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(!!!) (Best Single) 6350 Sylvania Hewlett Packard black plates "D" getter halo tests like new 1950's (12.8/12.6ma) (Same Gm) 1-2% section balance
(!!!) (Best Single) 6BQ5 Sylvania black plate NOS 1950's (55.5ma)
(!!!) (Best Single) CK5687WA Raytheon black plates "O" getter like new 1960 (35/38ma)
(!!!) (Best Single) EL84 Philips Miniwatt Heerlen Holland NOS 1961 (59ma)
(!!!) (BEST SINGLE) GZ32 Miniwatt Dario France NOS 1955 era (63/40 and 63/40) small rattle inside base
(!!!) (Best Single) JTL-5687 Tungsol bronze plates "U" getter halo NOS 1959 (39/40ma) 1-3% section balance
(!!!) (Good Value Pair) JAN-6384 Cetron by Tungsol used/very good 1979 (66ma and 63ma)
(!!!) (Holland) GZ34=5AR4 Holland used/strong 1961 no printing (58/40 and 58/40) 1% section balance (f33 series)
(!!!) (Recommended Single) 5691 RCA Red Base branded Westinghouse black plates used/good 1960 (1.8/2.1ma)
(!!!) (Single) 5U4GB CBS NOS double "D" getters 1958 (61/40 and 70/40)
(!!!) (Single) CK-5687 Raytheon black plates "O" getter like new 1960 (30/33.5ma)
(!!!) (Single) EL84 Mullard UK "D" getter used 1956 (36ma)
(!!!) (Single) EL84 Mullard UK used/strong 1966 (52.5ma)
(!!!) 6SN7GTB Westinghouse black plates copper grid posts "D" getter 1950's (7.2/8.4ma)
(!!) (Best CBS Single) 6SN7GTB CBS black plates side-getter NOS, the same shape as Sylvania 6SN7GTB 1959 (8.0/8.2ma)
(!!) (Best Pair 1981) 412A Western Electric NOS "O" getter halo 1981 (53-53/40 x 2 tubes)
(!!) (Best Pair) 412A Western Electric NOS "D" getter halo 1959 (51-52/40 x 2 tubes)
(!!) (Best RCA Single) JRC-6189=12AU7WA RCA black plates "D" getter NOS 1957 (8.6/9.0ma)
(!!) (Best Single) 5687 Tungsol rebranded CBS black plates "U" getter NOS 1950's (38/48ma)
