(!!!) (Best Pair) 6BQ7A GE black plates "U" getter NOS 1957 (12.8/12.2ma and 11.0/11.6ma) (Highest mA and Gm)
(!!!) (Best Single #2) E182CC=7119 Mullard SQ Holland NOS large "O" getter halo 1964 (30/34ma)
(!!!) (Best Single 1950's) 5687 Tungsol black plates "U" getter used/tests like new 1950's (36/39ma)
(!!!) (Best Single 1961) 6BQ7A RCA black plates NOS "D" getter 1961 (8.2/8.4ma) 1-3% section balance (Douk Audio, Modwright, Schiit)
(!!!) (Best Single) 6BQ7A GE gray plates U getter NOS 1962 (6.8/6.8ma) (1-2% section balance)
(!!!) (Best Single) 6BQ7A RCA black plates NOS 1967 (11.5/13.5ma)
(!!!) (Best Single) 6BZ7 RCA black plates large "D" getter NOS 1957 (11.6/12.4ma)
(!!!) (Best Single) CK5687WA Raytheon black plates "O" getter like new 1960 (35/38ma)
(!!!) (Recommended Pair) 6BK7B Tungsol black plates NOS "O" getter 1960's (7.5/8.6ma and 8.2/9.4ma)
(!!!) (Recommended Pair) 6BK7B Tungsol gray plates NOS "O" getter 1960's (10/11ma and 10.6/13.2ma)
(!!!) (Recommended Pair) 6BQ7A RCA black plates NOS 1967 (16.5/14ma and 15.5/18ma)
(!!!) (Recommended Pair) 6EM7=6EA7 Sylvania coin-base NOS 1970's (1.5ma/73ma and 1.8ma/65ma)
(!!!) (Recommended Single) 6BK7A Raytheon black plates NOS "D" getter 1950's (7.2/8.2ma) (great sub for 6N1P)
(!!!) (Recommended Single) 6BK7B Tungsol gray plates NOS 1960's (8.0/9.8ma) (great sub for 6N1P)
(!!!) (Recommended Single) 6BQ7A RCA black plates NOS 1962 (10/14ma)
(!!!) (Recommended Single) 6BZ7 RCA black plates "D" getter NOS 1957 (11.4/9.5ma)
(!!!) (Recommended Single) 6BZ7 RCA black plates "U" getter NOS 1957 (9.0/9.4ma)
(!!!) (Recommended Single) 6BZ7 RCA black plates large "O" getter NOS 1965 (13.0/14.2ma)
(!!!) (Single) CK-5687 Raytheon black plates "O" getter like new 1960 (30/33.5ma)
(!!!) (slightly microphonic pair) E182CC=7119 Mullard SQ Holland NOS "O" getter halo 1963 (33.8ma/33.8ma and 35.2/34.4ma) (Same Gm)
