K4MV — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EM95

Receiver-side FT8 activity involving K4MV, decoded by SO8OO in southeastern Poland. 12 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-08-28 and 2026-10-01.

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 12 FT8 messages attributed to K4MV as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (67%), followed by 20 m (17%) and 80 m (8%). In this small sample, the estimated median decoder S/N was -17 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-17 dB

Estimated median S/N

Bands

80m · 1 60m · 1 40m · 8 20m · 2

First attributed message: 2026-08-28
Last attributed message: 2026-10-01 01:33 UTC

Observed FT8 message patterns

Attributed sample: 12 messages
Active dates: 7 UTC dates
Estimated median S/N: -17 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 8, moderate (-15 to -9 dB) 3, strong (≥ -8 dB) 1.

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 K4MV in decoded directed-looking exchanges:

LX1TI · Luxembourg ×2 DJ0MAB · Fed. Rep. of Germany DL3OCF · Fed. Rep. of Germany F5PBG · France F5RRS · France 9A4ZM · Croatia ER3ZW · Moldova 9A5E · Croatia DL3MIB · Fed. Rep. of Germany DO1ID · Fed. Rep. of Germany LY5A · Lithuania ON7GB · Belgium

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 K4MV

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: EM95 · 4 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 7,876 km (approx.)
Last such locator decoded: 2026-09-19 23:51 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	K4MV S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-03 00:29	40m	- / -	RA3ZH	-4 / -	2	Partial capture
10-02 00:43	80m	- / -16	LY5A	+14 / -	2	✓ Closing fragment
10-02 00:37	40m	- / -	IU8RFW	-2 / -	5	Partial capture
10-01 05:05	80m	- / -13	DL1RNW	+6 / -	4	Partial capture
10-01 05:05	80m	- / -13	DL3OCF	0 / -	2	Partial capture
10-01 05:04	80m	- / -	MM0JTV	-21 / -	3	Partial capture
10-01 05:04	80m	- / -	F5PBG	-8 / -	2	Partial capture
10-01 05:03	80m	- / -18	LX1TI	+6 / -	4	✓ Closing fragment
10-01 05:02	80m	- / -17	ON7GB	+5 / -	7	✓ Closing fragment
10-01 05:01	80m	- / -16	DO1ID	+4 / -	5	✓ Closing fragment
10-01 04:59	80m	- / -	F6FTB	-1 / -	4	Partial capture
10-01 04:55	80m	- / -16	ON1JP	-11 / -	2	Partial capture
10-01 04:53	80m	- / -17	LX1TI	+13 / -	3	✓ Closing fragment
10-01 04:51	80m	- / -	SP8DK	+12 / -	5	Partial capture
10-01 04:46	80m	- / -15	DL3MIB	+11 / -	5	✓ Closing fragment
10-01 04:45	80m	- / -22	OK2SFP	+24 / -	4	Partial capture
10-01 01:32	60m	-18 / -15	9A4ZM	+2 / -10	4	✓ Full exchange observed
09-28 20:04	40m	- / -	F1GUQ	-16 / -	2	Partial capture
09-10 03:14	80m	- / -18	9A5E	+7 / -	3	✓ Closing fragment
09-03 04:22	40m	-15 / -	SV1MOZ	- / -16	2	Partial capture
09-03 04:22	40m	-17 / -1	F5PBG	-17 / -	2	✓ Closing observed
09-03 04:19	40m	- / -6	DJ0MAB	+7 / -	3	✓ Closing fragment
09-03 04:16	40m	- / -7	DL3OCF	+2 / -	5	✓ Closing fragment
09-03 04:16	40m	- / -	F5RRS	+7 / -	3	✓ Closing fragment
08-28 01:21	20m	-8 / -	<...>	- / -25	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
042315 -14 1090  SV1MOZ K4MV -16
042530 -20 1884  K4MV IZ0MIO JN61
043845 -18 1340  RI1FJZ K4MV EM95
235100 -19 1189  SP100PKP K4MV EM95
235130 -18 1190  OE/DL6CGU K4MV EM95
000100 -17 1190  WB8NXR K4MV +06
200415 -16 1524  K4MV F1GUQ JN23 (x2)
003745  -2  938  K4MV IU8RFW JN70 (x5)
002900  -4  387  K4MV RA3ZH KO81 (x2)

80m

UTC    dB Audio  Message
050445  -4  762  K4MV F5PBG IN78
050515  +7 1603  K4MV ON7GB JO21
050515  +5  959  K4MV DL3OCF JO51
050545  +5 1603  K4MV ON7GB R-17
050545 -17 1420  K4MV MM0JTV IO75
050545 +11  311  K4MV DL1RNW -13
050615  -6 1603  K4MV ON7GB 73
050615  -5  806  K4MV DL3OCF -13
050615  +0  311  K4MV DL1RNW -04
050645 -24 1420  K4MV MM0JTV IO75
050645  +1  311  K4MV DL1RNW -04 (x2)
050945 -22 1420  K4MV MM0JTV IO75
004330 +14  797  K4MV LY5A -16 (x2)

60m

UTC    dB Audio  Message
013215 -19 2025  K4MV ER3ZW RR73
013245  +1 1130  K4MV 9A4ZM JN86
013300 -18 1134  9A4ZM K4MV -10
013315  +0 1130  K4MV 9A4ZM R-15 (x2)

20m

UTC    dB Audio  Message
012115  -7 1277  <...> K4MV R-25 (x2)

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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