Alum Rock Technology
Alum Rock Technology web site (July 5, 2009): 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.
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