(!!!!!) (Best Sylvania pair) JAN-CHS-6SN7WGT Sylvania chrome top NOS 1952 (7.6/7.8ma and 7.2/8.6ma) (low noise, detailed, good extension) (High Gm)
(!!!!) (2nd Best Pair) JHY-6AK5 Hytron black plate NOS 1952 (9.8ma and 9.4ma) 1-5% matched
(!!!!) (Best Overall Pair) JHY-6AK5 Hytron black plate NOS 1952 (8.1ma and 8.1ma) 1-2% matched
(!!!!) (Good Value Single) 6SN7GTA GE "U" getter halo used/good 1954 (6.0/6.4ma)
(!!!!) (Recommended Pair) 5V4G RCA NOS 1948-1950 some stains on glass (57-58/40 and 58-58/40)
(!!!!) (Recommended Pair) JHY-6AK5 Hytron black plate NOS 1952 (7.3ma and 7.6ma)
(!!!!) (Recommended Pair) JHY-6AK5 Hytron black plate NOS 1952-1953 (7.5ma and 7.6ma)
(!!!) (Best Pair) 12BA6 Sylvania NOS 1960's (10.4ma / 10.6ma) 1-3% matched
(!!!) (BEST PAIR) 7AF7 Sylvania NOS gray round plates NOS 1950-1958 (8.5/8.7ma and 9.2/9.2ma) 1-5% matched (same Gm)
(!!!) (Good Single) 274B Western Electric printed base NOS 1959 reboxed (53/40 and 60/40)
(!!!) (Recommedned Pair) 6B4G Sylvania NOS 1940's, 1 tube rebranded RCA - same build (106mA and 107mA)
(!!!) (Recommended Pair) 12BA6 Sylvania NOS 1960's (9.8ma / 10ma)
(!!!) (Recommended Pair) JHY-6AK5 Hytron black plate NOS 1952 (5.8ma and 5.8ma)
(!!!) (Recommended Pair) JHY-6AK5 Hytron black plate NOS 1952 (8.0ma and 8.2ma)
(!!!) (Recommended Pair) JTL-5654=6AK5W Tungsol gray plate "D" getter used/good 1956-1958 (6.4ma and 6.5ma)
(!!!) 418A Western Electric NOS 1952 original box (34ma)
(!!!) 418A Western Electric NOS 1952 original box (41ma)
(!!!) 83 Westinghouse low hours/tests like new 1948 small amount of graphite flaked off one plate (62/40 and 63/40)
(!!) (#2 83 single) JAN-CRC-83 RCA NOS 1952 some black graphite flakes inside tube flaked off plate (58/40 and 60/40)
(!!) (Best Pair) JAN-CHS-6SL7WGT Sylvania brown base "square getter halo" like new faded printing (2.4/2.6ma and 2.4/2.4ma) 1-3% matched