4X1PF — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Israel Most frequent locator attributed to this token: KM71

Receiver-side FT8 activity involving 4X1PF, decoded by SO8OO in southeastern Poland. 115 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 13 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-03.

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 115 FT8 messages attributed to 4X1PF as the transmitting token by decoded message structure across 13 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (68%), followed by 40 m (21%) and 10 m (11%). Most decodes (98%) fell within the six-hour window 13:00-19:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (67%); the estimated median was -4 dB.

Overview

115
Messages attributed
13
UTC dates decoded
19
Active 15-min windows
-4 dB
Estimated median S/N

Bands

40m · 24 20m · 78 10m · 13
First attributed message: 2026-06-06
Last attributed message: 2026-09-03 17:00 UTC

Observed FT8 message patterns

Attributed sample
115 messages
Active dates
13 UTC dates
Estimated median S/N
-4 dB
Estimated 10th-90th percentile
-13 to +14 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 38, strong (≥ -8 dB) 77.

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 4X1PF 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 4X1PF

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
KM71 · 50 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
2,325 km (approx.)
Last such locator decoded
2026-09-03 16:56 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 UTCBand4X1PF S/NCounterpartCounterpart S/NMsgsCapture
09-03 16:57 40m -4 / - YB7AAE - / -19 7 Partial capture
09-03 16:57 40m - / -8 DK7ZT 0 / - 4 Partial capture
09-03 16:56 40m -1 / - SV9QWC - / +2 3 ✓ Closing fragment
09-02 18:10 40m - / +2 DK7ZT -10 / - 3 Partial capture
09-02 18:08 40m -5 / - JH5LCN - / -15 3 ✓ Closing fragment
08-27 16:13 20m - / - UA3IAG -14 / - 2 Partial capture
08-27 16:12 20m -12 / - SP6FME - / -11 2 ✓ Closing fragment
08-27 16:10 20m -10 / - IZ1JIZ - / -10 2 ✓ Closing fragment
08-27 16:08 20m -8 / - DK3XU - / -17 2 ✓ Closing fragment
08-27 16:07 20m -10 / - EA3ACA -4 / -14 4 ✓ Closing observed
08-27 16:04 20m -10 / - DL3MIB -17 / +5 3 ✓ Closing observed
08-27 16:03 20m -4 / - LZ3TB - / -9 2 ✓ Closing fragment
08-27 16:00 20m -2 / - Z21ML - / - 5 Partial capture
08-25 16:47 20m +17 / - SV1MOZ -2 / +4 4 ✓ Closing observed
08-25 16:46 20m +15 / -7 YB7FII -23 / - 4 Partial capture
08-25 16:45 20m - / - R8LCA -11 / - 4 Partial capture
08-25 16:44 20m +13 / - DH1KLF - / -14 3 ✓ Closing fragment
08-25 16:42 20m +17 / - SP6AXW - / 0 2 ✓ Closing fragment
08-25 16:39 20m +11 / +7 5Z4VJ -8 / -7 5 ✓ Full exchange observed
08-25 16:38 20m +13 / -9 G8IXM -13 / -25 11 ✓ Full exchange observed
08-25 16:35 20m +11 / - FR5FK -22 / -12 8 ✓ Closing observed
08-21 17:28 20m +10 / - XU7O - / -23 5 Partial capture
08-21 07:39 20m -2 / - VK4FFF - / - 2 Partial capture
08-19 13:42 10m -13 / - EZ6OJN - / - 6 Partial capture
08-19 13:35 10m -11 / - HS0ZGV - / -10 5 ✓ Closing fragment
08-08 15:48 10m - / - F5RRS -18 / - 2 Partial capture
08-05 14:18 20m -6 / - BI2QFV - / - 2 Partial capture
08-05 14:17 20m - / - F5MXH -4 / - 2 Partial capture
08-05 14:14 20m -10 / +9 GM3DRA -16 / - 3 ✓ Closing observed
08-05 14:11 20m -5 / - OZ7DR - / -12 4 Partial capture
08-05 14:08 20m - / - EA3HMM -6 / - 3 Partial capture
08-05 14:04 20m -12 / - BD4UJ - / -25 3 ✓ Closing fragment
07-22 16:27 10m - / - LZ2EW -14 / - 2 Partial capture
07-22 16:20 10m - / -22 PD0GKB -18 / - 15 ✓ Closing fragment
07-18 16:12 20m 0 / - OY1R -21 / -14 3 ✓ Closing observed
07-18 16:08 20m - / - SP6FME +4 / - 3 Partial capture
07-18 16:07 20m +2 / - XV9T - / -4 3 ✓ Closing fragment
07-14 17:57 20m -2 / - NL8F - / - 2 Partial capture
07-14 17:56 20m +2 / - JH5AVM - / -12 2 Partial capture
07-10 18:06 40m - / - 9A4ZM -3 / - 3 Partial capture
07-10 18:04 40m -11 / - R3LDK -10 / -7 2 Partial capture
07-10 18:01 40m -12 / - VJ6X - / -21 3 ✓ Closing fragment
07-10 17:45 40m -11 / - VJ6X - / - 5 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
165600  -3  833  SV9QWC 4X1PF KM71 (x3)
165715 +10  833  4X1PF US2YW KN28
165715  -3 1905  4X1PF DK7ZT -08
165730  -7  833  YB7AAE 4X1PF -19
165745  -2 1905  4X1PF DK7ZT -08
165800  -9  834  YB7AAE 4X1PF -19
165815  +6 1905  4X1PF DK7ZT -08
165830  -3  834  YB7AAE 4X1PF -19
165845  +1 1905  4X1PF DK7ZT -08
165900  -2  833  YB7AAE 4X1PF -19 (x4)
20m 
UTC    dB Audio  Message
160530 -14  871  DL3MIB 4X1PF +05 (x2)
160630 -13  871  IU8JLX 4X1PF R-01
160715  -5 1003  4X1PF EA3ACA JN01
160730 -11  871  EA3ACA 4X1PF -14 (x2)
160815  -3 1003  4X1PF EA3ACA 73
160830  -6  871  DK3XU 4X1PF R-17 (x2)
161030  -7  871  IZ1JIZ 4X1PF -10 (x2)
161200 -13  871  SP6FME 4X1PF -11 (x2)
161315 -12  942  4X1PF UA3IAG KO77 (x2)
10m 
UTC    dB Audio  Message
154800 -18 1880  4X1PF PZ5RA RR73
154800 -19 2007  4X1PF F5RRS JN36 (x2)
133545  -9  889  HS0ZGV 4X1PF KM71 (x5)
134015 -13  888  CX3DMP 4X1PF 73
134200 -12  888  EZ6OJN 4X1PF KM71 (x6)

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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