GD 300B Super (2 Matched Tubes - Pair) Pack contains 2 Tubes. The 300B audio power triode was originated by the Western Electric division of AT&T in 1935 and used at first in movie-theatre amplifiers, later in regulated power supplies. ...more
Tube-Shop Price $329.95
GD 300B Super (4 Matched Tubes - Quad) Pack contains 4 Tubes. The 300B audio power triode was originated by the Western Electric division of AT&T in 1935 and used at first in movie-theatre amplifiers, later in regulated power supplies. ...more
