(!!!!) (Recommended Pair) 403B Western Electric NOS "O" getter halo 1977-1980 (6.4/6.1ma)
(!!!!) (Recommended Pair) 6AK5 GE NOS 1964 (8.1/8.3ma)
(!!!!) (Recommended Pair) 6AK5 GE NOS 1964 (9.6/10.2ma)
(!!!!) (Recommended Pair) 6AK5 RCA gray plate NOS 1964 (6.2/6.5ma)
(!!!!) 6AK5 GE NOS 1964 (8.6ma)
(!!!) (Best 403A pair) 403A Western Electric NOS "D" getters 1960-1966 (8.2ma and 8.4ma) (Best 6AK5 sub) 1-3% matched
(!!!) (Recommended Pair) 403A Western Electric NOS "D" getter halo 1963-1967 (8.1/8.6ma)
(!!!) (Recommended Pair) 6AK5 Western Electric "D" getter NOS 1954-1957 (6.9/7.0ma) 1-2% matched
(!!) (1 set of 10 tubes) 403A=6AK5 Western Electric used/good D getter halo 1950-1959 (1 set of 10 tubes)
(!!) (Best Single) 403A=6AK5 Western Electric NOS 1973 (8.1ma)
(!!) (Recommended Pair) 6AK5 Western Electric "D" getter NOS 1959 (6.2/6.4ma)
(!!) (Recommended Pair) JTL-6AK5 Tungsol black plate used/good 1952 (6.2/6.4ma)
(!!) (Recommended Pair) JTL-6AK5 Tungsol gray plate used/good 1952-1953 (6.3ma/6.4ma)
(!!) 6AK5 RCA gray plate NOS 1970 era (8.3ma)
(!!) 6AK5 Western Electric used/good 1955 (5.7ma)
(!!) 6AK5 Western Electric used/good 1955 (6.2ma)
(!) 5654=6AK5W Amperex Globe Logo by Mullard UK NOS 1968 (6.4ma)
(!) 5654=6AK5W Amperex PQ by RCA black plate NOS 1978 (7.0ma)
5654=6AK5W=EF95 Radio Technique (RT) France NOS 1962 (5.7ma)
6AK5 Motorola GE NOS 1977 (7.6ma)
