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(!!!) (Recommended Pair) 12A National Union NOS 1950 era different shape top mica (8.5ma and 8.1ma)
(!!!) (Recommended Pair) 12A National Union NOS 1950 era different shape top mica (8.5ma and 8.1ma)
$ 74.99
1 pair) 12A National Union NOS 1950 era different shape top mica
1 tube) 8.5ma Gm=1700
1 tube) 8.1ma Gm=1800
Vplate = 180V
Vgrid = -13.5V
Good Ma = 6-7ma
Good Gm = 1600-1700
See more: vacuum tube
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