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(microphonic tube) JRP-5687 Raytheon NOS black plates D getter NOS 1956 (36/41ma)
(microphonic tube) JRP-5687 Raytheon NOS black plates D getter NOS 1957 (31/31ma)
(!) (microphonic single tube) E182CC=7119 Philips SQ Holland NOS "O" getter halo 1963 (39.0ma/39.2ma)
(!!) (Single) E88CC=6922 Telefunken Germany <> bottom NOS 1969 (10/12.4ma) (mic grade)
(slightly microphonic tube) 12AT7 Brimar UK black plates "D" getter halo copper grid posts used/good 1955 era (7.2/8.4ma)
(slightly microphonic tube) 12AT7WA=CV455 Mullard NOS "curved D getter halo" copper grid posts 1959 perfect printing (8/9ma)
(slightly microphonic tube) 12AU7A RCA tall black ribbed plates "D" getter halo used/good 1950's (8.2/8.8ma)
(slightly microphonic tube) ECC81=12AT7 Mullard NOS "curved D getter halo" copper grid posts 1955 (9.2/10.6ma)
(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)
(slightly microphonic - good value) 5687 Raytheon black plates NOS "square" getter halo 1950's (37/39ma) (strong Ma and Gm)
(slightly microphonic) 6201=12AT7 RCA black plates NOS 1976 (11/12.4ma)
(slightly microphonic) 6211 GE used/good 1956 (4.8/4.9ma) 1-2% section balance
(slightly microphonic) 6922 Amperex PQ Holland 1962 low hours/like new (11.2/11.6ma)
(slightly microphonic) 6SN7GT Hytron NOS 1948 (7/8ma)
(slightly microphonic) 6SN7GTA GE NOS 1952 copper grid posts (7.4/10ma)
(slightly microphonic) 7062 Amperex Holland "PQ" NOS large "O" getter halo 1961 (8.6/9.0ma)
(slightly microphonic) 7062 Amperex Holland "PQ" NOS large "O" getter halo 1962 (6.8/7.0ma)
(slightly microphonic) JAN-7044 GE NOS 1974 (38.5/40.5ma)
