(!!!!!) (#1 12AX7 Brimar Matched Quad 1960's) CV4004=12AX7 Brimar England narrow ribbed plates NOS 1960's matched quad (recommended for phono stages) 1-2% matched
(!!!!!) (#1 5R4GB Matched Quad) 5R4GB GE black base NOS 1960's
(!!!!!) (#1 6201 Mullard Pair) 6021=CV3986 Mullard UK Whyteleafe plant NOS 1972 original boxes (5.2/5.3ma and 5.1/5.4ma) (matched on Amplitrex) 1% matched
(!!!!!) (#2 12AX7 Brimar - Best Overall Pair) 12AX7=CV4004 BRIMAR England tall narrow ribbed plates NOS 1960's (1.2/1.5ma and 1.3/1.5ma)
(!!!!!) (#2 5687WB Sylvania Quad) 5687WB Sylvania black plates NOS 1980 (matched quad)
(!!!!!) KT88 GEC UK used/very strong 1960's (137ma)
(!!!!) (#1 12AX7 Mazda Pair 1957 - Best Overall) 6L13=12AX7 Mazda Valve long plates NOS made by Mullard Blackburn UK 1957 (f91 series) (highest Ma and Gm)
(!!!!) (#1 12AX7=ECC803S SINGLE) ECC803S=12AX7 Telefunken Germany <> bottom NOS 1966 1-2% section balance (Gm=1850/1900) (1.5/1.6ma) (Highest Ma and Gm)
(!!!!) (#1 5670W GE PAIR) 5670W GE NOS 1971-1979 1-2% matched (highest Ma and Gm)
(!!!!) (#1 5670W GE PAIR) 5670W GE NOS 1972-1977 1-2% matched (highest Ma and Gm)
(!!!!) (#1 5687WB Sylvania Pair) 5687WB Sylvania black plates NOS 1980 (High Ma and Gm) 1% matched
(!!!!) (#1 5998 Tungsol) 5998=2399 Burroughs by Tungsol black plates NOS 1965 (83ma/106ma) (High Gm)
(!!!!) (#1 6021 Mullard Pair 1972 - Best Sound) 6021=CV3986 Mullard UK Whyteleafe plant NOS 1972 original boxes (5.0/5.4ma and 4.9/5.7ma) (matched on Amplitrex)
(!!!!) (#1 6021 Mullard Pair) 6021=CV3986 Mullard UK Whyteleafe plant NOS 1972 original boxes (5.2/6.0ma and 5.2/6.3ma) (matched on Amplitrex)
(!!!!) (#1 6085 Pair - Best Overall) E80CC=6085 Philips Miniwatt SQ Holland 1966 (matched on Amplitrex) 1-2% matched
(!!!!) (#1 6106 Single) 6106 Bendix 1950's NOS rebranded 5Y3WGTA Heintz & Kaufman in 1970's (66/40 AND 67/40) 1-2% section balance
(!!!!) (#1 6AN8 PAIR - BEST SOUND) 6AN8 Sylvania black plates coated glass NOS large "D" getter 1954 matched on Amplitrex
(!!!!) (#1 6DJ8 PAIR) 6DJ8 Siemens Halske Germany NOS 1970-1971 1-3% matched
(!!!!) (#1 6U8 Telefunken Pair - Best Overall Sound) ECF82=6U8 Telefunken <> bottom NOS original boxes 1969 factory sealed (matched on Amplitrex)
(!!!!) (#1 7308 Amperex USA Pair) JAN-7308 Amperex USA NOS 1971-1972
