(!!!!!) (Recommended Pair) 403B Western Electric NOS "D" getter 1969 (5.5/5.3ma) 1-3% matched
(!!!!) (Best Pair #2) JHY-6AK5 Hytron black plate NOS 1952 (8.2ma and 8.5ma) (close Gm) 1-3% matched
(!!!!) (Best Pair #2) JHY-6AK5 Hytron black plate NOS 1952 (8.9ma and 9.3ma)
(!!!!) (Recommended Pair) 403B Western Electric NOS "D" getter 1969 (5.7/5.6ma) 1-2% matched
(!!!!) (Recommended Pair) 403B Western Electric NOS "D" getter 1969 (6.8/7.0ma)
(!!!!) (Recommended Pair) 403B=6AK5 Western Electric NOS "D" getter 1969 (4.8/4.5ma)
(!!!!) 6AK5 GE NOS 1973 (10.2ma)
(!!!) (BEST PAIR) GB-5654=6AK5 Sylvania Gold Brand Gold Pins NOS 1960's (9.3ma and 9.9ma)
(!!!) (Best Pair) JHY-6AK5 Hytron black plate NOS 1952 (8.7ma and 8.8ma)
(!!!) (Best Pair) JHY-6AK5 Hytron black plate NOS 1952 (9.4ma and 9.8ma)
(!!!) (Best Single) 403A Western Electric NOS "D" getter 1957 (8.7ma)
(!!!) (Recommended Pair) JHY-6AK5 Hytron black plate NOS 1952 (5.8ma and 5.8ma)
(!!!) (Single) 403A Western Electric NOS "D" getter 1957 (5.7ma)
(!!) (Best 403B Single) 403B=5591=6AK5 Western Electric NOS "O" getter halo 1958 (8.2ma) (special quality)
(!!) (Best Single) JW-6AK5 Western Electric NOS "D" getter 1953 (6.2ma)
(!!) (Recommended Single) 6AK5 Tungsol gray plate NOS 1956 (8.3ma)
(!!) (Set of 4) JHY-6AK5 Hytron black plate NOS 1952 (test between 6-8ma unmatched) (4 for $39.99)
(!!) (Single) 403B=6AK5 Western Electric NOS "O" getter halo 1969 (5.3ma)
(!!) 403A=6AK5 Western Electric "D" getter like new 1966 (7.5ma)
(!!) 403A=6AK5 Western Electric NOS "D" getter 1971 (6.8ma)
