JF4UMY — FT8 station from Japan

Japan Grid: ?

Amateur radio station JF4UMY operating from Japan. 22 FT8 spots received at SO8OO WebSDR, active on 40m, over 5 days, best SNR +23 dB. Heard between 2026-04-23 and 2026-05-14.

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

Overview

Total spots

CQ calls

Days active

+7 dB

Avg SNR

Bands

40m

First seen: 2026-04-23
Last seen: 2026-05-14 16:34 UTC

Frequent QSO partners observed at SO8OO

Stations JF4UMY worked most often, as logged from our receiver:

UR5EDX · Ukraine UR6QA · Ukraine RJ6B · European Russia

Activity Heatmap

Location

QSO Logbook (as observed from SO8OO)

Format: our rx / partner reports

Time	Band	JF4UMY	Partner	Partner SNR	Msgs
05-06 19:24	40m	+4 / -	RJ6B	- / -	3	✓ Confirmed
05-03 18:34	40m	+4 / -	UR6QA	- / -10	4	✓ Confirmed
04-27 19:55	40m	+14 / -	UR5EDX	- / -12	9	✓ Confirmed

Station Log

40m

UTC    dB  Freq  Message
195630 +14 2112  JF4UMY UR5EDX KN78 (x7)
183415  +7  655  JF4UMY UR6QA KN77 (x4)
192415  +1 2951  JF4UMY RJ6B KN95 (x3)
183400 -24 1475  JF4UMY UN8DSW -18