Have you worked one of those DXpeditions? Yes? Then you most propably worked an RF2K-S power amplifier on the other side.
J51A 2026
Days 20
Operators 5
QSOs 256,172 (49,874 uniques)
Amplifiers 5x RF2K-S
NEW DXpedition QSO record: 256,172
NEW DXpedition Unique record: 49,874
NEW DXPedition record for 160 m QSOs: 8,270
NEW DXPedition record for 12 m QSOs: 36,611
NEW DXpedition Unique record: 49,874
NEW DXPedition record for 160 m QSOs: 8,270
NEW DXPedition record for 12 m QSOs: 36,611
VP2VI 2025
Days 17
Operators 4
QSOs 173,457
Amplifiers 5x RF2K-S
PX0FF 2024
Days 17
Operators 6
QSOs 159,072
Amplifiers 5x RF2K-S
3G0YA 2024
Days 19
Operators 3
QSOs 140,306
Amplifiers 4x RF2K-S
4W8X 2023
Days 28
Operators 20
QSOs 165,361
Amplifiers 2x RF2K-S (besides others)
W8S 2023
Days 11
Operators 10
QSOs 91,847
Amplifiers 1x RF2K-S (besides others)