(!!!!) (#3 5670W GE PAIR) 5670W GE NOS 1976-1978 2-3% matched
(!!!!) (~ Best Pair ~) 5670W GE NOS 1982 1-2% matched (10.4/10.6ma and 10.8/11.4ma) (highest Ma and Gm)
(!!!!) (~ Recommended Pair ~) 5670W GE NOS 1982-1983 (7.0/9.6ma and 7.6/9.6ma)
(!!!) (#1 2C51 Ericsson Single) 2C51L=396A LM Ericsson Sweden "O" getter halo NOS 1960's (7.5/10ma)
(!!!) (#1 6385 Bendix Single) 6385 Bendix Red Bank USA "D" getter halo NOS 1955-1956 original box (8.8/9.5ma)
(!!!) (#2 5670 Sylvania) JHS-5670 Sylvania NOS 1965 (8.0/8.2ma)
(!!!) (#2 6385 Bendix Single) 6385 Bendix Red Bank USA "D" getter halo NOS 1955-1956 original box (7.7/8.0ma) (slightly microphonic)
(!!!) (#3 6385 Bendix Single) 6385 Bendix Red Bank USA "D" getter halo NOS 1955-1956 original box (6.2/7.6ma)
(!!!) (#4 5670 Sylvania) JHS-5670=2C51 Sylvania low hours/tests like new 1966 (8.6/9.0ma)
(!!!) (#5 5670 Sylvania) 5670=2C51 Sylvania low hours/tests like new 1960's (6.6/7.4ma)
(!!) 396A=2C51 Western Electric used 1963 (4.2/4.4ma)
(!!) JHS-5670 Sylvania NOS 1966 (8.5/10ma)
(!) (#3 5670 Sylvania) 5670 Sylvania NOS 1960 "D" getter halo (8.2/10.4ma)
(!) 396A Western Electric O getter halo NOS/70% 1978 (4.2ma/4.6ma)
(slightly microphonic) JG-5670 GE triple mica with D getter halo 1950's (9.8/12.6ma)
396A Western Electric O getter used 1972 (4.2/6.4ma)
JW-2C51=396A Western Electric NOS 1949 (6.4/8.8ma) (1st JW year)
