RK3DJW — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO85

Receiver-side FT8 activity involving RK3DJW, decoded by SO8OO in southeastern Poland. 910 FT8 messages attributed to this token as transmitter, on 40m, across 6 UTC dates in the available aggregate history. Observed between 2026-09-13 and 2026-09-21.

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 910 FT8 messages attributed to RK3DJW 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 (100%). Most decodes (70%) fell within the six-hour window 13:00-19:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (69%); the estimated median was -4 dB.

Overview

910

Messages attributed

UTC dates decoded

Active 15-min windows

-4 dB

Estimated median S/N

Bands

40m · 910

First attributed message: 2026-09-13
Last attributed message: 2026-09-21 17:03 UTC

Observed FT8 message patterns

Attributed sample: 910 messages
Active dates: 6 UTC dates
Estimated median S/N: -4 dB
Estimated 10th-90th percentile: -15 to +6 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 87, moderate (-15 to -9 dB) 196, strong (≥ -8 dB) 627.

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 RK3DJW in decoded directed-looking exchanges:

RA3RPW · European Russia ×2 RW3PI · European Russia ×2 SM7TZK · Sweden ×2 9A5E · Croatia 9K2WA · Kuwait BA7IWL · China BI3AMG · China BI3UPU · China DC9GT · Fed. Rep. of Germany DF3IS · Fed. Rep. of Germany DJ0MAB · Fed. Rep. of Germany DK1XAM · Fed. Rep. of Germany

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 RK3DJW

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: KO85 · 441 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,193 km (approx.)
Last such locator decoded: 2026-09-21 14:45 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	RK3DJW S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-21 17:03	40m	+4 / -	SQ8AA	- / -4	2	Partial capture
09-21 17:00	40m	+4 / -	OH3SW	- / -4	3	Partial capture
09-21 15:03	40m	+2 / -	UN2NC	- / -9	2	Partial capture
09-21 14:48	40m	-2 / -	BG2ATH	- / -4	3	Partial capture
09-21 14:42	40m	- / +3	RW3SB	-9 / -	3	✓ Closing fragment
09-21 14:35	40m	-3 / -13	US1EA	0 / -9	7	✓ Full exchange observed
09-21 14:32	40m	- / +9	R4ZZ	-6 / -	2	✓ Closing fragment
09-21 14:30	40m	0 / -	BI3UPU	- / -16	2	✓ Closing fragment
09-21 14:28	40m	+1 / -	YD1HFH	- / -17	5	Partial capture
09-21 14:26	40m	-6 / -	RW0AE	- / -7	2	Partial capture
09-21 14:24	40m	-6 / -18	ON3MOH	-6 / -16	4	✓ Full exchange observed
09-21 14:16	40m	-3 / -	PD1CBH	-8 / -14	13	Partial capture
09-21 14:16	40m	-4 / -	R3PLA	- / -18	3	Partial capture
09-21 14:15	40m	- / -25	DL6KA	-14 / -	4	Partial capture
09-21 14:12	40m	-8 / +2	RA6FUN	+5 / +5	3	✓ Full exchange observed
09-21 14:12	40m	-4 / +3	R4FS	-10 / +6	4	✓ Full exchange observed
09-21 14:11	40m	- / +7	UA3YFS	-6 / -	3	✓ Closing fragment
09-21 14:03	40m	0 / -	R9OFA	- / -16	3	Partial capture
09-21 14:01	40m	-4 / -	YF1CAR	- / -	3	Partial capture
09-21 13:52	40m	-4 / -	SP5AKI	- / -	3	Partial capture
09-21 13:38	40m	-5 / -	YF1CAR	- / -	3	Partial capture
09-21 13:30	40m	-3 / -	RA0SCA	- / -	2	Partial capture
09-21 13:29	40m	-8 / -	RA0WBI	- / -	2	Partial capture
09-21 13:26	40m	-4 / -	OH5KZ	- / 0	4	✓ Closing fragment
09-21 13:25	40m	-3 / -	UA3POG	- / -	3	✓ Closing fragment
09-21 13:23	40m	-8 / -	YB1KXV	- / -	3	Partial capture
09-21 08:31	40m	-10 / -	SQ7JHS	- / -	2	Partial capture
09-21 06:39	40m	-8 / -	RK6MC	- / 0	2	Partial capture
09-21 06:19	40m	- / -5	OZ6G	+4 / -	2	✓ Closing fragment
09-21 06:11	40m	-3 / 0	SQ9SET	-7 / -4	4	Partial capture
09-21 06:07	40m	-5 / -	SQ9SET	- / -10	2	Partial capture
09-21 06:07	40m	- / 0	DH1NGL	-6 / -	6	Partial capture
09-21 06:06	40m	- / -9	YO2UKG	+16 / -	3	✓ Closing fragment
09-21 06:03	40m	-4 / -6	SP5HQZ	+1 / -2	3	Partial capture
09-21 06:02	40m	- / -15	9A5E	+7 / -	2	✓ Closing fragment
09-21 05:57	40m	-11 / -7	DJ0MAB	-2 / -6	4	✓ Full exchange observed
09-21 05:56	40m	-6 / -14	YO4FJK	0 / -13	4	✓ Full exchange observed
09-21 05:54	40m	-7 / -14	ON4CFC	-8 / -18	4	✓ Full exchange observed
09-21 05:53	40m	-7 / -1	SP4MPH	+6 / +9	4	✓ Full exchange observed
09-21 05:52	40m	-6 / -	R6AC	- / -10	2	✓ Closing fragment
09-21 05:49	40m	-5 / -	R6ZL	-18 / +6	5	✓ Closing observed
09-21 05:49	40m	-6 / -	ON4CFC	- / -16	3	Partial capture
09-21 05:46	40m	-7 / -	4X1UF	- / -18	3	Partial capture
09-21 05:45	40m	-10 / -	SQ8V	- / -5	2	Partial capture
09-21 05:44	40m	-5 / -	PA3EVY	- / -5	2	Partial capture
09-21 05:43	40m	-12 / -	YL2JZ	- / -	3	✓ Closing fragment
09-21 05:31	40m	-4 / -5	R3DMS	-7 / +1	5	✓ Full exchange observed
09-21 05:26	40m	-2 / -	OH5KNL	+4 / -	3	✓ Closing observed
09-21 05:22	40m	-3 / -	OT7K	- / 0	3	Partial capture
09-21 05:19	40m	-10 / -	RW3ZC	-4 / +3	3	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
144345  -6  324  RK3DJW RW3SB 73
144500  +3  325  CQ RK3DJW KO85 (x2)
144845  -1  325  BG2ATH RK3DJW -04 (x3)
150300  +2  340  UN2NC RK3DJW -09 (x2)
165715  -2  513  BG2ATH RK3DJW -04
165845  +4  513  JH5LCN RK3DJW -11
170015  +7  513  OH3SW RK3DJW -04 (x3)
170315  +5  550  SQ8AA RK3DJW -04 (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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