UA4FEN — 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: European Russia Most frequent locator attributed to this token: LO23

Receiver-side FT8 activity involving UA4FEN, decoded by SO8OO in southeastern Poland. 6,535 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 108 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-22.

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 6,535 FT8 messages attributed to UA4FEN as the transmitting token by decoded message structure across 108 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (58%), followed by 40 m (32%) and 80 m (5%). Most decodes (77%) fell within the six-hour window 14:00-20:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (67%); the estimated median was -4 dB.

Overview

6,535

Messages attributed

108

UTC dates decoded

750

Active 15-min windows

-4 dB

Estimated median S/N

Bands

160m · 105 80m · 312 40m · 2,113 20m · 3,813 10m · 192

First attributed message: 2026-06-06
Last attributed message: 2026-10-22 16:49 UTC

Observed FT8 message patterns

Attributed sample: 6,535 messages
Active dates: 108 UTC dates
Estimated median S/N: -4 dB
Estimated 10th-90th percentile: -15.5 to +11 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 655, moderate (-15 to -9 dB) 1,488, strong (≥ -8 dB) 4,392.

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 UA4FEN in decoded directed-looking exchanges:

R3YCJ · European Russia ×2 R4RJ · European Russia ×2 RM5F · European Russia ×2 BG0FQU · China ×2 EA5JLN · Spain ×2 LZ6C · Bulgaria ×2 M6ILA · England ×2 M7VME/P · England ×2 PA2PAT · Netherlands ×2 RA3WPF · European Russia ×2 SP7FID · Poland ×2 SQ7FPH · Poland ×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 UA4FEN

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: LO23 · 91 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,639 km (approx.)
Last such locator decoded: 2026-10-13 18:40 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	UA4FEN S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-22 16:52	40m	- / -25	DG9EAL	-6 / -	2	Partial capture
10-22 16:48	40m	-8 / -	DL8CKL	- / -5	3	✓ Closing fragment
10-22 16:47	40m	-6 / -	BA7NLL	- / -22	2	✓ Closing fragment
10-21 19:03	80m	-10 / -	EU7DW	- / -9	2	Partial capture
10-21 19:00	80m	-12 / -12	DH0BRO	+4 / -14	8	✓ Full exchange observed
10-21 18:29	160m	-8 / +2	R7MR	0 / +6	4	✓ Full exchange observed
10-21 18:27	160m	-13 / -	R8DX	- / +1	4	Partial capture
10-21 18:25	160m	-1 / -	ON4GG	- / -18	2	Partial capture
10-21 18:23	160m	-10 / -	E73DPR	- / -24	3	Partial capture
10-21 18:21	160m	-13 / -8	R8DX	-13 / +4	4	Partial capture
10-21 18:19	160m	-13 / -	RA3RGQ	- / -10	5	✓ Closing fragment
10-21 18:11	160m	-17 / -	R8DX	- / +2	6	Partial capture
10-21 18:08	160m	-6 / -1	R6HV	-14 / -4	5	✓ Full exchange observed
10-21 18:07	160m	-8 / +3	R4RJ	-15 / -1	4	✓ Full exchange observed
10-21 17:30	80m	-5 / -	EU7DW	- / -2	2	Partial capture
10-21 17:17	40m	-9 / -	DG4LXM	- / -13	2	Partial capture
10-21 17:15	40m	-10 / -	PA0EJT	- / -5	3	Partial capture
10-21 17:14	40m	-12 / -4	IZ0RPS	+10 / 0	4	✓ Full exchange observed
10-21 17:12	40m	-16 / -	JO4JDU	- / -23	4	Partial capture
10-21 17:07	40m	-11 / -7	M7FSE	-16 / -20	5	Partial capture
10-21 17:05	40m	-5 / -	IK7DTP	- / -13	2	Partial capture
10-21 17:03	40m	-9 / -	IK7QMJ	- / -16	2	Partial capture
10-21 16:59	40m	-13 / -	M7FSE	- / -16	4	Partial capture
10-21 16:57	40m	-9 / -	DD0IPA	- / -20	2	Partial capture
10-21 16:54	40m	+8 / -	YO5QDN	- / -8	2	Partial capture
10-21 16:53	40m	+3 / +3	IU3VQA	0 / -24	4	✓ Full exchange observed
10-21 16:51	40m	-8 / -	IZ8KAW	- / -10	4	Partial capture
10-21 16:50	40m	- / +5	G8TKY	-12 / -	2	✓ Closing fragment
10-21 16:47	40m	-8 / -	SQ9JKV	- / -13	4	Partial capture
10-21 16:43	40m	-4 / -	OH8HTG	- / -17	4	Partial capture
10-21 16:39	40m	-9 / -	PD2NBE	- / -17	2	Partial capture
10-21 16:38	40m	-4 / -16	IZ7DJY	-16 / -10	3	✓ Full exchange observed
10-21 16:36	40m	-6 / -	PD0LEX	- / -23	4	Partial capture
10-20 17:13	40m	-14 / -14	OH2TD	-6 / -6	4	✓ Full exchange observed
10-20 17:11	40m	-8 / -	SQ9DHD	- / -21	2	Partial capture
10-20 17:10	40m	0 / -	F1MGE	- / -13	2	Partial capture
10-18 19:04	40m	-3 / -5	2E0MCP	-16 / -	3	✓ Closing observed
10-18 19:02	40m	-8 / -4	PH9OY	-16 / -16	5	Partial capture
10-18 17:38	80m	-8 / -	R3XDT	- / -18	3	Partial capture
10-18 17:34	80m	- / -18	HA5OV	+12 / -	2	✓ Closing fragment
10-18 17:31	80m	- / -	R4FES	-16 / -	2	✓ Closing fragment
10-17 19:54	80m	-12 / -	R3BAV	- / -16	2	Partial capture
10-17 19:48	80m	-16 / -9	OK2UPG	+18 / -20	2	Partial capture
10-17 19:45	80m	-17 / -	SP6ZC	- / -19	2	Partial capture
10-17 18:09	80m	- / -10	UB1AXF	-6 / -	2	✓ Closing fragment
10-17 17:59	40m	-7 / -8	GI3PXT	-4 / -10	6	✓ Full exchange observed
10-17 17:58	40m	- / -17	DL6UJ	+9 / -	3	Partial capture
10-17 17:55	40m	-11 / -13	OM6AOM	-9 / -14	2	Partial capture
10-17 17:50	40m	0 / -	G0RWF	- / -15	4	Partial capture
10-17 17:49	40m	-9 / -4	DD3ZZ	-3 / -19	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
171530  -4  283  PA0EJT UA4FEN -05 (x3)
171700  -1 2188  DG4LXM UA4FEN -13 (x2)
171830  -7 2394  PA2DX UA4FEN -15
164345  -6 2614  DL8CKL UA4FEN -05
164645  +3  344  SP/WE9G UA4FEN -13
164745  -7  632  BA7NLL UA4FEN -22 (x2)
164845  -5 2615  DL8CKL UA4FEN -05 (x3)
165200  -6 1688  UA4FEN DG9EAL R-25 (x2)

