YU1EU — FT8 activity observed at SO8OO

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

Receiver-side FT8 activity involving YU1EU, decoded by SO8OO in southeastern Poland. 190 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 11 UTC dates in the available aggregate history. Observed between 2026-06-10 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 190 FT8 messages attributed to YU1EU as the transmitting token by decoded message structure across 11 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (61%), followed by 20 m (39%). Several six-hour UTC windows tied for the largest share (65%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.

Overview

190

Messages attributed

UTC dates decoded

Active 15-min windows

-13 dB

Estimated median S/N

Bands

40m · 116 20m · 74

First attributed message: 2026-06-10
Last attributed message: 2026-09-15 16:42 UTC

Observed FT8 message patterns

Attributed sample: 190 messages
Active dates: 11 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -21 to -2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 68, moderate (-15 to -9 dB) 73, strong (≥ -8 dB) 49.

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 YU1EU in decoded directed-looking exchanges:

9A5AGN · Croatia DL2FX · Fed. Rep. of Germany DL9UXF · Fed. Rep. of Germany DL9YNG · Fed. Rep. of Germany F1ODM · France F5NNN · France LZ1BT · Bulgaria PA4DK · Netherlands PD3FR · Netherlands R4HHN · European Russia R6TA · European Russia RL2F · Kaliningrad

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 YU1EU

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 · 52 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 608 km (approx.)
Last such locator decoded: 2026-09-15 16:42 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	YU1EU S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-15 14:08	20m	- / -6	F5OYA/P	-20 / -	3	Partial capture
08-15 13:41	20m	- / -11	R4HHN	-13 / -	2	✓ Closing fragment
08-15 13:37	20m	- / -5	R6TA	+3 / -	2	✓ Closing fragment
08-15 13:24	20m	- / -10	F1ODM	0 / -	2	✓ Closing fragment
08-15 13:07	20m	- / -12	F5NNN	-8 / -	4	✓ Closing fragment
08-15 13:03	20m	-23 / -8	RL3K	-22 / -3	3	✓ Full exchange observed
08-12 19:32	20m	- / -4	PD3FR	-6 / -	4	✓ Closing fragment
07-23 05:32	20m	-3 / -	AH6HY	- / -	3	Partial capture
07-21 12:38	20m	-13 / -4	9A5AGN	-14 / -16	6	✓ Full exchange observed
07-21 12:38	20m	-14 / -	LZ1BT	- / +1	2	✓ Closing fragment
07-14 07:44	20m	-11 / -	AH6HY	- / -13	6	Partial capture
07-13 07:06	20m	- / -11	F4FSY	-18 / -	2	Partial capture
07-13 07:04	20m	-7 / -	SH4UMN	- / -8	2	✓ Closing fragment
07-13 07:03	20m	-8 / -	SJ7SOP	- / -18	2	✓ Closing fragment
07-13 07:02	20m	-6 / -	SP6AXW	- / -19	2	✓ Closing fragment
07-13 07:01	20m	-6 / -	UW4SU	- / +2	2	✓ Closing fragment
07-13 06:57	20m	-9 / -	DL2FX	-20 / -17	5	✓ Closing observed
07-13 06:56	20m	-15 / -	DL9YNG	- / -14	2	✓ Closing fragment
07-13 06:55	20m	-14 / -	OH3DJP	- / -16	2	Partial capture
07-13 06:51	20m	-11 / -	ZC4RH	- / -13	5	Partial capture
07-13 06:26	20m	+1 / -	NH6SS	- / -	2	Partial capture
07-13 06:21	20m	-1 / -	KH6EU	- / -7	6	Partial capture
07-12 20:44	40m	- / -	F5RRS	-12 / -	5	Partial capture
07-12 20:44	40m	-16 / -	RN6LPC	-19 / -11	3	✓ Closing observed
07-12 20:41	40m	-8 / -	Z81D	- / -	3	✓ Closing fragment
07-12 20:03	40m	- / +6	OZ0ZZ	-6 / -	2	✓ Closing fragment
07-12 20:01	40m	-8 / -	EA3CJU	- / -9	3	✓ Closing fragment
07-12 19:58	40m	-12 / -	DH0GBC	-14 / -5	4	✓ Full exchange observed
07-12 19:57	40m	-14 / -	F4JXW	- / -20	2	Partial capture
07-12 19:56	40m	- / -	DK3TNA	-14 / -	2	Partial capture
07-12 19:56	40m	-13 / +4	F6BHK	-22 / -1	3	Partial capture
07-12 19:53	40m	-8 / -	DL6EL	-7 / -3	5	✓ Full exchange observed
07-12 19:52	40m	-9 / -	PH9OY	- / -20	2	✓ Closing fragment
07-12 19:50	40m	-12 / -	UA6AFE	-9 / -3	3	✓ Closing observed
07-12 19:48	40m	-12 / -	RU3DK	- / -9	2	✓ Closing fragment
07-12 19:46	40m	-14 / -	PD0KS	- / -15	2	✓ Closing fragment
07-12 19:43	40m	- / -	DL9KM	-17 / -	4	Partial capture
07-12 19:36	40m	- / -2	SP9EIA	-12 / -	5	✓ Closing fragment
07-12 19:32	40m	-18 / -10	R3DQE	-18 / -	3	✓ Closing observed
07-12 19:31	40m	-18 / -3	PD2TX	-18 / -	2	✓ Closing observed
07-12 19:28	40m	-14 / -	TJ1GD/P	- / -13	2	✓ Closing fragment
07-12 19:22	40m	-8 / -	EA3JJN	- / -9	2	Partial capture
07-12 19:21	40m	-6 / -	DG4BRT	- / -9	2	✓ Closing fragment
07-12 19:20	40m	-11 / -	G1SID	- / -19	2	✓ Closing fragment
07-12 19:18	40m	-21 / -5	SP3BZU	-11 / -3	5	✓ Full exchange observed
07-12 19:17	40m	-14 / -	DL1BJL	- / -7	2	Partial capture
07-12 19:13	40m	-16 / -	SP7TF	-17 / -2	3	✓ Closing observed
07-12 19:07	40m	- / -	DL9KM	-16 / -	4	Partial capture
07-12 19:05	40m	-11 / -	T22TT	- / -5	4	✓ Closing fragment
06-26 07:24	20m	-1 / -	KH7EH	- / -4	4	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
200330  -5  833  YU1EU OZ0ZZ R+06 (x2)
204115  -5 2158  Z81D YU1EU KN04 (x3)
204430 -19 2157  YU1EU RN6LPC LN17
204430 -13 1865  YU1EU F5RRS JN36
204445 -13 2158  RN6LPC YU1EU -11
204500 -14 1865  YU1EU F5RRS JN36
204515 -18 2158  RN6LPC YU1EU RR73
204530 -12 1865  YU1EU F5RRS JN36
204545 -13 2158  DH8KAM YU1EU -14
204600 -10 1865  YU1EU F5RRS JN36 (x2)
164215  +6 1537  RI1FJZ YU1EU KN04

20m

UTC    dB Audio  Message
130545 -24 1691  UB3AZG YU1EU -08
130730  -5  628  YU1EU F5NNN IN94 (x4)
132230 -11 1690  YU1EU UA4FEN +03
132430  -1 1689  YU1EU F1ODM -10 (x2)
133700  +2 2960  YU1EU R6TA R-05 (x2)
134130 -16 1421  YU1EU R4HHN R-11 (x2)
140830 -21 1689  YU1EU F5OYA/P JN13 (x3)

10m

UTC    dB Audio  Message
172645 -21 2137  YU1EU R7TO LN14

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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