(!!!) (Best Single 1967) ECC82=12AU7 Philips Holland NOS 1967 (11.2/10.6ma) (same Gm)
(!!!) (Best Single) 5U4GB CBS NOS double "D" getters 1959 (59/40 and 60/40)
(!!!) (Best Single) 5U4GB CBS NOS double "D" getters 1959 (60/40 and 63/40)
(!!!) (Best Single) 5U4GB Hytron NOS "O" getter halo 1960 era (59/40 and 60/40)
(!!!) (Best Single) CK5687WA Raytheon black plates "O" getter like new 1960 (35/38ma)
(!!!) (Best Single) EL84 IEC Mullard NOS "D" getter made in Wien, Austria 1958 (47ma) (same sound as Philips Holland)
(!!!) (Best Value Pair) EL84 Philips Holland NOS made in Wien, Austria NOS 1966-1967 (54.4ma and 53.5ma)
(!!!) (Best Value Single) ECC82=12AU7 Philips Miniwatt Holland ribbed plates used/like new 1963 (9.4/9.8ma)
(!!!) (Good Value Pair) JAN-6384 Cetron by Tungsol used/very good 1979 (66ma and 63ma)
(!!!) (Good Value Single) JAN-5687WA Raytheon bronze plates "O" getter like new 1960 era (33.5/33ma)
(!!!) (Recommended Pair) JEA-6094 Bendix NOS 1959-1961 pins gently cleaned (57.5ma and 59ma) (matched on Amplitrex)
(!!!) (Recommended Single 1962) ECC83=12AX7 Mullard Webcor ribbed plates used/very good 1962 (161 series) in white box (1.0/1.1ma and Gm=1600/1600)
(!!!) (Recommended Single) 12AT7=ECC81 Mullard shiled logo used/tests like new 1963 (15.8/14.8ma)
(!!!) (Recommended Single) 12AX7 RCA "tall gray plates" and "D" getter halo branded Raytheon used/good 1950's (Gm=1900/2100) (1.3/1.7ma)
(!!!) (Recommended Single) 5691 RCA red base black plates NOS 1957 (2.0/2.1ma)
(!!!) (Recommended Single) 5691 RCA Red Base black plates used/good 1959 (2.3/2.0ma)
(!!!) (Recommended Single) ECC83=12AX7 Mullard Webcor ribbed plates used/good 1962 (161 series) in white box (1.0/0.7ma and Gm=1600/1400)
(!!!) 6SN7GTB Westinghouse black plates copper grid posts "D" getter 1950's (7.2/8.4ma)
(!!) (#1 5687 Tungsol used 1961) 5687WA Tungsol bronze plates "O" getter halo used/very good 1961 (33.4/34.8ma)
(!!) (Best CBS Single) 6SN7GTB CBS black plates side-getter NOS, the same shape as Sylvania 6SN7GTB 1959 (8.0/8.2ma)