K4JJL — 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: EL96

Receiver-side FT8 activity involving K4JJL, decoded by SO8OO in southeastern Poland. 72 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 9 UTC dates in the available aggregate history. Observed between 2026-08-26 and 2026-10-04.

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 72 FT8 messages attributed to K4JJL as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (90%), followed by 20 m (10%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (83%); the estimated median was -19 dB.

Overview

72
Messages attributed
9
UTC dates decoded
19
Active 15-min windows
-19 dB
Estimated median S/N

Bands

40m · 65 20m · 7
First attributed message: 2026-08-26
Last attributed message: 2026-10-04 23:52 UTC

Observed FT8 message patterns

Attributed sample
72 messages
Active dates
9 UTC dates
Estimated median S/N
-19 dB
Estimated 10th-90th percentile
-22 to -15 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 60, moderate (-15 to -9 dB) 12, strong (≥ -8 dB) 0.

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 K4JJL 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 K4JJL

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
EL96 · 9 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,634 km (approx.)
Last such locator decoded
2026-09-07 00:08 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 UTCBandK4JJL S/NCounterpartCounterpart S/NMsgsCapture
11-05 04:15 80m - / -21 W1LE +2 / - 3 ✓ Closing fragment
10-24 04:54 40m - / -13 IK0QDM -6 / - 2 ✓ Closing fragment
10-24 04:22 40m - / -22 UA3GDJ +4 / - 4 ✓ Closing fragment
10-24 04:21 40m - / -15 EA3AKY -8 / - 2 ✓ Closing fragment
10-24 02:46 40m - / -14 G1LQT -6 / - 2 ✓ Closing fragment
10-23 02:52 80m - / -16 P4/WE9V -15 / - 2 Partial capture
10-20 04:56 40m - / -14 IK4DCW +11 / - 2 ✓ Closing fragment
10-20 04:15 40m - / -20 EB3DBR +2 / - 2 ✓ Closing fragment
10-19 05:37 40m - / - OE9DAI +3 / - 8 Partial capture
10-16 05:28 40m - / -15 EA5WU -7 / - 3 ✓ Closing fragment
10-16 04:48 40m - / -15 G4RRA -2 / - 2 ✓ Closing fragment
10-16 03:00 40m - / -25 EA3JW -12 / - 3 ✓ Closing fragment
10-13 05:44 40m - / -12 F6HRP -3 / - 3 Partial capture
10-13 05:36 40m - / -16 F6DZU -4 / - 2 ✓ Closing fragment
10-12 03:46 80m - / -15 NY3C -24 / - 2 ✓ Closing fragment
10-09 00:28 40m - / -6 CT3IQ -14 / - 3 Partial capture
10-08 23:59 40m - / +10 KE1IH -15 / - 2 ✓ Closing fragment
10-08 23:42 40m - / - EA4PS -13 / - 2 ✓ Closing fragment
10-08 01:23 40m - / -8 HI3A -12 / - 2 ✓ Closing fragment
10-07 23:47 40m - / -8 5B4AMM +14 / - 2 ✓ Closing fragment
10-07 23:20 40m - / - EA1HFV -10 / - 9 Partial capture
10-05 00:07 40m - / -9 EA4HPY -4 / - 2 ✓ Closing fragment
10-05 00:04 40m - / +6 N1NK -12 / - 2 ✓ Closing fragment
