In 1982 i bought an Dressler
D200S PA with 4cx350a tube but the power was not realy enoug to work CW EME with it, 37 QSO's. In 1987 i bought the COENS V1300B (ON5FF) with 3cx800 tube and gave me easy 1KW in CW and made another 93 CW EME QSO's The PA had never an failure and is still running with the same
EIMAC 3CX800 tube !!
More than 22 years in service now.