(!!!!!) (BEST VALUE PAIR) 6SL7GT GE branded RCA coin-base 1970's series filament - round silver/chrome plates (1.8/1.8ma and 2.0/1.8ma) 1-5% matched
(!!!!) (Best GE Pair) 6FQ7 GE NOS 1976-1983 (7.2/8.2ma and 7.6/8.6ma)
(!!!!) (Best Pair) 1L6 Sylvania NOS 1950 same date codes (20/16 and 19/16)
(!!!!) (Best Pair) 6FQ7 Zenith by GE NOS 1977 (7.2/8.0ma and 7.0/7.8ma)
(!!!!) (Recommended GE Pair) 6FQ7 Zenith by GE NOS 1977 1-3% matched (7.0/7.6m and 6.8/7.5ma)
(!!!!) (Recommended Pair) 6FQ7 Zenith by GE NOS 1977 (6.2/8.0ma and 6.0/8.4ma)
(!!!!) (Recommended Pair) 6FQ7 Zenith by GE NOS 1977 (6.5/10.6ma and 6.7/9.2ma)
(!!!) (Best Overall Pair) 6JS6C Sylvania Zenith and Sylvania NOS same build (104ma and 107ma)
(!!!) (Recommended Mullard Single) 6EU7 Amperex Mullard UK NOS 1970 (46/32 and 48/32)
(!!!) (Recommended Pair) 6FQ7 GE NOS 1973-1974 (6.5/8.4ma and 7.0/8.0ma)
(!!!) (Recommended Single) 6EU7 Mullard UK branded EICO used/like new 1963 (45/32 and 49/32)
(!!!) 12BH7A RCA branded Zenith NOS 1970 era (10/13.2ma)
(!!!) 1L6 Sylvania branded GE NOS 1973 original box (115/60)
(!!!) 1L6 Sylvania NOS 1970 era (112/60)
(!!) (Best Overall Pair) 5Y4G Sylvania NOS 1951 (57-52/40 and 56-52/40) (rare)
(!!) (BEST PAIR) 5Y4GA RCA NOS 1969 same date codes (52-56/40 and 52-57/40)
(!!) (BEST PAIR) 5Y4GA Sylvania NOS 1960's same date codes (54-59/40 and 53-58/40)
(!!) (Best RCA Pair) 5Y4G RCA NOS 1946 (51-53/40 and 52-54/40) (rare) closely matched
(!!) (Recommended Pair) 6JS6C GE Realistic and GE NOS 1970's - 1981 (70ma and 76ma)
(!!) 6U5 Tungsol NOS 1948 bright eye (1 in stock)
