42 Sylvania engraved used good 1940's (30ma)
$ 12.99
42 Sylvania used good 1930's
30ma
Gm=2050
Good Ma range 25-30ma
Good used Gm range 2000-2300
See more: vacuum tube
42 Sylvania used good 1930's
30ma
Gm=2050
Good Ma range 25-30ma
Good used Gm range 2000-2300