(!!!!) (Recommended Pair) 403B Western Electric NOS "D" getter halo 1966-1970 (6.3/6.5ma) (6AK5 sub)
(!!!!) (Recommended pair) 403B Western Electric NOS "O" getter halo 1977 same date codes (6.6/7.2ma)
(!!!!) (Recommended Pair) 403B Western Electric NOS "O" getter halo 1977-1980 (6.4/6.1ma)
(!!!!) (Recommended Pair) 5654=6AK5W GE 5 Star NOS 1965 and 1973 (6.5/7.0ma)
(!!!) (Best 403A pair) 403A Western Electric NOS "D" getters 1960-1966 (8.2ma and 8.4ma) (Best 6AK5 sub) 1-3% matched
(!!!) (Best Single) 6AK5W/5654 Telefunken Germany <> bottom NOS branded AEG (10ma)
(!!!) (Recommended Pair) 403A Western Electric NOS "D" getter halo 1963-1967 (8.1/8.6ma)
(!!!) (Recommended Pair) 6AK5 RCA gray plate NOS 1964 (6.2/6.5ma)
(!!!) (Recommended Pair) 6AK5 RCA gray plate NOS 1964 (8.8/9.0ma)
(!!!) (Recommended Pair) 6AK5 RCA gray plate NOS 1970 era (9.2/10ma)
(!!!) (Recommended Pair) 6AK5 Western Electric "D" getter NOS 1954-1957 (6.9/7.0ma) 1-2% matched
(!!!) (Recommended Pair) JTL-6AK5 Tungsol gray plate "D" getter used/very good 1952-1953 (6.8ma and 7.0ma)
(!!!) (Recommended Pair) JTL-6AK5 Tungsol gray plate "D" getter used/very good 1953 (6.7ma and 6.7ma)
(!!) (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 gray plate "D" getter used/very good 1952-1953 (7.9ma and 8.1ma)
(!!) (Recommended Pair) JTL-6AK5 Tungsol gray plate "D" getter used/very good 1953-1954 (8.8ma and 9.1ma)
(!!) (Recommended Single) EF95=6AK5 Miniwatt by Mullard NOS 1969 (10.2ma) (Highest Ma and Gm)
(!!) 6AK5 RCA gray plate NOS 1970 era (8.3ma)
