KK4DUP — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EM76

Receiver-side FT8 activity involving KK4DUP, decoded by SO8OO in southeastern Poland. 62 FT8 messages attributed to this token as transmitter, on 20m, across 14 UTC dates in the available aggregate history. Observed between 2026-06-07 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 62 FT8 messages attributed to KK4DUP as the transmitting token by decoded message structure across 14 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Several six-hour UTC windows tied for the largest share (98%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-15 dB

Estimated median S/N

Bands

20m · 62

First attributed message: 2026-06-07
Last attributed message: 2026-08-28 01:28 UTC

Observed FT8 message patterns

Attributed sample: 62 messages
Active dates: 14 UTC dates
Estimated median S/N: -15 dB
Estimated 10th-90th percentile: -20 to -8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 27, moderate (-15 to -9 dB) 23, strong (≥ -8 dB) 12.

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 KK4DUP in decoded directed-looking exchanges:

5B4AMM · Cyprus A71XX · Qatar LX1TI · Luxembourg N6VMO · United States RK4H · European Russia

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 KK4DUP

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: EM76
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,028 km (approx.)
Last such locator decoded: 2026-08-28 01:28 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	KK4DUP S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-30 21:13	20m	- / -	G0OSK	+12 / -	2	Partial capture
08-28 23:08	20m	- / -	EA5HM	+11 / -	5	Partial capture
08-26 21:41	20m	-17 / -	N6VMO	- / -12	7	✓ Closing fragment
08-25 00:19	20m	-14 / -	ZX3P	- / -19	10	Partial capture
08-25 00:16	20m	-10 / -	KC0FSH	- / -11	4	Partial capture
08-22 22:26	20m	- / -2	N2SCJ	-18 / -	2	Partial capture
08-22 21:54	20m	- / -19	K0BFG	-6 / -	5	Partial capture
08-10 00:41	20m	- / -16	IW4AOT	-4 / -	2	Partial capture
07-30 20:06	20m	- / -	PD1ADA	-21 / -	2	Partial capture
07-30 04:15	20m	- / -5	LX1TI	-4 / -	4	✓ Closing fragment
07-29 20:45	20m	- / -	F5OYA/P	-5 / -	27	Partial capture
07-23 22:03	20m	- / -4	EP5TJS	-10 / -	3	Partial capture
07-21 04:10	20m	- / -11	A71XX	-18 / -	2	✓ Closing fragment
07-19 03:01	20m	- / -14	RK4H	-8 / -	2	✓ Closing fragment
07-19 02:58	20m	- / -	RK4H	-3 / -	2	Partial capture
07-16 00:01	20m	- / -10	5B4AMM	-15 / -	3	✓ Closing fragment
07-14 21:58	20m	- / -17	RN6MA	-10 / -	2	Partial capture
07-11 21:12	20m	- / -	EB5AFK	-8 / -	2	Partial capture
06-30 19:52	20m	- / -	G4DBW	0 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
214215 -19  980  N6VMO KK4DUP -12 (x6)
214530 -10  895  KK4DUP MI7XHT IO64
012815 -21 1639  VA7LWK KK4DUP EM76
230800 +13 1526  KK4DUP EA5HM IM99 (x5)
211330 +10 2274  KK4DUP G0OSK IO91 (x2)

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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