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(!!!!!) (Best Pair) ECC801S=12AT7 Telefunken Germany <> bottom NOS triple mica 1965 and 1966 (9.6/9.6mA and 9.5/9.2mA) (1-3% matched) (transparent and open)
(!!!!) (Best Sound for the money) 6550 Tungsol branded RCA NOS and used/like new vented gray plate 1965 and 1974 (130ma and 134.5ma) (close Gm)
(!!!!!) (Best Sound for the money) 6L6GC RCA black plate used/test like new 1969 (72.5ma and 71.0ma) (Same Gm) (Fender)
(!!!!) (Best Pair #1) ECC83=12AX7 BRIMAR EDISWAN VALVE England gray ribbed plates "o" getter NOS 1960's (1.6/1.5ma and 1.5/1.7ma)
(!!!!!) (Best Overall Pair) EF806S=EF86 Telefunken Germany <> bottom NOS 1965 (4.0mA and 3.9ma) (Same Gm) (Neumann U67, Shindo, Lawson)
