K4YJ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Locator transmitted in a decoded message: EM88

Receiver-side FT8 activity involving K4YJ, decoded by SO8OO in southeastern Poland. 682 related FT8 messages, 2 CQ messages, observed on 80m, 60m, 40m, 20m, 10m, across 29 UTC dates. Heard between 2026-05-25 and 2026-08-22.

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

682

Related messages

CQ messages

UTC dates heard

-10 dB

Mean decoder S/N

Bands

80m 20m 40m 60m 10m

First seen: 2026-05-25
Last seen: 2026-08-22 04:02 UTC

Frequent QSO partners observed at SO8OO

Stations K4YJ worked most often, as logged from our receiver:

9A5E · Croatia ×2 IT9VCE · Sicily ×2 9K2GR · Kuwait ×2 HB9EFK · Switzerland ×2 PY7XC · Brazil ×2 YO6LM · Romania DN4TG · Fed. Rep. of Germany DK6WH · Fed. Rep. of Germany EP5TJS · Iran SP5HQZ · Poland 4X4DK · Israel M9YLR · England

Activity Heatmap

Locator transmitted by K4YJ

Approximate centre of EM88, decoded 2026-08-12 03:15 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	K4YJ S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-22 02:35	40m	- / +1	NA3M	-11 / -	2	✓ Closing fragment
08-22 01:44	40m	- / -23	EI2IXB	-12 / -	3	Partial capture
08-22 01:07	40m	- / -1	K0EOO	-8 / -	3	✓ Closing fragment
08-22 00:34	40m	- / -13	YV5JDP	-10 / -	2	✓ Closing fragment
08-22 00:19	40m	- / +7	KB1HY	-10 / -	2	✓ Closing fragment
08-22 00:11	40m	- / -18	EA1AUO	-4 / -	3	Partial capture
08-22 00:04	40m	- / -4	N1TQP	-2 / -	3	Partial capture
08-17 22:27	20m	- / -4	9K2GR	-6 / -	2	✓ Closing fragment
08-17 22:13	20m	- / -8	EA3AKY	-7 / -	3	✓ Closing fragment
08-17 21:35	20m	- / -13	EA3NE	+16 / -	2	Partial capture
08-15 03:27	20m	- / -10	5B4AMX	-12 / -	2	Partial capture
08-12 04:09	80m	-22 / -	S53R	+14 / -5	2	✓ Closing observed
08-12 03:29	80m	- / -	DL8MKG	+16 / -	2	Partial capture
08-12 03:22	80m	- / -17	DG1KPC	+5 / -	3	Partial capture
08-12 03:12	80m	- / +2	AJ4BH	-17 / -	4	Partial capture
08-12 02:37	80m	- / -	DL8MKG	+18 / -	2	Partial capture
08-12 02:05	80m	- / -2	N1PTM	-22 / -	3	Partial capture
08-12 01:58	80m	- / -16	LA1AAA	+14 / -	3	✓ Closing fragment
08-12 01:38	80m	- / -	W1NB	-10 / -	5	Partial capture
08-12 01:32	80m	- / -24	PI4DX	+8 / -	2	✓ Closing fragment
08-08 03:48	40m	- / -7	ON8LX	-16 / -	2	✓ Closing fragment
08-08 03:42	40m	- / -16	PD0TVA	-9 / -	3	✓ Closing fragment
08-08 03:28	40m	- / -13	PA4G	-16 / -	2	✓ Closing fragment
08-08 02:14	40m	- / -9	9K2GR	-17 / -	2	✓ Closing fragment
08-08 01:48	40m	- / -9	IW0RQJ	-3 / -	5	✓ Closing fragment
08-08 01:27	40m	- / -11	IW0RQJ	-2 / -	5	Partial capture
08-08 01:22	40m	- / -8	CT3MD	-18 / -	2	Partial capture
08-08 00:59	40m	- / -10	IU2SLI	-11 / -	2	✓ Closing fragment
08-08 00:38	40m	- / -8	DH5BM	-15 / -	3	✓ Closing fragment
08-08 00:36	40m	- / -7	DB2GM	-8 / -	2	✓ Closing fragment
08-08 00:27	40m	- / -18	UR7FM	-1 / -	2	✓ Closing fragment
08-08 00:25	40m	- / -3	F4DVO	-8 / -	2	✓ Closing fragment
08-08 00:18	40m	- / -3	DB5HA	-21 / -	2	Partial capture
08-07 02:53	80m	-22 / -	T45FCR	- / -	2	Partial capture
08-07 02:33	40m	- / -17	US5EAA	-16 / -	2	✓ Closing fragment
08-05 02:36	40m	- / -19	YO6LM	-12 / -	3	✓ Closing fragment
08-04 05:48	60m	- / -14	F8NHF	-2 / -	10	✓ Closing fragment
08-04 05:09	60m	- / -	IK8HJC	+3 / -	3	Partial capture
08-04 05:03	60m	- / -15	DL3MIB	-3 / -	8	✓ Closing fragment
08-04 04:55	60m	- / -	F5NLY	-17 / -	4	Partial capture
08-04 04:11	60m	- / -15	G4ATX	-11 / -	2	✓ Closing fragment
08-04 04:09	60m	- / -	HB9DGK	-2 / -	5	Partial capture
08-04 03:03	80m	- / -14	DL1STG	+10 / -	2	✓ Closing fragment
08-04 02:51	80m	-24 / -	OZ5NJ	- / -	2	Partial capture
08-04 02:30	80m	- / +1	VP2MAA	-16 / -	2	✓ Closing fragment
08-04 02:07	40m	- / -24	9K2YM	-6 / -	4	✓ Closing fragment
08-03 04:38	80m	- / -	ON8DM	-8 / -	2	✓ Closing fragment
08-03 03:54	80m	- / -22	F4DIA	-18 / -	2	✓ Closing fragment
08-03 03:24	80m	- / -4	I4JED	+9 / -	2	✓ Closing fragment
08-03 03:22	80m	- / -17	HB9FLU	-2 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
003445  -9  832  K4YJ YV5JDP -13 (x2)
010345  -7  481  K4YJ AD8FD RR73
010745  -8  488  K4YJ K0EOO -01 (x3)
013215 -20 1177  K4YJ VE3NKS RR73
014415 -14  263  K4YJ EI2IXB -23 (x3)
014815 -11 1780  K4YJ OS4K -14
023545 -12 1675  K4YJ NA3M +01
023615 -20 2170  K4YJ YV5AEZ FK60
023615 -10 1675  K4YJ NA3M RR73
060215 -16 1669  K4YJ F4ENK RR73

