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(!!) (Best Value Pair) 12AU7A Sylvania NOS 1970-1975 (9.0/9.1ma and 9.0/8.8ma) (Close Gm)
(!!) (Best Value Pair) JAN-CG-6AC7 GE 1953 test like new (10.4ma/10.6ma)
(!!) (Best Value Single) E88CC=6922 Siemens Halske Germany "O" getter halo used/very good 1963 (11.5/12.6ma) (mic grade)
(!!) (Best Value Single) EF14 Telefunken Germany used/good 1950 (12.5ma)
(!!) (Best Value Single) JAN-5670W GE NOS 1986 (10/7.5ma)
(!!) (Best Value Single) JAN-5687WA Raytheon bronze plates used/tests like new 1969 (41.5/43.5ma) (High Ma and Gm)
(!!) (Best Value Single) JAN-CRP-5687 Raytheon black plates used/very good around 1960 (33.5/37.6ma)
(!!) (Good Value Pair) 6021=CV3986 Mullard UK Mitcham plant NOS 1971 original boxes (4.8/6.3ma and 4.6/6.5ma)
(!!) (Good Value Single) 12AZ7 Tungsol black plates "U" getter halo NOS 1950's (7.5ma/7.5ma)
(!!) (Good Value Single) 5687 Tungsol Hewlett Packard bronze plates "O" getter like new 1960 (32.5/33.7ma)
(!!) (Good Value Single) 6DJ8 EI YUGO branded Siemens NOS 1979 (16.2/17.2ma)
(!!) (Good Value Single) JRP-5687WA Raytheon bronze plates used/good early 1960's (33/31.6ma)
(!!) (Good Value) 12AT7=ECC81 Siemens Halske Germany used/strong 1964 (8.2ma/12.2ma)
(!!) (Pair) 37 Sylvania 1940 era used/good no printing (6.6ma and 6.5ma) (Same Gm) 1-2% matched
(!!) (PAIR) 6CW4 GE NOS 1980-1981 (88/60 and 91/60)
(!!) (Pair) 6SF5 RCA metal can NOS 1948-1957 (1.2ma and 1.0ma)
(!!) (Pair) 6SJ7 GE metal can NOS 1977 (2.4ma and 2.3ma) (same Gm)
(!!) (Read Review) 6SH7GT Ken Rad 1950's rebranded Raytheon NOS 1970 (11.2ma and 11.2ma) (close Gm)
(!!) (Recommeded Pair) 6BX7GT GE branded NOS "D" getter 1958 - 1 tube branded RCA (72ma/95ma and 92/87ma) (highest mA and Gm)
(!!) (Recommended Pair) 12AZ7=12AZ7A GE branded Admiral/Westinghouse black plates NOS 1960 (9.0/9.4ma and 9.2/8.0ma) (McIntosh MC275)
