YU1AXY — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Serbia Most frequent locator attributed to this token: KN04

Receiver-side FT8 activity involving YU1AXY, decoded by SO8OO in southeastern Poland. 412 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-09-15.

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 412 FT8 messages attributed to YU1AXY as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (64%), followed by 40 m (35%) and 20 m (1%). Several six-hour UTC windows tied for the largest share (78%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (95%); the estimated median was +8.4 dB.

Overview

412

Messages attributed

UTC dates decoded

Active 15-min windows

+8.4 dB

Estimated median S/N

Bands

80m · 265 40m · 144 20m · 3

First attributed message: 2026-06-09
Last attributed message: 2026-09-15 18:15 UTC

Observed FT8 message patterns

Attributed sample: 412 messages
Active dates: 9 UTC dates
Estimated median S/N: +8.4 dB
Estimated 10th-90th percentile: -5 to +17 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 20, strong (≥ -8 dB) 392.

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 YU1AXY in decoded directed-looking exchanges:

EU4U · Belarus ×2 IQ4JO · Italy ×2 UX7QV · Ukraine ×2 4X1UF · Israel 9A7DP · Croatia DF0NN · Fed. Rep. of Germany DF3IS · Fed. Rep. of Germany DK6XY · Fed. Rep. of Germany DK9EU · Fed. Rep. of Germany DL6UCK · Fed. Rep. of Germany DM2AL · Fed. Rep. of Germany F6BHK · France

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 YU1AXY

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: KN04 · 163 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 608 km (approx.)
Last such locator decoded: 2026-09-15 18:15 UTC

Other locator fields attributed to this token: KN03 (38).

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	YU1AXY S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-15 19:02	40m	- / -6	OO0O	-8 / -	4	✓ Closing fragment
09-14 05:59	40m	-8 / -3	YO3GNF	-3 / -	5	✓ Full exchange observed
09-14 05:55	40m	0 / -	PA3CPS	- / -21	5	Partial capture
09-14 05:45	40m	+3 / -	IQ4JO	-24 / -19	3	✓ Closing observed
09-14 05:42	40m	0 / -	DL6UCK	- / 0	2	✓ Closing fragment
09-14 05:38	40m	-2 / -	OH3OJ	-17 / -15	4	✓ Closing observed
09-14 05:37	40m	- / -6	DK7ZT	-10 / -	3	Partial capture
09-14 05:37	40m	+2 / -	HA5IS	- / +8	2	✓ Closing fragment
09-14 05:26	40m	-3 / -	R4FFQ	- / -16	11	Partial capture
09-14 05:25	40m	- / -	OE4DJN	-8 / -	5	Partial capture
09-14 05:25	40m	- / -	PA3CPS	-2 / -	2	Partial capture
09-14 05:21	40m	+6 / -	UT4PA	- / -	2	✓ Closing fragment
09-14 05:21	40m	- / -	EB3JT	-16 / -	2	Partial capture
09-14 05:20	40m	- / -4	DK7ZT	-10 / -	2	Partial capture
09-14 05:18	40m	+4 / -	SV9MBH	- / -	2	✓ Closing fragment
09-13 20:49	40m	- / -	PA1AA	-19 / -	2	Partial capture
09-13 20:38	40m	- / -8	R1BNJ	-4 / -	4	Partial capture
09-13 20:33	40m	- / -17	F6BHK	0 / -	6	✓ Closing fragment
09-13 19:55	40m	- / -	UR9QQ	-4 / -	9	Partial capture
09-13 19:54	40m	- / +3	DK7ZT	-6 / -	4	Partial capture
09-13 19:53	40m	- / -17	IW2IDB	-9 / -	4	✓ Closing fragment
09-13 19:52	40m	- / -9	DK9EU	-10 / -	4	✓ Closing fragment
09-13 19:48	40m	- / -13	OE7LVI	-4 / -	3	✓ Closing fragment
09-13 19:44	40m	- / -2	PC2J	+6 / -	6	✓ Closing fragment
09-13 19:42	40m	- / +7	DK7ZT	-8 / -	3	Partial capture
09-13 19:41	40m	- / -	UR9QQ	-11 / -	3	Partial capture
09-13 19:35	40m	- / -18	DF3IS	+9 / -	3	✓ Closing fragment
09-13 19:34	40m	0 / +7	IZ5ILK	+3 / -4	4	Partial capture
09-11 03:44	80m	+22 / +9	SP5DFK	-6 / -25	5	✓ Full exchange observed
09-11 03:43	80m	- / -	G3WGC	-9 / -	9	Partial capture
09-11 03:43	80m	- / -	RW1AI	-21 / -	2	Partial capture
09-11 03:42	80m	- / -	EA5IT	-24 / -	2	Partial capture
09-11 03:41	80m	+18 / -6	SM7TZK	+1 / -14	5	✓ Full exchange observed
09-11 03:36	80m	+7 / -	9A5MP	- / -21	5	Partial capture
09-11 03:34	80m	+14 / -	DB5GSS	- / -17	2	✓ Closing fragment
09-11 03:32	80m	- / -	G3WGC	-22 / -	7	Partial capture
09-11 03:32	80m	+13 / -3	R7DX	-7 / -	5	✓ Full exchange observed
09-11 03:27	80m	- / -3	R2EA	-14 / -	4	Partial capture
09-11 03:26	80m	+12 / -	Z62NS	-3 / -	4	✓ Full exchange observed
09-11 03:25	80m	- / -	DO9BAU	+2 / -	49	Partial capture
09-11 03:23	80m	+14 / +1	OE5DML	-3 / -9	5	✓ Full exchange observed
09-11 03:20	80m	+10 / +4	IZ5FSO	-13 / +2	6	✓ Full exchange observed
09-11 03:15	80m	+12 / -	TA2EE	- / -25	8	Partial capture
09-11 03:13	80m	+14 / -	S51TN	+7 / +1	5	✓ Full exchange observed
09-11 03:10	80m	+16 / -	CT2GQA	- / -25	2	✓ Closing fragment
09-11 03:09	80m	+17 / +1	DK3TA	-6 / -12	11	✓ Full exchange observed
09-11 03:08	80m	- / -	EA5IT	-23 / -	2	Partial capture
09-11 03:07	80m	- / -	ON4MAP	-21 / -	4	Partial capture
09-11 03:06	80m	- / -	DO9BAU	+1 / -	25	Partial capture
09-11 03:06	80m	- / -15	SP9WLC	+8 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
055830  -1  516  CQ YU1AXY KN04 (x2)
055930  -7  517  YO3GNF YU1AXY +11
055945  -6  516  YU1AXY YO3GNF R-03
060000  -8  517  YO3GNF YU1AXY RR73
060015  +0  516  YU1AXY YO3GNF 73 (x2)
181400  +4  516  IN3IZQ YU1AXY KN04
181500  +9  516  SQ9SZ YU1AXY KN04
185200 -23 1874  YU1AXY HB9ZHK JN47
185330  -4  907  YU1AXY DL6YEK R-14
190200  -9  341  YU1AXY OO0O JO11 (x4)

80m

UTC    dB Audio  Message
034700  -5 1803  YU1AXY G3WGC JO02
034700  +5 2502  YU1AXY DO9BAU JO62 (x11)
045215  -9  482  CQ YU1AXY KN04                        a1 (x3)

20m

UTC    dB Audio  Message
163545  +2 1315  YU1AXY R4IK -23 (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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