K3STL — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: FN00

Receiver-side FT8 activity involving K3STL, decoded by SO8OO in southeastern Poland. 25 FT8 messages attributed to this token as transmitter, on 20m, across 1 UTC dates in the available aggregate history. Last observed 2026-08-22.

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 25 FT8 messages attributed to K3STL as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -7 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-7 dB

Estimated median S/N

Bands

20m · 25

First attributed message: 2026-08-22
Last attributed message: 2026-08-22 23:37 UTC

Observed FT8 message patterns

Attributed sample: 25 messages
Active dates: 1 UTC dates
Estimated median S/N: -7 dB
Estimated 10th-90th percentile: -21 to -5 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 5, strong (≥ -8 dB) 15.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with K3STL in decoded directed-looking exchanges:

IK4LZH · Italy EC1A · Spain HB9SZV · Switzerland IW4DV · Italy PD8MD · Netherlands SP1TJ · Poland EC3A · Spain MI0NWA · Northern Ireland PI4DX · Netherlands

Most frequent locator attributed to K3STL

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: FN00 · 10 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 7,348 km (approx.)
Last such locator decoded: 2026-08-22 23:35 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	K3STL S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-19 05:32	80m	- / -14	PI4DX	-7 / -	4	✓ Closing fragment
09-19 05:29	80m	- / -16	MI0NWA	-10 / -	2	✓ Closing fragment
09-16 03:25	80m	- / -	F5MYK	-8 / -	3	Partial capture
09-16 03:15	80m	- / -14	EC3A	-18 / -	2	✓ Closing fragment
08-22 23:34	20m	-6 / -	US4EX	- / -17	2	Partial capture
08-22 23:31	20m	-6 / -	N2LEE	- / -11	2	Partial capture
08-22 23:30	20m	- / -	F4BYA	+5 / -	3	Partial capture
08-22 23:27	20m	-7 / -	VO2NS	- / -6	4	Partial capture
08-22 23:26	20m	- / -	SV5BYP	-7 / -	2	Partial capture
08-22 23:26	20m	- / -	YT1DDL	+5 / -	2	Partial capture
08-22 23:24	20m	-8 / -	DL9UXF	- / -14	2	Partial capture
08-22 23:19	20m	- / -8	EA5IHI	-8 / -	3	Partial capture
08-22 23:18	20m	- / -	DB3EH	-10 / -	7	Partial capture
08-22 23:18	20m	- / -	F4VTR	-1 / -	4	Partial capture
08-22 23:15	20m	- / -8	IK4LZH	+1 / -	4	✓ Closing fragment
08-22 23:14	20m	- / -	IW2MYH	-4 / -	5	Partial capture
08-22 23:13	20m	-21 / -	5Z4VJ	- / -7	2	Partial capture
08-22 23:13	20m	- / -	DL1VCA	-2 / -	3	Partial capture
07-19 05:00	40m	- / -15	IZ5JNO	-9 / -	2	Partial capture
07-19 04:30	40m	- / -18	PD8MD	-16 / -	6	✓ Closing fragment
07-19 04:28	40m	- / -	OM0RX	-12 / -	4	Partial capture
07-19 04:24	40m	- / -16	IW4DV	-10 / -	5	✓ Closing fragment
07-19 04:09	40m	- / -25	ES2AJ	-8 / -	2	Partial capture
07-19 03:51	40m	- / -16	SP1TJ	-8 / -	7	✓ Closing fragment
07-19 03:31	40m	- / -	G8GRG	-9 / -	2	Partial capture
07-19 03:08	40m	- / -	DL1UDO	-2 / -	3	Partial capture
07-19 02:58	40m	- / -	OO0O	-10 / -	2	Partial capture
07-19 01:16	40m	- / -17	HB9SZV	-13 / -	7	✓ Closing fragment
07-19 01:14	40m	- / -14	EC1A	-12 / -	3	✓ Closing fragment
07-19 00:59	40m	- / -	DG7BST	-10 / -	4	Partial capture
07-18 22:51	20m	- / -	M7NHD	-3 / -	3	Partial capture
07-18 22:29	20m	- / -	M9VVE	-6 / -	2	Partial capture
07-18 03:30	40m	- / -	DL8WEM	-6 / -	2	Partial capture
07-17 22:16	20m	- / -	DL1R	+5 / -	2	Partial capture
07-17 21:36	20m	- / -13	IK4LZH	-7 / -	2	Partial capture
07-17 21:12	20m	- / -10	EA4T	-18 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
025945  -2 2022  K3STL TF3VS HP94
031515 -18 1663  K3STL EC3A -14 (x2)
032545 -16  714  K3STL WA0YPC R-02
032545  -4 2363  K3STL F5MYK IN97 (x4)
052900  -3  714  K3STL MI0NWA -16 (x2)
053200 -10 1081  K3STL PI4DX -14 (x4)

20m

UTC    dB Audio  Message
232930  -6  874  CQ K3STL FN00 (x2)
233015  +1 2914  K3STL F4BYA JN19
233030  -7  874  CQ K3STL FN00
233045  +5 2914  K3STL F4BYA JN19
233100  -5  874  N2LEE K3STL -11
233115  +8 2914  K3STL F4BYA JN19
233130  -6  874  N2LEE K3STL RRR
233215 -16 1116  K3STL ON3CCM JO10
233230  -6  874  UW8SM K3STL RRR
233300  -6  874  CQ K3STL FN00
233400  -6  874  US4EX K3STL -17 (x2)
233500 -10  875  CQ K3STL FN00                         a1
233730  -9  875  IU8UHK K3STL -18

40m

UTC    dB Audio  Message
042815  -9 1538  K3STL OM0RX JN88
042815  -9 1230  K3STL IW4DV JN54
042815  -8 1115  K3STL DL3OCF -19
042845  -9 1538  K3STL OM0RX JN88 (x3)
043045 -11 2567  K3STL PD8MD JO32 (x2)
043115  +0  241  K3STL DL3OCF -15
043215 -20 1179  K3STL PD8MD JO32 (x4)
050045 -11 1726  K3STL IZ5JNO -15 (x2)

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