OK4SU — FT8 station from Czech Republic
Amateur radio station OK4SU operating from Czech Republic. 568 FT8 spots received at SO8OO WebSDR, 108 CQ calls, active on 60m, 40m, 20m, 10m, over 27 days, best SNR +21 dB. Heard between 2026-04-27 and 2026-07-24.
FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee
Overview
568
Total spots
108
CQ calls
27
Days active
-6 dB
Avg SNR
Bands
20m
40m
60m
10m
First seen: 2026-04-27
Last seen: 2026-07-24 12:29 UTC
Last seen: 2026-07-24 12:29 UTC
Frequent QSO partners observed at SO8OO
Stations OK4SU worked most often, as logged from our receiver:
Activity Heatmap
Location
QSO Logbook (as observed from SO8OO)
Format: our rx / partner reports
| Time | Band | OK4SU | Partner | Partner SNR | Msgs | |
|---|---|---|---|---|---|---|
| 07-24 14:28 | 10m | -13 / - | PD1HBL | - / -18 | 2 | Partial |
| 07-24 09:27 | 20m | +7 / - | IK4LZH | - / - | 4 | Partial |
| 07-24 09:24 | 20m | - / -14 | GM3AND | -2 / - | 4 | Partial |
| 07-24 08:59 | 20m | - / +3 | DF3IS | -11 / - | 2 | ✓ Confirmed |
| 07-24 08:52 | 20m | -18 / - | PD3LKN | - / - | 2 | Partial |
| 07-24 08:45 | 20m | -2 / - | IK4LZH | - / - | 3 | Partial |
| 07-24 08:40 | 20m | - / +2 | SQ8ECJ | -5 / - | 2 | ✓ Confirmed |
| 07-24 08:40 | 20m | -6 / - | 9A1CCS | - / - | 2 | Partial |
| 07-24 08:37 | 20m | -10 / -3 | DL3MIB | -2 / -16 | 5 | ✓ Complete |
| 07-24 08:32 | 20m | -5 / - | 9A4DK | - / -14 | 3 | ✓ Confirmed |
| 07-24 06:41 | 40m | - / -28 | PD2MAC/P | -10 / - | 2 | ✓ Confirmed |
| 07-24 06:40 | 40m | - / -27 | F4AGZ | -19 / - | 2 | ✓ Confirmed |
| 07-24 06:36 | 40m | - / -2 | ND9M | -19 / - | 3 | Partial |
| 07-23 13:53 | 20m | -15 / - | DJ1TU | - / -8 | 3 | ✓ Confirmed |
| 07-23 13:53 | 20m | -14 / - | PD3LKN | - / - | 8 | Partial |
| 07-23 08:55 | 20m | -7 / - | TK5K | - / -5 | 2 | ✓ Confirmed |
| 07-23 08:52 | 20m | -18 / - | SV5AZK | - / -7 | 3 | ✓ Confirmed |
| 07-23 08:50 | 20m | 0 / - | PD7JLP | - / - | 2 | ✓ Confirmed |
| 07-22 09:29 | 20m | -21 / - | DK7JL | - / - | 3 | Partial |
| 07-22 09:28 | 20m | -10 / - | YO6PPX | -1 / - | 5 | Partial |
| 07-22 05:33 | 40m | -15 / - | UA4FKT | - / - | 2 | Partial |
| 07-21 14:26 | 40m | - / -13 | F4GVO | -16 / - | 4 | ✓ Confirmed |
| 07-21 14:23 | 40m | - / -6 | F1IQH | -8 / - | 2 | Partial |
| 07-21 12:27 | 20m | - / -1 | UB3DQR | -8 / - | 2 | Partial |
| 07-21 11:51 | 20m | -15 / - | PD3LKN | - / -18 | 7 | Partial |
| 07-21 11:02 | 20m | -17 / - | LZ1BT | - / - | 3 | Partial |
| 07-21 10:54 | 20m | -12 / - | F1PBZ | - / -19 | 2 | Partial |
| 07-21 07:48 | 20m | 0 / - | HG8LXL | - / +3 | 3 | ✓ Confirmed |
