Poland. 185 related FT8 messages, 6 CQ messages, observed on 160m, 80m, 40m, 20m, across 11 UTC dates. Heard between 2026-05-25 and 2026-08-23.

These are automated observations at the SO8OO receiver, not the station's official logbook. Times are UTC. Decoder S/N describes messages received at SO8OO; inferred entity and location data may be inaccurate for portable, remote or special-event operation.

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Overview

185

Related messages

CQ messages

UTC dates heard

-3 dB

Mean decoder S/N

Bands

80m 20m 40m 160m

First seen: 2026-05-25
Last seen: 2026-08-23 01:44 UTC

Frequent QSO partners observed at SO8OO

Stations KJ4EX worked most often, as logged from our receiver:

F1PBZ · France ×3 DG4SCG · Fed. Rep. of Germany 9A2L · Croatia SN5JU · Poland DF7DC · Fed. Rep. of Germany DF7GG · Fed. Rep. of Germany IQ4JO · Italy F8NHF · France KF6MIX · United States OZ5TU · Denmark LZ3CB · Bulgaria SV9TLU · Crete

Activity Heatmap

Locator transmitted by KJ4EX

Approximate centre of EM83, decoded 2026-06-03 01:16 UTC. A transmitted locator is not proof of the operator's permanent location.

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	KJ4EX S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-23 03:43	40m	- / -14	DG7NFX	-17 / -	3	✓ Closing fragment
08-23 03:34	40m	- / -18	ES2AJ	+4 / -	2	✓ Closing fragment
08-23 03:26	40m	- / -7	EI4JFB	+4 / -	4	✓ Closing fragment
08-23 03:23	40m	- / -14	ES2AJ	-2 / -	2	Partial capture
08-23 03:21	40m	- / -	EA5HM	-5 / -	2	Partial capture
08-23 03:14	40m	- / -16	F1PBZ	+4 / -	4	✓ Closing fragment
08-20 01:06	80m	- / -18	SN5JU	-5 / -	3	✓ Closing fragment
08-20 01:01	80m	- / -13	F8NHF	+5 / -	4	✓ Closing fragment
08-20 00:57	80m	- / -	EA8AR	-16 / -	3	Partial capture
08-20 00:57	80m	- / -	SN5JU	+6 / -	2	Partial capture
08-20 00:41	40m	- / -16	MM0KQC	-21 / -	4	Partial capture
08-20 00:29	40m	- / -21	IK4LZH	-6 / -	3	✓ Closing fragment
08-20 00:23	40m	- / -12	OS4K	-17 / -	3	Partial capture
08-20 00:13	40m	- / -	ON8FAB	-4 / -	3	Partial capture
08-19 23:50	40m	- / -	DH5BM	-17 / -	7	Partial capture
08-19 23:50	40m	- / -	PD1AC	0 / -	2	Partial capture
08-19 23:47	40m	- / -19	ON1JP	-16 / -	4	Partial capture
07-27 04:22	40m	- / -17	9A2L	-11 / -	4	✓ Closing fragment
07-27 04:05	40m	- / -7	DK9RC	-4 / -	2	Partial capture
07-27 04:00	40m	- / -	DK9RC	-8 / -	3	Partial capture
07-27 03:47	40m	- / -10	DG4SCG	-14 / -	2	✓ Closing fragment
07-27 03:38	40m	- / -	DG4SCG	-12 / -	3	Partial capture
07-27 03:20	80m	- / -25	DF7DC	+12 / -	2	✓ Closing fragment
07-27 03:14	80m	- / -21	DO9BAU	+3 / -	4	✓ Closing fragment
07-27 02:59	80m	- / -	DO9BAU	+9 / -	11	Partial capture
07-22 02:57	80m	- / -14	SV8JE	+19 / -	2	✓ Closing fragment
07-22 02:45	80m	- / -9	DL3QC	+5 / -	4	✓ Closing fragment
07-22 02:45	80m	- / -21	DO9BAU	+6 / -	16	Partial capture
07-22 02:43	80m	- / -13	F1PBZ	+12 / -	2	✓ Closing fragment
06-16 02:48	40m	- / -10	OZ5TU	+6 / -	2	✓ Closing fragment
06-16 02:44	40m	- / -	YO8RSL	-14 / -	2	Partial capture
06-16 02:42	40m	- / -13	LA9GX	+4 / -	2	✓ Closing fragment
06-03 04:07	40m	- / -	IK4LZH	+4 / -	4	Partial capture
06-03 04:00	40m	- / -	HB9ZHK	-13 / -	3	Partial capture
06-03 03:57	40m	- / 0	G8MIA	-7 / -	3	✓ Closing fragment
06-03 03:49	40m	- / -	G8OO	-8 / -	2	✓ Closing fragment
06-03 03:43	40m	- / -	G8OO	-4 / -	3	Partial capture
06-03 03:43	40m	- / -9	DL5LV	+8 / -	6	✓ Closing fragment
06-03 03:43	40m	- / -14	F4NGR	-14 / -	3	✓ Closing fragment
06-03 03:43	40m	- / -	YO4FZV	-5 / -	3	Partial capture
06-03 03:39	40m	- / -9	ON6AA	+6 / -	2	Partial capture
06-03 01:11	20m	-16 / -14	DF7GG	-18 / -7	5	✓ Full exchange observed
06-03 01:11	20m	-15 / -19	7Z1DM	-8 / -13	4	✓ Full exchange observed
06-03 01:08	20m	-12 / -	NC4MH	- / +6	2	✓ Closing fragment
06-03 01:03	20m	-14 / -	SP6AXW	- / -8	2	✓ Closing fragment
06-03 01:01	20m	-10 / -5	IQ4JO	+8 / -4	4	✓ Full exchange observed
06-03 00:59	20m	-10 / -	F1PBZ	- / -1	2	✓ Closing fragment
06-03 00:56	20m	-15 / -	IZ8EYN	- / -25	2	Partial capture
06-03 00:56	20m	- / -16	RK4FF	-8 / -	2	Partial capture
06-03 00:48	20m	-17 / -	KF6MIX	- / -8	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
032230  -6 1578  KJ4EX EA5HM IM99
032300 -11 1326  KJ4EX DG4BZ JO42
032330  -5 1595  KJ4EX ES2AJ -14 (x2)
032630  +7  492  KJ4EX EI4JFB IO63 (x2)
032700  +1 2510  KJ4EX F4JJA JN09
032730  +4  492  KJ4EX EI4JFB R-07 (x2)
033445  +6 1595  KJ4EX ES2AJ -18 (x2)
033915  +0  850  KJ4EX LZ3CB 73
034300 -21 2143  KJ4EX DG7NFX JN59 (x3)