20m

UTC    dB Audio  Message
070445 -20 1877  K4YJ PD0WL JO21
070545 -11 1984  K4YJ ON3MV JO21 (x2)
071100 -22 2081  RL2F K4YJ 73
032700 -12 1779  K4YJ 5B4AMX -10 (x2)
213530 +14  507  K4YJ EA3NE -13 (x2)
221300  -6 1214  K4YJ EA3AKY -08 (x3)
222700  -4 2034  K4YJ 9K2GR -04 (x2)
224930 -14  909  K4YJ PD1SL RR73
055100 -17 1267  K4YJ F5SZB IN95

80m

UTC    dB Audio  Message
023030 -17  553  K4YJ K5WBM RR73
023700 +18 2609  K4YJ DL8MKG JO52 (x2)
031200 -15  998  K4YJ AJ4BH +02 (x4)
031545 -17 2472  N7LL K4YJ EM88
032200  +5 1574  K4YJ DG1KPC JO30 (x3)
032900 +17 2537  K4YJ DL8MKG JO52 (x2)
040930 +14  515  K4YJ S53R RR73
040945 -22  516  S53R K4YJ -05

60m

UTC    dB Audio  Message
050715  +0 1064  K4YJ DL3MIB R-15 (x2)
050945  +6  475  K4YJ IK8HJC JN70 (x3)
054845  -2 1404  K4YJ F8NHF JO10 (x10)

10m

UTC    dB Audio  Message
144545  +1 2489  K4YJ PY7XC -11 (x2)
195445 -16 1564  K4YJ PV8AJ -06 (x4)
214115  +0 2590  K4YJ CE2SV -19 (x3)

Decoder S/N history by band

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