RD4WM — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LO66

Receiver-side FT8 activity involving RD4WM, decoded by SO8OO in southeastern Poland. 515 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 15 UTC dates in the available aggregate history. Observed between 2026-06-12 and 2026-09-19.

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 515 FT8 messages attributed to RD4WM as the transmitting token by decoded message structure across 15 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (56%), followed by 20 m (37%) and 40 m (6%). Most decodes (62%) fell within the six-hour window 00:00-06:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (63%); the estimated median was -7 dB.

Overview

515

Messages attributed

UTC dates decoded

Active 15-min windows

-7 dB

Estimated median S/N

Bands

80m · 286 40m · 30 20m · 190 10m · 9

First attributed message: 2026-06-12
Last attributed message: 2026-09-19 15:39 UTC

Observed FT8 message patterns

Attributed sample: 515 messages
Active dates: 15 UTC dates
Estimated median S/N: -7 dB
Estimated 10th-90th percentile: -16 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 55, moderate (-15 to -9 dB) 137, strong (≥ -8 dB) 323.

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 RD4WM in decoded directed-looking exchanges:

9J2FI · Zambia ×2 RC6OU · European Russia ×2 OD5VB · Lebanon 7Z1BQ · Saudi Arabia D2IM · Angola DA0LH · Fed. Rep. of Germany EW1AFZ · Belarus HK5R · Colombia K7VA · United States KB2ELA · United States KE5ETC · United States KE8USW · United States

