YO3RU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Romania Most frequent locator attributed to this token: KN34

Receiver-side FT8 activity involving YO3RU, decoded by SO8OO in southeastern Poland. 436 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-07-25 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 436 FT8 messages attributed to YO3RU as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (47%), followed by 40 m (35%) and 80 m (17%). The busiest six-hour window was 02:00-08:00 UTC, containing 49% of decodes. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (77%); the estimated median was +1 dB.

Overview

436

Messages attributed

UTC dates decoded

Active 15-min windows

+1 dB

Estimated median S/N

Bands

80m · 76 40m · 154 20m · 206

First attributed message: 2026-07-25
Last attributed message: 2026-08-30 09:10 UTC

Observed FT8 message patterns

Attributed sample: 436 messages
Active dates: 4 UTC dates
Estimated median S/N: +1 dB
Estimated 10th-90th percentile: -14 to +8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 27, moderate (-15 to -9 dB) 72, strong (≥ -8 dB) 337.

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 YO3RU in decoded directed-looking exchanges:

DL9KM · Fed. Rep. of Germany ×3 F4FSY · France ×2 PD9FLX · Netherlands ×2 IU1DXU · Italy ×2 OK1ZJK · Czech Republic ×2 RA3ZDU · European Russia ×2 LY2EW · Lithuania ×2 LZ6C · Bulgaria ×2 F1IGI · France IU1QZR · Italy 2W0YOX · Wales 3A2MW · Monaco

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 YO3RU

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: KN34 · 203 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 721 km (approx.)
Last such locator decoded: 2026-08-30 09:10 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	YO3RU S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-12 04:45	40m	- / -	RN3ZBX	-1 / -	2	Partial capture
09-11 18:00	40m	- / -	R5RA	-8 / -	3	Partial capture
09-11 17:57	40m	- / -1	E70SZ	-1 / -	3	✓ Closing fragment
09-11 17:48	40m	- / -6	RC2Y	-7 / -	3	Partial capture
09-11 17:42	40m	- / -	DL9YNG	-12 / -	2	Partial capture
09-11 17:40	40m	- / -	UA9SAV	-2 / -	2	Partial capture
09-11 17:35	40m	- / -11	RU3QR	+3 / -	2	✓ Closing fragment
08-30 09:11	20m	- / -	ON4JPE	+6 / -	2	Partial capture
08-30 09:06	20m	-9 / +2	DF3NK	0 / -	6	✓ Full exchange observed
08-30 08:47	20m	-3 / +2	R3KJF	+3 / -	5	✓ Full exchange observed
08-30 08:47	20m	-2 / -	PD9FLX	- / 0	2	✓ Closing fragment
08-30 08:45	20m	-3 / -1	F4HTA	-2 / -4	4	✓ Full exchange observed
08-30 08:43	20m	-6 / -	PD9FLX	- / +5	2	Partial capture
08-30 08:42	20m	-6 / -	LY2BSW	- / -	2	✓ Closing fragment
08-30 08:41	20m	-8 / -	SP3ZAC	- / -	2	Partial capture
08-30 08:39	20m	-13 / +8	IU1DXU	-2 / -8	5	✓ Full exchange observed
08-30 08:31	20m	-6 / -	UA3LRN	-11 / +5	3	✓ Closing observed
08-30 08:29	20m	-4 / -	YL3QZ	- / +1	2	✓ Closing fragment
08-30 08:28	20m	-2 / -	YU1NTP	-4 / +9	3	✓ Closing observed
08-30 08:27	20m	-3 / -	DK1FF	- / +3	2	✓ Closing fragment
08-30 08:26	20m	0 / 0	RA3ZDU	-3 / +9	4	✓ Full exchange observed
08-30 08:24	20m	-5 / -3	F6HUK	+3 / -5	5	✓ Full exchange observed
08-30 08:21	20m	+1 / -	RX3DCZ	- / +8	2	✓ Closing fragment
08-30 08:20	20m	+4 / -	DK5DW	- / -	2	✓ Closing fragment
08-30 08:14	20m	- / 0	DJ1TU	-3 / -	3	✓ Closing fragment
08-30 08:13	20m	-10 / -	HK3W	- / -	2	Partial capture
08-30 08:07	20m	- / +7	2W0YOX	-1 / -	5	✓ Closing fragment
08-30 08:02	20m	- / -13	UI6O	-2 / -	2	Partial capture
08-30 08:01	20m	-19 / -2	DL1YS	-15 / -	3	✓ Closing observed
08-30 07:56	20m	- / -8	F1PSX	+1 / -	3	✓ Closing fragment
08-30 07:54	20m	- / -11	F4FSY	+2 / -	2	✓ Closing fragment
08-30 07:52	20m	-17 / -24	R7OV	-11 / -3	9	Partial capture
08-30 07:43	20m	-7 / +4	MI7RDK	-4 / -	3	✓ Closing observed
08-30 07:40	20m	+3 / +4	ON4CVL	+9 / -8	5	✓ Full exchange observed
08-30 07:35	20m	-2 / 0	3A2MW	-17 / -	6	✓ Closing observed
08-30 07:35	20m	-5 / -25	EB3CGQ	-8 / -	5	✓ Closing observed
08-30 07:32	20m	- / +5	ON3BEN	-12 / -	2	✓ Closing fragment
08-30 07:26	20m	- / -	US2YW	+1 / -	3	Partial capture
08-30 07:24	20m	- / -	M7ISX	-2 / -	3	Partial capture
08-30 07:23	20m	+4 / -1	F4NKF	+1 / +1	3	✓ Full exchange observed
08-30 07:21	20m	+8 / +1	F4HSB	-9 / -2	4	✓ Full exchange observed
08-30 07:18	20m	-6 / +5	F4PCM	+18 / -	5	✓ Full exchange observed
08-30 07:12	20m	- / -11	F6DZU	+9 / -	4	Partial capture
08-30 07:08	20m	-8 / -4	M6WRB	-14 / -9	10	✓ Full exchange observed
08-30 07:07	20m	- / -9	UB4CJS	-8 / -	2	Partial capture
08-30 07:06	20m	- / -11	UA3NFG	-5 / -	4	✓ Closing fragment
08-30 07:04	20m	-9 / +3	R8HC	-14 / -	3	✓ Closing observed
08-30 07:01	20m	+10 / -	TF5B	- / -	2	Partial capture
08-30 07:00	20m	+9 / -	SP6AMK	- / +10	2	✓ Closing fragment
08-30 06:57	20m	- / -12	<...>	-11 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
174030  -2 2519  YO3RU UA9SAV LO81
174200 -15 1410  YO3RU DL9YNG JN48 (x2)
174430  -9 1411  YO3RU IK1MJK/P JN35
174800  -8 1902  YO3RU RC2Y KO73 (x3)
175700  -2 1163  YO3RU E70SZ JN84 (x3)
180030 -10 2123  YO3RU R5RA LO02 (x3)
044500  -3 2452  YO3RU RN3ZBX KO90 (x2)

