KK4JO — 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: EM71

Receiver-side FT8 activity involving KK4JO, decoded by SO8OO in southeastern Poland. 31 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 10 UTC dates in the available aggregate history. Observed between 2026-09-06 and 2026-10-21.

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 31 FT8 messages attributed to KK4JO as the transmitting token by decoded message structure across 10 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (90%), followed by 80 m (10%). Most decodes (100%) fell within the six-hour window 00:00-06:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

31
Messages attributed
10
UTC dates decoded
16
Active 15-min windows
-9 dB
Estimated median S/N

Bands

80m · 3 40m · 28
First attributed message: 2026-09-06
Last attributed message: 2026-10-21 05:03 UTC

Observed FT8 message patterns

Attributed sample
31 messages
Active dates
10 UTC dates
Estimated median S/N
-9 dB
Estimated 10th-90th percentile
-20 to -6 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 13, strong (≥ -8 dB) 12.

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 KK4JO 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 KK4JO

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
EM71 · 12 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,455 km (approx.)
Last such locator decoded
2026-10-21 05:03 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 UTCBandKK4JO S/NCounterpartCounterpart S/NMsgsCapture
10-23 03:36 40m - / - ON8WR -8 / - 2 Partial capture
10-23 03:24 40m - / -15 IZ8XXE -5 / - 2 ✓ Closing fragment
10-23 03:04 40m - / -5 IT9VCE -2 / - 4 ✓ Closing fragment
10-21 05:10 80m - / +2 F6DZU +10 / - 2 Partial capture
10-21 05:05 80m - / - IK4DCW +4 / - 3 Partial capture
10-21 05:04 80m - / - G0BLB +5 / - 2 Partial capture
10-21 05:03 80m -9 / - SX37VER - / -16 2 Partial capture
10-18 04:33 40m - / - YO6LM +8 / - 2 Partial capture
10-18 04:32 40m - / - DF8RU 0 / - 2 ✓ Closing fragment
10-18 04:24 40m - / -6 M0UTD +12 / - 2 ✓ Closing fragment
10-18 04:20 40m - / - ER3CT -8 / - 2 Partial capture
10-18 04:14 40m - / - R7DX +15 / - 3 Partial capture
10-18 04:06 40m - / -1 G8KHF -2 / - 4 ✓ Closing fragment
10-08 05:37 40m - / - PD1AC -17 / - 3 Partial capture
10-08 05:36 40m - / - G0BLB -2 / - 2 Partial capture
10-08 05:36 40m - / - PC2J +5 / - 3 Partial capture
10-08 05:36 40m - / - PD1RO -2 / - 3 Partial capture
10-08 02:09 40m - / -14 F5MOO -7 / - 2 ✓ Closing fragment
10-07 04:12 80m - / - F4IDN -11 / - 2 Partial capture
10-07 04:11 80m - / - DO5OT +11 / - 7 Partial capture
10-07 04:11 80m - / - HA7TM +3 / - 3 Partial capture
10-07 04:11 80m - / - ON7GB +8 / - 5 Partial capture
10-07 04:10 80m - / - F5RAV -3 / - 4 Partial capture
10-07 04:10 80m - / -18 YO8RAW +2 / - 3 Partial capture
10-07 04:09 80m - / - F6ECI +7 / - 5 Partial capture
10-07 04:09 80m - / -19 YO4NF +6 / - 2 Partial capture
10-07 04:03 80m - / - DO5OT +15 / - 8 Partial capture
10-07 04:02 80m - / - EA1IOK -4 / - 5 Partial capture
10-07 03:40 40m - / - R7DX +5 / - 4 Partial capture
10-07 03:18 80m - / - ON7GB +6 / - 4 Partial capture
10-07 03:17 80m - / -18 EC3A -6 / - 2 Partial capture
10-07 03:17 80m - / - F5RAV -3 / - 3 Partial capture
10-07 03:17 80m - / - EA1IOK -6 / - 5 Partial capture
10-07 02:55 80m - / - DL4ME +20 / - 3 Partial capture
10-07 02:37 80m - / - EA1IOK -7 / - 5 Partial capture
10-05 01:01 40m - / - UX1VT +1 / - 3 Partial capture
10-02 02:17 40m - / -2 DJ9BX -18 / - 2 ✓ Closing fragment
10-02 01:28 40m - / - UB6OFG +13 / - 3 Partial capture
10-02 01:03 40m - / -9 G3TKT +4 / - 2 Partial capture
10-02 01:03 40m - / - IU8RFW -8 / - 3 Partial capture
10-02 00:37 40m -8 / - HA7JDU -20 / - 2 ✓ Closing observed
10-02 00:19 40m - / 0 ON5VN +3 / - 5 ✓ Closing fragment
10-01 04:03 40m - / -12 IQ4JO 0 / - 2 ✓ Closing fragment
09-30 01:53 40m - / -3 F4EGM +9 / - 3 ✓ Closing fragment
09-30 01:25 40m - / -10 SV2KD +3 / - 6 Partial capture
09-29 02:52 40m - / -22 UA6BGM +4 / - 4 ✓ Closing fragment
09-29 02:43 40m -14 / -12 EI2IXB 0 / - 3 ✓ Closing observed
09-27 07:25 40m - / - F8MRQ -20 / - 2 ✓ Closing fragment
09-25 04:56 40m - / -18 DG1KDD +6 / - 4 ✓ Closing fragment
09-25 04:54 40m - / - F4GAJ -16 / - 3 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
042445 +10 2482  KK4JO M0UTD RR73
042515  -6 2887  KK4JO EB3JT JN01
043200  +0 1536  KK4JO DF8RU +19 (x2)
043300  +9 2789  KK4JO YO6LM KN25 (x2)
030445  +1  347  KK4JO IT9VCE -05 (x4)
032430  -7 2426  KK4JO IZ8XXE -15 (x2)
033630  -5  830  KK4JO ON8WR JO11 (x2)
034500 -22 1884  KK4JO RR73; R1BMY <...> -12
80m 
UTC    dB Audio  Message
041315  -6 1183  KK4JO F5RAV JN09
041315 +14 2553  KK4JO DO5OT JO62
041345  +2 1183  KK4JO F5RAV JN09
041345 +11 2553  KK4JO DO5OT JO62 (x3)
050315  -9 2702  SX37VER KK4JO EM71 (x2)
050430  +4 2221  KK4JO G0BLB IO81
050500  +6 2122  KK4JO IK4DCW JN64
050500  +6 2221  KK4JO G0BLB IO81
050530  +0 2122  KK4JO IK4DCW JN64 (x2)
051045 +11  554  KK4JO F6DZU +02 (x2)
20m 
UTC    dB Audio  Message
071315  -2  541  KK4JO M9KJY -23
035045 +10 2475  KK4JO UT3RS KO60 (x3)
040445 -10  343  KK4JO RA6ZS KN98
040630 -18 1975  KK4JO SV5BYP KM46
040700  -9 1087  KK4JO UA3ZNQ KO81
040700 -10 1975  KK4JO SV5BYP KM46
040730  -9 1088  KK4JO UA3ZNQ KO81
040730 -12 1975  KK4JO SV5BYP R-10 (x3)

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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