RU3FM — 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: KO94

Receiver-side FT8 activity involving RU3FM, decoded by SO8OO in southeastern Poland. 4,969 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 78 UTC dates in the available aggregate history. Observed between 2026-06-11 and 2026-11-05.

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 4,969 FT8 messages attributed to RU3FM as the transmitting token by decoded message structure across 78 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (57%), followed by 80 m (22%) and 20 m (10%). Most decodes (75%) fell within the six-hour window 15:00-21:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (66%); the estimated median was -5 dB.

Overview

4,969

Messages attributed

UTC dates decoded

438

Active 15-min windows

-5 dB

Estimated median S/N

Bands

160m · 2,830 80m · 1,117 40m · 346 20m · 478 10m · 198

First attributed message: 2026-06-11
Last attributed message: 2026-11-05 19:29 UTC

Observed FT8 message patterns

Attributed sample: 4,969 messages
Active dates: 78 UTC dates
Estimated median S/N: -5 dB
Estimated 10th-90th percentile: -14.5 to +4.5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 368, moderate (-15 to -9 dB) 1,310, strong (≥ -8 dB) 3,291.

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 RU3FM in decoded directed-looking exchanges:

R9CS/P · Asiatic Russia ×7 R7ZY · European Russia ×3 DK6WS · Fed. Rep. of Germany ×2 IN3EYI · Italy ×2 OH7KB · Finland ×2 R3KLE · European Russia ×2 R4IK · European Russia ×2 R4SCB · European Russia ×2 RA3VMD · European Russia ×2 RM5F · European Russia ×2 RT2P · European Russia ×2 UA3IDQ · European Russia ×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 RU3FM

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: KO94 · 3,316 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,273 km (approx.)
Last such locator decoded: 2026-11-05 19:28 UTC

Other locator fields attributed to this token: KO85 (382).

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	RU3FM S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-05 19:27	160m	-6 / -	R9TT	- / -18	6	✓ Closing fragment
11-04 18:30	80m	-9 / -18	R6OER	-20 / -2	7	✓ Full exchange observed
11-04 18:14	80m	-10 / +2	R4FES	-11 / -5	4	✓ Full exchange observed
11-04 13:51	80m	-20 / -	KH8A	- / -	2	Partial capture
11-04 00:51	80m	-7 / -	UA9XL/P	- / -3	3	✓ Closing fragment
11-02 22:13	160m	-8 / -20	6W/IK2HKT	-8 / -11	4	Partial capture
11-02 22:10	160m	-4 / -	YO1BRANCUSI	- / -	5	Partial capture
11-02 22:04	160m	-6 / -	6W/IK2HKT	- / -	8	Partial capture
11-01 19:15	160m	+1 / -4	RX3I	0 / +2	12	✓ Full exchange observed
11-01 19:07	160m	-1 / 0	RU4CK/P	-23 / 0	15	✓ Full exchange observed
11-01 17:36	160m	-5 / -	RC4YA	- / -12	5	✓ Closing fragment
11-01 02:19	160m	-1 / -	6W/IK2HKT	- / -	22	Partial capture
11-01 02:06	160m	-3 / -	6W/IK2HKT	- / -	9	Partial capture
11-01 01:57	160m	-3 / -	6W/IK2HKT	- / -	10	Partial capture
11-01 01:31	160m	-1 / -	6W/IK2HKT	- / -	28	Partial capture
11-01 01:26	160m	-2 / -	<...>	- / -	8	Partial capture
11-01 01:21	160m	-2 / -	IK3/UY7LA	- / -	6	Partial capture
11-01 01:00	160m	+3 / -	6W/IK2HKT	- / -17	33	Partial capture
11-01 00:54	160m	+1 / -	6W/IK2HKT	- / -19	7	Partial capture
10-31 17:02	160m	+2 / -4	RQ7R	-24 / -19	5	✓ Full exchange observed
10-31 16:43	160m	+4 / -	RV0AR	- / -15	9	✓ Closing fragment
10-31 16:25	160m	-2 / -	RV0AR	- / -	6	Partial capture
10-31 16:01	160m	+9 / -	RW0UM	- / -	6	Partial capture
10-31 16:00	160m	+4 / -	6W/IK2HKT	- / -	2	Partial capture
10-31 15:59	160m	-4 / -	IK3/UY7LA	- / -	3	Partial capture
10-31 00:40	160m	-6 / -	IK3/UY7LA	- / -	5	Partial capture
10-31 00:31	160m	-7 / -	IK3/UY7LA	- / -	3	Partial capture
10-31 00:20	160m	-5 / -	IK3/UY7LA	- / -	17	Partial capture
10-31 00:11	160m	-5 / -	IK3/UY7LA	- / -	9	Partial capture
10-30 23:59	160m	-6 / -	IK3/UY7LA	- / -24	15	Partial capture
10-30 23:52	160m	-5 / -	IK3/UY7LA	- / -	9	Partial capture
10-30 23:39	160m	-8 / -	6W/IK2HKT	- / -	20	Partial capture
10-30 19:02	160m	-1 / -	6W/IK2HKT	- / -24	5	Partial capture
10-30 17:52	160m	-8 / -	6W/IK2HKT	- / -3	17	Partial capture
10-30 17:50	160m	-5 / -	IK3/UY7LA	- / -	3	Partial capture
10-30 15:14	80m	-15 / -1	RC1BQ	-6 / -10	6	✓ Full exchange observed
10-29 18:29	160m	-3 / -	F5UKW	- / -	2	Partial capture
10-29 18:27	160m	0 / -	F4FTV	- / -	2	Partial capture
10-29 18:24	160m	-14 / -	US8UX	- / -	2	Partial capture
10-29 18:19	160m	-10 / -	EA3AJI	- / -	2	Partial capture
10-29 18:16	160m	-12 / -	RC2DT	- / -17	3	✓ Closing fragment
10-29 18:13	160m	-13 / +9	OH5BM	-18 / -7	6	✓ Full exchange observed
10-29 18:11	160m	-10 / -5	IK0YUT	+5 / -10	5	✓ Full exchange observed
10-29 18:03	160m	-8 / -	SM0CXS	0 / -2	5	✓ Full exchange observed
10-29 18:01	160m	-10 / -	RA1OW	- / -	2	✓ Closing fragment
10-29 17:59	160m	-9 / -7	OZ5AGJ	-15 / -22	3	✓ Full exchange observed
10-29 17:53	160m	-13 / -	TK/DH7SB	- / -	3	Partial capture
10-29 17:49	160m	-12 / -3	SQ8GBG	-10 / -12	5	✓ Full exchange observed
10-29 17:46	160m	-5 / -	TK/DH7SB	- / -	2	Partial capture
10-29 17:41	160m	-9 / -	SP3KRE	- / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
221215  -6 1352  YO1BRANCUSI RU3FM KO94 (x2)
221315  -9 1352  <6W/IK2HKT> RU3FM KO94 (x2)
221400  -8  608  RU3FM 6W/IK2HKT -20
221415  -6 1352  6W/IK2HKT RU3FM R-11
221430 -12  608  RU3FM RR73; SP4TST <...> -22
192700  -6 1345  R9TT RU3FM KO94 (x6)
193015  -6 1702  RU3FM R3DAJ KO85
193045 -15 1998  RU3FM RW6MZ KN97

