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(!!!) (Slightly Microphonic Single) 5670=2C51 Tungsol black plates "D" getter NOS 1958 (9.6/10.2ma)
(!!) (Best Value Single) JAN-5670W GE NOS 1986 (10/7.5ma)
(!) 2C51=396A LM Ericsson Sweden NOS 1960's (11.8/6.8ma)
(slightly microphonic) 5670 RCA NOS triple mica "O" getter halo 1961 (7.6/10.8ma)
(!!!!) (Best Pair #2) 5670W GE NOS 1986 (9.0/8.2ma and 8.6/9.0ma) 1-3% matched
(!!!!) (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
(!!!!) (Single) 5670W GE JAN NOS 1986 (8.6/8.8ma)
(!!!) (Single) JHS-5670 Sylvania NOS 1966 (7.0/6.8ma)
(!!) (Single) JAN-5670W GE used/good 1970's (6.8/6.0ma)
(!!!) (Slightly Microphonic Single) 5670=2C51 Tungsol black plates "O" getter NOS 1960 era (8.4/8.8ma)
(!!) (Single) JAN-5670W GE NOS 1978 (9.8/9.0ma)
(!!!!) (Best Value Single) 5670W GE JAN NOS 1986 (8/10.4ma)
