(!!!!!) (Best Sounding Pair) 12BH7A RCA gray plates NOS 1960's (9.8/10ma and 10.0/10.2ma)
(!!!!!) (Recommended GE Pair) 12BH7A GE gray oval plates NOS 1961 (8.0/8.7ma and 9.0/9.4ma)
(!!!!!) (Recommended Pair) 12BH7A GE NOS 1970's same build (9/10ma and 9/10.6ma) 1-3% matched
(!!!!!) (Recommended Pair) 12BH7A Sylvania NOS 1960's - 1970 (9.8/10.5ma and 10.6/11ma) (same Gm)
(!!!!!) (Recommended Pair) 12BH7A Sylvania NOS 1960's - 1970 (9/10ma and 9/10.4ma) 1-3% matched
(!!!!!) (Recommended Single) 12BH7A RCA Motorola NOS 1964 (8.6/10.6ma)
(!!!!) (RECOMMENDED PAIR) 12BH7A Sylvania NOS pinched plates 1960's - 1970 era 1-2% matched (11.0/11.4ma and 11.4/12.0ma) (Art Audio, Quicksilver, Rogue, Universla Audio)
(!!!!) (Recommended Single) 12BH7A RCA gray ribbed plates NOS 1970 era (8.0/8.5ma) 1-3% section balance
(!!!) (Best GE Single 1954) 12BH7 GE NOS gray oval plates large "U" getter halo 1954 (11.2/12.0ma)
(!!!) (Best Single) 12BH7A Tungsol black plates "O" getter halo 1960 era (12.3/12.4ma) 1-2% section balance
(!!!) 12BH7A RCA branded Zenith NOS 1970 era (10/13.2ma)
(!!) (Recommended Single) 12BH7A Raytheon Black Plates "D" getter NOS 1958 smaller top getter (10ma/14ma)
(!!) 12BH7A RCA gray plates used/good 1960's (8.0/11.2ma)
(!!) 12BH7A RCA gray plates used/good 1960's (8.6/9.6ma)
(!!) 12BH7A RCA gray plates used/good 1970 era (8/9ma)
(!) 12BH7A GE gray oval plates "O" getter halo used/good 1964 (7.2ma/8.5ma)
(!) 12BH7A Toshiba rebranded "Bell and Howell Schools" like new 1960's (9/10.4ma)
12BH7A Triad by Toshiba Japan used/good (8.8/10.2ma)
ECC99 JJ (best identical substitute is 12BH7A RCA, Raytheon, Sylvania and GE)
