W4SFX — 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: United States Most frequent locator attributed to this token: EM94

Receiver-side FT8 activity involving W4SFX, decoded by SO8OO in southeastern Poland. 13 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-07-03.

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 13 FT8 messages attributed to W4SFX as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (92%), followed by 80 m (8%). In this small sample, the estimated median decoder S/N was -14 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-14 dB

Estimated median S/N

Bands

80m · 1 40m · 12

First attributed message: 2026-06-09
Last attributed message: 2026-07-03 01:38 UTC

Observed FT8 message patterns

Attributed sample: 13 messages
Active dates: 2 UTC dates
Estimated median S/N: -14 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 12, 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 W4SFX in decoded directed-looking exchanges:

EA5JKM · Spain ×2 CR7BUW · Portugal F1PBZ · France F5NBU · France G7KNF · England Z31PM · North Macedonia F5RRS · France IK1WGX · Italy OE4AAC · Austria

Most frequent locator attributed to W4SFX

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: EM94 · 2 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 7,959 km (approx.)
Last such locator decoded: 2026-07-03 01:38 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	W4SFX S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-21 02:40	40m	- / -18	G7KNF	+9 / -	14	✓ Closing fragment
10-17 14:18	10m	- / -6	CR7BUW	-14 / -	2	✓ Closing fragment
10-16 14:49	10m	- / -	EA5JKM	-18 / -	5	✓ Closing fragment
10-16 00:52	40m	- / -12	F5NBU	+17 / -	5	✓ Closing fragment
10-16 00:42	40m	- / -2	F1PBZ	+6 / -	4	✓ Closing fragment
10-16 00:37	40m	- / -	F5NBU	+17 / -	4	Partial capture
10-16 00:27	40m	- / -	CT2GQA	-11 / -	5	Partial capture
10-15 03:41	40m	- / -17	DF4WQ	+1 / -	5	Partial capture
10-15 03:20	40m	- / -17	DL1NB	0 / -	3	Partial capture
10-15 03:11	60m	- / -	HA5WA	-20 / -	3	Partial capture
10-15 03:10	60m	- / -18	DK7ZT	-5 / -	4	Partial capture
10-15 03:10	60m	- / -	F5LMJ	-13 / -	3	Partial capture
10-15 03:06	60m	- / -10	OE4AAC	-3 / -	6	✓ Closing fragment
10-15 03:05	60m	- / -18	DK7ZT	-5 / -	3	Partial capture
10-15 03:05	60m	- / -	G0AZH	-8 / -	6	Partial capture
10-15 03:05	60m	- / -14	IK1WGX	+5 / -	3	✓ Closing fragment
10-15 02:55	60m	- / -14	F5RRS	+5 / -	5	✓ Closing fragment
10-15 02:52	60m	- / -16	DK7ZT	-1 / -	4	Partial capture
10-15 02:41	40m	- / -15	Z31PM	-9 / -	2	✓ Closing fragment
10-15 02:40	40m	- / -	F4HKP	-5 / -	3	Partial capture
10-15 02:35	40m	- / -	M9XPN	-10 / -	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
005430 +17 2547  W4SFX F5NBU 73
024015  +8  342  W4SFX G7KNF IO92 (x14)

10m

UTC    dB Audio  Message
144945 -15 1806  W4SFX EA5JKM RR73 (x5)
141830 -15 2495  W4SFX CR7BUW R-06 (x2)

60m

UTC    dB Audio  Message
030815  -4 1020  W4SFX OE4AAC R-10
030815 -10  635  W4SFX G0AZH IO83
030845  -4 1020  W4SFX OE4AAC 73
030845  -3  635  W4SFX G0AZH IO83
031015 -14 1397  W4SFX F5LMJ JN28
031015 -10 2484  W4SFX DK7ZT -18
031045 -13 1397  W4SFX F5LMJ JN28
031045  -3 2484  W4SFX DK7ZT -18
031115 -20 1978  W4SFX HA5WA JN97
031115 -12 1398  W4SFX F5LMJ JN28
031115  -6 2484  W4SFX DK7ZT -18
031145 -19 1978  W4SFX HA5WA JN97
031145  +0 2484  W4SFX DK7ZT -18
031215 -20 1978  W4SFX HA5WA JN97
031345 -20 1399  W4SFX F5LMJ JN28

CW

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

Explore CW reception at SO8OO

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