| 07-21 07:48 | 20m | +3 / - | YO3IZI | - / - | 4 | Partial |
| 07-21 06:06 | 40m | - / - | YL2IV | -18 / - | 2 | ✓ Confirmed |
| 07-21 06:05 | 40m | -12 / - | DL3MIB | - / - | 7 | Partial |
| 07-20 09:03 | 40m | - / -10 | OY1R | -22 / - | 2 | Partial |
| 07-15 11:32 | 20m | -8 / - | DL6CGN | - / +2 | 2 | ✓ Confirmed |
| 07-13 11:45 | 20m | -22 / - | PD2ARI | - / - | 3 | Partial |
| 07-10 08:41 | 40m | - / +6 | IW3HCN | -10 / - | 2 | ✓ Confirmed |
| 07-09 08:28 | 40m | - / -20 | <...> | -16 / - | 2 | ✓ Confirmed |
| 07-09 08:11 | 40m | - / +6 | MW3FLI | -16 / - | 2 | Partial |
| 07-09 05:32 | 20m | -5 / - | RX3ASQ | - / -2 | 2 | ✓ Confirmed |
| 07-08 07:47 | 40m | -17 / - | US1MM | - / -11 | 4 | ✓ Confirmed |
| 07-08 07:31 | 40m | - / +6 | DB1AA | -20 / - | 2 | ✓ Confirmed |
| 07-08 07:23 | 40m | -8 / +2 | IK4LZH | -22 / -19 | 2 | Partial |
| 07-08 07:10 | 40m | - / -14 | GJ0KYZ | -16 / - | 4 | Partial |
| 07-08 07:09 | 40m | - / -6 | M0ELS | -20 / - | 2 | Partial |
| 07-08 07:01 | 40m | - / -29 | KC2YYF | -15 / - | 5 | Partial |
| 07-08 07:00 | 40m | - / -27 | IQ4JO | -20 / - | 5 | Partial |
| 07-08 06:52 | 40m | - / -12 | OA4ENG | -18 / - | 3 | Partial |
| 07-07 09:31 | 20m | -19 / -10 | PD2RLD | -4 / - | 5 | Partial |
| 06-29 12:29 | 20m | -12 / - | DL1R | - / - | 6 | Partial |
| 06-26 10:47 | 20m | +2 / - | PD0IFI | - / - | 3 | Partial |
| 06-26 10:12 | 20m | - / -9 | RK6OV | -12 / - | 4 | ✓ Confirmed |
Station Log
10m
UTC dB Freq Message 093745 -11 1491 OK4SU DL5ALF JN48 (x3) 093915 -23 1297 CQ OK4SU JN89 a1 093915 -12 1491 OK4SU DL5ALF JN48 093930 -17 1469 OK4SU ON1JP -10 (x6) 094600 -3 1328 OK4SU F4VTR R-10 (x2) 142830 -11 1305 OK4SU PD1HBL R-18 (x2)
20m
UTC dB Freq Message 085645 -9 1206 CQ OK4SU JN89 (x3) 085915 -10 1209 DF3IS OK4SU +03 (x2) 090045 -14 1213 CQ OK4SU JN89 091245 -22 1210 OK4SU DL4DP JO31 092415 -1 787 GM3AND OK4SU -14 (x4) 092715 +13 464 OK4SU IK4LZH JN54 (x4)
40m
UTC dB Freq Message 142400 -10 662 F1IQH OK4SU -06 142600 -16 2312 F4GVO OK4SU -13 (x4) 053330 -13 1160 OK4SU UA4FKT LO23 (x2) 063615 -23 2187 ND9M OK4SU -02 (x3) 063900 -16 1148 CQ OK4SU JN89 064030 -14 1649 F4AGZ OK4SU -27 (x2) 064100 -10 355 PD2MAC/P OK4SU -28 (x2)
60m
UTC dB Freq Message 064530 -2 1247 CQ OK4SU JN89 064545 -7 1720 OK4SU SN5J KO02 064600 -1 1247 CQ OK4SU JN89 064615 +0 1720 OK4SU SN5J KO02 064630 +0 1247 SN5J OK4SU -08 064645 -1 1720 OK4SU SN5J R+02 064700 -1 1248 SN5J OK4SU RR73 064715 +2 1720 OK4SU SN5J 73 064815 -2 1248 HB9ACA OK4SU +01 (x4) 065430 -3 1249 <...> OK4SU -06 (x3)