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(!!!) (Recommended Single) 6BQ7A RCA black plates NOS 1962 (10/14ma)
(!!!) (Recommended Single) 6BX7GT GE "O" getter gray plates 1963 (71/76ma)
(!!!) (Recommended Single) 6BX7GT GE branded Westinghouse "O" getter gray plates 1960's (43/48ma)
(!!!) (Recommended Single) 6BX7GT GE branded Westinghouse black plates NOS "O" getter 1962 (71/79ma)
(!!!) (Recommended Single) 6BZ7 RCA black plates "U" getter NOS 1957 (9.0/9.4ma)
(!!!) (Recommended Single) 6EU7 RCA NOS 1967 (50/32 and 46/32)
(!!!) (Recommended Single) 6EU7 RCA NOS 1967 (53/32 and 60/32)
(!!!) (Recommended Single) 6EU7 RCA NOS 1971 (53/32 and 45/32)
(!!!) (Recommended Single) 6KG6A RCA JAPAN NOS original boxes 1970's (142ma)
(!!!) (Recommended Single) 6KG6A Westinghouse JAPAN NOS 1973 (116ma)
(!!!) (Recommended Single) 6L6GC Sylvania clear top NOS 1960's (85ma)
(!!!) (Recommended Single) 6SN7GTB Westinghouse gray plates NOS 1965 (8.6/7.4ma)
(!!!) (Recommended Single) 866A RCA tests like new 1956 (58/40)
(!!!) (Recommended Single) C-299=UV-99 Cunningham NOS 1920's (2.3ma) (highest Ma) (UV have small pins) (strong Gm)
(!!!) (Recommended Single) C-299=UV-99 Cunningham NOS 1920's with tube data sheet (2.4ma) (highest Ma) (UV have small pins) (strong Gm)
(!!!) (Recommended Single) CV491=12AU7=ECC82 Brimar England NOS ribbed plates 1974 (9.4/9.2ma)
(!!!) (Recommended Single) CV5358=6DJ8 Mullard UK used/good 1969 some stains on glass (17.2/17.8ma) (High Ma and Gm)
(!!!) (Recommended Single) EC92=6AB4 Siemens Halske NOS 1967 (9.2ma)
(!!!) (Recommended Single) EF94=6AU6 Tungsol used/tests like new 1957 (10ma)
(!!!) (Recommended Single) ER-230=30 Raytheon 1930's used/like new (4.1ma and Gm=800)
