EU4U — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Belarus Most frequent locator attributed to this token: KO23

Receiver-side FT8 activity involving EU4U, decoded by SO8OO in southeastern Poland. 7,118 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, across 95 UTC dates in the available aggregate history. Observed between 2026-07-02 and 2026-10-23.

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 7,118 FT8 messages attributed to EU4U as the transmitting token by decoded message structure across 95 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (90%), followed by 80 m (5%) and 20 m (4%). Most decodes (59%) fell within the six-hour window 16:00-22:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (90%); the estimated median was -0.2 dB.

Overview

7,118

Messages attributed

UTC dates decoded

552

Active 15-min windows

-0.2 dB

Estimated median S/N

Bands

160m · 87 80m · 324 40m · 6,398 20m · 309

First attributed message: 2026-07-02
Last attributed message: 2026-10-23 05:54 UTC

Observed FT8 message patterns

Attributed sample: 7,118 messages
Active dates: 95 UTC dates
Estimated median S/N: -0.2 dB
Estimated 10th-90th percentile: -9 to +9.3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 39, moderate (-15 to -9 dB) 695, strong (≥ -8 dB) 6,384.

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 EU4U in decoded directed-looking exchanges:

R5AV · European Russia ×5 GJ0KYZ · Jersey ×4 UA3PTY · European Russia ×4 DM2MR · Fed. Rep. of Germany ×3 MW7RHR · Wales ×3 R2PX · European Russia ×3 UA9SY · Asiatic Russia ×3 UB3LBU · European Russia ×3 DD1MI · Fed. Rep. of Germany ×2 DL8RBL · Fed. Rep. of Germany ×2 HA7CH · Hungary ×2 JL1RUC · Japan ×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 EU4U

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: KO23 · 4,951 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 454 km (approx.)
Last such locator decoded: 2026-10-23 05:54 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	EU4U S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-23 05:51	40m	+16 / -	SP5KG	- / -8	2	✓ Closing fragment
10-23 05:46	40m	+10 / +2	OV9A	-9 / +5	4	✓ Full exchange observed
10-23 05:42	40m	+10 / +7	DL6YES	-14 / -18	9	✓ Full exchange observed
10-22 23:23	80m	+7 / -5	HA7UL	+7 / -7	5	✓ Full exchange observed
10-21 23:17	160m	+13 / -	7P8GE	- / -20	12	Partial capture
10-21 23:10	160m	+13 / -	7P8GE	- / -	10	Partial capture
10-21 22:47	160m	+15 / -	7P8GE	- / -	15	Partial capture
10-21 22:20	160m	+14 / -	7P8GE	- / -	10	Partial capture
10-21 22:14	160m	+13 / -	7P8GE	- / -	4	Partial capture
10-21 22:06	160m	+11 / -	7P8GE	- / -	5	Partial capture
10-21 21:53	160m	+7 / -	7P8GE	- / -	3	Partial capture
10-21 21:42	160m	+9 / -	7P8GE	- / -	3	Partial capture
10-21 18:10	40m	- / 0	R6LQU	-8 / -	2	✓ Closing fragment
10-21 06:04	40m	+12 / -	DL1HRC	-12 / -7	4	✓ Closing observed
10-21 06:02	40m	+10 / -	N2LEE	- / -13	2	✓ Closing fragment
10-21 05:57	40m	+10 / -	RX3DCZ	- / -6	2	✓ Closing fragment
10-21 05:55	40m	+7 / -	UB4CIA	-2 / -5	4	✓ Closing observed
10-21 05:50	40m	- / -5	G0HSP	+5 / -	3	✓ Closing fragment
10-20 18:43	40m	- / -9	F4WCW	-8 / -	2	✓ Closing fragment
10-20 18:19	40m	- / 0	G0VHH	-21 / -	2	Partial capture
10-20 18:06	40m	- / -7	IZ6NNH	+2 / -	4	✓ Closing fragment
10-20 17:49	40m	- / -	IW7EGX	-6 / -	2	Partial capture
10-20 17:46	40m	- / +10	ON5ED	+8 / -	3	✓ Closing fragment
10-20 17:35	40m	+3 / 0	RX6ATU	0 / -18	7	✓ Full exchange observed
10-20 17:29	40m	+2 / -	BI3UPU	- / -18	2	✓ Closing fragment
10-20 07:22	40m	+7 / -3	DG5YHK	-8 / -7	5	✓ Full exchange observed
10-20 07:18	40m	+8 / -14	DJ1TU	-7 / +1	5	✓ Full exchange observed
10-20 07:12	40m	-4 / -	G0CUT	- / -19	2	✓ Closing fragment
10-20 05:54	40m	+6 / -	KL7J	- / -18	7	Partial capture
10-20 05:53	40m	+5 / -	UA9SY	- / -13	2	✓ Closing fragment
10-20 05:47	40m	+6 / -	F8VNU	-12 / -6	5	✓ Closing observed
10-20 05:46	40m	+4 / -	R1QAV	- / -13	2	✓ Closing fragment
10-19 05:46	40m	+6 / -	R4SF	- / -12	3	✓ Closing fragment
10-19 05:44	40m	+10 / -4	PC6A	-7 / -1	3	✓ Full exchange observed
10-19 05:39	40m	+8 / -	PD1PET	- / -24	2	✓ Closing fragment
10-19 05:35	40m	0 / -	PI4S/J	- / -13	4	Partial capture
10-18 18:30	40m	- / -8	UB9USV	-14 / -	2	Partial capture
10-18 07:11	40m	+1 / -	ON5EL	- / -15	2	✓ Closing fragment
10-18 06:36	40m	+6 / -	SP3WBV	- / -7	2	✓ Closing fragment
10-18 06:34	40m	+6 / -	OZ7SP/J	- / -14	2	Partial capture
10-18 06:32	40m	+12 / -	RK3YWS/P	- / -9	2	✓ Closing fragment
10-18 06:24	40m	+7 / -8	MW7RHR	-10 / +1	4	✓ Full exchange observed
10-18 06:20	40m	+12 / +1	DK9GZ	-10 / -16	5	✓ Full exchange observed
10-18 06:18	40m	+9 / -16	UA1ALY	-14 / -7	8	✓ Full exchange observed
10-18 06:16	40m	+7 / -12	IV3FHI	-8 / -13	7	✓ Full exchange observed
10-18 06:14	40m	+6 / -	DF7QR	-7 / -8	4	✓ Full exchange observed
10-18 06:06	40m	+12 / -	F6HQG	- / -13	2	Partial capture
10-18 06:06	40m	+11 / +5	R4FDD	-10 / -1	9	✓ Full exchange observed
10-18 05:59	40m	+6 / -	HB9SWR/P	- / -12	2	Partial capture
10-18 05:56	40m	+10 / -	YV5YDT	- / -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
054645  +9 2822  OV9A EU4U +05
054700  -8  733  EU4U OV9A R+02
054715 +12 2822  OV9A EU4U RR73
054730 -10  733  EU4U OV9A 73
054745 +10 2822  CQ EU4U KO23 (x8)
055145 +13 2820  SP5KG EU4U -08 (x2)
055445 +12 2818  CQ EU4U KO23

