(!!!!) (Best GE Pair) 6N7 GE metal can NOS 1957 (3.0/2.7ma and 2.9/2.8ma) 1-3% matched
(!!!!) (Best Pair) 6N7 GE metal can NOS 1954-1955 (3.3/3.1ma and 3.1/3.1ma) 1-2% matched
(!!!!) (BEST PAIR) 6SQ7 RCA NOS 1953 (1.1ma and 1.2ma)
(!!!) (1 Pair) 6J7 RCA Radiotron used/good 1940's (1.7ma and 1.8ma)
(!!!) (1 PAIR) 6V6 GE metal can NOS 1976 (36.6ma and 36.8ma) 1-2% matched
(!!!) (1 set of 10) 6V6 GE metal can NOS (10 for $148.88)
(!!!) (Best Overall Pair) 6L6 RCA metal can NOS mid-1940's (75ma and 73ma)
(!!!) (Best Pair) 5Z4 Raytheon NOS 1950 (54/40 and 54/40 x 2 tubes)
(!!!) (Best Pair) 6AG7 RCA NOS 1950-1951 (31.5ma and 32.0ma)
(!!!) (Best Pair) 6C5 RCA / RCA Victor metal can NOS 1950-1951 (8.2ma and 8.8ma)
(!!!) (Best Pair) 6SK7 GE NOS 1969 (9.0ma and 8.8ma)
(!!!) (Good Value Pair) 6SC7 GE metal can NOS 1977 (1.6/1.9ma and 1.6/1.9ma) 1% matched
(!!!) (Pair) 6C5 Raytheon metal can NOS 1950 (7ma and 8ma)
(!!!) (Recommended Pair) 1619 RCA NOS 1960-1964 (52ma and 53ma)
(!!!) (Recommended Pair) 6F6 RCA metal can NOS 1963-1968 (35.6ma and 38.8ma)
(!!!) (Recommended Pair) 6SC7 GE metal can NOS 1969-1977 (1.7/1.9ma and 1.6/1.8ma) (same Gm)
(!!!) (Recommended Pair) 6SC7 GE metal can NOS 1977 (1.7/1.7ma and 1.7/1.8ma) 1-2% matched
(!!!) (Recommended Pair) 6SC7 GE NOS 1977 (1.7/2.1ma and 1.8/2.1ma) 1-3% matched
(!!!) (Recommended Pair) 6V6 Sylvania metal can NOS 1970 era (39.2ma and 39.3ma)
(!!!) (Recommended Pair) 6V6 Sylvania metal can NOS 1970 era (42.6ma and 42.8ma)
