JF4HDR — FT8 station from Japan

Japan Grid: ?

Amateur radio station JF4HDR operating from Japan. 274 FT8 spots received at SO8OO WebSDR, 1 CQ calls, active on 40m, 20m, 10m, over 15 days, best SNR +20 dB. Heard between 2026-04-21 and 2026-05-13.

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Overview

274
Total spots
1
CQ calls
15
Days active
-1 dB
Avg SNR

Bands

40m 20m 10m
First seen: 2026-04-21
Last seen: 2026-05-13 19:53 UTC

Frequent QSO partners observed at SO8OO

Stations JF4HDR worked most often, as logged from our receiver:

Activity Heatmap

Location

QSO Logbook (as observed from SO8OO)

Format: our rx / partner reports

TimeBandJF4HDRPartnerPartner SNRMsgs
05-13 22:02 20m - / - Z34K -3 / - 4 Partial
05-13 21:57 20m - / - LX1FP -5 / - 5 Partial
05-13 21:51 40m -16 / - UN8DSW - / -7 3 ✓ Confirmed
05-11 22:07 20m - / - EA8DHH -16 / - 2 Partial
05-11 21:46 20m - / - GM5RDX -11 / - 3 Partial
05-11 21:07 20m - / - YI3AA -20 / - 2 Partial
05-10 21:35 20m +4 / - EA5BLP - / - 4 Partial
05-10 21:33 20m - / -14 EY7BM +2 / - 4 ✓ Confirmed
05-10 21:27 20m - / - EY7BM -5 / - 4 Partial
05-10 21:23 20m - / - EY7BM -10 / - 3 Partial
05-10 21:03 20m - / -7 SA6BZZ -4 / - 4 ✓ Confirmed
05-10 20:57 20m +6 / -4 G8KHF -8 / -14 6 ✓ Complete
05-10 20:52 20m - / -16 SV4RRK -4 / - 5 ✓ Confirmed
05-10 20:41 20m +4 / +1 CR7BRV -12 / -13 5 ✓ Complete
05-10 20:38 20m -7 / - MM0JTV -17 / -15 5 Partial
05-10 20:34 20m 0 / - G0VDE - / -21 3 Partial
05-10 20:32 20m - / -16 MI0JZZ -6 / - 2 Partial
05-10 20:24 40m +8 / - S50XX - / -19 2 ✓ Confirmed
05-10 20:01 40m -2 / - SP5LST - / -5 2 Partial
05-10 19:59 40m -3 / - SV7TRK - / -8 7 ✓ Confirmed
05-10 19:59 40m -2 / - OG5O - / -9 2 ✓ Confirmed
05-10 19:56 40m +4 / - ES7GN - / -14 4 Partial
05-10 19:53 40m -6 / - ER5DX - / -15 2 ✓ Confirmed
05-08 20:19 40m 0 / - OD5ZF - / -7 2 ✓ Confirmed
05-08 09:17 20m -11 / - 5P1KZX - / -11 2 ✓ Confirmed
05-07 21:36 20m - / - TY5AD -5 / - 8 Partial
05-07 21:25 20m -1 / - EC3A - / -8 2 ✓ Confirmed
05-07 21:25 20m -5 / -15 OE9GWV -6 / -6 4 Partial
05-07 21:22 20m -2 / -16 EA8AJ -6 / - 6 ✓ Verified
05-07 21:04 20m +7 / - EA5ET - / - 6 ✓ Confirmed
05-07 20:44 20m -3 / - LZ7CC - / - 2 Partial
05-07 20:36 20m - / - AO6RKB -9 / - 2 Partial
05-07 20:32 20m - / - AO6RKB -9 / - 3 Partial
05-07 20:22 20m - / - GW0ARK -8 / - 5 Partial
05-07 20:13 20m - / - GW0ARK -4 / - 2 Partial
05-07 20:02 20m +3 / - PA3HFT - / -18 4 ✓ Confirmed
05-07 20:02 20m 0 / -7 D2ACE -10 / -9 2 Partial
05-06 22:22 20m +5 / - TF4M -14 / -10 2 Partial
05-06 22:17 20m -2 / - TN8GD - / -3 2 ✓ Confirmed
05-06 22:08 20m - / - TL8BNW -20 / - 2 Partial
05-06 22:06 20m - / -16 F4IBJ -24 / - 2 ✓ Confirmed
05-06 22:03 20m +15 / - CS8ABF -24 / -24 3 Partial
05-06 21:58 20m - / - CS8ABF -8 / - 2 Partial
05-06 21:28 20m -6 / -13 TF4M -11 / -12 7 Partial
05-06 21:19 40m +4 / - PI4DX - / -24 2 ✓ Confirmed
05-06 10:38 20m +2 / - UA4FKT - / - 3 Partial
05-06 10:38 20m -4 / - F4HDR - / - 2 Partial
05-05 09:09 20m +9 / - HB9CXZ - / -11 2 ✓ Confirmed
05-05 08:41 20m +9 / - DK8IF - / - 8 Partial
05-03 22:02 20m - / - A92AE -8 / - 3 Partial

Station Log

20m 
UTC    dB  Freq  Message
211930 -14 1032  YI3AA JF4HDR PM64
214645 -10 3096  GM5RDX JF4HDR PM64 (x3)
220745 -16 2517  EA8DHH JF4HDR PM64 (x2)
215745  -2 1134  LX1FP JF4HDR PM64 (x5)
220215  +3  337  Z34K JF4HDR PM64 (x4)
40m 
UTC    dB  Freq  Message
200130  -4 2664  JF4HDR SV7TRK KN21
200130  +0 2438  JF4HDR SP5LST -05 (x2)
200200  -4 2664  JF4HDR SV7TRK R-08 (x3)
200530 +11  680  JF4HDR <...> R-03
201945  -3 2076  JF4HDR SM3ULU JP81
202315 -13 1377  JF4HDR 4Z4DX RR73
202415  +6  814  JF4HDR S50XX -19 (x2)
214730 -14 2177  JF4HDR UN8DSW -05 (x4)
10m 
UTC    dB  Freq  Message
090300  -5 1096  JF4HDR 9K2MP -13 (x3)
090900 -20 1828  JF4HDR YE3AOV OI62 (x3)
104245 -14 2285  JF4HDR 5Z4VJ -08 (x4)
080145 -20 2096  JF4HDR HA9PP KN07
083645 -13 2495  JF4HDR ZS4JAN RR73

SNR History by Band