RM4W — 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: LO66

Receiver-side FT8 activity involving RM4W, decoded by SO8OO in southeastern Poland. 298 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 31 UTC dates in the available aggregate history. Observed between 2026-06-19 and 2026-10-17.

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 298 FT8 messages attributed to RM4W as the transmitting token by decoded message structure across 31 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (39%), followed by 20 m (30%) and 80 m (16%). Several six-hour UTC windows tied for the largest share (78%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

298

Messages attributed

UTC dates decoded

Active 15-min windows

-11 dB

Estimated median S/N

Bands

160m · 115 80m · 49 40m · 14 20m · 88 10m · 32

First attributed message: 2026-06-19
Last attributed message: 2026-10-17 18:23 UTC

Observed FT8 message patterns

Attributed sample: 298 messages
Active dates: 31 UTC dates
Estimated median S/N: -11 dB
Estimated 10th-90th percentile: -19 to -3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 78, moderate (-15 to -9 dB) 125, strong (≥ -8 dB) 95.

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 RM4W in decoded directed-looking exchanges:

R6OIZ · European Russia ×3 RA6ATZ · European Russia ×2 RA3XDX · European Russia ×2 UA3IDQ · European Russia ×2 R3EDI · European Russia EA1KE · Spain R2EA/P · European Russia R4CCE · European Russia R4DD · European Russia R6BH · European Russia R6OBN · European Russia R6ZEJ · 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 RM4W

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 · 154 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,180 km (approx.)
Last such locator decoded: 2026-10-17 18:23 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	RM4W S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-17 18:23	160m	-17 / -	9K2OD	- / -	2	Partial capture
10-17 18:21	160m	-8 / -	UA4QK	- / +4	2	✓ Closing fragment
10-17 18:18	160m	-6 / -	RK6OQ	- / -17	3	✓ Closing fragment
10-17 17:46	160m	-13 / -	R6ZEJ	- / -	2	✓ Closing fragment
10-17 17:42	160m	-12 / -	RU3OW	-9 / -12	5	✓ Full exchange observed
10-17 17:28	160m	-16 / -	R9CS/P	- / -	3	Partial capture
10-09 18:16	160m	-16 / -	RD9FC	- / -7	2	✓ Closing fragment
10-09 17:03	80m	-1 / -	RK6OQ	- / -	4	Partial capture
10-09 16:07	160m	-24 / -	R4CCE	- / -8	2	✓ Closing fragment
10-09 16:04	160m	-14 / -12	RU4CK	-16 / -1	5	✓ Full exchange observed
09-25 18:55	160m	-24 / -10	EA1KE	-11 / -19	4	✓ Full exchange observed
09-25 18:52	160m	-16 / -	RA9FDR	- / -11	2	✓ Closing fragment
09-25 18:50	160m	-19 / -	UA0SCF	- / -14	2	✓ Closing fragment
09-25 18:50	160m	-18 / -13	R2EA/P	-6 / -9	3	✓ Full exchange observed
09-25 18:16	160m	-12 / -17	SP1MGM	+12 / -15	6	✓ Full exchange observed
09-25 18:14	160m	-9 / -	R7KCK	-11 / -8	5	✓ Closing observed
09-25 16:27	160m	- / +2	RA3OR	-21 / -	2	✓ Closing fragment
09-23 18:45	40m	-14 / -	S21SDR	- / -	2	Partial capture
09-23 18:07	160m	-13 / -	R3ICU	- / -22	3	Partial capture
09-23 17:59	160m	- / +4	RI1FJZ	-17 / -	2	✓ Closing fragment
09-19 19:01	80m	- / -4	R3RRC/P	+1 / -	2	✓ Closing fragment
09-19 18:22	160m	- / -12	UA2FBW	0 / -	3	✓ Closing fragment
09-19 17:40	160m	-6 / -	RA3XDX	-1 / -3	3	✓ Closing observed
09-19 17:35	160m	-10 / -11	UA3IDQ	-13 / -7	4	✓ Full exchange observed
09-18 16:57	160m	- / -	1850PSE	-2 / -	2	Partial capture
09-18 16:51	160m	- / -3	UA7N	0 / -	2	✓ Closing fragment
09-18 16:43	160m	-22 / -	UB8CQC/P	- / -9	2	✓ Closing fragment
09-17 18:06	160m	-14 / -	R6OBN	-21 / -10	2	✓ Closing observed
09-17 17:34	160m	-8 / -	R7ZY	- / -	3	Partial capture
09-17 17:30	160m	-14 / -	R6BH	- / -9	2	✓ Closing fragment
09-17 17:24	160m	-14 / -	RA3RGQ	- / -3	4	✓ Closing fragment
09-17 17:21	160m	-14 / -14	R3YCJ	-10 / -	2	Partial capture
09-05 17:27	160m	-18 / -	RA4ABH	- / -21	2	Partial capture
09-05 17:16	160m	-17 / -	R9CS/P	- / -	3	✓ Closing fragment
09-04 18:46	80m	-10 / -	RI1FJL	- / -	2	Partial capture
09-04 18:16	160m	-22 / -	R4DD	-15 / -2	2	✓ Closing observed
09-04 18:04	80m	- / -13	R9WGG	0 / -	2	Partial capture
09-04 18:02	80m	- / -4	RA9SOZ	-10 / -	2	✓ Closing fragment
09-04 17:58	160m	-18 / -	RA3X	- / -	2	Partial capture
09-04 17:51	160m	-21 / -	R8DX	- / -1	2	✓ Closing fragment
09-04 17:47	160m	-19 / -16	RA3XDX	-12 / -16	5	✓ Full exchange observed
09-04 17:45	160m	-18 / -12	RA6ATZ	-10 / -6	5	✓ Full exchange observed
09-04 17:43	160m	-16 / +5	RY3K	+11 / +2	5	✓ Full exchange observed
08-29 08:28	20m	-10 / -10	GJ0KYZ	-21 / -11	4	✓ Full exchange observed
08-29 08:26	20m	-16 / -17	ES2AJ	+3 / -	2	✓ Closing observed
08-29 08:23	20m	-9 / -14	RO6OP	-2 / -	3	Partial capture
08-29 08:19	20m	-8 / +7	RM6OS	+3 / -2	3	Partial capture
08-29 05:46	20m	-2 / -	ZY7F	- / -	2	Partial capture
08-29 05:32	20m	- / -16	RN7O	-8 / -	2	✓ Closing fragment
08-28 19:08	160m	-8 / -	RA3VMK/P	- / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
174215 -10  877  RM4W RU3OW KO91
174230 -10  931  RU3OW RM4W -12
174245 -11  878  RM4W RU3OW R+17
174300 -14  931  RU3OW RM4W RR73
174315  -6  878  RM4W RU3OW 73
174630 -14  931  R6ZEJ RM4W LO66 (x2)
181030 -11  683  9K2OD RM4W LO66
181845  -6  732  RK6OQ RM4W LO66 (x3)
182115  -7  757  UA4QK RM4W +04 (x2)
182300 -17  757  9K2OD RM4W LO66 (x2)

