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(!!!!) (Single) EF89=6DA6 Telefunken Germany <> bottom NOS 1966 (7.0ma)
(!!!!) (Single) EF89=6DA6 Telefunken Germany <> bottom NOS 1966 faded printing (9.6ma)
(!!!!) (Single) JAN-6189W=12AU7 Philips by Sylvania NOS 1987 (8.2/8.8ma)
(!!!!) (Slightlly microphonic single) JAN-CHS-12AU7 Sylvania "black plates" with "D" getter halo NOS 1951 (9.2/9.8ma)
(!!!!) (Slightlly microphonic single) JAN-CHS-12AU7 Sylvania "black plates" with "D" getter halo NOS 1951 (9.8/10ma)
(!!!!) (Slightly microhonic Single) 5751 RCA Hewlett Packard black plates NOS 1968 (2.4/2.6ma)
(!!!!) (Slightly microphonic Single) CV4004=12AX7 Mullard box plates NOS 1981 (Gm=1400/1500) (0.8/1.1ma)
(!!!!) 12BH7A Westinghouse gray ribbed plates used/good "U" getter 1960 era (8.4/11ma)
(!!!!) 56 Arcturus Blue Balloon engraved base tests like new 1930's (5.0ma)
(!!!!) 5654=6AK5W GE Dumont NOS 1970's (10.2ma)
(!!!!) 6336A Tungsol branded Heintz and Kaufman 1960's (62/76ma) ***
(!!!!) UX-280 RCA Radiotron Balloon used/60% 1930 era some white oxide flakes inside tube (38/40 and 38/40)
(!!!) (#1 19J6 Pair) 19J6 RCA "U" getter halo NOS 1952 same date codes
(!!!) (#1 286A) 286A Western Electric "top printing" NOS 1942-1945 (7.0ma)
(!!!) (#1 56 National Union Pair) 56 National Union rebranded Western Electronics NOS 1940's (5.0ma and 5.2ma)
(!!!) (#1 6BX7GT RCA single) 6BX7GT RCA NOS 1961 (41/48ma)
(!!!) (#2 19J6 Pair) 9J6 RCA NOS 1950's - 1960's same internal plate structure, different getter halo shape
(!!!) (2nd Best Single) 27=127 Arcturus Blue Balloon tests like new 1930 era in white box (4.5ma)
(!!!) (Best Holland Single) ECF80=6BL8 Amperex Bugle Boy Holland NOS 1957 (14ma/11ma)
(!!!) (Best Mullard Single) ECF80=6BL8 IEC Mullard UK NOS 1966 (16ma/12ma) (Highest mA and Gm)
