US3EX — 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: Ukraine

Receiver-side FT8 activity involving US3EX, decoded by SO8OO in southeastern Poland. 69 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 14 UTC dates in the available aggregate history. Observed between 2026-06-13 and 2026-11-01.

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 69 FT8 messages attributed to US3EX as the transmitting token by decoded message structure across 14 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 (93%), 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

40m · 42 20m · 27

First attributed message: 2026-06-13
Last attributed message: 2026-11-01 14:59 UTC

Observed FT8 message patterns

Attributed sample: 69 messages
Active dates: 14 UTC dates
Estimated median S/N: -4 dB
Estimated 10th-90th percentile: -16 to +8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 13, 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 US3EX in decoded directed-looking exchanges:

A41HA · Oman EU2ABK · Belarus EU4BE · Belarus EU6UE · Belarus EW4DX · Belarus EW8R · Belarus LY2BSW · Lithuania OE2CAL · Austria UR5FLN · Ukraine UT0IN · Ukraine UW8SM · Ukraine YC4PCR · Indonesia

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.

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	US3EX S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-01 14:58	40m	-6 / -	4X5CG	- / -15	2	Partial capture
10-29 17:23	40m	0 / -	E25IJJ	- / -16	3	Partial capture
10-29 17:16	40m	-4 / -	UR6EA	- / -18	2	Partial capture
10-29 16:57	80m	- / -9	YO2CK	-4 / -	2	✓ Closing fragment
10-29 16:32	40m	-12 / -8	DL6NDN	-1 / -11	3	Partial capture
10-29 16:28	40m	-9 / -8	PH2M	-4 / -8	2	Partial capture
10-29 16:27	40m	-8 / -	EU4BE	- / -10	2	✓ Closing fragment
10-29 16:25	40m	- / -11	RC9WC	-10 / -	3	Partial capture
10-29 16:25	40m	- / -	UA4FKT	+8 / -	3	Partial capture
10-29 16:24	40m	-3 / -	EW4DX	- / -2	2	✓ Closing fragment
10-24 17:58	40m	-15 / -	YC4PCR	- / -14	3	✓ Closing fragment
10-24 17:36	40m	-8 / -	YC4PCR	- / -19	2	Partial capture
10-24 17:28	40m	+3 / -	ZL1VAH	- / -20	3	✓ Closing fragment
10-24 17:26	40m	-2 / -	A41HA	-3 / -7	3	✓ Closing observed
10-24 17:23	40m	-2 / -	UW8SM	- / +1	2	✓ Closing fragment
10-24 17:21	40m	-9 / +1	LY2BSW	-5 / -	3	✓ Closing observed
10-24 17:19	40m	-2 / -4	OE2CAL	+9 / -3	4	✓ Full exchange observed
10-24 17:15	40m	-2 / -11	EU6UE	-12 / -	3	✓ Closing observed
10-19 02:05	40m	- / -	UA4FKT	+10 / -	2	Partial capture
10-10 14:19	40m	- / +6	LZ936BA	-4 / -	2	Partial capture
10-10 14:18	40m	- / -	UA4FKT	-7 / -	3	Partial capture
10-10 06:18	40m	-12 / 0	EW8AAC	-16 / -8	3	Partial capture
10-10 06:15	40m	- / -	UR5FLN	-10 / -	2	✓ Closing fragment
10-04 13:17	40m	- / -11	EW8R	0 / -	2	✓ Closing fragment
09-19 15:37	40m	- / -10	UT0IN	+6 / -	3	✓ Closing fragment
09-19 15:35	40m	-3 / -13	EU2ABK	+8 / -12	5	✓ Full exchange observed
08-23 14:50	20m	-2 / -	XU7O	- / -11	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
162745  -9  656  EU4BE US3EX RR73
162845  -9  630  PH2M US3EX -08
162900  -4  964  US3EX PH2M R-08
163200 -12 2241  DL6NDN US3EX -11
163245  +4 2240  US3EX DL6NDN R-08 (x3)
171645  -3  604  UR6EA US3EX -18 (x2)
171845 -12 1400  OL900LTV US3EX -01
172315  +3  601  E25IJJ US3EX -16 (x3)
145845  -4 2637  4X5CG US3EX -15 (x2)

80m

UTC    dB Audio  Message
165730  -4 1567  US3EX YO2CK R-09 (x2)

20m

UTC    dB Audio  Message
144745  +7  413  DK5CR/QRP US3EX -06
145045  -4  456  XU7O US3EX -11 (x2)
145315 -14 1136  <...> US3EX -17
145445  -1 2088  AP2TN US3EX -08
150315  +1  960  OZ/KD0NDU US3EX -08

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

CW history is temporarily unavailable.

Explore CW reception at SO8OO

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