80m

UTC    dB Audio  Message
180215  -9 1197  RM4W RA9SOZ -04 (x2)
180445  +0 1545  RM4W R9WGG -13 (x2)
184400 -13 1006  RI1FJL RM4W LO66 (x3)
190100  -1 2365  RM4W R3RRC/P -04 (x2)
170015  -8  806  RK6OQ RM4W LO66 (x5)
162845 -13 2353  RX9KJ RM4W LO66

10m

UTC    dB Audio  Message
182030 -11 2032  RM4W R3EDI +22 (x2)
102400 -14  610  RM4W R7RAG -06
103815 -20 1833  RM4W RA6ATZ +03 (x2)
064600 -12  766  RM4W R8DV -13

40m

UTC    dB Audio  Message
182015 -11  679  RM4N RM4W R+05
182030 -18 2028  RM4W RM4N RR73
182115 -10  679  YO4LUP RM4W -05
172945 -16 2125  R4KR RM4W LO66 (x3)
173100 -11  730  RM4W R4KR RR73
173115 -13 2126  R4KR RM4W 73
184545 -12 2044  S21SDR RM4W LO66 (x2)
184945 -14 2044  S79KW RM4W 73

20m

UTC    dB Audio  Message
081815  -5 2465  R0WBN/P RM4W 73
081915  -7 2472  RM6OS RM4W LO66
082100  +3 2144  RM4W RM6OS +07
082115  -9 2343  RM6OS RM4W R-02
082130  -4 2144  RM4W RR73; UA9FAR <...> +00
082345  -9 2343  RO6OP RM4W LO66 (x2)
082430  -2 1071  RM4W RO6OP -14
082630 -13 2343  RU6FK RM4W LO66
082645  +3 2482  RM4W ES2AJ -17
082830 -16 2352  ES2AJ RM4W 73
082845 -20 2352  RM4W GJ0KYZ -10
082900  -8 2352  GJ0KYZ RM4W R-11
082915 -22 2352  RM4W GJ0KYZ RR73
082930 -11 2352  GJ0KYZ RM4W 73

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

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