4S7AB — FT8 station from Sri Lanka
Amateur radio station 4S7AB operating from Sri Lanka (grid square JO21). 1,462 FT8 spots received at SO8OO WebSDR, 156 CQ calls, active on 80m, 60m, 40m, 20m, 10m, over 12 days, best SNR +26 dB. Heard between 2026-04-21 and 2026-06-08.
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Overview
1,462
Total spots
156
CQ calls
12
Days active
-3 dB
Avg SNR
Bands
80m
20m
40m
60m
10m
First seen: 2026-04-21
Last seen: 2026-06-08 06:45 UTC
Last seen: 2026-06-08 06:45 UTC
Frequent QSO partners observed at SO8OO
Stations 4S7AB worked most often, as logged from our receiver:
Activity Heatmap
Location
QSO Logbook (as observed from SO8OO)
Format: our rx / partner reports
| Time | Band | 4S7AB | Partner | Partner SNR | Msgs | |
|---|---|---|---|---|---|---|
| 06-07 01:22 | 20m | -8 / - | N8GAS | - / - | 2 | Partial |
| 06-07 01:13 | 20m | -20 / -16 | UN9LCW | -7 / - | 3 | ✓ Verified |
| 06-07 01:13 | 20m | -4 / - | LA0FA | - / - | 3 | Partial |
| 06-07 01:13 | 20m | - / -14 | R9OON | -8 / - | 2 | ✓ Confirmed |
| 06-07 01:11 | 20m | -5 / - | IW5ALZ | - / - | 2 | Partial |
| 06-07 01:11 | 20m | +7 / -7 | W3LPL | -8 / -9 | 6 | ✓ Complete |
| 06-07 01:11 | 20m | - / -11 | HF0TT | -8 / - | 2 | ✓ Confirmed |
| 06-07 01:08 | 20m | -20 / - | KE2NV | - / - | 2 | Partial |
| 06-07 01:07 | 20m | - / -4 | TA3TK | -10 / - | 2 | ✓ Confirmed |
| 06-07 01:06 | 20m | -8 / - | IW5ALZ | - / - | 2 | Partial |
| 06-07 01:05 | 20m | -2 / -12 | AJ1I | -12 / -7 | 4 | ✓ Complete |
| 06-07 01:04 | 20m | - / -16 | EA3NY | -12 / - | 2 | Partial |
| 06-07 01:03 | 20m | -13 / - | KF4JHG | - / - | 8 | Partial |
| 06-07 01:03 | 20m | - / -15 | HS0ZPO | -13 / - | 2 | ✓ Confirmed |
| 06-07 01:02 | 20m | -14 / - | N8GAS | - / - | 2 | Partial |
| 06-07 01:01 | 20m | -2 / -16 | IW5ALZ | -11 / -9 | 4 | Partial |
| 06-07 01:00 | 20m | - / -15 | EA3NY | -12 / - | 2 | Partial |
| 06-07 00:58 | 20m | - / -17 | RV3IO | -9 / - | 2 | ✓ Confirmed |
| 06-07 00:57 | 20m | - / -10 | RD9U | -8 / - | 2 | ✓ Confirmed |
| 06-07 00:56 | 20m | -6 / -14 | EA1CQ | -8 / -4 | 4 | ✓ Complete |
| 06-07 00:55 | 20m | -14 / -8 | NP4PS | -8 / -6 | 4 | ✓ Complete |
| 06-07 00:53 | 20m | - / -4 | RL3DI | -8 / - | 2 | ✓ Confirmed |
| 06-07 00:53 | 20m | -2 / - | IW5ALZ | - / - | 2 | Partial |
| 06-07 00:52 | 20m | -14 / - | EA1CQ | - / - | 2 | Partial |
| 06-07 00:52 | 20m | - / -4 | RA6OY | -8 / - | 2 | ✓ Confirmed |
| 05-29 03:13 | 20m | - / -19 | R3KLE | -17 / - | 2 | Partial |
| 05-29 02:59 | 20m | - / -21 | UB6HJZ | -16 / - | 2 | ✓ Confirmed |
| 05-29 02:57 | 20m | - / -14 | US1EA | -14 / - | 2 | Partial |
| 05-29 02:55 | 20m | -16 / - | UA3AFR | -16 / -15 | 5 | ✓ Verified |
| 05-29 02:55 | 20m | -6 / -14 | SV5BYP | -17 / - | 3 | ✓ Verified |
| 05-29 02:53 | 20m | - / -20 | TA4EGI | -16 / - | 2 | ✓ Confirmed |
| 05-29 02:51 | 20m | - / -23 | HG5BMW | -14 / - | 2 | ✓ Confirmed |