20m

UTC    dB Audio  Message
010915 -12 1282  HB9TIH KJ4EX -01
010945 -10 1282  NC4MH KJ4EX RR73
011100  -8 1281  KJ4EX 7Z1DM -19
011115 -16 1282  DF7GG KJ4EX -07
011130  -8 1281  KJ4EX 7Z1DM -19
011145 -15 1282  DF7GG KJ4EX -07
011300 -17 2200  KJ4EX DF7GG R-14
011315 -15 1282  7Z1DM KJ4EX R-13
011330 -18 2200  KJ4EX DF7GG R-14
011345 -17 1282  DF7GG KJ4EX RR73
011400  -7 1282  KJ4EX 7Z1DM RR73
011415 -15 1282  CP7DX KJ4EX EM83
011645 -15 1201  KQ4ZIP KJ4EX EM83 (x2)
025115 -19 2441  KJ4EX IU0VOG JN61

80m

UTC    dB Audio  Message
032030 +11 1101  KJ4EX DF7DC -25 (x2)
005730  +3 1678  KJ4EX SN5JU JO73
005745 -16 1750  KJ4EX EA8AR IL18
005800 +10 1678  KJ4EX SN5JU JO73
005815 -15 1750  KJ4EX EA8AR IL18 (x2)
010100  -3 1678  KJ4EX SN5JU JO73
010130  +3  402  KJ4EX F8NHF JO10 (x4)
010630  -4 1678  KJ4EX SN5JU JO73 (x3)

160m

UTC    dB Audio  Message
003700  +5 1428  KJ4EX 9A4ZM JN86 (x2)

Decoder S/N history by band

Daily averages across messages associated with this profile as decoded at SO8OO.