JF4HDR — FT8 station from Japan
Amateur radio station JF4HDR operating from Japan. 785 FT8 spots received at SO8OO WebSDR, 4 CQ calls, active on 160m, 60m, 40m, 20m, 10m, over 40 days, best SNR +26 dB. Heard between 2026-04-21 and 2026-07-18.
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Overview
785
Total spots
4
CQ calls
40
Days active
-2 dB
Avg SNR
Bands
20m
40m
60m
10m
160m
First seen: 2026-04-21
Last seen: 2026-07-18 20:56 UTC
Last seen: 2026-07-18 20:56 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
| Time | Band | JF4HDR | Partner | Partner SNR | Msgs | |
|---|---|---|---|---|---|---|
| 07-18 22:52 | 20m | -12 / - | DL1CC | - / - | 8 | Partial |
| 07-18 21:30 | 20m | -10 / - | OK1VM | - / -3 | 4 | ✓ Confirmed |
| 07-18 21:11 | 40m | -4 / - | IQ4JO | - / -10 | 2 | ✓ Confirmed |
| 07-18 21:06 | 40m | -1 / - | G4IFX | - / - | 3 | Partial |
| 07-18 21:02 | 40m | -6 / - | LZ3CB | - / -4 | 2 | ✓ Confirmed |
| 07-18 21:00 | 40m | -14 / - | SV2AOB | - / -12 | 2 | ✓ Confirmed |
| 07-18 20:34 | 40m | -4 / - | SP2FWC | - / -13 | 3 | Partial |
| 07-18 20:17 | 40m | -3 / - | F6HRP | - / -14 | 2 | ✓ Confirmed |
| 07-16 21:16 | 20m | -9 / - | EA2EWL | - / -19 | 2 | ✓ Confirmed |
| 07-14 20:50 | 40m | -7 / - | EA7ALL | - / -10 | 3 | ✓ Confirmed |
| 07-14 20:36 | 40m | -17 / - | DK7ZT | - / -17 | 7 | Partial |
| 07-14 20:28 | 40m | -10 / - | DK7ZT | - / -11 | 4 | Partial |
| 07-14 20:22 | 40m | -12 / - | YO6PNM | - / -4 | 2 | ✓ Confirmed |
| 07-14 20:22 | 40m | -9 / - | YO9BGU | - / -13 | 6 | Partial |
| 07-14 20:20 | 40m | -13 / - | G7FPE | - / - | 3 | Partial |
| 07-14 20:20 | 40m | +6 / - | LY2HM | - / -15 | 2 | ✓ Confirmed |
| 06-25 21:22 | 20m | -16 / - | HB9TIH | - / -19 | 4 | ✓ Confirmed |
| 06-25 21:15 | 20m | -11 / - | EA7BD | - / -20 | 4 | ✓ Confirmed |
| 06-25 20:56 | 40m | -10 / - | EA8UP | - / -17 | 7 | ✓ Confirmed |
| 06-23 20:00 | 40m | -8 / - | YO8RQP | - / - | 2 | Partial |
| 06-23 19:59 | 40m | -7 / - | UR5ZHJ | - / -11 | 2 | ✓ Confirmed |
| 06-23 19:46 | 40m | +5 / - | UA3GU | - / -2 | 2 | ✓ Confirmed |
| 06-23 19:45 | 40m | -14 / - | YL3CU | - / -8 | 2 | ✓ Confirmed |
| 06-16 21:00 | 20m | - / - | F1PAR | -13 / - | 2 | Partial |
| 06-16 20:34 | 20m | -7 / - | F1HFP | - / - | 3 | Partial |
| 06-16 20:33 | 20m | - / - | OZ7CL | -6 / - | 2 | Partial |
| 06-16 20:32 | 20m | - / - | DK8RE | -6 / - | 2 | ✓ Confirmed |
| 06-16 20:29 | 20m | -8 / -3 | RI0SP | -5 / -10 | 4 | ✓ Complete |
| 06-16 20:28 | 20m | - / -16 | PD0IFI | -3 / - | 2 | ✓ Confirmed |
| 06-16 20:27 | 20m | - / -18 | BG5FRH | -3 / - | 5 | Partial |
| 06-16 20:25 | 20m | - / -11 | IZ7XNB | -2 / - | 2 | ✓ Confirmed |
| 06-16 20:23 | 20m | - / -20 | LU1EAF | -1 / - | 4 | ✓ Confirmed |
| 06-16 20:21 | 20m | - / - | OK1ZJK | +1 / - | 3 | Partial |
| 06-16 20:20 | 20m | +8 / - | F1POK | +2 / - | 2 | ✓ Verified |
| 06-16 20:18 | 20m | - / -21 | YO5IM | -1 / - | 3 | ✓ Confirmed |
| 06-16 20:16 | 20m | - / -17 | DJ0VOG | +2 / - | 4 | ✓ Confirmed |
| 06-16 20:14 | 20m | - / -19 | IZ4JMA | +2 / - | 2 | ✓ Confirmed |
| 06-16 20:13 | 20m | +3 / - | EA1IOK | - / - | 3 | Partial |
| 06-16 20:12 | 20m | -13 / - | R1BEO | +4 / -3 | 2 | ✓ Verified |
| 06-16 20:09 | 20m | -20 / -6 | R1BEO | +7 / -3 | 2 | Partial |
| 06-16 20:09 | 20m | +4 / - | F1HFP | - / - | 10 | Partial |
| 06-16 20:08 | 20m | - / -11 | HB9TIH | +4 / - | 2 | ✓ Confirmed |
| 06-16 20:05 | 20m | - / +6 | RW3ATR | +4 / - | 3 | Partial |
| 06-16 20:04 | 20m | +25 / +8 | IW9HPG | -1 / - | 3 | ✓ Complete |
| 06-16 20:03 | 20m | -3 / - | F4NGC | - / - | 3 | Partial |
| 06-16 20:03 | 20m | - / -12 | DK3TNA | +2 / - | 2 | ✓ Confirmed |
| 06-16 20:02 | 20m | - / +6 | LA2JKA | +2 / - | 2 | ✓ Confirmed |
| 06-16 20:01 | 20m | +2 / - | ON3AVT | - / - | 13 | Partial |
| 06-16 20:01 | 20m | -2 / - | F4AMF | - / - | 2 | Partial |
| 06-16 20:00 | 20m | 0 / - | F4NJB | - / - | 5 | Partial |
Station Log
20m
UTC dB Freq Message 211630 -11 1809 JF4HDR EA2EWL RR73 211800 -4 2909 JF4HDR <...> -01 213045 -10 2122 JF4HDR OK1VM -03 (x4) 224100 +17 2891 JF4HDR <...> +00 225230 -11 1367 JF4HDR DL1CC +16 (x8)
40m
UTC dB Freq Message 201700 -1 454 JF4HDR F6HRP -14 (x2) 203445 -2 1264 JF4HDR SP2FWC JO94 (x3) 210030 -15 2341 JF4HDR SV2AOB -12 (x2) 210200 -7 1675 JF4HDR LZ3CB -04 210230 -11 2692 JF4HDR F5PBG IN78 210230 -6 1675 JF4HDR LZ3CB RR73 210600 -2 2851 JF4HDR G4IFX IO91 (x3) 211145 -3 2553 JF4HDR IQ4JO -10 (x2)
160m
UTC dB Freq Message 213800 -16 1388 JF4HDR S50PV JN76
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 103900 +9 2088 JF4HDR SK0TM -08
60m
UTC dB Freq Message 200615 -17 1532 JF4HDR DK7ZT +00 (x4)