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(!!!!) (Good Value Pair) 6FQ7 Philips by Sylvania NOS 1980 era (6.2/6.0ma and 6.0/6.2ma)
(!!!) (Recommended Pair) 6FQ7 Sylvania NOS 1970's same build (6.4/6.8ma and 6.4/6.4ma)
(!!!) (Best Pair 1950's) 6CG7 GE NOS "U" getter 1958-1959 (6.2/7.6ma and 6.8/7.4ma) (CJ, Audio Research, Marantz, Ampeg, Stax)
(!!!!) (Best Value Pair) 6FQ7 RCA clear top used/good 1964-1967 (6.0/5.8ma and 6.2/5.4ma) (STAX, MARANTZ, CONRAD JOHNSON)
(!!!!) (Single) 6CG7 Tungsol NOS 1960 era black shield between plates - pin #3 slightly shorter (8.6ma/10ma)
(!!!!) (Recommended Pair) 6FQ7 Zenith by GE NOS 1977 (6.5/10.6ma and 6.7/9.2ma)
(!!!) (Best Pair) 6FQ7 GE NOS 1970's (9.8/8.8ma and 8.5/9.6ma) (close Gm)
(!!!!) (Recommended GE Pair) 6FQ7 Zenith by GE NOS 1977 1-3% matched (7.0/7.6m and 6.8/7.5ma)
6CG7 Sylvania Emerson used/good chrome electrostatic shield between plates "U" getter 1957 (6.2/6.8ma)
6CG7 Sylvania gray plates NOS "U" getter 1958 with chrome electrostatic shield between plates (6.8ma/8.8ma)
6FQ7 US Brands used/pull-outs sold as-is (10 for $29.99)
(!!!) (Recommended Pair) 6FQ7 GE NOS 1970's (7.2/9.5ma and 6.5/9.4ma)
(!!!!) (Best Pair) 6FQ7 GE NOS 1960's (7.5/8.0ma and 7.0/7.2ma) (Close Gm) 1-5% matched
(!!!!) (Best Pair) 6FQ7 Zenith by GE NOS 1977 (7.2/8.0ma and 7.0/7.8ma)
(!!!!) (Best Overall Pair) 6FQ7 RCA clear top NOS "D" getter halo 1969 (8.2/8.0ma and 8.0/7.8ma) (close Gm)
(!!) (Best Value Pair) 6FQ7 GE branded Amperex and Westinghouse NOS 1970's (6.4/7.4ma and 6.4/7.4ma) 1-2% matched
(!!) 6FQ7 RCA clear top NOS 1976 (7ma/8ma)
6FQ7 Realistic by GE NOS gold plated pins 1970's (8/6ma)
6FQ7 GE branded RCA NOS 1966 (7.6/7.2ma)
