OK4SU — FT8 station from Czech Republic
Amateur radio station OK4SU operating from Czech Republic (grid square EK57). 511 FT8 spots received at SO8OO WebSDR, 66 CQ calls, active on 60m, 40m, 20m, over 10 days, best SNR +21 dB. Heard between 2026-04-21 and 2026-05-06.
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Overview
511
Total spots
66
CQ calls
10
Days active
-5 dB
Avg SNR
Bands
20m
40m
60m
First seen: 2026-04-21
Last seen: 2026-05-06 06:37 UTC
Last seen: 2026-05-06 06:37 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 | |
|---|---|---|---|---|---|---|
| 05-06 08:37 | 20m | -6 / - | V31DL | - / - | 2 | Partial |
| 05-06 08:09 | 20m | +7 / - | F4JQI | - / -14 | 4 | ✓ Confirmed |
| 05-06 06:56 | 20m | -7 / - | R4FDW | - / - | 8 | Partial |
| 05-06 06:12 | 20m | -14 / - | UA4FKT | - / -24 | 3 | Partial |
| 05-04 08:03 | 20m | +1 / - | 9H4JX | - / -12 | 3 | Partial |
| 05-04 06:54 | 60m | - / -6 | <...> | -4 / - | 3 | Partial |
| 05-04 06:48 | 60m | - / +1 | HB9ACA | -3 / - | 4 | Partial |
| 05-04 06:45 | 60m | -2 / -8 | SN5J | 0 / +2 | 6 | ✓ Complete |
| 05-04 06:41 | 60m | -16 / -4 | OE6TNO | 0 / -2 | 5 | ✓ Complete |
| 05-04 04:44 | 60m | -13 / - | DF4WQ | - / - | 4 | Partial |
| 05-04 04:44 | 60m | -6 / - | EU6KA | - / - | 2 | Partial |
| 05-04 04:44 | 60m | -2 / -14 | SQ7LQT | -12 / - | 3 | ✓ Verified |
| 05-04 04:42 | 60m | +13 / - | HA7TM | - / - | 3 | Partial |
| 05-01 19:36 | 20m | -10 / - | JG1DLY | - / -10 | 2 | ✓ Confirmed |
| 05-01 18:10 | 40m | +3 / - | IV3IHV | - / -8 | 7 | ✓ Confirmed |
| 04-30 08:14 | 20m | +11 / - | RU3OH | - / - | 3 | ✓ Confirmed |
| 04-30 07:52 | 20m | -16 / - | EB4FSM | - / - | 2 | Partial |
| 04-30 06:59 | 40m | - / -22 | N8HRZ | -12 / - | 2 | Partial |
| 04-30 06:55 | 40m | - / -16 | N8HRZ | -16 / - | 2 | Partial |
| 04-30 06:47 | 40m | -6 / -5 | IV3JJT | -18 / -14 | 4 | ✓ Complete |
| 04-30 04:50 | 40m | +1 / - | IZ4JMA | - / +1 | 4 | ✓ Confirmed |
| 04-28 06:44 | 20m | -12 / - | 9H4CM | - / -16 | 4 | ✓ Confirmed |
| 04-28 05:50 | 60m | -18 / - | DG1GCI | +1 / -8 | 3 | ✓ Verified |
| 04-28 05:33 | 60m | -20 / - | F1RCQ | - / - | 2 | Partial |
| 04-28 05:33 | 60m | - / -12 | IZ8PPI | -2 / - | 4 | Partial |
| 04-28 05:30 | 60m | - / -1 | M5AEH | -2 / - | 3 | ✓ Confirmed |
| 04-28 05:27 | 60m | - / -4 | G7RTI | +3 / - | 2 | ✓ Confirmed |
| 04-28 05:26 | 60m | -24 / -14 | SA7BYQ | +4 / -1 | 4 | ✓ Complete |
| 04-28 05:11 | 60m | -12 / - | F5MXH | - / - | 2 | Partial |
| 04-28 05:11 | 60m | -2 / - | SQ7LQT | - / - | 3 | Partial |
| 04-28 05:10 | 60m | -8 / - | G0BLB | - / - | 2 | Partial |
| 04-28 05:10 | 60m | 0 / - | OK1FAV | - / - | 2 | Partial |
| 04-28 05:08 | 60m | -11 / - | G6PWS | - / - | 3 | ✓ Confirmed |
| 04-28 05:08 | 60m | -12 / - | SP5EKL | - / - | 2 | Partial |
| 04-28 04:55 | 40m | +12 / - | IQ4JO | -5 / -7 | 3 | ✓ Verified |
| 04-28 04:52 | 40m | +1 / +2 | SM7HZK | -12 / -4 | 4 | ✓ Complete |
| 04-28 04:52 | 40m | - / -22 | VE9LS | -12 / - | 4 | Partial |
| 04-28 04:37 | 60m | - / -7 | US2YW | +5 / - | 2 | Partial |
| 04-28 04:24 | 60m | +12 / - | US2YW | - / - | 2 | Partial |
| 04-28 04:23 | 60m | +15 / - | SP9UPH | - / - | 5 | Partial |
| 04-28 04:20 | 60m | -7 / - | DF4WQ | - / - | 6 | Partial |
| 04-28 04:19 | 60m | -4 / - | G6PWS | - / - | 6 | Partial |
| 04-28 04:19 | 60m | -15 / - | ON1JP | - / +1 | 3 | Partial |
| 04-28 04:18 | 60m | +11 / - | OM3ZAS | - / - | 3 | Partial |
| 04-27 14:06 | 20m | +1 / - | UA3QNA | - / +7 | 3 | ✓ Confirmed |
| 04-27 10:24 | 20m | +11 / - | IS0/IK2YCW | - / -9 | 2 | Partial |
| 04-27 06:38 | 20m | +9 / - | UA6HGM | - / -7 | 4 | ✓ Confirmed |
| 04-27 06:38 | 20m | -14 / - | R8LCA | - / - | 4 | Partial |
| 04-27 05:32 | 20m | -4 / - | A60PE/5 | - / -20 | 2 | Partial |
| 04-27 05:31 | 20m | -15 / - | EC7DWP | - / - | 3 | Partial |
Station Log
20m
UTC dB Freq Message 061845 +0 1301 OK4SU R7OV KN87 065600 -3 2767 OK4SU R4FDW LO23 (x8) 080930 +8 1300 OK4SU F4JQI IN94 (x4) 083700 -5 341 OK4SU V31DL EK57 (x2)
40m
UTC dB Freq Message 180345 -9 1258 CQ OK4SU JN89 180415 -8 1258 SQ2NUH OK4SU R-01 181045 +8 1538 OK4SU IV3IHV JN66 (x7) 181845 -9 1259 CQ OK4SU JN89 (x2) 182730 -7 1260 DL1DEU OK4SU RR73 065745 -20 2324 OK4SU OZ3AAF R-16 070145 -13 1258 CQ OK4SU JN89 (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)