Author: Tom Harold

The namesake of the tube amplifier is the vacuum tube, a small but important component that controls the flow of electric current through a vacuum. Today American Blue Scene is going to look at power tubes. The tubes of an amplifier are easily recognizable when viewing it from the back. They are the glass tubes jutting down (or up, depending on the amp design) from the amp chassis. The smallest tubes are the preamp tubes, the larger ones the power tubes, and the largest is generally the rectifier tube. The power tubes are part of the power amplifier stage of…

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