W4VKU — 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: FM05

Receiver-side FT8 activity involving W4VKU, decoded by SO8OO in southeastern Poland. 31 FT8 messages attributed to this token as transmitter, on 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-09-04 and 2026-11-04.

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 31 FT8 messages attributed to W4VKU 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 (100%). In this small sample, the estimated median decoder S/N was 0 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

0 dB

Estimated median S/N

Bands

40m · 31

First attributed message: 2026-09-04
Last attributed message: 2026-11-04 04:25 UTC

Observed FT8 message patterns

Attributed sample: 31 messages
Active dates: 2 UTC dates
Estimated median S/N: 0 dB
Estimated 10th-90th percentile: -6 to +4 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 1, strong (≥ -8 dB) 30.

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 W4VKU in decoded directed-looking exchanges:

OA4ENG · Peru ×2 5B4AMX · Cyprus AC9HP · United States EA5D · Spain N3YPL · United States R6TA · European Russia SP5MXZ · Poland

Most frequent locator attributed to W4VKU

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: FM05 · 5 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 7,754 km (approx.)
Last such locator decoded: 2026-09-04 00:40 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	W4VKU S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-05 02:55	160m	- / -4	5B4AMX	-19 / -	4	✓ Closing fragment
11-04 04:25	40m	+5 / -	KO4FQW	- / -18	2	Partial capture
11-04 04:21	40m	- / +6	M9DNC	-11 / -	4	Partial capture
11-04 04:21	40m	-3 / +2	OS4K	-21 / -19	2	Partial capture
11-04 04:21	40m	- / -	UR6II	-6 / -	2	Partial capture
11-04 04:19	40m	-2 / -	SP5MXZ	- / -16	2	✓ Closing fragment
11-04 04:19	40m	- / -	R7NY	-7 / -	3	Partial capture
11-04 04:19	40m	-2 / -16	UB6OFG	+3 / -18	17	Partial capture
11-04 04:18	40m	-3 / -	R6TA	- / -15	2	Partial capture
11-04 04:18	40m	+1 / +1	EA5D	-16 / -7	7	✓ Full exchange observed
09-04 00:40	40m	+1 / -	N3YPL	- / +5	3	✓ Closing fragment
09-04 00:39	40m	+3 / -6	EB3JT	-6 / -11	6	Partial capture
09-04 00:37	40m	+2 / -	<...>	- / -16	2	Partial capture
09-04 00:36	40m	- / -12	R2BQM	+4 / -	5	Partial capture
09-04 00:34	40m	+1 / -	AC9HP	- / -12	5	✓ Closing fragment
09-04 00:32	40m	-2 / -	OA4ENG	- / -10	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
034600  -8  652  W4VKU 6W/IK2HKT -02

160m

UTC    dB Audio  Message
025515 -24 2094  W4VKU 5B4AMX -04 (x4)

40m

UTC    dB Audio  Message
042230  -1 2705  W4VKU UB6OFG R-16 (x2)
042315  -3 2863  OS4K W4VKU R-19
042330  +9 2705  W4VKU UB6OFG R-16
042330 -12  254  W4VKU M9DNC +06
042345  -3 2863  UB6OFG W4VKU -17
042400  +6 2705  W4VKU UB6OFG R-18
042415  +5 2863  UB6OFG W4VKU -17
042430  +6 2705  W4VKU UB6OFG R-18 (x2)
042500  -9  254  W4VKU M9DNC +06
042515  +3 2863  KO4FQW W4VKU -18
042530  +3 2705  W4VKU UB6OFG R-15
042545  +7 2863  KO4FQW W4VKU -18
042600  +5 2705  W4VKU UB6OFG R-15

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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