80m

UTC    dB Audio  Message
053230 +11 2692  CQ EU4U KO23 (x2)
053315 +15 2692  EU4U OK1FMH R-05
054100  +3 2654  EU4U DA6DN JO43
232145  -2 2789  CQ EU4U KO23 (x3)
232300 +12  912  EU4U HA7UL JN97
232315  +3 2789  HA7UL EU4U -07
232330  +5  912  EU4U HA7UL R-05
232345 +11 2789  HA7UL EU4U RR73
232400  +3  912  EU4U HA7UL 73
232415  +4 2789  CQ EU4U KO23 (x3)

160m

UTC    dB Audio  Message
231345 +14 1998  7P8GE EU4U KO23 (x15)

10m

UTC    dB Audio  Message
093445 -22 2159  EU4U RV6HE RR73
103115 -21 1870  EU4U 7Z1MM +07

20m

UTC    dB Audio  Message
035430 -19 1769  EU4U RV9CD MO06 (x4)
035845  -9 3085  EU4U UB8CPH 73
035945 -12  658  EU4U R8FH 73
172230 -15 1051  EU4U PE1JDR JO21
172330  -4 1134  EU4U DF1WR JN39 (x3)
173700  -6 1616  EU4U <...> R-13 (x3)
174345 -18 2645  CQ EU4U KO23                          a1
175130  +1 2642  EU4U M7GYP IO93

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.

CW

4 CW reception events in the last 30 days.

40m: 2 events; last heard 2026-10-16 17:19 UTC
80m: 2 events; last heard 2026-10-04 03:36 UTC

Latest CW receptions

UTC	Band	kHz	S/N · 500 Hz	WPM	Listen
2026-10-16 17:19:42	40m	7022.822	12.9 dB	23.3	WebSDR ↗
2026-10-16 17:16:47	40m	7022.822	6.5 dB	—	WebSDR ↗
2026-10-04 03:36:29	80m	3567.795	14.8 dB	24.7	WebSDR ↗
2026-10-04 03:35:02	80m	3567.795	11.9 dB	24.2	WebSDR ↗

CW reception history

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