K4RCW — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States

Receiver-side FT8 activity involving K4RCW, decoded by SO8OO in southeastern Poland. 3 FT8 messages attributed to this token as transmitter, on 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-12 and 2026-08-26.

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 3 FT8 messages attributed to K4RCW as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The available sample contains attributed decodes on 20 m (100%). The sample is too small to infer a recurring UTC-hour or received-S/N pattern.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

S/N pattern not inferred

Bands

20m · 3

First attributed message: 2026-06-12
Last attributed message: 2026-08-26 22:49 UTC

Observed FT8 message patterns

Attributed sample: 3 messages
Active dates: 2 UTC dates
S/N summary: Too few decodes
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

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 K4RCW in decoded directed-looking exchanges:

HZ1TT · Saudi Arabia ×2 9K2YM · Kuwait K2F · United States DK8ZZ · Fed. Rep. of Germany DL3MIB · Fed. Rep. of Germany F5UKW · France PV8AJ · Brazil 5B4VL · Cyprus F5OZC · France F6FTB · France IV3DSG · Italy PA4PA · Netherlands

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	K4RCW S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-11 04:59	40m	- / -15	DL3MIB	+16 / -	2	✓ Closing fragment
09-11 04:55	40m	- / 0	PV8AJ	-18 / -	2	✓ Closing fragment
09-11 04:53	40m	- / -15	DK8ZZ	+7 / -	2	✓ Closing fragment
09-09 03:03	60m	- / -16	F5BRF	-14 / -	2	Partial capture
09-05 05:36	60m	- / -15	F5OZC	-9 / -	2	✓ Closing fragment
09-04 05:43	40m	- / -	G5TV	-7 / -	8	Partial capture
09-04 05:39	40m	- / -7	F5UKW	+11 / -	3	✓ Closing fragment
09-04 05:36	40m	- / -11	DL3OCF	+12 / -	2	Partial capture
09-04 05:33	40m	- / -	SP5LST	-18 / -	2	Partial capture
09-04 05:28	40m	- / -14	G5TV	0 / -	14	Partial capture
09-04 05:20	60m	- / -14	F6FTB	-12 / -	7	✓ Closing fragment
09-04 05:09	60m	- / -24	IV3DSG	+4 / -	3	✓ Closing fragment
09-04 00:28	60m	- / -11	PA4PA	0 / -	2	✓ Closing fragment
09-04 00:23	40m	- / -	PC2J	+8 / -	5	Partial capture
08-27 05:14	20m	- / -	TA2EE	0 / -	5	Partial capture
08-26 22:41	20m	- / -16	9K2YM	+10 / -	2	✓ Closing fragment
08-13 03:14	60m	- / -10	5B4VL	-2 / -	2	✓ Closing fragment
07-24 02:46	80m	- / -18	K3EDP	-24 / -	3	✓ Closing fragment
07-23 06:13	20m	- / +9	F1PSX	-6 / -	2	Partial capture
07-23 02:20	80m	- / -10	KM0T	-22 / -	2	Partial capture
07-22 01:26	40m	- / -	F4BYA	+1 / -	3	Partial capture
07-22 01:13	40m	- / -	OO0O	-9 / -	9	Partial capture
06-23 02:36	40m	- / -	DC8SM	-18 / -	4	Partial capture
06-23 02:11	40m	- / -18	HZ1TT	-12 / -	5	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
054345  -8  657  K4RCW G5TV IO93 (x7)
035000 -11 1609  K4RCW SO100PKP -04
045345  +3 2487  K4RCW DK8ZZ -15 (x2)
045515 -20 1345  K4RCW PV8AJ +00 (x2)
045945 +15 1070  K4RCW DL3MIB -15 (x2)
050245  -1  592  K4RCW HB9IRO JN46

60m

UTC    dB Audio  Message
002830  -1 1777  K4RCW PA4PA RR73
050930  +0  587  K4RCW IV3DSG JN66 (x3)
052015 -13 2247  K4RCW F6FTB JN27 (x7)
053630 -11 1518  K4RCW F5OZC -15 (x2)
030345 -21 1733  K4RCW F5BRF -16 (x2)

20m

UTC    dB Audio  Message
220800 -22 1594  K4RCW K2F RR73
004530 -11 1246  K4RCW W7WZ EM94
054700  +4 2930  K4RCW LZ3BS KN22
061330  -6  623  K4RCW F1PSX JN08 (x2)
224100 +11 1441  K4RCW 9K2YM -16 (x2)
224915  -1  704  K4RCW W1AW/2 +01
224930 -21 1623  <...> K4RCW R-05
051430 -10 2757  K4RCW TA2EE KM69 (x5)

80m

UTC    dB Audio  Message
011245  -4  753  K4RCW W1MK -23
022045 -23 1869  K4RCW KM0T -10 (x2)
024630 -24 1414  K4RCW K3EDP -18 (x3)

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