YL3NJ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Latvia Most frequent locator attributed to this token: KO36

Receiver-side FT8 activity involving YL3NJ, decoded by SO8OO in southeastern Poland. 41 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 10m, across 5 UTC dates in the available aggregate history. Observed between 2026-07-19 and 2026-09-02.

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 41 FT8 messages attributed to YL3NJ as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (71%), followed by 60 m (15%) and 160 m (7%). Several six-hour UTC windows tied for the largest share (95%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (71%); the estimated median was +4 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

+4 dB

Estimated median S/N

Bands

160m · 3 80m · 29 60m · 6 40m · 2 10m · 1

First attributed message: 2026-07-19
Last attributed message: 2026-09-02 21:05 UTC

Observed FT8 message patterns

Attributed sample: 41 messages
Active dates: 5 UTC dates
Estimated median S/N: +4 dB
Estimated 10th-90th percentile: -12 to +13 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 11, strong (≥ -8 dB) 29.

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 YL3NJ in decoded directed-looking exchanges:

DM3OA · Fed. Rep. of Germany RN1ON · European Russia UA3ZUX · European Russia UB3YCK · European Russia F4BYA · France YO4NF · Romania DL3IAK · Fed. Rep. of Germany UR1CCT · Ukraine DD6ZV · Fed. Rep. of Germany HA7TM · Hungary OH6FSO · Finland ON7GB · Belgium

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 YL3NJ

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: KO36 · 12 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 807 km (approx.)
Last such locator decoded: 2026-09-02 21:01 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	YL3NJ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-02 21:04	60m	-12 / -10	G0AZH	-18 / -	3	Partial capture
09-02 21:01	60m	- / -12	HA7TM	+20 / -	5	✓ Closing fragment
09-02 21:00	60m	- / -7	OH6FSO	-2 / -	2	✓ Closing fragment
09-02 20:55	60m	-12 / -6	DD6ZV	+8 / +10	7	✓ Full exchange observed
09-02 20:55	60m	- / -	F5RAV	-10 / -	4	Partial capture
09-02 20:55	60m	-11 / -6	ON7GB	+1 / -	10	✓ Closing observed
09-02 20:55	60m	- / -	ON7KEI	-14 / -	4	Partial capture
09-02 20:45	160m	-14 / -	UB3YCK	- / -7	2	✓ Closing fragment
09-02 20:41	160m	-11 / -13	DM3OA	-12 / +1	3	✓ Full exchange observed
09-02 20:39	160m	- / -12	RN1ON	-14 / -	3	✓ Closing fragment
09-02 20:06	160m	- / -15	OH6B	-8 / -	2	Partial capture
09-02 19:52	160m	- / -20	UA3ZUX	+7 / -	3	✓ Closing fragment
08-29 04:21	40m	- / -2	DL3IAK	-12 / -	2	✓ Closing fragment
08-28 05:11	20m	- / -13	F4BYA	-11 / -	2	✓ Closing fragment
08-24 18:57	80m	+8 / -14	YT6AAA	+9 / -	5	✓ Closing observed
08-24 18:55	80m	+4 / -4	R4HHN	-7 / +8	5	✓ Full exchange observed
08-24 18:54	80m	- / -	DA6MS	0 / -	6	Partial capture
08-24 18:54	80m	+2 / -22	DO2YJG	-18 / -20	7	Partial capture
08-24 18:54	80m	+7 / -19	OZ6YN	-6 / -	9	✓ Closing observed
08-24 18:54	80m	- / -	UA3UBV	-8 / -	2	Partial capture
08-24 18:53	80m	- / -	DL7MD	-8 / -	2	Partial capture
08-24 18:52	80m	-4 / +9	RA2FU	-7 / +3	5	✓ Full exchange observed
08-24 18:50	80m	- / -	UA3UBV	-16 / -	2	Partial capture
08-24 18:49	80m	- / -	HF5A	+5 / -	3	✓ Closing fragment
08-20 04:20	40m	-9 / -3	UR1CCT	+13 / -	5	✓ Full exchange observed
08-16 20:49	10m	- / -	DN9OPA	-16 / -	5	Partial capture
08-16 20:49	10m	- / -	DL3NGN	-16 / -	2	Partial capture
07-25 20:37	80m	+16 / -1	SP9UPH	+21 / +3	5	✓ Full exchange observed
07-25 20:36	80m	- / -11	SV4OZF	-17 / -	3	✓ Closing fragment
07-25 20:35	80m	- / -	DK5WL	-14 / -	3	Partial capture
07-25 20:35	80m	+10 / -	LY1DX	0 / +8	5	✓ Full exchange observed
07-25 20:34	80m	+11 / -4	DK4RH	-7 / -7	4	✓ Full exchange observed
07-25 20:32	80m	+9 / +2	9A4ZM	+15 / -8	4	✓ Full exchange observed
07-25 20:31	80m	+14 / -	E70SZ	- / -2	2	✓ Closing fragment
07-25 20:31	80m	+12 / -	UX7QV	+15 / +5	4	Partial capture
07-25 20:30	80m	+11 / -11	DA6CH	-10 / -	2	Partial capture
07-25 20:29	80m	+7 / -	RG2T	- / -	2	Partial capture
07-19 17:53	20m	- / -7	OE3EHS	+12 / -	2	Partial capture
07-12 04:42	20m	- / -12	RU7C	-20 / -	2	Partial capture
07-04 05:14	20m	- / -8	9A5E	0 / -	5	Partial capture
07-04 05:11	20m	- / -13	YO4NF	-1 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
205815  +2 1331  YL3NJ ON7GB R-06 (x2)
205900 -11  559  ON7GB YL3NJ RRR
205915  +0 1331  YL3NJ ON7GB 73
210015  -1 2805  YL3NJ OH6FSO -07 (x2)
210130  -9  559  CQ YL3NJ KO36
210145 +19  559  YL3NJ HA7TM JN97 (x5)
210415 -21 1826  YL3NJ G0AZH R-10 (x2)
210500 -12  559  G0AZH YL3NJ RRR

