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(!) (READ REVIEW) CV1377=GZ34 Mullard Blackburn UK NOS 1976
(!) (Single) 7189 Mullard UK used/strong 1962 (43.8ma)
328A Western Electric "small punch" NOS 1953 (5.5ma)
329A Western Electric NOS 1966 (1 Pair: 34.5ma and 38ma)
5687WA GE used/tests like new 1970's (44/45ma) (highest Ma and Gm)
5R4GYB RCA NOS 1970 (53/40 and 52/40)
5R4GYB RCA NOS 1970 slightly tilted glass (52/40 and 53/40)
5R4GYB RCA used/strong 1970 (52/40 and 54/40)
5R4GYB RCA used/very good 1964 (51/40 and 54/40)
6DJ8 Amperex Bugle Boy Holland used/like new 1964 (read review)
6DJ8 Telefunken Germany <> bottom used/good 1967 (13.5/14.0ma)
6SJ7 GE used/like new 1966 (3.3ma)
6SJ7 RCA metal can like new 1964 (3.5ma)
6SJ7 RCA used/good 1940's (2.8ma)
6SJ7Y=VT-116B RCA used/tests like new 1943 (3.8ma)
6SJ7Y=VT-116B Sylvania brown bottom like new 1940's (3.7ma)
7687 Sylvania NOS 1962 (sold out)
E83F=6689 Philips Miniwatt SQ Holland NOS 1964 (10.5ma)
E83F=6689 Siemens Holland NOS 1963 (10.6ma)
E83F=6689 Siemens made in Holland NOS 1966 (8.5ma)
