KF4VTT — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: FM06

Receiver-side FT8 activity involving KF4VTT, decoded by SO8OO in southeastern Poland. 42 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-08 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 42 FT8 messages attributed to KF4VTT as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (95%), followed by 20 m (5%). Several six-hour UTC windows tied for the largest share (95%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's moderate S/N range (62%); the estimated median was -15 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-15 dB

Estimated median S/N

Bands

40m · 40 20m · 2

First attributed message: 2026-06-08
Last attributed message: 2026-09-06 03:24 UTC

Observed FT8 message patterns

Attributed sample: 42 messages
Active dates: 6 UTC dates
Estimated median S/N: -15 dB
Estimated 10th-90th percentile: -18 to -11 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 16, moderate (-15 to -9 dB) 26, strong (≥ -8 dB) 0.

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 KF4VTT in decoded directed-looking exchanges:

5B4AMX · Cyprus CX2SA · Uruguay DL3MIB · Fed. Rep. of Germany K2NKP · United States KG5LRB · United States KR4EOD · United States OM8GT · Slovak Republic RN6HK · European Russia SP6AMI · Poland UT2AU · Ukraine W5MEF · United States W8ATE · 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 KF4VTT

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: FM06 · 13 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 7,672 km (approx.)
Last such locator decoded: 2026-09-06 03:16 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	KF4VTT S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-06 03:24	40m	-17 / -10	UT2AU	+19 / -9	4	✓ Full exchange observed
09-06 03:23	40m	-16 / -	SP6AMI	- / -20	2	✓ Closing fragment
09-06 03:22	40m	- / -	IW9FRA	-23 / -	3	Partial capture
09-06 03:20	40m	-16 / -	DL3MIB	- / -11	3	✓ Closing fragment
09-06 03:20	40m	- / -14	US1VM	-3 / -	4	Partial capture
09-06 03:16	40m	-13 / -	Z62NS	- / -18	5	✓ Closing fragment
09-02 01:23	40m	-18 / -	SP7NC	- / -17	2	Partial capture
09-02 01:22	40m	- / -	DK8HC	-12 / -	2	Partial capture
09-02 01:20	40m	-14 / -	KG5LRB	- / -6	3	✓ Closing fragment
08-31 03:30	40m	-16 / -	OM8GT	- / -14	2	✓ Closing fragment
08-31 03:24	40m	- / -	4L7T	-12 / -	3	Partial capture
08-31 03:22	40m	- / -	G5TV	-1 / -	10	Partial capture
08-31 03:22	40m	-16 / -	W5MEF	- / -17	3	✓ Closing fragment
08-31 00:43	40m	- / -	RA4FUT	+3 / -	3	Partial capture
08-31 00:42	40m	-12 / -	W8ATE	- / -5	4	✓ Closing fragment
08-31 00:40	40m	-11 / -	KR4EOD	-21 / -1	4	✓ Closing observed
08-26 19:34	20m	- / -	M9KTM	+4 / -	2	Partial capture
08-25 02:48	40m	-14 / -	K2NKP	- / -5	4	✓ Closing fragment
08-25 02:43	80m	- / -19	MM0KQC	-5 / -	3	Partial capture
08-25 02:38	80m	- / -16	MM0KQC	-6 / -	3	Partial capture
08-25 02:33	80m	- / -16	DO1ID	+8 / -	6	Partial capture
08-25 02:22	40m	-12 / -	CX2SA	- / -7	2	✓ Closing fragment
08-25 02:21	40m	-14 / -14	RN6HK	+5 / -	4	✓ Closing observed
08-25 02:20	40m	-13 / -	W8EH	- / -18	2	Partial capture
08-15 01:15	20m	- / +8	5B4AMX	-16 / -	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
032015 -18 1082  DL3MIB KF4VTT -11
032030  -2 2885  KF4VTT US1VM -14
032045 -16 1083  DL3MIB KF4VTT -11
032100  -4 2885  KF4VTT US1VM -14
032115 -15 1083  DL3MIB KF4VTT RR73
032130  +3 2885  KF4VTT US1VM -14
032230 -24 1346  KF4VTT IW9FRA JM68 (x2)
032315 -15 1082  SP6AMI KF4VTT R-20
032330 -24 1346  KF4VTT IW9FRA JM68
032345 -17 1082  SP6AMI KF4VTT 73
032400 +21  585  KF4VTT UT2AU KO61
032415 -17 1083  UT2AU KF4VTT -09
032500 +18  586  KF4VTT UT2AU R-10 (x2)

20m

UTC    dB Audio  Message
011500 -19 1778  KF4VTT 5B4AMX +08 (x2)
193400  +3  965  KF4VTT M9KTM IO91
193430 -18 2579  CT1END/P KF4VTT FM06
193500  +4  965  KF4VTT M9KTM IO91
193930 -17 2579  CT1END/P KF4VTT FM06

80m

UTC    dB Audio  Message
023300  +5  382  KF4VTT DO1ID -16 (x6)
023830  -6 1450  KF4VTT MM0KQC -16 (x3)
024115  +6 2121  KF4VTT OZ5NJ JO45
024330  -3 1450  KF4VTT MM0KQC -19 (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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