6N7GT RCA NOS 1940's (2.5/3.1ma)
6N7GT RCA branded Sylvania NOS 1950's (2.5/2.6ma)
6N7GT RCA used/good 1940's (2.4/2.3ma)
6C5GT Sylvania NOS 1948 (7.4ma)
6C5GT National Union NOS 1951 (7.8ma)
6C5GT Sylvania NOS 1940's (7.8ma)
(!!!) (Best Pair) 864=VT-24 Hytron USA NOS 1940's (3.2ma and 3.2ma)
(!!!) (Best Pair) 864=VT-24 Hytron USA NOS 1940's (3.4ma and 3.4ma)
(!!!) (Best Pair) 864=VT-24 Hytron USA NOS 1940's (3.1ma and 3.1ma)
(!!!!) (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)
(!!!) (Best Overall Pair) 864=VT-24 Hytron USA NOS 1940's (3.5ma and 3.6ma)
(!!!) (Best Value - Set of 10) 864=VT-24 Hytron USA NOS 1940's (10 for $319.99)
(!!) (Set of 4) JHY-6AK5 Hytron black plate NOS 1952 (test between 6-8ma unmatched) (4 for $39.99)
(!!!!) (Best Value Pair) 6SN7GTA GE "U" getter halo - side getter - copper grid posts NOS 1953-1954 (6.6/6.0ma and 6.0/6.8ma)
(!!!!) (Best Pair #2) JHY-6AK5 Hytron black plate NOS 1952 (8.9ma and 9.3ma)
(!!!!) (Best Value Pair) 6SN7GTA GE NOS "U" getter halo - side getter - copper grid posts 1953 (6.4/7.0ma and 7.0/6.4ma) 1-2% matched
(!!!!) (Recommended Pair) 6SN7GTA GE NOS "U" getter halo - side getter - copper grid posts 1952-1953 (6.6/7.8ma and 6.6/8.2ma) (close Gm) 1-3% matched
(!!!!) (Recommended Pair) 6SN7GTA GE "U" getter halo - side getter - copper grid posts NOS 1951-1953 (7.0/7.8ma and 7.8/7.2ma) (close Gm)
(!!!!) (Best Single) 6SN7GTA GE NOS "U" getter halo - side getter - copper grid posts 1952 (8.8/7.8ma)
