JA4FDZ — FT8 station from Japan

Japan Grid: ?

Amateur radio station JA4FDZ operating from Japan. 451 FT8 spots received at SO8OO WebSDR, 19 CQ calls, active on 40m, 20m, over 42 days, best SNR +23 dB. Heard between 2026-06-01 and 2026-07-24.

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

Overview

451
Total spots
19
CQ calls
42
Days active
-6 dB
Avg SNR

Bands

20m 40m
First seen: 2026-06-01
Last seen: 2026-07-24 18:19 UTC

Frequent QSO partners observed at SO8OO

Stations JA4FDZ worked most often, as logged from our receiver:

Activity Heatmap

Location

QSO Logbook (as observed from SO8OO)

Format: our rx / partner reports

TimeBandJA4FDZPartnerPartner SNRMsgs
07-24 20:18 40m -11 / - R3YAU - / -14 2 Partial
07-23 20:40 40m -9 / - I6IAY - / -17 6 ✓ Confirmed
07-23 20:33 40m +1 / - LZ1GC - / - 3 ✓ Confirmed
07-23 20:28 40m -15 / - IU7UTX - / +7 4 Partial
07-23 20:13 40m +8 / - DL1RWN - / -20 2 ✓ Confirmed
07-23 19:41 20m -11 / - EA5JYL - / - 3 Partial
07-22 20:56 40m +3 / - UT6HN - / -9 2 Partial
07-22 20:43 40m -16 / - YO9HP - / -6 3 ✓ Confirmed
07-22 20:37 40m -10 / - DL5EBS - / - 2 Partial
07-22 20:26 40m -12 / - CT1FJO - / -12 2 ✓ Confirmed
07-22 20:24 40m -7 / - R3ZBR - / -11 3 ✓ Confirmed
07-22 20:21 40m -14 / - IK5ZPV - / -12 2 ✓ Confirmed
07-22 20:13 40m +1 / - DL6MRS - / -19 4 ✓ Confirmed
07-22 20:01 40m +2 / - SP9ENV - / -13 2 ✓ Confirmed
07-20 20:40 40m -10 / - YT1MP - / -6 4 ✓ Confirmed
07-20 20:36 40m -9 / - E73X - / -25 4 ✓ Confirmed
07-20 20:25 40m -4 / - IK4LZH - / - 4 Partial
07-20 20:21 40m -2 / - IK4LZH - / - 2 Partial
07-20 20:20 40m -4 / - YO8RQP - / -12 4 ✓ Confirmed
07-20 20:18 40m -8 / - RA1N - / -15 2 ✓ Confirmed
07-20 20:16 40m -18 / - SV1CDN - / -13 2 ✓ Confirmed
07-19 20:42 20m -15 / - <...> - / -14 3 Partial
07-19 20:31 20m -13 / - IK0MIB - / - 4 ✓ Confirmed
07-19 20:25 20m -8 / - RD6OZ - / -15 3 ✓ Confirmed
07-18 20:37 40m -6 / - R6LPF - / -15 3 ✓ Confirmed
07-18 20:29 40m -11 / - S58Z - / -18 2 ✓ Confirmed
07-18 20:19 40m +2 / - SP6CC - / - 2 ✓ Confirmed
07-18 20:16 40m -7 / - SQ3TR - / - 2 Partial
07-18 20:16 40m -7 / - LZ3CB - / +2 3 ✓ Confirmed
07-17 20:19 40m -18 / - SA7CHI - / - 4 Partial
07-16 20:13 40m -5 / - R3XBB - / - 2 ✓ Confirmed
07-15 20:32 20m +1 / - DJ1SL - / -20 4 Partial
07-12 20:11 40m -18 / - SP8MO - / -11 2 Partial
07-12 20:04 40m -15 / - R3DMS - / -9 2 ✓ Confirmed
07-12 20:01 40m -8 / - R7BI - / - 2 Partial
07-11 20:23 40m -16 / - SV4OZF - / -13 2 ✓ Confirmed
07-11 19:55 40m -14 / - TA2BMV - / -3 2 Partial
07-10 20:20 40m -14 / - YO3OBB - / -21 2 ✓ Confirmed
07-10 20:13 40m -12 / - RW3RN - / -10 2 ✓ Confirmed
07-10 20:09 40m -7 / - R7ZS - / -6 5 ✓ Confirmed
07-10 20:06 40m -10 / - UV1IX - / -7 2 ✓ Confirmed
07-10 20:04 40m 0 / - RA1QEA - / - 2 ✓ Confirmed
07-10 19:55 40m -12 / - UT8SQ - / -18 3 ✓ Confirmed
07-10 19:54 40m -16 / - SQ8LE - / -14 2 ✓ Confirmed
07-03 20:08 20m -21 / - IW9FRA - / - 3 Partial
07-02 19:12 20m 0 / - ER1BF - / - 2 Partial
06-30 20:22 20m -4 / - DL1R - / -5 4 ✓ Confirmed
06-30 20:22 20m -7 / - RZ4FWA - / - 2 Partial
06-30 19:53 40m -15 / - RW9QA - / -3 2 ✓ Confirmed
06-28 20:15 20m -13 / - F4MOH - / -24 8 Partial

Station Log

40m 
UTC    dB  Freq  Message
202800 -16  861  JA4FDZ IU7UTX JN80 (x4)
203330  -2  860  JA4FDZ LZ1GC KN22 (x3)
204045 -10 2453  JA4FDZ I6IAY R-17 (x6)
201845 -12 1340  JA4FDZ R3YAU R-14 (x2)
20m 
UTC    dB  Freq  Message
202530 -10  782  JA4FDZ IZ8EYN -20
202530  -8 2496  JA4FDZ RD6OZ KN98 (x3)
203130 -14 1088  JA4FDZ IK0MIB JN62 (x4)
204230 -12 1642  JA4FDZ <...> R-14 (x3)
194145 -14  573  JA4FDZ EA5JYL IM98 (x3)
195030 -16  872  CQ JA4FDZ PM64                        a1

SNR History by Band