K5UR — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EM35

Receiver-side FT8 activity involving K5UR, decoded by SO8OO in southeastern Poland. 22 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-07-20 and 2026-09-04.

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 22 FT8 messages attributed to K5UR as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (73%), followed by 80 m (18%) and 40 m (9%). Several six-hour UTC windows tied for the largest share (95%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -16 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-16 dB

Estimated median S/N

Bands

80m · 4 40m · 2 20m · 16

First attributed message: 2026-07-20
Last attributed message: 2026-09-04 04:45 UTC

Observed FT8 message patterns

Attributed sample: 22 messages
Active dates: 5 UTC dates
Estimated median S/N: -16 dB
Estimated 10th-90th percentile: -21 to -11 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 12, moderate (-15 to -9 dB) 10, 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 K5UR in decoded directed-looking exchanges:

9K2YM · Kuwait 9A4ZM · Croatia PD0DDA · Netherlands RV3QI · European Russia G5TV · England I1RJP · Italy 5B4VL · Cyprus DB3ZY · Fed. Rep. of Germany F8NHF · France IW0FFK · Italy N8OQ · 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 K5UR

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: EM35 · 7 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,564 km (approx.)
Last such locator decoded: 2026-08-26 22:24 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	K5UR S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-05 04:42	40m	- / -	HB9IRO	-4 / -	2	Partial capture
09-04 04:46	40m	- / -	IZ2QPP	-3 / -	2	Partial capture
09-04 04:45	40m	-22 / -	G5TV	- / -25	2	✓ Closing fragment
08-26 22:28	20m	- / -2	W1AW/2	+3 / -	3	Partial capture
08-12 01:21	80m	- / -	SQ9LOJ	+11 / -	5	Partial capture
08-11 03:22	40m	- / -9	I1RJP	-8 / -	4	✓ Closing fragment
08-11 03:07	80m	-14 / -	<...>	- / -	4	Partial capture
08-10 03:09	60m	- / -10	5B4VL	-2 / -	2	✓ Closing fragment
08-05 01:50	60m	- / -7	DB3ZY	-8 / -	6	✓ Closing fragment
08-05 01:50	60m	- / -5	F8NHF	+3 / -	4	✓ Closing fragment
08-02 03:26	40m	- / -	IW2DNI	-10 / -	2	Partial capture
07-29 01:48	20m	-14 / -	9A4ZM	- / -9	2	✓ Closing fragment
07-29 01:46	20m	-14 / -	<...>	- / +3	2	Partial capture
07-29 01:42	20m	-13 / -	<...>	- / -22	4	Partial capture
07-25 03:10	80m	- / -23	<...>	0 / -	2	Partial capture
07-25 03:08	80m	- / -16	IW0FFK	-4 / -	3	✓ Closing fragment
07-25 02:55	80m	- / +6	N8OQ	-8 / -	2	✓ Closing fragment
07-23 01:00	40m	- / -	I1RJP	-12 / -	2	Partial capture
07-20 04:23	20m	- / -12	R6SS	-14 / -	5	Partial capture
07-20 04:22	20m	-16 / -8	RV3QI	-12 / -12	3	✓ Full exchange observed
07-20 04:20	20m	-16 / -	PD0DDA	- / -16	2	✓ Closing fragment
07-20 04:15	20m	- / -	UX1VT	-19 / -	2	Partial capture
07-20 04:09	20m	- / -	RK4H	-6 / -	2	Partial capture
07-11 07:02	20m	- / -	LZ1ZJ	-6 / -	4	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
032645 -11  546  K5UR IW2DNI JN45 (x2)
004430  -2 2817  K5UR I1RJP JN45 (x5)
044515 -21 1357  G5TV K5UR -25 (x2)
044600  -4  832  K5UR IZ2QPP JN46
044600  +2  260  K5UR DL3OCF -09
044630  -2  831  K5UR IZ2QPP JN46 (x2)
044230  -7  701  K5UR HB9IRO JN46 (x2)

20m

UTC    dB Audio  Message
042600 -12 2101  K5UR R6SS -12 (x2)
014200  -9 2347  <...> K5UR EM35 (x6)
014830 -11 2332  9A4ZM K5UR -09 (x2)
015230 -16 2331  UR4QWW K5UR -16
222430 -13 1525  IR7MGGC K5UR EM35
222845  +3  704  K5UR W1AW/2 -02 (x3)

80m

UTC    dB Audio  Message
030800  -5 1800  K5UR IW0FFK -16 (x3)
031030  +3 2349  K5UR <...> -23 (x2)
022245 -20 2005  K5UR W1AW/4 +01
030715 -16 2299  <...> K5UR EM35 (x4)
012100 +12 1707  K5UR SQ9LOJ JO90 (x5)

60m

UTC    dB Audio  Message
015030  +1  955  K5UR F8NHF JO10
015030 -16 1574  K5UR DB3ZY JO40
015100  +4  955  K5UR F8NHF JO10
015100  -6 1574  K5UR DB3ZY JO40
015130  +3  955  K5UR F8NHF R-05
015130  -4 1574  K5UR DB3ZY JO40
015200  +3  955  K5UR F8NHF 73
015200  -4 1653  K5UR DB3ZY JO40 (x3)
030915  +0 1146  K5UR 5B4VL -10 (x2)

10m

UTC    dB Audio  Message
165100 -16 1075  K5UR 9K2YM RR73

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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