JF1USM — FT8 station from Japan

Japan Grid: ?

Amateur radio station JF1USM operating from Japan. 30 FT8 spots received at SO8OO WebSDR, active on 40m, 20m, over 10 days, best SNR +19 dB. Heard between 2026-04-22 and 2026-06-14.

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

Overview

Total spots

CQ calls

Days active

+4 dB

Avg SNR

Bands

20m 40m

First seen: 2026-04-22
Last seen: 2026-06-14 21:07 UTC

Frequent QSO partners observed at SO8OO

Stations JF1USM worked most often, as logged from our receiver:

UA0LQE · Asiatic Russia ×2 R4NDG · European Russia 7Z1FV · Saudi Arabia 4L3YL · Georgia E70A · Bosnia-Herzegovina DK6XY · Fed. Rep. of Germany TF4M · Iceland OK2BRV · Czech Republic Z62NS · Republic of Kosovo HB9EFK · Switzerland

Activity Heatmap

Location

QSO Logbook (as observed from SO8OO)

Format: our rx / partner reports

Time	Band	JF1USM	Partner	Partner SNR	Msgs
06-14 23:07	20m	+4 / -	HB9EFK	- / -15	2	✓ Confirmed
06-12 19:26	20m	+19 / -	E70A	- / -18	3	✓ Confirmed
06-07 19:07	20m	-1 / -	R4NDG	-11 / -16	4	✓ Verified
06-07 19:01	20m	+10 / -	Z62NS	-8 / +5	4	✓ Verified
06-04 19:11	20m	+1 / -	OK2BRV	- / -15	2	✓ Confirmed
06-04 19:10	20m	+12 / -	F6BIA	- / -	2	Partial
06-04 19:07	20m	+6 / -	DK6XY	- / -10	5	✓ Confirmed
06-02 19:52	20m	- / -10	<...>	-11 / -	2	Partial
06-01 20:58	20m	- / -	IZ5WTV	-12 / -	2	Partial
05-20 18:02	20m	-2 / -	7Z1FV	- / -14	2	✓ Confirmed
05-12 20:02	20m	0 / -	TF4M	- / -14	2	✓ Confirmed
05-02 20:09	20m	- / -	A92AE	-9 / -	4	Partial
05-02 19:51	20m	-11 / -10	4L3YL	-4 / -	6	✓ Verified
04-22 18:47	40m	+12 / -	RJ6B	- / -	2	Partial

Station Log

20m

UTC    dB  Freq  Message
185845  -9 2852  Z62NS JF1USM QM05 (x3)
190300 +14  965  JF1USM Z62NS +05 (x2)
190515 -10 2929  UA0LQE JF1USM RR73
190700  -4 2772  JF1USM R4NDG LO48 (x2)
190745 -11 2876  R4NDG JF1USM RR73
190800  -1 2772  JF1USM R4NDG 73
192600 +19 2855  JF1USM E70A -18 (x3)
230715  +3 2382  JF1USM HB9EFK -15 (x2)

40m

UTC    dB  Freq  Message
184730 +13 2978  JF1USM RJ6B KN95 (x2)