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(!!!) (Recommended Single) JAN-2C51=5670 Sylvania gray plates NOS "D" getter 1960 (6.2/6.4ma) 1-3% section balance
(!!!!) (Single) 2C51=396A Western Electric D getter used/good 1954, pin #4 shorter (5.0ma/5.6ma)
(!!!!) (Best Pair #3) 5670W GE NOS 1986 (7.8/8.8ma and 7.6/8.2ma) 1-5% matched
(!!!!) (Best Pair #2) 5670W GE NOS 1986 (9.4/11ma and 9.8/11.6ma) 1-5% matched (Highest Ma and Gm)
(!!!!) (Best Pair #3) 5670W GE NOS 1986 (8.4/7.2ma and 8.0/7.4ma) (Same Gm) 1-2% matched
(!!!) (Best Single) 2C51=5670 Sylvania NOS 1970's (8.8/8.4ma)
(!!!) (Single) JHS-5670 Sylvania NOS 1966 (7.0/6.8ma)
(!!) (Single) JAN-5670W GE used/good 1970's (6.8/6.0ma)
(!!!!) (BEST SINGLE #2) 2C51=396A=5670 GE NOS "D" getter gray plates 1960 era rebranded National 1970's (8/7ma)