4X5EX — 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: Israel Most frequent locator attributed to this token: KM71

Receiver-side FT8 activity involving 4X5EX, decoded by SO8OO in southeastern Poland. 25 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 3 UTC dates in the available aggregate history. Observed between 2026-07-16 and 2026-10-31.

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 25 FT8 messages attributed to 4X5EX as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (92%), followed by 20 m (8%). In this small sample, the estimated median decoder S/N was -19 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-19 dB

Estimated median S/N

Bands

20m · 2 10m · 23

First attributed message: 2026-07-16
Last attributed message: 2026-10-31 08:56 UTC

Observed FT8 message patterns

Attributed sample: 25 messages
Active dates: 3 UTC dates
Estimated median S/N: -19 dB
Estimated 10th-90th percentile: -24 to -14 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 19, moderate (-15 to -9 dB) 6, strong (≥ -8 dB) 0.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with 4X5EX in decoded directed-looking exchanges:

DN9MCL · Fed. Rep. of Germany F1PBZ · France F4IGI · France SQ9LOJ · Poland VK4AEX · Australia

Most frequent locator attributed to 4X5EX

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: KM71 · 3 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,325 km (approx.)
Last such locator decoded: 2026-10-31 08:45 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	4X5EX S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-31 08:55	10m	-21 / -	US5WDP	- / -	2	Partial capture
10-31 08:52	10m	-21 / -	PD1ADA	- / -25	3	Partial capture
10-31 08:50	10m	-19 / -	SQ9LOJ	- / -1	3	✓ Closing fragment
10-31 08:46	10m	-18 / -	DM3YBN	- / -25	6	Partial capture
10-31 08:45	10m	-14 / -	DN9MCL	- / -15	3	✓ Closing fragment
10-31 08:43	10m	-13 / -	SP5GRM	- / -5	2	Partial capture
10-31 08:42	10m	-22 / -	VK4AEX	- / -16	2	✓ Closing fragment
08-08 18:11	10m	- / -2	F4IGI	-16 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
084700 -18 1808  DM3YBN 4X5EX -25 (x3)
084830 -19 1809  DL3HWD 4X5EX -25
084900 -19 1809  DM3YBN 4X5EX RRR (x2)
085000 -19 1808  SQ9LOJ 4X5EX -01 (x3)
085200 -20 1808  SQ8XY 4X5EX RRR
085230 -20 1808  PD1ADA 4X5EX -25 (x3)
085530 -20 1808  US5WDP 4X5EX RRR (x2)

CW

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

Explore CW reception at SO8OO

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