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(!!!!) (Single) 5692 RCA RED BASE black plates used/good 1953 (7/8ma) (Schiit Saga+)
(!!!!) (Single) 6080 GE black plates NOS 1980 era (86ma/72ma)
(!!!!) (Single) 6CG7 Tungsol NOS 1960 era black shield between plates - pin #3 slightly shorter (8.6ma/10ma)
(!!!!) (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)
(!!!!) 12BH7A Westinghouse gray ribbed plates used/good "U" getter 1960 era (8.4/11ma)
(!!!!) 5998 Tungsol IBM black plates used/very good 1960 (80/96ma) (close Gm)
(!!!) (Best Overall Single) 2A3 RCA black plates NOS 1940's (114ma) (high Gm)
(!!!) (Best Pair #1) 2A3 RCA and RCA branded HYTRON black plates D getter halo 1945 era NOS (105ma and 107ma) (sound excellent in SET amp)
(!!!) (BEST PAIR #1) 6AN8A RCA NOS 1969 (17.4/12.6ma and 18.6/13.4ma)
(!!!) (Best Pair) JRC-5751 RCA NOS black plates double mica 1962 (2.7/2.3ma and 2.7/2.9ma) (similar to Command Series)
(!!!) (Best Pair) JRP-5687WA and JAN-5687WA Raytheon bronze plates tests like new 1964 era faded printing (33.4/36.4ma and 33.5/33.0ma)
(!!!) (BEST PRICE) 12AU7A GE used/good 1969 - 1980 (4 for $29.99)
(!!!) (BEST PRICE) 12AU7A GE used/good 1971 - 1978 (4 for $29.99)
(!!!) (Best SIngle 1950's) 12AT7 Brimar UK black plates "O" getter halo NOS late 1950's (11.6/12.8ma)
(!!!) (Best Single 1953) JG-5814 GE NOS "square getter halo" and "short wide ribbed dark black plates" 1953 in white box (11.0/12.5ma)
(!!!) (Best Single) 12AT7 Brimar UK branded Knight by Mullard black plates "O" getter NOS 1966 (9.2/10.2ma)
(!!!) (Best Single) 12AZ7 Tungsol black plates "D" getter halo NOS 1955 (12ma/14ma)
(!!!) (Best Single) 5BK7A RCA branded Raytheon black plates NOS 1960's (14/14.3ma) (Highest Ma and Gm)
