4X1FK — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Israel Most frequent locator attributed to this token: KM71

Receiver-side FT8 activity involving 4X1FK, decoded by SO8OO in southeastern Poland. 368 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 44 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-06.

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 368 FT8 messages attributed to 4X1FK as the transmitting token by decoded message structure across 44 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (83%), followed by 80 m (12%) and 40 m (5%). Several six-hour UTC windows tied for the largest share (87%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10.3 dB.

Overview

368

Messages attributed

UTC dates decoded

Active 15-min windows

-10.3 dB

Estimated median S/N

Bands

80m · 45 40m · 18 20m · 305

First attributed message: 2026-06-07
Last attributed message: 2026-09-06 03:15 UTC

Observed FT8 message patterns

Attributed sample: 368 messages
Active dates: 44 UTC dates
Estimated median S/N: -10.3 dB
Estimated 10th-90th percentile: -20 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 100, moderate (-15 to -9 dB) 112, strong (≥ -8 dB) 156.

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 4X1FK in decoded directed-looking exchanges:

9A3AUH · Croatia HK4J · Colombia IU5AWQ · Italy K2RET · United States KC1EPL · United States KF0YOB · United States KV4JL · United States N5CH · United States OK1WCF · Czech Republic SQ1DOZ · Poland W2KOT · United States W4JHV · United States

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 4X1FK

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: KM71 · 274 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,325 km (approx.)
Last such locator decoded: 2026-09-06 03:14 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	4X1FK S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-06 03:17	40m	- / -	F5PBG	+2 / -	2	Partial capture
09-06 03:16	40m	- / -	EC4DJB	-16 / -	2	Partial capture
09-06 03:14	40m	-12 / -	HP/WE9G	- / -4	3	Partial capture
09-06 03:02	40m	-11 / -	OA4ENG	- / -	15	Partial capture
09-01 03:56	60m	- / -	F6AOJ	+1 / -	3	Partial capture
08-30 06:33	20m	-23 / -	SQ1DOZ	- / -9	2	✓ Closing fragment
08-28 03:41	20m	+2 / -	KC8ZKS	- / -	5	Partial capture
08-27 03:24	20m	-4 / -15	K2RET	-11 / -5	9	✓ Full exchange observed
08-27 03:21	20m	+3 / -	XQ1KK	- / -	3	Partial capture
08-26 03:36	20m	-12 / -	5N0YEN	- / -	3	Partial capture
08-26 03:33	20m	-7 / -	W2KOT	- / -22	4	✓ Closing fragment
08-25 03:02	20m	-18 / -24	VE3LA	-20 / -16	10	Partial capture
08-22 03:58	20m	-2 / -	ZL1PB	- / -	9	Partial capture
08-21 18:57	80m	- / -	YO4FRF	-4 / -	2	Partial capture
08-21 18:51	80m	-15 / -15	DO5HOK	-9 / -	3	✓ Closing observed
08-07 03:41	20m	-22 / -	CT3MD	- / -	3	Partial capture
08-07 03:36	20m	-8 / -	N5CH	- / -13	2	✓ Closing fragment
08-07 03:30	20m	-8 / -	N5CH	- / -	3	Partial capture
08-06 03:42	20m	-20 / -	ZL3JT	- / -	4	Partial capture
08-06 03:37	20m	-5 / -	HC5F	- / -	4	Partial capture
08-02 03:26	20m	+1 / -	N1NRL	- / -	3	Partial capture
07-31 03:37	20m	-21 / -	KD2YCK	- / -	6	Partial capture
07-28 03:43	20m	-19 / -	K9STL	- / -	3	Partial capture
07-27 18:33	80m	-7 / -7	IW4EGP	+4 / -	4	✓ Full exchange observed
07-27 18:28	80m	- / -15	OE1TKS	+2 / -	2	✓ Closing fragment
07-26 03:28	20m	-17 / -	EX8ABR	- / -17	3	Partial capture
07-24 19:06	20m	- / -	DB9LG	-3 / -	7	Partial capture
07-19 03:25	20m	-18 / -	W1YY	- / -	4	Partial capture
07-17 19:20	80m	-15 / -4	SV1HBS	+1 / -	4	✓ Closing observed
07-17 19:12	80m	-14 / -8	OH1CIN	0 / -	11	✓ Closing observed
07-17 04:01	20m	-18 / -	KF0YOB	- / -17	4	✓ Closing fragment
07-16 03:23	20m	-16 / -	HP2NG	- / -	2	Partial capture
07-16 03:21	20m	-20 / -	VE2OPR	- / -	3	Partial capture
07-16 03:15	20m	-14 / -	HI8ARJ	- / -	6	Partial capture
07-15 03:43	20m	-8 / -	W5ZG	- / -2	2	✓ Closing fragment
07-09 18:03	20m	-5 / -	MI0JZZ	- / -	2	Partial capture
07-09 04:07	20m	-19 / -	KC1EPL	- / -21	3	✓ Closing fragment
07-09 03:22	20m	-12 / -	<...>	- / -	6	Partial capture
07-08 03:40	20m	-23 / -	K0C	- / -	3	Partial capture
07-08 03:35	20m	-4 / -	KE2FUM	- / -24	2	Partial capture
07-08 03:34	20m	- / -	HB9TIH	-17 / -	3	Partial capture
07-06 18:18	80m	-11 / -	DL6EBV	- / -	3	Partial capture
07-06 18:17	80m	- / -6	US8UX	+12 / -	3	✓ Closing fragment
07-06 18:15	80m	-13 / -	RN6MA	-6 / -1	3	✓ Closing observed
07-05 03:11	20m	-12 / -	KT5AC	- / -	3	Partial capture
07-02 18:46	80m	-20 / -15	UR5RBP/A	+7 / -16	2	Partial capture
07-02 18:40	80m	-15 / -16	OK2CLW	+11 / -10	5	✓ Full exchange observed
07-02 18:35	80m	-12 / -6	RD7O	+5 / -	4	✓ Full exchange observed
07-02 18:32	80m	-14 / -16	IQ4JO	-1 / -8	4	✓ Full exchange observed
06-30 15:08	10m	- / -16	F4GPK	+1 / -	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
030645 -11 2487  OA4ENG 4X1FK KM71 (x8)
031415 -10 2708  HP/WE9G 4X1FK KM71 (x3)
031630 -18 2072  4X1FK EC4DJB IN80
031700  +2 2758  4X1FK F5PBG IN78
031700 -15 2072  4X1FK EC4DJB IN80
031730  +2 2758  4X1FK F5PBG IN78

