(!!!!!) (Best Overall Pair) 6FQ7 RCA clear top NOS 1960's - 1970's 1-2% matched (8.4/8.6ma and 8.2/8.4ma) (STAX, MARANTZ, CONRAD JOHNSON)
(!!!!!) (Best Pair) 6FQ7 RCA clear top NOS 1960's 1-2% matched (7.8/7.8ma and 7.8/8.0ma) (STAX, MARANTZ, CONRAD JOHNSON)
(!!!!!) (Best RCA Pair) 6FQ7 RCA clear top NOS 1960's - 1970's (7.6/9.0ma and 7.8/8.8ma) (STAX, MARANTZ, CONRAD JOHNSON)
(!!!!!) (Recommended GE Quad) 6FQ7 GE NOS 1960's - 1970's same date codes (1 Quad) (CJ, Marantz, Stax)
(!!!!) (~ 2nd Best GE Pair ~) 6FQ7 Zenith by GE NOS 1977 closely matched
(!!!!) (~ Best GE Pair ~) 6FQ7 Zenith by GE NOS 1970 1-3% matched
(!!!!) (~ Recommended Pair ~) 6FQ7 RCA clear top NOS 1960's (7.2/7.4ma and 7.2/7.8ma) (STAX, MARANTZ, CONRAD JOHNSON)
(!!!) (~ Best GE Pair ~) 6FQ7 GE NOS 1960's - 1970 1-2% matched (7.8/8.0ma and 7.6/7.8ma)
(!!!) (~ Best GE Pair ~) 6FQ7 GE NOS 1960's - 1970 1-2% matched (8.4/8.8ma and 8.4/8.4ma)
(!!!) (~ Good Value Pair ~) 6FQ7 Sylvania NOS 1970's same build
(!!!) (~ Recommended Pair ~) 6FQ7 Sylvania NOS 1970's
(!!) (#1 6CG7 RCA) 6CG7 RCA gray shield between plates NOS 1960 era, scratch near top of glass (7.6/8.8ma)
(!!) (#1 6FQ7 RCA clear top) 6FQ7 RCA clear top NOS 1960's (7.1/7.6ma)
(!!) (#1 6FQ7 Sylvania pair) 6FQ7 Sylvania NOS 1960's same build
(!!) (#2 6FQ7 GE Pair) 6FQ7 GE branded RCA NOS 1970's
(!) (#1 6CG7 Single) 6CG7 GE NOS "U" getter 1959 (8.6ma/9.4ma) and (strong Gm)
(!) (Best Single) 6CG7 Sylvania branded Philco NOS chrome center shield 1960 (7.8/8.2ma) (strong Gm)
(!) 6CG7 GE black plates rebranded Arcturus "U" getter 1950's (10.4ma/12ma) (strong Ma and Gm)
(!) 6CG7 Sylvania branded Philco Black Plates NOS chrome shield "o" getter halo 1959 (10.2ma/8.8ma)
