R4KK — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LO53

Receiver-side FT8 activity involving R4KK, decoded by SO8OO in southeastern Poland. 118 FT8 messages attributed to this token as transmitter, on 80m, 20m, across 10 UTC dates in the available aggregate history. Observed between 2026-07-12 and 2026-09-03.

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 118 FT8 messages attributed to R4KK as the transmitting token by decoded message structure across 10 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (97%), followed by 80 m (3%). Several six-hour UTC windows tied for the largest share (71%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

118

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

80m · 3 20m · 115

First attributed message: 2026-07-12
Last attributed message: 2026-09-03 23:02 UTC

Observed FT8 message patterns

Attributed sample: 118 messages
Active dates: 10 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -20 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 39, moderate (-15 to -9 dB) 35, strong (≥ -8 dB) 44.

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 R4KK in decoded directed-looking exchanges:

4X1UF · Israel F6FDY · France IZ5SIH · Italy EA1A · Spain EU1FQ · Belarus EU4U · Belarus IK4LZH · Italy LZ3DC · Bulgaria OM7AMA · Slovak Republic OS4K · Belgium R2PA · European Russia R3IX · 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 R4KK

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: LO53 · 54 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,036 km (approx.)
Last such locator decoded: 2026-09-03 23:01 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	R4KK S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-03 23:02	80m	- / -	UA4FKT	+8 / -	4	Partial capture
09-03 23:01	80m	-9 / -11	R2EA	+2 / -9	5	✓ Full exchange observed
08-28 05:42	40m	- / -5	RN1TV	-2 / -	2	✓ Closing fragment
08-24 09:56	20m	- / -16	R3NCG	+5 / -	3	✓ Closing fragment
08-24 05:52	20m	-10 / -	R6LKG	-14 / -13	5	✓ Closing observed
08-24 05:50	20m	-7 / -9	YO4NT	-11 / -	4	✓ Closing observed
08-24 05:48	20m	-8 / -	EW6PG	- / -22	2	Partial capture
08-24 05:35	20m	- / -9	R6OQ	+1 / -	4	✓ Closing fragment
08-24 05:34	20m	-3 / -	SQ9CXH	- / -16	2	Partial capture
08-24 04:49	20m	0 / -	R3IX	- / -13	5	✓ Closing fragment
08-24 04:40	20m	+6 / -	E74K	- / -	2	Partial capture
08-24 04:37	20m	+1 / -	RO6K	- / -16	3	✓ Closing fragment
08-23 15:07	20m	-15 / -	RU3T	- / -	4	Partial capture
08-23 13:04	20m	-18 / -	RU6FK	- / -	2	Partial capture
08-17 16:40	20m	-8 / -	R3BAV	- / -13	2	Partial capture
08-17 15:47	20m	-21 / -	R3CE	- / -7	2	Partial capture
08-17 15:43	20m	-15 / -	R7CD	- / -7	3	✓ Closing fragment
08-16 19:15	20m	- / -5	UB1OBV	-22 / -	2	Partial capture
08-16 18:57	20m	- / -7	RA3Y	-12 / -	2	✓ Closing fragment
08-16 18:42	20m	- / +1	R3MDA	-14 / -	2	✓ Closing fragment
07-21 11:08	10m	- / -16	IZ5SIH	-10 / -	2	✓ Closing fragment
07-20 10:37	20m	-16 / -	EU1FQ	- / 0	2	✓ Closing fragment
07-20 10:33	20m	- / -21	PD1ADA	-13 / -	3	Partial capture
07-20 10:30	20m	-19 / -	R3DDS	- / -16	2	Partial capture
07-18 14:37	20m	-18 / -13	SV1CQN	-24 / -	2	Partial capture
07-18 14:32	20m	-13 / -	R2FBW	- / -	3	Partial capture
07-18 14:28	20m	-16 / -	R3KGN	- / -3	3	✓ Closing fragment
07-18 14:11	20m	- / +5	SV2HTW	-8 / -	2	✓ Closing fragment
07-17 16:38	20m	- / -	EA5AR	-10 / -	2	Partial capture
07-17 16:31	20m	-20 / -	R9FAK	- / -	2	✓ Closing fragment
07-17 16:23	20m	-15 / -	UB8LAR	- / -6	4	Partial capture
07-17 16:18	20m	-20 / -	BH4XBU	- / -14	2	Partial capture
07-17 16:12	20m	-14 / -	UA4AOC	- / -6	2	✓ Closing fragment
07-17 16:05	20m	-16 / -	<...>	- / -20	2	Partial capture
07-17 16:01	20m	-2 / -1	LZ3DC	-5 / -26	10	✓ Full exchange observed
07-17 15:32	20m	-10 / -	OM3DX	- / -4	2	Partial capture
07-17 15:30	20m	-3 / -	UT7UJ	- / -	4	Partial capture
07-17 15:28	20m	-8 / -	YO4DW	- / -17	2	Partial capture
07-17 10:02	20m	- / -4	RL3K	-14 / -	2	Partial capture
07-17 09:57	20m	-14 / -8	IK4LZH	+2 / -14	3	✓ Full exchange observed
07-17 08:14	20m	- / +1	RN6LPC	-12 / -	2	Partial capture
07-17 08:07	20m	- / -	PD2WL	-21 / -	3	Partial capture
07-17 08:04	20m	- / -	PD2WL	-18 / -	2	Partial capture
07-17 08:03	20m	-19 / -	SA3SHN	- / -9	2	✓ Closing fragment
07-16 16:56	20m	-17 / -	BI4KVT	- / -19	3	Partial capture
07-16 15:55	20m	-18 / -	SP3DOF	- / -7	4	✓ Closing fragment
07-16 15:38	20m	- / -	RA6FSV	-17 / -	3	Partial capture
07-16 15:37	20m	-2 / -	EU4U	- / -10	3	✓ Closing fragment
07-16 15:36	20m	-2 / -	GU0SUP	- / -	2	Partial capture
07-16 15:26	20m	- / -11	R6AC	-18 / -	4	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
230100 -10  999  R2EA R4KK LO53
230115  +3 2337  R4KK R2EA -11
230130 -10  999  R2EA R4KK R-09
230145  +1 2336  R4KK R2EA RR73
230200  -6  999  R2EA R4KK 73
230215 +11  999  R4KK UA4FKT LO23 (x4)

40m

UTC    dB Audio  Message
165800  -7 1261  R4KK R7CD +13 (x3)
054200  +0  638  R4KK RN1TV -05 (x2)

20m

UTC    dB Audio  Message
054815 -11 1569  EW6PG R4KK LO53 (x2)
055000 -11 1321  R4KK YO4NT -09 (x3)
055115  -7 1569  YO4NT R4KK 73
055200 -13  344  R4KK R6LKG LN07 (x2)
055245  -8 1569  R6LKG R4KK -13 (x2)
055330 -13  343  R4KK R6LKG 73
091345 -16 1568  R8LDJ R4KK LO53
095630  +2  908  R4KK R3NCG -16 (x3)

10m

UTC    dB Audio  Message
074330  -7  379  R4KK EK/RX3DPK +02
074715 -13  260  R4KK 4X1UF RR73
092445 -18  913  R4KK RA7KW KN74
110815  -9 2389  R4KK IZ5SIH -16 (x2)
165430 -19 1532  R4KK F4HMP -10
170300 -21 1346  R4KK F6FDY RR73

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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