KZ4SC — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: FN30

Receiver-side FT8 activity involving KZ4SC, decoded by SO8OO in southeastern Poland. 44 FT8 messages attributed to this token as transmitter, on 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-08-25 and 2026-08-28.

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 44 FT8 messages attributed to KZ4SC as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -11 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-11 dB

Estimated median S/N

Bands

20m · 44

First attributed message: 2026-08-25
Last attributed message: 2026-08-28 20:08 UTC

Observed FT8 message patterns

Attributed sample: 44 messages
Active dates: 2 UTC dates
Estimated median S/N: -11 dB
Estimated 10th-90th percentile: -16 to 0 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 20, strong (≥ -8 dB) 19.

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 KZ4SC in decoded directed-looking exchanges:

4L7T · Georgia E79KO · Bosnia-Herzegovina F1PBZ · France GI1UPS · Northern Ireland HB9EHP · Switzerland M9KTM · England R4HHN · European Russia R7WA · European Russia RN6HGI · European Russia RU3GF · European Russia WA4FU · United States EA1AXX · Spain

Most frequent locator attributed to KZ4SC

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: FN30 · 19 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 6,990 km (approx.)
Last such locator decoded: 2026-08-25 22:49 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	KZ4SC S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-15 04:26	80m	- / -21	F4BPO	+5 / -	11	✓ Closing fragment
10-15 04:26	80m	- / -	F6ECI	+11 / -	3	Partial capture
10-14 05:39	40m	- / -	DL1MEV	-10 / -	5	Partial capture
10-14 05:38	40m	- / -	PA3FRX	-12 / -	4	Partial capture
10-14 05:36	40m	- / -	SV1OML	-14 / -	13	Partial capture
10-14 05:35	40m	- / -	F4NGK	-8 / -	2	Partial capture
10-14 05:31	40m	- / -	OZ6G	0 / -	3	Partial capture
10-14 05:26	40m	- / -16	IK4RVY	-4 / -	7	✓ Closing fragment
10-14 04:58	40m	- / -3	F5OYA/P	-14 / -	12	✓ Closing fragment
10-14 04:53	40m	- / -24	I0QMY	-9 / -	6	✓ Closing fragment
10-13 05:40	40m	- / -	OE9DAI	0 / -	11	Partial capture
10-13 05:30	40m	- / -	EU7FBB	+2 / -	2	Partial capture
10-13 05:30	40m	- / -	DK3JW	+2 / -	2	Partial capture
10-13 05:30	40m	- / -12	F4MZI	-11 / -	8	Partial capture
10-13 05:29	40m	- / -	LZ2XF	-2 / -	5	Partial capture
10-13 05:29	40m	- / -	M0KSE	-20 / -	2	Partial capture
09-20 05:25	40m	- / -10	EA6AJW	-14 / -	2	Partial capture
09-20 05:14	40m	- / -6	F5NBU	+6 / -	3	✓ Closing fragment
09-20 05:10	40m	- / -22	F4FCE	0 / -	3	✓ Closing fragment
08-28 19:54	20m	- / -	F4JVF	+17 / -	2	Partial capture
08-28 19:49	20m	- / -19	M9KTM	+4 / -	3	✓ Closing fragment
08-28 04:57	20m	- / -3	RU3GF	-8 / -	2	✓ Closing fragment
08-26 07:09	20m	- / -22	F4LNM	+8 / -	6	Partial capture
08-26 03:22	20m	- / -20	R7WA	0 / -	2	✓ Closing fragment
08-26 03:08	20m	- / -20	R4HHN	-8 / -	3	✓ Closing fragment
08-26 03:05	20m	- / -12	RN6HGI	-16 / -	3	✓ Closing fragment
08-26 02:57	20m	- / -10	OK2CNI	-10 / -	3	Partial capture
08-25 22:41	20m	-5 / -	KW8CW	- / -23	3	Partial capture
08-25 22:37	20m	- / -	EA1JVG	-14 / -	12	Partial capture
08-25 22:37	20m	-13 / -	SP9XG	- / -21	7	Partial capture
08-25 22:35	20m	-11 / -	ER1CW	- / -	3	Partial capture
08-25 22:33	20m	0 / -	ON2CB	- / -9	2	Partial capture
08-25 22:28	20m	-1 / -	RZ2A	- / -9	2	Partial capture
08-25 22:27	20m	-6 / -	S53KS	- / -9	2	Partial capture
08-25 22:19	20m	-14 / -4	GI1UPS	-8 / -17	8	✓ Full exchange observed
08-25 21:55	20m	-2 / -	E79KO	- / -16	4	✓ Closing fragment
08-25 21:41	20m	-10 / -	4L7T	- / -16	2	✓ Closing fragment
08-25 03:57	20m	- / -16	RA6MQ	+4 / -	3	Partial capture
08-25 03:54	20m	- / -	RT6C	-8 / -	2	Partial capture
08-25 03:52	20m	- / -10	HB9EHP	-16 / -	5	✓ Closing fragment
08-25 03:47	20m	- / -	5Z4VJ	-10 / -	8	Partial capture
08-25 03:44	20m	- / -5	F1PBZ	+13 / -	2	✓ Closing fragment
08-25 02:08	20m	- / -4	WA4FU	-14 / -	2	✓ Closing fragment
08-23 01:59	20m	- / -	PD0PET	+4 / -	7	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
042530  +4 1629  KZ4SC F4FSY -18
042600 +13 2510  KZ4SC F6ECI JN05
042600 +12 1762  KZ4SC F4BPO JN36
042630  +7 2510  KZ4SC F6ECI JN05
042630 +10 1762  KZ4SC F4BPO R-21
042700 +12 2510  KZ4SC F6ECI JN05
042700 +11 1762  KZ4SC F4BPO R-18 (x9)

40m

UTC    dB Audio  Message
054045 -10 2144  KZ4SC DL1MEV JN58
054115 -16 1325  KZ4SC SV1OML KM18
054115 -15 2145  KZ4SC DL1MEV JN58
054145 -16 1325  KZ4SC SV1OML KM18
054145  -6 1143  KZ4SC PA3FRX JO22
054145 -12 2144  KZ4SC DL1MEV JN58
054215 -13 1325  KZ4SC SV1OML KM18 (x2)
054245 -14 1143  KZ4SC PA3FRX JO22
054315 -21 1325  KZ4SC SV1OML KM18
054315 -17 1141  KZ4SC IT9ODQ 73
054345 -10 2232  KZ4SC F4NGK IN95
055245  -3 2608  KZ4SC IZ2BKT JN55
055615 -20 2233  KZ4SC F4BJN JN25
061645 -18 1185  KZ4SC ON8WR JO11

20m

UTC    dB Audio  Message
071000  +8 2007  KZ4SC F4LNM R-22 (x4)
003730 -22 2177  KZ4SC F4JZW JN08
045715  -9 1860  KZ4SC RU3GF -03 (x2)
194915  +3  931  KZ4SC M9KTM IO91
194945 -19 1097  KZ4SC ON1JP -12
194945  +2  931  KZ4SC M9KTM R-19 (x2)
195130 -15  306  SP2LPI KZ4SC RRR
195415 +14  306  KZ4SC F4JVF IN95 (x2)
200830 -24 1808  US5ZCO KZ4SC RRR

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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