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(!) (Best Single) 5BK7A GE branded GM Delco black plates "U" getter 1950's (12/13ma) (Highest Ma and Gm)
(!) (Best Single) 5BK7A GE branded GM Delco black plates "U" getter 1950's (12/13ma) (Highest Ma and Gm)
$ 6.99
5BK7A GE branded GM Delco black plates "U" getter 1950's
12ma Gm=6600
13ma Gm=7300
SINGLE TUBE, NOT A PAIR
dual-triode
See more: vacuum tube