K1RZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: FM19

Receiver-side FT8 activity involving K1RZ, decoded by SO8OO in southeastern Poland. 63 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 8 UTC dates in the available aggregate history. Observed between 2026-07-03 and 2026-09-07.

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 63 FT8 messages attributed to K1RZ as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (86%), followed by 20 m (11%) and 80 m (3%). Several six-hour UTC windows tied for the largest share (87%), 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 · 2 40m · 54 20m · 7

First attributed message: 2026-07-03
Last attributed message: 2026-09-07 05:22 UTC

Observed FT8 message patterns

Attributed sample: 63 messages
Active dates: 8 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) 32, moderate (-15 to -9 dB) 31, 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 K1RZ in decoded directed-looking exchanges:

S50DK · Slovenia ×2 5P2F/P · Denmark CR7BRV · Portugal CT7AUT · Portugal DF8IU · Fed. Rep. of Germany DG1KDD · Fed. Rep. of Germany DL1YCL · Fed. Rep. of Germany DL7UHD · Fed. Rep. of Germany F1IQH · France F1RCQ · France F1ROA · France F5MNW · France

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 K1RZ

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: FM19 · 29 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 7,310 km (approx.)
Last such locator decoded: 2026-09-07 05:20 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	K1RZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-11 06:02	40m	- / -13	F5MSE	-9 / -	2	Partial capture
09-11 06:00	40m	- / -7	GJ0KYZ	-4 / -	2	✓ Closing fragment
09-11 05:58	40m	- / -15	F1RCQ	-5 / -	4	✓ Closing fragment
09-11 05:57	40m	- / -16	F1IQH	-8 / -	2	✓ Closing fragment
09-11 05:57	40m	- / -16	PD1AC	-12 / -	4	✓ Closing fragment
09-11 05:55	40m	- / -22	F6GGA	-14 / -	3	✓ Closing fragment
09-11 05:54	40m	- / -16	DL1YCL	-10 / -	2	✓ Closing fragment
09-11 05:51	40m	- / -21	DG1KDD	-1 / -	5	✓ Closing fragment
09-07 05:21	40m	-19 / -	LB4HK	- / -10	2	✓ Closing fragment
09-07 05:21	40m	- / -	UW5KW	+1 / -	4	Partial capture
09-07 05:20	40m	-17 / -	IK2YYO	-8 / -9	4	✓ Closing observed
09-07 05:18	40m	- / -	SP2QVY	-6 / -	2	Partial capture
09-07 05:16	40m	- / -	F1ROA	-14 / -	2	✓ Closing fragment
09-07 05:12	40m	- / -	E75FM	-9 / -	5	Partial capture
09-07 05:12	40m	- / -	R3LCG	+2 / -	4	Partial capture
09-07 05:09	40m	-24 / -6	PD0WL	-12 / -12	6	✓ Full exchange observed
09-07 05:09	40m	- / -8	DL7UHD	+1 / -	3	✓ Closing fragment
09-07 05:06	40m	- / -	SP5EXA	-2 / -	2	Partial capture
09-07 05:04	40m	- / -	R3LCG	-10 / -	4	Partial capture
09-06 04:30	40m	-20 / -	YN1ZGN	- / -	2	Partial capture
09-06 04:19	40m	-18 / -10	S50DK	+6 / -	3	✓ Closing observed
09-06 04:16	40m	-16 / -23	RN3ZBX	+4 / -10	7	✓ Full exchange observed
09-06 04:16	40m	-18 / 0	IZ3GOO	+17 / +2	5	✓ Full exchange observed
09-06 04:12	40m	- / -4	F6FHZ	-18 / -	4	✓ Closing fragment
09-06 04:12	40m	- / -8	SV2AOB	-1 / -	3	✓ Closing fragment
09-06 04:10	40m	-16 / -	Z62NS	- / -	2	Partial capture
09-06 04:08	40m	-12 / -14	UY0HY	+3 / -	7	Partial capture
09-06 04:07	40m	- / -8	US1VM	+8 / -	4	Partial capture
09-06 04:06	40m	-14 / -19	UT7NY	+7 / -20	5	✓ Full exchange observed
09-06 04:05	40m	- / -15	R6DYK	-17 / -	3	Partial capture
09-06 04:04	40m	-14 / -7	PA0KGB	-3 / -9	5	✓ Full exchange observed
09-06 04:03	40m	- / -	F6FHZ	-20 / -	2	Partial capture
09-06 04:00	40m	-10 / -13	5P2F/P	-4 / -9	3	✓ Full exchange observed
09-05 05:21	40m	- / -14	IK4RVY	0 / -	4	Partial capture
09-05 05:18	40m	- / -15	PA2RO	-6 / -	3	✓ Closing fragment
09-05 04:59	40m	- / -9	IZ2QPP	+7 / -	3	Partial capture
09-05 04:55	40m	- / -10	F5MNW	-9 / -	2	✓ Closing fragment
09-05 04:53	40m	- / -11	DF8IU	+7 / -	2	✓ Closing fragment
09-05 04:04	40m	- / -	F4IIX	-8 / -	3	Partial capture
09-05 03:59	40m	-17 / -	KJ5PTH	- / -1	5	Partial capture
09-05 03:58	40m	-12 / -	HA5CPN	- / -20	2	✓ Closing fragment
09-05 02:42	40m	- / +4	CT7AUT	-9 / -	2	✓ Closing fragment
09-05 00:46	40m	- / -7	SV5BYP	-1 / -	9	✓ Closing fragment
09-04 23:44	40m	- / -7	CR7BRV	-6 / -	2	✓ Closing fragment
09-04 23:37	40m	- / -19	UW5IM	0 / -	15	Partial capture
09-03 02:50	40m	- / -	IW0HAC	-4 / -	6	Partial capture
09-03 02:50	40m	- / -11	RZ6LY	0 / -	4	Partial capture
09-03 02:50	40m	- / -	UA3RMB	-7 / -	16	Partial capture
09-03 01:35	40m	-14 / -	KT8Z	- / -2	2	✓ Closing fragment
09-02 02:41	40m	- / -	EA1AOC	-1 / -	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
055700  -9  753  K1RZ F1IQH R-16
055730 -10 1284  K1RZ PD1AC JO22
055730  -8  753  K1RZ F1IQH 73
055800 -13 1284  K1RZ PD1AC R-16
055800  -6 2423  K1RZ F1RCQ JN19
055830 -11 1284  K1RZ PD1AC 73
055830  -2 2422  K1RZ F1RCQ JN19 (x3)
060000  -3  752  K1RZ GJ0KYZ R-07 (x2)
060230  -8 1132  K1RZ F5MSE -13
060230 -12 2039  K1RZ F4GUK JN18
060330 -10 1132  K1RZ F5MSE -08
060430  -1 1719  K1RZ SN40KZE -24

80m

UTC    dB Audio  Message
024615 -24 2261  K2B K1RZ FM19 (x2)

20m

UTC    dB Audio  Message
174045 -15 1952  K1RZ <...> -16
220145 -14 1932  <...> K1RZ FM19 (x7)

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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