R4KB — 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 R4KB, decoded by SO8OO in southeastern Poland. 58 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, across 6 UTC dates in the available aggregate history. Observed between 2026-09-03 and 2026-09-20.

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 58 FT8 messages attributed to R4KB as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (45%), followed by 80 m (31%) and 160 m (24%). Several six-hour UTC windows tied for the largest share (86%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-14 dB

Estimated median S/N

Bands

160m · 14 80m · 18 40m · 26

First attributed message: 2026-09-03
Last attributed message: 2026-09-20 03:03 UTC

Observed FT8 message patterns

Attributed sample: 58 messages
Active dates: 6 UTC dates
Estimated median S/N: -14 dB
Estimated 10th-90th percentile: -18 to -2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 17, moderate (-15 to -9 dB) 22, 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.

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with R4KB in decoded directed-looking exchanges:

OA4ENG · Peru OE8DDX · Austria RW4CB · 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 R4KB

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 · 51 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,036 km (approx.)
Last such locator decoded: 2026-09-20 03:03 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	R4KB S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 03:03	40m	-6 / -	W3L	- / -	2	Partial capture
09-20 02:41	80m	-7 / -	HI8R	- / -	2	Partial capture
09-20 02:37	80m	-16 / -	HI8R	- / -	2	Partial capture
09-20 02:36	80m	-16 / -	TF3VS	- / -	2	Partial capture
09-20 02:26	80m	0 / -	TF3VS	- / -	6	Partial capture
09-20 02:17	80m	-8 / -	TF3VS	- / -	4	Partial capture
09-20 02:02	80m	-2 / -	TF3VS	- / -	2	Partial capture
09-19 02:09	160m	-15 / -	KP4AA	- / -	5	Partial capture
09-19 02:00	160m	-17 / -	KP4AA	- / -	8	Partial capture
09-18 03:48	40m	-10 / -	KI4R	- / -	2	Partial capture
09-18 03:42	40m	-17 / -	WB7PHM	- / -	2	Partial capture
09-18 03:37	40m	-10 / -	HK3TY	- / -	2	Partial capture
09-18 03:29	40m	-17 / -	OE8DDX	- / -6	3	✓ Closing fragment
09-18 02:43	40m	-9 / -	EP2AES	- / -	3	Partial capture
09-17 02:53	40m	-9 / -	OA4ENG	- / -12	3	✓ Closing fragment
09-09 14:03	40m	- / -	SP9UPH	-1 / -	3	Partial capture
09-09 13:55	40m	- / -1	RW4CB	-9 / -	2	✓ Closing fragment
09-09 13:54	40m	-13 / -	UA9UFG	- / -20	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
024415  -8  337  EP2AES R4KB LO53
032915 -21 1328  OE8DDX R4KB LO53 (x3)
033030  +1 1046  R4KB RM5F KO85
033745  -8 1328  HK3TY R4KB LO53 (x2)
034000 -16 1329  K5HQ R4KB LO53
034230 -19 1328  WB7PHM R4KB LO53 (x2)
034430 -18  891  WA2TMF R4KB LO53
034800 -11  323  KI4R R4KB LO53 (x2)
030300  -6  329  W3L R4KB LO53 (x2)

80m

UTC    dB Audio  Message
021815  -7 1412  TF3VS R4KB LO53 (x5)
022830  +6  901  R4KB DL1VVQ -09
022845  +6 2855  TF3VS R4KB LO53 (x5)
023730 -18 1973  HI8R R4KB LO53 (x4)

160m

UTC    dB Audio  Message
193645 -21  895  RI1FJL R4KB LO53
020045 -16 2075  KP4AA R4KB LO53 (x13)

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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