(!!!!) (Recommended Pair) 403B Western Electric NOS "D" getter 1969 (5.7/5.6ma) 1-2% matched
(!!!) (Best Single) 403A Western Electric NOS "D" getter 1957 (8.7ma)
(!!!!) (Recommended Pair) 403B Western Electric NOS "D" getter 1969 (6.8/7.0ma)
(!!!!!) (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) JHY-6AK5 Hytron black plate NOS 1952 (9.4ma and 9.8ma)
(!!!) (Recommended Pair) JHY-6AK5 Hytron black plate NOS 1952 (5.8ma and 5.8ma)
(!!) (Set of 4) JHY-6AK5 Hytron black plate NOS 1952 (test between 6-8ma unmatched) (4 for $39.99)
(!!!!) (Best Pair #2) JHY-6AK5 Hytron black plate NOS 1952 (8.9ma and 9.3ma)
(!!!) (Single) 403A Western Electric NOS "D" getter 1957 (5.7ma)
(!!!) (Best Pair) JHY-6AK5 Hytron black plate NOS 1952 (8.7ma and 8.8ma)
(!!) 5654=6AK5 RCA Command Series black plate NOS 1968 (6.8ma)
(!!!!) 5654=6AK5W GE 5 Star NOS "D" getter 1959 (7.6ma)
