(!!!!!) (Recommended Pair) 403B Western Electric NOS "D" getter 1969 (5.5/5.3ma) 1-3% matched
(!!!!) (2nd Best Pair) JHY-6AK5 Hytron black plate NOS 1952 (9.8ma and 9.4ma) 1-5% matched
(!!!!) (Best Pair) 403B=6AK5 Western Electric NOS "D" getter 1969 (7.3/7.0ma)
(!!!!) (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)
(!!!!) (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)
(!!!) (Best Single) 403A Western Electric NOS "D" getter 1957 (8.7ma)
(!!!) (Best Value Pair) JAN-5654W=6AK5 GE black plate NOS 1982-1983 (8/9ma) (close Gm)
(!!!) (Best Value Pair) JAN-5654W=6AK5 GE gray plate NOS 1982-1983 (7.5/7.8ma)
(!!!) (Recommended Pair) JHY-6AK5 Hytron black plate NOS 1952 (5.8ma and 5.8ma)
(!!!) (Recommended Pair) JTL-5654=6AK5W Tungsol gray plate "D" getter used/good 1956-1958 (6.4ma and 6.5ma)
(!!!) (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)
