R3KJM — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO90

Receiver-side FT8 activity involving R3KJM, decoded by SO8OO in southeastern Poland. 40 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-08-12 and 2026-11-02.

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 40 FT8 messages attributed to R3KJM as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (63%), followed by 20 m (20%) and 40 m (18%). Several six-hour UTC windows tied for the largest share (80%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (63%); the estimated median was -19 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-19 dB

Estimated median S/N

Bands

80m · 25 40m · 7 20m · 8

First attributed message: 2026-08-12
Last attributed message: 2026-11-02 17:50 UTC

Observed FT8 message patterns

Attributed sample: 40 messages
Active dates: 6 UTC dates
Estimated median S/N: -19 dB
Estimated 10th-90th percentile: -24 to -8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 25, moderate (-15 to -9 dB) 9, strong (≥ -8 dB) 6.

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 R3KJM in decoded directed-looking exchanges:

UB0SMX/P · Asiatic Russia RA1OD · European Russia S53AK · Slovenia R3EDI · European Russia R3PLA · European Russia R3VE · European Russia R3YAU · European Russia RA3TVW · European Russia RA4FHO · European Russia RM5F · European Russia RN3QTS · European Russia RQ7O · 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 R3KJM

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: KO90 · 11 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,223 km (approx.)
Last such locator decoded: 2026-11-02 17:50 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	R3KJM S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-05 19:59	80m	- / +6	RL3QGD	-19 / -	2	Partial capture
11-02 18:16	80m	- / -19	RZ3DAB	-8 / -	2	✓ Closing fragment
11-02 17:55	80m	- / -22	R3PLA	-2 / -	3	✓ Closing fragment
11-02 17:53	80m	- / -10	UC6D	+3 / -	3	✓ Closing fragment
10-30 18:42	80m	- / -	R3PLA	-10 / -	2	Partial capture
10-30 18:41	80m	- / -9	UA3GJM	-8 / -	2	Partial capture
10-04 15:52	80m	-24 / -16	RN3QTS	-5 / -	4	✓ Closing observed
10-04 15:52	80m	-22 / -9	RQ7O	+7 / 0	5	✓ Full exchange observed
10-04 15:49	80m	-18 / -11	UA4FKT	+10 / -	7	✓ Closing observed
09-11 18:51	40m	-10 / -	RA3P	- / -12	2	Partial capture
09-11 18:44	40m	-8 / -	SP6FME	-15 / -3	2	Partial capture
09-11 18:41	40m	-10 / -18	S53AK	+8 / -	4	✓ Closing observed
09-10 19:46	80m	- / -	UA4FKT	+4 / -	3	Partial capture
09-10 19:40	80m	-11 / -2	RA4FHO	-2 / -	4	✓ Closing observed
09-10 19:36	80m	-23 / -	UA4FKT	+1 / 0	4	Partial capture
09-10 19:34	80m	-20 / -4	R3YAU	+2 / +3	6	✓ Full exchange observed
09-10 19:31	80m	-12 / -	UB3ANV	- / -17	2	Partial capture
09-10 19:20	80m	-16 / -	UA4FKT	-1 / +2	2	Partial capture
09-10 19:19	80m	-20 / -19	UA4POO	-18 / -9	4	✓ Full exchange observed
09-10 19:17	80m	-20 / -20	R3VE	-14 / -	4	✓ Closing observed
08-27 07:03	40m	- / 0	UI6O	-14 / -	2	Partial capture
08-26 12:32	20m	-9 / -	UB0SMX/P	- / -13	5	✓ Closing fragment
08-26 12:26	20m	-20 / -	RZ3Z/P	- / -12	3	Partial capture
08-12 19:57	80m	- / -11	R3ICU	-13 / -	2	Partial capture
08-12 19:52	80m	-24 / -	R3ICU	-16 / -14	3	Partial capture
08-12 19:51	80m	-24 / -14	RM5F	-6 / +4	4	✓ Full exchange observed
08-12 19:50	80m	-24 / -12	RZ6CO	0 / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
184200 -10 2043  R3KJM R3PLA KO84 (x2)
184330  -5 1079  R3KJM UA3GJM -06
175000 -17  367  LZ911TD R3KJM KO90
175315 -19 1908  R3KJM RX3DRC R-21
175345  +5 1058  R3KJM UC6D KN95 (x3)
175515  -6 1058  R3KJM R3PLA KO84 (x3)
181645 -10 2280  R3KJM RZ3DAB -19 (x2)
195945 -21 1072  R3KJM RL3QGD KO91 (x2)

40m

UTC    dB Audio  Message
070300 -12  937  R3KJM UI6O +00 (x2)
181945 -24 2372  9A/DK9RC R3KJM KO90
184115 -12 1270  S53AK R3KJM KO90
184130  +7 1038  R3KJM S53AK -18 (x2)
184215  -7 1270  S53AK R3KJM 73
184230  -9 1266  R3KJM R6DJR -04
184415  -9 1270  RA1OD R3KJM 73
184430 -15 1271  R3KJM SP6FME JO90
184445  -8 1270  SP6FME R3KJM -03
185145 -14 2468  RA3P R3KJM -12 (x2)
060830  -3  583  R3KJM RA1TL -20

20m

UTC    dB Audio  Message
122645 -24 2344  RZ3Z/P R3KJM KO90 (x3)
123215 -11 2413  UB0SMX/P R3KJM KO90 (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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee