K1SFA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: FN32

Receiver-side FT8 activity involving K1SFA, decoded by SO8OO in southeastern Poland. 306 FT8 messages attributed to this token as transmitter, on 160m, 80m, 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-08-27 and 2026-08-30.

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 306 FT8 messages attributed to K1SFA as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (81%), followed by 160 m (18%) and 20 m (0%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12.2 dB.

Overview

306

Messages attributed

UTC dates decoded

Active 15-min windows

-12.2 dB

Estimated median S/N

Bands

160m · 56 80m · 249 20m · 1

First attributed message: 2026-08-27
Last attributed message: 2026-08-30 03:38 UTC

Observed FT8 message patterns

Attributed sample: 306 messages
Active dates: 4 UTC dates
Estimated median S/N: -12.2 dB
Estimated 10th-90th percentile: -20 to -4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 70, moderate (-15 to -9 dB) 158, strong (≥ -8 dB) 78.

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 K1SFA in decoded directed-looking exchanges:

SP3IOE · Poland ×2 DL3ANK · Fed. Rep. of Germany ×2 DL3HN · Fed. Rep. of Germany ×2 DO1DX · Fed. Rep. of Germany ×2 IQ4JO · Italy ×2 LZ1GC · Bulgaria ×2 OK1UOZ · Czech Republic ×2 OK1WE · Czech Republic ×2 OK1ZCF · Czech Republic ×2 UR5SG · Ukraine ×2 AF4HS · United States DF6PW · Fed. Rep. of Germany

