(!!!!) (Best Single) 5814A RCA COMMAND SERIES NOS black plates 1964 (11/11ma) 1% section balance
(!!!!) (Recommended Pair) 5654=6AK5 RCA Command Series black plate NOS 1964-1966 (9.2ma and 8.3ma) (Same Gm)
(!!!!) GL=5654=6AK5W GE 5 Star NOS 1954 (6.8ma)
(slightly microphonic) 5670 RCA NOS triple mica "O" getter halo 1961 (7.6/10.8ma)
5654=6AK5 RCA black plate NOS 1976 (7.2ma)