JH4MJO — FT8 station from Japan

Japan Grid: JO20

Amateur radio station JH4MJO operating from Japan (grid square JO20). 36 FT8 spots received at SO8OO WebSDR, active on 80m, 40m, 20m, 10m, over 6 days, best SNR +17 dB. Heard between 2026-04-23 and 2026-05-05.

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

Overview

36
Total spots
0
CQ calls
6
Days active
+3 dB
Avg SNR

Bands

80m 20m 40m 10m
First seen: 2026-04-23
Last seen: 2026-05-05 06:14 UTC

Frequent QSO partners observed at SO8OO

Stations JH4MJO worked most often, as logged from our receiver:

Activity Heatmap

Location

QSO Logbook (as observed from SO8OO)

Format: our rx / partner reports

TimeBandJH4MJOPartnerPartner SNRMsgs
05-05 08:13 20m -13 / - ON8CA - / - 2 Partial
04-28 20:17 40m 0 / - US7UK - / -23 3 ✓ Confirmed
04-28 20:01 40m +13 / - OK1UG - / -15 7 ✓ Confirmed
04-28 19:59 40m +10 / - DL3RL - / -15 2 ✓ Confirmed
04-28 19:53 40m +8 / - SV8DCY - / -14 2 ✓ Confirmed
04-25 07:39 20m -12 / - AX5SFA - / -22 2 ✓ Confirmed
04-23 20:25 80m +14 / - UA4FKT - / -11 2 ✓ Confirmed
04-23 19:23 40m +8 / - OM3PR - / - 5 Partial
04-23 19:22 40m +13 / - 4L3YL - / - 4 ✓ Confirmed
04-23 08:10 20m -8 / - EA7LIC - / -20 2 ✓ Confirmed

Station Log

20m 
UTC    dB  Freq  Message
065330 -22 1232  JH4MJO G4RGK RR73
071900  -6 1833  JH4MJO G4AON -18
081030  -8 1919  JH4MJO EA7LIC -20 (x2)
073945  -9 1000  JH4MJO AX5SFA -22 (x2)
081200  -4  416  JH4MJO F5TA JN07
081330 -13 2142  JH4MJO ON8CA JO20 (x2)
10m 
UTC    dB  Freq  Message
063430  -9 2028  JH4MJO EX7CQ -05
084245 -22 1593  JH4MJO VU2KPH RR73
40m 
UTC    dB  Freq  Message
192630  +4 2622  JH4MJO OM3PR JN87
195330 +10 2494  JH4MJO SV8DCY -14 (x2)
195945  +9 1953  JH4MJO DL3RL -15 (x2)
200115 +14 2810  JH4MJO OK1UG JN89 (x7)
201715  -3 1672  JH4MJO US7UK -23 (x3)
80m 
UTC    dB  Freq  Message
202530 +17  299  JH4MJO UA4FKT R-11 (x2)

SNR History by Band