(!!) (Best Pair) 6A7G Marconi Radiotron Canada NOS 1950 era
(!!) (BEST PAIR) 6AE5GT Tungsol branded Delco NOS 1940's (8.5ma and 8.0ma)
(!!) (Best Pair) 6AG7 RCA NOS 1960's (27ma and 27.5ma)
(!!) (Best Pair) 6AV5GA Sylvania NOS 1960's same build (1) branded Silvertone (58.5ma and 60ma)
(!!) (Best Pair) 6AW8A GE NOS 1964 (4.5/4.3ma and 20/19ma) 1-3% matched (Shindo)
(!!) (Best Pair) 6BA7 Raytheon NOS large "D" getter mid-1950's (66/40 and 66/40)
(!!) (Best Pair) 6BH6 RCA NOS 1970 era (7.7ma and 8ma)
(!!) (BEST PAIR) 6BQ6GTB=6CU6 Sylvania JAN NOS 1960's (56ma and 56ma)
(!!) (BEST PAIR) 6BQ6GTB=6CU6 Sylvania NOS 1960's (54ma and 54.5ma)
(!!) (BEST PAIR) 6BQ6GTB=6CU6 Sylvania NOS 1960's (62ma and 61.5ma)
(!!) (BEST PAIR) 6CB6A RCA "D" getter NOS around 1960 (9.0ma and 9.2ma)
(!!) (BEST PAIR) 6CM7 GE NOS 1960's (5.7/5.9ma and 21.2/21.6ma)
(!!) (Best Pair) 6CZ5 RCA black plate 1960's same build (49.5ma and 51ma)
(!!) (BEST PAIR) 6DQ6B Sylvania NOS 1960's same build (78ma and 80ma)
(!!) (Best Pair) 6GK5=6FQ5A Hitachi Japan rebranded Raytheon and GE NOS 1970 era (9.6/10ma)
(!!) (BEST PAIR) 6HB5 Sylvania NOS (105ma and 115ma)
(!!) (Best Pair) 6J6A Tungsol NOS "D" getter 1961 (9.4/10.5ma and 9.0/11.4ma)
(!!) (Best Pair) 6KM6 Sylvania NOS (148ma and 147ma)
(!!) (BEST PAIR) 6LR6 RCA NOS 1970 era (86ma and 96ma)
(!!) (Best Pair) 6SH7 GE metal can NOS 1970-1981 (11ma and 11.2ma)
