(!!) (SINGLE) 307A=VT-225 Sylvania NOS 1940's (44ma)

307A=VT-225 Sylvania NOS 1940's

44ma

Gm=4000

SINGLE TUBE - NOT A PAIR

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