R5KH — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO91

Receiver-side FT8 activity involving R5KH, decoded by SO8OO in southeastern Poland. 2,959 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 28 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-02.

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 2,959 FT8 messages attributed to R5KH as the transmitting token by decoded message structure across 28 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (33%), followed by 80 m (28%) and 20 m (27%). The busiest six-hour window was 07:00-13:00 UTC, containing 48% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

2,959

Messages attributed

UTC dates decoded

361

Active 15-min windows

-12 dB

Estimated median S/N

Bands

160m · 51 80m · 839 40m · 307 20m · 786 10m · 976

First attributed message: 2026-06-07
Last attributed message: 2026-09-02 01:00 UTC

Observed FT8 message patterns

Attributed sample: 2,959 messages
Active dates: 28 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -23 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1,129, moderate (-15 to -9 dB) 783, strong (≥ -8 dB) 1,047.

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 R5KH in decoded directed-looking exchanges:

R50RKZ · European Russia ×4 RC9WC · Asiatic Russia ×3 R2EA/P · European Russia ×3 R1BED · European Russia ×2 RU3T · European Russia ×2 R2GBR · European Russia ×2 UI5A · European Russia ×2 RN6MA · European Russia ×2 RA3ZOM · European Russia ×2 R1TAX · European Russia ×2 UA3QNA · European Russia ×2 SP6AMI · Poland ×2

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 R5KH

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: KO91 · 2,265 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,221 km (approx.)
Last such locator decoded: 2026-09-02 01:00 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	R5KH S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-02 01:00	40m	-10 / -	TN8GD	- / -	2	Partial capture
09-02 00:57	40m	-10 / -	<...>	- / -4	2	Partial capture
09-02 00:50	160m	-22 / +1	UA6HJT	+6 / -	4	✓ Closing observed
09-02 00:47	160m	-22 / -9	UG4L	-7 / -16	4	✓ Full exchange observed
09-02 00:41	40m	-6 / -	PV8AJ	- / -	5	Partial capture
09-02 00:38	40m	-12 / -10	UK8OM	-6 / -1	4	✓ Full exchange observed
09-02 00:36	40m	-8 / -	PV8AJ	- / -	2	Partial capture
09-01 21:06	40m	- / -13	RW3YS	+8 / -	2	Partial capture
09-01 20:45	40m	-1 / -	RW3YS	- / -	2	Partial capture
09-01 20:22	80m	-3 / -	RD4CAF	- / -5	2	✓ Closing fragment
09-01 20:06	80m	-6 / -1	RA1TR	-12 / -2	3	✓ Full exchange observed
09-01 20:00	80m	-7 / -	UA6HFI	- / -6	7	✓ Closing fragment
09-01 19:15	80m	- / -9	US1EA	+3 / -	4	✓ Closing fragment
09-01 18:59	80m	-22 / -10	RV6ARZ	-12 / -1	4	✓ Full exchange observed
09-01 18:53	160m	- / -18	RL3FA	-13 / -	2	✓ Closing fragment
09-01 18:48	160m	-24 / -8	RA3RFT	-18 / -	3	✓ Closing observed
09-01 18:42	160m	- / -17	LZ2IP	+10 / -	2	✓ Closing fragment
09-01 18:39	160m	- / -6	RA6YDX	-10 / -	2	✓ Closing fragment
09-01 18:10	80m	-8 / -	R9FF	- / -	2	Partial capture
09-01 18:08	80m	-17 / -4	R3QS	0 / -	3	✓ Closing observed
09-01 16:35	80m	-7 / -	R9WEI	- / -	3	Partial capture
09-01 16:34	80m	-20 / -	R7HL	- / -	2	Partial capture
09-01 16:31	80m	-7 / -6	RK4PR	-14 / -1	7	✓ Full exchange observed
09-01 16:28	80m	-16 / -9	YO4NT	+2 / -7	5	✓ Full exchange observed
09-01 16:26	80m	-7 / -6	RU3X	-10 / 0	7	✓ Full exchange observed
08-31 18:55	160m	-18 / -	RZ6BS	- / -	2	Partial capture
08-31 18:54	160m	-18 / -6	R3GO	-4 / -1	5	✓ Full exchange observed
08-31 18:52	160m	-21 / -	UD8S	- / -19	3	✓ Closing fragment
08-31 18:51	160m	-21 / -1	RA7T	0 / -	3	✓ Closing observed
08-31 18:39	160m	- / -11	R3PA	-6 / -	2	✓ Closing fragment
08-31 18:35	160m	- / -1	R7MH	-13 / -	2	✓ Closing fragment
08-31 18:32	160m	-22 / -	RX3PX	- / -	2	Partial capture
08-31 18:25	160m	- / -15	RW3RN	-3 / -	2	✓ Closing fragment
08-31 18:19	160m	- / -17	UA3QNA	+8 / -	2	✓ Closing fragment
08-31 18:13	80m	-2 / -	RA3VMD	- / -10	3	✓ Closing fragment
08-31 18:12	80m	-3 / -1	RA3MU	-16 / 0	5	✓ Full exchange observed
08-31 18:10	80m	-12 / -8	RA6ALF	-12 / -4	6	✓ Full exchange observed
08-31 18:08	80m	-8 / +2	UA3YFL	+6 / +3	6	✓ Full exchange observed
08-31 18:06	80m	-3 / -	UA9LT	- / -12	2	✓ Closing fragment
08-31 17:55	40m	-13 / -	R9FFJ	- / -5	2	✓ Closing fragment
08-31 17:51	40m	-14 / -14	R3YK	-2 / -2	5	✓ Full exchange observed
08-31 17:49	40m	-12 / -10	R1LH	-15 / -	4	✓ Closing observed
08-31 17:46	40m	-8 / -5	R6LQU	-5 / +1	4	✓ Full exchange observed
08-31 16:24	40m	-23 / -	RA9LL	-23 / -	2	✓ Closing observed
08-31 16:22	40m	-19 / -	R8FH	- / -	2	Partial capture
08-31 16:20	40m	-19 / -10	R3PJV	-18 / -	2	✓ Closing observed
08-31 16:16	40m	- / -3	R3NCG	-19 / -	3	✓ Closing fragment
08-30 18:30	80m	- / -5	RC9WC	-18 / -	2	✓ Closing fragment
08-30 18:29	80m	- / -3	R7OF	-2 / -	2	✓ Closing fragment
08-30 18:25	80m	- / -23	UA6CEY	-2 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
003630  -9 1660  PV8AJ R5KH KO91
003845  -8 1498  R5KH UK8OM -10
003900 -12 1601  UK8OM R5KH R-01
003915  -5 1498  R5KH UK8OM RR73
003930 -11 1601  UK8OM R5KH 73
004130 -10 1342  PV8AJ R5KH KO91 (x5)
005745  -8 1481  <...> R5KH KO91
005800  -1 2735  R5KH EK/RX3DPK -07
005815 -11 1481  <...> R5KH R-04
010015  -3 1481  TN8GD R5KH KO91 (x2)

