JK4JMO — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan Locator transmitted in a decoded message: PM64

Receiver-side FT8 activity involving JK4JMO, decoded by SO8OO in southeastern Poland. 24 related FT8 messages, observed on 40m, 20m, across 8 UTC dates. Heard between 2026-06-08 and 2026-08-21.

These are automated observations at the SO8OO receiver, not the station's official logbook. Times are UTC. Decoder S/N describes messages received at SO8OO; inferred entity and location data may be inaccurate for portable, remote or special-event operation.

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee

Overview

24
Related messages
0
CQ messages
8
UTC dates heard
+4 dB
Mean decoder S/N

Bands

40m 20m
First seen: 2026-06-08
Last seen: 2026-08-21 18:47 UTC

Frequent QSO partners observed at SO8OO

Stations JK4JMO worked most often, as logged from our receiver:

Activity Heatmap

Locator transmitted by JK4JMO

Approximate centre of PM64, decoded 2026-06-19 21:29 UTC. A transmitted locator is not proof of the operator's permanent location.

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 UTCBandJK4JMO S/NCounterpartCounterpart S/NMsgsCapture
08-21 20:45 40m - / -25 DF8AA +4 / - 4 ✓ Closing fragment
08-21 20:43 40m - / -25 GW8DX +8 / - 2 ✓ Closing fragment
08-21 20:41 40m - / -14 ON4IQ +13 / - 3 ✓ Closing fragment
07-20 20:28 40m - / -18 YO8RQP -2 / - 2 ✓ Closing fragment
07-20 20:25 40m - / -13 OE3PBS -6 / - 2 ✓ Closing fragment
07-20 20:25 40m - / - YO8RQP 0 / - 2 Partial capture
06-26 20:27 40m - / -16 SV2HTW -1 / - 2 ✓ Closing fragment
06-18 19:32 20m - / -12 IR0RCAG +12 / - 2 Partial capture
06-18 19:31 20m -13 / - <...> - / - 2 Partial capture
06-18 19:28 20m -12 / - XI2GIQ/R - / - 3 Partial capture
06-10 22:03 20m - / -12 IU4PSV +4 / - 2 ✓ Closing fragment
06-08 21:27 20m -12 / - BD7KWU - / -8 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
202515  -2 2742  JK4JMO YO8RQP KN37
202515  -8 1933  JK4JMO OE3PBS -13
202545  +1 2742  JK4JMO YO8RQP KN37
202545  -3 1933  JK4JMO OE3PBS RR73
202845  -2 2743  JK4JMO YO8RQP R-18 (x2)
204130 +11 2106  JK4JMO ON4IQ JO20 (x3)
204300 +10 2875  JK4JMO GW8DX -25 (x2)
204530 +10 2667  JK4JMO DF8AA JO60 (x4)
20m 
UTC    dB Audio  Message
212730 -11 3033  BD7KWU JK4JMO 73
220315  +6 2967  JK4JMO IU4PSV -12 (x2)
213800 -11 2785  <...> JK4JMO PM64
192830 -11  331  XI2GIQ/R JK4JMO PM64 (x3)
193100 -12 2730  <...> JK4JMO PM64 (x2)
193215 +15 1293  JK4JMO IR0RCAG -12 (x2)
204015 -11 2940  A92AE JK4JMO PM64 (x3)
231430 +16 2891  JK4JMO RR73; RW9MZ <...> +00

Decoder S/N history by band

Daily averages across messages associated with this profile as decoded at SO8OO.