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(!!) (BEST PAIR #2) 6H6 GE NOS 1972-1974 (46-48/40 and 45-48/40)
(!!) (BEST PAIR #3) 6H6 GE NOS 1970-1977 (44-47/40 and 44-47/40)
(!!) (Best Pair) 6AG7 RCA NOS 1960's (27ma and 27.5ma)
(!!) (Best Pair) 6SH7 GE metal can NOS 1976 (11.5ma and 11.6ma) **
(!!) (BEST PAIR) 6V6 GE metal can NOS 1976 (41.5ma and 42ma) 1-3% matched
(!!) (BEST PRICE) 6SR7 US Brands metal can NOS (4 tubes for $14.99)
(!!) (Best Quad #2) 6SH7 GE metal can NOS 1976 (8.6, 9, 9, 9mA)
(!!) (Best Single) 6SC7 GE NOS 1955 (2.2/2.1ma)
(!!) (Good Value PAIR) 1619 RCA NOS 1942-1943 (44ma and 45.2ma)
(!!) (Pair) 6SF5 RCA metal can NOS 1948-1957 (1.2ma and 1.0ma)
(!!) (PAIR) 6V6 GE metal can NOS 1976 (34.5ma and 34.0ma) 1-5% matched
(!!) (PAIR) 6V6 GE metal can NOS 1976 (37ma and 38ma)
(!!) (Recommended Pair) 6AG7 RCA NOS 1960's (30.6ma and 32ma)
(!!) (Recommended Pair) 6AG7 RCA NOS 1960's same date codes (27.5ma and 29.2ma)
(!!) (Recommended Pair) 6AG7Y RCA brown bottom NOS 1958-1964 (27.8ma and 28.8ma)
(!!) (Recommended Pair) 6SH7 GE metal can NOS 1958 and 1970 (10.3ma and 11ma)
(!!) (Recommended Pair) 6SH7 GE metal can NOS 1976 (12ma and 13ma) **
(!!) (Recommended Pair) 6SK7 Sylvania NOS 1950 era (9.2ma and 9.0ma)
(!!) 6SH7 GE metal can NOS 1942-1945 (11.6ma)
(!!) 6SH7 GE metal can NOS 1942-1945 (12.5ma)