Automotive vacuum tube amplifier
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Vacuum tube radios and amplifiers were used in automobiles until being displaced by transistorized radios. This shift occurred for the same reasons as in almost all other electronic devices: transistors are smaller, cooler, cheaper, more durable, use less power and are ready to operate much quicker.
Some enthusiasts prefer "tube amps", so a small number of tube car stereos are still made. Manufacturers include Milbert Amplifiers, Blade, Manley, and Sear Sound. Some are "hybrid" designs with transistorized power supplies and a few "token tubes".
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