JO4LUM — FT8 station from Japan

Japan Grid: ?

Amateur radio station JO4LUM operating from Japan. 6 FT8 spots received at SO8OO WebSDR, active on 40m, 10m, over 4 days, best SNR +5 dB. Heard between 2026-04-27 and 2026-07-21.

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

Overview

Total spots

CQ calls

Days active

-11 dB

Avg SNR

Bands

40m 10m

First seen: 2026-04-27
Last seen: 2026-07-21 18:39 UTC

Frequent QSO partners observed at SO8OO

Stations JO4LUM worked most often, as logged from our receiver:

RD6OZ · European Russia RJ6B · European Russia

Location

QSO Logbook (as observed from SO8OO)

Format: our rx / partner reports

Time	Band	JO4LUM	Partner	Partner SNR	Msgs
07-21 20:38	40m	-14 / -	RD6OZ	- / -19	2	✓ Confirmed
06-20 20:41	40m	+2 / -	RJ6B	- / -18	2	✓ Confirmed

Station Log

40m

UTC    dB  Freq  Message
204145  +5 2831  JO4LUM RJ6B R-18 (x2)
203830 -13 1926  JO4LUM RD6OZ R-19 (x2)

10m

UTC    dB  Freq  Message
090330 -20 1984  JO4LUM YB2SLF -18