160m

UTC    dB Audio  Message
195245  +7 2545  YL3NJ UA3ZUX KO90 (x3)
195715  +9 2554  YL3NJ OH6RE KP22
200615  -8  551  YL3NJ OH6B KP33 (x2)
203915  -9 1094  YL3NJ RN1ON LP04 (x3)
204145 -10 1931  YL3NJ DM3OA -13
204200 -11  551  DM3OA YL3NJ R+01
204215 -15 1931  YL3NJ DM3OA RR73
204545 -14  551  UB3YCK YL3NJ R-07 (x2)

40m

UTC    dB Audio  Message
042030  -9 1116  CQ YL3NJ KO36
042045  +9  768  YL3NJ UR1CCT KN69
042100  -9 1117  UR1CCT YL3NJ +18
042115 +15  768  YL3NJ UR1CCT R-03 (x3)
042145 -13  399  YL3NJ DL3IAK R-02 (x2)

20m

UTC    dB Audio  Message
051115  -3 1203  YL3NJ YO4NF -13 (x2)
051415  -1 2207  YL3NJ 9A5E -08 (x5)
044245 -20 1638  YL3NJ RU7C KN95 (x2)
175315 +12 2535  YL3NJ OE3EHS JN87 (x2)
051115 -14 2715  YL3NJ F4BYA R-13 (x2)

80m

UTC    dB Audio  Message
185615  -5  735  YL3NJ R4HHN R-04
185615  -7 1610  YL3NJ OZ6YN JO65
185615  +3  384  YL3NJ DA6MS JO41
185630  +7  587  R4HHN YL3NJ RRR
185645  -9  734  YL3NJ R4HHN 73
185645  -6 1610  YL3NJ OZ6YN JO65
185645  -2  384  YL3NJ DA6MS JO41
185715  +9  904  YL3NJ YT6AAA KN04
185715  -3 1610  YL3NJ OZ6YN R-19
185730  +7  587  OZ6YN YL3NJ RRR
185745  +7  904  YL3NJ YT6AAA KN04
185745  -5 1094  YL3NJ OZ6YN 73
185815 +13  904  YL3NJ YT6AAA R-14
185830  +8  587  YT6AAA YL3NJ RRR
185845  +7  904  YL3NJ YT6AAA 73

10m

UTC    dB Audio  Message
203100 -11  593  YL3NJ SV2CLJ -18
172745 -22 1587  CQ YL3NJ KO36                         a1
204900 -13 1091  YL3NJ DL3NGN JN59
204930 -16 2391  YL3NJ DN9OPA JN38
204930 -19 1091  YL3NJ DL3NGN JN59
205000 -17 2391  YL3NJ DN9OPA JN38 (x4)

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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