80m

UTC    dB Audio  Message
174000  -8  566  OK1YQ UA4FEN -05
172215 -12 1712  UA4QK UA4FEN RR73
173000  -2  653  EU7DW UA4FEN -02 (x2)
185915 -11 1603  SQ8GBG UA4FEN -04
190015 -14 1560  DH0BRO UA4FEN -14
190030  +2 1559  UA4FEN DH0BRO R-12
190045 -14 1561  DH0BRO UA4FEN -14
190100  +6 1559  UA4FEN DH0BRO R-12
190115 -11 1561  DH0BRO UA4FEN -14
190130  +2 1558  UA4FEN DH0BRO R-12
190145  -7 1560  DH0BRO UA4FEN RR73
190200  +5 1369  UA4FEN DH0BRO 73
190315 -11 1358  EU7DW UA4FEN -09 (x2)

160m

UTC    dB Audio  Message
182245 -13 1340  R8DX UA4FEN +04
182330 -10 2735  E73DPR UA4FEN -24 (x2)
182430 -13 1590  UA4FEN R8DX R-08
182430 -10 2735  E73DPR UA4FEN -24
182545  +0  390  ON4GG UA4FEN -18 (x2)
182715 -16 1589  R8DX UA4FEN +01 (x4)
182915  -7  549  R7MR UA4FEN +06
182930  +0  549  UA4FEN R7MR R+02
182945  -8  549  R7MR UA4FEN RR73
183000  +1  549  UA4FEN R7MR RRR

60m

UTC    dB Audio  Message
175800 -19 1177  UA4FEN F4LPO JN23

10m

UTC    dB Audio  Message
101830 -21 1486  UA4FEN HB3YPW 73
113600 -24 1769  UA4FEN <...> R-09

20m

UTC    dB Audio  Message
170545  +6 2884  GM0OPS UA4FEN +18
170600  +6 2990  UA4FEN GM0OPS R-07 (x2)
170645  -2 1902  OE3BHM UA4FEN -05 (x2)
170730  -2 1903  UA4FEN OE3BHM 73
175000 +12  364  DK3RV UA4FEN -04
175030 +11  730  PD5DSL UA4FEN -10 (x3)
175215  +0 1023  DL8WTF UA4FEN +03 (x2)
175330  +5 1798  PE2LRT UA4FEN +01 (x3)

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

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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