307A=VT-225 Ken Rad NOS/75% coated glass 1940's (34ma)
$24.99
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307A=VT-225 Ken Rad NOS/75% coated glass 1940's 34ma 75% Gm=3100 75% 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
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