KB1EFS — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: FN14

Receiver-side FT8 activity involving KB1EFS, decoded by SO8OO in southeastern Poland. 1,351 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, across 34 UTC dates in the available aggregate history. Observed between 2026-06-11 and 2026-09-16.

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 1,351 FT8 messages attributed to KB1EFS as the transmitting token by decoded message structure across 34 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (50%), followed by 80 m (32%) and 20 m (19%). Most decodes (90%) fell within the six-hour window 22:00-04:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

1,351

Messages attributed

UTC dates decoded

152

Active 15-min windows

-12 dB

Estimated median S/N

Bands

80m · 426 60m · 1 40m · 674 20m · 250

First attributed message: 2026-06-11
Last attributed message: 2026-09-16 02:01 UTC

Observed FT8 message patterns

Attributed sample: 1,351 messages
Active dates: 34 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -21 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 390, moderate (-15 to -9 dB) 518, strong (≥ -8 dB) 443.

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 KB1EFS in decoded directed-looking exchanges:

F1PBZ · France ×4 PA2EW · Netherlands ×3 LB5JK · Norway ×2 MM0KQC · Scotland ×2 EA8AR · Canary Islands ×2 K8GED · United States ×2 KA3PMW · United States ×2 M0PEL · England ×2 N0XRG · United States ×2 SP1ZMO · Poland ×2 UR3QFL · Ukraine ×2 W3HVG · United States ×2

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 KB1EFS

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: FN14 · 774 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 6,917 km (approx.)
Last such locator decoded: 2026-09-14 03:08 UTC

Other locator fields attributed to this token: FN41 (31).

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	KB1EFS S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-16 01:52	60m	- / -17	G0AZH	-6 / -	6	✓ Closing fragment
09-16 01:48	60m	- / -13	PE1MHY	+1 / -	4	✓ Closing fragment
09-15 02:40	40m	-7 / -	CM7DJG	-24 / -18	2	Partial capture
09-15 02:09	40m	- / -	RA6OY	-9 / -	3	Partial capture
09-14 03:06	80m	- / -	ES5RY	-4 / -	2	Partial capture
09-14 03:06	80m	- / -	MM0ABM	-15 / -	3	Partial capture
09-14 02:46	80m	-22 / -	VE6NS	- / -16	2	✓ Closing fragment
09-14 02:46	80m	- / -	YO6GLT	-7 / -	3	Partial capture
09-14 02:42	80m	- / -	YO6GLT	+1 / -	3	Partial capture
09-14 02:35	80m	- / -	ON4MAP	-18 / -	3	Partial capture
09-14 02:34	80m	-16 / -	KF5VM	- / -5	2	✓ Closing fragment
09-14 02:34	80m	- / -	RV6C	-16 / -	2	Partial capture
09-14 02:34	80m	- / -	9A1DR	0 / -	2	Partial capture
09-14 02:32	80m	- / -23	UR5ZHJ	0 / -	2	Partial capture
09-14 02:31	80m	- / -	OH5XX	-6 / -	4	Partial capture
09-14 02:28	80m	- / -	DO5PY	-9 / -	5	Partial capture
09-14 02:28	80m	- / -13	SQ6ELK	-6 / -	2	Partial capture
09-14 02:25	80m	-20 / -	WB2DRS	- / +6	2	✓ Closing fragment
09-14 02:24	80m	-20 / -	LU1FP	- / -10	2	✓ Closing fragment
09-14 02:18	80m	-24 / -	K2CQW	- / +3	2	✓ Closing fragment
09-14 02:17	80m	-22 / -11	IU2QDY	-12 / -24	4	✓ Full exchange observed
09-14 02:17	80m	- / -	DO5PY	-15 / -	2	Partial capture
09-14 02:14	80m	- / -	SP3HGD	-11 / -	2	Partial capture
09-14 02:13	80m	- / -	PA3KUS	-6 / -	6	✓ Closing fragment
09-14 00:04	40m	-18 / -	N5FMP	- / -2	3	✓ Closing fragment
09-13 23:59	40m	-16 / -	KD9OFG	- / -4	2	✓ Closing fragment
09-13 23:47	40m	- / -11	EX7CQ	-3 / -	2	✓ Closing fragment
09-13 23:42	40m	-17 / -	PY3BTW	- / -24	5	Partial capture
09-13 23:38	40m	-17 / -8	SV7SXE	-10 / -17	4	✓ Full exchange observed
09-13 23:35	40m	-15 / -	EA5JAH	-1 / -15	4	✓ Closing observed
09-13 23:33	40m	-13 / -	WA2HMM	- / -12	2	✓ Closing fragment
09-13 23:30	40m	-15 / -	WD2P	- / -10	2	✓ Closing fragment
09-13 02:39	80m	- / -24	OH2BVT	-4 / -	2	Partial capture
09-13 02:34	80m	- / -	9A5VS	-6 / -	4	Partial capture
09-13 02:34	80m	- / -	OM1DMT	+12 / -	3	Partial capture
09-13 02:30	80m	- / -	PA3KUS	+3 / -	24	Partial capture
09-13 01:43	80m	- / -	PA3KUS	+5 / -	12	Partial capture
09-13 01:35	80m	- / -	PA3KUS	+6 / -	9	Partial capture
09-13 01:33	80m	-24 / -	WB3FME	- / -19	2	✓ Closing fragment
09-13 01:32	80m	-24 / -	HK4QHD	- / -17	2	✓ Closing fragment
09-13 01:28	80m	- / -14	ON1JP	-15 / -	4	Partial capture
09-13 01:25	80m	- / -	PA3KUS	+3 / -	11	Partial capture
09-13 01:19	40m	-7 / -	RN6LPC	-2 / -22	9	Partial capture
09-13 01:17	40m	-7 / -	KE9BUP	- / -1	2	✓ Closing fragment
09-13 01:02	80m	- / -11	DH1KJ	+2 / -	3	✓ Closing fragment
09-13 01:01	80m	- / -	DO5PY	-2 / -	2	Partial capture
09-13 00:55	80m	- / -16	LA0FA	+13 / -	3	✓ Closing fragment
09-13 00:52	80m	- / -	DL7UKM	+12 / -	3	Partial capture
09-13 00:44	80m	- / -6	EA3JL	-7 / -	4	✓ Closing fragment
09-13 00:44	80m	- / -	ON4MAP	-9 / -	6	Partial capture