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 RD4WM

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: LO66 · 42 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,180 km (approx.)
Last such locator decoded: 2026-09-19 15:17 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	RD4WM S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-19 15:32	80m	-20 / -	RA0FF	- / -11	9	Partial capture
09-19 15:29	80m	-18 / -	UA4QK	-20 / -	4	✓ Closing observed
09-19 15:29	80m	-19 / -	YE4FNN	- / -11	6	Partial capture
09-19 15:22	80m	-20 / -	RI1FJZ	- / -22	2	Partial capture
09-13 02:54	40m	- / -22	HK3MS	-13 / -	3	Partial capture
09-13 02:01	80m	-5 / -	LU1FP	- / -10	4	Partial capture
09-13 01:51	80m	-14 / -	LU1FP	- / -23	11	Partial capture
09-13 01:47	80m	-12 / -	LU1FP	- / -21	3	Partial capture
09-13 01:45	80m	-5 / 0	YO6LM	+12 / -1	4	✓ Full exchange observed
09-13 01:43	80m	-8 / -	SM3NXS	- / -19	2	✓ Closing fragment
09-13 01:42	80m	+2 / -	LU1FP	- / -19	2	Partial capture
09-13 01:41	80m	- / -	YO6LM	+9 / -	2	Partial capture
09-13 01:40	80m	- / -8	SN40KZE	-18 / -	2	Partial capture
09-13 01:37	80m	+2 / -	LA9JKA	- / -15	3	Partial capture
09-13 01:32	80m	-4 / -18	7X5CY	-6 / -16	5	✓ Full exchange observed
09-13 01:31	80m	+2 / -8	R7KKO	-17 / -4	5	✓ Full exchange observed
09-13 01:31	80m	- / 0	R4FDD	+2 / -	2	Partial capture
09-13 01:27	80m	-4 / -22	VP2MAA	-10 / -9	10	✓ Full exchange observed
09-12 16:37	80m	-5 / +2	RA3TKS	+2 / -	3	✓ Closing observed
09-12 16:35	80m	-2 / -7	R6ZE	+16 / +5	4	✓ Full exchange observed
08-28 03:55	20m	-16 / -	K7VA	- / -6	2	✓ Closing fragment
08-28 03:53	20m	-12 / -	W7O	- / -19	2	Partial capture
08-28 03:51	20m	-6 / -	EW1AFZ	- / -10	2	✓ Closing fragment
08-28 03:43	20m	-20 / -	KB2ELA	- / -4	2	✓ Closing fragment
08-28 03:24	20m	-8 / -	KB4KC	- / -9	4	Partial capture
08-28 03:21	20m	-7 / -	W6TOX	- / -11	5	✓ Closing fragment
08-28 03:20	20m	-5 / -	KE8USW	- / -13	3	✓ Closing fragment
08-28 03:18	20m	-1 / -	W6SCS	- / -15	3	✓ Closing fragment
08-28 03:16	20m	-6 / -	NT5AT	- / -8	3	✓ Closing fragment
08-28 03:14	20m	-6 / -	KQ4MHD	- / -21	4	✓ Closing fragment
08-28 03:12	20m	-11 / -	VE5SKN	- / -13	3	Partial capture
08-28 03:11	20m	-4 / -	WC9I	- / -1	2	✓ Closing fragment
08-27 17:23	20m	-3 / -	7Z1DM	- / -18	4	Partial capture
08-27 17:22	20m	-2 / -	OZ5THY	- / 0	2	✓ Closing fragment
08-27 17:20	20m	+4 / -	R7RCH	- / -15	2	✓ Closing fragment
08-27 17:14	20m	-3 / -	HZ1MW/P	- / -5	3	Partial capture
08-27 17:09	20m	+10 / -	D2IM	- / +3	2	✓ Closing fragment
08-27 16:31	20m	- / -	F1PPH	-4 / -	5	Partial capture
08-27 16:30	20m	- / -16	YF3AJY	-20 / -	2	✓ Closing fragment
08-27 04:47	20m	- / -14	RO6G	-7 / -	2	Partial capture
08-27 04:44	20m	- / -	EA5HEU	+10 / -	21	Partial capture
08-27 04:31	20m	-16 / -7	SV2AOB	-10 / +6	4	✓ Full exchange observed
08-27 04:29	20m	-8 / -	KJ6JUS	- / -14	2	Partial capture
08-27 04:25	20m	-14 / -	<...>	- / -15	2	Partial capture
08-27 04:18	20m	- / -	R6TA	+2 / -	3	Partial capture
08-27 04:17	20m	-13 / -1	RA6HN	+2 / -4	7	✓ Full exchange observed
08-27 04:15	20m	-14 / -	KE5ETC	- / -16	2	✓ Closing fragment
08-27 04:14	20m	-10 / -6	W9ML	-12 / -6	4	✓ Full exchange observed
08-27 04:11	20m	-20 / -12	YS1RS	-12 / -14	7	✓ Full exchange observed
08-27 03:58	20m	-18 / -	YS1RS	- / -16	5	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
153045 -15 1546  YE4FNN RD4WM -10 (x4)
153245 -17 1546  RA0FF RD4WM -11
153315 -21 1545  YE4FNN RD4WM -13
153345 -22 1546  BG3UPS RD4WM -11
153415 -18 1546  RA0FF RD4WM -07 (x8)

40m

UTC    dB Audio  Message
020215  -9  421  OA4ENG RD4WM -18 (x4)
020430 -15 1585  RD4WM <...> R-13 (x2)
020530  -7  422  <...> RD4WM -01
021130 -12 2228  HI3A RD4WM -13
021230 -17 2228  2M0AKI RD4WM -14
021245 -12  433  RD4WM HI3A R-18 (x3)
025415 -13 1098  RD4WM HK3MS R-22 (x3)

10m

UTC    dB Audio  Message
082330 -20 1466  RD4WM R6DZR KN84
073300  -7 2710  RD4WM F4IDN IN97
074245 -15 1042  RD4WM OD5VB RR73

20m

UTC    dB Audio  Message
035000 -16  874  CQ RD4WM LO66 (x2)
035100 -16  874  EW1AFZ RD4WM -10 (x2)
035200 -14  875  W6TOX RD4WM -09
035300 -12  874  W7O RD4WM -19 (x2)
035400  -9  874  CQ RD4WM LO66 (x2)
035500 -13  874  K7VA RD4WM -06 (x2)
035600 -17  874  CQ RD4WM LO66 (x2)
035745  +0 1933  RD4WM UA3SAO -16
040230 -20  874  XE2KBR RD4WM -14

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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