JA4LKB — 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: Japan Most frequent locator attributed to this token: PM53

Receiver-side FT8 activity involving JA4LKB, decoded by SO8OO in southeastern Poland. 93 FT8 messages attributed to this token as transmitter, on 160m, 80m, across 13 UTC dates in the available aggregate history. Observed between 2026-08-31 and 2026-11-04.

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 93 FT8 messages attributed to JA4LKB as the transmitting token by decoded message structure across 13 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (95%), followed by 160 m (5%). Most decodes (100%) fell within the six-hour window 17:00-23:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.

Overview

93
Messages attributed
13
UTC dates decoded
23
Active 15-min windows
-10 dB
Estimated median S/N

Bands

160m · 5 80m · 88
First attributed message: 2026-08-31
Last attributed message: 2026-11-04 21:22 UTC

Observed FT8 message patterns

Attributed sample
93 messages
Active dates
13 UTC dates
Estimated median S/N
-10 dB
Estimated 10th-90th percentile
-18 to -5 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 14, moderate (-15 to -9 dB) 50, strong (≥ -8 dB) 29.

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 JA4LKB 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 JA4LKB

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
PM53 · 51 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,425 km (approx.)
Last such locator decoded
2026-11-04 21:22 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 UTCBandJA4LKB S/NCounterpartCounterpart S/NMsgsCapture
11-04 21:23 80m - / -13 LA3BO +16 / - 2 Partial capture
11-04 21:20 80m -17 / - IS0ZOD - / - 2 Partial capture
11-04 21:13 80m - / - SP5OXJ -2 / - 2 Partial capture
11-04 21:07 80m -8 / -17 IS0BQE -2 / - 3 ✓ Closing observed
11-04 21:04 160m - / - IT9KSS -2 / - 3 Partial capture
11-03 21:51 160m - / - 9A5E +2 / - 3 Partial capture
11-03 21:42 160m - / - SP/DL5DBO +4 / - 6 Partial capture
11-03 21:41 160m - / - CT1APN -14 / - 6 Partial capture
11-03 21:41 160m - / +7 SP2GJI +15 / - 7 Partial capture
11-03 21:40 160m - / - IT9VCE -14 / - 8 Partial capture
11-03 21:39 160m - / - OH6NIO -11 / - 7 Partial capture
11-03 21:39 160m - / -13 IU2LVV -9 / - 5 ✓ Closing fragment
11-03 21:39 160m - / - SP6LUV +11 / - 4 Partial capture
11-03 21:38 160m - / - M0HJJ -9 / - 3 Partial capture
11-03 21:38 160m - / -9 F8BON -12 / - 4 Partial capture
11-03 21:37 160m - / - DL8AKI +4 / - 12 Partial capture
11-03 21:36 160m -19 / -13 E73S +8 / -6 3 ✓ Full exchange observed
11-03 21:34 160m - / - DL8AKI +6 / - 3 Partial capture
11-03 21:31 160m -13 / -14 LA1AAA -8 / -21 4 ✓ Full exchange observed
11-03 20:32 80m -10 / - PC40EUDXF - / - 2 Partial capture
11-02 22:18 80m - / - EA3ICF -6 / - 2 Partial capture
11-02 22:16 80m - / - MD0CCE +6 / - 3 Partial capture
11-02 22:16 80m - / -16 OE8SWR +2 / - 3 ✓ Closing fragment
11-02 22:11 80m - / -17 SP8WB +20 / - 4 ✓ Closing fragment
11-02 22:06 80m - / - HA3PP +11 / - 3 Partial capture
11-02 22:04 80m - / - RY7F -9 / - 3 Partial capture
11-02 22:02 80m - / - OK1JR -4 / - 4 Partial capture
11-02 22:01 80m -8 / - CT1CLO -9 / - 2 ✓ Closing observed
11-02 22:00 80m - / - LB7ZG -8 / - 3 Partial capture
11-02 22:00 80m - / -18 R7KKO -12 / - 2 Partial capture
11-02 21:25 80m - / - IK6SBW -8 / - 2 Partial capture
11-02 21:21 80m - / - UF5F -2 / - 4 Partial capture
11-02 21:20 80m - / -19 OM2WQ +17 / - 5 ✓ Closing fragment
11-02 21:18 80m - / -10 OZ0ZZ +12 / - 2 ✓ Closing fragment
11-02 21:16 80m -17 / -9 9A6CC +6 / - 9 Partial capture
10-30 21:51 80m - / -18 TC7ATA -14 / - 2 Partial capture
10-30 21:31 80m - / - IW9FRA -2 / - 8 Partial capture
10-29 20:48 160m - / - OH5NBJ -11 / - 3 Partial capture
10-29 20:37 80m - / - DD3KF +5 / - 2 Partial capture
10-29 20:35 80m - / - DJ1SL +10 / - 2 Partial capture
10-29 20:33 80m -8 / - 2I0WAI - / - 2 Partial capture
10-29 20:32 80m - / - UR4QFP -5 / - 2 Partial capture
10-29 20:26 80m - / - YO4BXX +3 / - 4 Partial capture
10-29 20:26 80m - / -11 G1XOW +7 / - 2 ✓ Closing fragment
10-29 20:25 80m - / - DD3KF +4 / - 2 Partial capture
10-29 20:25 80m - / - G0IUS -6 / - 3 Partial capture
10-29 20:23 80m - / -15 DL6NDN +14 / - 2 ✓ Closing fragment
10-29 20:18 80m - / -7 UR3HC -4 / - 2 Partial capture
10-29 20:17 80m - / -22 DK3WW +13 / - 2 ✓ Closing fragment
10-27 21:41 80m -8 / -13 TA7ARH -10 / -21 4 ✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
221845  -8  845  JA4LKB EA3ICF JN11
203145 -10 1243  RK3AW/P JA4LKB PM53
203215  -9  613  PC40EUDXF JA4LKB PM53 (x2)
220845 -22 2563  9X5KM JA4LKB R-04
210730  -8 2773  IS0BQE JA4LKB PM53
210745  -2 2651  JA4LKB IS0BQE -17 (x2)
211315  +3 2010  JA4LKB SP5OXJ KO02 (x2)
211945 -11  538  G4FHL JA4LKB PM53
212015 -16  539  IS0ZOD JA4LKB PM53 (x2)
212330 +19  343  JA4LKB LA3BO -13 (x2)
160m 
UTC    dB Audio  Message
214345 +13 1110  JA4LKB DL8AKI JO51
214345  -8  236  JA4LKB CT1APN IM59
214415 +21  738  JA4LKB SP2GJI R+07
214415  +4 1110  JA4LKB DL8AKI JO51
214415 -13  237  JA4LKB CT1APN IM59
214445  +2 1952  JA4LKB SP/DL5DBO
214445 -10  236  JA4LKB CT1APN IM59
214515  +3 1952  JA4LKB SP/DL5DBO
214515 -18  236  JA4LKB CT1APN IM59
215145  +1 2133  JA4LKB 9A5E JN75 (x3)
210430  -2 1067  JA4LKB IT9KSS JM68 (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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