Alum Rock Technology manufactures a 304TL amplifier, plus audio transformers and related power transformers and inductors. These components are specifically designed for class A single-ended or push-pull audio-frequency amplifiers which use Eimac 304TL, 152TL, or 75TL vacuum tubes and offered in sets. Alum Rock's compact stereo 304TL amplifier is designed for appearance, uncompromising performance, and efficient use of the 304TL in class A service. It measures 19 5/8 inches wide, 18 1/4 high, and 18 1/2 deep and weighs approximately 200 pounds.
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