(!!!!!) (Best Value Pair) 12AU7A RCA NOS 1964-1965 (8.2/11ma and 8.8/10.4ma)
(!!!!!) (Best Value Pair) 6FQ7 RCA clear top NOS 1966-1968 (6/7ma and 6.8/7.2ma) (STAX, MARANTZ, CONRAD JOHNSON)
(!!!!!) (Recommended Pair) 6FQ7 RCA clear top NOS 1969-1970 (7.6/11ma and 8.6/10ma) (STAX, MARANTZ, CONRAD JOHNSON)
(!!!!) (Good Value Pair) 6FQ7 RCA clear top NOS 1970's (6.0/6.4ma and 6.4/7.4ma) (STAX, MARANTZ, CONRAD JOHNSON)
(!!!) (Best Overall Pair) EL36 Haltron Japan clear top NOS 1960's (94ma and 93.5ma)
(!!!) (BEST VALUE PAIR) 12AU7A RCA Bell and Howell and RCA clear top used/good 1960's (8.4/9.0ma and 8.0/8.6ma)
(!!!) (Good Value Pair) 12AU7A RCA clear top used/good 1960's (7.5/9.6ma and 7.5/9.2ma)
(!!!) (Good Value Pair) 12AU7A RCA clear top used/good 1960's (7.8/9.2ma and 7.6/8.8ma)
(!!!) (Good Value Single) 12AU7A RCA NOS 1960's faded printing (9.3/11.8ma)
(!!!) (Recommended Single) 12AU7A RCA clear top used/like new "D" getter halo 1960's (9.0/10.8ma)
(!!) (BEST VALUE SINGLE) 12AU7A RCA clear top used/good 1960's (8.0/9.4ma)
(!!) (Recommended Single) 12AU7A RCA top getter NOS 1970 era (10.2/11ma)
(!!) 12AU7A CBS black plates NOS 1960 era (9.5/11.8ma)
(!!) 12AU7A RCA clear top used/good 1960's (7.4/8.6ma)
(!!) 12AU7A RCA clear top used/good 1964 (8.2/8.6ma)
(!) (Recommended Pair) EL36 Haltron Japan clear top NOS 1960's (86ma and 93ma)
19T8 RCA clear top 1960's (48/30)
6AW8A GE branded Westinghouse NOS 1964 (3.8/24ma)
6AW8A GE NOS 1976 (4.9/21ma)
6L6GC Sylvania clear top NOS 1960's copper grid posts (68ma)