160m

UTC    dB Audio  Message
184800 -16 2044  R5KH RA3RFT -08 (x2)
184845 -24 1499  RA3RFT R5KH 73
184915 -22 1499  RN3TT R5KH KO91
185300 -22 1860  R5KH RL3FA -18 (x2)
185545 -24 1517  RA3ZK R5KH KO91
004745  -7  788  R5KH UG4L -09
004800 -22 1301  UG4L R5KH R-16
004815  -7  788  R5KH UG4L RR73
004830 -21 1301  UG4L R5KH 73
005045 -21 1301  UA6HJT R5KH KO91 (x2)
005215  +7  622  R5KH UA6HJT +01 (x2)

80m

UTC    dB Audio  Message
201600 +11 1485  CQ R5KH KO91
201630  +7 1485  R2UC R5KH R+00
201730  +8 1485  CQ R5KH KO91 (x10)
202230  -5 1485  RD4CAF R5KH R-05 (x2)
202430  +5 1485  CQ R5KH KO91

20m

UTC    dB Audio  Message
085800  +7 2223  CQ R5KH KO91 (x3)
085930  +4 2223  R4PEQ R5KH R-11 (x2)
090015 +12  341  R5KH F8PDR IN98
090030  +2 2223  CQ R5KH KO91
090045  +1 2223  R5KH F8PDR IN98
090100  +5 2223  F8PDR R5KH -21
090115  -2 2224  R5KH F8PDR R+02
090130  +6 2223  F8PDR R5KH RR73
090145  +4 2224  R5KH F8PDR 73
090200  +7 2223  CQ R5KH KO91 (x3)

10m

UTC    dB Audio  Message
083630 -20 2134  RA3ZH R5KH -17
084630 -24 2134  CQ R5KH KO91                          a1
085715 -14 2318  R5KH LZ1BT R-04 (x2)
090400 -22 2134  CQ R5KH KO91
091215  +0 2733  R5KH F1PBZ -19 (x3)
095145  -5 2310  R5KH SV2AOB +05 (x2)
133245 -19 1509  R5KH IZ7KYS JN90 (x5)

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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