W4PKU — 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: FM18

Receiver-side FT8 activity involving W4PKU, decoded by SO8OO in southeastern Poland. 36 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-13 and 2026-10-23.

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 36 FT8 messages attributed to W4PKU as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (75%), followed by 40 m (22%) and 10 m (3%). Most decodes (94%) fell within the six-hour window 16:00-22:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-11 dB

Estimated median S/N

Bands

40m · 8 20m · 27 10m · 1

First attributed message: 2026-06-13
Last attributed message: 2026-10-23 13:31 UTC

Observed FT8 message patterns

Attributed sample: 36 messages
Active dates: 9 UTC dates
Estimated median S/N: -11 dB
Estimated 10th-90th percentile: -18 to -6 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 9, moderate (-15 to -9 dB) 14, strong (≥ -8 dB) 13.

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 W4PKU in decoded directed-looking exchanges:

TN8GD · Republic of the Congo IK4LZH · Italy JE1LET · Japan MM0DXL · Scotland YT2FA · Serbia

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 W4PKU

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: FM18 · 17 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 7,390 km (approx.)
Last such locator decoded: 2026-10-23 13:31 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	W4PKU S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-02 20:58	40m	- / -	F8MRQ	+8 / -	2	Partial capture
11-02 20:58	40m	- / -14	SV5BYP	+1 / -	4	Partial capture
11-02 20:51	40m	- / -	G0OOF	+2 / -	3	Partial capture
11-02 20:50	40m	- / -	EA3ACA	-15 / -	4	Partial capture
10-21 20:44	40m	- / -26	YO3TEP	-11 / -	4	Partial capture
10-21 20:36	40m	- / -14	F4ANC	-7 / -	18	Partial capture
10-06 21:23	40m	- / -	DF1IH	-10 / -	4	Partial capture
10-06 21:22	40m	- / -	DK5WL	-10 / -	3	Partial capture
10-06 21:13	40m	- / -7	F6FHZ	-14 / -	4	Partial capture
09-08 21:57	40m	- / -1	MM0DXL	-14 / -	6	✓ Closing fragment
09-08 21:43	40m	-12 / -	5Z4VJ	- / +8	2	Partial capture
09-08 21:36	40m	- / -14	SV8/F6BLP	+1 / -	11	Partial capture
09-08 21:19	40m	- / -15	F5RRS	+9 / -	5	Partial capture
09-08 21:18	40m	- / -11	SY1BKQ	+14 / -	2	Partial capture
09-08 20:55	40m	- / -24	YO7BPC	-15 / -	6	Partial capture
09-07 21:30	40m	- / -	LB7ZG	+4 / -	2	Partial capture
09-07 21:28	40m	-16 / -19	YT2FA	-3 / -4	4	✓ Full exchange observed
08-21 15:03	20m	- / -15	BA5AN	-21 / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
224015 -10 2126  W4PKU EA8UP -23

40m

UTC    dB Audio  Message
204630 -14 2200  W4PKU YO3TEP R-26
211245 -18 2210  AP5ARS W4PKU FM18
205000 -13  982  W4PKU EA3ACA JN01 (x2)
205100  +5 2970  W4PKU G0OOF IO81
205100 -17  982  W4PKU EA3ACA JN01
205130  +0 2970  W4PKU G0OOF IO81
205130 -17  982  W4PKU EA3ACA JN01
205200  +1 2970  W4PKU G0OOF IO81
205800  +2 1419  W4PKU SV5BYP -14
205800  +7  694  W4PKU F8MRQ JN17
205830  +3 1419  W4PKU SV5BYP -14
205830 +10  694  W4PKU F8MRQ JN17
205900  +0 1419  W4PKU SV5BYP -14 (x2)

10m

UTC    dB Audio  Message
152000 -10  722  W4PKU TN8GD RR73
133115 -24 1862  EP2AES W4PKU FM18

20m

UTC    dB Audio  Message
204730 -17 1583  W4PKU 4Z1GY KM72
145515 -18 1232  W4PKU JE1LET RR73
150045  -7 1472  W4PKU DL1SWB JO53
150345 -21 2095  W4PKU BA5AN PM00 (x3)
151615  -4  462  W4PKU IK4LZH 73

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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