R4FDW — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LO23

Receiver-side FT8 activity involving R4FDW, decoded by SO8OO in southeastern Poland. 15,580 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 69 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-08-30.

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 15,580 FT8 messages attributed to R4FDW as the transmitting token by decoded message structure across 69 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%), followed by 10 m (0%). The busiest six-hour window was 14:00-20:00 UTC, containing 41% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13.2 dB.

Overview

15,580

Messages attributed

UTC dates decoded

1,471

Active 15-min windows

-13.2 dB

Estimated median S/N

Bands

20m · 15,578 10m · 2

First attributed message: 2026-06-06
Last attributed message: 2026-08-30 06:38 UTC

Observed FT8 message patterns

Attributed sample: 15,580 messages
Active dates: 69 UTC dates
Estimated median S/N: -13.2 dB
Estimated 10th-90th percentile: -21 to -3.1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5,739, moderate (-15 to -9 dB) 5,947, strong (≥ -8 dB) 3,894.

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 R4FDW in decoded directed-looking exchanges:

IK4LZH · Italy ×7 LZ1ZF · Bulgaria ×4 TA2ED · Asiatic Turkey ×3 EW8FG · Belarus ×3 UA1WA · European Russia ×2 R8ACF · Asiatic Russia ×2 CT1BFP · Portugal ×2 HA3GX · Hungary ×2 BY8SCX · China ×2 PD2WL · Netherlands ×2 SP9JMZ · Poland ×2 VU2FR · India ×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 R4FDW

