W4PKU — FT8 activity observed at SO8OO

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. 32 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-13 and 2026-09-08.

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 32 FT8 messages attributed to W4PKU as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (84%), followed by 40 m (16%). Most decodes (97%) 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 -10 dB.

Overview

32
Messages attributed
6
UTC dates decoded
8
Active 15-min windows
-10 dB
Estimated median S/N

Bands

40m · 5 20m · 27
First attributed message: 2026-06-13
Last attributed message: 2026-09-08 21:44 UTC

Observed FT8 message patterns

Attributed sample
32 messages
Active dates
6 UTC dates
Estimated median S/N
-10 dB
Estimated 10th-90th percentile
-16 to -6 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, 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:

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 · 13 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
7,390 km (approx.)
Last such locator decoded
2026-09-08 21:43 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 UTCBandW4PKU S/NCounterpartCounterpart S/NMsgsCapture
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
08-05 21:36 20m -13 / - VK2VAR - / -14 5 Partial capture
08-05 21:30 20m -9 / - RA3ZH - / -10 4 Partial capture
08-05 21:24 20m -13 / - OD5ZZ - / -2 4 Partial capture
08-05 21:21 20m -6 / -5 MW0DNF 0 / +4 4 Partial capture
07-29 14:06 10m - / - G4TTQ -22 / - 2 Partial capture
07-28 20:09 20m -7 / - EK/RX3DPK - / - 5 Partial capture
07-22 14:49 20m - / - PD0DDA -14 / - 2 Partial capture
07-22 14:43 20m - / - PD0DDA -16 / - 3 Partial capture
07-22 14:43 20m - / -12 PD1ANF -18 / - 2 Partial capture
07-22 14:38 20m - / -14 R2SN -7 / - 2 Partial capture
07-22 14:37 20m - / -13 UA3RAU -12 / - 2 ✓ Closing fragment
07-22 14:24 20m - / -7 R2SN -2 / - 3 Partial capture
07-13 14:27 20m - / - PD1ADA -18 / - 4 Partial capture
07-13 14:21 20m - / -8 PD1ADA -24 / - 3 Partial capture
07-10 14:16 20m - / +3 DL2ROB -18 / - 4 Partial capture
07-04 18:48 20m - / -10 DG0LHH +4 / - 3 Partial capture
07-04 18:36 20m - / -12 E70A +1 / - 5 ✓ Closing fragment
07-03 15:26 20m - / - UF4S -20 / - 2 ✓ Closing fragment
06-25 15:20 10m - / - F1TXI -9 / - 3 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
213830  -4  433  W4PKU SV8/F6BLP -15 (x6)
214330 -13 2534  5Z4VJ W4PKU FM18 (x2)
214445  -1 2533  W4PKU M7DFM -03
215745 -22 2031  W4PKU MM0DXL IO75 (x6)
20m 
UTC    dB Audio  Message
213215 -10  397  RA3ZH W4PKU -10
213615 -17 1157  VK2VAR W4PKU FM18 (x5)
143430 -20 2032  W4PKU PD1ADA JO21
143700 -17 1762  W4PKU S57WO JN65
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
10m 
UTC    dB Audio  Message
152045  -6  617  W4PKU F1TXI IN96 (x3)
141615 -12 1140  W4PKU F4LWD JN03
140645 -22 1741  W4PKU G4TTQ JO01 (x2)

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.

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