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
014815  +0  836  KB1EFS PE1MHY -13 (x4)
015245  -6  532  KB1EFS G0AZH IO83 (x6)
020130 -23 2106  CQ KB1EFS FN41                        a1
021415 -22 1433  KB1EFS KD4IE EL98

40m

UTC    dB Audio  Message
000000 -13 2142  CQ KB1EFS FN14
000430 -20 2195  N5FMP KB1EFS FN14 (x3)
000600 -18 2195  CQ KB1EFS FN14
020945 -10 1102  KB1EFS RA6OY KN88 (x3)
022045 -10 2830  KB1EFS N3GTY R+06
023630  -6 2830  CQ KB1EFS FN41
024015 -24 1870  KB1EFS CM7DJG FL10
024130  -7 2830  CM7DJG KB1EFS -18
024300  -8 2831  CQ KB1EFS FN41                        a1 (x3)

80m

UTC    dB Audio  Message
024730  -9 1662  KB1EFS YO6GLT KN36
024745 -15 1662  CQ KB1EFS FN14
024815 -19 1662  WA0YPC KB1EFS -08
025015 -18 1662  CQ KB1EFS FN14 (x2)
030630 -16 1831  KB1EFS MM0ABM IO75
030630  -4  650  KB1EFS ES5RY KO38
030645 -24 1662  CQ KB1EFS FN14
030700 -14 1831  KB1EFS MM0ABM IO75
030715 -24 1662  CQ KB1EFS FN14
030730 -14 1831  KB1EFS MM0ABM IO75
030800  -5  650  KB1EFS ES5RY KO38
030845 -17 1662  CQ KB1EFS FN14
030900  -5 1662  KB1EFS SP5HZM JO92
030915 -21 1663  LZ1EV KB1EFS -21

20m

UTC    dB Audio  Message
165045 -18 2124  KB1EFS IK2LRF JN45
165115  -9 2021  KB1EFS PD0RDD R-23 (x2)
165245  -7 2124  KB1EFS IK2LRF JN45
165945  +7 2021  KB1EFS PD3FR JO22 (x2)
170315  +5 2021  KB1EFS OE5NVL JN67
170745  +6 2021  KB1EFS HB9BXS R-13
171915  +3 2021  KB1EFS PD8XXX JO22
172115  -8 2021  KB1EFS PD5DSL JO22 (x3)
172415 -12 1722  KB1EFS DL5ALF JN48 (x2)
173315 -14  777  KB1EFS EA4HHN -13

10m

UTC    dB Audio  Message
201300 -17 2278  KB1EFS DN9OPA JN38 (x5)
131445 +10  628  KB1EFS HB9CTU JN47 (x3)
145100 -21 1341  KB1EFS F4LWD RR73
150115 -22 1654  KB1EFS SV0LS KN00

160m

UTC    dB Audio  Message
015145 -18 1097  KB1EFS DO8DL JO40

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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