K4ISU — FT8 station from United States

United States Grid: JN45

Amateur radio station K4ISU operating from United States (grid square JN45). 198 FT8 spots received at SO8OO WebSDR, 28 CQ calls, active on 40m, 20m, over 13 days, best SNR +27 dB. Heard between 2026-04-24 and 2026-06-29.

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

Overview

198
Total spots
28
CQ calls
13
Days active
-6 dB
Avg SNR

Bands

20m 40m
First seen: 2026-04-24
Last seen: 2026-06-29 01:33 UTC

Frequent QSO partners observed at SO8OO

Stations K4ISU worked most often, as logged from our receiver:

Activity Heatmap

Location

QSO Logbook (as observed from SO8OO)

Format: our rx / partner reports

TimeBandK4ISUPartnerPartner SNRMsgs
06-29 03:28 40m -9 / - IK2ZJR - / - 11 Partial
06-29 03:19 40m -4 / - IK2ZJR - / - 5 Partial
06-29 03:15 40m -6 / - IK2ZJR - / - 2 Partial
06-29 02:30 20m -5 / - EB5AL - / -18 5 ✓ Confirmed
06-29 02:05 20m -9 / - EB5AL - / - 5 Partial
06-22 04:01 20m +7 / - UA6HBJ - / -12 3 ✓ Confirmed
06-22 03:47 20m -4 / - UA6HBJ - / - 2 Partial
06-22 03:42 20m -8 / - A71AT - / -13 4 ✓ Confirmed
06-22 02:32 20m -15 / - W1ABY - / -5 2 Partial
06-21 05:42 20m -7 / - F5HNQ - / - 3 Partial
06-21 05:37 20m -16 / - EA1CQ - / -13 3 Partial
06-15 02:58 20m -21 / - TA2EE - / - 2 Partial
06-15 02:48 20m -7 / - HB9VAA - / -24 4 Partial
06-15 02:46 20m - / -10 KE7KPY -19 / - 3 Partial
06-15 02:43 20m - / -9 R4FDK -18 / - 5 ✓ Confirmed
06-15 02:36 20m - / -13 AA1ZZ -17 / - 2 Partial
06-15 02:24 20m - / -15 AG7KU -18 / - 2 Partial
06-15 02:22 20m - / -12 N8GMZ -20 / - 2 Partial
06-01 04:07 20m -16 / - SP9UPH -10 / -2 2 Partial
06-01 03:58 20m -7 / - TA2EE - / - 6 Partial
06-01 03:58 20m - / -3 YO6OGJ -13 / - 2 ✓ Confirmed
06-01 03:53 20m - / -21 RV3DBV -14 / - 2 Partial
06-01 03:47 20m - / -23 KC3ZZ -22 / - 2 ✓ Confirmed
06-01 03:37 20m - / -5 RA3QUA -12 / - 2 ✓ Confirmed
06-01 03:29 20m - / -19 RX3AEX -11 / - 2 ✓ Confirmed
06-01 03:27 20m -22 / -10 9Y4DG -11 / -2 3 ✓ Complete
06-01 03:26 20m - / -8 SP1TJ -16 / - 2 Partial
06-01 03:24 20m -13 / -10 K5DZY -13 / - 2 ✓ Verified
06-01 03:12 20m - / -13 OH1LA -7 / - 2 Partial
06-01 03:02 20m -15 / +1 KC3VKP -10 / - 3 ✓ Verified
06-01 02:51 20m - / -1 SV1MOZ -8 / - 2 Partial
05-29 20:30 20m -4 / - EA4T - / -17 2 ✓ Confirmed
05-28 04:18 20m -8 / - KF0MSJ - / - 3 ✓ Confirmed
05-11 04:15 40m -12 / - OZ1BLP - / -18 3 ✓ Confirmed
05-11 04:13 40m +6 / - YO8RAW - / -15 2 Partial
05-11 04:08 40m -4 / - PA3BUD - / -10 2 Partial
05-11 04:02 40m +13 / - DL3MIB - / - 5 Partial
05-11 03:52 40m +1 / - US2UM - / - 5 Partial
05-11 03:49 40m -18 / - SQ8AGI - / -16 7 Partial
05-11 03:41 40m - / -4 DH5YBE -20 / - 2 Partial
05-11 03:37 40m -21 / - PA0ARR - / - 2 Partial
05-11 03:16 40m +5 / - IK1QLD - / - 2 Partial
05-11 02:50 20m -11 / - UN7EAX - / - 2 Partial
05-08 20:21 20m -6 / - EA4T - / -12 3 Partial
05-08 20:16 20m -4 / - EA4T - / -13 2 Partial
05-04 02:46 40m -21 / - K2DBK - / - 3 ✓ Confirmed
05-01 19:22 20m -9 / - EA5JKT - / -23 11 Partial
05-01 19:19 20m +1 / - EA4T - / -16 2 ✓ Confirmed
04-27 03:39 40m +11 / - 9A5CW - / - 5 Partial
04-27 03:05 40m +12 / - DL3MIB - / - 5 Partial

Station Log

40m 
UTC    dB  Freq  Message
032045  -4 2335  K4ISU IK2ZJR JN45 (x15)
20m 
UTC    dB  Freq  Message
034745  -9  882  K4ISU UA6HBJ LN04 (x5)
020545  -5 2336  K4ISU EB5AL IM99 (x10)

SNR History by Band