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(!!!!) (#1 307A Pair) 307A=VT-225 Sylvania NOS 1940's (56ma and 60ma)

$ 118.88

1 matched pair) 307A=VT-225 Sylvania NOS mid-1940's original boxes

1 tube) 56ma Gm=4500 (307A)

1 tube) 60ma Gm=4600 (VT-225=307A)

 

Good Ma range = 45-50ma

Good 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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