(!!!!) (Good Value Pair) 6FQ7 RCA clear top NOS 1970's (6.0/6.4ma and 6.4/7.4ma) (STAX, MARANTZ, CONRAD JOHNSON)
(!!!) (Recommended Pair) 6FQ7 Sylvania NOS 1970's (9.0/8.0ma and 8.0/7.6ma)
(!!!) (Recommended Pair) 6FQ7 Sylvania NOS 1970's same build (6.4/6.8ma and 6.4/6.4ma)
(!!) (Recommended Single) 6FQ7 RCA clear top NOS D getter 1970 (7.5/11ma)
(!!) 6FQ7 RCA clear top NOS 1963 (8.2ma/9.8ma)
6CG7 Sylvania Emerson used/good chrome electrostatic shield between plates "U" getter 1957 (6.2/6.8ma)