KC9NVN — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EN52

Receiver-side FT8 activity involving KC9NVN, decoded by SO8OO in southeastern Poland. 18 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-09-14.

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 18 FT8 messages attributed to KC9NVN as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (61%), followed by 40 m (39%). In this small sample, the estimated median decoder S/N was -20 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-20 dB

Estimated median S/N

Bands

40m · 7 20m · 11

First attributed message: 2026-06-10
Last attributed message: 2026-09-14 02:13 UTC

Observed FT8 message patterns

Attributed sample: 18 messages
Active dates: 4 UTC dates
Estimated median S/N: -20 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 11, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 5.

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 KC9NVN in decoded directed-looking exchanges:

HB9TIH · Switzerland 5B4AMM · Cyprus DJ0MAB · Fed. Rep. of Germany EA3AAY · Spain F4EMG · France F5VHQ · France GU4WRP · Guernsey IW2MYH · Italy NG2O · United States PA4PA · Netherlands RL9LR · Asiatic Russia SV9QWC · Crete

Most frequent locator attributed to KC9NVN

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: EN52 · 13 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 7,739 km (approx.)
Last such locator decoded: 2026-09-14 02:13 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	KC9NVN S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-21 05:39	80m	- / -16	GM6URC	-23 / -	4	Partial capture
09-21 05:38	80m	- / -7	EA6Y	-14 / -	2	✓ Closing fragment
09-21 05:36	80m	- / -	ON7GB	+8 / -	3	Partial capture
09-21 03:00	80m	- / -25	TF4M	+1 / -	6	Partial capture
09-21 00:16	40m	- / -9	W2NO	-18 / -	2	✓ Closing fragment
09-20 22:02	40m	- / -24	M0OVG	-8 / -	3	Partial capture
09-14 02:12	40m	-20 / -	W6Q	- / -	2	Partial capture
09-14 01:52	40m	- / -16	RW9WT	-16 / -	2	Partial capture
09-14 01:08	40m	- / -9	MI7XHT	-8 / -	2	Partial capture
09-13 23:42	40m	- / +3	GM6URC	-12 / -	4	Partial capture
09-13 23:41	40m	- / -8	PA4PA	+2 / -	2	✓ Closing fragment
09-12 05:58	40m	- / -16	DJ0MAB	0 / -	4	✓ Closing fragment
09-12 05:55	40m	- / -	DJ0MAB	0 / -	2	Partial capture
09-12 05:45	40m	- / -19	DL7GAL	-5 / -	3	Partial capture
09-05 06:48	40m	- / -9	F5VHQ	0 / -	4	✓ Closing fragment
09-03 01:23	40m	- / -20	IW2MYH	-9 / -	3	✓ Closing fragment
09-03 01:22	40m	- / -	9A4ZM	-12 / -	2	Partial capture
09-03 01:20	40m	- / -17	SV9QWC	-18 / -	3	✓ Closing fragment
08-26 06:59	40m	- / -22	F4EMG	-6 / -	3	✓ Closing fragment
08-25 03:50	40m	- / -9	GU4WRP	-14 / -	2	✓ Closing fragment
08-25 00:26	40m	- / -15	DL8TV	-22 / -	3	Partial capture
08-25 00:10	40m	- / -15	EA3AAY	-2 / -	3	✓ Closing fragment
07-19 00:11	20m	- / -	DL9KM	-13 / -	3	Partial capture
07-18 23:34	20m	- / -12	HB9TIH	-13 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
030045  +6 2513  KC9NVN TF4M -25 (x5)
053645  +9 1205  KC9NVN ON7GB JO21
053715 -20 1609  KC9NVN ON7HM JO10
053715  +8 1205  KC9NVN ON7GB JO21 (x2)
053815 -10 1950  KC9NVN EA6Y -07 (x2)
053915 -23 1779  KC9NVN GM6URC -16 (x4)

40m

UTC    dB Audio  Message
014415 -21 2144  W6Q KC9NVN EN52 (x2)
015015 -20 2144  W9OAW KC9NVN R-13
015230 -16 2146  KC9NVN RW9WT LO64 (x2)
015345 -21 2144  W6Q KC9NVN EN52 (x3)
220245  -9 1745  KC9NVN M0OVG -24 (x3)
231145 -10  455  KC9NVN NG2O RR73
000600 -17 2307  KC9NVN II9IAGM -02
001615 -20 2135  KC9NVN W2NO -09 (x2)

20m

UTC    dB Audio  Message
202515 -12 1677  KC9NVN G5TV IO93
000030  -9  542  KC9NVN 7X5CY -09
220715 -10 2058  KC9NVN TM8WWA +03
232045 -15 1393  KC9NVN K5ATN -16
233430 -11 2222  KC9NVN HB9TIH JN36 (x3)
001115 -14 1087  KC9NVN DL9KM JN68 (x3)

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