80m

UTC    dB Audio  Message
005145  -4 2450  UA9XL/P RU3FM R-03 (x2)
135115 -20 2252  KH8A RU3FM KO94 (x2)
181400 -10 2296  R4FES RU3FM KO94
181415 -13 1192  RU3FM R4FES +02
181430 -10 2296  R4FES RU3FM R-05
181445  -9 1192  RU3FM R4FES RR73
183015  -2 2126  R6OER RU3FM KO94 (x3)
183300 -16 1190  RU3FM R6OER -18
183315  +0 2126  R6OER RU3FM R-02
183330 -24 1189  RU3FM R6OER RR73
183345 -17 2126  R6OER RU3FM 73

40m

UTC    dB Audio  Message
162215  -9 2569  RD9T RU3FM KO94
162230 -12 1294  RU3FM RD9T -01 (x2)
162315  -4 2569  RD9T RU3FM 73
162415  -2 2569  CQ RU3FM KO94
162515 -10 2569  SP3OCJ RU3FM R-18
162530  +4 1997  RU3FM SP3OCJ RR73
162545 -11 2569  SP3OCJ RU3FM 73
044415  -5  876  HF50HSP RU3FM KO94 (x3)
044530  +4  540  RU3FM RR73; YO7CKQ <...> -06
044600 -16  875  RU3FM GJ0KYZ -02 (x3)

10m

UTC    dB Audio  Message
085830 -24 1957  RK3AW/P RU3FM KO94
094545  -5  476  RU3FM CR7CDR -12 (x2)
095015 -18 2095  RU3FM EA7KGJ RR73
125745 -16 2327  RU3FM EA7Z IM67
103030 -17 2081  RU3FM 5Z4RS -09 (x2)
112700  +3 1148  RU3FM CT7BRV -11 (x2)
121730  +8  639  RU3FM EA7Z IM67 (x4)
142145  -5 2560  RU3FM CT5JLR -05 (x2)

20m

UTC    dB Audio  Message
042930 -18  758  CQ RU3FM KO85                         a1
043330 -13  759  YV4PPC RU3FM R-13 (x2)
043500 -13  759  KD7PCE RU3FM R-05
043515  -4  758  RU3FM KD7PCE RR73
043700 -11  759  K0SSD RU3FM KO85 (x2)
044030 -13  759  CQ RU3FM KO85                         a1
044800 -15  759  G1SID RU3FM R-17
045945 -18  759  RU3FM KF5VDX EL17 (x2)
050045  -4 2607  RU3FM OK2CNI R-04
050315  -7 1952  RU3FM K7KX RR73
050445 -20 1740  RU3FM YV5AEZ -14
062915  -7 1679  OA1F RU3FM KO94

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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