(!!!!) (Recommended Pair) 6SN7GTB Sylvania chrome top gray plates 1950's used/very good (9.6/9.0ma and 8.6/8.2ma) (Gm like new)
(!!!!) (Recommended Single) 12BH7A Sylvania Hammond gray oval plates "D" getter halo used/like new 1959 (10.2/10.6ma)
(!!!!) (Recommended Single) 12BH7A Sylvania Hammond gray oval plates "D" getter halo used/like new 1959 (9/9ma)
(!!!!) (Single 1950's) 12BH7A RCA branded Westinghouse narrow black plates NOS "U" getter mid-1950's (10/7.8ma) (1st series made)
(!!!!) (Single 1960) 12BH7A RCA "D" getter like new 1960 (9.4/8.8ma) (same Gm)
(!!!) (Best Pair) 6SL7GT RCA NOS black plates gray coated glass 1959-1960 (2.2/2.3ma and 2.2/2.3ma)
(!!!) (Best Single 1956) JG-5670WA GE triple mica with D getter NOS 1956 (7.8/7.0ma)
(!!!) (Best Single 1958) JTL-5687 Tungsol black plates "U" getter like new 1958 (37.5/41.5ma)
(!!!) (Best Single) 12AY7 GE "GRAY BOX PLATES" and "D" getter NOS 1953 (3.3/3.1ma)
(!!!) (Best Single) 310A Western Electric large punch plate low hours/tests like new 1962 (6.5ma) (highest mA and Gm)
(!!!) (Best Single) CK5687WA Raytheon black plates "O" getter like new 1960 (35/38ma)
(!!!) (Best Single) JG-5670WA GE triple mica with D getter halo NOS 1956 (6/6ma)
(!!!) (Best Sylvania 1955) 12AX7 Sylvania pinched black plates "square" getter halo NOS 1955 (Gm=1500/1700, 1.0/1.1ma)
(!!!) (Good Value Single) JAN-5687WA Raytheon bronze plates "O" getter like new 1960 era (33.5/33ma)
(!!!) (Recommended Pair) 10=VT-25 SYLVANIA NOS 1940's large getter flashing (27.0ma and 28.2ma) (Same Gm)
(!!!) (Recommended Pair) JTL-5654=6AK5W Tungsol gray plate "D" getter used/good 1956-1958 (6.4ma and 6.5ma)
(!!!) (Recommended Single) 6SN7GTB Sylvania NOS 1960's (7.2ma and 6.6ma)
(!!!) (Recommended Single) 6SN7GTB Sylvania used/tests like new 1960's (8.2ma and 7.6ma)
(!!!) (Recommended Single) JHS-6AN8A Sylvania NOS 1966 (13.6/16.5ma)
(!!!) (Single 1954) JG-12AX7 GE gray ribbed plates "U" getter 1954 used/tests like new (Gm=1500/1600 and 1.1/1.1ma)