| 05-29 02:48 | 20m | - / -5 | R4FDD | -14 / - | 2 | ✓ Confirmed |
| 05-29 02:43 | 20m | - / -17 | SV8IIQ | -14 / - | 2 | ✓ Confirmed |
| 05-29 02:42 | 20m | - / -22 | BH3HKG | -15 / - | 2 | ✓ Confirmed |
| 05-29 02:41 | 20m | - / -18 | R2GF | -14 / - | 2 | ✓ Confirmed |
| 05-29 02:38 | 20m | -4 / -10 | RX9YM | -14 / -12 | 5 | ✓ Complete |
| 05-29 02:37 | 20m | -9 / -8 | UT5MD | -12 / -15 | 5 | ✓ Complete |
| 05-29 02:36 | 20m | - / -16 | AB4YI | -12 / - | 2 | Partial |
| 05-29 02:34 | 20m | - / -13 | UA4FKT | -10 / - | 2 | ✓ Confirmed |
| 05-29 02:32 | 20m | -15 / -20 | R8FB | -10 / -6 | 6 | ✓ Complete |
| 05-23 18:09 | 40m | +9 / - | SQ8SV | - / -10 | 4 | ✓ Confirmed |
| 05-23 18:09 | 40m | -14 / - | RW6HPI | - / - | 2 | Partial |
| 05-23 18:05 | 40m | -5 / - | DK0KG | - / -5 | 3 | ✓ Confirmed |
| 05-23 18:02 | 40m | -9 / - | SV1EQU | - / - | 2 | ✓ Confirmed |
| 05-23 17:58 | 40m | +7 / - | F5UTN | - / +1 | 2 | ✓ Confirmed |
| 05-23 17:55 | 40m | +9 / - | SP3BVI | - / -16 | 4 | ✓ Confirmed |
| 05-23 17:54 | 40m | +6 / - | DL5MK | - / - | 2 | Partial |
| 05-23 17:53 | 40m | 0 / - | DH0KAI | - / -13 | 3 | ✓ Confirmed |
| 05-23 17:51 | 40m | +8 / - | LY8O | - / -13 | 2 | ✓ Confirmed |
Station Log
10m
UTC dB Freq Message 083930 -7 963 T77RN 4S7AB RR73 084100 -2 962 S57VG 4S7AB -07 (x3) 084330 -6 962 EA7KMM 4S7AB -08 (x2) 084430 -11 962 CQ 4S7AB NJ07 084600 -11 962 EW8AK 4S7AB -13 (x2) 084700 -8 962 RK1N 4S7AB R-01 084830 -8 963 UT7EM 4S7AB -10 (x2) 074545 -4 1460 4S7AB YD2BXG RR73 075715 -17 967 4S7AB YB3HQM -20 084545 -5 2350 4S7AB ON4BMA JO21
20m
UTC dB Freq Message 011200 -7 2255 W3LPL 4S7AB -07 011215 -3 2555 4S7AB IW5ALZ JN53 011215 +9 1287 4S7AB W3LPL R-09 011230 -8 2255 W3LPL 4S7AB RR73 011245 +9 1288 4S7AB W3LPL 73 011300 -7 2255 R9OON 4S7AB -14 011315 -4 585 4S7AB LA0FA JO59 011330 -9 2255 R9OON 4S7AB RR73 011345 -4 585 4S7AB LA0FA JO59 011345 -20 2110 4S7AB UN9LCW MO13 011400 -6 2255 UN9LCW 4S7AB -16 011415 -5 585 4S7AB LA0FA JO59 011430 -8 2255 UN9LCW 4S7AB RR73 012215 -8 2303 4S7AB N8GAS EN82 (x2)
40m
UTC dB Freq Message 180315 -8 2237 4S7AB SV1EQU 73 180515 -3 1335 4S7AB DK0KG JN49 180515 -7 1942 4S7AB SP9NCO JO90 180515 -9 1963 4S7AB 2E0TLF IO84 180545 -6 1334 4S7AB DK0KG R-05 (x2) 180845 -8 1555 4S7AB PA2WDR JO21 180915 -12 1817 4S7AB RW6HPI LN25 180945 +12 2477 4S7AB SQ8SV KN19 (x2) 181015 -16 1816 4S7AB RW6HPI LN25 181045 +10 2477 4S7AB SQ8SV R-10 (x2) 181145 -3 1283 4S7AB R3XBB -14 181215 -5 911 4S7AB RW6B KN93
60m
UTC dB Freq Message 200300 +5 642 4S7AB DB6LL JO43 200315 -1 696 CQ 4S7AB NJ07 200330 +17 285 4S7AB UW5ZM KN57 200330 +4 642 4S7AB DB6LL JO43 200330 -2 2686 4S7AB EA3KS JN11 200345 -6 696 CQ 4S7AB NJ07 200400 +12 697 4S7AB UW5ZM KN57 200400 +6 642 4S7AB DB6LL JO43 200400 -1 2686 4S7AB EA3KS JN11 200430 +12 697 4S7AB UW5ZM KN57 200600 -8 695 4S7AB EA1BQR -13 201730 -2 642 4S7AB DB6LL R-26 (x4)
80m
UTC dB Freq Message 203345 +7 2302 4S7AB E75CC JN93 (x2)