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: LO23 · 7,393 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,639 km (approx.)
Last such locator decoded: 2026-08-30 06:19 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	R4FDW S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-08 06:24	40m	- / -13	RK3YWA	-8 / -	4	✓ Closing fragment
08-30 06:28	20m	-7 / -	R6OH	- / -8	2	Partial capture
08-30 06:13	20m	-15 / -	UT0IN	- / -4	9	Partial capture
08-30 06:06	20m	-8 / -	S57ESG	- / -18	9	Partial capture
08-30 06:01	20m	-7 / -	SP7FID	- / -12	4	Partial capture
08-30 05:48	20m	-22 / -	I0KJX	- / -15	3	Partial capture
08-30 05:39	20m	-7 / -	EA3GIW	- / -1	12	Partial capture
08-30 05:32	20m	-8 / -	OK1IG	- / -5	13	Partial capture
08-30 05:26	20m	-7 / -	UT7NY	- / -4	13	Partial capture
08-30 05:19	20m	-12 / -	US2YW	- / +3	11	Partial capture
08-30 05:14	20m	-17 / -	<...>	- / -11	2	Partial capture
08-29 20:12	20m	- / -8	F8AGD	-5 / -	2	✓ Closing fragment
08-29 19:24	20m	- / -7	IZ4TOA	-3 / -	2	✓ Closing fragment
08-29 17:17	20m	- / +2	DL2TT	+8 / -	2	✓ Closing fragment
08-29 17:16	20m	- / -9	IK3SCB	+10 / -	2	✓ Closing fragment
08-29 16:58	20m	- / -24	DK3BT	-16 / -	2	✓ Closing fragment
08-29 16:52	20m	- / +9	IU2BEE	-8 / -	2	✓ Closing fragment
08-29 16:50	20m	- / -18	DN5KBG	-6 / -	2	✓ Closing fragment
08-29 16:35	20m	- / -11	DF9CY	+7 / -	2	✓ Closing fragment
08-29 15:54	20m	- / -	DJ1OJ	-8 / -	2	✓ Closing fragment
08-29 14:22	20m	- / -17	IS0BQE	+8 / -	2	✓ Closing fragment
08-29 14:08	20m	-16 / -	YO5PZ	- / -9	2	✓ Closing fragment
08-29 14:01	20m	-7 / -	BD8FOD	- / -13	7	Partial capture
08-29 13:58	20m	-11 / -	DG0OCG	- / -16	3	Partial capture
08-29 08:45	20m	- / -12	I2SVA	+5 / -	3	✓ Closing fragment
08-29 08:29	20m	- / -3	R7KQ	-6 / -	3	✓ Closing fragment
08-29 08:21	20m	- / -	F4JZW	+1 / -	3	Partial capture
08-29 07:32	20m	- / -11	IU2IKT	+6 / -	2	✓ Closing fragment
08-29 05:33	20m	- / -5	YT5R	+3 / -	2	✓ Closing fragment
08-28 10:31	10m	- / -	DL5MR	-8 / -	2	Partial capture
08-27 11:55	20m	-10 / -	2E1HAT	- / -11	3	Partial capture
08-27 11:48	20m	-10 / -	BG5CNL	- / -10	8	Partial capture
08-27 11:41	20m	-10 / -	ON3EBR	- / -7	2	Partial capture
08-27 11:27	20m	-12 / -	IW8ELR	- / -9	8	Partial capture
08-27 11:22	20m	-11 / -	JA2ATE	- / -9	3	Partial capture
08-27 11:16	20m	-5 / -	JA4IXI	- / -15	8	Partial capture
08-27 11:11	20m	-5 / -	<...>	- / -9	5	Partial capture
08-27 11:09	20m	-6 / -	DB4MS	- / -14	3	Partial capture
08-27 10:43	20m	-5 / -	SP3DT	- / -16	4	Partial capture
08-27 10:25	20m	-5 / -16	PD3BW	-16 / -8	3	Partial capture
08-27 10:19	20m	-6 / -	G4FVZ	- / -6	2	Partial capture
08-27 10:02	20m	-12 / -	GM4SJB	- / -11	4	Partial capture
08-27 09:54	20m	-6 / -	SP5HQZ	- / -1	3	Partial capture
08-27 09:08	20m	-6 / -	DL3MN	- / -8	2	Partial capture
08-27 08:56	20m	-8 / -	MW7IHR	- / -12	10	Partial capture
08-27 08:47	20m	-11 / -	DG4MCB	- / -12	11	Partial capture
08-27 08:41	20m	-18 / -	PA3DOE	- / -17	8	Partial capture
08-27 08:32	20m	-9 / -	LY3QR	- / -4	9	Partial capture
08-27 08:30	20m	-6 / -	DM1JPM	- / -6	5	✓ Closing fragment
08-27 08:21	20m	-13 / -	G8KLC	- / -13	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
214700 -11 1934  R4FDW 9A4ZM JN86 (x2)
060115 -24 2040  R4FDW RN3RC 73
154045 -19 1287  R4FDW RA3AJT 73
161930 -17 1418  R4FDW RW3PL 73
165900 -17 1287  R4FDW RZ6L KN97
170130 -11  849  R4FDW UA3PTY R-13
174645 -12 1645  R4FDW R6ODX R-12
183300 -16 2358  R4FDW R2DOD R-11
183600  -8 1685  R4FDW R2RCQ KO85 (x2)
062400  -9 2443  R4FDW RK3YWA R-13 (x4)

20m

UTC    dB Audio  Message
061215 -10 1942  S57ESG R4FDW -18
061300 -13 1942  UT0IN R4FDW -04 (x9)
061915 -13 1942  CQ R4FDW LO23 (x2)
062830  -6 1822  R6OH R4FDW -08 (x2)
063830  -1 1809  R7FN R4FDW -14

10m

UTC    dB Audio  Message
194115 -15 1476  R4FDW R7NO RR73
194400 -18 2379  SP9UPH R4FDW -12
195445  -2 1778  R4FDW EA8UP R-07 (x2)
203845 -24 1911  R4FDW OH3GGQ KP20
074845 -18 1505  R4FDW LZ2CP R-15
075545  +2  476  R4FDW R6AA 73
081845 -14 1539  R4FDW TA7ARH R-16 (x3)
082615  -5 1416  R4FDW LZ2CP R+00 (x3)
103130 -10 1378  R4FDW DL5MR JO60 (x2)

80m

UTC    dB Audio  Message
202245 -12 2657  R4FDW R4NBV R-22 (x2)
190230  +5 1696  R4FDW SQ5PTZ KO02

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.

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