Alum Rock Technology, based in San Jose, CA, was a versatile manufacturer involved in various industries such as sputtered computer disks, industrial controls, and aviation. They specialized in producing 304TL amplifiers, audio transformers, power transformers, and inductors specifically designed for class A single-ended audio-frequency amplifiers utilizing Eimac vacuum tubes.
Known for their compact stereo 304TL amplifier, Alum Rock Technology prioritized both aesthetics and high-performance capabilities, ensuring efficient utilization of the 304TL in class A service. Although these amplifiers and components are no longer in production, the company's website is maintained to provide support and information for owners of these amplifiers.
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