(!!) 307A=VT-225 Sylvania NOS 1940's 1 mica flake inside tube (59ma)
$ 49.99
1) 307A=VT-225 Sylvania NOS 1940's 1 mica flake inside tube
59ma
Gm=5000
Good Ma range = 45-50ma
Gm Gm = 4000
(307A=VT-225 Sylvania / Ken-Rad, Identical to Western Electric, 6 Watt Pentode)
(The 307A is a 306A with a quick heating filament, 5.5V @ 1A filament,
5-pin bayonet socket with top cap)
- Peter Millett headphone amp
- Eddie Current Balancing Act
See more: vacuum tube
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