6240G Luxman by NEC Japan NOS 1960's (6.3/7.4ma)
6240G Luxman by NEC Japan NOS 1960's (6.7/8.0ma)
6350 RCA NOS "O" getter NOS 1960's (8.0/9.2ma)
6384 Tungsol used/good 1960's (63.5ma)
6973 Sylvania gray plate NOS 1970's (61ma)
6AR6 Raytheon black plate used/good 1952 (67ma)
6AW8A GE branded Westinghouse NOS 1964 (3.8/24ma)
6AW8A GE NOS 1976 (4.9/21ma)
6BA6 CBS tests like new (11ma)
6BA6 RCA Mexico NOS 1970 era (12ma)
6BL7GTA RCA coin-base NOS 1970's (31/32ma)
6BL7GTA RCA NOS 1968 (32/33.5ma)
6BQ5 GE NOS 1960's (40ma)
6BQ5 GE NOS 1960's (47ma)
6BQ5 GE NOS 1960's (70ma) (recommended for FIXED-BIAS amp only due to high current)
6BQ5 GE NOS 1971 (43.5ma)
6BQ5 GE NOS 1977 (58.5ma)
6BQ5 GE NOS/80-85% 1959 (36ma)
6BQ5 Lindal Japan like new 1970's (50ma)
6BQ5 Lindal Japan NOS 1970's (42ma)