12SF5GT NOS (1 in stock)

12SF5GT US Brands NOS

(1) Nat. Union 1940”s

(0) Sylvania 1947

(1) CBS metal base 1940”s

(1) CBS black base (1.0ma Gm=1700)

(1) Hytron 1949

Good Ma = .9ma – 1.0ma

Good Gm = 1500