(!!) (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) 6S4A RCA black plate "U" getter NOS 1959 (21ma and 22ma)
(!!) (Best Pair) 6SH7 GE metal can NOS 1942-1945 (10.2ma and 10.2ma)
(!!) (Best Pair) 6SH7 GE metal can NOS 1970-1981 (11ma and 11.2ma)
(!!) (Best Pair) 6SH7 GE metal can NOS 1976 (11.2ma and 11.4ma) ** 1-2% matched (same Gm)
(!!) (Best Pair) 6SH7 GE metal can NOS 1976 (12.2ma and 12.4ma) **
(!!) (BEST PAIR) 7C5 Sylvania branded International NOS 1960's (42ma and 43.5ma) (LOKTAL BASE 6V6GT)
(!!) (Best Pair) ECC40 Philips NOS made by La Radiotechnique, Chartres/France 1969 (6.0/6.1ma and 6.0/6.1ma) 1-2% matched
(!!) (BEST PAIR) FAA-12AL5 Sylvania NOS 1965 (47-47/40 and 47-48/40)
