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(slightly microphonic tube) 12AU7A RCA tall black ribbed plates "D" getter halo used/good 1950's (8.2/8.8ma)
(slightly microphonic tube) JRC-12AU7 RCA tall black ribbed plates "D" getter halo tests like new 1950's (9.6/10.4ma)
(slightly microphonic tube) JRP-5687 Raytheon NOS black plates D getter NOS 1956 (40.5/45.5ma)
(slightly microphonic tube) JRP-5687 Raytheon NOS black plates D getter NOS 1957 (34.5/36.5ma)
12AZ7 GE black plates "D" getter halo NOS 1955 (11ma/7.5ma)
12X4 RCA "D" getter NOS 1962 (46/40 and 47/40)
12X4 RCA "O" getter NOS 1968 (44/40 and 46/40)
12X4 RCA "O" getter NOS 1968 (46/40 and 47/40)
12X4 RCA "o" getter NOS 1970 (44/40 and 46/40)
5879 RCA triple mica "D" getter halo used/tests like new (1.7ma)
5879 RCA triple mica "O" getter halo used/tests like new 1962 (1.5ma)
5AS4A Westinghouse "D" getter halo 1960-1965 (58/40 and 58/50)
5U4GB GE ITT NOS 1960's "D" getter (60/40 and 62/40)
6AU8 Raytheon black plates "U" getter halo NOS 1955 (2 in stock)
6AU8 RCA black plates "D" getter halo NOS 1950's (5 in stock)
6CS7 Tungsol NOS black plates 1960's (21/10ma) (internals like Sylvania)
6FW8 RCA "D" getter NOS around 1960
6SN7WGT Raytheon brown base black ribbed plates "D" getter halo 1959 used/good (6.2/8.4ma)
7027A RCA metal base gray plate NOS 1960 (74.2ma)
7027A Sylvania used/75% (58.5ma)