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 K1SFA

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: FN32 · 90 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 6,837 km (approx.)
Last such locator decoded: 2026-08-30 03:38 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	K1SFA S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-30 06:04	80m	- / -13	ON1JP	-24 / -	2	Partial capture
08-30 05:55	80m	- / -	F4BYA	-2 / -	2	Partial capture
08-30 05:51	80m	- / -4	EI4KF	-8 / -	2	✓ Closing fragment
08-30 05:43	80m	- / -	F4BYA	+1 / -	3	Partial capture
08-30 05:01	20m	- / -7	VK2BGL	-14 / -	2	✓ Closing fragment
08-30 04:31	160m	- / -	S54L	-13 / -	2	Partial capture
08-30 04:26	160m	- / -	S54L	-16 / -	4	Partial capture
08-30 04:14	160m	- / -6	DG0OBU	-18 / -	2	Partial capture
08-30 03:59	160m	- / -	DG0JK	-5 / -	3	✓ Closing fragment
08-30 03:55	160m	- / -	S53F	+2 / -	2	✓ Closing fragment
08-30 03:51	160m	- / -1	DF6PW	+6 / -	4	✓ Closing fragment
08-30 03:43	160m	- / -9	F5RQQ	-2 / -	5	✓ Closing fragment
08-30 03:39	160m	- / -	SP6MAA	+1 / -	9	Partial capture
08-30 03:38	160m	-21 / -	LX1NO	+7 / -	3	✓ Closing observed
08-30 03:26	160m	-16 / -	K9TF	- / -	2	Partial capture
08-30 03:23	160m	-13 / -	DK3HV	0 / -	6	✓ Closing observed
08-30 03:18	160m	-10 / -	OM2WQ	+12 / -	6	✓ Closing observed
08-30 03:18	160m	-15 / -17	SP3IOE	-3 / -	5	✓ Closing observed
08-30 03:17	160m	-13 / -6	G7RAU	-4 / -	5	✓ Closing observed
08-30 03:14	160m	-16 / -	SM3LBN	-11 / -	3	✓ Closing observed
08-30 03:13	160m	-17 / -	NA3M	- / -	3	✓ Closing fragment
08-30 03:12	160m	-17 / -1	LX7I	+6 / -	5	✓ Closing observed
08-30 03:11	160m	-16 / -	W3FAY	- / -	2	✓ Closing fragment
08-30 03:09	160m	- / -	EA1AIQ	-20 / -	2	Partial capture
08-30 03:08	160m	- / -	SP6MAA	0 / -	29	Partial capture
08-30 03:07	160m	-18 / -	WB8SCG	- / -	3	✓ Closing fragment
08-30 03:05	160m	- / -	DK3HV	-2 / -	14	Partial capture
08-30 03:04	160m	- / -	YL4U	+4 / -	2	Partial capture
08-30 03:03	160m	- / -	OM2WQ	+12 / -	7	Partial capture
08-30 02:59	160m	- / -	YL4U	+5 / -	3	Partial capture
08-30 02:58	160m	- / -	OM2WQ	+11 / -	4	Partial capture
08-30 02:54	160m	- / -	EA1AIQ	-16 / -	8	Partial capture
08-30 02:53	160m	- / -	DK3HV	-4 / -	8	Partial capture
08-30 02:51	160m	- / -	EA1AIQ	-14 / -	2	Partial capture
08-30 02:50	160m	-20 / -	W9KEY	- / -10	2	✓ Closing fragment
08-30 02:49	160m	- / -	OM2WQ	+12 / -	8	Partial capture
08-30 02:48	160m	- / -	LA0FA	+7 / -	9	Partial capture
08-30 02:44	160m	- / -	DG1KPC	+4 / -	3	Partial capture
08-30 02:42	160m	- / -	EA1AIQ	-17 / -	11	Partial capture
08-30 02:32	160m	- / -	SP1ZMO	-6 / -	4	Partial capture
08-30 02:30	160m	- / -	YL4U	+4 / -	2	Partial capture
08-30 02:22	160m	- / -	SV8MQP	-1 / -	3	Partial capture
08-30 02:07	80m	- / -13	SP7IIT	+14 / -	4	✓ Closing fragment
08-30 02:06	80m	-9 / -	IW9FRA	- / -12	2	✓ Closing fragment
08-30 02:04	80m	-12 / -11	DL1UDO	+1 / -10	6	✓ Full exchange observed
08-30 02:04	80m	-24 / -	LY2EW	-2 / -	3	✓ Closing observed
08-30 02:00	80m	-12 / -	RO6OP	- / -	3	Partial capture
08-30 01:58	80m	-10 / -	IT9BYL	- / -10	2	Partial capture
08-30 01:57	80m	-10 / -12	LZ6C	0 / -9	4	✓ Full exchange observed
08-30 01:55	80m	-6 / -14	YL3AVN	+6 / -18	5	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
020830 +16  769  K1SFA SP7IIT R-13 (x2)
052215 -18 1909  K1SFA G0BLB IO81
054345  +0 2850  K1SFA F4BYA JN19 (x3)
055115 +13 2495  K1SFA OK1MXD JN89
055115 -11  334  K1SFA EI4KF -04 (x2)
055215  -5 1006  K1SFA DM2GM JN49
055515  +1 2849  K1SFA F4BYA JN19 (x2)
060400 -24 1638  K1SFA ON1JP -13 (x2)
061330 -18 1473  K1SFA F1NQP JN19

20m

UTC    dB Audio  Message
135945  -9 1014  RI1FJL K1SFA FN32
043130 -20 1111  K1SFA DL3MIB JN57
050130 -12 1911  K1SFA VK2BGL R-07 (x2)

160m

UTC    dB Audio  Message
035545  +2 1520  K1SFA S53F R JN75 (x2)
035915  -2  998  K1SFA DG0JK JO60 (x3)
041415 -19 1731  K1SFA DG0OBU -06 (x2)
042630 -18 1651  K1SFA S54L JN75 (x6)
043330 -24 1743  K1SFA IV3TUO JN65
043530  -1  347  K1SFA IW0FFK RR73

40m

UTC    dB Audio  Message
193400 -12 1825  K1SFA SP8ONV KO10 (x2)
194345 -16 1779  K1SFA MI7XHT IO64
194415  +1  879  K1SFA DD7EE JO41
195915  -4 1926  K1SFA IZ8VYU JN71 (x3)

10m

UTC    dB Audio  Message
120145 -24 1602  K1SFA PD4PG JO21
120245  -7 2530  K1SFA PD4RD JO21 (x5)

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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