(!!!!!) (BEST VALUE PAIR) 6L6GC RCA Black Plate used/good 1970-1975 (66.5ma and 67.5ma) (Gm like new)
(!!!!) (Best Pair) 56 Sylvania black plate NOS 1940's branded Western Electronics 1940's (6.4ma and 6.5ma) (Highest Ma and Gm)
(!!!!) (Recommended Pair) 807 RCA black plate NOS 1940's same build (60ma and 64ma)
(!!!!) (Recommended Single) 6L6GC RCA black plates branded Westinghouse like new double "D" getters 1960 era (78ma)
(!!!) (Best 12AT7WC Single) JAN-12AT7WC Sylvania black plates NOS 1978 (9/10ma)
(!!!) (Best Overall Pair) 6V6GTA Tungsol black plate NOS around 1960 (54ma and 56ma)
(!!!) (Best Pair) 56 Sylvania black plate NOS 1943 (6.3ma and 6.2ma)
(!!!) (Best Pair) 6973 RCA NOS same build 1960-1970 (40ma and 40ma)
(!!!) (Best Value Black Plate single) 6L6GC RCA Conn black plate used/good 1962 (67ma) (Gm like new)
(!!!) (Good Value Single) 6L6GC RCA black plate NOS 1965 broken center guide pin (76.2ma)
(!!!) (Recommended Pair) 6005W Sylvania JAN black plate clear glass NOS 1971 (45.8ma and 46.6ma)
(!!!) (Recommended Pair) 6005W Sylvania JAN black plate clear glass NOS 1971-1972 (41ma and 41.2ma) 1% matched
(!!!) (Recommended Pair) 6AQ5A Sylvania black plate NOS 1970's (48.5ma and 49.5ma)
(!!!) (Recommended Pair) 6AQ5A Sylvania black plate NOS 1970's (50.5ma and 52ma)
(!!!) (Single) 6J5G Sylvania engraved base black oval plate used/very good 1930's (8.0ma)
(!!) (#3 56 Sylvania Pair) 56 Sylvania black plate NOS 1940's branded Western Electronics 1940's one tube has slightly tilted glass (5.2ma and 5.5ma)
(!!) (Best Pair) 76 Sylvania black plate NOS mid-1940's (5.2/5.3ma) 1-2% matched
(!!) (Best Pair) EL822 Mullard black plate NOS 1970-1973 (43.2ma and 44.4ma)
(!!) (Pair) EL822 Mullard black plate NOS 1970-1973 (36.0ma and 37.8ma)
(!!) (Pair) EL822 Mullard black plate NOS 1973-1974 (40ma and 41ma)