YL3NU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Latvia Most frequent locator attributed to this token: KO27

Receiver-side FT8 activity involving YL3NU, decoded by SO8OO in southeastern Poland. 1,498 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, 10m, across 50 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-09-07.

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 1,498 FT8 messages attributed to YL3NU as the transmitting token by decoded message structure across 50 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (33%), followed by 60 m (28%) and 40 m (24%). Most decodes (87%) fell within the six-hour window 18:00-00:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11.9 dB.

Overview

1,498

Messages attributed

UTC dates decoded

193

Active 15-min windows

-11.9 dB

Estimated median S/N

Bands

160m · 8 80m · 498 60m · 415 40m · 359 20m · 212 10m · 6

First attributed message: 2026-06-08
Last attributed message: 2026-09-07 21:20 UTC

Observed FT8 message patterns

Attributed sample: 1,498 messages
Active dates: 50 UTC dates
Estimated median S/N: -11.9 dB
Estimated 10th-90th percentile: -20 to -2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 426, moderate (-15 to -9 dB) 597, strong (≥ -8 dB) 475.

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 YL3NU in decoded directed-looking exchanges:

F5RRS · France ×3 GB2WWA · England ×3 TF8KW · Iceland ×3 US5HL · Ukraine ×2 SV5BYP · Dodecanese ×2 DL9KM · Fed. Rep. of Germany ×2 SQ9LOJ · Poland ×2 R50AVS · European Russia ×2 DB5HA · Fed. Rep. of Germany ×2 R2EA · European Russia ×2 OZ1KZX · Denmark ×2 R5AV · 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 YL3NU

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: KO27 · 1,021 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 867 km (approx.)
Last such locator decoded: 2026-09-07 21:20 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	YL3NU S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-07 21:17	80m	+1 / -11	R5AV	+7 / -	14	Partial capture
09-07 21:14	80m	- / -	EA1KCN	-11 / -	3	Partial capture
09-07 21:11	80m	-5 / -6	HA7TM	+19 / -	12	Partial capture
09-07 21:07	80m	-6 / -	DL7HS	- / -	3	Partial capture
09-07 20:55	60m	-13 / -	EA1MX	- / -26	9	Partial capture
09-07 20:50	60m	-15 / -	EA1MX	- / -	3	Partial capture
09-07 20:42	40m	-16 / -	UN8DAW	- / -21	3	✓ Closing fragment
09-07 20:37	40m	-16 / -	UR1CCT	- / -	2	Partial capture
09-07 20:33	40m	-12 / -	UR1CCT	- / -	2	Partial capture
09-07 19:58	40m	-20 / -3	PA2KV	+4 / -	8	Partial capture
09-07 19:56	40m	-20 / -	IS0AAS	- / -	4	Partial capture
09-06 21:24	40m	-19 / -	VP2MAA	- / -13	4	✓ Closing fragment
09-06 21:18	40m	-19 / -	CN8NS	- / -	6	Partial capture
09-06 21:01	40m	-20 / -11	EX7CQ	-3 / -2	4	✓ Full exchange observed
09-06 20:58	40m	-19 / -	CN8NS	- / -	4	Partial capture
09-06 20:55	40m	-14 / -13	EG26PDA	-16 / -6	3	Partial capture
09-06 20:54	40m	-16 / -	OZ2NYB/P	- / -	2	Partial capture
09-06 20:52	40m	-18 / -9	EG1PPE	-12 / -16	2	Partial capture
09-06 20:41	40m	-17 / -	YO2MKE	-20 / -5	6	Partial capture
09-06 20:37	40m	-18 / -15	R2EA	-4 / -	3	✓ Closing observed
09-06 20:33	40m	-13 / -15	EG7CQ	-16 / -12	5	✓ Full exchange observed
09-06 20:16	40m	-18 / -14	OV6ZM	+2 / -6	4	✓ Full exchange observed
09-06 20:01	40m	-20 / -	SP5DFK/QRP	- / -10	3	Partial capture
09-06 19:50	40m	-16 / -	UB3BDJ	- / -1	8	✓ Closing fragment
09-06 19:48	40m	-13 / -	OZ1JS	- / -	2	Partial capture
09-05 10:21	10m	- / -18	A92GE	-2 / -	3	✓ Closing fragment
09-04 23:07	80m	-13 / -	R2DQ	- / -	4	Partial capture
09-04 23:06	80m	-16 / -	HB9RJD	- / -	2	Partial capture
09-04 23:04	80m	-20 / -14	RN3AOE	-4 / -1	5	✓ Full exchange observed
09-04 23:01	80m	-16 / -10	OK1UOZ	+17 / -	3	✓ Closing observed
09-04 22:57	80m	-10 / +1	OH2MA	+6 / -	6	✓ Closing observed
09-04 22:47	60m	-18 / -	PC2F	- / -	4	Partial capture
09-04 22:44	60m	-12 / -	OZ1MAX	- / +3	3	✓ Closing fragment
09-04 22:44	60m	- / -	DL/VA3VPN	-22 / -	4	Partial capture
09-04 22:43	60m	-13 / -9	HA7UL	-14 / -3	5	✓ Full exchange observed
09-04 22:24	40m	-22 / -	RA4PIS	- / -	2	Partial capture
09-03 23:58	40m	- / -4	NG9J	+13 / -	5	Partial capture
09-03 23:38	40m	- / -14	F1PBZ	0 / -	2	Partial capture
09-01 23:22	40m	- / +3	MD0CCE	-2 / -	2	✓ Closing fragment
09-01 23:08	40m	-18 / -13	R3PJV	+2 / -	4	✓ Closing observed
09-01 23:01	40m	- / -14	IR7MGGC	-3 / -	3	Partial capture
09-01 22:58	40m	-20 / -18	EG5PDA	-12 / -	6	Partial capture
09-01 22:54	40m	-21 / -7	TF8KW	-14 / -11	3	✓ Full exchange observed
08-31 23:14	60m	-12 / -	IU6UAM	- / -	3	Partial capture
08-31 23:11	60m	-15 / -	ER1CW	- / -	7	Partial capture
08-30 22:31	80m	-16 / -6	OH1LEG	+18 / -3	8	✓ Full exchange observed
08-30 22:24	80m	-6 / -	F4GTB	- / -	6	Partial capture
08-30 22:04	80m	-7 / -4	IT9EJW	+5 / -8	5	✓ Full exchange observed
08-30 22:00	80m	0 / -13	9A1BTU	+16 / -5	7	✓ Full exchange observed
08-30 21:50	60m	-14 / +1	S52F	-6 / -2	6	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
211530 -12 2446  YL3NU EA1KCN IN53
211700  +3 2070  R5AV YL3NU KO27
211715  +1 2070  YL3NU R5AV -11
211730  +1 2070  R5AV YL3NU KO27
211745  +8 2070  YL3NU R5AV -11
211800  -3 2070  R5AV YL3NU KO27
211815  +7 2070  YL3NU R5AV -12
211830  +2 2070  R5AV YL3NU KO27
211845  +4 2071  YL3NU R5AV -13
211900  -1 2070  R5AV YL3NU KO27
211915 +10 2070  YL3NU R5AV -10
211930  +1 2070  R5AV YL3NU KO27
211945  +7 2071  YL3NU R5AV -10
212000  +5 2071  R5AV YL3NU KO27
212015  +9 2070  YL3NU R5AV -11

