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Amateur radio
| YEAR | CALL | CONTEST | MODE | CLASS | RESULT |
| 1990 | ZC4BS | CQWW | SSB | SO AB LP | 2nd Asia |
| 1991 | ZC4BS | IARU | MIX | SO AB LP | 6th World |
| 1991 | ZC4BS | CQWW | SSB | SO AB LP | 1st World Asian Record |
| 1993 | G4KIV | IARU | MIX | SO AB LP | 1st Great Britain |
| 1994 | G4KIV | CQWW | SSB | SO AB LP | 1st Great Britain |
| 1995 | G4KIV | CQWW | SSB | SO AB LP | 1st Great Britain 4th Europe |
| 1996 | G4KIV | CQWW | SSB | SO AB LP | 1st Great Britain 1st Europe 6th World |
| 1996 | G4KIV | CQWW | CW | SO AB LP | 1st Great Britain 2nd Europe |
| 2000 | ZC4BS | CQWW | CW | SO SB 10 LP | 2nd Asia |
| 2001 | ZC4BS | CQ WPX | SSB | SO AB LP | 1st Asia 3rd World |
| 2001 | ZC4BS | ARI | SSB | SO SB 15 LP | Asian Record |
| 2001 | ZC4BS | SP DX | MIX | SO SB 15 LP | 2nd Asia 3rd World |
| 2001 | ZC4BS | ALL ASIAN DX | SSB | SO SB 15 LP | 1st World |
| 2001 | ZC4BS | WAE DX | SSB | SO AB LP | 1st Asia |
| 2001 | ZC4BS | CQWW | CW | SO SB 15 LP | 1st Asia |
| 2001 | ZC4BS | ARRL 10 | MIX | SO LP | 1st Asia 3rd World |
| 2002 | ZC4BS | RUSSIAN DX | SSB | SO SB 15 LP | 9th World |
| 2002 | ZC40BS | RSGB JUBILEE | SSB | SO AB LP | 1st ZC4 |
| 2002 | ZC4BS | ARI | CW | SO AB LP | 1st Asia |
| 2002 | ZC4BS | CQ WPX | CW | SO AB QRP | 1st World Asian Record |
| 2004 | M0IPX | CQWW | CW | SO 80 LP | 1st UK |
| 2004 | G6M | CQWW | CW | SO 20 LP | 2nd EU 1st Great Britain |
| 2005 | M0IPX | RUSSIAN DX | CW/SSB | SO AB LP | Zone 14 Winner Plaque awarded |
| 2005 | G6M | CQWW | CW | SO 20 LP | 5th World 2nd Europe 1st Great Britain |