KF4BI — 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: EM81

Receiver-side FT8 activity involving KF4BI, decoded by SO8OO in southeastern Poland. 38 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-09 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 38 FT8 messages attributed to KF4BI as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (61%), followed by 40 m (39%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

38
Messages attributed
4
UTC dates decoded
8
Active 15-min windows
-9 dB
Estimated median S/N

Bands

40m · 15 20m · 23
First attributed message: 2026-06-09
Last attributed message: 2026-09-03 01:08 UTC

Observed FT8 message patterns

Attributed sample
38 messages
Active dates
4 UTC dates
Estimated median S/N
-9 dB
Estimated 10th-90th percentile
-15 to -2 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 3, moderate (-15 to -9 dB) 16, strong (≥ -8 dB) 19.

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 KF4BI in decoded directed-looking exchanges:

Most frequent locator attributed to KF4BI

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
EM81 · 11 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,333 km (approx.)
Last such locator decoded
2026-09-03 01:07 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 UTCBandKF4BI S/NCounterpartCounterpart S/NMsgsCapture
10-28 01:43 160m - / -18 F5NBU +9 / - 2 Partial capture
10-26 01:01 160m - / - F5UKW -9 / - 5 Partial capture
10-26 00:54 160m - / - F5UKW -19 / - 3 Partial capture
10-26 00:49 160m - / - F5UKW -14 / - 3 Partial capture
10-26 00:22 160m - / -24 EI9HQ -9 / - 2 ✓ Closing fragment
09-03 01:07 40m -11 / - NP4EB - / -3 3 ✓ Closing fragment
09-03 01:05 40m -8 / - TN8GD - / -18 2 ✓ Closing fragment
08-23 04:00 20m - / -9 TA2FE +4 / - 2 ✓ Closing fragment
08-23 03:34 20m - / - RK4H +1 / - 2 Partial capture
08-23 03:32 20m - / -14 UA3ZAB +12 / - 4 ✓ Closing fragment
08-23 03:30 20m - / -17 R4AEH -18 / - 3 Partial capture
08-23 03:25 20m - / - UT2AU -11 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

160m 
UTC    dB Audio  Message
002245  -9 1203  KF4BI EI9HQ -24 (x2)
004900 -13 1259  KF4BI F5UKW JN12 (x11)
014345 +10 2197  KF4BI F5NBU -18 (x2)
40m 
UTC    dB Audio  Message
010545  -8  514  TN8GD KF4BI R-18 (x2)
010715  -9  739  NP4EB KF4BI EM81 (x3)
023930 -18 2248  KF4BI EG42SDC +00
20m 
UTC    dB Audio  Message
032630 -12  678  KF4BI UT2AU 73
033000 -15 1666  KF4BI R4AEH LN28 (x3)
033230 +15  663  KF4BI UA3ZAB KO80 (x4)
033400  +5 1075  KF4BI RK4H LO53 (x2)
034100  -5 1883  KF4BI EN35UKR +10
034830  -7  542  KF4BI A93MO RR73 (x2)
040000  +6 1463  KF4BI TA2FE -09 (x2)

CW

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

Explore CW reception at SO8OO

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