JA4WLF — FT8 station from Japan

Japan Grid: ?

Amateur radio station JA4WLF operating from Japan. 289 FT8 spots received at SO8OO WebSDR, 35 CQ calls, active on 20m, 10m, over 34 days, best SNR +21 dB. Heard between 2026-04-24 and 2026-07-16.

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

Overview

289
Total spots
35
CQ calls
34
Days active
-3 dB
Avg SNR

Bands

20m 10m
First seen: 2026-04-24
Last seen: 2026-07-16 19:13 UTC

Frequent QSO partners observed at SO8OO

Stations JA4WLF worked most often, as logged from our receiver:

Activity Heatmap

Location

QSO Logbook (as observed from SO8OO)

Format: our rx / partner reports

TimeBandJA4WLFPartnerPartner SNRMsgs
07-16 21:03 20m -8 / - F5PBG - / - 4 Partial
07-16 21:01 20m -8 / - F5NNN - / -15 5 ✓ Confirmed
07-16 20:33 20m +2 / - IS0AEL - / +4 2 ✓ Confirmed
07-16 20:17 20m -17 / - EA4BU - / -20 5 Partial
06-23 20:44 20m +6 / - M0DHO - / - 2 ✓ Confirmed
06-17 19:51 20m - / - CT1BFP -9 / - 6 Partial
06-17 19:46 20m - / - SP2HYO -9 / - 2 ✓ Confirmed
06-17 19:42 20m - / -19 UR3COE -10 / - 2 Partial
06-17 19:33 20m -14 / - CT1FIU - / - 2 Partial
06-17 19:33 20m - / - F5SFT -14 / - 2 Partial
06-17 19:29 20m -1 / - 9A5AZK - / - 2 Partial
06-17 19:26 20m - / -15 SP9NVY -13 / - 3 ✓ Confirmed
06-17 19:22 20m - / -8 SM7HPK -10 / - 2 Partial
06-17 19:17 20m -6 / - DJ0MAB - / - 3 Partial
06-17 19:17 20m -17 / -9 ON1AEY -10 / - 12 ✓ Verified
06-17 19:12 20m - / - F5SFT -10 / - 4 Partial
06-17 19:07 20m - / -23 IS0YHV -8 / - 2 Partial
06-17 19:06 20m - / -12 DL7COC -8 / - 2 ✓ Confirmed
06-17 19:04 20m +3 / -10 RV9WJP -10 / -3 7 ✓ Complete
06-17 19:00 20m -15 / - UT5MD -10 / - 2 ✓ Verified
06-16 18:54 20m - / -15 DK8RE -9 / - 3 ✓ Confirmed
06-16 18:51 20m -10 / - YB5SD -12 / -16 2 ✓ Verified
06-16 18:47 20m +11 / -20 SV1MOZ -12 / -12 8 Partial
06-16 18:44 20m - / -15 UR5XEJ -8 / - 4 ✓ Confirmed
06-16 18:41 20m - / - PD0RCQ -8 / - 2 Partial
06-16 18:40 20m - / -12 SM3MLX -6 / - 2 ✓ Confirmed
06-16 18:32 20m - / -6 OM0RX -7 / - 2 ✓ Confirmed
06-16 18:31 20m - / -16 SM5MRW -7 / - 2 ✓ Confirmed
06-16 18:30 20m - / -3 BI1GHZ -7 / - 2 ✓ Confirmed
06-16 18:26 20m - / -16 IZ3NVR -4 / - 3 ✓ Confirmed
06-16 18:24 20m -9 / -11 R9FF -6 / - 3 ✓ Verified
06-16 18:23 20m - / -7 R5DT -5 / - 2 ✓ Confirmed
06-16 06:39 20m -16 / - KF9UG - / - 2 Partial
06-15 21:39 20m -2 / - RA4FUT - / -15 3 ✓ Confirmed
06-15 20:54 20m -8 / - HB9VAA - / -9 6 Partial
06-15 08:48 20m 0 / - TF5B - / -9 2 ✓ Confirmed
06-10 20:27 20m - / -12 KJ4KFJ -23 / - 3 ✓ Confirmed
06-10 20:18 20m -3 / - DL6AZ - / - 2 Partial
06-10 20:17 20m - / - KJ4KFJ -16 / - 2 Partial
06-10 20:14 20m - / -16 K7L -12 / - 2 ✓ Confirmed
06-10 19:23 20m 0 / - DL8HXP - / -12 8 ✓ Confirmed
06-08 20:37 20m -10 / -18 SV4RRK -8 / -10 3 ✓ Complete
06-08 20:35 20m +1 / - R7KEA - / -16 2 ✓ Confirmed
06-08 20:14 20m -1 / -6 EA5RJ -6 / -11 6 ✓ Complete
06-08 20:07 20m +10 / -1 OK7TB -13 / +7 5 ✓ Complete
06-08 20:06 20m -4 / -12 4Z5MY -13 / - 3 ✓ Verified
06-07 20:13 20m +5 / - EA3GAT - / -19 3 Partial
06-06 20:34 20m - / -12 OE1HOW -6 / - 2 ✓ Confirmed
06-06 20:30 20m +8 / - IV3JRY - / -9 4 ✓ Confirmed
06-06 20:11 20m +7 / - R3ES - / -7 3 ✓ Confirmed

Station Log

20m 
UTC    dB  Freq  Message
201845 -17 1440  JA4WLF EA4BU R-20 (x2)
203115 -13  982  JA4WLF F5PBG IN78
203345  +3 1025  JA4WLF IS0AEL +04 (x2)
210100  -9 1140  JA4WLF F5NNN IN94 (x4)
210300 -10 1191  JA4WLF F5PBG IN78
210300  -5 1140  JA4WLF F5NNN 73
210330  -8 1191  JA4WLF F5PBG IN78 (x3)
211345  -7 1251  JA4WLF EB5DFU -19
10m 
UTC    dB  Freq  Message
130415 -11 2763  JA4WLF 9J2FI +00 (x2)

SNR History by Band