20m

UTC    dB Audio  Message
090630 -10 2455  LY1MG YO3RU RR73
090645  +2 1847  YO3RU DF3NK JO60
090700  -8 2455  DF3NK YO3RU +12
090715  -2 1847  YO3RU DF3NK R+02
090730 -10 2455  DF3NK YO3RU +12
090745  -1 1846  YO3RU DF3NK R+02
090800 -17 2106  <YO3RU> II7MGBT RR73
090800  -7 2455  F5OYA/P YO3RU KN34
090830  -8 2423  DF3NK YO3RU RR73
090930 -10 2423  CQ YO3RU KN34
091000  -6 2425  OY1HJ YO3RU KN34
091030  -7 2424  DL2VLL YO3RU +05
091145  +4 1550  YO3RU ON4JPE JO10
091145 -12 2424  YO3RU DL4DD JO43
091215  +7 1550  YO3RU ON4JPE JO10

80m

UTC    dB Audio  Message
024830  +1 2146  AA3B YO3RU KN34
025045  +0 2205  YO3RU IQ4JO JN63 (x3)
025530  +4 2145  OZ1HGH YO3RU -07
025615  -6 1502  YO3RU OZ1HGH R-13
030645  -3 2146  VP2MAA YO3RU KN34 (x2)
030745  +0 2146  HI8R YO3RU KN34 (x4)
030945  -1 2066  RL6ZZ YO3RU KN34 (x2)
031200 -13 2066  YO3RU RL6ZZ RR73

10m

UTC    dB Audio  Message
134400 -15 1858  YO3RU IU1QZR JN45 (x5)
135730  -2 2646  YO3RU F1PBZ +01 (x3)
141130 -10 1765  YO3RU F4FSY +02 (x2)
142600 -21 1374  YO3RU F1IGI R-11 (x2)
144600  -7 2571  YO3RU PD9FLX 73
144900  -6 2407  YO3RU DN9OPA JN38 (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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