60m

UTC    dB Audio  Message
035600  +2 1917  4X1FK F6AOJ JN08 (x3)

20m

UTC    dB Audio  Message
032600  -3 1517  K2RET 4X1FK KM71 (x3)
032715 -11 1516  4X1FK K2RET -15
032730  -4 1516  K2RET 4X1FK R-05 (x2)
034130  +2  669  KC8ZKS 4X1FK KM71 (x5)
062215  -2 2172  O21 4X1FK KM7
062230 -21  850  4X1FK IU5RPJ -15
063330 -24 1744  SQ1DOZ 4X1FK R-09 (x2)

80m

UTC    dB Audio  Message
192115  +3  887  4X1FK SV1HBS R-04
192130 -15  886  SV1HBS 4X1FK RR73
192145  +1  887  4X1FK SV1HBS 73
182830  +4 1342  4X1FK OE1TKS -15 (x2)
183330  -7 2904  IW4EGP 4X1FK KM71
183345  -1 2904  4X1FK IW4EGP -07
183400  -7 2903  IW4EGP 4X1FK R+13
183415  +8 2904  4X1FK IW4EGP RR73
185130 -15  807  DO5HOK 4X1FK KM71
185145  -8  808  4X1FK DO5HOK -15 (x2)
185715  -3 2095  4X1FK YO4FRF KN44 (x2)
185915 -18 1695  4X1FK EN35UKR -15

10m

UTC    dB Audio  Message
150845  -2 2922  4X1FK F4GPK JN09 (x3)

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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