YF4SDN — FT8 station from Indonesia
Amateur radio station YF4SDN operating from Indonesia (grid square LO23). 96 FT8 spots received at SO8OO WebSDR, 14 CQ calls, active on 20m, over 13 days, best SNR +20 dB. Heard between 2026-04-21 and 2026-06-17.
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Overview
96
Total spots
14
CQ calls
13
Days active
-7 dB
Avg SNR
Bands
20m
First seen: 2026-04-21
Last seen: 2026-06-17 12:54 UTC
Last seen: 2026-06-17 12:54 UTC
Frequent QSO partners observed at SO8OO
Stations YF4SDN worked most often, as logged from our receiver:
Activity Heatmap
Location
QSO Logbook (as observed from SO8OO)
Format: our rx / partner reports
| Time | Band | YF4SDN | Partner | Partner SNR | Msgs | |
|---|---|---|---|---|---|---|
| 06-17 14:54 | 20m | - / - | W7C | -15 / - | 2 | Partial |
| 06-17 14:54 | 20m | -6 / - | RZ4FWA | - / - | 2 | Partial |
| 06-16 15:14 | 20m | -6 / - | ON4TUK | - / - | 2 | Partial |
| 06-16 15:11 | 20m | -14 / - | PD5FM | - / - | 2 | Partial |
| 06-16 14:32 | 20m | - / - | W6C | -14 / - | 2 | Partial |
| 06-16 00:09 | 20m | - / - | 7X5CY | -12 / - | 6 | Partial |
| 06-15 15:58 | 20m | -18 / - | SH0EPN | - / - | 6 | Partial |
| 06-15 15:58 | 20m | -6 / - | R3BDQ | - / -10 | 3 | Partial |
| 06-15 15:57 | 20m | - / - | WT8P | -9 / - | 2 | ✓ Confirmed |
| 06-15 15:54 | 20m | +13 / - | DK1MAX | - / - | 3 | Partial |
| 06-15 15:38 | 20m | - / - | W7ZR | -11 / - | 5 | Partial |
| 06-15 15:34 | 20m | -12 / - | SV4ZQ | - / -8 | 6 | Partial |
| 06-15 15:31 | 20m | -2 / - | F4NLM | - / - | 3 | Partial |
| 06-15 15:27 | 20m | -15 / - | R7OQ | - / -21 | 5 | Partial |
| 06-15 15:26 | 20m | +4 / -18 | PD4WAC | -10 / - | 3 | ✓ Verified |
| 06-15 15:26 | 20m | -6 / - | SV4ZQ | -13 / -8 | 4 | ✓ Verified |
| 06-15 15:24 | 20m | -7 / - | SQ2FRF | - / - | 3 | Partial |
| 06-15 15:21 | 20m | +2 / -15 | PD7JLP | -12 / - | 4 | ✓ Verified |
| 06-15 15:19 | 20m | - / - | W7ZR | -14 / - | 3 | Partial |
| 06-15 14:53 | 20m | -6 / - | RV9WJP | - / - | 3 | Partial |
| 06-15 14:43 | 20m | +6 / - | F5RRS | - / - | 3 | Partial |
| 06-15 14:29 | 20m | +3 / - | RL2Y | - / -5 | 2 | Partial |
| 06-01 15:31 | 20m | - / - | AE6CH | -12 / - | 2 | Partial |
| 06-01 15:25 | 20m | -9 / - | IS0LBE | -15 / -3 | 8 | ✓ Verified |
| 06-01 15:21 | 20m | - / - | W7MWR | -16 / - | 2 | Partial |
| 05-26 00:51 | 20m | - / - | 9H1SR | -20 / - | 2 | Partial |
| 05-26 00:44 | 20m | +18 / -13 | EA6UE | -19 / -17 | 11 | ✓ Complete |
| 05-26 00:43 | 20m | - / - | 9H1SR | -18 / - | 2 | Partial |
| 05-16 15:50 | 20m | -17 / - | HB9TLI | - / - | 3 | ✓ Confirmed |
| 05-16 15:49 | 20m | -5 / - | MD0CCE | -18 / - | 2 | ✓ Verified |
| 05-15 14:21 | 20m | - / - | IS0KNG | -13 / - | 6 | Partial |
| 04-30 13:58 | 20m | -12 / - | JA9IFF | - / - | 2 | Partial |
| 04-29 14:19 | 20m | -20 / - | R1AD | - / - | 4 | Partial |
Station Log
20m
UTC dB Freq Message 151300 -16 699 YF4SDN PD5FM JO22 151400 -11 1597 YF4SDN ON4TUK JO20 (x2) 152430 -21 1516 YF4SDN UB0AMB NO66 144900 -16 1596 W7C YF4SDN OI24 145300 -14 1579 CQ USA YF4SDN OI24 145315 -13 295 YF4SDN RV9WJP MP72 145330 -16 1578 CQ USA YF4SDN OI24 (x2) 145415 -7 2055 YF4SDN RZ4FWA LO23 145430 -13 1579 W7C YF4SDN OI24 145445 -5 2055 YF4SDN RZ4FWA LO23 145530 -17 1578 W7C YF4SDN OI24 145945 -14 1578 AG7HY YF4SDN OI24 151045 -15 1578 NA6JD YF4SDN OI24