JR4GPA — FT8 station from Japan

Japan Grid: IO87

Amateur radio station JR4GPA operating from Japan (grid square IO87). 1,033 FT8 spots received at SO8OO WebSDR, 205 CQ calls, active on 80m, 40m, 20m, 10m, over 40 days, best SNR +30 dB. Heard between 2026-04-24 and 2026-07-21.

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

Overview

1,033
Total spots
205
CQ calls
40
Days active
-3 dB
Avg SNR

Bands

80m 20m 40m 10m
First seen: 2026-04-24
Last seen: 2026-07-21 16:42 UTC

Frequent QSO partners observed at SO8OO

Stations JR4GPA worked most often, as logged from our receiver:

Activity Heatmap

Location

QSO Logbook (as observed from SO8OO)

Format: our rx / partner reports

TimeBandJR4GPAPartnerPartner SNRMsgs
07-21 18:42 20m -4 / - MM8WXA - / - 2 Partial
07-19 17:56 20m -8 / - S58Z - / -2 2 ✓ Confirmed
07-19 17:29 20m +7 / - EA5RO - / - 5 Partial
07-19 17:27 20m -9 / - R6DJR - / -12 2 Partial
07-19 17:27 20m -4 / - RG8G - / -8 2 Partial
07-19 17:26 20m -11 / - DD0AM - / -19 2 ✓ Confirmed
07-19 17:23 20m -10 / - DH1FA - / -17 2 ✓ Confirmed
07-19 17:13 20m -23 / - HB9IJU - / - 2 Partial
07-19 17:08 20m -4 / - RA3P - / - 2 ✓ Confirmed
07-18 20:52 20m -13 / - UA3GU - / -6 3 Partial
07-18 20:42 20m -6 / - DL5SD - / -5 2 ✓ Confirmed
07-18 20:36 20m +7 / - S57ESG - / - 3 Partial
07-18 20:33 20m -5 / - US4EX - / -14 4 Partial
07-18 20:13 20m -16 / - ON3FGC - / - 2 Partial
07-18 20:01 20m - / -12 SV3CNX -12 / - 3 Partial
07-18 19:57 20m +4 / - DL6CGN - / - 2 Partial
07-18 19:52 20m -11 / - IK1EZX - / - 4 Partial
07-18 19:50 20m +15 / - IV3DSG - / - 3 Partial
07-18 19:47 20m -6 / - DL2VAH - / - 2 Partial
07-18 19:47 20m -1 / - DL6CGN - / - 2 Partial
07-18 19:43 20m +7 / - DL5AVJ - / -8 5 ✓ Confirmed
07-18 19:31 20m +2 / - DL5CK - / -10 4 ✓ Confirmed
07-16 19:07 20m -16 / - CS5AIRA - / -12 2 Partial
07-10 19:47 20m -8 / - EA5AYC - / -24 4 Partial
07-10 19:19 20m -5 / - F8BJI - / -16 4 ✓ Confirmed
07-10 19:07 20m -16 / - CT1FIU - / - 2 Partial
07-10 19:06 20m -2 / - UT7UJ - / -19 5 Partial
07-09 18:53 20m -6 / - SV1MOZ - / - 2 Partial
07-09 18:51 20m -1 / - UT4LU - / - 4 Partial
07-08 20:11 20m +14 / - EA5IK - / -4 3 ✓ Confirmed
07-06 17:31 20m +14 / - IV3KZF - / -8 3 ✓ Confirmed
07-05 17:54 20m -8 / - IZ2TKX - / - 2 Partial
07-05 17:51 20m -5 / - DF8TS - / -9 4 ✓ Confirmed
07-05 17:51 20m -14 / - F4HEN - / -10 2 ✓ Confirmed
07-05 17:39 20m -3 / - OP0WWA - / -7 2 ✓ Confirmed
07-05 17:32 20m -10 / - Z61DX - / -3 2 ✓ Confirmed
07-05 17:20 20m -14 / - DF4TC - / -8 3 Partial
07-05 17:15 20m -12 / - F4VQJ - / -12 4 Partial
06-30 18:50 20m -16 / - RA4FKZ - / -2 2 ✓ Confirmed
06-30 18:38 20m -17 / - EC3A - / -14 2 Partial
06-23 20:15 80m 0 / - DL9KM - / - 4 Partial
06-21 19:54 20m -4 / - DM4GG - / - 2 ✓ Confirmed
06-21 19:54 20m -6 / - F4MOH - / - 5 Partial
06-21 19:51 20m -7 / - DG5PW - / - 2 ✓ Confirmed
06-21 19:41 20m -9 / - OK1KM - / -16 2 Partial
06-16 19:50 20m -1 / - UN0GY -4 / - 2 ✓ Verified
06-14 20:16 20m -12 / - PD0PHA - / - 2 Partial
06-14 20:11 20m - / -15 SP5KG +3 / - 2 ✓ Confirmed
06-14 20:10 20m +10 / - IW4AOT - / -2 8 Partial
06-14 20:09 20m - / -3 SP2ATB +5 / - 2 ✓ Confirmed

Station Log

20m 
UTC    dB  Freq  Message
172700 -13 2554  JR4GPA DD0AM RR73
172700  -2 2826  JR4GPA RG8G -08 (x2)
172730  -8 2546  JR4GPA R6DJR -12 (x2)
172930  +0 2827  JR4GPA EA5RO IM99 (x5)
175645 -10 2821  JR4GPA S58Z -02 (x2)
180115 -24 1468  JR4GPA EA7GHD RR73
184200  -2 2282  JR4GPA MM8WXA IO87 (x2)
80m 
UTC    dB  Freq  Message
201300  +0  525  JR4GPA DO5SOB JN48
201530  +0 1277  JR4GPA DL9KM JN68 (x4)
40m 
UTC    dB  Freq  Message
185700  -4  641  JR4GPA DK5DW JN68 (x3)
212915  +8  376  JR4GPA 9A4ZM JN86 (x3)
10m 
UTC    dB  Freq  Message
080430 -21 1521  DL9KM JR4GPA RR73
080600 -17 1521  YO3OBB JR4GPA -06 (x2)
080745 -12 1521  US4EX JR4GPA -04 (x2)
080845 -23 1521  YO7LCB JR4GPA -05 (x2)
081745 -21 1447  IU6UAQ JR4GPA RR73
085145 -15 1584  JR4GPA R6FMW R-03

SNR History by Band