10-05 00:02 40m - / -5 K2CBI -8 / - 2 ✓ Closing fragment
10-04 23:50 40m -21 / -7 KP2B -6 / -5 3 ✓ Full exchange observed
10-04 23:47 40m -22 / - WP4RBS -17 / -12 2 ✓ Closing observed
10-04 23:44 40m - / -2 WE0D -22 / - 2 ✓ Closing fragment
10-04 23:23 40m - / -8 IZ0MIT -6 / - 2 ✓ Closing fragment
10-04 22:57 40m - / -10 N2LQH 0 / - 2 ✓ Closing fragment
10-04 22:35 40m - / -16 M0MLS -4 / - 2 ✓ Closing fragment
10-03 05:19 40m - / -14 F1PWS -8 / - 2 ✓ Closing fragment
10-03 05:05 40m - / -13 OH7MA +4 / - 2 ✓ Closing fragment
10-03 04:51 40m - / -9 DG5AAG +2 / - 4 ✓ Closing fragment
10-03 04:49 40m - / - PE1NMM -15 / - 2 ✓ Closing fragment
10-03 04:48 40m - / -8 GJ0KYZ -4 / - 2 ✓ Closing fragment
10-03 04:46 40m - / +5 LX1TI +8 / - 2 ✓ Closing fragment
10-03 04:33 40m - / -20 PE1NMM -11 / - 4 Partial capture
10-03 04:27 40m - / -9 IU1TLG -1 / - 6 ✓ Closing fragment
10-03 04:23 40m - / -11 F4HQL -8 / - 4 ✓ Closing fragment
10-03 04:16 40m - / - SV2CWV -10 / - 2 Partial capture
10-03 04:15 40m - / - DH5BM -18 / - 2 Partial capture
10-03 04:13 40m - / -3 IK2JYT -20 / - 2 Partial capture
10-03 04:00 40m - / -12 YO9HP +13 / - 2 ✓ Closing fragment
10-03 03:59 40m - / -19 RZ1OA -10 / - 3 ✓ Closing fragment
10-03 03:11 40m - / -12 EA1HVS -16 / - 2 ✓ Closing fragment
10-03 02:57 40m - / - PA3EMN +4 / - 2 Partial capture
10-03 02:51 40m - / - F4BYA +13 / - 8 Partial capture
10-03 02:49 40m - / - ON3ONX -18 / - 7 Partial capture
10-03 02:38 40m - / - EA1HVS -18 / - 2 Partial capture
10-03 02:24 40m - / - LZ2PAJ -12 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
063900 -21 1854  K4JJL EA1DR -20
003715 -11 1246  K4JJL W3IP 73
004230 -24  984  K4JJL NV1U R-08
025300 -12  588  K4JJL K1VI R-22
034630 -24 1065  K4JJL NY3C R-15 (x2)
025230 -15  753  K4JJL P4/WE9V -16 (x2)
033330 -23  957  K4JJL W6NWS RR73
021815  -9  469  K4JJL W8GNM -24
035045 +14 1790  K4JJL UX5UO KO50
021645 -24 2194  K4JJL KN4PAH -23
041515  +0 2834  K4JJL W1LE FN41 (x3)
40m 
UTC    dB Audio  Message
045700 +12 2586  K4JJL IK4DCW RR73
052245  -9 1225  K4JJL ON8WR -19
002400 -11 2542  K4JJL F1PBZ RR73
024645  -7 1978  K4JJL G1LQT -14 (x2)
031845 -21 1347  K4JJL EA4IPN RR73
040315 -23 2037  K4JJL SV1AIN KM17
042100  -7 1743  K4JJL EA3AKY -15 (x2)
042230  +2 1103  K4JJL UA3GDJ KO92 (x4)
045430  -4 1968  K4JJL IK0QDM -13 (x2)
20m 
UTC    dB Audio  Message
002745 -13 2176  K4JJL OK2CNI R-12 (x2)
001245 -21 2005  5Z4VJ K4JJL RR73
001300 -23 2167  K4JJL 5Z4VJ 73
001715 -22 2008  KP4TNI K4JJL RR73
001800 -24 1854  K4JJL KP4TNI 73
001845 -22 2008  TJ1GD K4JJL -13 (x2)
002100 -21 2009  KE9AEY K4JJL -11 (x2)
002430 -23 2010  WU8T K4JJL -12
211815  -2 1935  K4JJL LX7I R-05
213815  -3 3031  K4JJL NU1T 73

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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