KK4RXE — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EM75

Receiver-side FT8 activity involving KK4RXE, decoded by SO8OO in southeastern Poland. 12 FT8 messages attributed to this token as transmitter, on 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-06-16.

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 12 FT8 messages attributed to KK4RXE as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -9 dB; no usual signal pattern is inferred.

Overview

12
Messages attributed
3
UTC dates decoded
5
Active 15-min windows
-9 dB
Estimated median S/N

Bands

20m · 12
First attributed message: 2026-06-07
Last attributed message: 2026-06-16 00:54 UTC

Observed FT8 message patterns

Attributed sample
12 messages
Active dates
3 UTC dates
Estimated median S/N
-9 dB
S/N percentile sample
Too small
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 6, strong (≥ -8 dB) 5.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with KK4RXE in decoded directed-looking exchanges:

Most frequent locator attributed to KK4RXE

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
EM75 · 7 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,113 km (approx.)
Last such locator decoded
2026-06-15 03:15 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 UTCBandKK4RXE S/NCounterpartCounterpart S/NMsgsCapture
09-01 01:24 40m - / -12 W4WHQ -17 / - 2 Partial capture
09-01 00:52 40m - / - G5TV -8 / - 4 Partial capture
08-31 23:58 40m - / - G5TV -10 / - 2 Partial capture
08-31 23:52 40m - / - G5TV -10 / - 3 Partial capture
08-29 23:05 20m - / -7 TT1GD +1 / - 4 ✓ Closing fragment
08-16 01:56 40m - / - R9CS/P -12 / - 2 Partial capture
08-16 00:06 40m - / - PE9JAN 0 / - 2 Partial capture
07-30 04:25 40m - / -16 DL3OCF -10 / - 2 Partial capture
07-30 04:06 40m - / -17 DM8KM +6 / - 4 ✓ Closing fragment
07-27 20:53 10m - / -15 PU2XEE -13 / - 2 Partial capture
07-23 21:37 20m - / - EA4HEW -19 / - 5 Partial capture
07-23 00:17 20m - / -14 EA7GUK -14 / - 2 ✓ Closing fragment
07-22 00:28 40m - / +10 W4DXM -9 / - 3 ✓ Closing fragment
07-21 02:16 40m - / -10 IU8SDA -20 / - 3 Partial capture
07-09 22:08 20m - / -20 EA2DP +5 / - 2 ✓ Closing fragment
07-09 21:52 20m - / -23 AA1BS -14 / - 2 ✓ Closing fragment
07-09 05:27 20m - / - IZ0HDB -17 / - 4 Partial capture
07-09 05:18 20m - / -21 IZ0HDB -22 / - 2 Partial capture
07-03 02:56 80m - / -16 IW0FFK +12 / - 4 ✓ Closing fragment
07-03 02:53 80m - / -11 F1TXI -4 / - 2 ✓ Closing fragment
07-03 00:43 20m - / - W4DXM -11 / - 2 ✓ Closing fragment
07-03 00:38 20m - / -9 E75AA +1 / - 2 ✓ Closing fragment
07-02 23:58 20m - / -5 WB4EHG -6 / - 2 ✓ Closing fragment
07-02 22:07 20m - / -14 TM8WWA +2 / - 2 ✓ Closing fragment
06-30 04:02 40m - / -10 3Z6I +4 / - 2 ✓ Closing fragment
06-30 01:03 20m - / -13 OE8DDX -11 / - 2 ✓ Closing fragment
06-30 00:48 20m - / -12 TM8WWA -13 / - 2 ✓ Closing fragment
06-30 00:36 20m - / -9 EA1AOC -18 / - 2 ✓ Closing fragment
06-30 00:22 20m - / -6 GB2WWA -10 / - 2 ✓ Closing fragment
06-24 01:37 40m - / -7 IQ4JO +10 / - 3 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
235300  -9 2000  KK4RXE G5TV IO93 (x9)
005845  -2 2331  KK4RXE F1PBZ -18
012430 -17  993  KK4RXE W4WHQ -12 (x2)
023715  -1 2000  KK4RXE G5TV IO93 (x2)
033000 -21 1269  KK4RXE NV1U 73
20m 
UTC    dB Audio  Message
220815  +4 3031  KK4RXE EA2DP -20 (x2)
220630  -5 2797  KK4RXE EA7AKE RR73
232800  -3 2925  KK4RXE VP5G -05
001730 -13 2216  KK4RXE EA7GUK -14 (x2)
213745 -18 1324  KK4RXE EA4HEW IN80 (x5)
230500  +4  656  KK4RXE TT1GD -07 (x4)
80m 
UTC    dB Audio  Message
025215 -18  387  KK4RXE KE4EA RR73
025330  -3 1812  KK4RXE F1TXI -11 (x2)
025600 +13  592  KK4RXE IW0FFK -16 (x4)
022645 -17 1499  KK4RXE <...> +13
10m 
UTC    dB Audio  Message
205330 -13  649  KK4RXE PU2XEE -15 (x2)

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