4X1SK — 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: KM72

Receiver-side FT8 activity involving 4X1SK, decoded by SO8OO in southeastern Poland. 161 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 16 UTC dates in the available aggregate history. Observed between 2026-06-21 and 2026-10-25.

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 161 FT8 messages attributed to 4X1SK as the transmitting token by decoded message structure across 16 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (48%), followed by 40 m (44%) and 80 m (8%). Most decodes (64%) fell within the six-hour window 22:00-04:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

161
Messages attributed
16
UTC dates decoded
33
Active 15-min windows
-11 dB
Estimated median S/N

Bands

80m · 13 40m · 71 20m · 77
First attributed message: 2026-06-21
Last attributed message: 2026-10-25 03:18 UTC

Observed FT8 message patterns

Attributed sample
161 messages
Active dates
16 UTC dates
Estimated median S/N
-11 dB
Estimated 10th-90th percentile
-18 to -3 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 42, moderate (-15 to -9 dB) 55, strong (≥ -8 dB) 64.

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 4X1SK in decoded directed-looking exchanges:

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 4X1SK

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
KM72 · 94 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
2,224 km (approx.)
Last such locator decoded
2026-10-25 03:18 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 UTCBand4X1SK S/NCounterpartCounterpart S/NMsgsCapture
10-25 03:13 40m -4 / - 7P8GE - / - 2 Partial capture
10-25 03:12 40m - / - F5PBG -2 / - 2 Partial capture
10-25 03:11 40m -7 / - TJ1GD - / -1 2 ✓ Closing fragment
10-24 17:42 80m - / -7 TK4QP -13 / - 2 ✓ Closing fragment
10-18 02:27 40m -8 / - TJ1GD - / -7 4 ✓ Closing fragment
10-18 02:18 40m -9 / - TJ1GD - / - 4 Partial capture
10-18 02:15 40m - / - W4UM -3 / - 2 Partial capture
10-18 02:13 40m -7 / - 7P8GE - / -14 3 ✓ Closing fragment
10-18 02:11 40m -5 / - SX37VER - / -2 3 Partial capture
09-22 19:13 80m -15 / - RI1FJZ - / - 2 Partial capture
08-28 15:45 40m -12 / -6 R7DX +1 / - 4 ✓ Full exchange observed
08-28 15:38 40m -14 / -24 F5RRS -5 / -10 5 ✓ Full exchange observed
08-28 15:37 40m -13 / - BI4IWL - / -14 3 ✓ Closing fragment
08-28 15:35 40m -15 / - YD8NEH - / -1 3 ✓ Closing fragment
08-28 15:32 40m -15 / - BG0HP - / -1 4 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
021845 -10 2116  TJ1GD 4X1SK KM72 (x9)
031230  -2 1198  4X1SK F5PBG IN78
031300 -24 1817  4X1SK RZ4FWA LO23
031300  -3 1198  4X1SK F5PBG IN78
031345  -2 1148  7P8GE 4X1SK KM72 (x3)
80m 
UTC    dB Audio  Message
190830  +8 1473  4X1SK YO3HUI KN34
191315 -16 2411  RI1FJZ 4X1SK KM72 (x2)
191700 +23 2459  4X1SK ES2AJ KO29
174245 -12 1538  4X1SK TK4QP -07 (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.

CW

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

Explore CW reception at SO8OO

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