(!!!!!) (Best Overall Pair) 403B Western Electric NOS "D" getter 1969 (9.6/10.2ma) (same Gm)
(!!!!) (2nd Best Pair) JHY-6AK5 Hytron black plate NOS 1952 (9.8ma and 9.4ma) 1-5% matched
(!!!!) (Recommended Pair) 403B Western Electric NOS "D" getter 1969 (5.6/5.6ma) 1% matched
(!!!!) (Recommended Pair) 403B=6AK5 Western Electric NOS "D" getter 1969 (7.3/7.0ma)
(!!!!) (Recommended Pair) JHY-6AK5 Hytron black plate NOS 1952 (7.3ma and 7.6ma)
(!!!!) (Recommended Pair) JHY-6AK5 Hytron black plate NOS 1952 (8.9ma and 9.3ma)
(!!!!) 6AK5 GE NOS 1973 (10.2ma)
(!!!) (Recommended Pair) JHY-6AK5 Hytron black plate NOS 1952 (5.8ma and 5.8ma)
(!!!) (Recommended Pair) JHY-6AK5 Hytron black plate NOS 1952 (8.0ma and 8.2ma)
(!!!) (Recommended Pair) JTL-5654=6AK5W Tungsol gray plate "D" getter used/good 1956-1958 (6.4ma and 6.5ma)
(!!) (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)
(!!) 403A=6AK5 Western Electric "D" getter like new 1966 (7.5ma)
(!!) 403A=6AK5 Western Electric NOS "D" getter 1971 (6.8ma)
(!!) 403A=6AK5 Western Electric NOS 1974 (6.6ma)
(!!) 403A=6AK5 Western Electric used/good 1970 (8.2ma)
(!!) 403B=6AK5 Western Electric NOS "O" getter 1980 in 1979 box (5.8ma)
5654=6AK5W=EF95 Radio Technique (RT) France NOS 1962 (5.7ma)