60m

UTC    dB Audio  Message
224815 -18 2015  PC2F YL3NU KO27 (x3)
205030 -14 1722  EA1MX YL3NU KO27 (x12)

40m

UTC    dB Audio  Message
195830 -24 1863  PA2KV YL3NU KO27
195845  +5  757  YL3NU PA2KV -03
195900 -20 1863  PA2KV YL3NU KO27 (x3)
200015  +3  757  YL3NU PA2KV -01
200100 -19 1863  PA2KV YL3NU KO27
203200 -14 1986  DJ2MS YL3NU KO27
203330 -12 1986  UR1CCT YL3NU KO27 (x4)
204245 -12 1987  UN8DAW YL3NU R-21 (x3)

10m

UTC    dB Audio  Message
174900  -3 2741  YL3NU F1PBZ +00 (x4)
085245 -13 2054  YL3NU UY5QJ +00 (x2)
185730 -17 1002  YL3NU F6BNX JN33
190230 -13 2197  YL3NU IZ7UIU JN80
190745  -2 2141  YL3NU DH6DAO JO41 (x3)
191800 -12  866  YL3NU G1OZO -08
102115  -2  648  YL3NU A92GE -18 (x3)

20m

UTC    dB Audio  Message
170230  -2 2186  YL3NU RY6O -03
170830  +2 1788  YL3NU IU2SLI -17 (x2)
171845  -9 2384  YL3NU R9BT -17 (x2)
175515 -14 2482  UN0PA YL3NU KO27
183330  -8 2117  CQ YL3NU KO27 (x4)
183515 +16 2117  YL3NU F6EKI JN23
183600 -13 2117  <IR7MGGC> YL3NU KO27 (x2)
210115 -11 2620  YL3NU 4L7T -06 (x2)

160m

UTC    dB Audio  Message
230600 -14 1691  CQ YL3NU KO27 (x3)
205415  -9 1850  YL3NU RU1AB -09 (x9)
211030 -24 1876  CQ YL3NU KO27                         a1

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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