JH4IFF — FT8 station from Japan

Japan Grid: JO72

Amateur radio station JH4IFF operating from Japan (grid square JO72). 73 FT8 spots received at SO8OO WebSDR, 2 CQ calls, active on 160m, 80m, 40m, 20m, 10m, over 13 days, best SNR +16 dB. Heard between 2026-04-21 and 2026-05-12.

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

Overview

73
Total spots
2
CQ calls
13
Days active
-2 dB
Avg SNR

Bands

80m 20m 40m 10m 160m
First seen: 2026-04-21
Last seen: 2026-05-12 18:16 UTC

Frequent QSO partners observed at SO8OO

Stations JH4IFF worked most often, as logged from our receiver:

Activity Heatmap

Location

QSO Logbook (as observed from SO8OO)

Format: our rx / partner reports

TimeBandJH4IFFPartnerPartner SNRMsgs
05-12 20:15 40m -6 / - DL5BWG - / - 3 Partial
05-12 20:13 40m -2 / - UR5TL - / - 3 ✓ Confirmed
05-12 20:12 40m -10 / - RX7KIR - / -15 2 Partial
05-12 08:53 20m - / - <...> -19 / - 3 Partial
05-05 20:38 20m +8 / -14 CT7AXN +2 / - 4 ✓ Verified
05-05 20:37 20m - / -19 W0OVX +2 / - 2 ✓ Confirmed
05-05 20:35 20m -6 / -24 AO4RKB +1 / +9 7 ✓ Complete
05-05 20:33 20m -1 / -12 SV5BYP +1 / +6 4 ✓ Complete
05-05 20:24 40m 0 / - D2UY - / -3 3 ✓ Confirmed
05-05 20:22 40m +13 / -23 SX20RCK -14 / -9 2 Partial
05-05 20:17 80m +12 / - <...> - / -22 2 Partial
05-04 20:43 20m +8 / - F4IBJ - / - 7 ✓ Confirmed
05-04 20:24 40m +2 / - IW8BZE - / - 2 ✓ Confirmed
05-03 20:43 40m -18 / - CT3HU - / -20 2 Partial
05-03 20:39 40m +7 / - IQ4JO - / -19 3 ✓ Confirmed
05-02 20:37 20m - / -14 <...> -12 / - 5 Partial
05-01 21:41 20m -6 / - AU2M - / +5 2 ✓ Confirmed
04-30 20:15 40m - / -18 <...> -6 / - 2 Partial
04-29 20:41 20m - / -18 PE1MHY -8 / - 2 Partial
04-29 20:39 20m -9 / -15 EA3CSK -8 / +4 3 Partial
04-29 20:37 20m - / -20 PD0PHA -5 / - 2 ✓ Confirmed
04-29 20:36 20m - / -17 DG8DAO -4 / - 2 ✓ Confirmed
04-29 20:33 20m - / -20 EB4GSN 0 / - 2 ✓ Confirmed
04-29 20:32 20m - / -14 F4ACR 0 / - 2 Partial
04-29 20:31 20m - / -5 IZ5WTV 0 / - 2 ✓ Confirmed
04-29 20:27 20m - / -9 OK2VCR +2 / - 2 ✓ Confirmed
04-29 20:26 20m - / -21 ON8SGA +2 / - 3 ✓ Confirmed
04-27 09:08 10m -12 / - ZS3W - / -17 2 ✓ Confirmed
04-26 21:02 20m +2 / - A61OK -2 / -11 5 Partial
04-26 20:57 20m - / -10 A61CK -6 / - 4 Partial
04-23 20:54 40m -6 / - CR7BRV - / -15 2 ✓ Confirmed
04-23 20:46 40m - / - <...> -20 / - 2 Partial
04-23 20:41 40m - / -13 JT0LR -10 / - 4 ✓ Confirmed
04-22 20:56 80m -4 / - TF4M - / -9 2 Partial
04-21 20:30 40m -4 / - DA1MN - / - 3 Partial
04-21 20:28 40m - / - OH5BRB +5 / - 3 Partial
04-21 20:14 160m -8 / - UN0GY - / +8 2 ✓ Confirmed

Station Log

40m 
UTC    dB  Freq  Message
202400  +2 2744  JH4IFF D2UY -03 (x3)
203930 +10 2614  JH4IFF SX20RCK -06
200945  -7 1301  JH4IFF IQ8GT -15
201215  -8 1215  JH4IFF RX7KIR KN75 (x2)
201345  -4 1880  JH4IFF UR5TL KN38
201345  +8  908  JH4IFF <...> -13
201445  +0 1880  JH4IFF UR5TL KN38 (x2)
201545  -7  907  JH4IFF DL5BWG JO72 (x3)
205700  -7 1041  JH4IFF LZ100LZ -12
20m 
UTC    dB  Freq  Message
203600  -3 1650  JH4IFF AO4RKB +11
203615  +2  405  AO4RKB JH4IFF PM74
203630  -8 1650  JH4IFF AO4RKB +09
203645  -1  405  AO4RKB JH4IFF R-24
203700  -8 1650  JH4IFF AO4RKB RR73
203715  +4  405  AO4RKB JH4IFF 73
203745  +2  405  W0OVX JH4IFF -19 (x2)
203845  +3  405  CT7AXN JH4IFF PM74 (x2)
203930  +8 1578  JH4IFF CT7AXN RR73
203945  +1  405  CT7AXN JH4IFF 73
085315 -19 1254  <...> JH4IFF PM74 (x3)
80m 
UTC    dB  Freq  Message
205645  -1  424  JH4IFF TF4M -09 (x3)
201100 +14  980  JH4IFF <...> -18 (x3)
10m 
UTC    dB  Freq  Message
090845 -11  885  JH4IFF ZS3W -17 (x2)
160m 
UTC    dB  Freq  Message
201445  -8  827  JH4IFF UN0GY +08 (x2)

SNR History by Band