JA4DFJ — FT8 station from Japan

Japan Grid: ?

Amateur radio station JA4DFJ operating from Japan. 6 FT8 spots received at SO8OO WebSDR, active on 20m, 10m, over 5 days, best SNR +4 dB. Heard between 2026-05-22 and 2026-07-25.

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

Overview

Total spots

CQ calls

Days active

-8 dB

Avg SNR

Bands

20m 10m

First seen: 2026-05-22
Last seen: 2026-07-25 06:54 UTC

Frequent QSO partners observed at SO8OO

Stations JA4DFJ worked most often, as logged from our receiver:

ON3NR · Belgium

Activity Heatmap

Location

QSO Logbook (as observed from SO8OO)

Format: our rx / partner reports

Time	Band	JA4DFJ	Partner	Partner SNR	Msgs
05-22 12:04	20m	-2 / -	RA1QEA	- / -	2	Partial

Station Log

20m

UTC    dB  Freq  Message
120415  -4  953  JA4DFJ RA1QEA LO19 (x2)
120145  +4 1970  JA4DFJ UE26RUS -05
003800 -14 2492  JA4DFJ ON3NR RR73
085430 -20 1720  JA4DFJ EX9A -15

10m

UTC    dB  Freq  Message
095130 -15  430  JA4DFJ 5H1KB -02