F4JFZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: JN03

Receiver-side FT8 activity involving F4JFZ, decoded by SO8OO in southeastern Poland. 199 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 15 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-08-29.

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 199 FT8 messages attributed to F4JFZ as the transmitting token by decoded message structure across 15 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (83%), followed by 40 m (17%) and 10 m (1%). Several six-hour UTC windows tied for the largest share (56%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -7 dB.

Overview

199
Messages attributed
15
UTC dates decoded
35
Active 15-min windows
-7 dB
Estimated median S/N

Bands

40m · 33 20m · 165 10m · 1
First attributed message: 2026-06-09
Last attributed message: 2026-08-29 19:57 UTC

Observed FT8 message patterns

Attributed sample
199 messages
Active dates
15 UTC dates
Estimated median S/N
-7 dB
Estimated 10th-90th percentile
-18 to +2 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 36, moderate (-15 to -9 dB) 54, strong (≥ -8 dB) 109.

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 F4JFZ 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 F4JFZ

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
JN03 · 167 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,732 km (approx.)
Last such locator decoded
2026-08-29 19:48 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 UTCBandF4JFZ S/NCounterpartCounterpart S/NMsgsCapture
08-29 19:39 20m -10 / - WC2P - / - 2 Partial capture
08-29 19:37 20m 0 / - F5PBG - / - 2 ✓ Closing fragment
08-29 19:33 20m -6 / - K0MDS - / -12 5 ✓ Closing fragment
08-29 19:08 20m +8 / - W8PP - / -18 8 Partial capture
08-29 18:39 20m +2 / - 9P8JUG/P - / - 2 Partial capture
08-27 07:14 40m - / +6 F5ADE -12 / - 2 ✓ Closing fragment
08-27 07:03 40m - / - DH1PS -12 / - 2 Partial capture
08-27 06:51 40m - / - DH1PS -8 / - 2 Partial capture
08-27 05:50 40m - / - F5NNN -15 / - 4 Partial capture
08-27 05:49 40m - / - YO6LM +15 / - 3 Partial capture
08-27 05:34 40m -22 / - N4RLS - / - 4 Partial capture
08-27 05:26 40m -18 / - KE9END - / -17 2 ✓ Closing fragment
08-27 05:23 40m - / - DJ0MAB -5 / - 3 Partial capture
08-27 05:21 40m -17 / - KB3Z - / - 3 Partial capture
08-20 06:30 40m - / - EA5HM -14 / - 4 Partial capture
08-20 06:22 40m -11 / - KJ5PTH - / - 3 Partial capture
08-20 06:12 40m -14 / - KJ5PTH - / - 7 Partial capture
08-03 09:21 20m -14 / - EP2AES - / - 7 Partial capture
08-03 09:10 20m -23 / - 6Y5EH - / - 3 Partial capture
07-20 23:53 20m - / -9 W4PSK 0 / - 2 ✓ Closing fragment
07-20 23:39 20m - / -3 W4PSK 0 / - 2 Partial capture
07-17 23:03 20m - / -7 W4DXM -16 / - 2 Partial capture
07-08 21:52 40m -18 / -7 BD8ENU 0 / - 6 Partial capture
07-07 21:38 20m -6 / - 7Q5MP - / - 8 Partial capture
07-04 00:49 20m - / - V31DL -14 / - 2 Partial capture
06-22 22:16 20m 0 / - WD4OOZ - / -3 10 ✓ Closing fragment
06-22 22:08 20m -6 / - W1RQ - / - 11 Partial capture
06-22 22:00 20m -10 / - K2PS - / - 11 Partial capture

Recent FT8 messages decoded at SO8OO

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

20m 
UTC    dB Audio  Message
191115  +5 2700  W8PP F4JFZ R-18 (x3)
193315  +1 2189  K0MDS F4JFZ JN03 (x5)
193715  +3 1169  F5PBG F4JFZ +13 (x2)
193815  -6 1939  KD8WJB F4JFZ JN03
193915  -7 1569  WC2P F4JFZ JN03 (x2)
194815 -18 1479  N3F F4JFZ JN03
195700 -19 1179  KR4EEH F4JFZ R-13
40m 
UTC    dB Audio  Message
054930 +15 2779  F4JFZ YO6LM KN25 (x2)
055000  -1  602  F4JFZ ON5HE R+06
055030 +15 2779  F4JFZ YO6LM KN25
055030 -16 1001  F4JFZ F5NNN IN94 (x4)
065115  -6 1738  F4JFZ DH1PS JO31 (x4)
071145 -18 2312  F4JFZ F5ADE JN07 (x3)
80m 
UTC    dB Audio  Message
051115 -11 1150  F4JFZ DF40ABF -10
10m 
UTC    dB Audio  Message
210745 -20 1516  <...> F4JFZ JN03

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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