JA3RSJ — FT8 station from Japan

Japan Grid: ?

Amateur radio station JA3RSJ operating from Japan. 54 FT8 spots received at SO8OO WebSDR, active on 20m, over 10 days, best SNR +13 dB. Heard between 2026-05-16 and 2026-07-25.

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

Overview

54
Total spots
0
CQ calls
10
Days active
-3 dB
Avg SNR

Bands

20m
First seen: 2026-05-16
Last seen: 2026-07-25 18:06 UTC

Frequent QSO partners observed at SO8OO

Stations JA3RSJ worked most often, as logged from our receiver:

Activity Heatmap

Location

QSO Logbook (as observed from SO8OO)

Format: our rx / partner reports

TimeBandJA3RSJPartnerPartner SNRMsgs
07-25 20:05 20m -12 / - EA5ISM - / -11 2 ✓ Confirmed
07-12 20:01 20m -7 / - EA5W - / - 7 ✓ Confirmed
06-27 20:38 20m -8 / - SP4JAW - / -8 2 Partial
06-27 20:31 20m +2 / - IZ2DPX - / -5 2 ✓ Confirmed
06-20 20:33 20m +11 / - F5NBQ - / -12 2 ✓ Confirmed
06-06 20:27 20m +1 / - IK1LZF - / - 4 Partial
06-06 20:22 20m - / -6 HB10GBT -14 / - 2 Partial
06-06 20:20 20m +8 / - ON6AA - / - 5 Partial
06-03 06:35 20m -20 / - TI5RR - / -16 2 ✓ Confirmed
05-30 19:28 20m 0 / - SX1FLY -3 / -21 3 ✓ Verified
05-30 19:18 20m - / -10 SP6FME -6 / - 2 ✓ Confirmed
05-30 19:17 20m - / -15 DH3CW -6 / - 2 ✓ Confirmed
05-23 20:48 20m -1 / - UA6ADU - / -13 2 Partial
05-23 20:41 20m -10 / - HB9DAU -2 / -11 5 Partial
05-23 20:41 20m -7 / - R3MAR - / -15 3 Partial
05-23 20:38 20m -9 / - SV4RRK -12 / -15 4 ✓ Verified
05-23 20:35 20m +1 / - EA4IFI - / -11 8 Partial
05-16 20:54 20m 0 / - EH100AG - / -15 2 Partial
05-16 20:46 20m +8 / - EA5PC - / -9 2 ✓ Confirmed
05-14 22:48 20m - / +1 G3VCQ -12 / - 2 ✓ Confirmed

Station Log

20m 
UTC    dB  Freq  Message
203400 +11  901  JA3RSJ F5NBQ RR73
203130  +1  406  JA3RSJ IZ2DPX -05 (x2)
203800  -5  679  JA3RSJ SP4JAW -08 (x2)
200115  -6  580  JA3RSJ EA5W IM97 (x7)
201730 -10  855  JA3RSJ M8KKH JO01
200500 -11 1566  JA3RSJ EA5ISM -11 (x2)

SNR History by Band